KR0165926B1 - Auto drain - Google Patents

Abstract

It is an auto drain installed in the pneumatic pipe of the pneumatic actuator and used for separating and discharging the discharged water in the pipe. The discharge valve sheet for discharging the discharged water into the discharge guide tube 33 at the bottom of the case 32 in which the discharged water is stored. (34) is provided, and the discharge valve body (41) is attached to the piston (40) driven by the air pressure in the pilot chamber (42) which changes according to the movement of the float (39) inside the case (32). In the installed auto drain, the discharge valve body 41 is formed by installing an annular seal member on the outer circumferential surface of the piston 40, and a plurality of discharge water is provided on the inner surface of the discharge guide cylinder 33. In addition to providing a discharge groove 34a, a guide surface 34b for guiding the discharge valve body is provided between the discharge water discharge groove 34a, and the discharge valve body 41 opens and closes the discharge valve sheet 34. The guide surface 34b between the discharge water discharge grooves 34a. The seal member is guided to prevent the seal member from falling off due to the flow of the discharged water.

Description

[Name of invention]

Auto drain

[Technical Field]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a normally sealed or normally open oat drain for separating and discharging discharged water in a pipe via a pneumatic pipe for supplying compressed air to a pneumatic actuator.

[Background]

In the auto drain for automatically discharging the discharged water, the inside of the case where the discharged water is stored is pressurized by the pressure fluid. When the discharged water is low, the discharge valve body is closed by the drop of the float. When the discharged water is stopped, but the height of the discharged water is increased, the discharge valve body is opened by the floating of the float, and the normally sealed auto drain is discharged inside the case, and the discharge valve body when the case inside is unpressurized. Normally open type in which the discharge water can be discharged by opening the valve, and when the inside of the case is pressurized, the discharge valve body closes the flow path and stops discharge of the discharge water, unless the float floats as in the case described above. There are auto drains, and these two types of auto drains are already known.

FIG. 15 shows an example of a conventional normally sealed auto drain. The auto drain 1 includes a case 2 and a bottom of the case 2 in which the discharged water flowing in from the upper side with the compressed air is stored. (2) the discharge guide tube (3) of the discharged water fixed to the outlet), the discharge valve sheet (4) formed on the inner circumferential surface of the through hole of the discharge guide cylinder (3), and the manual valve support attached to the lower part of the cabbage guide cylinder (3) The diameter of the discharge valve seat 4 is provided with the member 5 and the manual operation member 6, and the diameter lower than the discharge valve seat 4 in the discharge guide cylinder 3 is for discharging the discharge water. It is larger.

The float guide 8 connected above the discharge guide cylinder 3 has a guide cylinder for guiding the shanghai dong of the float 9, and is a cylinder inserted in the float guide 8 so as to be slidable. The piston 10 of the shape has a discharge valve body (sealing member) 11 for opening and closing the discharge water flow path while being in contact with or separated from the discharge valve seat 4 on the outer circumferential surface of the cylindrical shaft portion extending from the lower portion thereof.

The above-mentioned float guide 8 is connected to the inside of the case 2 by the piston 10 through the pilot chamber 12 above and the drain hole 8a of the float guide 8 ( The pilot valve seat 14 which is divided into the hydraulic pressure chamber 13 below 10, and opens in the pilot chamber 12 is formed in the upper end of the guide cylinder part, and this pilot valve sheet 14 is opened and closed. The pilot valve body 15 is connected to the upper end of the float guide 8 so as to be able to swing freely, and is attached to the lever 17 connected to the float 9 by the holder 18. In addition, an orifice 19 having a diameter smaller than the diameter of the pilot valve seat 14 is formed in the partition wall provided in the piston 10, and the pilot chamber 12 and the manual operation member 6 are formed inside. The inside of the cylindrical piston 10 opened to the outside is communicated through. In addition, the pilot chamber 12 is provided with a first spring 21 for pushing the piston 10 downward, between the piston 10 and the lifting cylinder 6a of the manual operation unit 6. Second springs 22 for pushing the upwards 10 are provided, respectively.

In the known auto drain 1 having the above-described configuration, when the inside of the case 2 is pressurized by the compressed air and the state where the height of the discharged water is shown in the drawing is low, the float is lowered. Since the pilot valve body 15 closes the pilot valve seat 14, the pilot chamber 12 communicates with the outside by the orifice 19, and the piston 10 opposes the spring 21 acting. By means of the spring tension of () and (22), the discharge valve body 11 is in a neutral position for closing the discharge valve seat 4.

When the float 9 rises due to the height of the discharged water of the case 2 rising, the lever 17 rotates counterclockwise in the drawing so that the pilot valve body 15 opens the pilot valve seat 14. Compressed air in the case 2 is supplied to the pilot chamber 12, whereby the piston 10 is operated downward so that the discharge valve body 11 opens the discharge valve sheet 4. 2) The discharged water is discharged through the drain through hole 8a, the periphery of the discharge valve body 11, and the lifting cylinder 6a of the manual operation member 6.

When the height of the discharged water decreases, the float 9 descends so that the pilot valve body 15 closes the pilot valve seat 14, and the air in the pilot chamber 12 is discharged from the orifice 19 to the outside. As the air pressure gradually decreases, the piston 10 gradually returns to the neutral position due to the spring tension of the springs 21 and 22, and after some time has passed, the discharge valve body 11 discharges the discharge valve seat. (4) is closed to discharge the discharged water.

