CN212001405U

CN212001405U - Water supply equipment overpressure protection device

Info

Publication number: CN212001405U
Application number: CN202020244439.XU
Authority: CN
Inventors: 谢慧旭
Original assignee: Shanghai Ocean Pump Valve Manufacturing Co ltd
Current assignee: Shanghai Ocean Pump Valve Manufacturing Co ltd
Priority date: 2020-03-03
Filing date: 2020-03-03
Publication date: 2020-11-24
Anticipated expiration: 2030-03-03

Abstract

The utility model discloses an overpressure protection device for water supply equipment, which comprises a pressure relief tank, a water body output pipeline and a water delivery main pipe; a second water pipe is arranged between the water supply main pipe and the pressure relief tank, an overpressure protection mechanism is arranged on the second water pipe, the overpressure protection mechanism comprises a joint pipeline, an overflowing cavity is arranged in the joint pipeline, and a water inlet pipeline and a water outlet pipeline which are communicated with the overflowing cavity are respectively arranged on the joint pipeline; the joint pipe is provided with a limit stroke cavity corresponding to the inner port of the water inlet pipe, a piston block is arranged in the limit stroke cavity, the inner side of the piston block is connected with a plug block which extends out of the limit stroke cavity and plugs the inner port of the water inlet pipe through a connecting block, an end cover is arranged at the opening, a thread cylinder is arranged on the end cover, and a screw rod which extends into the limit stroke cavity is arranged on the thread cylinder. The utility model discloses a set up superpressure protection mechanism and to carrying out the pipeline and let out the flow step-down, effectively avoided the digital pressure meter to become invalid, and cause the pipeline to take place superpressure and explode a tub phenomenon.

Description

Water supply equipment overpressure protection device

Technical Field

The utility model relates to a water supply equipment technical field, in particular to water supply equipment superpressure protection device.

Background

The frequency converter in the frequency conversion constant-pressure water supply control cabinet is mainly utilized to change the frequency of an output power supply according to the feedback response of a pressure signal so as to adjust the rotating speed of a water pump, thereby keeping the water supply pressure constant. A digital pressure gauge is installed in the water supply equipment and used for detecting the water outlet pressure of the pump, so that the feedback of a pressure signal is realized. Once the digital pressure gauge fails, the pressure judgment is directly abnormal, and the pump group can run at full speed to cause tube explosion and cause accidents. Therefore, it is an urgent need to solve the problem of the industry to develop an overpressure protection device capable of preventing the occurrence of a pipe explosion accident under the condition of failure of a digital pressure gauge.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a water supply equipment superpressure protection device. The utility model discloses a set up superpressure protection mechanism and to carrying out the pipeline and let out the flow step-down, effectively avoided the digital pressure meter to become invalid, and cause the pipeline to take place superpressure and explode a tub phenomenon.

The technical scheme of the utility model: a water supply equipment overpressure protection device comprises a pressure relief tank, a water body output pipeline and a water delivery main pipe, wherein the water body output pipeline comprises a connecting pipe connected with the water delivery main pipe through a plurality of first water pipes; a second water pipe is arranged between the water supply main pipe and the pressure relief tank, an overpressure protection mechanism is arranged on the second water pipe, the overpressure protection mechanism comprises a joint pipeline, an overflowing cavity is arranged in the joint pipeline, and a water inlet pipeline and a water outlet pipeline which are communicated with the overflowing cavity are respectively arranged on the joint pipeline; be equipped with the spacing stroke chamber that corresponds with the inner port of inlet channel on the joint line, the spacing stroke intracavity is equipped with the piston piece, and the inboard of piston piece is connected with the chock that stretches out spacing stroke chamber and stopper inlet channel inner port through the connecting block, the outer tip in spacing stroke chamber is uncovered, and uncovered department is equipped with the end cover, be equipped with a screw thread section of thick bamboo on the end cover, be equipped with the screw rod that stretches into spacing stroke intracavity portion on the screw thread section of thick bamboo, the interior tip of screw rod rotates and is equipped with the ejector pad, is equipped with pressure spring between ejector pad and the piston piece, the outside of piston piece is equipped with the sealing block, is equipped with multichannel O type sealing washer on the.

In the overpressure protection device of the water supply equipment, the two ends of the compression spring are respectively provided with the anti-abrasion washers.

