Bypass valve with novel sealing mode
By setting a sealing surface on the periphery of the bypass valve core and forming a planar seal structure with the preload force of the spring, the problem of leakage caused by deformation of the existing bypass valve seal is solved, and an efficient sealing effect is achieved.
Patent Information
- Application Number
- CN202421280740.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-06-06
AI Technical Summary
During the repeated switching of the existing new sealing valve, the elastic seal is prone to plastic deformation and leakage, which cannot meet the needs of high-performance seals.
A sealing method is adopted in which a circle of sealing surfaces bulges on the outer periphery of the valve core matches the inner wall of the valve cylinder, and combined with the preloading force of the spring, a planar sealing structure is formed to prevent fluid leakage.
Effectively prevent fluid leakage, improve sealing effect, reduce deformation risks, and meet high-performance sealing needs.
Smart Images
Figure CN222437129U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydraulic bypass valves, in particular to a bypass valve with a novel sealing method. Background Art
[0002] A bypass valve is a device used to provide an alternate flow path in a hydraulic system. It changes the flow path of the fluid (including gas or liquid) in the pipeline, thereby providing a bypass flow path to reduce the system pressure when the main oil line is blocked and the system pressure is too high to ensure the continuous operation of the system. The bypass valve is usually composed of a valve body, a spring, and a valve core. The valve body is controlled by the system pressure to allow or prevent the fluid from passing through the bypass route. Therefore, seals or other sealing methods are required to reduce leakage when the bypass valve is closed.
[0003] However, the existing bypass valve with a new sealing method has the following problems during use: the bypass valve relies on a traditional elastic seal, which will cause plastic deformation of the elastic seal when the bypass valve is repeatedly opened and closed, resulting in leakage, and cannot meet the high-performance sealing requirements. Therefore, it is necessary to design a corresponding technical solution to solve the existing technical problems. Utility Model Content
[0004] The purpose of the utility model is to provide a bypass valve with a new sealing method, which solves the technical problems raised in the background technology and meets the actual use requirements.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: comprising a valve cylinder, a fluid channel is arranged in the middle of the interior of the valve cylinder, a valve core is arranged at the bottom position of the fluid channel, a valve cover is arranged on the top of the valve cylinder, a connecting middle tube is arranged in the middle position of the valve cover, a spring is arranged between the bottom of the connecting middle tube and the valve core, a sealing surface is arranged on the outer edge of the valve core, and a sealing coil is arranged on the bottom of the valve core.
[0006] As a preferred embodiment of the present utility model, the valve cylinder has an inclined structure in a portion near the top end, the cross-section of the top end of the valve cylinder has a "T"-shaped structure, a connecting groove is provided on the bottom of the valve cover, and the top end of the valve cylinder is located in the connecting groove.
[0007] As a preferred embodiment of the utility model, the middle part of the valve core is convex, and a positioning groove is provided on the side of the valve core facing the spring.
[0008] As a preferred implementation of the utility model, the sealing surface is tightly attached to the inner wall of the valve cylinder, and a part of the spring is sleeved on the connecting middle tube.
[0009] As a preferred implementation of the present invention, the sealing coil is tightly pressed against the valve cylinder.
[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0011] By optimizing the sealing method between the valve core and the valve cylinder, the sealing effect can be effectively guaranteed. Compared with the ordinary bypass valve, the uniqueness of the utility model lies in its sealing method. Specifically, a sealing surface is raised on the periphery of the valve core, and the sealing surface matches the sealing layer on the valve cylinder. Under the preload force of the spring, the sealing surface of the valve core is tightly pressed on the sealing surface of the valve seat to form a plane sealing structure. This sealing method is not only simple in structure, but also has excellent sealing effect and can effectively prevent fluid leakage. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is an overall schematic diagram of the utility model.
