Safety relief valve for water

Abstract

The utility model relates to the technical fields of pressure relief valve, especially to the safe pressure relief valve for water, which realizes the cycle of overpressure automatic pressure relief and low pressure sealing pressure preservation, forms double sealing through the structural design of diaphragm and first sealing ring, improves the anti-leakage capacity, reduces the connection loose hidden danger and leakage point through the integration of diaphragm and diaphragm pressure plate assembly, and comprises valve body and pressure relief port, the pressure relief port is connected and is arranged at the bottom of valve body, and the side part of valve body is provided with water inlet, further includes diaphragm pressure plate assembly, valve cover, diaphragm and first sealing ring, the valve cover is installed at the top of valve body, the diaphragm is installed between valve body and valve cover, the first sealing ring is installed in the sealing groove in valve body, and the sealing lip of first sealing ring cooperates with diaphragm, the diaphragm pressure plate assembly is set up on the valve cover, and the diaphragm pressure plate assembly is used for the elastic pressing of diaphragm.

Description

Technical Field

[0001] This utility model relates to the technical field of pressure relief valves, and in particular to a safety pressure relief valve for water use. Background Technology

[0002] In fields such as civil water supply and industrial water treatment, water systems are prone to water pressure fluctuations due to pump start-up and shutdown and sudden changes in water consumption. When the water pressure exceeds the upper limit of the equipment and pipelines, excess water must be quickly discharged through a safety pressure relief valve to maintain stable system pressure.

[0003] Currently, the mainstream pressure relief valves on the market are based on "diaphragm sensing + spring adjustment". However, due to the separate design of "diaphragm-pressure plate-valve stem", they need to be assembled with connecting parts such as bolts and clips. Due to water pressure fluctuations and long-term use, the connecting parts are prone to loosening, resulting in sealing failure and delayed pressure relief response. At the same time, the manual adjustment mechanism lacks an integrated linkage design with the valve stem, resulting in low pressure setting accuracy and cumbersome operation, which cannot meet the water system's requirements for reliable pressure relief and precise adjustment.

[0004] For example, the existing technology announcement number CN202209455U patent relates to an electric safety pressure relief and holding valve, which includes a valve body, a valve cover, a valve assembly, an electric contact pressure gauge, a needle valve, a solenoid valve, a ball valve one, and a ball valve two.

[0005] During the use of existing valve bodies, it was found that the existing pressure relief valve's separate structure is relatively complex, which reduces the reliability of use and makes manual pressure adjustment inconvenient. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a water safety pressure relief valve that realizes automatic pressure relief in case of overpressure and sealing and pressure holding in case of low pressure. Through the structural design of the diaphragm and the first sealing ring, a double seal is formed to improve the anti-leakage capability. Through the integration of the diaphragm and the diaphragm pressure plate assembly, the risk of loose connection is reduced and the number of leakage points is reduced.

[0007] This utility model relates to a water safety pressure relief valve, comprising a valve body and a pressure relief port. The pressure relief port is connected to the bottom of the valve body, and a water inlet is provided on the side of the valve body. It also includes a diaphragm pressure plate assembly, a valve cover, a diaphragm, and a first sealing ring. The valve cover is installed on the top of the valve body, the diaphragm is installed between the valve body and the valve cover, and the first sealing ring is installed in a sealing groove inside the valve body, engaging with the sealing lip of the diaphragm. The valve cover is provided with a diaphragm pressure plate assembly for elastically pressing the diaphragm. The water inlet of the valve body is connected to a water system. In the initial state, the diaphragm pressure plate provides downward elastic pressure on the diaphragm, causing the diaphragm to push against the pressure relief port. The system features end sealing. When the water pressure in the water system exceeds the set value, the water pressure acts on the bottom of the diaphragm and pushes the diaphragm to deform elastically upward. At this time, the bottom of the diaphragm opens with the top of the pressure relief port, allowing water in the water system to be discharged outward through the pressure relief port to relieve pressure. When the water pressure drops below the set value, the diaphragm pressure plate assembly pushes the diaphragm to deform downward and reset, closing the pressure relief port and stopping pressure relief. This achieves a cycle of automatic pressure relief for overpressure and sealing and maintaining pressure for low pressure. Through the structural design of the diaphragm and the first sealing ring, a double seal is formed, improving the anti-leakage capability. The integration of the diaphragm and the diaphragm pressure plate assembly reduces the risk of loose connections and reduces leakage points.

