Slow-closing type three-way check valve with pressure relief function
By designing a three-way check valve with pressure relief and slow closing, and utilizing a damping hydraulic rod for buffer closing, a positioning ring, and a limit ring to ensure the valve core position, combined with a pressure relief valve and pressure relief pipe, the water hammer phenomenon and high pressure threat problems of traditional check valves are solved, achieving safe and stable fluid transportation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2026-03-20
AI Technical Summary
Traditional check valves may cause water hammer when the valve disc closes quickly, leading to damage to pipelines and equipment. Furthermore, they cannot release pressure in time under high pressure, threatening system safety.
The design incorporates a pressure relief and slow-closing three-way check valve, employing a damped hydraulic rod for buffered closure. A positioning ring and a limit ring ensure the valve core position, and the valve disc is tightly fitted with the sealing ring. It is equipped with a pressure relief valve and a pressure relief pipe to achieve slow-closing and pressure relief functions.
It effectively prevents water hammer, protects pipelines and equipment, ensures normal valve operation, prevents fluid backflow, and releases pressure in a timely manner under high pressure to ensure safe system operation.
Smart Images
Figure CN224017841U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to check valve technical field, concretely is with pressure relief slow -closing type three -way check valve. BACKGROUND
[0002] The function of this type of valve is to allow the medium to flow in one direction only and prevent it from flowing in the opposite direction. Usually, this valve works automatically, and under the action of fluid pressure flowing in one direction, the valve disc opens; when the fluid flows in the opposite direction, the valve disc acts on the valve seat under the combined action of fluid pressure and its own weight, thereby cutting off the flow.
[0003] In a fluid conveying system, check valve is a commonly used valve, which prevents fluid backflow and ensures normal operation of the system. When the traditional check valve is closed, the valve disc closes quickly due to the high pressure in the fluid pipe, which may cause water hammer phenomenon, causing damage to the pipe and equipment; at the same time, if the pressure in the pipe is too high, it will also pose a threat to the safety of the entire fluid conveying system.
[0004] When the traditional check valve is closed, the valve disc closes quickly, which may cause water hammer phenomenon, causing damage to the pipe and equipment; when the pressure in the pipe is too high, it will pose a threat to the safety of the entire pipe. Therefore, a check valve capable of effectively preventing water hammer phenomenon and having pressure relief function is needed. SUMMARY
[0005] In view of the deficiencies of the prior art, the utility model provides a pressure relief slow -closing type three -way check valve, which solves the problems of the traditional check valve, i.e. the valve disc closes quickly when the valve is closed, which may cause water hammer phenomenon, causing damage to the pipe and equipment; when the pressure in the pipe is too high, it will pose a threat to the safety of the entire pipe.
[0006] To achieve the above purpose, the utility model realizes the following technical scheme: a pressure relief slow -closing type three -way check valve, comprising a valve body and a valve core, the valve core is inserted into the inner side of the valve body, the valve body is provided with an input end flange, an output end flange and a pressure relief valve, the pressure relief valve is connected to the outer side of the output end flange, the valve core comprises:
[0007] Damping hydraulic rod;
[0008] Positioning ring, the positioning ring is located on the outer side of the damping hydraulic rod, the inner side of the positioning ring is connected with a connecting piece, and the connecting piece is connected to the outer side of the damping hydraulic rod;
[0009] Valve disc, the valve disc is sleeved on the damping hydraulic rod.
[0010] Preferably, the input end flange is arranged at the top of the valve body, and the output end flange is provided with two groups and is distributed on both sides of the input end flange.
[0011] Preferably, a limiting ring is arranged inside the output flange, and a valve seat is arranged inside the limiting ring, and a sealing ring is clamped on the valve seat.
[0012] Preferably, the pressure relief valve is connected with a pressure relief pipe, the other end of the pressure relief pipe is connected with the input flange, and the pressure relief valve and the pressure relief pipe are in communication with the input flange and the output flange.
[0013] Preferably, the damping hydraulic rod is provided with an output end.
