Pressure relief device for long-distance water delivery pipeline

Abstract

The utility model discloses a pressure relief device for a long-distance water pipeline, which relates to the technical field of pipeline pressure relief and comprises a connecting pipe and a water storage tank, the connecting pipe is communicated with a pressure relief pipe and a water return pipe, the other end of the pressure relief pipe and the other end of the water return pipe are both communicated with the water storage tank, a pressure relief component is arranged in the pressure relief pipe, and a water return component is arranged in the water return pipe. The pressure relief assembly comprises a sealing cylinder and a sealing plate which are fixedly installed in the pressure relief pipe, the sealing plate is located between the connecting pipe and the sealing cylinder, a counter bore communicated with the connecting pipe is formed in the side, close to the sealing cylinder, of the sealing plate, a first sealing block is installed in the counter bore in a matched mode, and a first piston is installed in the sealing cylinder in the axial direction in a sliding mode. According to the pressure relief device for the long-distance water conveying pipeline, the pressure relief assembly and the water return assembly are arranged in a matched mode, so that the pressure relief device not only can relieve pressure of the water conveying pipeline, but also can store water discharged after pressure relief and flow back into the water conveying pipeline to supplement pressure to the water conveying pipeline, and therefore the water conveying pipeline can work normally.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline pressure relief, in particular to a long-distance water delivery pipeline pressure relief device. Background Art

[0002] A long-distance water pipeline pressure relief device is disclosed in the Chinese utility model patent application number: CN202120552253.5, the structure of which includes: a pressure relief mechanism and a mounting tube; the pressure relief mechanism is arranged on the mounting tube, the pressure relief mechanism includes a special-shaped plate, the special-shaped plate is fixedly installed in the mounting tube, a conical hole is opened on the special-shaped plate, a conical block is slidably installed in the conical hole, and a sleeve is fixedly installed on the top inner wall of the mounting tube. The long-distance water pipeline pressure relief device, by providing a pressure relief mechanism, realizes automatic pressure relief when the water pressure is too high, prevents the excessive water pressure from damaging the equipment, and avoids damage to the equipment; however, when the device is relieving pressure, a large amount of water will be discharged to the outside, resulting in a waste of water resources.

[0003] Therefore, it is necessary to propose a long-distance water pipeline pressure relief device to solve the above problems. Utility Model Content

[0004] Technical problem to be solved: The purpose of the present invention is to provide a long-distance water pipeline pressure relief device to solve the problem that a large amount of water will be discharged to the outside during pressure relief in the existing long-distance water pipeline pressure relief device proposed in the above-mentioned background technology, thereby causing a waste of water resources.

[0005] Technical solution: To achieve the above purpose, the utility model is implemented through the following technical solutions: a long-distance water pipeline pressure relief device, including a connecting pipe and a water storage tank, the connecting pipe is connected with a pressure relief pipe and a return pipe, the other ends of the pressure relief pipe and the return pipe are connected with the water storage tank, and a pressure relief assembly is provided in the pressure relief pipe, and a return water assembly is provided in the return pipe, the pressure relief assembly includes a sealing cylinder and a sealing plate fixedly installed in the pressure relief pipe, the sealing plate is located between the connecting pipe and the sealing cylinder, a countersunk hole connected to the connecting pipe is opened on the side of the sealing plate close to the sealing cylinder, a first sealing block is matched and installed in the countersunk hole, and a first piston is axially slidably installed in the sealing cylinder; a first slide rod is fixedly installed on the side of the first piston close to the connecting pipe, and the other end of the first slide rod The end passes through the sealing cylinder and is fixedly connected to the first sealing block, the side of the sealing cylinder away from the connecting pipe is connected to the air intake pipe, the other end of the air intake pipe passes through the pressure relief pipe and is fixedly installed with a valve, the pressure relief pipe is fixedly installed with a pressure gauge, and the input end of the pressure gauge is connected to the sealing cylinder; the return water assembly includes a fixing plate and a sealing plate fixedly installed in the return water pipe, a countersunk hole connected to the return water pipe is opened on the side of the sealing plate close to the connecting pipe, a second sealing block is matched and installed in the countersunk hole of the sealing plate, a through hole is opened in the middle part of the fixing plate along the axial direction, a second sliding rod is slidably installed in the through hole, a limiting plate is fixedly installed on one end of the second sliding rod away from the connecting pipe, and the other end is fixedly connected to the second sealing block, and a tension spring is mounted on the second sliding rod between the second sealing block and the fixing plate.

[0006] Preferably, a water pipe is fixedly installed at the bottom of the water storage tank, a three-way pipe is fixedly installed at the other end of the water pipe, and the pressure relief pipe and the return pipe are respectively connected to the other two ports of the three-way pipe.

[0007] Preferably, a plurality of connecting rods are evenly and fixedly mounted on the outer ring surface of the sealing cylinder, and the other ends of the connecting rods are fixedly connected to the pressure relief pipe.

[0008] Preferably, a plurality of fixing rods are evenly fixedly installed on the circumference of the fixing plate, and the other ends of the fixing rods are fixedly connected to the return pipe.

