KR100797549B1 - Union flowing backward prevention valve for water meter - Google Patents

Abstract

A union check valve for a water meter is provided to improve reliability of the water meter by maintaining an accurate operation of the check valve. A union check valve for a water meter includes a valve housing(12), a valve cover(14), an opening/closing member(16), and a support packing(18). The valve housing includes a water flow hole(12a), a groove(12b), and a guide groove edge, and a coupling protrusion. The valve cover includes a coupling step(14a), a shaft guide hole(14b), one or more water discharge holes(14c), and screw shaped pieces(14d). The opening/closing member has a valve body(16a) and a guide shaft(16b), and is provided with a compression spring(S) around the guide shaft so as to elastically slide in the shaft guide hole of the valve cover. The support packing is mounted on the guide groove edge of the valve housing.

Description

Union flowing backward prevention valve for water meter

1 is a perspective view showing a separate non-return valve applied to a conventional union pipe for water meter,

Figure 2 is a longitudinal sectional view showing a state in which the conventional non-return valve is assembled,

Figure 3 is a perspective view showing the separated backflow check valve applied to the union pipe for water meters according to the present invention,

Figure 4 is a longitudinal sectional view showing a state in which the non-return valve is assembled in the present invention,

5 is a partially enlarged view showing in detail the operating state of the portion "A" in Figure 4 according to the present invention,

6 is a front view showing a state in which the blade pieces on the valve cover side according to the present invention are arranged;

◎ Explanation of code for main part of drawing ◎

1: water meter 2: union pipe

10: non-return valve 12: valve housing

12a: plumber 12b: groove

12c: guide groove 12d: coupling protrusion

14: valve cover 14a: coupling jaw

14b: shaft guide hole 14c: water discharge hole

14d: wing piece 16: opening and closing member

16a: valve body 16b: guide shaft

18: Support Packing

The present invention relates to a union non-return valve for a water meter, and more particularly, it is installed in a union pipe (connecting pipe) installed from a water supply pipe on the main body side of a water meter to prevent reverse rotation of a vane member of a water meter due to a reverse flow of water. In preventing the non-return valve, it is possible to prevent the foreign substances, etc. generated by the water flow to be caught in the elements constituting the non-return valve as possible to ensure accurate measurement.

In general, water meters that have been installed and used so far have not been provided with a structural device to prevent backflow and dipping inside the meter. Because of this, due to natural backflow or artificial backflow of the tap water, the vane member is reversed, and each measuring part linked with the vane member is also reversed, so that the meter cannot be accurately measured, such as being turned upside down. It was.

Therefore, the backflow prevention valve is installed in the main body of the water meter to prevent backflow, but as shown in FIG. 1 and FIG. 2 attached to the narrow installation space limit for the inner area of the water meter, the water meter ( The connecting pipe 2 is screwed horizontally through the joint nut N provided from the water supply pipe side of 1) and the joint nut N, and the backflow prevention valve 100 is installed in the connection pipe 2. do.

When the configuration of the non-return valve 100 installed in the connecting pipe 2 is examined as described above, an insertion groove 101a is formed on the inner circumference in a ring shape, and the packing material is installed from the end of the connecting pipe 2. And a rim portion 201 having a predetermined diameter is formed in the insertion groove 101a of the packing material 101 so as to guide the outer circumference thereof, and a protruding jaw 203 having a water passage 202 in the center thereof. ) Is formed in the housing cover 210, and the edge portion 301 of the same diameter as the edge portion 201 of the housing cover 210 to be guidely supported by the insertion groove (101a) of the packing material 101 body ( It is formed in 310a, a plurality of wing pieces 302 formed on the one side from the body 310a and as the wing piece 302 is formed, a plurality of water discharge hole 303 is formed, the wing piece 302 mutually A housing case 310 in which a shaft guide hole 304 is provided at an inner center of the body 310a to be connected, and a shaft in the housing case 310. A valve body in which an airtight packing 402 is coupled to a front end side of the shaft rod 401 guided to the depot 304 and integrally formed from the shaft rod 401 to open and close the water passage 202 of the housing cover 210. 403, and the opening and closing member 410 made of a compression spring (S) is provided from the shaft rod 401 to give elasticity.