In the overpressure protection device for the water supply equipment, the push block is provided with a vent hole.

In the overpressure protection device for the water supply equipment, a groove is formed in the outer end portion of the push block, a limiting rotating head extending into the groove is arranged at the end portion of the screw rod, and a limiting sealing ring is arranged on the outer side, located in the groove, of the push block.

In the overpressure protection device for the water supply equipment, the plug block is provided with a convex block, and an arc-shaped groove matched with the convex block is formed in the port of the water inlet pipeline.

In the overpressure protection device of the water supply equipment, the radius of the chock block is smaller than that of the limit stroke cavity.

In the overpressure protection device for the water supply equipment, the outer ends of the water inlet pipeline and the water outlet pipeline are respectively provided with a flange, and the water inlet pipeline and the water outlet pipeline are respectively connected with the second water pipe through the flanges.

In the overpressure protection device for the water supply equipment, a liquid level alarm is arranged in the pressure relief tank.

In the overpressure protection device for the water supply equipment, the outer end of the screw rod is provided with a rotating handle.

In the overpressure protection device for the water supply equipment, the water inlet pipeline is communicated with the water supply main pipe through the second water pipe, and the water outlet pipeline is communicated with the upper part of the pressure relief tank through the second water pipe.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model discloses and send water to be responsible for the interior water pressure is higher, and superpressure protection mechanism opens under hydraulic oppression this moment, and water pressure promotes chock and inlet channel separation, then produces the intake clearance between chock and the inlet channel, utilizes the intake clearance to carry out the earial drainage step-down, and when water pressure is normal, under compression spring's elastic action, the chock closely laminated with the inner port of inlet channel comes to close the inlet channel, has realized that the superpressure earial drainage in-process is automatic to be opened and close. By adopting the overpressure protection mechanism, the piston block moves along the limit stroke cavity in the working process to play a role in limiting and fixing, thereby limiting and fixing the chock, ensuring that the chock cannot shake when the chock is impacted by water flow, ensuring accurate butt joint with the inner port of the water inlet pipeline, wherein, the back side of the piston block is provided with a sealing block which is provided with a plurality of O-shaped sealing rings, the sealing block and the O-shaped sealing rings are utilized for sealing, thereby avoiding overflow water from being generated outwards by the overflowing cavity through the limit stroke cavity, and the length of the screw rod extending into the limit stroke cavity can be adjusted to push the push block to move along the limit stroke cavity so as to adjust the compression degree of the compression spring, and then the starting pressure of the overpressure protection mechanism is adjusted to meet the requirement of being applied to pipelines with different pressure values. When the digital pressure gauge detects that the water pressure is too low, the booster pump works to pump the water body in the pressure relief tank into the water supply main pipe, so that the water pressure can normally supply water.

2. The utility model discloses well pressure spring's both ends are equipped with the abrasionproof packing ring respectively, have played the effect of abrasionproof, avoid pressure spring to be in the pressure state and cause the damage to ejector pad or sealed piece.

3. The utility model discloses be equipped with the air vent on the well ejector pad, come to ventilate the cavity between ejector pad and the piston piece, avoid when the piston piece removes along spacing stroke chamber, because the cavity size between ejector pad and the piston piece changes, and produce the atmospheric pressure and change for there is gas to enter into and overflows the chamber or have rivers to enter into spacing stroke intracavity.

4. The utility model discloses in the chock is equipped with convex lug, the port department of inlet channel be equipped with the lug to the arc wall that agrees with, the surface of lug is equipped with the rubber sealing layer, the chock of being convenient for closely laminates with the inlet channel, has better leakproofness.

5. The utility model discloses in the radius of chock is less than the radius in spacing stroke chamber, and the installation is realized in the spacing stroke chamber of accessible, has the characteristics of being convenient for install and dismantling.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a state diagram of the overpressure protection mechanism in operation;

FIG. 3 is a state diagram of a closed state of the overpressure protection mechanism;

FIG. 4 is a schematic view of the hold-down spring;

fig. 5 is a schematic structural view of a limit rotor head.

