Pressure stabilizing check valve
By designing the pressure relief and speed reduction components of the pressure-stabilizing check valve, the problem of sudden increase in flow velocity and impact during medium backflow was solved, achieving pressure balance and sealing, and reducing pipeline damage and leakage risks.
Patent Information
- Application Number
- CN202522427833.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-17
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-11-17
AI Technical Summary
When the medium flows back, the spring in the existing check valve rebounds rapidly, causing a sudden increase in fluid velocity and creating a reverse impact, which leads to pipeline fatigue damage and fluid leakage.
A pressure-stabilizing check valve was designed, comprising a pressure relief component and a speed reduction component. Through the built-in ring, spring, rubber ring and guide post, it achieves rapid pressure relief and flow rate control, avoids rapid rebound of the valve core, and balances the pressure environment.
It effectively blocks the backflow of the medium, avoids sudden increases in flow velocity and reverse impact, reduces pipeline fatigue damage, lowers the risk of fluid leakage, and ensures stable system operation.
Smart Images
Figure CN223690416U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to check valve technical field, concretely is a kind of steady pressure check valve. BACKGROUND
[0002] Check valve is a kind of valve that is opened and closed automatically by medium flow or pressure difference, and its core function is to prevent the fluid in the pipeline from flowing backward, to ensure the fluid to be transported in a preset direction, and it does not need manual or external power control. When the fluid flows forward, its pressure will push the valve core, valve flap and other components inside the valve to open the channel. Once the fluid flows in the reverse direction, the valve core or valve flap will automatically close under the action of reverse pressure and its own gravity, blocking the reverse flow path. It is widely used in water supply and drainage, heating, chemical industry, gas and other fluid conveying systems, and plays a role in protecting equipment and stabilizing system operation.
[0003] Check valve pressure stabilizing device is a fluid system component integrating check function and pressure stabilizing function. Its core function is to prevent the fluid in the pipeline from flowing backward while automatically adjusting the fluid pressure in the system. It blocks the reverse flow path through the internal check structure to avoid the impact of medium backflow on equipment or system. At the same time, with the help of built-in pressure regulating mechanism, such as spring, it senses the change of system pressure and adjusts it in real time to stabilize the pressure in the preset range. It not only solves the problem of simple check valve that cannot stabilize pressure, but also avoids the abnormal operation of system caused by pressure fluctuation. It is widely used in water supply and drainage, gas, industrial fluid conveying and other scenes to ensure the safe and stable operation of the system.
[0004] The prior art relieves the impact of medium in the check valve by spring. When the system pressure drops, the spring releases elastic potential and pushes the valve core to rebound quickly. This process will instantaneously reduce the flow passage area, causing the fluid flow rate to increase rapidly and form a reverse impact, thereby destroying the stability of the pressure reduction process. Long-term repeated impact will gradually cause fatigue damage to the pipeline, eventually leading to fluid leakage problem. Therefore, a steady pressure check valve is proposed to solve the above problems. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing a steady pressure check valve to solve the problems raised in the background technology.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:
[0007] A kind of pressure-stabilizing check valve, including check valve assembly, the check valve assembly outer fixedly connected with pressure relief assembly, the pressure relief assembly rear end is equipped with speed reduction assembly, the pressure relief assembly includes pressure relief shell, the pressure relief shell inner side is fixedly connected with built-in ring, the pressure relief shell front end is equipped with fixed mouth, the built-in ring front end is fixedly connected with first spring, the first spring front end is fixedly connected with built-in column, the built-in column outer side is fixedly connected with first rubber ring, the built-in ring rear end is fixedly connected with second spring, the second spring rear end is fixedly connected with round plate, the round plate front end is fixedly connected with second rubber ring, the round plate inner side is equipped with flow limiting hole, the round plate and pressure relief shell sliding fit.
[0008] As the further optimization of the utility model, wherein: the check valve assembly includes check valve body, the check valve body is equipped with pressure relief port near the rear end of valve flap, the pressure relief port is communicated with the inside of check valve body, the rear end of check valve body is fixedly connected with connecting pipe and fixed disc in sequence, the connecting pipe outer side is fixedly connected with expansion sheet.
[0009] As the further optimization of the utility model, wherein: the expansion sheet is fixed at the rear end of pressure relief shell, the expansion sheet inner side is equipped with guide hole, the guide hole inner side is slidingly connected with guide column.
