One-way valve of oil cylinder
By adopting a combined structure of valve body, valve seat, elastic plate and rubber sealing ring in the oil cylinder check valve, the problem of oil leakage in the existing check valve is solved, and better sealing effect and overload protection function are achieved.
Patent Information
- Application Number
- CN202421185294.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-05-28
AI Technical Summary
The existing oil cylinder check valves have poor fit between the steel ball and the cone surface, which affects its function and loses the overload protection function in the rotating cylinder.
A oil cylinder check valve is designed, adopting a combined structure of the valve body, valve seat, elastic pressure plate and rubber sealing ring. Through the cooperation of the elastic pressure plate and the return spring, the valve plate and the valve seat can be sealed and reset to avoid oil leakage.
It effectively avoids oil leakage and oil seepage, ensures the sealing effect of the check valve, and restores its overload protection function in the rotary oil cylinder.
Smart Images
Figure CN222596434U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of one-way valves, in particular to an oil cylinder one-way valve. Background Art
[0002] A cylinder check valve is a valve used to control the direction of hydraulic oil flow in a cylinder. The basic function of a check valve is to allow oil to flow in one direction, usually from the hydraulic pump to the cylinder, while preventing the oil from flowing back to the hydraulic pump, thereby causing damage or unnecessary pressure loss.
[0003] Most of the existing one-way valves are steel ball structures. The one-way valve is a match between a steel ball and a conical surface, or a match between the steel conical surface and a sharp right angle. The spherical surface of the steel ball and the conical surface of the one-way valve body do not match well, or the steel conical surface and the sharp right angle do not match well, and oil leakage occurs, thereby affecting the function of the one-way valve and losing its overload protection function in the rotary cylinder. Utility Model Content
[0004] The purpose of the utility model is to provide a cylinder check valve to solve the problems raised in the above background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cylinder one-way valve, comprising: a valve body, a liquid inlet and a liquid outlet, a buffer cavity is provided on one side of the middle part of the valve body, a valve seat is provided on the inner wall of the valve body close to the liquid inlet, an elastic pressure plate is provided on one side of the inner wall of the buffer cavity, a telescopic rod is provided at one end of the elastic pressure plate, a valve plate is provided at one end of the fixed section of the telescopic rod, a rubber sealing ring is provided on one side of the valve plate, the rubber sealing ring is in the shape of a funnel with a larger diameter at one end and a smaller diameter at the other end, and the outer wall of the rubber sealing ring at the end with a larger diameter contacts the inner wall of the valve body.
[0006] Furthermore, one end of the fixed section of the telescopic rod is fixedly connected to the center of the valve plate, and the other end is fixedly connected to the elastic pressure plate. One end of the movable section of the telescopic rod is provided with an end plate, and a return spring is provided between the end plate and the elastic pressure plate.
[0007] Furthermore, a pressure rod is provided on the inner wall of the rubber sealing ring, and a connecting rod is provided between the middle part of the pressure rod and the end plate.
[0008] Furthermore, one end of the connecting rod is hinged to the pressure rod, and the other end is hinged to the end plate.
[0009] Furthermore, there are three pressure rods, which are evenly arranged circumferentially on the inner wall of the rubber sealing ring, and gaps are left between the two ends of the three pressure rods.
[0010] Furthermore, a cover plate is provided on the outer wall of the valve body at the outer end of the buffer cavity.
