One-way valve
The one-way valve core design driven by a permanent magnet and the coordination of the guide strip solve the problems of large hysteresis angle and low mechanical efficiency of the one-way valve in high-pressure rapid circulation systems, thus achieving efficient fluid control.
Patent Information
- Application Number
- CN202422529683.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-20
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-10-20
AI Technical Summary
Existing one-way valves have problems such as large valve core opening/closing hysteresis angle and low mechanical efficiency in systems with high pressure and rapid pressure cycling.
The valve core is driven by the magnetic attraction force between permanent magnets, and the sliding cooperation between the front guide strip, the rear guide strip, the valve body and the valve seat is combined to reduce friction and eliminate spring drive.
It improves the system volumetric efficiency and mechanical efficiency, reduces the response time of the valve core, and reduces the size requirement of the valve body's internal cavity.
Smart Images
Figure CN223375177U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of valves, and in particular relates to a one-way valve. Background Art
[0002] A check valve restricts fluid flow from port P to port T and is widely used in various types of engineering machinery. Currently, check valves are mainly divided into right-angle and straight-through types. They generally consist of a valve body, valve core, and valve seat. The valve body restricts the flow path of the fluid, while the valve core forms a seal with the valve body. Common sealing structures include flat seals and conical seals.
[0003] Existing one-way valves usually work with a valve core and a spring assembly. When the force acting on the valve core inlet is greater than the sum of the force acting on the valve core outlet and the spring force, the valve core of the one-way valve opens, and the fluid flows in from the P port and flows to the T port, and flows out of the one-way valve from the T port; when the force acting on the valve core inlet is less than the sum of the force acting on the valve core outlet and the spring force, the valve core of the one-way valve closes.
[0004] Existing check valves commonly experience a large spool opening / closing hysteresis angle in high-pressure systems with rapid pressure cycling, resulting in low system volumetric efficiency. Furthermore, the contact friction area between the spool and the valve seat or body during opening and closing of conventional check valves is large, resulting in low mechanical efficiency. The valve body cavity requires a significant axial dimension to accommodate the spool, spring, and seat. Furthermore, the spool is relatively heavy, resulting in slow response. Utility Model Content
[0005] The purpose of the utility model is to provide a one-way valve to solve the problem of low volumetric efficiency of the one-way valve.
[0006] The utility model is achieved through the following technical solutions:
[0007] A one-way valve comprises a valve body, a valve core and a valve seat;
[0008] The valve body is a cylindrical structure with openings at both ends, the valve seat is arranged at one end of the valve body, the valve body is provided with a liquid inlet, and the valve seat is provided with a liquid outlet;
[0009] The valve core is arranged in the valve body and can move in the valve body along the axis direction of the valve body;
[0010] A first permanent magnet is provided on the valve body, and a second permanent magnet is provided on the valve core. The magnetic attraction force between the first permanent magnet and the second permanent magnet can cause the valve core to move toward the liquid inlet and seal the liquid inlet; when the valve core moves toward the liquid outlet under the action of pressure, a flow channel connecting the liquid inlet and the liquid outlet is formed in the valve body.
[0011] In some embodiments, a front guide portion is provided on the valve core at one end facing the liquid inlet, and a first matching portion that matches the front guide portion is provided on the valve body. The front guide portion is provided in the first matching portion and forms a sliding fit with the first matching portion.
[0012] In some embodiments, the front guide portion includes a plurality of front guide strips arranged along the axial direction of the valve body, and the outer edges of the front guide strips are respectively slidably engaged with the first engaging portions.
[0013] In some embodiments, a first sealing surface is provided at one end of the valve core, and a second sealing surface is formed inside the valve body at one end of the first fitting portion. When the valve core moves toward the liquid inlet, the liquid inlet is sealed by the fitting between the first sealing surface and the second sealing surface.
[0014] In some embodiments, a rear guide portion is provided on the valve core at one end facing the liquid outlet, and a second matching portion that matches the rear guide portion is provided on the valve seat. The rear guide portion is provided in the second matching portion and slides with the second matching portion.
