Piston type pressure maintaining and releasing valve

Abstract

The utility model discloses a piston type pressure holding and releasing valve which comprises a pressure releasing valve body, a liquid inlet pipe and a flange plate, the liquid inlet pipe is fixed on one side of a valve body of the pressure releasing valve body, the flange plate is fixed on an outer pipe opening of the liquid inlet pipe, and the piston type pressure holding and releasing valve further comprises a buffering mechanism. The buffer mechanism comprises a lapping ring, an inner buffer pipe, a connecting claw, a supporting head, a T-shaped guide frame, a metal supporting disc, a guide rod, a spring and a rubber disc, the lapping ring is clamped in a disc groove of the flange disc, the buffer mechanism is arranged at the position of a pressure release valve body of the piston type pressure maintaining and releasing valve, the rubber disc of the buffer mechanism is matched with the metal supporting disc, and the elastic effect of the spring is achieved. According to the piston type pressure holding and releasing valve, the impact pressure of liquid at the pressure releasing valve body can be effectively absorbed and dispersed for pressure holding, so that the piston type pressure holding and releasing valve can better adapt to changes of liquid pressure, frequent actions of the valve body are reduced, the stability of the piston type pressure holding and releasing valve is improved, and the service life of the piston type pressure holding and releasing valve is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure relief valve technical field, especially a piston type pressure holding pressure relief valve. BACKGROUND

[0002] The piston type pressure holding pressure relief valve is an important pipeline device, and is mainly installed on the pipeline of high-rise buildings, fire water supply systems and other water supply systems. When the pressure in the water supply pipeline exceeds the set value, it can automatically open to quickly release pressure, thereby protecting the safety of the pipeline, and it can also be used as a pressure holding valve to guarantee the water supply pressure upstream of the main valve.

[0003] The piston type pressure holding pressure relief valve of the prior art is sensitive to the change of system pressure when used in the pipeline, because a high-sensitivity sensor and an actuator are arranged in the valve. In some cases where the pressure changes frequently, this may cause the valve to open and close too frequently, thereby affecting the stability and service life of the piston type pressure holding pressure relief valve. Therefore, the piston type pressure holding pressure relief valve is provided. SUMMARY

[0004] The main purpose of the utility model is to provide a piston type pressure holding pressure relief valve, which is configured with a buffer mechanism at the pressure relief valve body of the piston type pressure holding pressure relief valve. The cooperation of the rubber disc and the metal supporting disc of the buffer mechanism, as well as the elastic effect of the spring, can effectively absorb and disperse the impact pressure of the liquid at the pressure relief valve body to hold pressure. This makes the piston type pressure holding pressure relief valve better adapt to the change of liquid pressure, reduces the frequent operation of the valve body, improves the stability and service life of the piston type pressure holding pressure relief valve, and effectively solves the problems in the background art.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows:

[0006] A piston type pressure holding pressure relief valve, comprising a pressure relief valve body, a liquid inlet pipe and a flange disc, the valve body of the pressure relief valve body is fixed with the liquid inlet pipe on one side, and the outer pipe opening of the liquid inlet pipe is fixed with the flange disc, further comprising a buffer mechanism, the buffer mechanism comprises a lap ring, an inner buffer pipe, a connecting claw, a supporting head, a T-shaped bracket, a metal supporting disc, a guide rod, a spring and a rubber disc, the lap ring is clamped in the disc groove of the flange disc, and the inner buffer pipe inserted into the liquid inlet pipe is fixed in the ring opening of the lap ring, the supporting head is welded to the inner pipe wall of the lap ring through the connecting claw, and the guide rod of the T-shaped bracket is screwed to the rear end surface of the supporting head, the metal supporting disc is movably sleeved with the guide rod outside the guide rod of the T-shaped bracket, and the guide hole for inserting the guide rod is formed in the surface of the metal supporting disc, the guide rod is fixed on the surface of the bracket disc of the T-shaped bracket, the spring is sleeved outside the guide rod on one side of the metal supporting disc, the rubber disc is arranged outside the disc body of the metal supporting disc to form a buffer cavity by abutting against the inner wall of the inner buffer pipe, and the plug ring is integrally formed at the rear disc surface of the rubber disc.