In the known auto drain 1, when the piston 10 is operated downward for discharging the discharged water, there is a gap between the discharge valve body 11 inserted into the outer peripheral surface of the piston and the inner peripheral surface of the discharge guide cylinder 3; As a result, the downwardly actuated piston 10 may be inclined or the discharge valve 11 made of the seal member may be released from the piston 10 due to the flow of the discharged water. Therefore, even when discharge of the discharged water is terminated, The piston 10 may not return to its original position, and the discharge valve seat 4 may remain open.

Incidentally, although the normally closed auto drain is described here, when the pressure is not applied to the case 2, the same problem occurs in the normally open auto drain in which the discharge valve body always opens the discharge valve sheet. There is this. In addition, the above-mentioned normally closed and normally open autodrains have substantially the same functions as described above, and since these parts are difficult to use in common, these parts are manufactured separately, which are normally sealed and normally open. If two types of parts can be used in common, not only can manufacturing cost be reduced, but also the parts management becomes very easy.

[Initiation of invention]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the conventional auto drain and to provide an oat drain with stable and reliable operation of the discharge valve body.

Another object of the present invention is to guide the discharge valve body by the guide surface between the discharge water discharge grooves, even when the drain valve body is lifted by the piston to open and close the discharge valve sheet, so that the piston is inclined or constitutes the discharge valve body. It is to provide an oat drain that prevents the seal member from falling off.

Another object of the present invention is to provide an autodrain which can be normally sealed or the above open type by selecting a spring using a common component.

Another object of the present invention is to provide an auto drain having a simple structure and a manual effluent discharge device operating in a stable state.

In order to achieve the above object, the auto drain of the present invention is provided with a discharge valve sheet for discharging the discharged water in the discharge guide tube of the case bottom in which the discharged water is stored, and is opened and closed by the vertical movement of the float installed inside the case. A piston driven by the compressed air in the pilot chamber is inserted into the pilot chamber communicating with the inside of the case through the pilot valve sheet, and the piston is provided with a discharge valve sheet for opening and closing the discharge valve sheet. In the auto drain, the discharge valve body is constituted by providing an annular seal member on the outer circumferential surface of the piston, and a plurality of discharge water is provided on the inner surface of the discharge guide cylinder which moves when the discharge valve body opens the discharge valve sheet. In addition to providing a discharge groove, a guide surface for guiding the discharge valve body is provided between the discharge water discharge grooves. The diameter of the surface is approximately equal to or slightly larger than the diameter of the discharge valve sheet, or in the above-described auto drain, the discharge valve sheet is formed by installing an annular seal member on the inner surface of the discharge guide cylinder. And a guide surface for guiding the seal member between the discharge water discharge grooves while providing a plurality of discharge water discharge grooves on the circumferential surface of the discharge valve body that the seal member abuts when the discharge valve body opens the discharge valve sheet. And the diameter of this guide surface is made the same or slightly smaller than the diameter of the discharge valve seat.

More specifically, the above-described auto drain is provided with a discharge valve sheet for discharging the discharge water in the discharge guide cylinder at the bottom of the case storing the discharge water, and freely lifts and floats the float guide connected to the discharge guide cylinder. In addition to the guiding, the center of the float guide is inserted into the float guide, and the pilot chamber is partitioned and formed, and the pilot valve sheet opened in the pilot chamber is moved by the vertical movement of the float. The pilot valve body which drives and opens and closes it is arrange | positioned facing, and the said piston may be provided with the discharge valve body which opens and closes the said discharge valve seat by sliding, In this case, a discharge guide cylinder and a piston The spring of the normally closed spring which pushes a piston in the direction which a discharge valve body closes a discharge valve seat between and A spring sheet of a normally open spring is provided between the float guide in the pilot chamber and the piston in the pilot chamber, and the piston is pushed in the direction in which the discharge valve body opens the discharge valve sheet. The normally open spring or the normally open spring can be selectively mounted.

In the above-described auto drain, the piston with the discharge valve body and the start operation member inserted into the discharge guide cylinder are provided with a coupling portion that can be engaged with each other, and the piston is moved by the downward movement of the manual operation member. It may be possible to move downward to open the discharge valve seat.

In the case where the auto drain having the above-described configuration is normally sealed, the inside of the case is pressurized by the compressed air flowing in, and when the discharge water is low, the discharge valve body is discharged by the spring tension of the normally closed spring. The discharge of the discharged water is stopped by closing the sheet, and when the height of the discharged water rises in this state, the float floats and the compressed air inside the case is opened in the pilot chamber so that the pilot valve body opens the pilot valve sheet. Since the piston moves downward by the action force of this air pressure, the discharge valve body opens the discharge valve sheet and discharge water is discharged.

When the height of the discharged water is lowered by the discharge of the discharged water, the float descends and the pilot valve body closes the pilot valve seat, so that the air in the pilot chamber is discharged and its working force is lowered, and the piston returns to the discharge valve. The sieve closes the discharge valve seat to stop the discharge of the discharged water.

On the other hand, in the case of the normally open auto drain, when the inside of the case is not pressurized, the piston moves downward due to the spring tension of the normally open spring, and the discharge valve body opens the discharge valve sheet. It is discharged without work. When the compressed air flows into the case and becomes pressurized, it operates in the same manner as the normally open auto drain described above.

In the operation of the above-mentioned auto drain, the discharge valve body formed by inserting the seal member in the distal end portion of the piston, or the discharge valve sheet formed by inserting the annular seal member into the inner surface of the discharge guide tube always discharges the discharged water. Since the piston is guided and slides between the grooves, the shank movement of the piston is stabilized and does not incline, and the seal member does not come off from the insertion portion. When the discharge valve body opens the discharge valve sheet, the discharge water is discharged through the discharge water discharge groove, so that even if the guide surface is always in contact with the seal member, discharge of the discharge water does not interfere.

