Diaphragm type pressure release valve

Abstract

The utility model discloses a diaphragm type pressure release valve which comprises a valve body, a valve cover arranged on the valve body and a pressure release valve element arranged on the valve cover in a sliding mode. A pressure relief cavity is formed between the valve body and the valve cover, a water inlet pipe and a water outlet pipe which are communicated with the pressure relief cavity are formed on the valve body, a diaphragm piece is arranged on the valve cover, the valve body at least comprises a pressure relief state and a normal pressure state, and when the valve body is in the normal pressure state, the diaphragm piece is supported at the bottom of a pressure relief valve element so that the pressure relief valve element can seal the water inlet pipe. When the valve body is in a pressure relief state, the diaphragm piece deforms towards the valve cover and is far away from the pressure relief valve element, so that the pressure relief valve element slides downwards and is communicated with the water inlet pipe and the water outlet pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure relief valves, in particular to a diaphragm type pressure relief valve. Background Art

[0002] The primary function of a pressure relief valve is to protect equipment and pipelines. When pressure within a piece of equipment or pipeline exceeds a set pressure, the valve automatically opens to release the excess pressure, thereby preventing damage to the equipment or pipeline caused by overpressure. Specifically, the valve regulates system pressure to ensure that the medium pressure remains within a safe range, thus preventing accidents caused by excessive pressure.

[0003] A diaphragm pressure relief valve is a valve that opens and closes through the deformation of a flexible diaphragm. Existing pneumatic diaphragm valves typically require springs, pull rods, and other components to reset the diaphragm. This complex auxiliary mechanism results in a complex structure, high cost, and a high failure rate. Utility Model Content

[0004] In order to solve the technical problems existing in the background technology, the utility model proposes a diaphragm type pressure relief valve.

[0005] The technical solutions adopted by the present invention to solve the technical problems are as follows:

[0006] A diaphragm type pressure relief valve comprises a valve body, a valve cover arranged on the valve body, and a pressure relief valve core slidably arranged on the valve cover;

[0007] A pressure relief chamber is formed between the valve body and the valve cover, and a water inlet pipe and a water outlet pipe connected to the pressure relief chamber are formed on the valve body. A diaphragm is provided on the valve cover, and the valve body includes at least a pressure relief state and a normal pressure state. When the valve body is in the normal pressure state, the diaphragm is supported on the bottom of the pressure relief valve core so that the pressure relief valve core seals the water inlet pipe. When the valve body is in the pressure relief state, the diaphragm is deformed toward the valve cover and away from the pressure relief valve core, so that the pressure relief valve core slides down and connects the water inlet pipe and the water outlet pipe.

[0008] Preferably, the pressure relief valve core is provided with a sealing ring having an elastic sealing protrusion formed thereon. When the valve body is under normal pressure, the elastic sealing protrusion abuts the water inlet pipe to isolate the water inlet pipe from the pressure relief chamber. Through the above improvement, the elastic sealing protrusion on the sealing ring abuts the water inlet pipe, thereby enhancing the sealing performance of the pressure relief valve core in blocking the water inlet pipe under normal pressure.

[0009] Preferably, a sliding protrusion extends from the bottom of the pressure relief valve core, and a sliding groove is formed on the valve cover for the sliding protrusion to be placed in. Through the above improvement, when the pressure on the pressure relief valve core reaches a certain level, the diaphragm cannot support the pressure relief valve core and it will jump downward. Without the support of the diaphragm, the pressure relief valve core will move downward, thereby connecting the water inlet pipe and the water outlet pipe to relieve pressure.

[0010] Preferably, a sealing groove is formed on the outer periphery of the valve cover, and a first sealing ring is arranged in the sealing groove, and the first sealing ring abuts against the valve body. Through the above improvement, the first sealing ring is arranged in the sealing groove, and the first sealing ring abuts against the valve body, thereby ensuring the sealing performance of the valve cover and the valve body.

[0011] Preferably, ratchets are arranged at intervals on the outer periphery of the valve cover. Through the above improvements, the ratchets will form barbs after being pressed in, thereby preventing the valve cover from retreating and ensuring the reliability of the connection between the valve cover and the valve body.

[0012] Preferably, the bottom of the pressure relief valve core is formed with an annular extrusion convex portion. Through the above improvement, the annular extrusion convex portion is used to squeeze the diaphragm, thereby ensuring the uniformity of the pressure on the diaphragm and improving the accuracy of pressure control.

[0013] Preferably, the diaphragm is sleeved on the sliding protrusion, and the valve cover is formed with an arcuate fitting surface. When the valve body is in the pressure relief state, the diaphragm fits the arcuate fitting surface. Through the above improvement, the arcuate fitting surface limits the position of the diaphragm, ensuring the up and down movement of the pressure relief valve core.