[0007] Further, the metal supporting disc is provided with a rib plate protruding from the outer disc edge, and the rib plate is fixed in the disc body of the rubber disc.

[0008] By using the above technical scheme, the rib plate of the metal supporting disc can be fixed in the rubber disc to provide support, so that the impact resistance of the rubber disc to liquid is improved and the rubber disc is more durable, and meanwhile, the rib plate fixed in the rubber disc also improves the connection stability between the rubber disc and the metal supporting disc, thereby ensuring the reliability and durability of the buffering mechanism.

[0009] Further, the metal supporting disc is provided with a rib plate protruding from the outer disc edge, and the rib plate is fixed in the disc body of the rubber disc.

[0010] By using the above technical scheme, the metal supporting disc is provided with a rib plate protruding from the outer disc edge, and the rib plate is fixed in the disc body of the rubber disc.

[0011] Further, the metal supporting disc is provided with a rib plate protruding from the outer disc edge, and the rib plate is fixed in the disc body of the rubber disc.

[0012] By using the above technical scheme, the metal supporting disc is provided with a rib plate protruding from the outer disc edge, and the rib plate is fixed in the disc body of the rubber disc.

[0013] Further, the metal supporting disc is provided with a rib plate protruding from the outer disc edge, and the rib plate is fixed in the disc body of the rubber disc.

[0014] By using the above technical scheme, the metal supporting disc is provided with a rib plate protruding from the outer disc edge, and the rib plate is fixed in the disc body of the rubber disc.

[0015] Further, the metal supporting disc is provided with a rib plate protruding from the outer disc edge, and the rib plate is fixed in the disc body of the rubber disc.

[0016] By using the above technical scheme, the metal supporting disc is provided with a rib plate protruding from the outer disc edge, and the rib plate is fixed in the disc body of the rubber disc.

[0017] Compared with the prior art, the utility model has the advantages of:

[0018] The utility model discloses a buffering mechanism is arranged at the pressure relief valve body of piston type pressure maintaining pressure relief valve, and the cooperation of rubber disc and metal support tray of buffering mechanism and the elastic action of spring can effectively absorb and disperse the impact pressure of liquid at pressure relief valve body and maintain pressure, so that the piston type pressure maintaining pressure relief valve can better adapt to the change of liquid pressure, reduce the frequent action of valve body, improve the stability and service life of piston type pressure maintaining pressure relief valve.

[0019] And the rib plate on the metal support tray not only enhances the structural strength of the metal support tray, but also improves the connection stability between the rubber disc and the metal support tray, so that the whole buffering mechanism is more durable, and at the same time, the ball head arranged at the other end of the support head away from the rotary hole can also reduce the impact damage when the support head contacts with liquid, further improving the durability. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 It is the whole structure schematic diagram of piston type pressure maintaining pressure relief valve of the utility model.

[0021] Fig. 2 It is buffering mechanism and liquid inlet pipe split schematic diagram of piston type pressure maintaining pressure relief valve of the utility model.

[0022] Fig. 3 It is buffering mechanism explosion view of piston type pressure maintaining pressure relief valve of the utility model.

[0023] In the drawing: 1, pressure relief valve body, 2, liquid inlet pipe, 3, flange plate, 4, buffering mechanism, 5, lap ring, 6, inner buffering pipe, 7, connecting claw, 8, support head, 9, rotary hole, 10, T-shaped bracket, 11, metal support tray, 12, lead hole, 13, guide hole, 14, guide rod, 15, spring, 16, rib plate, 17, rubber disc, 18, plug ring. DETAILED DESCRIPTION

[0024] In order to make the technical means, creation features, purposes and effects realized by the utility model easy to understand, the utility model is further described in combination with specific implementation manners.

