Pressure relief connector

Abstract

The utility model provides a pressure relief connector, and belongs to the technical field of pipeline pressure relief. The problem that normal pressure relief cannot be achieved in cold weather is solved. The pressure relief connector comprises a body, the body comprises a columnar pressure relief part with an inner hole, a pressure relief mechanism is arranged in the inner hole of the pressure relief part, the body further comprises a straight-pipe-shaped connecting part, the pressure relief part is integrally and fixedly connected to the side portion of the connecting part, the pressure relief part and the connecting part are communicated, an anti-freezing piece is arranged outside the body, and the anti-freezing piece comprises a first anti-freezing part fixed outside the pressure relief part in a wrapping mode. The anti-freezing pressure relief valve has the advantages of being capable of effectively preventing freezing in cold weather to ensure normal pressure relief and the like.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline pressure relief technology and relates to a pressure relief connector. Background Technology

[0002] As is well known, when the pressure inside a pipeline increases, it is necessary to release the pressure in a timely manner, otherwise the pipeline may rupture. To address this, Chinese patent application number 201822149347.9 discloses a discharging explosion-proof safety valve, which includes a valve body with an internal flow channel. The flow channel includes an inlet for fluid inflow, an outlet for fluid outflow, and a control chamber connecting the inlet and outlet. A shoulder is formed at the junction of the control chamber and the outlet. A pressure relief assembly for opening and closing the flow channel is installed inside the control chamber. The pressure relief assembly includes a push rod connected inside the control chamber, a valve core slidably connected inside the control chamber, and a spring set inside the control chamber. When the valve core abuts against the push rod, the inlet connects to the outlet. The spring applies a spring force to the valve core, causing the valve core to press against the shoulder. The valve comprises a piston, a sealing rod, and a second spring. The piston has a first groove on its outlet-facing end and a second groove on its inlet-facing end. A water passage hole connecting the first and second grooves is located inside the piston. An annular contact ring is provided on the inner wall of the second groove facing the inlet. Several side holes connecting the second groove are provided on the side wall of the piston at the inlet. The sealing rod includes an integrally formed response section and a pressing section. The response section passes through the water passage hole and is opposite to a push rod. The pressing section is slidably connected inside the second groove, and a sealing element for sealing the water passage hole is provided on the side wall of the pressing section. The second spring applies a thrust to the sealing element, causing the sealing element to seal the water passage hole. In use, the unloading safety explosion-proof valve is installed on a pipeline. Fluid inside the pipeline enters the inlet and contacts the side wall of the piston. Due to the pressure of the fluid inside the pipeline, during the use of this unloading safety explosion-proof valve, the fluid at the inlet applies a thrust to the piston pointing towards the outlet. Under the action of this thrust, the piston moves towards the outlet, while simultaneously, the first spring located inside the control chamber is continuously compressed. When the piston moves to the point where the sealing rod inside it contacts the push rod, the push rod restricts the movement of the sealing rod. As the piston continues to move towards the outlet side, a gap is created between the sealing ring and the contact ring. At this time, some of the fluid at the inlet enters the water passage through the second groove, and some enters the water passage through the side hole. Then, the fluid inside the water passage flows into the control chamber under pressure and is finally discharged from the outlet to relieve pressure.

[0003] When the weather is cold, the ambient temperature around the pipeline is low, and the explosion-proof safety valve, like the pipeline, will freeze, causing the internal pressure relief mechanism to stop working. This will cause the pressure relief function to fail, resulting in the internal pressure of the frozen pipeline being unable to be released, which may lead to rupture. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a pressure relief connector that solves the problem of inability to properly relieve pressure in cold weather.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A pressure relief connector includes a body, the body including a columnar pressure relief part having an inner hole, the inner hole of the pressure relief part being provided with a pressure relief mechanism, characterized in that the body also includes a straight pipe-shaped connecting part, the pressure relief part being integrally fixed to the side of the connecting part and the two being connected, and the body being provided with an antifreeze component, the antifreeze component including a first antifreeze part covering and fixed outside the pressure relief part.