[0014] Preferably, an adjusting rod is inserted into the sliding groove, a pressure adjusting spring is provided on the adjusting rod, and the adjusting rod is threadedly connected to the valve cover. With the above improvement, the adjusting rod can be rotated to control the adjusting rod to slide up and down in the sliding groove, and the pressure required to lower the pressure relief valve core can be controlled by adjusting the contact force between the pressure adjusting spring and the adjusting rod.

[0015] Preferably, a second sealing ring is sleeved on the regulating rod, one end of the sealing ring abuts against the bottom of the sliding groove, and the other end abuts against the regulating rod. Through the above improvements, the sealing performance of the regulating rod and the valve cover is greatly improved.

[0016] Preferably, a damping ring is disposed within the sliding groove, and an adjustment ring is pivotally mounted on the bottom of the valve cover, engaging with the valve cover thread. Rotation of the adjustment ring compresses or expands the diameter of the sliding groove, forcing the damping ring to squeeze or release the sliding protrusion. With the above improvements, the adjustment ring engages with the valve cover thread. As the adjustment ring rotates, it continuously squeezes the sliding groove, causing the diameter of the sliding groove to continuously decrease. This increases the friction force exerted by the damping ring against the sliding protrusion, thereby controlling the pressure required to lower the pressure relief valve core.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0018] By arranging a pressure relief chamber between the valve body and the valve cover, the pressure relief valve core is automatically arranged in the pressure relief chamber, and an inlet pipe and an outlet pipe connected to the pressure relief chamber are arranged on the valve body, and a diaphragm is arranged on the valve cover, so that the valve body has a pressure relief state and a normal pressure state. When the valve body is in the normal pressure state, the diaphragm is supported on the bottom of the pressure relief valve core to make the pressure relief valve core seal the water inlet pipe. When the valve body is in the pressure relief state, the diaphragm is deformed toward the valve cover and away from the pressure relief valve core to make the pressure relief valve core slide down and connect the water inlet pipe and the outlet pipe. The diaphragm is used to control the bearing capacity of the pressure relief valve core, and after the pressure drops to a certain value, the diaphragm will automatically reset. Compared with the prior art in which a spring, a pull rod, etc. are set to achieve the resetting of the diaphragm valve, the internal structure is simpler and the failure rate is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the present utility model;

[0020] Figure 2 This is a schematic structural diagram of another angle of the first embodiment of the present invention;

[0021] Figure 3 This is an exploded view of the overall structure of Example 1 of the present utility model;

[0022] Figure 4 This is a cross-sectional view of the overall structure of Example 1 of the present utility model;

[0023] Figure 5 This is a schematic structural diagram of the cooperation between the pressure relief valve core and the diaphragm in Example 1 of the present utility model;

[0024] Figure 6 This is a cross-sectional view of the second embodiment of the present utility model;

[0025] Figure 7 This is a cross-sectional view of the third embodiment of the present invention;

[0026] Figure: 1. Valve body; 2. Valve cover; 3. Pressure relief valve core; 4. Pressure relief chamber; 5. Water inlet pipe; 6. Water outlet pipe; 7. Diaphragm; 1.1. Sealing ring; 1.2. Elastic sealing protrusion; 1.3. Sliding protrusion; 1.4. Sliding groove; 1.5. Sealing groove; 1.6. First sealing ring; 1.7. Ratchet; 1.8. Annular extrusion protrusion; 1.9. Arc-shaped fitting surface; 2.1. Adjusting rod; 2.2. Pressure adjusting spring; 2.3. Second sealing ring; 3.1. Damping ring; 3.2. Adjusting ring; 3.3. Connecting protrusion; DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] It should be understood that although terms such as upper, middle, lower, top, end, etc. appear in this document to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish elements from each other for ease of understanding, and are not used to define any direction or order limitation.

[0029] Example 1

[0030] like Figure 1-5 As shown, a diaphragm type pressure relief valve comprises a valve body 1, a valve cover 2 arranged on the valve body 1, and a pressure relief valve core 3 slidably arranged on the valve cover 2.

[0031] Specifically, a pressure relief chamber 4 is formed between the valve body 1 and the valve cover 2, and an inlet pipe 5 and an outlet pipe 6 connected to the pressure relief chamber 4 are formed on the valve body 1. A diaphragm 7 is provided on the valve cover 2, and the valve body 1 includes at least a pressure relief state and a normal pressure state. When the valve body 1 is in the normal pressure state, the diaphragm 7 is supported on the bottom of the pressure relief valve core 3 so that the pressure relief valve core 3 seals the water inlet pipe 5. When the valve body 1 is in the pressure relief state, the diaphragm 7 is deformed toward the valve cover 2 and away from the pressure relief valve core 3, so that the pressure relief valve core 3 slides down and connects the water inlet pipe 5 and the water outlet pipe 6.

