Automatic stop valve
By using the valve stem to cooperate with the guide groove and return spring in the automatic shutoff valve, the problems of spring deformation and rust are solved, stable automatic closing and durability are achieved, and the reliability of the valve is improved.
Patent Information
- Application Number
- CN202421570596.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-07-04
AI Technical Summary
The springs of existing automatic check valves are easily deformed by water flow impact, which affects the use effect, and are prone to rust when exposed to liquid for a long time, resulting in unstable spring force.
An automatic shut-off valve is designed, which uses the fit of the valve stem with the guide groove and the return spring. The horizontal deformation of the return spring is limited through the guide groove, protects the spring from impact from water flow, and avoids liquid contact through the limiting block and sealing gasket, ensuring the stability and durability of the spring.
The stability and durability of the automatic closing function are achieved, the spring deformation and rust are avoided, and the valve's reliability and life are improved.
Smart Images
Figure CN223242173U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valves, in particular to an automatic stop valve. Background Art
[0002] The stop check valve is a multi-purpose valve that has the functions of both a stop valve and a check valve. Its structure is similar to that of a stop valve, but the valve stem and the valve disc are not fixedly connected. When the valve stem descends and presses the valve disc against the valve seat, it acts as a stop valve; after the valve stem rises, it acts as a check valve. On pipelines where both stop valves (or gate valves) and check valves need to be installed (such as the outlet end of a water pump), or in places where the installation position is restricted (such as ships), the use of stop check valves can save installation costs and space. Traditional stop check valves usually use two methods to check the valve. The first method requires the use of a valve stem and a valve disc. When the valve stem descends and presses the valve disc against the valve seat, it acts as a stop valve. Similarly, after the valve stem rises, it acts as a check valve. The second method requires the use of a valve core and a spring. The valve core is subjected to the reaction force of the spring, causing the valve to The core blocks the check circuit. When the water pressure is too high and reaches a level that can lift the valve core, water can flow through. Similarly, when the water pressure is too low, the valve core blocks the check circuit to achieve a cut-off effect. The first method requires on-site operation by relevant technical personnel, which affects the use effect and relatively increases the workload. The second method is automatic check processing, but when the spring is not limited, it is easily affected by the impact of water pressure, which causes the spring to deform, resulting in a deviation between the valve core and the sealing position, reducing the use effect of the automatic check valve.
[0003] The spring of an existing automatic check valve is usually exposed in the valve cavity and may be impacted by water flow, causing the spring deformation to fail to meet the set elastic force requirements. In addition, when the spring is frequently exposed to liquid, it is more likely to rust as it changes shape and comes into contact with the liquid. Summary of the Invention
[0004] In order to solve the above problems, the present invention provides the following solutions:
[0005] An automatic stop valve comprises a valve body, in which an inlet channel and an outlet channel interconnected are provided, and a valve disc is provided corresponding to the connection between the inlet channel and the outlet channel; the top of the valve body is sealed with a valve cover, the center of the bottom surface of the valve cover is provided with a guide groove, and the top of the guide groove side wall is provided with an exhaust hole; the top of the valve disc is fixedly connected to the valve stem, and the top of the valve stem is embedded in the guide groove and can slide along the guide groove; a return spring is also provided in the guide groove, the lower end of the return spring is connected to the top of the valve stem, and the upper end of the return spring is connected to the top of the guide groove.
[0006] Furthermore, a valve cover fixing hole is provided at the edge of the valve cover, and a valve body fixing hole is provided at the top surface of the valve body corresponding to the fixing hole. After the screw passes through the valve cover fixing hole and the valve body fixing hole, a fixing nut is screwed on to fix the valve cover and the valve body.
[0007] Furthermore, a limiting block is downwardly provided on the bottom surface of the valve cover, and a limiting groove is provided on the top surface of the valve body corresponding to the limiting block. When the valve cover and the valve body are fixed, the limiting block is embedded in the limiting groove.
[0008] Furthermore, a sealing gasket is laid on the bottom of the limiting groove.
[0009] Furthermore, a screw hole is downwardly provided on the top surface of the valve stem, and the bottom end of the return spring is screwed into the screw hole and connected to the valve stem.
[0010] The beneficial effects of the utility model are:
[0011] The automatic closing effect is achieved through the cooperation of the valve stem and valve cover through the guide groove and the return spring. When the water pressure in the water inlet channel exceeds the spring force plus the weight of the valve disc and valve stem, the valve disc is lifted, and the valve is opened. When the water pressure in the water inlet channel is less than the spring force, the return spring causes the valve disc to seal the connection between the water inlet and water outlet channels, and the valve is closed. The return spring is enclosed in the guide groove, which limits the horizontal deformation of the return spring and protects it from being impacted by the water flow, reducing horizontal bending of the return spring. The return spring force is selected to ensure that liquid entering the valve body does not reach the height of the vent, reducing the risk of rust on the return spring. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic structural diagram of the utility model.