[0009] Preferably, flanges are provided at both ends of the connecting pipe.

[0010] Beneficial effect: Compared with the prior art, the utility model provides a long-distance water pipeline pressure relief device, which has a unique structure and is easy to use. Through the coordinated arrangement of the pressure relief component and the return water component, the device can not only relieve the pressure of the water pipeline, but also store the water discharged by the pressure relief in a water storage tank, which can not only avoid the waste of water resources, but also when the pressure in the water pipeline is lower than the rated pressure, the water stored in the water storage tank will flow back into the water pipeline to replenish the pressure of the water pipeline, thereby allowing the water pipeline to work normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional side view schematic diagram of the structure of the utility model;

[0012] Figure 2 It is a cross-sectional schematic diagram of the structure of the utility model;

[0013] Figure 3 It is a cross-sectional schematic diagram of the pressure relief pipe structure of the utility model.

[0014] In the figure: 1. connecting pipe; 2. water storage tank; 3. pressure relief pipe; 4. sealing cylinder; 5. first sealing block; 6. first piston; 7. first slide rod; 8. air intake pipe; 9. second sealing block; 10. fixing plate; 11. second slide rod; 12. tension spring; 13. pressure gauge; 14. three-way pipe; 15. water supply pipe; 16. return pipe. DETAILED DESCRIPTION

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Embodiment 1: This embodiment 1 provides a long-distance water pipeline pressure relief device, which is directly improved on the existing long-distance water pipeline pressure relief device and has a unique structure. Please refer to Figure 1-3 As shown, it includes a connecting pipe 1 and a water tank 2, the connecting pipe 1 is connected with a pressure relief pipe 3 and a return pipe 16, the other ends of the pressure relief pipe 3 and the return pipe 16 are connected with the water tank 2, and a pressure relief component is provided in the pressure relief pipe 3, and a return pipe 16 is provided in the return pipe 16; there are many ways for the pressure relief pipe 3 and the return pipe 16 to be connected with the water tank 2, for example: a water supply pipe 15 is fixedly installed at the bottom of the water tank 2, a three-way pipe 14 is fixedly installed at the other end of the water supply pipe 15, the pressure relief pipe 3 and the return pipe 16 are respectively connected with the other two ports of the three-way pipe 14, and the water supply pipe 15 is a flexible hose for easy movement.

[0017] The pressure relief assembly includes a sealing cylinder 4 and a sealing plate fixedly installed in the pressure relief pipe 3. The sealing plate is located between the connecting pipe 1 and the sealing cylinder 4. A countersunk hole connected to the connecting pipe 1 is opened on the side of the sealing plate close to the sealing cylinder 4. A first sealing block 5 is matched and installed in the countersunk hole. A first piston 6 is axially slidably installed in the sealing cylinder 4. There are many ways to install the sealing cylinder 4. For example, a plurality of connecting rods are evenly fixedly installed on the outer ring surface of the sealing cylinder 4, and the other end of the connecting rod is fixedly connected to the pressure relief pipe 3. The sealing cylinder 4 is fixed in the pressure relief pipe 3 by using a plurality of connecting rods. On the one hand, the stability of the sealing cylinder 4 can be enhanced, and on the other hand, it can also facilitate the circulation of liquid.

[0018] A first slide bar 7 is fixedly installed on the side of the first piston 6 close to the connecting pipe 1, and the other end of the first slide bar 7 penetrates the sealing cylinder 4 and is fixedly connected to the first sealing block 5. The side of the sealing cylinder 4 away from the connecting pipe 1 is connected with an air intake pipe 8, and the other end of the air intake pipe 8 penetrates the pressure relief pipe 3 and is fixedly installed with a valve. A pressure gauge 13 is fixedly installed on the pressure relief pipe 3, and the input end of the pressure gauge 13 is connected to the sealing cylinder 4; high-pressure gas is filled into the sealing cylinder 4 by using the valve, and the pressure in the sealing cylinder 4 is observed from the pressure gauge 13, which can not only accurately control the output pressure of the pressure relief component, but also when the water pressure in the water pipeline is greater than the rated pressure, the pressure relief component can relieve the pressure of the water pipeline, thereby better protecting the water pipeline. In addition, the output pressure of the pressure relief component can be quickly changed according to different water pipelines, so that the pressure relief component can be suitable for different water pipelines.

[0019] The return water assembly includes a fixed plate 10 and a sealing plate fixedly installed in the return water pipe 16. A countersunk hole connected to the return water pipe 16 is opened on the side of the sealing plate close to the connecting pipe 1. A second sealing block 9 is matched and installed in the countersunk hole of the sealing plate. A through hole is opened in the middle part of the fixed plate 10 along the axial direction. A second slide rod 11 is slidably installed in the through hole. The second slide rod 11 is fixedly installed with a limiting plate at one end away from the connecting pipe 1, and the other end is fixedly connected to the second sealing block 9. A tension spring 12 is mounted on the second slide rod 11 between the second sealing block 9 and the fixed plate 10; there are various ways to install the fixed plate 10, for example: a plurality of fixing rods are evenly fixedly installed on the circumferential side of the fixed plate 10, and the other end of the fixing rod is fixedly connected to the return water pipe 16. The fixed plate 10 is fixed in the return water pipe 16 by using a plurality of fixing rods, which can not only make the fixed plate 10 more firmly fixed, but also will not affect the circulation of the liquid.