[0015] In some embodiments, the rear guide portion includes a plurality of rear guide strips arranged along the axial direction of the valve body, and the outer edges of the rear guide strips are respectively slidably engaged with the second engaging portions.
[0016] In some embodiments, a limiting structure is provided between the valve core and the valve seat for limiting the movement of the valve core toward the liquid outlet.
[0017] In some embodiments, the limiting structure includes a plurality of limiting strips arranged along the axial direction of the valve body and a limiting end surface located at one end of the second matching portion. When the valve core moves toward the liquid outlet, one end of the limiting strip can abut against the limiting end surface.
[0018] In some embodiments, the rear guide bars are respectively arranged at the ends of the limiting bars.
[0019] In some embodiments, the first permanent magnet is sleeved on one end of the valve body close to the liquid inlet, and / or the second permanent magnet is embedded on one end of the valve core close to the liquid inlet.
[0020] Compared with the prior art, the present invention has the following advantages and beneficial effects:
[0021] 1. The magnetic attraction between the first and second permanent magnets provides the valve with a shutoff force, thus avoiding the problem of a large valve core opening / closing hysteresis angle caused by the inherent characteristics of the second-order nonlinear system composed of the fluid, valve core, and spring when the valve core is conventionally driven to close by a spring. This ensures the system volumetric efficiency of the one-way valve under high pressure and rapid pressure cycling conditions.
[0022] 2. The valve core adopts front guide strips, rear guide strips to achieve sliding fit with the valve body and valve seat. The contact area is small and the friction during the operation is small, which improves the response speed and mechanical efficiency of the valve.
[0023] 3. By adopting magnetic attraction force, only the valve core needs to be set in the valve body, which reduces the size of the internal cavity of the valve body in the axial direction and improves the response speed of the valve opening / closing. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.
[0025] Figure 1 This is a schematic diagram of the one-way valve structure in an embodiment of the present utility model.
[0026] Figure 2 This is a cross-sectional view of a one-way valve in an embodiment of the present utility model.
[0027] Figure 3 This is a front view of the valve body in an embodiment of the present utility model.
[0028] Figure 4 This is a rear view of the valve body in an embodiment of the present utility model.
[0029] Figure 5 This is a schematic structural diagram of the first permanent magnet in an embodiment of the present utility model.
[0030] Figure 6 This is a schematic structural diagram of the second permanent magnet in an embodiment of the present utility model.
[0031] Figure 7 It is a front view of the valve core in the embodiment of the present utility model.
[0032] Figure 8 This is a rear view of the valve core in the embodiment of the present utility model.
[0033] Figure 9 This is a front view of the valve seat in an embodiment of the present utility model.
[0034] Figure 10 This is a rear view of the valve seat in the embodiment of the present utility model.
[0035] Figure 11 Schematic diagram of the relative position relationship of the permanent magnets when the valve core is at the closed and maximum open heights in an embodiment of the present invention.
[0036] Among them: 100-valve body, 101-liquid inlet, 102-first matching part, 103-second sealing surface, 200-first permanent magnet, 300-second permanent magnet, 400-valve core, 401-front guide strip, 402-first sealing surface, 403-rear guide strip, 404-limiting strip, 500-valve seat, 501-second matching part, 502-limiting end face. DETAILED DESCRIPTION
[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.
[0038] Example 1
[0039] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 7 , a one-way valve, comprising a valve body 100, a valve core 400 and a valve seat 500;
[0040] The valve body 100 is a cylindrical structure with openings at both ends. The valve seat 500 is provided at one end of the valve body. The valve body 100 is provided with a liquid inlet 101, and the valve seat 500 is provided with a liquid outlet.
[0041] The valve core 400 is disposed in the valve body and is capable of moving in the valve body along the valve body axis.
[0042] A first permanent magnet 200 is provided on the valve body 100, and a second permanent magnet 300 is provided on the valve core 400. The magnetic attraction force between the first permanent magnet 200 and the second permanent magnet 300 can make the valve core move toward the liquid inlet and block the liquid inlet 101; when the valve core 400 moves toward the liquid outlet under the action of pressure, a flow channel connecting the liquid inlet 101 and the liquid outlet is formed in the valve body 100.