When the spring sheet of the normally closed spring is provided between the sales guide cylinder and the piston, and the float in the pilot chamber is provided between the guide and the piston, the spring sheet of the normally open spring is closed. By mounting a spring or a normally open spring selectively, the auto drain can be used as a normally sealed type or the above open type. Therefore, the normally sealed type and normally open type auto drain can be assembled by common parts, and the normally sealed type and normally open type are mutually Can also be easily changed.

In addition, a coupling part that can be engaged with each other is provided on the piston with the discharge valve body and the manual operation member inserted into the discharge guide tube, and the piston is moved downward to open the discharge valve sheet by moving downward of the manual operation member. When it is possible to move the gas, the discharge valve sheet can be opened by the operation of the manual operation member and the discharged water can be discharged. In this case, since the discharged water is manually discharged from the discharge valve sheet which automatically discharges the discharged water, This is different from the case of discharging the discharged water from the water discharge path for water, and since there is no blockage of the discharge flow path or adhesion of the seal member, the discharged water can be discharged reliably.

[Brief Description of Drawings]

1 is a longitudinal sectional front view showing the construction of a normally sealed auto drain according to the first embodiment of the present invention.

2 is a longitudinal sectional view similarly at the time of discharge of discharged water.

3 is a cross sectional view of the discharge guide.

4 is a longitudinal sectional view of an essential part of the second embodiment of the present invention.

5 is a longitudinal sectional front view showing the construction of the normally sealed auto drain according to the third embodiment of the present invention.

6 is similarly a longitudinal section at the time of discharge valve body closing.

7 is a longitudinal sectional view of an essential part of the fourth embodiment of the present invention.

8 is a longitudinal sectional front view showing the construction of the normally sealed auto drain according to the fifth embodiment of the present invention.

9 is similarly a longitudinal section at the time of discharge of the discharged water.

10 is a longitudinal sectional front view showing the construction of the normally sealed oat drain according to the sixth embodiment of the present invention.

11 is a longitudinal cross-sectional view similarly when the discharge valve body is closed.

FIG. 12 is a schematic explanatory diagram for explaining the pressure relation at the time of opening and closing of the auto drain in the fifth and sixth embodiments.

Fig. 13 is a vertical front view showing the construction of the normally sealed auto drain according to the seventh embodiment of the present invention.

14 is a longitudinal sectional front view showing the construction of the normally sealed auto drain of the eighth embodiment of the present invention.

Fig. 15 is a vertical cross sectional view of a known auto drain.

Best Mode for Carrying Out the Invention

1 to 3 show the first embodiment of the present invention in which the auto drain is normally sealed. The normally sealed auto drain 31 is a case for storing the discharged water flowing in from the top together with the compressed air. 32, a discharge valve sheet formed on the inner circumferential surface of the through hole of the discharge guide cylinder 33 at the bottom of the discharge guide cylinder 33 of the discharge water inserted into the opening at the lower end of the case 32; (34), a float provided with a manual valve support member (35) attached to a lower portion of the discharge guide cylinder (33) and a manual operation member (36), and connected above the discharge guide cylinder (33). The cylindrical piston 40 is inserted in the guide 38 so that sliding movement is possible, and the discharge valve seat is contacted with or separated from the discharge valve seat 34 on the outer circumferential surface of the cylindrical shaft portion formed extending from the lower portion thereof. (34) To the annular seal member for opening and closing the discharge water flow path therein The discharge valve body 41 formed by this is inserted.

On the inner circumferential surface of the lower portion than the valve seat of the discharge guide cylinder 33, as shown in FIG. 3, a plurality of discharge water discharge grooves 34a along the axial direction are formed, and the discharge water discharge grooves ( The guide surface 34b of the discharge valve body 41 is formed between 34a). The diameter of this guide surface 34b is equal to or slightly larger than the diameter of the discharge valve seat 34.

The float guide 38 has a guide cylinder portion for guiding the shanghai movement of the float 39 in the upper half thereof, and slides the cylindrical piston 40 in the lower portion inside the float guide 38. By inserting as much as possible, the hydraulic pressure below the piston 40 communicating in the case 32 through the pilot chamber 42 above the piston 40 and the drain hole 38a of the float guide 38 is provided. The pilot valve body 44 which divides into the seal 43 and opens to the pilot chamber 42 is formed in the upper end of a guide cylinder part, and the pilot valve body which opens and closes this pilot valve sheet 44 ( 45 is attached to the upper end of the float guide 38 so that it can swing freely, and is attached to the lever 47 which connected the tip to the float 39 by the holder 48. As shown in FIG.

In addition. In the partition wall provided in the piston 40, an orifice 49 having a diameter smaller than that of the pilot valve seat 44 is formed, and is moved to the outside through the pilot chamber 42 and the manual operation member 36 inside. The inside of the open cylindrical piston 40 is communicated. In addition, the pilot chamber 42 is provided with a first spring 51 for pushing the piston 40 downward, and is provided between the piston 40 and the lifting cylinder 36a of the manual operation member 36. The second spring 52 which pushes the piston 40 upward is provided, and when these springs 51 and 52 oppose each other and the air pressure does not act on the piston 40, the said One piston 40 is pushed in such a way that the discharge valve body 41 is supported at a neutral position in which the discharge valve seat 34 is closed.

In the drawing, reference numeral 54 denotes a pipe main body, 55 denotes an inlet for compressed air, 56 denotes an outlet of compressed air, and 59 denotes a case guard.