[0020] When we use the pressure relief device, we first weld the connecting pipe 1 to the water pipeline, and then use the tee pipe 14 to connect the pressure relief pipe 3 and the return pipe 16 with the water pipeline 15. According to the rated pressure of the water pipeline where the connecting pipe 1 is located, high-pressure gas is filled into the sealing tube 4 through the valve, and the pressure gauge 13 is adjusted to be slightly larger than the rated pressure of the water pipeline. When the pressure in the water pipeline increases due to water hammer or other reasons, the water pressure pushes the first sealing block 5 to separate from the sealing plate, and the water flow in the pipeline can flow into the water storage tank 2 through the pressure relief pipe 3, thereby relieving the pressure of the pipeline and preventing the pipeline from rupture.

[0021] When the pressure in the water pipeline where the connecting pipe 1 is located is lower than the rated pressure, since the water pressure in the water tank 2 is the same as the rated pressure of the water pipeline, the water pressure in the water tank 2 will push the second sealing block 9 to separate from the sealing plate, so that the water in the water tank 2 flows back into the water pipeline through the return pipe 16, helping the water pipeline to return to the normal water pressure level. This design can not only effectively prevent the water pipeline from rupturing due to excessive pressure, but also automatically replenish water when the pipeline pressure is too low to ensure the stable operation of the pipeline. Through precise pressure control and flexible connection methods, the pressure relief device can adapt to various complex water pipeline environments and has good maintainability and expansibility. Example

[0022] The difference between Example 2 and Example 1 is that Figure 1 As shown, flanges are provided at both ends of the connecting pipe 1, and the connecting pipe 1 is fixedly installed on the water pipeline by means of the flanges, so that the connecting pipe 1 can be easily disassembled and repaired.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A long-distance water pipeline pressure relief device, comprising a connecting pipe (1) and a water storage tank (2), wherein the connecting pipe (1) is connected to a pressure relief pipe (3) and a water return pipe (16), the other ends of the pressure relief pipe (3) and the water return pipe (16) are both connected to the water storage tank (2), and a pressure relief component is provided in the pressure relief pipe (3), and a water return component is provided in the water return pipe (16), characterized in that: The pressure relief assembly comprises a sealing cylinder (4) and a sealing plate fixedly mounted in the pressure relief pipe (3); the sealing plate is located between the connecting pipe (1) and the sealing cylinder (4); a countersunk hole communicating with the connecting pipe (1) is provided on a side of the sealing plate close to the sealing cylinder (4); a first sealing block (5) is matched and mounted in the countersunk hole; a first piston (6) is axially slidably mounted in the sealing cylinder (4); a first sliding rod (7) is fixedly mounted on a side of the first piston (6) close to the connecting pipe (1); the other end of the first sliding rod (7) penetrates the sealing cylinder (4) and is fixedly connected to the first sealing block (5); a side of the sealing cylinder (4) away from the connecting pipe (1) is connected to an air intake pipe (8); the other end of the air intake pipe (8) penetrates the pressure relief pipe (3) and is fixedly mounted with a valve; A pressure gauge (13) is fixedly mounted on the pressure relief pipe (3), and an input end of the pressure gauge (13) is connected to the sealing cylinder (4); the return water assembly comprises a fixed plate (10) and a sealing plate fixedly mounted in the return water pipe (16); a countersunk hole connected to the return water pipe (16) is provided on a side of the sealing plate close to the connecting pipe (1); a second sealing block (9) is matched and mounted in the countersunk hole of the sealing plate; a through hole is axially provided in the middle of the fixed plate (10), and a second sliding rod (11) is slidably mounted in the through hole; a limiting plate is fixedly mounted on one end of the second sliding rod (11) away from the connecting pipe (1), and the other end is fixedly connected to the second sealing block (9); a tension spring (12) is sleeved on the second sliding rod (11) between the second sealing block (9) and the fixed plate (10).

2. A long distance water pipeline pressure relief device according to claim 1, characterized in that: A water delivery pipe (15) is fixedly mounted on the bottom of the water storage tank (2); a three-way pipe (14) is fixedly mounted on the other end of the water delivery pipe (15); and the pressure relief pipe (3) and the water return pipe (16) are respectively connected to the other two ports of the three-way pipe (14).

3. A long distance water pipeline pressure relief device according to claim 1, characterized in that: A plurality of connecting rods are evenly and fixedly mounted on the outer ring surface of the sealing cylinder (4), and the other ends of the connecting rods are fixedly connected to the pressure relief pipe (3).

4. A long distance water pipeline pressure relief device according to claim 1, characterized in that: A plurality of fixing rods are evenly fixedly mounted on the circumference of the fixing plate (10), and the other ends of the fixing rods are fixedly connected to the return water pipe (16).

5. A long distance water pipeline pressure relief device according to claim 1, characterized in that: Both ends of the connecting pipe (1) are provided with flanges.

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