[0043] The magnetic attraction force between the first permanent magnet 200 and the second permanent magnet 300 provides the valve with a closing force, thereby avoiding the problem of a large opening / closing hysteresis angle of the valve core 400 due to the inherent characteristics of the second-order nonlinear system composed of the fluid, the valve core 400 and the spring when the valve core 400 is conventionally driven to close by a spring, thereby ensuring the system volumetric efficiency of the one-way valve under high pressure and rapid pressure cycling.
[0044] In some embodiments, reference Figure 6A front guide portion is provided on the valve core at one end facing the liquid inlet, and a first matching portion 102 matching with the front guide portion is provided on the valve body 100. The front guide portion is arranged in the first matching portion and forms a sliding fit with the first matching portion 102.
[0045] In some embodiments, reference Figure 7 The front guide portion includes a plurality of front guide strips 401 arranged along the axial direction of the valve body, and the outer edges of the front guide strips are respectively slidably fitted with the first fitting portions 102.
[0046] In some embodiments, a first sealing surface 402 is provided at one end of the valve core, and a second sealing surface 103 is formed inside the valve body at one end of the first mating portion. When the valve core 400 moves toward the liquid inlet, the liquid inlet 101 is sealed by the mating between the first sealing surface 402 and the second sealing surface 103.
[0047] In some embodiments, reference Figure 8 A rear guide portion is provided on the valve core at one end facing the liquid outlet, and a second matching portion 501 matching with the rear guide portion is provided on the valve seat 500. The rear guide portion is provided in the second matching portion 501 and slides with the second matching portion 501.
[0048] In some embodiments, the rear guide portion includes a plurality of rear guide strips 403 arranged along the axial direction of the valve body, and the outer edges of the rear guide strips are respectively slidably engaged with the second engaging portions 501 .
[0049] The valve core 400 adopts the front guide strip 401 and the rear guide strip 403 to achieve sliding fit with the valve body 100 and the valve seat 500. The contact area is small and the friction during the operation is small, thereby improving the response speed and mechanical efficiency of the valve.
[0050] In some embodiments, a limiting structure is provided between the valve core 400 and the valve seat 500 for limiting the movement of the valve core 400 toward the liquid outlet.
[0051] In some embodiments, reference Figure 9 and Figure 10 The limiting structure includes a plurality of limiting strips 404 arranged along the valve body axis and a limiting end surface 502 located at one end of the second mating portion. When the valve core 400 moves toward the liquid outlet, one end of the limiting strip can abut against the limiting end surface 502. When the valve core 400 opens under pressure, it slides toward the liquid outlet. When the limiting strip 404 abuts against the limiting end surface 502, the movement of the valve core 400 is restricted, thereby limiting the maximum opening height of the valve core 400.
[0052] In some embodiments, the rear guide bars 403 are respectively disposed at the ends of the limiting bars 404 .
[0053] In some embodiments, the first permanent magnet 200 is sleeved on one end of the valve body close to the liquid inlet, and / or the second permanent magnet 300 is embedded on one end of the valve core close to the liquid inlet.
[0054] In some embodiments, reference Figure 3 A thread is provided on one end of the valve body close to the liquid inlet. The one-way valve can be connected to various pipelines through the thread on the valve body 100, or integrated into the valve block system.
[0055] In some embodiments, reference Figure 4 , the first permanent magnet 200 is an annular permanent magnet, which is sleeved on the outer circumference of the valve body; Figure 5 The second permanent magnet 300 is a columnar permanent magnet embedded in the valve core, which can further reduce the requirement on the size of the valve core 400.
[0056] By adopting the magnetic attraction force, only the valve core needs to be set in the valve body, which reduces the size of the internal cavity of the valve body in the axial direction and improves the response speed of the valve opening / closing.
[0057] The valve body 100 has a stepped structure, and a step structure is formed on the outer circumference of the valve body. When the first permanent magnet 200 is sleeved onto the valve body 100 , it can provide positioning for the installation of the first permanent magnet 200 .