In the normally sealed auto drain of the first embodiment, as shown in FIG. 1, when the inside of the case 32 is pressurized by the inflow pressure fluid, and when the height of the discharged water is low, the float ( 39 is lowered, and since the pilot valve body 45 closes the pilot valve seat 44, the piston 40 is neutralized by the spring tension of the springs 51 and 52 which oppose each other. In the position, the discharge valve body 41 closes the discharge valve seat 34 and discharge of the discharged water is stopped.

When the float 39 floats due to the rise of the discharge water height inside the case 32, as shown in FIG. 2, the lever 47 rotates counterclockwise, so that the pilot valve body 45 Since the lot valve seat 44 is opened, the compressed air inside the case 32 flows into the pilot chamber 42 so that the air pressure of the pilot chamber 42 rises and is discharged from the orifice 49 to the outside. The amount of air flowing into the pilot chamber 42 through the pilot valve sheet 44 is larger than the amount of air, whereby the piston 40 moves downward so that the discharge valve body 41 discharges the discharge valve sheet 4. By opening), the discharged water in the case 32 is discharged to the outside through the discharged water discharge groove 34a formed in the discharge guide cylinder 33.

In this case, since the discharge valve body 41 inserted into the outer peripheral surface of the tip portion of the piston 40 slides in contact with the guide surface 34b between the discharge water discharge grooves 34a, the piston 40 moves upward and downward. The piston 40 moves up and down reliably without being inclined by or by the valve body 41 falling off from the piston 40 due to the flow of discharged discharged water.

When the float 39 descends due to a decrease in the discharged water height, the lever 47 rotates clockwise so that the pilot valve body 45 closes the pilot valve seat 44. Air is discharged from the orifice 49 to the outside, and the air pressure gradually decreases. Therefore, the piston 40 returns to the neutral position by the spring tension of the springs 51 and 52, and the discharge valve body 41 The discharge valve seat 34 is closed to discharge the discharged water.

In the case of manually discharging the discharged water, the manual operation member 36 is moved upward and the piston 40 is moved upward through the second spring 52 by the upper end of the elevating cylinder 36a, and the discharge valve The sieve 41 is moved above the discharge valve sheet 34 to form a discharge water discharge passage.

In the above-described auto drain of the first embodiment, the discharge valve sheet 34 on the inner surface of the discharge guide cylinder 33 is discharged by contacting or separating from the outer peripheral surface of the cylindrical shaft portion extending and provided below the cylindrical piston 40. The discharge valve body 41 formed by the seal member for opening and closing the flow path is inserted. As in the second embodiment shown in FIG. 4, an annular seal member is inserted into the inner circumferential surface of the discharge guide cylinder 63. It is also possible to provide one discharge valve seat 64 to form a discharge valve body 66 for opening and closing the discharge valve seat 64 on the outer circumferential surface of the cylindrical portion of the piston 65.

In this case, a plurality of discharge water discharge grooves 66a are provided above the discharge valve body 66 on the outer peripheral surface of the cylindrical portion of the piston 65, and the discharge valve sheet 64 is interposed between these discharge water discharge grooves 66a. The guide surface 66a guided by) is installed. The diameter of this guide surface 66b is approximately equal to or slightly smaller than the diameter of the discharge valve body 66. Then, the manual operation member 68 is moved upward to move the piston 65 upward by the upper end of the elevating cylinder 68a, and to move the discharge valve body 66 above the discharge valve sheet 64. In order to stabilize the piston 65 in this case, a discharge groove and a guide surface can be provided below the discharge valve body 65.

In the second embodiment, when the piston 65 moves downward to discharge the discharged water, the discharged water is discharged through the discharged water discharge groove 66a, and the guide surface 66b between the discharged water discharge grooves 66a is formed. Since it moves downward while abutting against the discharge valve seat 64 which consists of a seal member, the inclination of the piston 65 and the seal member and fall-out from the discharge guide cylinder 63 are prevented.

In addition, since the other structure and operation | movement of said 2nd Embodiment are the same as that of 1st Embodiment, the detailed description about the point is abbreviate | omitted.

5 and 6 show a third embodiment of the present invention in which the auto drain is normally open. In this normally open type auto drain 71, the lower expansion portion 74b of the float guide 74 on the discharge guide cylinder 73 inside the case 72 is used. In this case, the piston 75 having a large pneumatic action area is inserted freely in a sliding state, so that the float guide 74 inside the pilot chamber 75 above the piston 75 and the hydraulic pressure below the piston 75. It is partitioned into the chamber 77, and the always-opening spring 78 which pushes the piston 75 downward is provided in the pilot chamber 76 inside.

In addition, similarly to the first embodiment, the outer circumferential surface of the cylindrical shaft portion extending from the lower portion of the piston 75 is in contact with or separated from the discharge valve sheet 79 inside the discharge guide cylinder 73 to form the discharge valve sheet 79. The discharge valve body 80 formed of the annular sealing member which opens and closes the discharge flow path inside is inserted, and the inner peripheral surface of the lower part than the discharge valve sheet 79 in the discharge guide cylinder 73 mentioned above is inserted, A plurality of discharge water discharge grooves 79a in the axial direction as described with reference to FIG. 3 are provided, and a guide surface 79b of the discharge valve body 80 is formed between the discharge water discharge grooves 79a. The diameter of this guide surface 79b is equal to or slightly larger than the diameter of the discharge valve seat 79.

Then, the pipe attachment member 81 is fastened to the lower end of the discharge guide cylinder (73). In addition, since the other structure of this 3rd Embodiment is substantially the same as 1st Embodiment, the detailed description is abbreviate | omitted.