When the conventional non-return valve 100 configured as described above is cut off at the water supply headquarters side, the action of the non-return valve installed in the connection pipe 2 of the water meter 1 is made.

That is, the opening and closing member 410 installed in the housing cover 210 and the housing case 310 is typically a valve body 403 of the opening and closing member 410 according to the water supply to the water supply hole 202 of the housing cover 210. It can be opened to supply water to the supplier through the water discharge hole (203).

On the other hand, if the stage is made, as the restoring force of the compression spring (S) installed in the shaft rod 401, the valve body 403 again blocks the water passage 202 of the housing cover to prevent water from flowing back to the water meter 1 side. Prevents errors in measurement.

Here, the airtight packing 402 provided in the valve body 403 blocks the inclined portion of the water passage 202.

In the conventional water meter 1 having the above-described action, in the water flow according to the water supply, when the scale, moss (shape accumulated foreign matter), etc. occurs internally, foreign matter contained in such fine water is supplied Foreign matter generated inside the pipe side is gradually caught in the component parts of the non-return valve 100 is deposited.

As the finely deposited portion, the airtight packing 402 formed on the valve body 403 of the opening and closing member 410, the shaft rod 401, the shaft guide hole 304, the wing piece 302 of the housing case 310 It occurs on the back.

In the case where the foreign matter is gradually deposited as described above, there is no malfunction rate of the non-return valve due to water pressure in the process of continuously supplying tap water, but in the process of blocking the tap water supply, the above-mentioned foreign matter is constituted of the non-return valve. There was a problem that the reverse flow pressure blocking is not properly made by inhibiting the operation of the urea.

That is, the airtight packing should be closely adhered to the valve body portion, but there is a possibility that a gap may occur due to the accumulation of foreign matters, and foreign matters caught in the shaft may interfere with the operation of the compression spring. The reorganization has a straight shape, which also causes the operation deterioration, such as the accumulation of foreign matters caught in the contact area of the wing piece, and eventually causes the overall malfunction of the non-return valve.

The non-return valve operated by the foreign matters as described above has a problem that the reliability is low because accurate measurement is not made.

The present invention has been invented for various problems as described above, is installed in the union pipe (connecting pipe) that is installed from the main body side water supply pipe of the water meter to prevent the reverse rotation of the vane member of the water meter due to the back flow of water In the prevention valve, an object of the present invention is to prevent the foreign matters generated by the water flow from being caught in the elements constituting the backflow prevention valve as much as possible so that accurate measurement can be made.

According to the present invention for achieving the above object, the union pipe is detachably installed in accordance with the fastening of the joint nut from the water supply pipe side of the water meter, and the reverse flow is installed in the union pipe to prevent the reverse flow generated when the water supply is blocked In the prevention valve, a step for guiding and supporting the non-return valve is formed on the inner diameter of the union pipe, the non-return valve is a diameter that is guided in the diameter of the union pipe, the through-hole is formed in the center, the outside A circumference is provided with a groove into which an o-ring can be inserted so as to be tightly supported in the union tube, and a guide groove jaw is formed from the inside of the water passage, and a coupling protrusion is formed at an inner circumference; A coupling jaw that can guide and engage the coupling protrusion is formed at the outer circumference, and an axial guide hole is formed at the inner center, and a plurality of wing pieces having a screw shape as well as the formation of at least one water discharge hole at the outer circumference are integrally formed. A valve cover formed; In addition to the formation of a conical valve body to be guided and supported by the water supply hole of the valve housing, a cross-shaped guide shaft is integrally formed at the center of one side thereof, and a compression spring is installed from the guide shaft to provide a shaft guide of the valve cover. An opening and closing member elastically installed in a sliding type with respect to the ball; Union backflow for water meter is installed in the guide groove of the valve housing is composed of a ring-shaped support packing having a hollow U-shaped cross-sectional area from one side to block or release the inclined front portion of the valve body by resilient support from the through hole This is achieved by providing a prevention valve.