[0007] In this pressure relief connector, an antifreeze component is provided outside the main body. The antifreeze component includes a first antifreeze part that covers and fixes the pressure relief part outside the main body, thereby forming antifreeze protection for the pressure relief mechanism inside the main body. This ensures that the freezing rate at the antifreeze part is slower than at other locations inside the pipe, and that the pressure relief mechanism inside the pressure relief part can still work normally when the water inside the pipe begins to gradually freeze and expand, increasing the pressure inside the pipe. This allows the pressure inside the pipe to be reduced by releasing pressure outward to prevent the pipe from bursting.

[0008] Furthermore, the main body of this pressure relief connector also includes a cylindrical connecting part, and the pressure relief part is integrally fixed to the side of the connecting part. This structure does not affect normal pressure relief, and at the same time, the two ends of the connecting part can be directly connected between two pipe fittings, eliminating the need to open threaded connection holes on the side of the pipe fittings for installation and fixing, as is required for the unloading explosion-proof safety valve mentioned in the background art.

[0009] In the aforementioned pressure relief connector, the antifreeze component further includes a second antifreeze part that covers and is fixed outside the connecting part. The first antifreeze part and the second antifreeze part are integrally connected, and both ends of the connecting part extend outside the second antifreeze part.

[0010] Water first enters the connecting part and then the pressure relief part. At the same time, the water begins to freeze at the position close to the wall. By setting the antifreeze component to include a second antifreeze part that covers and fixes the connecting part, the freezing speed of the water in the connecting part can be slowed down, so as to ensure that water pressure can be smoothly applied to the pressure relief part.

[0011] In the aforementioned pressure relief connector, an end cap is fixedly connected to the outer end of the pressure relief part. The end cap has a pressure relief hole along the axial direction of the pressure relief part. A circular mounting part protrudes from the center area of ​​the inner top wall of the end cap. The pressure relief hole communicates with the center hole of the mounting part. The mounting part is threadedly connected to the inner end of the pressure relief part. The edge of the end cap abuts against the outer end of the first antifreeze part, and the outer peripheral wall of the end cap is flush with the outer peripheral wall of the first antifreeze part.

[0012] After installation, the end cap's edge abuts against the outer end of the first antifreeze part, and the outer peripheral wall of the end cap is flush with the outer peripheral wall of the first antifreeze part, which improves the overall integrity of the pressure relief connector.

[0013] In the aforementioned pressure relief connector, the antifreeze component is a rubber component.

[0014] The plastic material has a certain degree of cold resistance, which allows this pressure relief connector to freeze more slowly than other parts of the pipeline. During production, it can be directly molded from the body using injection molding.

[0015] In the aforementioned pressure relief connector, the pressure relief mechanism includes a piston, a sealing rod, a small spring, a small spring seat, a large spring, a large spring seat, and a push rod. The piston is slidably disposed within the pressure relief section along the axial direction. The inner end of the piston has a concave cavity. The small spring seat is threadedly connected to the concave cavity and has several first water passage holes along the axial direction of the pressure relief section. The piston has a flow passage hole along the axial direction of the pressure relief section, which communicates with the concave cavity. The sealing rod passes through the concave cavity. The two ends of the small spring abut against the small spring seat and the sealing rod, respectively, and the sealing element seals the inner end of the flow passage hole under the elastic force of the small spring. The large spring seat is threadedly connected to the pressure relief section near the outer end. The push rod is fixedly connected to the large spring seat and coaxially disposed with the sealing rod. The two ends of the large spring abut against the large spring seat and the piston, respectively. The large spring seat has several second water passage holes along the axial direction of the pressure relief section.

[0016] The pressure of the water flowing into this pressure relief connector acts on the piston. When the water pressure is less than the spring force, the piston will not move. When the pressure increases, the piston moves towards the outer end of the pressure relief section under the action of the water pressure. During this process, the sealing rod remains stationary and continues to block the inner end of the flow passage. When the piston moves to the point where the sealing rod abuts against the push rod, because the position of the push rod is fixed, the sealing rod is held in place and no longer moves with the piston. However, the piston still moves, which opens the inner end of the flow passage. A portion of the water flowing into this pressure relief connector will then be discharged outwards sequentially through the first water passage, the flow passage, the second water passage, and the pressure relief hole, thereby achieving pressure relief.

