CN112361054B

CN112361054B - Automatic recirculation low pressure pump protection valve

Info

Publication number: CN112361054B
Application number: CN202011244443.7A
Authority: CN
Inventors: 胡国先; 戴小名; 余承善
Original assignee: Jiangsu Datian Valve Manufacturing Co ltd
Current assignee: Jiangsu Datian Valve Manufacturing Co ltd
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2022-07-15
Anticipated expiration: 2040-11-10
Also published as: CN112361054A

Abstract

The invention relates to the technical field of pump protection valves and discloses an automatic recycling low-pressure pump protection valve which comprises a valve seat, a valve cover and a bypass pipe, wherein the lower end of the valve seat is fixedly connected with a first flange, the upper end of the valve cover is fixedly connected with a second flange, one end, far away from the valve seat, of the bypass pipe is fixedly connected with a third flange, the valve cover is fixedly connected to the upper end of the valve seat, the upper end of the valve seat is fixedly connected with a first connecting plate, the lower end of the valve cover is fixedly connected with a second connecting plate corresponding to the first connecting plate, a plurality of U-shaped fixing plates are uniformly clamped outside the first connecting plate and the second connecting plate, and clamping grooves clamped with the U-shaped fixing plates are formed in the opposite sides of the first connecting plate and the second connecting plate. This automatic recirculation low pressure pump protection valve possesses the quick assembly disassembly that can realize between disk seat and the valve gap and the quick assembly disassembly between disk seat and the bypass pipe, the advantage of being convenient for maintain the use.

Description

Automatic recirculation low pressure pump protection valve

Technical Field

The invention relates to the technical field of pump protection valves, in particular to an automatic recirculation low-pressure pump protection valve.

Background

The automatic recirculation valve is also called a pump protection valve or a minimum flow valve, is used for automatic recirculation of the minimum flow of the centrifugal pump, prevents the damage of the centrifugal pump caused by overheating, noise and vibration under low load, and is a pump protection device. It automatically protects the centrifugal pump (especially for conveying hot water medium) from partial cavitation damage and instability which may occur in the pump body when the centrifugal pump is in low-load operation.

The connecting positions of the existing automatic recycling low-pressure pump protection valve are complicated and inconvenient to connect, great inconvenience is brought to installation, disassembly and maintenance, the actual using effect is influenced, and the actual requirement cannot be well met.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides an automatic recycling low-pressure pump protection valve which has the advantages of being capable of realizing quick assembly and disassembly between a valve seat and a valve cover and between the valve seat and a bypass pipe, and being convenient to maintain and use, and solves the problems that the existing automatic recycling low-pressure pump protection valve is complex and inconvenient in connection of all connecting positions, great inconvenience is brought to installation, disassembly and maintenance, the actual use effect is influenced, and the actual requirements cannot be well met.

(II) technical scheme

In order to realize the quick assembly and disassembly between the valve seat and the valve cover and the quick assembly and disassembly between the valve seat and the bypass pipe, and facilitate the maintenance and the use, the invention provides the following technical scheme: an automatic recycling low-pressure pump protection valve comprises a valve seat, a valve cover and a bypass pipe, wherein a first flange is fixedly connected to the lower end of the valve seat, a second flange is fixedly connected to the upper end of the valve cover, a third flange is fixedly connected to the end, away from the valve seat, of the bypass pipe, the valve cover is fixedly connected to the upper end of the valve seat, a first connecting plate is fixedly connected to the upper end of the valve seat, a second connecting plate corresponding to the first connecting plate is fixedly connected to the lower end of the valve cover, a plurality of U-shaped fixing plates are uniformly clamped outside the first connecting plate and the second connecting plate, clamping grooves clamped with the U-shaped fixing plates are formed in the opposite sides of the first connecting plate and the second connecting plate, fixing shafts are fixedly connected to the opposite sides of the U-shaped fixing plates, a rotating plate is rotatably sleeved outside the fixing shafts, inserting holes are formed in the surface of the rotating plate, and limiting inserting rods are movably inserted in the inserting holes, the surfaces of the first connecting plate and the second connecting plate are respectively provided with a limiting slot correspondingly inserted with the limiting insertion rod, one end of the limiting insertion rod is fixedly connected with a limiting pulling plate, and one opposite side of the limiting pulling plate and one opposite side of the rotating plate are fixedly connected with a limiting spring sleeved outside the limiting insertion rod;

