Hydraulic control one-way valve

Abstract

The utility model discloses a hydraulic control one-way valve which comprises a valve body, a first screwed plug, a second screwed plug, a valve element and a piston ejector rod, the first screwed plug and the second screwed plug are installed at the two ends of the valve body respectively, the valve element and the piston ejector rod are movably installed in the valve body, a guide cylinder is arranged on one side of the second screwed plug, and the piston ejector rod is connected with the guide cylinder in a sliding mode. A guide groove is formed in one end of the piston ejector rod, the guide part is slidably connected with the guide groove, a first buffer pad is arranged at the end, close to the valve element, of the piston ejector rod, and a second buffer pad is arranged at one end of the guide part and located in the guide groove. The valve element and the piston ejector rod can be guided through the guide part and the guide groove, deviation of the valve element and the piston ejector rod in the moving process is prevented, the contact face between the valve element and the piston ejector rod is protected through the first buffer pad, abrasion is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a hydraulically controlled one-way valve. Background Art

[0002] A hydraulically controlled check valve is a type of directional control valve that allows reverse flow by controlling fluid pressure. The main difference between a hydraulically controlled check valve and a standard check valve is the addition of a control oil circuit. When the control oil circuit is disconnected from pressurized oil, the hydraulically controlled check valve operates like a standard check valve, with pressurized oil flowing only from the inlet to the outlet and preventing reverse flow. When pressure is applied to the control oil circuit, the piston push rod moves under the action of the pressurized oil, pushing open the valve core and connecting the inlet and outlet ports, allowing reverse flow.

[0003] The lack of a guide structure between the piston push rod and the valve core in the existing hydraulically controlled one-way valve makes it easy for the piston push rod to deviate from the movement of the valve core, which increases the wear of the contact surface between the two. This not only affects its service life, but also may cause adhesion when the wear is severe, affecting the normal use of the hydraulically controlled one-way valve. Utility Model Content

[0004] The purpose of the present utility model is to provide a hydraulically controlled one-way valve to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a hydraulically controlled one-way valve, comprising a valve body, a first screw plug and a second screw plug respectively installed at both ends of the valve body, and a valve core and a piston push rod movably installed inside the valve body, a guide cylinder being provided on one side of the second screw plug, the piston push rod being slidably connected to the guide cylinder, a guide portion being provided at one end of the valve core close to the piston push rod, a guide groove being provided at one end of the piston push rod, the guide portion being slidably connected to the guide groove, a first buffer pad being provided at one end of the piston push rod close to the valve core, a second buffer pad being provided at one end of the guide portion, and the second buffer pad being located inside the guide groove.

[0006] As a preferred solution of the present invention, a sealing ring is installed on the outer side of the piston push rod.

[0007] As a preferred solution of the present invention, a valve seat is provided on the inner wall of the valve body, and a sealing surface is formed between the valve seat and the valve core.

[0008] As a preferred solution of the present invention, a spring is installed between the valve core and the first wire plug, and a plurality of through holes equidistantly distributed in an annular shape are provided on the valve core.

[0009] As a preferred solution of the present invention, the valve body is provided with an oil outlet, an oil inlet and a control oil inlet in sequence from left to right.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention can guide the valve core and the piston top rod through the provided guide part and guide groove to prevent deviation between the two during movement, and the contact surface between the valve core and the piston top rod is protected by the provided first buffer pad, and the contact surface between the guide part and the piston top rod is protected by the second buffer pad, thereby reducing wear and extending service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0012] Figure 2 It is a cross-sectional view of the utility model.

[0013] In the figure: 1. Valve body; 2. First wire plug; 3. Second wire plug; 4. Oil outlet; 5. Oil inlet; 6. Control oil inlet; 7. Spring; 8. Valve core; 9. Through hole; 10. First buffer pad; 11. Sealing ring; 12. Guide cylinder; 13. Piston push rod; 14. Second buffer pad; 15. Guide part; 16. Valve seat; 17. Guide groove. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0015] See also Figures 1 to 2The utility model provides a technical solution: a hydraulically controlled one-way valve, comprising a valve body 1, a first screw plug 2 and a second screw plug 3 respectively installed at both ends of the valve body 1, and a valve core 8 and a piston push rod 13 movably installed inside the valve body 1. A guide cylinder 12 is provided on one side of the second screw plug 3. The guide cylinder 12 is used to guide the piston push rod 13, so that the piston push rod 13 is more stable during movement. The piston push rod 13 is slidably connected to the guide cylinder 12. A guide portion 15 is provided at one end of the valve core 8 close to the piston push rod 13, and a guide groove 17 is provided at one end of the piston push rod 13. The guide portion 15 and the guide groove 17 are used to guide the valve core 8 and the piston push rod 13 to prevent the two from deviating during movement, and the valve core 8 is cushioned by the first buffer pad 10 provided. The contact surface between the guide part 15 and the piston top rod 13 is protected, and the second buffer pad 14 protects the contact surface between the guide part 15 and the piston top rod 13, which reduces wear and extends the service life. At the same time, when the piston top rod 13 contacts the valve core 8, the first buffer pad 10 and the second buffer pad 14 can also play a certain buffering role to prevent the piston top rod 13 from damaging the valve core 8. The guide part 15 is slidingly connected to the guide groove 17. The first buffer pad 10 is provided at one end of the piston top rod 13 close to the valve core 8, and the second buffer pad 14 is provided at one end of the guide part 15. The material of the first buffer pad 10 and the second buffer pad 14 are both rubber. Rubber is corrosion-resistant, has a long service life, and is highly elastic, can play a good protective effect, and the second buffer pad 14 is located inside the guide groove 17.