1. A pressure relief tank; 2. a water body output pipeline; 3. a water delivery main pipe; 4. a connecting pipe; 5. a water conduit; 6. a first water pipe; 8. a booster pump; 10. a pressure gauge; 11. a second water pipe; 12. an overpressure protection mechanism; 13. a joint pipe; 14. a flow-through chamber; 15. a water inlet pipe; 16. a water outlet pipeline; 17. a stroke limiting cavity; 18. a piston block; 19. connecting blocks; 20. a chock block; 21. a threaded barrel; 22. a screw; 23. a push block; 24. a compression spring; 25. a sealing block; 26. an O-shaped sealing ring; 27. an anti-wear washer; 28. a groove; 29. limiting the rotating head; 30. a limiting seal ring; 31. and (4) a flange.

Detailed Description

The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention.

Example (b): the utility model provides a water supply equipment superpressure protection device, as shown in fig. 1-5, is responsible for 3 including pressure release jar 1, water output pipeline 2 and the sending water, be equipped with the liquid level alarm in the pressure release jar 1, the liquid level alarm accessible is commercially available, has obtained extensive application in the life, no longer gives details its concrete structure here, when the water in the pressure release jar 1 is too much, sends out the police dispatch newspaper and reminds the staff, controls the operating power of the water delivery pump on the trunk line, steps down, avoids the pipeline to superpressure for a long time and takes place the tube explosion phenomenon. The water body output pipeline 2 comprises a connecting pipe 4 connected with the water delivery main pipe 3 through a plurality of first water pipes 6, a water guide pipe 5 communicated between the connecting pipe 4 and the bottom of the pressure relief tank 1, and each first water pipe 6 is respectively provided with a booster pump 8; a digital pressure gauge 10 is arranged on the water delivery main pipe 3; as shown in fig. 2 and 3, a second water pipe 11 is arranged between the main water supply pipe 3 and the connecting pipe 4, an overpressure protection mechanism 12 is arranged on the second water pipe 11, the overpressure protection mechanism 12 includes a joint pipe 13, an overflow cavity 14 is arranged in the joint pipe 13, and a water inlet pipe 15 and a water outlet pipe 16 which are communicated with the overflow cavity 14 are respectively arranged on the joint pipe 13; the water inlet pipeline 15 is communicated with the water delivery main pipe through a second water pipe 11, and the water outlet pipeline 16 is communicated with the upper part of the pressure relief tank 1 through the second water pipe. The pressure of the residual water in the pressure relief tank 1 is effectively avoided, so that the overpressure protection mechanism cannot be accurately and timely protected. Be equipped with the spacing stroke chamber 17 that corresponds with port in the inlet channel 15 on the joint pipeline 13, be equipped with piston block 18 in the spacing stroke chamber 17, the inboard of piston block 18 is connected with the chock 20 that stretches out spacing stroke chamber 17 and stopper in the inlet channel 15 through connecting block 19, chock 20 is equipped with convex lug, the port department of inlet channel 15 is equipped with the arc wall to agreeing with the lug, and the surface of lug is equipped with the rubber sealing layer, and the chock 20 of being convenient for closely laminates with the inlet channel 15, has better leakproofness. The radius of the chock block 20 is smaller than that of the stroke limiting cavity 17, installation can be achieved through the stroke limiting cavity 17, and the chock block has the advantages of being convenient to install and detach. The outer end part of the limit stroke cavity 17 is open, an end cover 32 is arranged at the open, the end cover 32 can be fixed on the joint pipeline 13 through bolts, a thread cylinder 21 is arranged on the end cover 32, a screw rod 22 extending into the limit stroke cavity is arranged on the thread cylinder 21, a push block 23 is rotatably arranged at the inner end part of the screw rod 22, a compression spring 24 is arranged between the push block 23 and the piston block 18, and two ends of the compression spring 24 are respectively provided with an anti-abrasion washer 27, so that an anti-abrasion effect is achieved, and the compression spring 24 is prevented from being in a compression state to damage the push block 23 or the sealing block 25. The outer end parts of the water inlet pipeline 15 and the water outlet pipeline 16 are respectively provided with a flange 31, and the water inlet pipeline 15 and the water outlet pipeline 16 are respectively connected with the second water pipe 11 through the flanges 31.

