Two-stage slow-closing anti-disassembly axial-flow type check valve
By introducing a two-stage slow-closing structure and a retaining ring installation method into the axial flow check valve, the pipeline vibration and water hammer effect caused by rapid valve disc closure are solved, the intellectual property rights of the valve are protected, and a safe and reliable slow-closing effect is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-11
- Publication Date
- 2026-03-24
AI Technical Summary
Existing axial flow check valves lack a slow-closing function, which causes the valve disc to impact the valve seat sealing surface, resulting in pipeline vibration and water hammer effect. Furthermore, their complex structure or easy disassembly affects system safety and intellectual property protection.
A two-stage slow-closing, anti-disintegration axial flow check valve is designed. By setting a spring and a retaining ring between the valve disc and the valve disc support, the spring's rebound force and the medium pressure are used to achieve slow closure, preventing the valve disc from closing rapidly. The installation method of the retaining ring and the valve disc support prevents disintegration.
It achieves the valve's slow-closing function, reduces pipeline vibration and water hammer effect caused by impact on the sealing surface, protects the valve's intellectual property rights, and prevents the valve from being disassembled at will.
Smart Images
Figure CN121719950A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to a seawater desalination axial flow check valve, in particular to a two-stage slow-closing anti-disassembly axial flow check valve. BACKGROUND
[0002] The two-stage slow-closing anti-disassembly axial flow check valve is mainly applied to an energy recovery device in the field of seawater desalination, and is usually used in combination with two valves, one valve is opened, and the other valve is closed, and when medium in the device is reversed, the two-stage slow-closing anti-disassembly axial flow check valve plays a role in preventing the medium from flowing back.
[0003] The existing axial flow check valve has the following defects:
[0004] 1. The conventional axial flow check valve has a simple structure and basically does not have a slow-closing function; when the medium reversing valve in the device is closed, the metal of the sealing surface of the valve disc and the valve seat collides with a loud sound; the serious collision causes pipeline vibration, and long-term use will cause fatigue damage to the pipeline weld and the system architecture; and the water hammer effect caused by the rapid closing of the valve also damages the system pipeline and the pump.
[0005] 2. The axial flow check valve with a slow-closing structure has a relatively complex structure, and the slow-closing principle basically has two kinds; one is to increase an elastic element behind the valve seat, and when the valve is closed, the elastic element provides a rebound force when being compressed to prolong the time when the speed of the valve disc is reduced to zero during the closing process; however, this structure is limited by the internal space of the valve, and the rebound force provided by the elastic element is limited, and the slow-closing effect is good under low pressure, but the effect is not obvious under high pressure; the other structure is to install a damper outside the valve to hinder the rapid closing of the valve; this slow-closing axial flow check valve has a complex structure and is high in price, and the external damping device increases the risk of leakage of the valve.
[0006] 3. The valve rod support and the valve body are detachable structures, and the valve can be disassembled at will, which is not conducive to protecting the intellectual property rights of the valve manufacturer.
[0007] In view of the above, a two-stage slow-closing anti-disassembly axial flow check valve is urgently needed to solve the slow-closing defects and the disassembly deficiencies of the existing check valve. SUMMARY
[0008] In the following, a brief summary of the application is given to provide a basic understanding of some aspects of the application. It should be understood that this summary is not an exhaustive overview of the application. It is not intended to identify key or important parts of the application, nor is it intended to limit the scope of the application. Its purpose is only to give some concepts in a simplified form as a prelude to the more detailed description discussed later.
[0009] In view of this, in order to solve the slow closing defect and the problem of insufficient anti-disassembly of the check valve in the prior art, the application provides a two-stage slow closing anti-disassembly axial check valve.
[0010] A two-stage slow closing anti-disassembly axial check valve comprises a valve body, a valve clack, a stop block, a valve clack support and a ring.
[0011] The valve clack is slidingly installed in the valve body and the valve clack support, and the rear end is provided with the stop block.
[0012] The valve body is provided with a valve body slow closing groove and a valve body ring groove at the front and rear ends, respectively, and the ring is installed in the valve body ring groove.