In the auto drain of the third embodiment described above, in the state of FIG. 5 in which the case 72 is not pressurized by the pressure fluid, the piston 75 moves downward by the spring tension of the normally open spring 78. Therefore, the discharge valve body 80 opens the discharge valve sheet 79. Therefore, the discharged water is in a discharged state without being stored in the case 72.

When the inside of the case 72 is pressurized by the pressure fluid, and when the height of the discharge water is low, the float 82 descends and the pilot valve body 83 closes the pilot valve seat 84 so that Since the lot chamber 76 communicates with the outside through the orifice 85 formed in the piston 75, while the air pressure acts on the hydraulic chamber 77 which communicates with the inside of the case 72, FIG. As indicated, the piston 75 moves upward while overcoming the spring tension of the normally open spring 78, and the discharge valve body 80 closes the discharge valve seat 79 so that discharge of the discharged water is stopped.

When the float 82 rises due to the storage of discharged water, the pilot valve body 83 opens the pilot valve seat 84, and the action force of the compressed air supplied to the pilot chamber 76 and the normally open spring ( Since the piston 75 moves downward by the force of the spring tension of 78, the discharge valve body 80 opens the discharge valve seat 79, and discharge water is discharged | emitted.

The falloff of the discharge valve body 80 in this third embodiment is the same as that in the first embodiment.

The auto drain 91 of the fourth embodiment of the present invention shown in FIG. 7 is a part of the structure of the third embodiment. The drain valve is inserted into the inner circumferential surface of the discharge guide cylinder 92 by discharging the discharge valve. The sheet 93 is formed, and the discharge valve body 95 which opens and closes the discharge valve sheet 93 is formed in the outer peripheral surface of the cylindrical part of the piston 94. As shown in FIG. Further, a guide surface 95b is formed above the discharge valve body 95 at the tip of the piston 94 between the discharge water discharge groove 95a and the discharge water discharge groove.

In addition, since the other structure and operation | movement of 4th Example are substantially the same as the case of 3rd Example, detailed description about them is abbreviate | omitted.

Next, with reference to FIGS. 8 and 9, a fifth embodiment of the present invention which uses almost common parts and can be normally open or normally sealed by spring selection will be described.

The doot drain 101 of the fifth embodiment shows a case where it is configured as a normally sealed type, and includes a case 102 for storing the discharged water flowing in from the upper side together with the compressed air, and the discharged water inserted into the opening at the bottom of the case 102. A discharge guide cylinder (103), a fixed member (104) fastened to the distal end of the discharge guide cylinder (103), and a pipe attachment member (105) with a manual operation valve attached to the fixed member (104); In addition, a cylindrical piston 107 is slidably inserted into the lower enlarged portion 106b of the float guide 106 connected above the discharge guide cylinder 103, and the lower outer periphery The discharge valve body 109 formed of an annular seal member which opens or closes the discharge flow path inside the discharge valve sheet 108 while contacting or separating the discharge valve sheet 108 of the upper inner circumference of the discharge guide cylinder 103 is It is inserted.

In addition, on the inner circumferential surface of the lower portion than the discharge valve seat 108 in the discharge guide cylinder 103 described above, similar to the discharge guide cylinder 3 described with reference to FIG. 108 is formed, and the guide surface 108b of the discharge valve body 109 is formed between the discharge water discharge grooves 108a. The diameter of this guide surface 108b is equal to or slightly larger than the diameter of the discharge valve seat 108.

In the above-described auto drain, the float guide 106 connected to the discharge guide cylinder 103 has a guide cylinder portion for guiding the shanghai-dong of the float 110 in the upper half thereof, and the inside of the float guide 106. The piston 107 inserted into the lower diameter expanding portion 106b is inserted into the outer circumference of the upper diameter expanding portion 107a, and a sealing member 111 sliding along the inner circumferential surface of the float guide 106 is inserted. The piston 107 communicates the inside of the float guide 106 with the pilot chamber 112 above the piston 107 and the inside of the case 102 via the drain hole 106a of the float guide 106 by the 107. The compartment is divided into a hydraulic pressure chamber 113 below.

The pilot valve seat 114 which opens in the pilot chamber 112 is formed in the upper end of the guide cylinder part of the float guide 106, and the pilot valve body 115 which opens and closes this pilot valve seat 114 is It is attached to the upper end of the float guide 106 so as to be able to swing freely, and the tip is connected to the lever 117 connected to the float 110 by the holder 118. In addition, an orifice 121 smaller than the diameter of the pilot valve seat 114 is formed in the partition wall 120 provided inside the piston 107.

The upper end of the discharge guide cylinder 103 and the enlarged diameter portion 107a of the piston 107 is provided with a spring sheet of the normally closed spring 123, between which the piston 107 is attached to the pilot chamber 112 The normally closed spring 123 which pushes toward the side is provided. As apparent from FIG. 8, the piston 107 pushed by the normally closed spring 123 and pushed up to the uppermost position in the float guide 106 has a discharge valve body 109 provided at the lower end thereof. It is located in contact with the discharge valve seat 108 of the discharge guide cylinder 103.

In addition, the end 124 formed by the enlarged diameter portion 106b of the float guide 106 and the partition wall 120 inside the piston 107 have a spring sheet of a normally open spring used in the sixth embodiment described later. Forming.

The discharge guide cylinder 103 is attached to the case so that the flange (103a) integrally formed on the outer periphery of the upper end abuts on the bottom surface of the case 102, the discharge guide cylinder 103 of the flange 103a On the outer circumferential surface of the tubular portion in contact with the lower surface and the casing 102 below and the outer circumferential surface of the portion where the fixing member 104 is fastened, a plurality of manual valve discharge water discharge grooves 125 are provided, and these discharge water discharge grooves 125 Is connected to the discharge passage 126 in the pipe attachment member 105 described above.