the one end fixedly connected with first connection spiral shell of bypass pipe, the lateral wall of disk seat sets up the connection screw with first connection spiral shell accordant connection, the fixed positioning pressure plate of crimping outside the disk seat that has cup jointed of one end outer wall of bypass pipe, the outer wall fixedly connected with cover of disk seat is at the solid fixed cylinder outside the positioning pressure plate, the outer wall longitudinal symmetry fixedly connected with of disk seat is two cardboards that are located the solid fixed cylinder upside, two many direction slide bars of fixedly connected with between the cardboard, many the outer sliding connection of direction slide bar has same L shape crimping board, L shape crimping board crimping is outside positioning pressure plate.

Preferably, the lower extreme fixedly connected with annular seal piece of second connecting plate, the annular seal groove of pegging graft is seted up with annular seal piece matching to the upper end of first connecting plate, the outer wall cladding of annular seal piece has one deck sealing rubber pad.

Preferably, the lower end of the valve cover is fixedly connected with a second connecting screw cylinder which is in threaded connection with the inner wall of the upper end of the valve seat.

Preferably, one end of the fixed shaft is fixedly connected with an anti-drop plate positioned on the outer side of the rotating plate.

Preferably, one end of the fixing cylinder is fixedly connected with a U-shaped clamping plate sleeved outside the L-shaped crimping plate, the side wall of the U-shaped clamping plate is provided with a jack, a clamping rod is inserted into the jack in a movable manner, a clamping groove in corresponding insertion connection with the clamping rod is formed in the surface of the L-shaped crimping plate, one end of the clamping rod is fixedly connected with a clamping pull plate, and the clamping pull plate and the U-shaped clamping plate are fixedly connected with the same clamping spring sleeved outside the clamping rod towards one side.

Preferably, the surface of the positioning pressing plate is coated with a layer of damping rubber pad.

Preferably, one side of each of the two ends of the U-shaped fixing plate is provided with an inclined surface.

Preferably, at least three U-shaped fixing plates are arranged.

(III) advantageous effects

Compared with the prior art, the invention provides an automatic recirculation low-pressure pump protection valve, which has the following beneficial effects:

1. this automatic low pressure pump protection valve recycles, through disk seat and the valve gap that is equipped with, when connecting disk seat and valve gap, utilize the screw connection effect of second connection screw section of thick bamboo and disk seat upper end inner wall to make the valve gap be in the same place with the quick fixed connection of disk seat, first connecting plate and second connecting plate closely laminate this moment, the leakproofness of first connecting plate and second connecting plate is made good to the cooperation of annular seal piece and annular seal groove, the joint effect of rethread U-shaped fixed plate and draw-in groove makes the joint that the U-shaped fixed plate is firm realize the firm spacing connection between the two outside first connecting plate and second connecting plate, make disk seat and valve gap be in the same place fast fixed connection, the rotation connection effect of rethread fixed axle and commentaries on classics board rotates the commentaries on classics board, make spacing inserted bar aim at spacing slot, spacing spring draws back spacing arm-tie, the firm of U-shaped fixed plate and first connecting plate and second connecting plate connection can be realized in spacing inserted bar impels spacing slot with spacing inserted bar to spacing arm-tie Connect, can realize the quick assembly disassembly between disk seat and the valve gap, be convenient for install maintain the use.

2. This automatic low-pressure pump protection valve recycles, through the bypass pipe that is equipped with, utilize the threaded connection effect of first connection screw and first connection screw to make between bypass pipe and the disk seat high-speed joint be in the same place, the firm crimping of positioning pressure plate is sealed the protection in fixed cylinder this moment, the sliding connection effect of rethread guide slide bar and L shape crimping board makes L shape crimping board remove to positioning pressure plate's the outside and carries out spacing protection to positioning pressure plate, the vertical portion of L shape crimping board passes in the U-shaped chucking board this moment, when the chucking pole is aimed at the chucking groove, chucking spring pull-back chucking arm-tie, chucking arm-tie impels the chucking pole to realize the chucking inslot can realize the firm spacing to L shape crimping board, can realize the quick dismouting between disk seat and the bypass pipe, convenient to maintain and use.