[0008] Preferably, it also includes a top cover, an adjusting screw, a valve stem, and a spring. The top cover is installed on the top opening of the valve cover, the adjusting screw is screwed into the inside of the valve cover, the upper part of the valve stem is installed on the adjusting screw, and the spring is fitted onto the outside of the valve stem. The diaphragm pressure plate assembly includes a first pressing member, a second pressing member, a protrusion, and a notch. The bottom end of the valve stem is inserted into the second pressing member, which is embedded within the first pressing member. The bottom end of the first pressing member contacts the top end of the diaphragm. The protrusion is located at the top end of the diaphragm, and the notch is located in the middle of the first pressing member. The first pressing member is mounted on the protrusion through the notch. By adjusting the screw to limit the top end of the spring, the bottom end of the spring elastically presses the second pressing member downwards, thereby causing the second pressing member to elastically press the diaphragm downwards through the first pressing member, causing the diaphragm to release pressure. The pressure port has a sealed opening at the top. When the pressure in the water system pushes the diaphragm upwards and elastically deforms, the diaphragm compresses the spring through the first and second pressing parts. When the pressure is restored, the spring pushes the diaphragm downwards and elastically deforms to reset. By rotating the adjusting screw and moving it downwards, the adjusting screw increases the compression of the spring, increasing the spring preload and raising the pressure relief setting value. Conversely, it lowers the pressure relief setting value, improving the convenience of manual and precise pressure control. The spring and valve body are coaxially arranged to ensure that the pressure transmission is not offset and improve the pressure relief response speed.

[0009] Preferably, it also includes a handle and a pin, with the handle mounted on the top of the valve stem and the pin passing through the handle and the valve stem; the operator can rotate the valve stem by gripping the handle, improving the convenience of adjusting the spring preload.

[0010] Preferably, it also includes a groove, which is provided on the top of the adjusting screw; by providing a groove, it is convenient for personnel to use tools to rotate and adjust the adjusting screw.

[0011] Preferably, it also includes a second sealing ring, which is disposed between the valve body and the pressure relief port; thereby improving the sealing performance of the connection between the pressure relief port and the valve body.

[0012] Preferably, it also includes bolts, and the valve cover is mounted on the top of the valve body by bolts.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The inlet of the valve body is connected to the water system. In the initial state, the diaphragm pressure plate provides downward elastic pressure on the diaphragm, so that the diaphragm seals the top of the pressure relief port. When the water pressure of the water system exceeds the set value, the water pressure acts on the bottom of the diaphragm and pushes the diaphragm to deform upward elastically. At this time, the bottom of the diaphragm and the top of the pressure relief port open, so that the water in the water system is discharged outward through the pressure relief port to relieve pressure. When the water pressure drops below the set value, the diaphragm pressure plate assembly pushes the diaphragm to deform downward and reset, closing the pressure relief port and stopping the pressure relief. This realizes the cycle of automatic pressure relief for overpressure and sealing and maintaining pressure for low pressure. Through the structural design of the diaphragm and the first sealing ring, a double seal is formed, which improves the anti-leakage capability. Through the integration of the diaphragm and the diaphragm pressure plate assembly, the risk of loose connection is reduced and the leakage points are reduced. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the isometric structure of this utility model; Figure 2 This is an isometric structural diagram of the connection between the valve body and the pressure relief port, etc. Figure 3 This is an isometric structural diagram of the connection between the diaphragm and the first sealing ring, etc. Figure 4 This is an exploded structural diagram of the connection between the adjusting screw and the valve stem, etc. Figure 5 This is an exploded structural diagram showing the connection between the second pressing component and the first pressing component, etc. Figure 6 This is an exploded structural diagram of the connection between the valve body and the valve cover.