The pipe attachment member 105 includes a passage 128 along the manual control valve 127 searched thereon, and the discharge passage 126 described above through the passage 128 by operation of the manual control valve 127. To communicate with an oil supply passage 129 in the pipe attachment member 105. The manual valve 127 has an upper coupling to seal the passage 128 with a seal ring 130 at its distal end. The spring tension of 132 is acting. Therefore, by pushing the manual control valve 127 against the spring tension of the upper sheath spring 132, the discharge water can be discharged manually.

In the drawing, reference numeral 134 denotes a pipe main body, 135 denotes an inlet for compressed air, 136 denotes an outlet of compressed air, and 139 denote a case guide.

In the auto drain 101 having the above-mentioned configuration, in the state where the inside of the case 102 is pressurized by the pressure fluid which flowed in, and in the state where the height of the discharged water inside the case 102 is low, the float ( 110 is lowered so that the pilot valve body 115 closes the pilot valve seat 114, and the pilot chamber 112 moves to the outside through the orifice 121 and the oil passage 129 of the partition wall 120. In communication with each other, the piston 107 moves upward by the spring tension of the normally closed spring 123, and the discharge valve body 109 closes the discharge valve seat 108.

If the height of the discharged water in the case 102 increases, as shown in FIG. 9, the float 110 floats and the pilot valve body 115 opens the pilot valve seat 114, so that When the air pressure of the lot chamber 112 rises and the action force becomes larger than the spring tension of the normally closed spring 123, the piston 107 is lowered and the discharge valve body 109 opens the discharge valve seat 108. Therefore, the drain passage 106a installed in the float guide 106, the discharge water discharge groove 108a of the discharge guide cylinder 103, and the oil supply passage inside the pipe attachment member 105 may be discharged. 129 is discharged to the outside.

In addition, when the height of the discharged water inside the case 102 decreases due to the discharge of the discharged water, the float 110 descends, and the pilot valve body 115 closes the pilot valve sheet 114, whereby Air in the lot chamber 112 is discharged from the orifice 121, so that the pilot air pressure of the pilot chamber 112 gradually decreases. Therefore, when the action force of the pilot air pressure in the pilot chamber 112 becomes smaller than the spring tension of the normally closed spring 123, the piston 107 moves to the upper part and returns to the state of FIG. The discharge ends.

In addition, when the manual operation valve 127 of the pipe attachment member 105 is pushed, the sealing ring 130 opens the discharge passage 126, so that the discharge water inside the case 102 is discharged into the main passage 129.

Also in this fifth embodiment, since the discharge valve body 109 slides in contact with the guide surface 108b between the discharge water discharge grooves 108a, the piston 107 is inclined by the shanghai copper, or The piston 107 moves up and down reliably without the discharge valve body 109 falling off from the piston 107 by the flow of the discharged water discharged.

Also, as described below in FIG. 10 and FIG. 11 as the sixth embodiment, it is only necessary to replace the normally closed spring 123 or the like (piping member with a manual operation valve provided as necessary). This can be used as a normally open auto drain.

The normally open auto drain 141 of the sixth embodiment of the present invention shown in FIG. 10 and FIG. 11 replaces the normally closed spring 123 in the fifth embodiment of the float guide 106. An always-opening spring 143 is provided between the end portion 124 of the enlarged diameter portion 108b and the spring sheet formed on the partition wall 120 of the piston 107, and the tip of the discharge guide cylinder 103 is provided. In place of the piping attachment member 105 with the manual operation valve in the above, the piping attachment member 145 without the manual operation valve is attached.

The normally open auto drain 141 of the sixth embodiment is the same as the normally sealed auto drain of the fifth embodiment except for the above-described configuration, and is formed using a part common to the normally sealed auto drain. Therefore, the same code | symbol is attached | subjected to the same location in drawing, and description of a detailed structure is abbreviate | omitted.

When the inside of the case 102 is not pressurized by the compressed air, as shown in FIG. 10, the doot drain 141 of the sixth embodiment has a piston by the spring tension of the spring 143 described above. Since 107 is moving in and out, the discharge valve body 109 opens the discharge valve sheet 108. Therefore, the discharged water is discharged to the outside without being stored in the case 102.

When the inside of the case 102 is pressurized by the inflow of compressed air, the pressure of the hydraulic pressure unit 113 rises, and an upward force acts on the piston 107, which acts as a force of the normally open spring 143. When it is larger than the spring tension, as shown in FIG. 11, since the piston 107 moves upward, the discharge valve body 109 closes the discharge valve seat 108, and discharge | emission of discharge water stops.

In the state shown in FIG. 11, when the height of the discharged water inside the case 102 increases, the discharged water inside the case 102 is discharged in the same manner as the normally sealed auto drain of the fifth embodiment.

12, the structure of the auto drain of 5th and 6th Example mentioned above is shown typically. Here, the internal pressure of the case 102 (P), the pressure of the pilot chamber 112 (P ₁ ), and the diameter of the enlarged diameter portion 107a of the piston 107 is the piston 107 of (D ₁ ). The diameter of the shaft diameter portion (107b) of (D ₂ ), the spring tension of the normally closed spring (123) (S ₁ ), the spring tension of the normally open spring (143) (S ₂ ), said diameter-expansion portion (107a) If the slip resistance of f) is set to f ₁ and the slip resistance of the shaft diameter portion 107b is set to f ₂ , the piston (when the inside of the case 102 in the normally sealed auto drain 101 is not pressurized) is The upward force and downward force acting on 107) are S ₁ > f ₁ + f ₂ .