[0013] The valve clack support is provided with a valve clack support slow closing groove and a valve clack support ring groove, and the valve clack support is installed in the valve body in cooperation with the ring through the valve clack support ring groove.
[0014] Further, the spring is arranged between the valve clack and the valve clack support.
[0015] Further, when the valve is closed to 80%, the stop block and the valve clack support slow closing groove form a first slow closing cavity.
[0016] Further, when the valve is closed to 88%, the front end of the valve clack and the valve body slow closing groove form a second slow closing cavity.
[0017] Further, when the pressure in the first slow closing cavity and the second slow closing cavity is balanced with the medium pressure in the valve body, the valve is closed.
[0018] Further, the ring is an elastic circular ring with an opening.
[0019] Further, after the valve is installed, there is no hole for disassembling the ring in the valve.
[0020] The application has the following beneficial effects relative to the prior art:
[0021] 1. The application has a simple structure, and the slow closing function is realized by relying on the structure of the valve. When the valve is closed, the valve clack can prevent the impact of the rapid closing of the valve clack on the sealing surface, thereby reducing the vibration of the pipeline and reducing the safety hazard.
[0022] 2. The application has a two-stage slow closing structure, which can avoid the impact of the water hammer effect caused by the sudden closing of the valve clack on the pipeline weld and the pump blades.
[0023] 3. The application can effectively prevent the valve from being disassembled at will by the installation mode of the ring cooperating with the valve clack support, thereby protecting the intellectual property rights of the valve manufacturer. BRIEF DESCRIPTION OF DRAWINGS
[0024] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
[0025] Figure 1 It is a structure diagram of a two-stage slow closing anti-disintegration axial flow check valve;
[0026] Figure 2 It is a structure diagram of a valve body;
[0027] Figure 3 It is a structure diagram of a valve clack support;
[0028] Figure 4 It is a position relationship diagram of a first slow closing cavity;
[0029] Figure 5 It is a position relationship diagram of a second slow closing cavity.
[0030] In the drawings: 1 - valve body, 2 - valve clack, 3 - stop block, 4 - spring, 5 - valve clack support, 6 - ring, 11 - valve body slow closing groove, 12 - valve body ring groove, 41 - valve clack support slow closing groove, 42 - valve clack support ring groove, 101 - first slow closing cavity, 42 - second slow closing cavity. DETAILED DESCRIPTION
[0031] In order to make the technical solutions and advantages of the embodiments of the present application clearer, the following further describes the exemplary embodiments of the present application with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than an exhaustive description of all embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.
[0032] Embodiments, with reference Figures 1-5 The present embodiment is a two-stage slow closing anti-disintegration axial flow check valve, which comprises a valve body 1, a valve clack 2, a stop block 3, a spring 4, a valve clack support 5 and a ring 6.
[0033] The valve clack 2 is slidingly installed in the valve body 1 and the valve clack support 5, and the rear end is provided with the stop block 3.
[0034] The valve body 1 is provided with a valve body slow closing groove 11 and a valve body ring groove 12 at the front and rear ends, respectively, and the ring 6 is installed in the valve body ring groove 12.
[0035] The valve clack support 5 is provided with a valve clack support slow closing groove 41 and a valve clack support ring groove 42, and the valve clack support 5 is installed in the valve body 1 in cooperation with the ring 6 through the valve clack support ring groove 42.
[0036] Further, the spring 4 is arranged between the valve clack 2 and the valve clack support 5.
[0037] Furthermore, when the valve is closed to 80%, the stop block 3 and the valve disc support slow-closing groove 41 form a first slow-closing chamber 101. As the valve closes, the volume of the first slow-closing chamber 101 decreases and the pressure increases, pushing the stop block 3 back and delaying the valve closing. The medium in the first slow-closing chamber 101 is discharged through the gap between the stop block 3 and the valve disc support 5.