[0010] As the further optimization of the utility model, wherein: the guide column is fixedly connected at the front end of round plate, the guide column front end is fixedly connected with anti-drop block, the second rubber ring can be tightly attached to the rear end of expansion sheet, and the second rubber ring is located at the periphery of flow limiting hole.
[0011] As the further optimization of the utility model, wherein: the check valve body outer side is fixedly connected with the front end of pressure relief shell, the fixed mouth of pressure relief shell is sleeved on the outside of pressure relief port, and the guide hole is communicated with the inside of pressure relief shell through fixed mouth.
[0012] As the further optimization of the utility model, wherein: the inside of built-in ring is hollow structure, the built-in column slides in the inside of pressure relief shell, and the first rubber ring outer side is attached to the inside of pressure relief shell.
[0013] As the further optimization of the utility model, wherein: the round plate and connecting pipe are gap fit, and the connecting pipe keeps the tendency of moving forward by the tension of second spring.
[0014] Compared with the prior art, the utility model has the advantages that:
[0015] The utility model discloses a pressure relief assembly and speed reduction assembly are set up, this check valve pressure stabilizing device can effectively block medium backflow, realizes quick pressure relief when medium backflow causes instantaneous pressure increase, balances valve body internal pressure environment, can avoid the fluid flow rate sudden increase and reverse impact caused by the quick rebound of valve core simultaneously, improves pressure balance stability, reduces the fatigue damage of pipeline because of long -term repeated impact significantly, reduces the fluid leakage risk, further guarantees check valve use safety and system stable operation. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is whole structure schematic diagram of the utility model;
[0017] Figure 2 It is sectional structure schematic diagram of check valve assembly of the utility model;
[0018] Figure 3 It is check valve body structure schematic diagram of the utility model;
[0019] Figure 4 It is sectional structure schematic diagram of pressure relief assembly of the utility model;
[0020] Figure 5 It is pressure relief shell structure schematic diagram of the utility model;
[0021] Figure 6 It is speed reduction assembly structure schematic diagram of the utility model;
[0022] Figure 7 It is built -in column structure schematic diagram of the utility model.
[0023] In the drawing: 1, check valve assembly;11, check valve body;12, pressure relief port;13, connecting pipe;14, fixed disc;
[0024] 2, pressure relief assembly;21, pressure relief shell;22, built -in ring;23, guide hole;24, expansion piece;25, fixed port;26, built -in column;27, first spring;28, first rubber ring;
[0025] 3, speed reduction assembly;31, round plate;32, guide column;33, anti -drop block;34, flow limiting hole;35, second rubber ring;36, second spring. DETAILED DESCRIPTION
[0026] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the range of protection of the utility model.
[0027] It is to be noted that the terms used herein are merely for describing specific embodiments and are not intended to limit exemplary embodiments according to the present application. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise, and it will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.
[0028] Referring to Figures 1-7 The utility model provides a technical scheme:
[0029] A kind of pressure-stabilizing check valve, including check valve component 1, check valve component 1 outer side fixedly connected with pressure relief component 2, pressure relief component 2 rear end is equipped with speed reduction component 3, pressure relief component 2 includes pressure relief shell 21, pressure relief shell 21 inner side fixedly connected with built-in ring 22, pressure relief shell 21 front end is equipped with fixed mouth 25, built-in ring 22 front end fixedly connected with first spring 27, first spring 27 front end fixedly connected with built-in column 26, built-in column 26 outer side fixedly connected with first rubber ring 28, built-in ring 22 rear end fixedly connected with second spring 36, second spring 36 rear end fixedly connected with round plate 31, round plate 31 front end fixedly connected with second rubber ring 35, round plate 31 inner side is equipped with flow limiting hole 34, and round plate 31 and pressure relief shell 21 are slidably connected.