Hereinafter, the present invention will be described in detail with reference to FIGS. 3 to 6.

Attached Figure 3 is a perspective view showing a separate check the non-return valve applied to the union pipe for water meter according to the present invention, Figure 4 is a longitudinal cross-sectional view showing a state in which the check valve is assembled in the present invention, Figure 5 4 is a partially enlarged view showing in detail the operating state of the portion "A" in Figure 4 according to the present invention, Figure 6 is a front view showing a state in which the blade pieces on the valve cover side according to the present invention is arranged.

According to the present invention, the union pipe (2) is detachably installed in accordance with the fastening of the joint nut (N) from the water supply pipe side of the water meter (1), and is installed in the union pipe (2) to be generated when the water supply is blocked. In the non-return valve 10 to prevent the back flow,

On the inner diameter of the union pipe (2) is formed a step (2a) for guiding and supporting the non-return valve. The step 2a is such that the end of the blade piece 14d on the valve cover 14 side, which will be described later, is caught and supported.

The non-return valve 10 is largely divided into a valve housing 12, a valve cover 14, opening and closing member 16 and the support packing 18.

The valve housing 12 is a diameter guided within the diameter of the union pipe (2) is formed in the center through the hole (12a), the outer circumference of the O-ring (R) can be inserted in close contact with the union pipe The groove 12b is formed, the guide groove jaw 12c is formed from the inside of the water passage 12a, and the engaging protrusion 12d is formed at the inner circumference.

The valve cover 14 has a coupling jaw 14a formed at the outer circumference thereof, and the shaft guide hole 14b is formed at the inner center, and the at least one outer circumference thereof. In addition to the formation of the water discharge hole 14c, a plurality of wing pieces 14d having a screw shape are integrally formed.

The coupling protrusion 12d on the side of the valve housing 12 and the coupling jaw 14a on the side of the valve cover 14 form a relatively thin thickness of the inner diameter of the valve housing and the valve cover, which are made of a plastic material. It is to be combined into a hooking type.

The opening / closing member 16 is integrally formed with a conical valve body 16a so as to be guided and held by the water passage 12a of the valve housing 12, and a cross-shaped guide shaft 16b is integrally formed at one center thereof. It is formed, the compression spring (S) is provided from the guide shaft (16b) is elastically installed in the sliding type with respect to the shaft guide hole (14b) of the valve cover (14).

The support packing 18 is a ring shape having a hollow U-shaped cross-sectional area from one side thereof is mounted on the guide groove jaw 12c of the valve housing 12.

This is a type in which the inclined front portion of the valve body 16a in contact with the inner diameter side thereof is elastically received from the water hole 12a by blocking the water hole or buffered from the water hole due to the characteristics of the hollow support packing 18. It can be released.

Referring to the operation and effects on the union check valve of the present invention configured as described above are as follows.

In the union pipe (2) fastened to the male screw portion formed on the water supply pipe side of the water meter (1), the non-return valve (10) installed in the union pipe (2) is normally opened as a hydraulic action in the tap water supply state, In the singular state, it is blocked so that accurate measurement is made by not affecting the rotation of the vane installed inside the water meter.

The opening / closing member 16 of the non-return valve 10 is opened so that the valve body 16a is spaced apart from the support packing 18 provided on the guide groove 12c of the water passage 12a of the valve housing 12. In this state, the water passing through the pipe body of the water meter 1 passes through the water hole 12a of the valve housing 12, and the water passing through the water hole 12a is opened and closed. It is possible to use tap water as a way of exiting from the water discharge hole 14c of the valve cover after passing through.

The valve housing 12 installed in the inner diameter of the union tube 2 is influenced by the O-ring R inserted into the groove 12b of the outer circumference thereof, so that water passes only through the water passage 12a. .

When the non-return valve 10 is opened as described above, the cross-shaped guide shaft 16b which is a component of the opening / closing member 16 is pushed to the rear of the shaft guide hole 14b of the valve cover 14. In this state, the compression spring S installed on the guide shaft 16b maintains the compressed state.