The outside of piston block 18 is equipped with sealed piece 25, is equipped with multichannel O type sealing washer 26 on the sealed piece 25, utilizes sealed piece 25 to play sealed effect, has avoided having the water to spill over from spacing stroke chamber 17. The utility model discloses it is higher to be responsible for 3 interior water pressures when sending water, overpressure protection mechanism 12 is under hydraulic oppression this moment, water pressure promotes chock 20 and intake pipe 15 separation, then produce into water clearance between chock 20 and the intake pipe 15, utilize into water clearance to carry out the earial drainage step-down, when water pressure is normal, under pressure spring 24's elastic action, chock 20 and intake pipe 15's inner port close fitting come to close intake pipe 15, realized that the overpressure earial drainage in-process is automatic to be opened and to be closed. And when the digital pressure gauge 10 detects that the water pressure of the water delivery main pipe 3 is too low, the booster pump 8 works to pump the water body in the pressure relief tank 1 into the water delivery main pipe 3, so that the water pressure can be normally supplied with water. By adopting the overpressure protection mechanism 12, in the working process, the piston block 18 moves along the limit stroke cavity 17 to play a role of limiting and fixing, and further play a role of limiting and fixing the plug block 20, so that the plug block 20 does not shake in the process that the plug block 20 is impacted by water flow, thereby ensuring that the plug block can be accurately butted with the inner port of the water inlet pipeline 15, wherein the back side of the piston block 18 is provided with a sealing block 25, the sealing block 25 is provided with a plurality of O-shaped sealing rings 26, the sealing block 25 and the O-shaped sealing rings 26 are used for sealing, the overflow water generated by the overflow cavity 14 through the limit stroke cavity 17 is avoided, the length of the plug block 23 extending into the limit stroke cavity 17 can be adjusted by adjusting the length of the screw rod 22, the push block 23 is pushed to move along the limit stroke cavity 17, the compression degree of the compression spring 24 is adjusted, and further the starting pressure of the overpressure protection mechanism 12 is adjusted, so as to meet the requirements of pipelines applied to different pressure values. Wherein the length that screw rod 22 stretched into in the spacing stroke chamber 17 comes to adjust pressure spring 24's degree of compressing tightly, and then adjusts superpressure protection mechanism 12 start pressure value, and wherein the length that screw rod 22 stretched into in the spacing stroke chamber 17 carries out testing adjustment in the production process of regulating value to start pressure value for screw rod 22 stretches into a start pressure value of length value correspondence, and wherein superpressure protection mechanism 12 start pressure value is the same with the pressure value of setting of digital water pressure gauge 10.

The outer tip of screw rod 22 is equipped with the rotation handle, is convenient for carry out manual regulation and controls the length that screw rod 22 stretched into in the spacing stroke chamber 17, and then adjusts compression spring 24's pressure state, realizes that chock 20 and inlet channel 15 interior port's conflict power size are adjusted.

The outer end of the push block 23 is provided with a groove 28, the end of the screw rod 22 is provided with a limit rotating head 29 extending into the groove 28, and the push block 23 is provided with a limit sealing ring 30 at the outer side of the groove 28, so that the screw rod 22 and the push rod can transmit relative rotation.

The working principle is as follows: the utility model discloses it is higher to be responsible for 3 interior water pressures when sending water, overpressure protection mechanism 12 is under hydraulic oppression this moment, water pressure promotes chock 20 and intake pipe 15 separation, then produce into water clearance between chock 20 and the intake pipe 15, utilize into water clearance to carry out the earial drainage step-down, when water pressure is normal, under pressure spring 24's elastic action, chock 20 and intake pipe 15's inner port close fitting come to close intake pipe 15, realized that the overpressure earial drainage in-process is automatic to be opened and to be closed. And when the digital pressure gauge 10 detects that the water pressure of the water delivery main pipe 3 is too low, the booster pump 8 works to pump the water body in the pressure relief tank 1 into the water delivery main pipe 3, so that the water pressure can be normally supplied with water. By adopting the overpressure protection mechanism 12, in the working process, the piston block 18 moves along the limit stroke cavity 17 to play a role of limiting and fixing, and further play a role of limiting and fixing the plug block 20, so that the plug block 20 does not shake in the process that the plug block 20 is impacted by water flow, thereby ensuring that the plug block can be accurately butted with the inner port of the water inlet pipeline 15, wherein the back side of the piston block 18 is provided with a sealing block 25, the sealing block 25 is provided with a plurality of O-shaped sealing rings 26, the sealing block 25 and the O-shaped sealing rings 26 are used for sealing, the overflow water generated by the overflow cavity 14 through the limit stroke cavity 17 is avoided, the length of the plug block 23 extending into the limit stroke cavity 17 can be adjusted by adjusting the length of the screw rod 22, the push block 23 is pushed to move along the limit stroke cavity 17, the compression degree of the compression spring 24 is adjusted, and further the starting pressure of the overpressure protection mechanism 12 is adjusted, so as to meet the requirements of pipelines applied to different pressure values.