Drawings

FIG. 1 is a schematic diagram of a protective valve for an automatic recirculation low pressure pump according to the present invention;

FIG. 2 is an enlarged view of a portion A of the protection valve for an automatic recirculation low pressure pump of FIG. 1 according to the present invention;

FIG. 3 is an enlarged view of a portion B of the protective valve for an automatic recirculation low pressure pump of FIG. 1 according to the present invention;

fig. 4 is a partial structure enlarged view of the portion C in fig. 3 of the automatic recirculation low pressure pump protection valve according to the present invention.

In the figure: 1 valve seat, 2 valve covers, 3 by-pass pipes, 4 first flanges, 5 second flanges, 6 third flanges, 7 first connecting plates, 8 second connecting plates, 9U-shaped fixing plates, 10 clamping grooves, 11 fixing shafts, 12 rotating plates, 13 limiting insertion rods, 14 limiting insertion grooves, 15 limiting pull plates, 16 limiting springs, 17 first connecting screw cylinders, 18 connecting screw holes, 19 positioning pressing plates, 20 fixing cylinders, 21 clamping plates, 22 guiding sliding rods, 23L-shaped pressing plates, 24 second connecting screw cylinders, 25U-shaped clamping plates, 26 clamping rods, 27 clamping grooves, 28 clamping pull plates and 29 clamping springs.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, an automatic recycling low pressure pump protection valve comprises a valve seat 1, a valve cover 2 and a bypass pipe 3, wherein a first flange 4 is fixedly connected to the lower end of the valve seat 1, a second flange 5 is fixedly connected to the upper end of the valve cover 2, a third flange 6 is fixedly connected to one end of the bypass pipe 3 away from the valve seat 1, the valve cover 2 is fixedly connected to the upper end of the valve seat 1, a first connecting plate 7 is fixedly connected to the upper end of the valve seat 1, a second connecting plate 8 corresponding to the first connecting plate 7 is fixedly connected to the lower end of the valve cover 2, a plurality of U-shaped fixing plates 9 are uniformly clamped outside the first connecting plate 7 and the second connecting plate 8, clamping grooves 10 clamped with the U-shaped fixing plates 9 are respectively formed on one side of the first connecting plate 7 and the second connecting plate 8, fixing shafts 11 are respectively fixedly connected to two opposite sides of the U-shaped fixing plates 9, a rotating plate 12 is rotatably sleeved outside the fixing shafts 11, the surface of the rotating plate 12 is provided with jacks, limit inserting rods 13 are movably inserted in the jacks, the surfaces of the first connecting plate 7 and the second connecting plate 8 are provided with limit slots 14 correspondingly inserted with the limit inserting rods 13, one end of each limit inserting rod 13 is fixedly connected with a limit pull plate 15, and one opposite side of each limit pull plate 15 and the rotating plate 12 is fixedly connected with a same limit spring 16 sleeved outside the corresponding limit inserting rod 13;

the first connecting screw section of thick bamboo 17 of one end fixedly connected with of bypass pipe 3, the connection screw 18 with first connecting screw section of thick bamboo 17 accordant connection is seted up to the lateral wall of disk seat 1, the fixed positioning pressure plate 19 of crimping outside disk seat 1 that has cup jointed of the one end outer wall of bypass pipe 3, the outer wall fixedly connected with cover of disk seat 1 is overlapped a fixed section of thick bamboo 20 outside positioning pressure plate 19, two cardboard 21 that are located fixed section of thick bamboo 20 upside of outer wall longitudinal symmetry fixedly connected with of disk seat 1, many direction slide bars 22 of fixedly connected with between two cardboard 21, many direction slide bars 22 outer sliding connection have same L shape crimping board 23, L shape crimping board 23 crimping is outside positioning pressure plate 19.