Water exiting through the water discharge hole (14c) as described above is guided through the wing piece (14d) is passed, wherein the water is formed as a screw shape, as shown in Figure 6 attached to the wing piece (14d) Therefore, the passage is made more smoothly while forming the vortex.

As the water passes through the vortex as described above, it is possible to minimize the adhesion of the foreign matter to be caught in the blade-shaped blade applied to the conventional non-return valve.

In other words, the water passing through at a high flow rate is the same as the principle that the moss is not caught.

On the other hand, in the state where the water supply is cut off or the stage is cut off, the opening / closing member 16 provided in the valve housing 12 and the valve cover 14 has a low water pressure and at the same time returns the compression spring S as a valve body ( 16a is a state in which the inclined front part is in close contact with the support packing 18 provided in the guide groove jaw 12c on the side of the water hole 12a, and the guide shaft is slid from the shaft guide hole 14b. By blocking), backflow can be prevented.

In the opening and closing member 16 sliding as described above, the guide shaft 16b is formed in a cross-shaped cross-sectional area to minimize the area contacted from the shaft guide hole 14b to prevent the trapping of foreign matter. To be.

As a result, the basic operation of the non-return valve of the present invention is the same as the conventional one, but the shape of the wing piece having a curvature on the valve cover side and the cross-shaped guide shaft prevents the backflow of foreign matter easily. The advantage is to keep the valve running smoothly.

On the other hand, the operation of the valve body (16a) of the opening and closing member 16 is supported when the front end portion is in contact with or spaced apart from the support packing (18) of the water supply hole (12a) side as shown in FIG. The packing 18 is elastic because of the hollow U-shape, and thus, foreign matter adhesion is not easy due to the effect of shaking off foreign matters.

 Therefore, the reverse flow blocking state due to the contact of the valve body 16a can be made without a gap, so that the function of the reverse flow blocking effect is maintained for a long time.

As described above, the union check valve of the water meter of the present invention has a cross-cross shape in the component of the check valve, which is elastically contacted and separated from the support packing on the side of the water supply hole in contact with the valve body, and the guide shaft of the opening / closing member. By minimizing the contact area from the shaft guide hole by having a cross-sectional area, and by forming the wing piece on the valve cover side to have a screw shape, it prevents the adhesion of foreign substances that gradually occurs due to the water flow in the pipe. It is possible to increase the reliability of using a water meter by implementing a measurement that could not be accurately measured according to the reverse flow cutoff of the water meter.

Claims (1)

Union pipe (2) which is detachably installed in accordance with the fastening of the joint nut (N) from the water supply pipe side of the water meter (1), and is installed in the union pipe (2) to prevent the reverse flow generated when the water supply is blocked In the non-return valve 10, On the inner diameter of the union pipe (2) is formed a step (2a) for guiding and supporting the non-return valve, the non-return valve 10 is in the center with a diameter guided within the diameter of the union pipe (2) A through hole 12a is formed, and a groove 12b through which the O-ring R can be inserted is formed in the outer circumference thereof so as to be tightly supported in the union tube, and the guide groove jaw (from the inside of the through hole 12a) is formed. 12c) and a valve housing 12 having a coupling protrusion 12d formed on an inner circumference thereof; Coupling jaw (14a) is guided to the coupling protrusion (12d) is formed in the outer circumference, the inner axial guide hole (14b) is formed, the outer circumference of the one or more water discharge hole (14c) A valve cover 14 formed integrally with a plurality of wing pieces 14d having a screw shape; In addition to the formation of the conical valve body 16a to be guided and supported by the water supply hole 12a of the valve housing 12, a cross-shaped guide shaft 16b is integrally formed at one center thereof, and a guide shaft ( An opening / closing member (16) installed from the compression spring (S) and elastically installed in a sliding type with respect to the shaft guide hole (14b) of the valve cover (14); It is installed in the guide groove jaw (12c) of the valve housing 12 has a hollow U-shaped cross-sectional area from one side so as to elastically support the inclined front portion of the valve body (16a) from the water supply hole (12a) to block or release it Union check valve for water meter, characterized in that consisting of a ring-shaped support packing (18).

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