[0014] Preferably, a sleeve hole is arranged on the valve disc, the sleeve hole is sleeved outside the output end, and the valve disc is tightly clamped with the valve seat and the sealing ring.
[0015] The utility model discloses a take pressure relief slow -closing type three -way check valve, and compared with the prior art, the utility model discloses beneficial effects are:
[0016] By setting up damping hydraulic rod, play the buffering effect in the valve closing process, slow down the closing speed, effectively prevent the generation of water hammer phenomenon, protect the pipeline and equipment from being damaged, the setting of the positioning ring and the limiting ring ensures the accurate position of the valve core in the valve body, guarantees the normal work of the valve, the valve disc is tightly clamped with the valve seat and the sealing ring, realizes good sealing effect, prevents fluid backflow, the setting of the pressure relief valve and the pressure relief pipe can relieve pressure in time when the system pressure is too high, guarantees the safe operation of the whole fluid conveying system. BRIEF DESCRIPTION OF DRAWINGS
[0017] Fig. 1 It is whole structure schematic view of the utility model;
[0018] Fig. 2 It is structure schematic view of the valve body of the utility model;
[0019] Fig. 3 It is structure schematic view of the valve core of the utility model.
[0020] In the drawing: 1, valve body;11, input flange;12, output flange;121, limiting ring;122, valve seat;123, sealing ring;13, pressure relief valve;131, pressure relief pipe;2, valve core;21, damping hydraulic rod;211, output end;22, positioning ring;221, connecting piece;23, valve disc;231, sleeve hole. DETAILED DESCRIPTION
[0021] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0022] The application provides a pressure relief and slow closing type three-way check valve, which solves the problem that the traditional check valve may cause water hammer phenomenon when the valve disc is closed at a high speed, and causes damage to the pipeline and equipment, and solves the problem that the safety of the entire pipeline is threatened when the pressure in the pipeline is too high, so that the occurrence of water hammer phenomenon is reduced, and the pressure in the conveying system is reasonably controlled.
[0023] The utility model disc embodiment provides a pressure relief and slow closing type three-way check valve.
[0024] Embodiment one
[0025] According to the drawings, Figs. 1-3 As shown, comprising valve body 1 and valve core 2, valve core 2 inserts in the inside of valve body 1, valve body 1 is provided with input end flange 11, output end flange 12 and pressure relief valve 13, pressure relief valve 13 is connected in the outside of output end flange 12, valve core 2 includes:
[0026] Damping hydraulic rod 21;
[0027] Positioning ring 22, positioning ring 22 is located in the outside of damping hydraulic rod 21, and the inside of positioning ring 22 is connected with connecting piece 221, and connecting piece 221 is connected in the outside of damping hydraulic rod 21;
[0028] Valve disc 23, valve disc 23 is sleeved on damping hydraulic rod 21.
[0029] By setting damping hydraulic rod 21, buffering effect is played in the process of closing the valve, the closing speed is slowed down, the generation of water hammer phenomenon is effectively prevented, and the pipeline and equipment are protected from being damaged;The setting of positioning ring 22 and limit ring 121 ensures the accurate position of valve core 2 in valve body 1, and ensures the normal work of the valve;Valve disc 23 is closely connected with valve seat 122 and sealing ring 123, good sealing effect is realized, and fluid backflow is prevented;The setting of pressure relief valve 13 and pressure relief pipe 131 can timely release pressure when the system pressure is too high, and ensures the safe operation of the entire fluid conveying system.
[0030] Further, the input end flange 11 is arranged at the top of the valve body 1, and the output end flange 12 is arranged in two groups and distributed on both sides of the input end flange 11.
[0031] Further, the output flange 12 is provided with a limiting ring 121 and a valve seat 122, the valve seat 122 is located inside the limiting ring 121, and a sealing ring 123 is clamped on the valve seat 122.
[0032] It is particularly disclosed that the pressure relief valve 13 is connected with a pressure relief pipe 131, the other end of the pressure relief pipe 131 is connected with the input flange 11, and the pressure relief valve 13 and the pressure relief pipe 131 communicate the input flange 11 and the output flange 12.