The lower extreme fixedly connected with annular seal piece of second connecting plate 8, the annular seal groove of pegging graft is seted up with annular seal piece matching to the upper end of first connecting plate 7, and the outer wall cladding of annular seal piece has one deck sealing rubber pad.

The lower end of the valve cover 2 is fixedly connected with a second connecting screw cylinder 24 which is in threaded connection with the inner wall of the upper end of the valve seat 1.

One end of the fixed shaft 11 is fixedly connected with an anti-drop plate positioned outside the rotating plate 12.

The one end fixedly connected with card cover of a fixed section of thick bamboo 20 is at the outer U-shaped chucking plate 25 of L shape crimping board 23, the lateral wall of U-shaped chucking plate 25 has been seted up the jack and the jack internalization is inserted and is equipped with chucking pole 26, the surface of L shape crimping board 23 is seted up the chucking groove 27 that corresponds the grafting with chucking pole 26, the one end fixedly connected with chucking arm-tie 28 of chucking pole 26, chucking arm-tie 28 and U-shaped chucking plate 25 are the same one side fixedly connected with of one side fixedly connected with cover establish chucking spring 29 outside chucking pole 26.

The surface of the positioning pressing plate 19 is coated with a layer of damping rubber pad.

One side of each of two ends of the U-shaped fixing plate 9 is provided with an inclined surface.

At least three U-shaped fixing plates 9 are provided.

To sum up, the automatic recycling low pressure pump protection valve has the advantages that through the valve seat 1 and the valve cover 2, when the valve seat 1 and the valve cover 2 are connected, the valve cover 2 is quickly and fixedly connected with the valve seat 1 by utilizing the threaded connection effect of the second connecting screw cylinder 24 and the inner wall of the upper end of the valve seat 1, the first connecting plate 7 is tightly attached to the second connecting plate 8, the sealing performance of the first connecting plate 7 and the second connecting plate 8 is good due to the matching of the annular sealing block and the annular sealing groove, the U-shaped fixing plate 9 is stably clamped outside the first connecting plate 7 and the second connecting plate 8 through the clamping effect of the U-shaped fixing plate 9 and the clamping groove to realize stable limit connection between the two, the valve seat 1 and the valve cover 2 can be quickly and fixedly connected together, the rotating plate 12 is rotated through the rotating connection effect of the fixing shaft 11 and the rotating plate 12, so that the limit inserting rod 13 is aligned with the limit slot 14, the limiting spring 16 pulls back the limiting pulling plate 15, the limiting pulling plate 15 pushes the limiting insertion rod 13 into the limiting slot 14 to realize the stable connection of the U-shaped fixing plate 9 with the first connecting plate 7 and the second connecting plate 8, the quick assembly and disassembly between the valve seat 1 and the valve cover 2 can be realized, the installation, maintenance and use are convenient, the bypass pipe 3 is arranged through the bypass pipe 3, the bypass pipe 3 is quickly connected with the valve seat 1 by utilizing the threaded connection action of the first connecting screw barrel 17 and the first connecting screw hole 18, the positioning pressing plate 19 is stably pressed and connected in the fixing barrel 20 for sealing protection at the moment, the L-shaped pressing plate 23 is moved to the outer side of the positioning pressing plate 19 by utilizing the sliding connection action of the guide sliding rod 22 and the L-shaped pressing plate 23 to carry out the limiting protection on the positioning pressing plate 19, at the moment, the vertical part of the L-shaped pressing plate 23 passes through the U-shaped clamping plate 25, when the clamping rod 26 is aligned with the clamping groove 27, the clamping spring 29 pulls back the clamping pull plate 28, the clamping pull plate 28 pushes the clamping rod 26 into the clamping groove 27, the L-shaped compression joint plate 23 can be stably limited, the valve seat 1 and the bypass pipe 3 can be quickly disassembled and assembled, and the maintenance and the use are convenient.