[0013] In the figure: valve cylinder-1, valve core-2, spring-3, valve cover-4, connecting middle tube-5, connecting groove-6, sealing coil-7, fluid channel-8, sealing surface-9. DETAILED DESCRIPTION
[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0015] See also Figure 1 The utility model provides a technical solution: a bypass valve with a new sealing method, comprising: a valve cylinder 1, a fluid channel 8 is arranged in the middle of the valve cylinder 1, a valve core 2 is arranged at the bottom of the fluid channel 8, a valve cover 4 is arranged on the top of the valve cylinder 1, a connecting middle pipe 5 is arranged in the middle of the valve cover 4, a spring 3 is arranged between the bottom of the connecting middle pipe 5 and the valve core 2, a sealing surface 9 is arranged on the outer edge of the valve core 2, and a sealing coil 7 is arranged on the bottom of the valve core 2.
[0016] As a further improvement, the valve cylinder 1 has an inclined structure at a portion near the top end, the cross-section of the top end of the valve cylinder 1 has a "T"-shaped structure, a connecting groove 6 is provided on the bottom of the valve cover 4, and the top end of the valve cylinder 1 is located in the connecting groove 6.
[0017] As a further improvement, the middle portion of the valve core 2 is convex, and a positioning groove is provided on the side of the valve core 2 facing the spring 3 .
[0018] As a further improvement, the sealing surface 9 is in close contact with the inner wall of the valve cylinder 1 , and a part of the spring 3 is sleeved on the connecting middle tube 5 .
[0019] In a further improvement, the sealing coil 7 is tightly pressed on the valve cylinder 1. Specifically, in this solution, except for the spring 3, other parts of the bypass valve are made of PA6 material, which has high strength and corrosion resistance. Therefore, the sealing surface of the valve core 2 also has high corrosion resistance and strength, and there is no need to worry about deformation during use causing leakage of the bypass valve. Moreover, most of the bypass valve is made of plastic material, which reduces the overall weight and is easy to install and maintain.
[0020] During use: After the utility model is installed on the hydraulic pipe in the hydraulic system, if the system pressure is less than the preload force, a sealing surface 9 is raised on the periphery of the valve core 2 to match the sealing surface on the valve cylinder 1. Under the preload force of the spring 3, the sealing surface 9 of the valve core 2 and the sealing coil 7 are tightly pressed against the sealing layer of the valve cylinder 1 to form a planar sealing structure, which can effectively prevent fluid leakage. When the system pressure is greater than the preload force, the fluid squeezes the spring 3 to compress the spring 3, thereby driving the valve core 2 to move, thereby increasing the distance between the valve core 2 and the valve cylinder 1, that is, the bypass valve is opened to achieve the bypass function.
[0021] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A bypass valve with a new sealing method, characterized in that: The invention comprises a valve cylinder (1), a fluid channel (8) is arranged in the middle of the valve cylinder (1), a valve core (2) is arranged at the bottom of the fluid channel (8), a valve cover (4) is arranged on the top of the valve cylinder (1), a connecting middle tube (5) is arranged in the middle of the valve cover (4), a spring (3) is arranged between the bottom of the connecting middle tube (5) and the valve core (2), a sealing surface (9) is arranged on the outer edge of the valve core (2), and a sealing coil (7) is arranged on the bottom of the valve core (2).
2. A bypass valve with a new sealing method according to claim 1, characterized in that: The valve cylinder (1) has an inclined structure at a portion near the top end, and the cross section of the top end of the valve cylinder (1) has a "T"-shaped structure. A connecting groove (6) is provided on the bottom of the valve cover (4), and the top end of the valve cylinder (1) is located in the connecting groove (6).
3. A bypass valve with a new sealing method according to claim 1, characterized in that: The middle part of the valve core (2) is convex, and a positioning groove is provided on the side of the valve core (2) facing the spring (3).
4. A bypass valve with a new sealing method according to claim 1, characterized in that: The sealing surface (9) is tightly attached to the inner wall of the valve cylinder (1), and a portion of the spring (3) is sleeved on the connecting middle tube (5).
5. A bypass valve with a new sealing method according to claim 1, characterized in that: The sealing coil (7) is tightly pressed against the valve cylinder (1).