[0025] For example, Figs. 1-3As shown, a piston type pressure holding and pressure relief valve comprises a pressure relief valve body 1, a liquid inlet pipe 2 and a flange plate 3, the valve body side of the pressure relief valve body 1 is fixed with the liquid inlet pipe 2, and the outer pipe opening of the liquid inlet pipe 2 is fixed with the flange plate 3, further comprising a buffer mechanism 4, the buffer mechanism 4 comprises a lap ring 5, an inner buffer pipe 6, a connecting claw 7, a support head 8, a T-shaped guide frame 10, a metal support plate 11, a guide rod 14, a spring 15 and a rubber plate 17, the lap ring 5 is clamped in the disc groove of the flange plate 3, and the inner buffer pipe 6 inserted into the liquid inlet pipe 2 is fixed in the ring opening of the lap ring 5, the support head 8 is welded to the inner pipe wall of the lap ring 5 through the connecting claw 7, and the guide rod of the T-shaped guide frame 10 is screwed to the rear end surface of the support head 8, the metal support plate 11 is movably sleeved on the guide rod of the T-shaped guide frame 10, and the guide hole 13 for inserting the guide rod 14 is formed on the surface of the metal support plate 11, the guide rod 14 is fixed on the surface of the frame disc of the T-shaped guide frame 10, and the spring 15 is sleeved on the guide rod 14 on one side of the metal support plate 11, the rubber plate 17 for buffering the inner wall of the inner buffer pipe 6 is arranged outside the disc body of the metal support plate 11, and the plug ring 18 is integrally formed on the rear disc surface of the rubber plate 17.

[0026] Wherein, the outer disc edge of the metal support plate 11 is provided with a rib plate 16, and the rib plate 16 is fixed in the disc body of the rubber plate 17;

[0027] By adopting the above technical scheme, the rib plate 16 of the metal support plate 11 can be fixed in the rubber plate 17 to provide support, so that the impact resistance of the rubber plate 17 to liquid is improved and the durability is improved, and at the same time, the rib plate fixed in the rubber plate also improves the connection stability between the rubber plate 17 and the metal support plate 11, thereby ensuring the reliability and durability of the buffer mechanism 4.

[0028] Wherein, the disc body of the metal support plate 11 is provided with a guide hole 12 in the middle, and the guide rod of the T-shaped guide frame 10 passes through the guide hole 12;

[0029] By adopting the above technical scheme, the metal support plate 11 can be movably connected with the guide rod of the T-shaped guide frame 10 through the guide hole 12, so that the metal support plate 11 can slide out of the inner buffer pipe 6 at the guide rod.

[0030] Wherein, the rear end surface of the support head 8 is provided with a threaded hole 9 for screwing the guide rod of the T-shaped guide frame 10, and the other end away from the threaded hole 9 is provided with a ball head;

[0031] By adopting the above technical scheme, the support head 8 can be connected with the guide rod of the T-shaped guide frame 10 through the threaded hole 9, and the ball head provided at the other end away from the threaded hole 9 of the support head 8 can reduce the impact damage when the support head contacts with liquid, thereby improving the durability of the support head 8.

[0032] The connecting claws 7 between the branch head 8 and the inner buffer pipe 6 are welded with four groups, and the connecting claws 7 are welded at the branch head 8 and the inner buffer pipe 6 with vertical claw plates.

[0033] By adopting the above technical scheme, the branch head 8 and the inner buffer pipe 6 are connected by welding four groups of connecting claws 7, the stability of the connection between the branch head 8 and the inner buffer pipe 6 is improved, and the reliability of the buffer mechanism in a high-pressure environment is ensured.

[0034] The guide rod of the T-shaped guide frame 10 extends out of the rear pipe opening of the inner buffer pipe 6 after being screwed with the branch head 8, and the guide rod tail end of the T-shaped guide frame 10 is centrally welded with the circular disc body of the frame disc.

[0035] By adopting the above technical scheme, when the metal supporting disc 11 and the rubber disc 17 are subjected to a relatively large liquid impact pressure, the metal supporting disc 11 can take the rubber disc 17 along the inner buffer pipe 6 into the liquid inlet pipe 2, so that the liquid can normally pass through the pressure relief valve body 1.