[0038] Furthermore, when the valve is closed to 88%, the front end of the valve disc 2 and the valve body slow-closing groove 11 form a second slow-closing chamber 102. As the valve closes, the volume of the second slow-closing chamber 102 decreases and the pressure increases, which pushes the valve disc 2 back and delays the valve closing. The medium in the second slow-closing chamber 102 is discharged through the gap between the valve body 1 and the valve disc 2.
[0039] Furthermore, the valve closes when the pressure in the first slow-closing chamber 101 and the second slow-closing chamber 102 is balanced with the pressure of the medium inside the valve body 1.
[0040] Furthermore, the retaining ring 6 is an elastic ring with an opening; during installation, it is pressed into the retaining ring groove 42 of the valve disc bracket and installed into the valve body 1 together with the valve disc bracket 4. After installation, the retaining ring 6 springs open, with part of it embedded in the retaining ring groove 12 of the valve body and another part embedded in the retaining ring groove 42 of the valve disc bracket.
[0041] Furthermore, after the valve is installed, there are no holes inside or outside the valve for removing the retaining ring 6, to prevent the valve from being disassembled.
[0042] This invention achieves a slow-closing function by relying on the valve's own structure. When the valve is closed, it can prevent the impact of the valve disc closing rapidly on the sealing surface, which would cause pipeline vibration and reduce safety hazards. At the same time, this invention has a two-stage slow-closing structure to avoid the impact of water hammer effect caused by the sudden closure of the valve disc on the pipeline weld and pump blades.
[0043] The installation method of the retaining ring and valve disc bracket of this invention effectively prevents the valve from being disassembled at will, thus protecting the intellectual property rights of valve manufacturers.
[0044] Although the invention has been described with reference to a limited number of embodiments, those skilled in the art will understand from the foregoing description that other embodiments are conceivable within the scope of the invention described herein. Furthermore, it should be noted that the language used in this specification has been chosen primarily for readability and instructional purposes, and not for the purpose of interpreting or limiting the subject matter of the invention. Therefore, many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the appended claims. The disclosure of the invention is illustrative and not restrictive, and the scope of the invention is defined by the appended claims.
Claims
1. A two-stage slow-closing, anti-disintegration axial flow check valve, characterized in that, It includes a valve body (1), a valve disc (2), a stop block (3), a valve disc support (5), and a retaining ring (6); The valve disc (2) is slidably installed in the valve body (1) and valve disc bracket (5), and a stop block (3) is provided at the rear end. The valve body (1) is provided with a valve body slow-closing groove (11) and a valve body retaining ring groove (12) at the front and rear ends respectively, and the retaining ring (6) is installed in the valve body retaining ring groove (12); The valve support (5) is provided with a valve support slow-closing groove (41) and a valve support retaining ring groove (42). The valve support (5) is installed in the valve body (1) through the valve support retaining ring groove (42) and the retaining ring (6).
2. The two-stage slow-closing anti-disintegration axial flow check valve according to claim 1, characterized in that, A spring (4) is provided between the valve disc (2) and the valve disc support (5).
3. The two-stage slow-closing anti-disintegration axial flow check valve according to claim 1, characterized in that, When the valve is closed to 80%, the stop block (3) and the valve disc support slow-closing groove (41) form the first slow-closing chamber (101).
4. The two-stage slow-closing anti-disintegration axial flow check valve according to claim 3, characterized in that, When the valve is closed to 88%, the front end of the valve disc (2) and the valve body slow-closing groove (11) form a second slow-closing chamber (102).
5. The two-stage slow-closing anti-disintegration axial flow check valve according to claim 4, characterized in that, When the pressure in the first slow-closing chamber (101) and the second slow-closing chamber (102) is balanced with the pressure of the medium inside the valve body (1), the valve closes.
6. The two-stage slow-closing anti-disintegration axial flow check valve according to claim 1, characterized in that, The retaining ring (6) is an elastic ring with an opening.
7. The two-stage slow-closing anti-disintegration axial flow check valve according to claim 6, characterized in that, After the valve is installed, there are no holes for removing the retaining ring (6) inside or outside the valve.