[0030] As the further implementation of the scheme, check valve component 1 includes check valve body 11, check valve body 11 is equipped with pressure relief port 12 close to the rear end of valve flap, pressure relief port 12 is communicated with the inside of check valve body 11, check valve body 11 rear end is sequentially fixedly connected with connecting pipe 13 and fixed disc 14, connecting pipe 13 outer side is fixedly connected with expansion sheet 24, by the above setting, provide quick flow channel for the instant pressure increase when medium backflow is caused, ensure that medium can be introduced into pressure relief structure in time, provide basis for fast pressure relief, balance pressure in valve body, avoid that local pressure is too high to cause impact to valve body, and the fixed connection of connecting pipe 13 and expansion sheet 24 provides stable installation support for pressure relief component 2, ensure that structure does not deviate during pressure relief process, improve the reliability of pressure regulation;
[0031] As the further implementation of the scheme, expansion sheet 24 is fixed at the rear end of pressure relief shell 21, expansion sheet 24 inner side is equipped with guide hole 23, guide hole 23 inner side is slidably connected with guide column 32, by the above setting, guide hole 23 provides accurate sliding guide for guide column 32, ensure that round plate 31 can move smoothly, avoid that there is jam when pressure relief or reset, guarantee fast pressure relief and sealing reset;
[0032] As a further implementation of the present scheme, the guide column 32 is fixedly connected to the front end of the circular plate 31, the anti-dropping block 33 is fixedly connected to the front end of the guide column 32, and the second rubber ring 35 is tightly attached to the rear end of the expansion sheet 24. The second rubber ring 35 is located outside the flow limiting hole 34. Through the above arrangement, the anti-dropping block 33 plays a role in preventing the circular plate 31 from moving excessively and separating from the assembly position. The tight design of the second rubber ring 35 and the rear end of the expansion sheet 24 can achieve reliable sealing and prevent medium leakage after pressure relief, thereby ensuring the sealing performance of the device.
[0033] As a further implementation of the present scheme, the check valve body 11 is fixedly connected to the front end of the pressure relief shell 21, the fixed port 25 of the pressure relief shell 21 is sleeved outside the pressure relief port 12, and the guide hole 23 communicates with the inside of the pressure relief shell 21 through the fixed port 25. Through the above arrangement, the structure realizes stable assembly of the check valve body 11 and the pressure relief shell 21. The fixed port 25 ensures smooth introduction of the medium from the pressure relief port 12 into the inside of the pressure relief shell 21, making the pressure relief channel continuous and unobstructed, and ensuring that the pressure relief can be quickly started when the pressure is instantaneously increased.
[0034] As a further implementation of the present scheme, the inside of the built-in ring 22 is a hollow structure, the built-in column 26 slides inside the pressure relief shell 21, and the outside of the first rubber ring 28 is attached to the inside of the pressure relief shell 21. Through the above arrangement, the hollow structure of the built-in ring 22 provides a channel for gas discharge, and in combination with the sealing effect of the first rubber ring 28, it ensures that the built-in column 26 can effectively extrude gas when moving, thereby achieving pressure relief buffering. At the same time, the sealing performance of the first rubber ring 28 avoids medium leakage, thereby ensuring stable and controllable pressure relief process.
[0035] As a further implementation of the present scheme, the circular plate 31 is gap-fitted with the connecting pipe 13, and the connecting pipe 13 has a tendency to move forward under the tension of the second spring 36. Through the above arrangement, the tension of the second spring 36 enables the circular plate 31 to quickly reset and maintain a sealed state, thereby controlling the moving speed of the built-in column 26 by controlling the flow rate of the gas, avoiding fluid impact caused by rapid rebound of the built-in column 26, and improving pressure stability.
[0036] Workflow: In use, the front end of the check valve body 11 is fixed with the pipeline through the flange plate, the fixed disc 14 is fixed with the pipeline, the medium flows backward through the front end of the check valve body 11, and after passing through the valve flap inside the check valve assembly 1, the valve flap inside the check valve body 11 is opened by the impact of the medium, and then flows to the rear end of the pipeline through the connecting pipe 13 and the fixed disc 14. The valve flap inside the check valve body 11 can prevent the medium from flowing from the rear to the front.