When the inside of the case 102 is pressurized, the relationship between these forces acting on the piston 107 is

{(D ₁ ² -D ₂ ² ) π / 4} P + S ₁ + f ₁ + f ₂ (D ₁ ² × π / 4) P ₁

When the piston 107 is lowered, the discharged water is discharged.

In addition, when the discharged water is discharged, the float 110 descends and the pilot valve body 115 closes the pilot valve seat 114, so that the supply of air to the pilot chamber 112 is cut off. Since air is discharged from the orifice 121 to the outside, the air pressure of the pilot chamber 112 is lowered, and the relationship between the above-mentioned forces

{(D ₁ ² -D ₂ ² ) π / 4} P + S ₁ f ₁ + f ₂

When the piston 107 is moved to the top, the discharge of the discharged water is stopped.

On the other hand, in the case of the normally open auto drain 141, when the inside of the case 102 is in a non-pressurized state, the relation of the above-mentioned force acting against the piston 107 becomes f ₁ + f ₂ S ₂ ,

The piston 107 moves downward to discharge the discharged water.

When the inside of the case 102 becomes pressurized and the relation of these forces becomes {(D ₁ ² -D ₂ ² ) π / 4} f ₁ + f ₂ + S ₂ ,

The piston 107 moves upwards to stop the discharge of the discharged water,

As the height of the discharged water increases, the relationship between these forces

{(D ₁ ² -D ₂ ² ) π / 4} P + f ₁ + f ₂ (D ₁ ² × π / 4) P ₁ + S ₂

When the piston 107 is moved downward, the discharged water is discharged.

Therefore, when the diameter D ₁ of the enlarged diameter portion 107a of the piston 107 and the diameter D ₂ of the shaft diameter portion 107b are set to satisfy both of these equations, the auto drain formed of the same component is used. By assembling the normally closed spring 123 or the normally open spring 143, the normally closed auto drain or the normally open auto drain can be obtained.

13 shows the structure of the normally sealed auto drain 151 of the seventh embodiment of the present invention. This auto drain 151 has substantially the same configuration as the embodiment shown in FIGS. 8 and 9 except for a manual discharge mechanism that allows manual discharge of the discharged water by a coupling portion provided to the tap water control member and the piston. To have.

The manual discharge mechanism fixes the discharge guide cylinder 153 at the lower end opening of the case 152 by the fastening of the fixing member 154, and the shaft diameter of the manual discharge mechanism is fixed to the fixing member 154 by a groove divided at the inner end thereof. The manual operation member 155 having the coupling portion 156 formed thereon is coupled and detached freely, and the slide guide 157 is inserted into the float guide 157 attached on the discharge guide cylinder 153 in a freely movable state. The piston 158 is provided with a coupling portion 159 that engages with the coupling portion 156 of the manual operation member 155 described above.

The coupling portion 159 is provided at the distal end of the extension portion 160 which is divided by a plurality of divided grooves and extends downward from the piston 158 so as to be able to be reduced in diameter.

The above-mentioned two grooves may be provided only on either the piston 158 or the manual operation member 155. In general, the members for providing the grooves are formed of an elastic material such as synthetic resin, It may be formed of any other material.

The discharge valve body 163 is provided with a discharge valve sheet 162 on the upper inner circumferential surface of the discharge guide cylinder 153 and a seal member for opening and closing the discharge valve sheet 162 on the piston 158. And a guide surface between the discharge water discharge groove 162a and the discharge water discharge groove 162a as described in FIG. 3 on the inner circumferential surface below the discharge valve sheet 162 in the discharge guide cylinder 153. 162b is formed.

In the seventh embodiment, since the above manual discharge mechanism is provided, the manual operation valve like the one installed in the fifth embodiment is not provided. Therefore, the valve guide cylinder 153 is The flange 153a to be integrally formed on the upper portion is directly fixed to the bottom surface of the case 152. In addition, since the auto drain of the seventh embodiment is always sealed, the auto drain is pushed upwards between the discharge guide cylinder 153 and the enlarged diameter portion 158 above the piston 158. The closing spring 165 is installed. Reference numeral 166 in the drawing indicates a so-called one-touch pipe member attached to the tip of the manual operation member 155, but the present invention is not limited thereto and can be connected using a screw.

In the auto drain having the above-described configuration, the piston 158 and the manual operation member 155 are formed of a material such as elastic synthetic resin, and the engaging portions 159 and 156 are pushed against each other. The coupling portion 159 is inserted into the coupling portion 156 of the manual operation member 155 by elasticity, whereby both coupling portions are engageable.

In the case of manually discharging the discharged water, the manual operation member 155 fastened to the fixing member 154 may be rotated in a predetermined direction, whereby the manual operation member 155 moves downward to engage the engaging portion ( Since 156 is coupled to the engaging portion 159 of the piston 158 to move the piston 158 downward, the discharge valve body 163 opens the discharge valve sheet 162 to discharge the discharged water.

When the manual operation member 155 is rotated in the direction opposite to the above direction, the piston 158 is moved upward by the spring tension of the normally closed spring 165, so that the discharge of the discharged water is stopped.

The manual discharge of the discharged water by the manual operation member 155 is discharged through the discharged water discharge groove 162a in which the discharged water is automatically discharged, and is different from the discharge of the discharged water by opening and closing a separately formed manual discharge path. Since there is no blockage of the grooves or adhesion of the sealing member, the discharged water can be discharged reliably. In addition, since only the engaging portions 159 and 156 are provided in the piston 158 and the manual operation member 155, the number of parts is small and the configuration is simple.