[0017] In one of the aforementioned pressure relief connectors, the push rod is threadedly connected to the large spring seat. The inner end of the push rod has an annular shoulder on its outer side, and a protective spring is provided on the outer sleeve of the push rod. The two ends of the protective spring abut against the annular shoulder and the large spring seat, respectively.

[0018] In practice, the length of the threaded connection between the push rod and the large spring seat is relatively short. By setting an annular shoulder on the outer side of the inner end of the push rod and installing a protective spring on the outer sleeve of the push rod, with the two ends of the protective spring abutting against the annular shoulder and the large spring seat respectively, the inner end of the push rod can be protected, preventing the sealing rod from bending the inner end of the push rod during pressure relief.

[0019] In the aforementioned pressure relief connector, one end of the connecting part is fitted with a union nut, and an annular mounting groove is provided on the outer side of this end of the connecting part. A limiting spring is provided in the annular mounting groove, and the union nut is axially limited between the limiting spring and the pressure relief part.

[0020] The addition of a union nut allows for a flexible connection of this pressure relief connector, making it particularly suitable for direct connection to a water meter.

[0021] Compared with existing technologies, this pressure relief connector has an antifreeze component installed outside the main body. The first antifreeze part of the antifreeze component wraps around and is fixed to the pressure relief part of the main body, and the second antifreeze part of the antifreeze component wraps around and is fixed to the connection part of the main body. This forms an antifreeze protection for the main body, so that the freezing rate at this pressure relief connector is slower than other parts in the pipeline. This ensures that the pressure relief mechanism inside the pressure relief part can still work normally when the water inside the pipeline begins to freeze and expand, increasing the pressure inside the pipeline. In this way, the pressure inside the pipeline can be reduced by releasing pressure outward to avoid pipeline rupture. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of the pressure relief connector.

[0023] Figure 2 This is a three-dimensional schematic diagram of the pressure relief connector.

[0024] In the figure, 1. Body; 1a. Pressure relief part; 1b. Connecting part; 2. End cap; 2a. Pressure relief hole; 2b. Mounting part; 3. Antifreeze part; 3a. First antifreeze part; 3b. Second antifreeze part; 4. Limiting snap ring; 5. Union nut; 6. Piston; 6a. Flow hole; 7. Sealing rod; 8. Small spring; 9. Small spring seat; 9a. First water passage hole; 10. Large spring; 11. Large spring seat; 11a. Second water passage hole; 12. Push rod; 12a. Annular shoulder; 13. Sealing ring; 14. Protective spring. Detailed Implementation

[0025] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0026] like Figure 1 and Figure 2As shown, a pressure relief connector includes a body 1, which includes a columnar pressure relief portion 1a with an inner hole. A pressure relief mechanism is provided within the inner hole of the pressure relief portion 1a. An end cap 2 is fixedly connected to the outer end of the pressure relief mechanism. The end cap 2 has a pressure relief hole 2a along the axial direction of the pressure relief portion 1a. An antifreeze component 3 is provided outside the body 1. The antifreeze component 3 includes a first antifreeze portion 3a that covers and is fixed to the outside of the pressure relief portion 1a. A circular mounting portion 2b protrudes from the center region of the inner top wall of the end cap 2, extending beyond the edge of the end cap 2. The pressure relief hole 2a communicates with the center hole of the mounting portion 2b, and the mounting portion 2b is threadedly connected to the outer end of the pressure relief portion 1a. The edge of the end cap 2 abuts against the outer end of the first antifreeze portion 3a, and the outer peripheral wall of the end cap 2 is flush with the outer peripheral wall of the first antifreeze portion 3a.