Claims

1. A water supply equipment overpressure protection device comprises a pressure relief tank (1), a water body output pipeline (2) and a water delivery main pipe (3), wherein the water body output pipeline (2) comprises a connecting pipe (4) connected with the water delivery main pipe (3) through a plurality of first water pipes (6), a water guide pipe (5) is connected between the connecting pipe (4) and the bottom of the pressure relief tank (1), each first water pipe (6) is respectively provided with a booster pump (8), and the water delivery main pipe (3) is provided with a digital pressure gauge (10); the method is characterized in that: a second water pipe (11) is arranged between the main water supply pipe (3) and the pressure relief tank (1), an overpressure protection mechanism (12) is arranged on the second water pipe (11), the overpressure protection mechanism (12) comprises a joint pipeline (13), an overflowing cavity (14) is arranged in the joint pipeline (13), and a water inlet pipeline (15) and a water outlet pipeline (16) which are communicated with the overflowing cavity (14) are respectively arranged on the joint pipeline (13); a limit stroke cavity (17) corresponding to the inner port of the water inlet pipeline (15) is arranged on the joint pipeline (13), a piston block (18) is arranged in the limit stroke cavity (17), the inner side of the piston block (18) is connected with a plug block (20) which extends out of the limit stroke cavity (17) and plugs the inner port of the water inlet pipeline (15) through a connecting block (19), the outer end part of the limit stroke cavity (17) is open, an end cover (32) is arranged at the opening, a thread cylinder (21) is arranged on the end cover (32), a screw rod (22) extending into the limit stroke cavity is arranged on the thread cylinder (21), a push block (23) is rotatably arranged at the inner end part of the screw rod (22), a compression spring (24) is arranged between the push block (23) and the piston block (18), the outside of piston block (18) is equipped with sealed piece (25), is equipped with multichannel O type sealing washer (26) on sealed piece (25).

2. Water supply installation overpressure protection arrangement according to claim 1, characterized in that: and two ends of the compression spring (24) are respectively provided with an anti-abrasion gasket (27).

3. Water supply installation overpressure protection arrangement according to claim 1, characterized in that: the push block (23) is provided with a vent hole.

4. Water supply installation overpressure protection arrangement according to claim 1, characterized in that: the outer end of the push block (23) is provided with a groove (28), the end of the screw rod (22) is provided with a limit rotating head (29) extending into the groove (28), and the push block (23) is provided with a limit sealing ring (30) on the outer side of the groove (28).

5. Water supply installation overpressure protection arrangement according to claim 1, characterized in that: the chock (20) is provided with a circular arc-shaped convex block, an arc-shaped groove matched with the convex block is formed in the port of the water inlet pipeline (15), and a rubber sealing layer is arranged on the surface of the convex block.

6. Water supply installation overpressure protection arrangement according to claim 1, characterized in that: the radius of the chock (20) is smaller than that of the limit stroke cavity (17).

7. Water supply installation overpressure protection arrangement according to claim 1, characterized in that: the outer end parts of the water inlet pipeline (15) and the water outlet pipeline (16) are respectively provided with a flange (31), and the water inlet pipeline (15) and the water outlet pipeline (16) are respectively connected with the second water pipe (11) through the flanges (31).

8. Water supply installation overpressure protection arrangement according to claim 1, characterized in that: and a liquid level alarm is arranged in the pressure relief tank (1).

9. Water supply installation overpressure protection arrangement according to claim 1, characterized in that: the outer end part of the screw rod (22) is provided with a rotating handle.

10. Water supply installation overpressure protection arrangement according to claim 1, characterized in that: the water inlet pipeline (15) is communicated with the water delivery main pipe through a second water pipe (11), and the water outlet pipeline (16) is communicated with the upper part of the pressure relief tank (1) through the second water pipe.