[0013] 1. Valve body; 2. Valve cover; 3. Water inlet channel; 4. Water outlet channel; 5. Valve disc; 6. Valve stem; 7. Guide groove; 8. Exhaust hole; 9. Return spring; 10. Screw; 11. Fixing nut; 12. Limit block; 13. Limit groove. DETAILED DESCRIPTION
[0014] In order to make the purpose, technical solutions and advantages of the present application clearer, the present invention is further described in detail below in conjunction with the embodiments. In order to thoroughly understand the present invention, some specific details will be involved in the following description. In the absence of these specific details, the present invention can still be implemented, that is, those skilled in the art can more effectively introduce the essence of their work to other technicians in the field using these descriptions and statements here. In addition, it should be noted that it should be understood that the specific embodiments described herein are merely used to explain the present application and are not intended to limit the actual scope of protection. All raw materials used in the following examples are commercially available products.
[0015] Example 1: Figure 1As shown, an automatic stop valve comprises a valve body 1, in which an inlet channel 3 and an outlet channel 4 communicating with each other are provided, and a valve flap 5 is provided corresponding to the connecting portion of the inlet channel 3 and the outlet channel 4; the top of the valve body 1 is sealed with a valve cover 2, a guide groove 7 is provided at the center of the bottom surface of the valve cover 2, and an exhaust hole 8 is provided at the top of the side wall of the guide groove 7; the top of the valve flap 5 is fixedly connected to the valve stem 6, and the top of the valve stem 6 is embedded in the guide groove 7 and can slide along the guide groove 7; a return spring 9 is also provided in the guide groove 7, the lower end of the return spring 9 is connected to the top of the valve stem 6, and the upper end of the return spring 9 is connected to the top of the guide groove 7.
[0016] The valve cover 2 has a valve cover fixing hole defined on its edge, and a valve body fixing hole defined on the top surface of the valve body 1. A screw 10 passes through the valve cover fixing hole and the valve body fixing hole and is then threaded onto a fixing nut 11 to securely connect the valve cover 2 to the valve body 1. A downwardly disposed limit block 12 is provided on the bottom surface of the valve cover 2, and a limit groove 13 is defined on the top surface of the valve body 1 corresponding to the limit block 12. When the valve cover 2 and the valve body 1 are secured, the limit block engages within the limit groove 13. A sealing gasket is provided at the bottom of the limit groove 13. A downwardly disposed threaded hole is defined on the top surface of the valve stem 6, and the bottom end of the return spring 9 is threaded into the threaded hole to securely connect the valve stem 6.
[0017] The present invention achieves an automatic closing effect through the cooperation of the valve stem 1 and the valve cover 2 through the guide groove 7 and the return spring 9. When the water pressure in the water inlet channel 3 is higher than the elastic force of the return spring 9 plus the weight of the valve disc 5 and the valve stem 6, the valve disc 5 is lifted, and the valve is opened. When the water pressure in the water inlet channel 3 is lower than the elastic force of the return spring 9, the return spring 9 causes the valve disc 5 to seal the connection between the water inlet channel 3 and the water outlet channel 4, and the valve is closed. The return spring 9 is enclosed in the guide groove 7, which limits the horizontal deformation of the return spring 9 and protects the return spring 9, preventing the return spring 9 from being impacted by the water flow and reducing the horizontal bending of the return spring 9. The elastic force of the return spring 9 is selected to ensure that the liquid entering the valve body 1 does not reach the height of the exhaust hole 8, reducing the risk of rusting of the return spring 9.
[0018] Finally, it should be noted that the above examples are merely specific embodiments of the present invention. Obviously, the present invention is not limited to the above examples and is subject to numerous variations. All variations that can be directly derived or conceived by a person of ordinary skill in the art from the disclosure of the present invention should be considered within the scope of protection of the present invention.
Claims
1. An automatic stop valve, comprising a valve body, a water inlet channel and a water outlet channel interconnected with each other, a valve disc corresponding to the connection between the water inlet channel and the water outlet channel; and a valve cover covering the top of the valve body, characterized in that: A guide groove is provided at the center of the bottom surface of the valve cover, and an exhaust hole is provided at the top of the guide groove side wall; the top of the valve disc is fixedly connected to the valve stem, and the top of the valve stem is embedded in the guide groove and can slide along the guide groove; a return spring is also provided in the guide groove, the lower end of the return spring is connected to the top of the valve stem, and the upper end of the return spring is connected to the top of the guide groove.
2. An automatic stop valve as claimed in claim 1, characterized in that: The valve cover edge is provided with a valve cover fixing hole, and the valve body top surface is provided with a valve body fixing hole corresponding to the fixing hole. The screw passes through the valve cover fixing hole and the valve body fixing hole and is screwed with a fixing nut to fix the valve cover and the valve body.
3. An automatic stop valve as claimed in claim 2, characterized in that: A limiting block is downwardly arranged on the bottom surface of the valve cover, and a limiting groove is provided on the top surface of the valve body corresponding to the limiting block. When the valve cover and the valve body are fixed, the limiting block is embedded in the limiting groove.
4. An automatic stop valve as claimed in claim 3, characterized in that: A sealing pad is laid on the bottom of the limiting groove.
5. An automatic stop valve as claimed in claim 1, characterized in that: A screw hole is downwardly provided on the top surface of the valve stem, and the bottom end of the reset spring is screwed into the screw hole and connected with the valve stem.