[0015] The following are labels in the attached diagram: 1. Valve body; 2. Pressure relief port; 3. Valve cover; 4. Diaphragm; 5. First sealing ring; 6. Top cover; 7. Adjusting screw; 8. Valve stem; 9. Spring; 10. First pressing element; 11. Second pressing element; 12. Protrusion; 13. Notch; 14. Handle; 15. Pin; 16. Groove; 17. Second sealing ring; 18. Bolt. Detailed Implementation

[0016] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0017] Example 1 like Figures 1 to 6 As shown, the water safety pressure relief valve of this utility model includes a valve body 1 and a pressure relief port 2. The pressure relief port 2 is connected to the bottom of the valve body 1, and a water inlet is provided on the side of the valve body 1. It also includes a diaphragm pressure plate assembly, a valve cover 3, a diaphragm 4, and a first sealing ring 5. The valve cover 3 is installed on the top of the valve body 1, the diaphragm 4 is installed between the valve body 1 and the valve cover 3, and the first sealing ring 5 is installed in the sealing groove inside the valve body 1. The first sealing ring 5 cooperates with the sealing lip of the diaphragm 4. The valve cover 3 is provided with a diaphragm pressure plate assembly, which is used to elastically press the diaphragm 4. like Figure 1 and Figure 5 As shown, it also includes a top cover 6, an adjusting screw 7, a valve stem 8, and a spring 9. The top cover 6 is installed on the top opening of the valve cover 3, the adjusting screw 7 is screwed into the inside of the valve cover 3, the upper part of the valve stem 8 is installed on the adjusting screw 7, and the spring 9 is fitted onto the outside of the valve stem 8. The diaphragm plate assembly includes a first pressing member 10, a second pressing member 11, a protrusion 12, and a notch 13. The bottom end of the valve stem 8 is inserted into the interior of the second pressing member 11. The second pressing member 11 is embedded in the first pressing member 10. The bottom end of the first pressing member 10 contacts the top end of the diaphragm 4. The protrusion 12 is located at the top end of the diaphragm 4. The notch 13 is located in the middle of the first pressing member 10. The first pressing member 10 is mounted on the protrusion 12 through the notch 13. In this embodiment, the inlet of the valve body 1 is connected to the water system. In the initial state, the diaphragm pressure plate provides downward elastic pressure to the diaphragm 4, so that the diaphragm 4 seals the top of the pressure relief port 2. When the water pressure of the water system exceeds the set value, the water pressure acts on the bottom of the diaphragm 4 and pushes the diaphragm 4 to deform upward elastically. At this time, the bottom of the diaphragm 4 and the top of the pressure relief port 2 open, so that the water in the water system is discharged outward through the pressure relief port 2 to relieve pressure. When the water pressure drops below the set value, the diaphragm pressure plate assembly pushes the diaphragm 4 to deform downward and reset, closing the pressure relief port 2 and stopping the pressure relief. This realizes the cycle of automatic pressure relief for overpressure and sealing and maintaining pressure for low pressure. Through the structural design of the diaphragm 4 and the first sealing ring 5, a double seal is formed, which improves the anti-leakage capability. Through the integration of the diaphragm 4 and the diaphragm pressure plate assembly, the risk of loose connection is reduced and the leakage point is reduced.