[0036] It should be noted that the utility model is a piston type pressure maintaining pressure relief valve, the buffer mechanism 4 is arranged at the pressure relief valve body 1 of the piston type pressure maintaining pressure relief valve, the lap joint 5 of the buffer mechanism 4 can be clamped in the surface groove of the flange disc 3 of the pressure relief valve body 1, then the inner buffer pipe 6 behind the lap joint 5 can be clamped into the liquid inlet pipe 2, then the flange disc 3 can be connected with the disc body flange of the liquid supply pipeline, so that the lap joint 5 is locked and pressed between the flange discs 3, when the liquid in the liquid supply pipeline enters the pressure relief valve body 1 from the inner buffer pipe 6, the liquid with pressure can rush to the metal supporting disc 11 after the branch head 8, the metal supporting disc 11 rubs with the rubber disc 17 in the inner buffer pipe 6 to form a buffer structure, under the action of continuous liquid pressure, the metal supporting disc 11 moves at the guide rod of the T-shaped guide frame 10 to compress the spring 15 to buffer, so that the impact pressure of the liquid can be effectively absorbed and dispersed, the direct impact on the pressure relief valve body 1 is reduced, by arranging the buffer mechanism 4, the piston type pressure maintaining pressure relief valve can better adapt to the change of system pressure, frequent action is reduced, and the stability and service life of the piston type pressure maintaining pressure relief valve are improved.

[0037] It should be noted that the utility model is a piston type pressure maintaining pressure relief valve, the components in the utility model are components known by those skilled in the art, and the structure and principle thereof can be known by those skilled in the art through a technical manual or through a conventional experimental method.

[0038] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A piston type pressure maintaining and pressure releasing valve, comprising a pressure releasing valve body (1), a liquid inlet pipe (2) and a flange plate (3), the valve body (1) is fixed with the liquid inlet pipe (2) on one side of the valve body (1), and the outer pipe opening of the liquid inlet pipe (2) is fixed with the flange plate (3), characterized in that: It also includes a buffering mechanism (4) comprising a loop (5), an inner buffering tube (6), a connecting claw (7), a supporting head (8), a T-shaped guide frame (10), a metal supporting disc (11), a guide rod (14), a spring (15) and a rubber disc (17), the flange disc (3) is clamped with the loop (5) in the disc groove, and the loop (5) is fixed with the inner buffering tube (6) inserted into the liquid pipe (2) in the ring opening, the inner buffering tube (6) is welded with the supporting head (8) near the inner tube wall of the loop (5) through the connecting claw (7), and the rear end surface of the supporting head (8) is screwed with the guide rod of the T-shaped guide frame (10), the guide rod of the T-shaped guide frame (10) is movably sleeved with the metal supporting disc (11) outside, and the metal supporting disc (11) is provided with a guide hole (13) for inserting the guide rod (14) on the surface, the guide rod (14) is fixed on the surface of the frame disc of the T-shaped guide frame (10), and the guide rod (14) outside the metal supporting disc (11) is sleeved with the spring (15) on one side, the disc body of the metal supporting disc (11) is provided with the rubber disc (17) for buffering the inner wall of the inner buffering tube (6) to form a buffering cavity, and the rear disc surface of the rubber disc (17) is integrally formed with a plug ring (18).

2. A poppet relief valve according to claim 1, wherein: The outer disc edge of the metal supporting disc (11) is protruded with a rib plate (16), and the rib plate (16) is fixed in the disc body of the rubber disc (17).

3. A poppet relief valve according to claim 1, wherein: The disc body of the metal supporting disc (11) is provided with a guide hole (12) in the middle, and the guide rod of the T-shaped guide frame (10) passes through the guide hole (12).

4. A poppet relief valve according to claim 1, wherein: The rear end surface of the supporting head (8) is provided with a threaded hole (9) for screwing the T-shaped guide frame (10), and the other end of the supporting head (8) away from the threaded hole (9) is provided with a ball head.

5. A poppet relief valve according to claim 1, wherein: The connecting claw (7) between the supporting head (8) and the inner buffering tube (6) is welded with four groups, and the connecting claw (7) is welded with a vertical claw plate at the supporting head (8) and the inner buffering tube (6).

6. A poppet relief valve according to claim 1, wherein: The guide rod of the T-shaped guide frame (10) after screwing the supporting head (8) protrudes from the rear tube opening of the inner buffering tube (6), and the guide rod of the T-shaped guide frame (10) is centrally welded with the circular disc body of the frame disc.

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