[0032] By utilizing the diaphragm 7 to control the bearing strength of the pressure relief valve core 3, when the pressure reaches the starting value of the diaphragm 7, the diaphragm 7 will move away from the pressure relief valve core 3, causing the pressure relief valve core 3 to slide downward to relieve pressure, and after the pressure drops to the reset value of the diaphragm 7, the diaphragm 7 will automatically reset, lifting the pressure relief valve core 3 upward to close the water inlet channel. Compared with the prior art in which a spring, a pull rod, etc. are provided to achieve the reset of the diaphragm valve, the internal structure is simpler and the failure rate is greatly reduced.

[0033] like Figure 1-5 As shown, as a further explanation of the pressure relief valve core 3, a sealing ring 1.1 is provided on the pressure relief valve core 3, and an elastic sealing protrusion 1.2 is formed on the sealing ring 1.1. When the valve body 1 is in a normal pressure state, the elastic sealing protrusion 1.2 abuts against the water inlet pipe 5 to separate the water inlet pipe 5 and the pressure relief chamber 4.

[0034] Among them, the sealing ring 1.1 is made of elastic material, and the elastic sealing protrusion 1.2 on the sealing ring 1.1 is used to abut against the water inlet pipe 5, thereby increasing the sealing performance of the pressure relief valve core 3 to block the water inlet pipe 5 under normal pressure, and preventing water from being discharged through the gap between the pressure relief valve core 3 and the water inlet pipe 5.

[0035] Specifically, a sliding protrusion 1.3 extends from the bottom of the pressure relief valve core 3, and a sliding groove 1.4 is formed on the valve cover 2 for the sliding protrusion 1.3 to be placed. When the pressure on the pressure relief valve core 3 reaches a certain level, the diaphragm 7 cannot support the pressure relief valve core 3 and will jump downward. The pressure relief valve core 3 will move downward without the support of the diaphragm 7, thereby connecting the water inlet pipe 5 and the water outlet pipe 6 to relieve pressure.

[0036] Furthermore, the diaphragm 7 is sleeved on the sliding protrusion 1.3, and an arc-shaped fitting surface 1.9 is formed on the cover. The sliding protrusion 1.3 can limit the diaphragm 7 to prevent it from deflecting during the deformation process. In addition, when the valve body 1 is in the pressure relief state, the diaphragm 7 fits with the arc-shaped fitting surface 1.9, and the arc-shaped fitting surface 1.9 limits the position of the diaphragm 7, ensuring the up and down movement of the pressure relief valve core 3.

[0037] Preferably, an annular extrusion convex portion 1.8 is formed at the bottom of the pressure relief valve core 3, and the annular extrusion convex portion 1.8 is used to squeeze the diaphragm 7, thereby ensuring the uniformity of the pressure on the diaphragm 7 and improving the accuracy of pressure control.

[0038] like Figure 1-5 As shown, as a further explanation of the valve cover 2, a sealing groove 1.5 is formed on the outer periphery of the valve cover 2, and a first sealing ring 1.6 is arranged in the sealing groove 1.5. The first sealing ring 1.6 abuts against the valve body 1. The first sealing ring 1.6 is arranged in the sealing groove 1.5, and the first sealing ring 1.6 is used to fit the valve body 1 to ensure the sealing of the valve cover 2 and the valve body 1.

[0039] Preferably, ratchets 1.7 are arranged at intervals on the outer periphery of the valve cover 2. The ratchets 1.7 will form barbs after being pressed in, thereby preventing the valve cover 2 from moving back and ensuring the reliability of the connection between the valve cover 2 and the valve body 1.

[0040] Example 2

[0041] like Figure 6 As shown, the difference between this embodiment and the first embodiment is that an adjusting rod 2.1 is inserted into the sliding groove 1.4, a pressure adjusting spring 2.2 is provided on the adjusting rod 2.1, and the adjusting rod 2.1 is threadedly connected to the valve cover 2.

[0042] During use, the regulating rod 2.1 can be rotated to control the regulating rod 2.1 to slide up and down in the sliding groove 1.4, and the pressure required for the pressure relief valve core 3 to descend can be controlled by adjusting the contact force between the pressure regulating spring 2.2 and the regulating rod 2.1.

[0043] Preferably, a second sealing ring 2.3 is sleeved on the regulating rod 2.1, one end of the sealing ring abuts the bottom of the sliding groove 1.4, and the other end abuts the regulating rod 2.1, which greatly improves the sealing performance of the regulating rod 2.1 and the valve cover 2.