[0011] Compared with the prior art, the beneficial effects of the utility model are:
[0012] The utility model realizes that when the oil cylinder non-return valve is used, the hydraulic oil of the oil cylinder enters through the liquid inlet of the non-return valve, the oil with pressure overcomes the elastic force of the elastic pressure plate, so that the valve plate and the valve seat are separated, and the oil flows out to the liquid outlet through the gap between the valve plate and the valve seat. During the oil outflow process, the oil will generate an impact force on the rubber sealing ring, so that the rubber sealing ring will produce elastic deformation to retract toward the middle, drive the pressure rod to squeeze the connecting rod so that the end plate moves to the side away from the valve plate. When the pressure of the oil inlet closing the liquid inlet disappears, the elastic force of the elastic pressure plate drives the valve plate to be pressed against the valve seat to realize the closing of the one-way valve. The plane design of the valve plate and the valve seat makes the contact area between the two large to avoid oil leakage. At the same time, the reset spring will drive the end plate to move to one side of the valve plate under its own elastic force, so that the connecting rod generates pressure on the pressure rod, and the rubber sealing ring is pressed against the inner wall of the valve body through the pressure rod, so as to perform secondary sealing on the outer side of the valve plate to ensure a good sealing effect of the valve plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a three-dimensional diagram of a cylinder check valve of the utility model;
[0014] Figure 2 This is a main sectional view of a cylinder check valve of the utility model;
[0015] Figure 3 It is an enlarged schematic diagram of a valve plate connection structure of a cylinder check valve of the utility model;
[0016] Figure 4 This is a front view of an oil cylinder one-way valve of the utility model.
[0017] In the figure: 1. valve body; 2. liquid inlet; 3. liquid outlet; 4. buffer chamber; 5. cover plate; 6. valve seat; 7. elastic pressure plate; 8. telescopic rod; 9. end plate; 10. return spring; 11. valve plate; 12. rubber sealing ring; 13. pressure rod; 14. connecting rod. DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0019] See also Figure 1-Figure 4The utility model provides a technical solution: a cylinder one-way valve, comprising: a valve body 1, a liquid inlet 2 and a liquid outlet 3, a buffer chamber 4 is provided on one side of the middle part of the valve body 1, a valve seat 6 is provided on the inner wall of the valve body 1 close to the liquid inlet 2, an elastic pressure plate 7 is provided on one side of the inner wall of the buffer chamber 4, a telescopic rod 8 is provided on one end of the elastic pressure plate 7, a valve plate 11 is provided on one end of the fixed section of the telescopic rod 8, a rubber sealing ring 12 is provided on one side of the valve plate 11, the rubber sealing ring 12 is in a funnel shape with a large diameter at one end and a small diameter at the other end, and the outer wall of the end with a large diameter of the rubber sealing ring 12 contacts with the inner wall of the valve body 1. The pressurized oil overcomes the elastic force of the elastic pressure plate 7, so that the valve plate 11 is separated from the valve seat 6, and the oil flows through the gap between the valve plate 11 and the valve seat 6 to the liquid outlet 3. During the oil outflow process, the oil will produce an impact force on the rubber sealing ring 12, causing the rubber sealing ring 12 to produce elastic deformation to retract toward the middle, driving the pressure rod 13 to squeeze the connecting rod 14 to move the end plate 9 away from the valve plate 11. When the pressure of the oil closing the liquid inlet 2 disappears, under the elastic force of the elastic pressure plate 7, the valve plate 11 is driven to press against the valve seat 6 to achieve the closure of the one-way valve. The planar design of the valve plate 11 and the valve seat 6 makes the contact area between the two large to avoid oil leakage.
[0020] One end of the fixed section of the telescopic rod 8 is fixedly connected to the center of the valve plate 11, and the other end is fixedly connected to the elastic pressure plate 7. One end of the movable section of the telescopic rod 8 is provided with an end plate 9, and a return spring 10 is provided between the end plate 9 and the elastic pressure plate 7. When the oil at one end of the liquid outlet 3 continues to maintain pressure, the oil with pressure will also generate pressure on the end plate 9 toward the side of the valve plate 11. At this time, the pressure on the end plate 9, the elastic force of the elastic pressure plate 7 and the pressure on the valve plate 11 itself will press the valve plate 11 tightly against the valve seat 6, ensuring reliable sealing between the valve seat 6 and the valve plate 11.
[0021] A pressure rod 13 is provided on the inner wall of the rubber sealing ring 12, and a connecting rod 14 is provided between the middle of the pressure rod 13 and the end plate 9. One end of the connecting rod 14 is hinged to the pressure rod 13, and the other end is hinged to the end plate 9. The connecting rod 14 generates pressure on the pressure rod 13, and the rubber sealing ring 12 is re-pressed on the inner wall of the valve body 1 through the pressure rod 13, and the outer side of the valve plate 11 is sealed for the second time, ensuring that the sealing effect of the valve plate 11 is good.
