One-way constant flow valve

Abstract

The present application relates to hydraulic jar matching component technical field, provide a kind of one-way constant flow valve, including pipeline;The valve body is assembled with interference in the pipeline, and two-way through hole is opened on the valve body along the axial direction and is respectively first through hole and second through hole, wherein the first through hole is equipped with the push rod that can be displaced along the axial direction, and the push rod has cone structure and contacts the rear end of valve needle, and the valve needle is transversely installed at the position between two-way through hole, and the front end of valve needle is transversely explored into second through hole.This application has simple structure, and constant flow function is less influenced by temperature, and water flow is directly passed, and water flow is not worried about impact on internal structure, i.e. less influenced by pressure, so that the working delay of hydraulic jar is more stable, and reset is more smooth.

Description

Technical Field

[0001] This invention relates to a one-way constant flow valve, belonging to the technical field of hydraulic shock absorber components. Background Technology

[0002] Currently, most valves used in hydraulic shock absorbers have throttling functions, but some valves lack constant flow control. After repeated operation, the oil temperature inside the shock absorber rises sharply due to repeated compression, leading to increased pressure within the oil chamber and consequently reducing the shock absorber's operating delay. Some valves do have constant flow control, but this is achieved by utilizing the different expansion coefficients of different materials at different temperatures. Once the temperature reaches a certain level, the constant flow function is still significantly affected by pressure. Furthermore, the aforementioned throttling valves are all bidirectional, which can impact the shock absorber's reset process.

[0003] On the other hand, existing one-way constant flow valves also include single-channel types, but this single-channel solution is difficult to effectively deal with situations where one end of the valve is under ultra-high pressure and the other end is under low pressure. When the water flows through, it will cause excessive impact on the internal structure, leading to the failure of the internal structure. Therefore, the one-way constant flow valves in the existing technology cannot be directly used in hydraulic shockers. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a one-way constant flow valve. The one-way constant flow valve has a simple structure, the constant flow function is less affected by temperature, and the water flow is direct without worrying about the water flow impacting the internal structure.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides a one-way constant flow valve, including a pipe, a valve body is interference-fitted inside the pipe, and two through holes are opened along the axial direction on the valve body, namely a first through hole and a second through hole. A push rod that can be displaced along the axial direction is installed in the first through hole. The push rod has a conical structure that contacts the rear end of the valve needle. The valve needle is installed laterally between the two through holes, and the front end of the valve needle extends laterally into the second through hole.

[0007] The valve body is equipped with a valve needle seat, which is coaxial with the second through hole of the valve body. The valve needle seat has a through hole that communicates with the second through hole of the valve body.

[0008] The valve needle is inserted into the second through hole through the valve needle seat, and the rear end of the valve needle has a spherical arc-shaped protrusion structure.

[0009] A valve needle spring is fitted on the valve needle for resetting. One end of the valve needle spring abuts against the valve needle seat, and the other end abuts against the valve needle.

[0010] The first through hole has a cavity at the location of the cone on the push rod, and the diameter of the cone structure on the push rod is larger than the diameter of the first through hole.

[0011] The valve body is composed of two sections along the axial direction, with the valve needle seat located between the two sections.

[0012] The push rod is fitted with a push rod spring for resetting, and the upper and lower sections of the push rod are fitted with holes in the valve body and are equipped with seals.

[0013] The push rod spring is installed at a position on the push rod where the diameter of the small end of the cone structure is smaller than the diameter of the small end of the cone structure in the extension direction, and the other end of the push rod spring abuts against the step on the inner wall of the valve body.

[0014] The valve body is composed of upper and lower halves, and sealing elements are installed on the mating surfaces of the upper and lower halves; the outer circle of the valve body is interference-fitted with the pipeline to form a sealing surface.

[0015] A sealing element is provided between the valve body and the valve needle seat mating surface, which is an end face seal; a sealing element is provided between the valve needle and the valve needle seat mating surface.

[0016] The beneficial effects of this invention are: simple structure, constant flow function is less affected by temperature, and direct water flow does not require concern about water flow impacting the internal structure, i.e., less affected by pressure, thus making the working delay of the hydraulic shocker more stable. When the fluid flows in reverse, the valve does not have constant flow function and there is no throttling, so the reset is smoother. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of at least one embodiment of the present invention.

[0018] In the diagram: 1-pipeline, 2-valve body, 3-valve needle seat, 4-valve needle, 5-valve needle spring, 6-push rod, 7-push rod spring. Detailed Implementation

[0019] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0020] The first embodiment of the present invention relates to, for example Figure 1 The one-way constant flow valve shown includes a pipe 1; a valve body 2 is interference-fitted inside the pipe 1, and two through holes are opened along the axial direction on the valve body 2, namely a first through hole and a second through hole. A push rod 6 that can be displaced along the axial direction is installed in the first through hole. The push rod 6 has a conical structure that contacts the rear end of a valve needle 4. The valve needle 4 is installed laterally between the two through holes, and the front end of the valve needle 4 extends laterally into the second through hole.

[0021] The second embodiment of the present invention is largely the same as the first embodiment, except that the valve body 2 is equipped with a valve needle seat 3, the valve needle seat 3 is coaxial with the second through hole of the valve body 2, and the valve needle seat 3 is provided with a through hole that communicates with the second through hole of the valve body 2.

[0022] Furthermore, the valve needle 4 is inserted into the second through hole through the valve needle seat 3, and the rear end of the valve needle 4 is a spherical arc-shaped protrusion structure.

[0023] Furthermore, a valve needle spring 5 is fitted on the valve needle 4 for resetting. One end of the valve needle spring 5 abuts against the valve needle seat 3, and the other end abuts against the valve needle 4.