[0018] Example 2 Based on Example 1, such as Figure 1 and Figure 2As shown, the water safety pressure relief valve of this utility model also includes a handle 14 and a pin 15. The handle 14 is installed at the top of the valve stem 8, and the pin 15 passes through the handle 14 and the valve stem 8. like Figure 4 As shown, it also includes a groove 16, which is located at the top of the adjusting screw 7; like Figure 2 As shown, it also includes a second sealing ring 17, which is disposed between the valve body 1 and the pressure relief port 2; like Figure 1 As shown, it also includes bolts 18, and the valve cover 3 is mounted on the top of the valve body 1 by bolts 18; In this embodiment, by adjusting the screw 7 to limit the top of the spring 9, the bottom of the spring 9 is elastically pressed downward against the second pressing member 11, thereby causing the second pressing member 11 to elastically press downward against the diaphragm 4 through the first pressing member 10, so that the diaphragm 4 seals the top opening of the pressure relief port 2. When the pressure in the water system pushes the diaphragm 4 to elastically deform upward, the diaphragm 4 compresses the spring 9 through the first pressing member 10 and the second pressing member 11. When the pressure is restored, the spring 9 pushes the diaphragm 4 to elastically deform downward and reset. By rotating the adjusting screw 7 and moving it downward, the adjusting screw 7 increases the compression of the spring 9, the preload of the spring 9 increases, and the pressure relief setting value increases. Conversely, the pressure relief setting value decreases, improving the convenience of manual and precise pressure control. The spring 9 and the valve body 1 are coaxially arranged to ensure that the pressure transmission is not offset and improve the pressure relief response speed. The operator can operate by grasping the handle 14 to rotate the valve stem 8, which improves the convenience of adjusting the preload of the spring 9.

[0019] In operation, the water safety pressure relief valve of this utility model connects the inlet of the valve body 1 to the water system. In the initial state, the diaphragm pressure plate provides downward elastic pressure to the diaphragm 4, causing the diaphragm 4 to seal the top of the pressure relief port 2. When the water pressure in the water system exceeds the set value, the water pressure acts on the bottom of the diaphragm 4 and pushes the diaphragm 4 to deform upward elastically. At this time, the bottom of the diaphragm 4 and the top of the pressure relief port 2 open, thereby allowing water in the water system to be discharged outward through the pressure relief port 2 to relieve pressure. When the water pressure drops below the set value, the diaphragm pressure plate assembly pushes the diaphragm 4 to deform downward and reset, closing the pressure relief port 2 and stopping the pressure relief.

[0020] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A water safety pressure relief valve, comprising a valve body (1) and a pressure relief port (2), wherein the pressure relief port (2) is connected to the bottom of the valve body (1), and a water inlet is provided on the side of the valve body (1); characterized in that, It also includes a diaphragm pressure plate assembly, a valve cover (3), a diaphragm (4) and a first sealing ring (5). The valve cover (3) is installed on the top of the valve body (1), the diaphragm (4) is installed between the valve body (1) and the valve cover (3), the first sealing ring (5) is installed in the sealing groove inside the valve body (1), and the first sealing ring (5) cooperates with the sealing lip of the diaphragm (4). The valve cover (3) is provided with a diaphragm pressure plate assembly, which is used to elastically press the diaphragm (4).

2. The water safety pressure relief valve as described in claim 1, characterized in that, It also includes a top cover (6), an adjusting screw (7), a valve stem (8) and a spring (9). The top cover (6) is installed on the top opening of the valve cover (3), the adjusting screw (7) is screwed into the inside of the valve cover (3), the upper part of the valve stem (8) is installed on the adjusting screw (7), and the spring (9) is fitted on the outside of the valve stem (8). The diaphragm plate assembly includes a first pressing member (10), a second pressing member (11), a protrusion (12), and a notch (13). The bottom end of the valve stem (8) is inserted into the second pressing member (11), and the second pressing member (11) is embedded in the first pressing member (10). The bottom end of the first pressing member (10) contacts the top end of the diaphragm (4). The protrusion (12) is located at the top end of the diaphragm (4), and the notch (13) is located in the middle of the first pressing member (10). The first pressing member (10) is mounted on the protrusion (12) through the notch (13).

3. The water safety pressure relief valve as described in claim 2, characterized in that, It also includes a handle (14) and a pin (15), with the handle (14) mounted on the top of the valve stem (8) and the pin (15) passing through the handle (14) and the valve stem (8).

4. The water safety pressure relief valve as described in claim 2, characterized in that, It also includes a groove (16), which is located on the top of the adjusting screw (7).

5. The water safety pressure relief valve as described in claim 1, characterized in that, It also includes a second sealing ring (17), which is disposed between the valve body (1) and the pressure relief port (2).

6. The water safety pressure relief valve as described in claim 1, characterized in that, It also includes bolts (18), and the valve cover (3) is mounted on the top of the valve body (1) by bolts (18).

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