[0033] It is particularly disclosed that the damping hydraulic rod 21 is provided with an output end 211, and the damping hydraulic rod 21 can play a buffering role in the closing process of the valve, slow down the closing speed, and effectively prevent the generation of water hammer phenomenon.
[0034] Embodiment two
[0035] According to the drawings Figs. 1-3 It is shown that it comprises a valve body 1 and a valve core 2, the valve core 2 is inserted into the inside of the valve body 1, the valve body 1 is provided with an input flange 11, an output flange 12 and a pressure relief valve 13, the pressure relief valve 13 is connected to the outside of the output flange 12, and the valve core 2 comprises:
[0036] The damping hydraulic rod 21;
[0037] The positioning ring 22 is located outside the damping hydraulic rod 21, and the connecting piece 221 is connected to the inside of the positioning ring 22 and connected to the outside of the damping hydraulic rod 21;
[0038] The valve clack 23 is sleeved on the damping hydraulic rod 21.
[0039] It needs to be particularly emphasized that the valve clack 23 is provided with a sleeve hole 231, the sleeve hole 231 is sleeved on the outside of the output end 211, the valve clack 23 is tightly clamped with the valve seat 122 and the sealing ring 123, the valve clack 23 is opened when the fluid flows forward, and is closed when the fluid flows reversely, and plays a check valve role.
[0040] Working principle: when the fluid flows forward from the input flange 11 into the valve body 1, the pressure of the fluid pushes the valve clack 23 to open against the resistance of the damping hydraulic rod 21, and the fluid flows out through the output flange 12. At this time, the pressure relief valve 13 is in a closed state;
[0041] When the fluid appears a reverse flow trend, the valve clack 23 slowly closes under the buffering action of the damping hydraulic rod 21, preventing the generation of water hammer phenomenon. The valve clack 23 is tightly clamped with the valve seat 122 and the sealing ring 123, preventing the reverse flow of the fluid;
[0042] When the system pressure is too high, the pressure relief valve 13 is automatically opened, part of the fluid flows back from the output flange 12 to the input flange 11 through the pressure relief pipe 131, reducing the system pressure and ensuring the safe operation of the system.
[0043] 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 claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.
Claims
1. A three-way check valve with pressure relief and slow closing, comprising a valve body (1) and a valve core (2), wherein the valve core (2) is inserted into the inner side of the valve body (1), characterized in that, The valve body (1) is provided with an input flange (11), an output flange (12), and a pressure relief valve (13). The pressure relief valve (13) is connected to the outside of the output flange (12). The valve core (2) includes: Damping hydraulic rod (21); Positioning ring (22), the positioning ring (22) is located outside the damping hydraulic rod (21), and a connector (221) is connected to the inner side of the positioning ring (22), the connector (221) is connected to the outer side of the damping hydraulic rod (21); Valve disc (23), which is sleeved on damping hydraulic rod (21).
2. The three-way check valve with pressure relief and slow closing as described in claim 1, characterized in that, The input flange (11) is located on the top of the valve body (1), and there are two sets of output flanges (12) distributed on both sides of the input flange (11).
3. The three-way check valve with pressure relief and slow closing as described in claim 1, characterized in that, The output flange (12) is provided with a limit ring (121) and a valve seat (122) on the inner side. The valve seat (122) is located inside the limit ring (121), and a sealing ring (123) is snapped onto the valve seat (122).
4. The three-way check valve with pressure relief and slow closing as described in claim 1, characterized in that, The pressure relief valve (13) is connected to a pressure relief pipe (131), and the other end of the pressure relief pipe (131) is connected to the input flange (11). The pressure relief valve (13) and the pressure relief pipe (131) are connected to the input flange (11) and the output flange (12).
5. The three-way check valve with pressure relief and slow closing as described in claim 1, characterized in that, The damping hydraulic rod (21) is provided with an output end (211).
6. The three-way check valve with pressure relief and slow closing as described in claim 1, characterized in that, The valve disc (23) has a sleeve hole (231) which is sleeved on the outside of the output end (211). The valve disc (23) is in close contact with the valve seat (122) and the sealing ring (123).