[0037] When the medium backflows, the valve flap inside the check valve body 11 is closed under pressure, and the pressure inside the check valve body 11 near the rear end of the valve flap increases instantaneously. Under the action of the pressure, the medium enters the inside of the pressure relief shell 21 through the pressure relief port 12 and the fixed port 25. Before that, the first spring 27 pushes the built-in column 26 by the elastic force, and the built-in column 26 is kept in the front position of the pressure relief shell 21. When the pressure inside the pressure relief shell 21 increases instantaneously, the built-in column 26 moves backward due to the sealing of the first rubber ring 28 on the built-in column 26 and the pressure relief shell 21. At this time, the built-in column 26 presses the first spring 27, and at the same time pushes the gas inside the rear end of the pressure relief shell 21 through the built-in ring 22. The circular plate 31 is sealed by the second rubber ring 35 on the circular plate 31 and the expansion piece 24 by the pulling force of the second spring 36 before that. The pressure is large, and at this time the circular plate 31 moves away from the expansion piece 24. The circular plate 31 drives the guide column 32 and the anti-dropping block 33 to move. The guide column 32 plays a guiding role when the circular plate 31 moves. The second spring 36 is stretched by the pulling force of the circular plate 31. At this time, the effect of rapid pressure relief inside the check valve body 11 is realized, so as to balance the pressure environment inside the check valve body 11. After the impact of the medium backflow disappears, the circular plate 31 is quickly reset by the pulling force of the second spring 36. The second rubber ring 35 seals the circular plate 31 and the expansion piece 24. The stroke of the circular plate 31 is short, and the elastic coefficient of the second spring 36 is twice that of the first spring 27. The circular plate 31 can be sealed with the expansion piece 24 first. At this time, the built-in column 26 moves forward by the elastic force of the first spring 27, and the external air enters the inside of the pressure relief shell 21 through the flow limiting hole 34. The flow limiting hole 34 plays a role in limiting the flow rate of the gas, so as to prevent the built-in column 26 from rebounding quickly, causing the fluid flow rate to increase suddenly and forming a reverse impact, improving the stability of the pressure balance, and significantly reducing the fatigue damage of the pipeline caused by long-term repeated impact, improving the safety of the check valve.
[0038] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the present application. The scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A pressure retaining check valve comprising a check valve assembly (1), characterized in that: The check valve assembly (1) is fixedly connected with a pressure relief assembly (2) outside, and a speed reduction assembly (3) is installed at the rear end of the pressure relief assembly (2); The pressure relief assembly (2) comprises a pressure relief shell (21), the inner side of the pressure relief shell (21) is fixedly connected with an inner ring (22), a fixed port (25) is formed at the front end of the pressure relief shell (21), the front end of the inner ring (22) is fixedly connected with a first spring (27), the front end of the first spring (27) is fixedly connected with an inner column (26), and the outer side of the inner column (26) is fixedly connected with a first rubber ring (28); The rear end of the inner ring (22) is fixedly connected with a second spring (36), the rear end of the second spring (36) is fixedly connected with a circular plate (31), the front end of the circular plate (31) is fixedly connected with a second rubber ring (35), a flow limiting hole (34) is formed in the inner side of the circular plate (31), and the circular plate (31) and the pressure relief shell (21) are in sliding fit.
2. A pressure maintaining check valve according to claim 1, wherein: The check valve assembly (1) comprises a check valve body (11), a pressure relief port (12) is formed at the rear end of the check valve body (11) close to the valve disc, the pressure relief port (12) is in communication with the inside of the check valve body (11), and the rear end of the check valve body (11) is fixedly connected with a connecting pipe (13) and a fixed disc (14) in sequence.
3. A pressure maintaining check valve according to claim 2, wherein: The expansion sheet (24) is fixed at the rear end of the pressure relief shell (21), a guide hole (23) is formed in the inner side of the expansion sheet (24), and a guide column (32) is in sliding connection with the inner side of the guide hole (23).
4. A pressure maintaining check valve according to claim 3, wherein: The guide column (32) is fixedly connected at the front end of the circular plate (31), the front end of the guide column (32) is fixedly connected with an anti-dropping block (33), the second rubber ring (35) is tightly attached to the rear end of the expansion sheet (24), and the second rubber ring (35) is located at the periphery of the flow limiting hole (34).
5. A pressure maintaining check valve according to claim 3, wherein: The outer side of the check valve body (11) is fixedly connected with the front end of the pressure relief shell (21), the fixed port (25) formed in the pressure relief shell (21) is sleeved outside the pressure relief port (12), and the guide hole (23) is in communication with the inner side of the pressure relief shell (21) through the fixed port (25).
6. A pressure maintaining check valve according to claim 5, wherein: The inner side of the inner ring (22) is a hollow structure, the inner column (26) slides in the pressure relief shell (21), and the outer side of the first rubber ring (28) is attached to the inner side of the pressure relief shell (21).
7. A pressure maintaining check valve according to claim 1, wherein: The circular plate (31) and the connecting pipe (13) are in clearance fit, and the connecting pipe (13) has a tendency to move forward under the tension of the second spring (36).