[0024] Furthermore, the valve body 2 is composed of two sections along the axial direction, with the valve needle seat 3 located between the two sections.

[0025] The third embodiment of the present invention is largely the same as the first embodiment, mainly in the preferred embodiment of the push rod 6, in which there is a cavity in the first through hole at the position of the cone on the push rod 6, and the diameter of the cone structure on the push rod 6 is larger than the diameter of the first through hole.

[0026] Furthermore, a push rod spring 7 for resetting is fitted on the push rod 6, and the upper and lower sections of the push rod 6 are fitted with holes in the valve body 2 and are equipped with seals.

[0027] Preferably, the push rod spring 7 is mounted on the push rod 6 at a position where its diameter is smaller than the diameter of the small end of the cone structure in the extension direction, and the other end of the push rod spring 7 abuts against the step on the inner wall of the valve body 2.

[0028] Furthermore, the valve body 2 is composed of upper and lower halves, and sealing elements are installed on the mating surfaces of the upper and lower halves; the outer circle of the valve body 2 is interference-fitted with the pipe 1 to form a sealing surface.

[0029] Furthermore, a sealing element is provided between the valve body 2 and the valve needle seat mating surface, which is an end face seal; a sealing element is provided between the valve needle 4 and the valve needle seat 3 mating surface.

[0030] In summary, according to a typical embodiment of the present invention, the valve body 2 is composed of upper and lower halves, with sealing elements installed on the mating surfaces of the upper and lower halves. The valve body can only be closed after the internal components are assembled. The outer circle of the valve body is interference-fitted with the pipeline to form a sealing surface. A valve needle seat 3 is installed inside the valve body 2, and a sealing element is installed between the valve needle seat 3 and the mating surface of the valve body 2. The white area between the valve body 2 and the valve needle seat 3 is a fluid flow channel and a second through hole. The valve needle seat 3 has an opening at the right end, and a valve needle 4 and a sealing element are installed in the hole. The valve needle 4 can move left and right in the hole. A valve needle spring 5 is installed on the valve needle 4, so that the valve needle 4 is subjected to a force to the right. The right end of the valve needle 4 contacts the push rod 6. The upper and lower sections of the push rod 6 are mated with the second through hole of the valve body 2 and are equipped with sealing elements. A push rod spring 7 is installed at the lower end of the push rod 6. When the push rod 6 moves downward, the push rod spring 7 causes the push rod 6 to be subjected to an upward force, while the valve needle 4 is subjected to a force to the left.

[0031] Therefore, when the fluid pressure at the upper end of valve body 2 reaches a certain level, while the lower end remains at a low pressure, fluid will flow downwards from the flow channels of valve body 2 and valve needle seat 3. Simultaneously, push rod 6 will also experience downward pressure. When this pressure exceeds the elastic force of push rod spring 7 and the reaction force of valve needle 4, push rod 6 will move downwards. At this time, valve needle 4 will move to the left, entering the flow channel of valve needle seat 3, thus reducing the minimum cross-sectional area of ​​the flow channel. Furthermore, when the fluid pressure at the lower end of valve body 2 remains constant, the higher the pressure at the upper end of valve body 2, the smaller the minimum cross-sectional area of ​​the flow channel of valve needle seat 3, thus achieving a constant flow rate. When the upper end of valve body 2 is at a low pressure and the lower end is at a high pressure, push rod 6 will not move, valve needle 4 will not move, and the minimum cross-sectional area of ​​the flow channel will not be affected. Therefore, when the fluid flows in reverse, the secondary valve does not have a constant flow rate function.

Claims

1. A one-way constant flow valve, comprising a pipeline (1), characterized in that: The pipe (1) is fitted with a valve body (2) with an interference fit. The valve body (2) has two through holes along the axial direction, namely the first through hole and the second through hole. The first through hole is fitted with a push rod (6) that can be displaced along the axial direction. The push rod (6) has a conical structure that contacts the rear end of the valve needle (4). The valve needle (4) is installed laterally between the two through holes. The front end of the valve needle (4) extends laterally into the second through hole. The push rod (6) is fitted with a push rod spring (7) for resetting. The upper and lower sections of the push rod (6) are fitted with holes in the valve body (2) and are equipped with seals. The push rod spring (7) is installed on the push rod (6) at a position where the diameter of the small end of the cone structure is smaller than the diameter of the small end of the cone structure in the extension direction. The other end of the push rod spring (7) abuts against the step on the inner wall of the valve body (2). The valve body (2) is composed of upper and lower halves, and sealing elements are installed on the mating surfaces of the upper and lower halves; the outer circle of the valve body (2) and the pipe (1) are interference fit to form a sealing surface; The valve body (2) is equipped with a valve needle seat (3), which is coaxial with the second through hole of the valve body (2). The valve needle seat (3) has a through hole that communicates with the second through hole of the valve body (2). The valve needle (4) is inserted into the second through hole through the valve needle seat (3), and the rear end of the valve needle (4) is a spherical arc protrusion structure; A valve needle spring (5) is fitted on the valve needle (4) for resetting. One end of the valve needle spring (5) abuts against the valve needle seat (3) and the other end abuts against the valve needle (4). There is a cavity in the first through hole at the position of the cone on the push rod (6), and the diameter of the cone structure on the push rod (6) is larger than the diameter of the first through hole; The valve body (2) is divided into two sections along the axial direction, and the valve needle seat (3) is located between the two sections.

2. The one-way constant flow valve as described in claim 1, characterized in that: The valve body (2) is equipped with a sealing element between the mating surface of the valve needle seat and the valve needle seat, which is an end face seal; the valve needle (4) is equipped with a sealing element between the mating surface of the valve needle seat (3).

Images