[0027] Furthermore, such as Figure 1 and Figure 2 As shown, the main body 1 also includes a straight tubular connecting part 1b, and a pressure relief part 1a is integrally fixed to the side of the connecting part 1b and the two are connected. The antifreeze component 3 also includes a second antifreeze part 3b that covers and is fixed outside the connecting part 1b. The first antifreeze part 3a and the second antifreeze part 3b are integrally fixed, and both ends of the connecting part 1b extend outside the second antifreeze part 3b. In practice, the antifreeze component 3 is a rubber part, and the antifreeze component 3 is directly injection molded outside the main body during production. One end of the connecting part 1b is fitted with a union nut 5, and an annular mounting groove is provided on the outer side of this end of the connecting part 1b. A limiting spring 4 is provided in the annular mounting groove, and the union nut 5 is limited along the axial direction of the connecting part 1b between the limiting spring 4 and the pressure relief part 1a. The other end of the connecting part 1b has an external thread.

[0028] In this embodiment, as Figure 1As shown, the pressure relief mechanism includes a piston 6, a sealing rod 7, a small spring 8, a small spring seat 9, a large spring 10, a large spring seat 11, and a push rod 12. The piston 6 is slidably disposed in the pressure relief part 1a along the axial direction. The inner end of the piston 6 is provided with a cavity. The small spring seat 9 is threadedly connected to the cavity and is provided with a plurality of first water passage holes 9a along the axial direction of the pressure relief part 1a. The piston 6 is provided with a flow hole 6a along the axial direction of the pressure relief part 1a. The flow hole 6a communicates with the cavity. The sealing rod 7 passes through the cavity. Inside, the small spring 8 rests against the small spring seat 9 and the sealing rod 7 at both ends, and the sealing element seals the inner end of the flow hole 6a under the elastic force of the small spring 8. The large spring seat 11 is threadedly connected to the pressure relief part 1a near the outer end. The push rod 12 is fixedly connected to the large spring seat 11 and is coaxially arranged with the sealing rod 7. The large spring 10 rests against the large spring seat 11 and the piston 6 at both ends. The large spring seat 11 is provided with several second water passage holes 11a along the axial direction of the pressure relief part 1a. The sealing rod 7 is sleeved with a sealing ring 13. The inner end of the flow hole 6a is outwardly flared, and the sealing ring 13 rests against the inner end wall of the flow hole 6a. In practice, the push rod 12 is threadedly connected to the large spring seat 11. The outer side of the inner end of the push rod 12 has an annular shoulder 12a. The push rod 12 is sleeved with a protective spring 14, and the two ends of the protective spring 14 rest against the annular shoulder 12a and the large spring seat 11 at both ends.

[0029] In use, this pressure relief connector is connected to the rear end of the water meter via the union nut 5. The pressure of the water flowing into this pressure relief connector acts on the piston 6. When the water pressure is less than the elastic force of the large spring 10, the piston 6 will not move. When the pressure increases, the piston 6 moves towards the outer end of the pressure relief part 1a under the action of the water pressure. During this process, the sealing rod 7 remains stationary and continues to block the inner end of the flow hole 6a. When the piston 6 moves to the point where the sealing rod 7 abuts against the push rod 12, because the position of the push rod 12 is fixed, the sealing rod 7 is held in place and no longer moves with the piston 6. However, the piston 6 still moves, which opens the inner end of the flow hole 6a. A portion of the water flowing into this pressure relief connector will then be discharged outwards sequentially through the first water passage 9a, the flow hole 6a, the second water passage 11a, and the pressure relief hole 2a, thereby achieving pressure relief.

[0030] In this pressure relief connector, an antifreeze component 3 is installed outside the main body 1. The first antifreeze part 3a of the antifreeze component 3 is wrapped and fixed outside the pressure relief part 1a of the main body 1, and the second antifreeze part 3b of the antifreeze component 3 is wrapped and fixed outside the connecting part 1b of the main body 1. This forms an antifreeze protection for the main body 1, so that the freezing rate at this pressure relief connector is slower than other parts in the pipeline. This ensures that the pressure relief mechanism in the pressure relief part 1a can still work normally when the water inside the pipeline begins to freeze and expand, increasing the pressure inside the pipeline. Thus, the pressure inside the pipeline can be reduced by releasing pressure outward to avoid pipeline rupture. Moreover, the main body 1 of this pressure relief connector also includes a cylindrical connecting part 1b. The pressure relief part 1a is integrally fixed to the side of the connecting part 1b. This structure does not affect normal pressure relief, and the two ends of the connecting part 1b can be directly connected between two pipe fittings. Unlike the explosion-proof safety valve mentioned in the background art, it does not require threaded connection holes on the side of the pipe fittings for installation and fixation.