[0016] A sealing ring 11 is installed on the outer side of the piston push rod 13 , and the sealing ring 11 is used to improve the sealing between the piston push rod 13 and the valve body 1 to prevent the control oil flowing in from the control oil inlet 6 from flowing into the oil inlet 5 .

[0017] A valve seat 16 is provided on the inner wall of the valve body 1 , and a seal is formed between the valve seat 16 and the valve core 8 to ensure that no leakage occurs. A sealing surface is formed between the valve seat 16 and the valve core 8 .

[0018] Among them, a spring 7 is installed between the valve core 8 and the first wire plug 2. The spring 7 is used to apply thrust to the valve core 8 so that the valve core 8 can be tightly attached to the valve seat 16 to close the valve. A plurality of through holes 9 are distributed in an annular shape and at equal distances are provided on the valve core 8.

[0019] The valve body 1 is provided with an oil outlet 4, an oil inlet 5 and a control oil inlet 6 from left to right.

[0020] Specifically, when control oil is not injected into the control oil inlet 6, it still functions as a one-way valve, and oil can only flow from the oil inlet 5 to the oil outlet 4. When oil enters the oil inlet 5, the oil will push the valve core 8 to move, the valve core 8 is separated from the valve seat 16 and the spring 7 is compressed, and the oil flows from the oil inlet 5 to the oil outlet 4. When oil enters the oil outlet 4, the pressure of the oil and the elastic force of the spring 7 act together on the valve core 8, the valve core 8 is pressed against the valve seat 16, and the oil cannot flow through between the valve core 8 and the valve seat 16. Therefore, the oil cannot flow from the oil outlet 4 to the oil inlet 5, thereby realizing the function of the one-way valve. When control oil is injected into the control oil inlet 6, the control oil will push the piston push rod 13 to move, and the piston push rod 13 pushes the valve core 8 to move, and the valve core 8 is separated from the valve seat 16. At this time, the oil can flow freely between the oil outlet 4 and the oil inlet 5.

[0021] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one such feature.

[0023] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0024] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulically controlled one-way valve, comprising a valve body (1), a first screw plug (2) and a second screw plug (3) respectively mounted at both ends of the valve body (1), and a valve core (8) and a piston push rod (13) movably mounted inside the valve body (1), characterized in that: A guide cylinder (12) is provided on one side of the second wire plug (3), the piston top rod (13) is slidably connected to the guide cylinder (12), a guide portion (15) is provided on one end of the valve core (8) close to the piston top rod (13), a guide groove (17) is provided on one end of the piston top rod (13), the guide portion (15) is slidably connected to the guide groove (17), a first buffer pad (10) is provided on one end of the piston top rod (13) close to the valve core (8), a second buffer pad (14) is provided on one end of the guide portion (15), and the second buffer pad (14) is located inside the guide groove (17).

2. A hydraulically controlled one-way valve according to claim 1, characterized in that: A sealing ring (11) is installed on the outer side of the piston push rod (13).

3. The hydraulically controlled one-way valve according to claim 1, characterized in that: The inner wall of the valve body (1) is provided with a valve seat (16), and a sealing surface is formed between the valve seat (16) and the valve core (8).

4. The hydraulically controlled one-way valve according to claim 1, characterized in that: A spring (7) is installed between the valve core (8) and the first wire plug (2), and a plurality of through holes (9) equidistantly distributed in an annular shape are provided on the valve core (8).

5. The hydraulically controlled one-way valve according to claim 1, characterized in that: The valve body (1) is provided with an oil outlet (4), an oil inlet (5) and a control oil inlet (6) in sequence from left to right.

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