[0044] Example 3

[0045] like Figure 7 As shown, the difference between this embodiment and the first embodiment is that a damping ring 3.1 is provided in the sliding groove 1.4, and an adjusting ring 3.2 threadedly engaged with the valve cover 2 is rotated at the bottom of the valve cover 2. The adjusting ring 3.2 rotates to compress or expand the diameter of the sliding groove 1.4 and force the damping ring 3.1 to squeeze or release the sliding protrusion 1.3.

[0046] Specifically, a connecting protrusion 3.3 is formed at the bottom of the valve cover 2, and the sliding groove 1.4 is formed in the connecting protrusion 3.3, and the connecting protrusion 3.3 tends to expand along the extension direction of the sliding groove 1.4. The adjusting ring 3.2 is threadedly engaged with the valve cover 2. As the adjusting ring 3.2 rotates, it will continuously squeeze the sliding groove 1.4, causing the diameter of the sliding groove 1.4 to continuously shrink, thereby increasing the friction force of the damping ring 3.1 squeezing the sliding protrusion 1.3 to control the pressure required for the pressure relief valve core 3 to descend.

[0047] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A diaphragm pressure relief valve, characterized in that: It comprises a valve body (1), a valve cover (2) arranged on the valve body (1), and a pressure relief valve core (3) slidably arranged on the valve cover (2); A pressure relief chamber (4) is formed between the valve body (1) and the valve cover (2); a water inlet pipe (5) and a water outlet pipe (6) connected to the pressure relief chamber (4) are formed on the valve body (1); a diaphragm (7) is provided on the valve cover (2); and the valve body (1) includes at least a pressure relief state and a normal pressure state. When the valve body (1) is in the normal pressure state, the diaphragm (7) is supported on the bottom of the pressure relief valve core (3) so that the pressure relief valve core (3) seals the water inlet pipe (5); when the valve body (1) is in the pressure relief state, the diaphragm (7) is deformed toward the valve cover (2) and away from the pressure relief valve core (3) so that the pressure relief valve core (3) slides down and connects the water inlet pipe (5) and the water outlet pipe (6).

2. A diaphragm pressure relief valve according to claim 1, characterized in that: A sealing ring (1.1) is provided on the pressure relief valve core (3), and an elastic sealing convex portion (1.2) is formed on the sealing ring (1.1); when the valve body (1) is in a normal pressure state, the elastic sealing convex portion (1.2) abuts against the water inlet pipe (5) to isolate the water inlet pipe (5) and the pressure relief chamber (4).

3. A diaphragm pressure relief valve according to claim 1, characterized in that: A sliding convex portion (1.3) extends from the bottom of the pressure relief valve core (3), and a sliding groove (1.4) for the sliding convex portion (1.3) to be placed is formed on the valve cover (2).

4. The diaphragm pressure relief valve according to claim 1, characterized in that: A sealing groove (1.5) is formed on the outer periphery of the valve cover (2), a first sealing ring (1.6) is provided in the sealing groove (1.5), and the first sealing ring (1.6) abuts against the valve body (1).

5. The diaphragm pressure relief valve according to claim 1, characterized in that: Ratchet teeth (1.7) are arranged at intervals on the outer periphery of the valve cover (2).

6. The diaphragm pressure relief valve according to claim 1, characterized in that: The bottom of the pressure relief valve core (3) is formed with an annular extrusion convex portion (1.8).

7. The diaphragm pressure relief valve according to claim 3, characterized in that: The diaphragm (7) is sleeved on the sliding protrusion (1.3), and an arc-shaped fitting surface (1.9) is formed on the valve cover (2). When the valve body (1) is in a pressure relief state, the diaphragm (7) fits the arc-shaped fitting surface (1.9).

8. The diaphragm pressure relief valve according to claim 3, characterized in that: An adjusting rod (2.1) is inserted into the sliding groove (1.4), a pressure adjusting spring (2.2) is provided on the adjusting rod (2.1), and the adjusting rod (2.1) is threadedly connected to the valve cover (2).

9. The diaphragm pressure relief valve according to claim 8, characterized in that: A second sealing ring (2.3) is sleeved on the regulating rod (2.1), one end of the sealing ring abuts against the bottom of the sliding groove (1.4), and the other end abuts against the regulating rod (2.1).

10. The diaphragm pressure relief valve according to claim 3, characterized in that: A damping ring (3.1) is provided in the sliding groove (1.4), and an adjusting ring (3.2) threadedly engaged with the valve cover (2) is provided at the bottom of the valve cover (2). The adjusting ring (3.2) rotates to compress or expand the diameter of the sliding groove (1.4) and force the damping ring (3.1) to squeeze or release the sliding protrusion (1.3).

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