It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an automatic low pressure pump protection valve recycles, includes disk seat (1), valve gap (2) and bypass pipe (3), the first flange of lower extreme fixedly connected with (4) of disk seat (1), the upper end fixedly connected with second flange (5) of valve gap (2), one end fixedly connected with third flange (6), its characterized in that of disk seat (1) are kept away from in bypass pipe (3): the valve cover (2) is fixedly connected to the upper end of the valve seat (1), the upper end of the valve seat (1) is fixedly connected with a first connecting plate (7), the lower end of the valve cover (2) is fixedly connected with a second connecting plate (8) corresponding to the first connecting plate (7), the first connecting plate (7) and the second connecting plate (8) are uniformly connected with a plurality of U-shaped fixing plates (9) in a clamped mode, clamping grooves (10) connected with the U-shaped fixing plates (9) are formed in one sides, back to back, of the first connecting plate (7) and the second connecting plate (8), of the U-shaped fixing plates (9) are fixedly connected with fixing shafts (11) in two sides, back to back, of the U-shaped fixing plates (9), the fixing shafts (11) are rotatably sleeved with rotating plates (12), jacks are formed in the surfaces of the rotating plates (12), limiting insertion rods (13) are movably inserted in the jacks, and limiting insertion grooves (14) correspondingly inserted with the limiting insertion rods (13) are formed in the surfaces of the first connecting plate (7) and the second connecting plate (8) One end of the limiting inserted rod (13) is fixedly connected with a limiting pulling plate (15), and one side, opposite to the rotating plate (12), of the limiting pulling plate (15) is fixedly connected with a limiting spring (16) sleeved outside the limiting inserted rod (13);

the one end fixedly connected with of bypass pipe (3) connects screw (17) first, the lateral wall of disk seat (1) is seted up and is connected screw (18) with first connection screw (17) accordant connection, the one end outer wall of bypass pipe (3) is fixed to be cup jointed crimping outside disk seat (1) positioning pressure plate (19), the outer wall fixedly connected with cover of disk seat (1) is at fixed cylinder (20) outside positioning pressure plate (19), the outer wall longitudinal symmetry fixedly connected with of disk seat (1) is two cardboard (21) that are located fixed cylinder (20) upside, two many direction slide bars (22) of fixedly connected with between cardboard (21), many the outer sliding connection of direction slide bar (22) has same L shape crimping board (23), L shape crimping board (23) crimping outside positioning pressure plate (19).

2. An automatic recirculation low pressure pump protection valve as claimed in claim 1, wherein: the lower extreme fixedly connected with annular seal piece of second connecting plate (8), the annular seal groove of pegging graft is seted up with annular seal piece matching in the upper end of first connecting plate (7), the outer wall cladding of annular seal piece has one deck sealing rubber pad.

3. The automatic recirculation low pressure pump protection valve of claim 1, wherein: the lower end of the valve cover (2) is fixedly connected with a second connecting screw cylinder (24) which is in threaded connection with the inner wall of the upper end of the valve seat (1).

4. An automatic recirculation low pressure pump protection valve as claimed in claim 1, wherein: one end of the fixed shaft (11) is fixedly connected with an anti-drop plate positioned at the outer side of the rotating plate (12).

5. The automatic recirculation low pressure pump protection valve of claim 1, wherein: the one end fixedly connected with card cover of solid fixed cylinder (20) is U-shaped chucking plate (25) outside L shape crimping board (23), the lateral wall of U-shaped chucking plate (25) has been seted up jack and jack internalization and has been inserted and be equipped with chucking pole (26), chucking groove (27) of pegging graft are seted up with chucking pole (26) correspondence to the surface of L shape crimping board (23), the one end fixedly connected with chucking arm-tie (28) of chucking pole (26), chucking arm-tie (28) and U-shaped chucking plate (25) are the same cover of one side fixedly connected with and are established chucking spring (29) outside chucking pole (26) in one side.

6. An automatic recirculation low pressure pump protection valve as claimed in claim 1, wherein: the surface of the positioning pressing plate (19) is coated with a layer of damping rubber pad.

7. The automatic recirculation low pressure pump protection valve of claim 1, wherein: one sides of two ends of the U-shaped fixing plate (9) are both provided with inclined planes.

8. An automatic recirculation low pressure pump protection valve as claimed in claim 1, wherein: at least three U-shaped fixing plates (9) are arranged.