[0022] There are three pressure rods 13 , which are evenly arranged circumferentially on the inner wall of the rubber sealing ring 12 , with gaps left between the two ends of the three pressure rods 13 . The pressure rods 13 are used to evenly apply pressure to the rubber sealing ring 12 to improve the fit between the rubber sealing ring 12 and the inner wall of the valve body 1 .
[0023] The outer wall of the valve body 1 is provided with a cover plate 5 at the outer end of the buffer cavity 4 for sealing the buffer cavity 4 . Meanwhile, disassembling the cover plate 5 facilitates replacement and maintenance of the elastic pressure plate 7 .
[0024] When the cylinder check valve is in use, the hydraulic oil of the cylinder enters through the liquid inlet 2 of the check valve, and the pressurized oil overcomes the elastic force of the elastic pressure plate 7, so that the valve plate 11 is separated from the valve seat 6, and the oil flows out to the liquid outlet 3 through the gap between the valve plate 11 and the valve seat 6. During the oil outflow process, the oil will exert an impact force on the rubber sealing ring 12, causing the rubber sealing ring 12 to produce elastic deformation to retract toward the middle, driving the pressure rod 13 to squeeze the connecting rod 14 so that the end plate 9 moves away from the valve plate 11. When the oil inlet 2 closes the pressure of the inlet 2, the pressure of the inlet 2 is released. After it disappears, under the elastic force of the elastic pressure plate 7, the valve plate 11 is pressed against the valve seat 6 to realize the closing of the one-way valve. The plane design of the valve plate 11 and the valve seat 6 makes the contact area between the two large to avoid oil leakage. At the same time, the reset spring 10 will drive the end plate 9 to move to the side of the valve plate 11 under its own elastic force, so that the connecting rod 14 generates pressure on the pressure rod 13, and the rubber sealing ring 12 is re-pressed against the inner wall of the valve body 1 through the pressure rod 13, and the outer side of the valve plate 11 is sealed for the second time to ensure that the sealing effect of the valve plate 11 is good.
[0025] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.
Claims
1. A cylinder check valve, comprising: A valve body (1), a liquid inlet (2) and a liquid outlet (3), characterized in that: a buffer chamber (4) is provided on one side of the middle of the valve body (1), a valve seat (6) is provided on the inner wall of the valve body (1) close to the liquid inlet (2), an elastic pressure plate (7) is provided on one side of the inner wall of the buffer chamber (4), a telescopic rod (8) is provided at one end of the elastic pressure plate (7), a valve plate (11) is provided at one end of the fixed section of the telescopic rod (8), a rubber sealing ring (12) is provided on one side of the valve plate (11), the rubber sealing ring (12) is in the shape of a funnel with a larger diameter at one end and a smaller diameter at the other end, and the outer wall of the end with a larger diameter of the rubber sealing ring (12) contacts the inner wall of the valve body (1).
2. The oil cylinder check valve according to claim 1, characterized in that: One end of the fixed section of the telescopic rod (8) is fixedly connected to the center of the valve plate (11), and the other end is fixedly connected to the elastic pressure plate (7). One end of the movable section of the telescopic rod (8) is provided with an end plate (9), and a return spring (10) is provided between the end plate (9) and the elastic pressure plate (7).
3. The oil cylinder check valve according to claim 2, characterized in that: A pressure rod (13) is provided on the inner wall of the rubber sealing ring (12), and a connecting rod (14) is provided between the middle part of the pressure rod (13) and the end plate (9).
4. The oil cylinder check valve according to claim 3, characterized in that: One end of the connecting rod (14) is hinged to the pressure rod (13), and the other end is hinged to the end plate (9).
5. The oil cylinder check valve according to claim 3, characterized in that: There are three pressure rods (13), which are evenly arranged in the circumferential direction on the inner wall of the rubber sealing ring (12), and gaps are left between the two ends of the three pressure rods (13).
6. The oil cylinder check valve according to claim 1, characterized in that: The outer wall of the valve body (1) is provided with a cover plate (5) at the outer end of the buffer chamber (4).