[0058] The working process of the above-mentioned one-way valve is as follows:
[0059] When the fluid is stable, the valve core 400 can be stably maintained at a certain opening height under the combined action of the fluid force and the magnetic force; when the fluid is unstable, the inlet pressure of the valve core is lower than the outlet pressure, and the fluid flows back. At this time, the magnetic force between the first permanent magnet 200 and the second permanent magnet 300 can make the valve core 400 move toward the liquid inlet, reducing the backflow amount, realizing the rapid closing of the one-way valve, and improving the volumetric efficiency of the system.
[0060] Among them, reference Figure 11 When the one-way valve is closed, the distance between the end face of the first permanent magnet 200 facing the liquid inlet and the end face of the second permanent magnet facing the liquid inlet is l 1 When the one-way valve is open and the valve core 400 is at the maximum opening height, the distance between the end face of the first permanent magnet 200 facing the liquid inlet and the end face of the second permanent magnet facing the liquid inlet is l 2 .
[0061] The structure and material of the first permanent magnet 200, the second permanent magnet 300, the valve body 100, the valve core 400, and the valve seat 500 can be adjusted based on the environment in which the one-way valve is used, including characteristics such as system pressure, medium type, density, viscosity, temperature, and flow rate. The structure and material of the first permanent magnet 200, the second permanent magnet 300, the valve body 100, the valve core 400, and the valve seat 500 can be adjusted based on characteristics such as system pressure, medium type, density, viscosity, temperature, and flow rate.
[0062] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention falls within the scope of protection of the present invention.
Claims
1. A one-way valve, characterized in that: Including valve body, valve core and valve seat; The valve body is a cylindrical structure with openings at both ends, the valve seat is arranged at one end of the valve body, the valve body is provided with a liquid inlet, and the valve seat is provided with a liquid outlet; The valve core is arranged in the valve body and can move in the valve body along the axis direction of the valve body; A first permanent magnet is provided on the valve body, and a second permanent magnet is provided on the valve core. The magnetic attraction force between the first permanent magnet and the second permanent magnet can cause the valve core to move toward the liquid inlet and seal the liquid inlet; when the valve core moves toward the liquid outlet under the action of pressure, a flow channel connecting the liquid inlet and the liquid outlet is formed in the valve body.
2. The one-way valve according to claim 1, characterized in that: The valve core is provided with a front guide portion at one end facing the liquid inlet, and the valve body is provided with a first matching portion matching with the front guide portion. The front guide portion is arranged in the first matching portion and forms a sliding fit with the first matching portion.
3. The one-way valve according to claim 2, characterized in that: The front guide portion includes a plurality of front guide strips arranged along the axial direction of the valve body, and the outer edges of the front guide strips are respectively slidably engaged with the first engaging portions.
4. The one-way valve according to claim 2 or 3, characterized in that: A first sealing surface is provided at one end of the valve core, and a second sealing surface is formed inside the valve body at one end located at the first matching portion. When the valve core moves toward the liquid inlet, the liquid inlet is sealed by the matching between the first sealing surface and the second sealing surface.
5. The one-way valve according to any one of claims 1 to 3, characterized in that: The valve core is provided with a rear guide portion at one end facing the liquid outlet, and the valve seat is provided with a second matching portion matching with the rear guide portion. The rear guide portion is arranged in the second matching portion and slidably matches with the second matching portion.
6. The one-way valve according to claim 5, characterized in that: The rear guide portion includes a plurality of rear guide strips arranged along the axial direction of the valve body, and the outer edges of the rear guide strips are respectively slidably engaged with the second matching portions.
7. The one-way valve according to claim 6, characterized in that: A limiting structure is provided between the valve core and the valve seat for limiting the movement of the valve core toward the liquid outlet.
8. The one-way valve according to claim 7, characterized in that: The limiting structure includes a plurality of limiting strips arranged along the axis of the valve body and a limiting end surface located at one end of the second matching portion. When the valve core moves toward the liquid outlet, one end of the limiting strip can abut against the limiting end surface.
9. The one-way valve according to claim 8, characterized in that: The rear guide bars are respectively arranged at the ends of the limiting bars.
10. The one-way valve according to claim 1, wherein: The first permanent magnet is sleeved on one end of the valve body close to the liquid inlet, and / or the second permanent magnet is embedded on one end of the valve core close to the liquid inlet.