[0031] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A pressure relief connector, comprising a body (1), said body (1) including a pressure relief portion (1a) that is columnar and has an inner hole, wherein a pressure relief mechanism is provided in the inner hole of the pressure relief portion (1a), characterized in that, The main body (1) further includes a straight tube-shaped connecting part (1b), and the pressure relief part (1a) is integrally fixed to the side of the connecting part (1b) and the two are connected. The main body (1) is provided with an antifreeze component (3), which includes a first antifreeze part (3a) that covers and is fixed to the outside of the pressure relief part (1a).

2. A pressure relief connector according to claim 1, characterized in that, The antifreeze component (3) further includes a second antifreeze component (3b) that covers and is fixed outside the connecting part (1b). The first antifreeze component (3a) and the second antifreeze component (3b) are integrally connected, and both ends of the connecting part (1b) extend outside the second antifreeze component (3b).

3. A pressure relief connector according to claim 2, characterized in that, An end cap (2) is fixedly connected to the outer end of the pressure relief part (1a). The end cap (2) is provided with a pressure relief hole (2a) along the axial direction of the pressure relief part (1a). A circular mounting part (2b) is provided in the central area of ​​the inner top wall of the end cap (2). The pressure relief hole (2a) is connected to the central hole of the mounting part (2b). The mounting part (2b) is threaded to the inner end of the pressure relief part (1a). The cover edge of the end cap (2) abuts against the outer end of the first antifreeze part (3a), and the outer peripheral wall of the end cap (2) is flush with the outer peripheral wall of the first antifreeze part (3a).

4. A pressure relief connector according to claim 1, 2, or 3, characterized in that, The antifreeze component (3) is a rubber component.

5. A pressure relief connector according to claim 1, 2, or 3, characterized in that, The pressure relief mechanism includes a piston (6), a sealing rod (7), a small spring (8), a small spring seat (9), a large spring (10), a large spring seat (11), and a push rod (12). The piston (6) is slidably disposed in the pressure relief part (1a) along the axial direction. The inner end of the piston (6) is provided with a cavity. The small spring seat (9) is threadedly connected to the cavity and is provided with a plurality of first water passage holes (9a) along the axial direction of the pressure relief part (1a). The piston (6) is provided with a flow hole (6a) along the axial direction of the pressure relief part (1a). The flow hole (6a) communicates with the cavity. The sealing rod (7) passes through the cavity. Inside the concave cavity, the two ends of the small spring (8) abut against the small spring seat (9) and the sealing rod (7) respectively, and the sealing element seals the inner end of the flow hole (6a) under the elastic force of the small spring (8). The large spring seat (11) is threadedly connected to the pressure relief part (1a) near the outer end. The push rod (12) is fixedly connected to the large spring seat (11) and is coaxially arranged with the sealing rod (7). The two ends of the large spring (10) abut against the large spring seat (11) and the piston (6) respectively. The large spring seat (11) is provided with several second water passage holes (11a) along the axial direction of the pressure relief part (1a).

6. A pressure relief connector according to claim 5, characterized in that, The top rod (12) is threadedly connected to the large spring seat (11). The inner end of the top rod (12) has an annular shoulder (12a) on the outer side. The top rod (12) is covered with a protective spring (14). The two ends of the protective spring (14) abut against the annular shoulder (12a) and the large spring seat (11) respectively.

7. A pressure relief connector according to claim 1, 2, or 3, characterized in that, One end of the connecting part (1b) is fitted with a union nut (5), and an annular mounting groove is provided on the outer side of this end of the connecting part (1b). A limiting snap ring (4) is provided in the annular mounting groove. The union nut (5) is limited along the axial direction of the connecting part (1b) between the limiting snap ring (4) and the pressure relief part (1a).

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