Further, the lowering stroke of the manual operation member 155 is shorter than the downward movement stroke of the piston 158, and the engagement of the manual operation member 155 and the fixing member 154 is not exceeded by the downward movement limit of the piston 158. If it is made to release, the damage of the engagement part provided in the manual control member and a piston is prevented.

In the seventh embodiment described above, other configurations and operations are substantially different from those in the fifth embodiment. Therefore, the same or corresponding parts are given the same reference numerals, and the description thereof is omitted.

14 shows the eighth embodiment of the present invention, and this auto drain 171 is provided with a separate always-opening spring in place of the normally closed spring in the seventh embodiment, and is always open-type auto drain. Consists of. That is, the normally closed spring 165 of the auto drain 151 of the seventh embodiment is removed, and the piston 158 is disposed between the partition wall 172 of the piston 158 and the float guide 173. The normally open spring 175 is pushed downward is installed.

Incidentally, except for the spring described above, the same configuration as that of the auto drain 151 is made, and the same components are formed. Accordingly, since the sixth embodiment is also the same as the difference with respect to the fifth embodiment, the difference between the seventh embodiment and the seventh embodiment is given the same reference numerals as those in the seventh embodiment or the like, and the detailed description is as follows. Omit.

Claims (7)

A pilot valve is installed in the discharge guide tube at the bottom of the case where the discharged water is stored, and the pilot communicates with the inside of the case through a pilot valve sheet which is opened and closed by the vertical movement of the float installed inside the case. In the auto drain in which the piston driven by the compressed air in the pilot chamber is inserted into the seal, and the discharge valve body for opening / closing the discharge valve sheet is installed in the piston, the discharge valve body 41 is replaced. A plurality of annular seal members are provided on the outer circumferential surface of the piston 40 and a plurality of inner surfaces of the discharge guide cylinder 33 move when the discharge valve body 41 opens the discharge valve sheet 34. A discharge water discharge groove 34a is provided, and a guide surface 34b for guiding the discharge valve body 11 is provided between the discharge water discharge grooves 34a, and the diameter of the guide surface 34b is discharged. Bit 34 is the auto drain, characterized in that the same or as large as the diameter of the. A pilot chamber communicating with the inside of the case by installing a discharge valve sheet for discharging the discharge water in the discharge guide tube at the bottom of the case where the discharged water is stored, and opening and closing the pilot valve by opening and closing the float installed in the case. In the auto drain in which the piston driven by the compressed air in the pilot chamber is inserted, and the discharge valve body for opening and closing the discharge valve sheet is installed in the piston, the discharge valve sheet 34 is described above. The discharge valve body is formed by inserting an annular seal member into an inner surface of one discharge guide cylinder 33, and wherein the seal member abuts when the discharge valve body 41 opens the discharge valve sheet 34. 41) A plurality of discharge water discharge grooves 34a are provided on the circumferential surface, and a guide surface 34b is provided between the discharge water discharge grooves 34a for the seal member, and the guide surface 34b of the guide surface 34b is provided. An auto drain, characterized in that the diameter is equal to or smaller than the diameter of the discharge valve seat. The discharge valve sheet 34 for discharging the discharge water is provided in the discharge guide cylinder 33 at the bottom of the case 32 in which the discharge water is stored, and is connected to the discharge guide cylinder 33. The float guide 38 is guided to the float guide 38 by a free lifting movement, and the piston is inserted into the float guide 38 in a freely movable state, and the pilot chamber is partitioned and formed. In the pilot seat opened in the pilot chamber, the pilot valve body 45 which is driven by the shank-dong of the float 39 and opens and closes it is disposed to face the piston 40. The drain valve body 34 which opens and closes the said discharge valve seat 34 by the sliding movement is provided, The auto drain characterized by the above-mentioned. The discharge valve sheet 34 for discharging the discharge water is provided in the discharge guide cylinder 33 at the bottom of the case 32 in which the discharge water is stored, and connected to the discharge guide cylinder 33. In addition to inducing the float 39 to the float guide 38 in a free lifting motion, the piston is inserted into the float guide 38 in a freely movable state, and the pipe chamber is partitioned and formed. In the pilot seat opened in the pilot chamber, the pilot valve body 45 which is driven by the shanghai-dong of the float 39 and opens and closes it is arranged to face the piston 40, and And a discharge valve body (34) for opening and closing the discharge valve seat (34) by sliding. The constant closing spring of claim 3, wherein the discharge valve body 41 pushes the piston 40 in the direction in which the discharge valve seat 41 closes the discharge valve seat 34 between the discharge guide cylinder 33 and the piston 40. The direction in which the discharge valve body 41 opens the discharge valve seat 34 between the float guide 38 and the piston 40 in the pilot chamber 42 while providing the valve seat. Auto spring, characterized in that for installing the spring seat of the normally open spring for pushing the piston (40), and the normally closed spring or the normally open spring can be selectively mounted. 2. The manual control member (36) according to claim 1, wherein a coupling part that is mutually engageable is provided to the piston (40) holding the discharge valve body (41) and the manual control member (36) inserted into the discharge guide cylinder (33). The downward movement of the piston (40) enables downward movement for opening of the discharge valve seat (34). The coupling part which can be mutually couple | bonded with the piston 40 which holds the discharge valve body 41, and the manual operation member 36 inserted into the discharge guide cylinder 33 is provided, and the manual operation member of Claim 3 or 5 below. The downward movement of the piston (36) enables the piston (40) to move downward for the opening of the discharge valve seat (34).