Self-closed switch valve

Abstract

The invention provides a self-closed switch valve, and relates to the technical field of self-closed switch valves. Comprising a valve body, a valve element and a valve pipe arranged in the valve body, and the valve body comprises a valve body upper section and a valve body lower section; the valve core is mounted in the lower section of the valve body; a guide hole is formed in the upper section of the valve body. The valve pipe is arranged in the guide hole in a sliding fit mode. A first conical surface is arranged at the lower end of the upper section of the valve body; a second conical surface matched with the first conical surface is arranged at the upper end of the valve core; a reset spring located below the valve element is arranged in the lower section of the valve body. The lower end of the valve pipe abuts against the upper end face of the valve element. The valve pipe is installed on the oil pipe base which is further connected with the oil pipe, and the valve pipe is communicated with the oil pipe. And the oil pipe seat is detachably connected with the valve body. By the adoption of the valve, the valve can be automatically opened and closed without manual intervention, the defects that manual opening and closing need tools and occupy operation space are overcome, the valve is particularly suitable for narrow and small environments such as an automobile chassis, an oil way can be automatically closed when an oil way pipeline is disassembled, and hydraulic oil leakage is prevented.

Description

Technical Field

[0001] The present invention belongs to the technical field of self-sealing switch valves, and in particular relates to a self-sealing switch valve. Background Art

[0002] A switch valve refers to a valve-style switch, such as a faucet, a pressure cooker valve, etc. It is a switch that acts as a cutoff. The switch valve is divided into pneumatic switch valves and electric switch valves. The switch valve is a switch used to achieve a cutoff effect on the fluid.

[0003] Existing pipe joints typically require pre-installed on-off valves in the flow channel (pipeline) to cut off the medium before the connection can be installed, which often takes up a lot of space. Especially with the application of hydraulic suspension in the automotive chassis, the space requirements on the vehicle chassis are extremely strict. The demand for highly integrated and miniaturized design makes existing on-off valves unable to meet the requirements.

[0004] The invention patent, CN105570469A, published in Chinese patent literature, discloses a "fluid switching valve," specifically comprising a handle, elbow, valve tube, sealing port, sealing ring, valve seat, base, bracket, conical retaining cap, valve outer tube, and bidirectional sealing ring. The valve tube can rotate horizontally and move vertically within the outer tube. The valve tube serves as both a flow channel and a component of the valve. The sealing port of the valve tube and the sealing ring on the valve seat control the on / off switching of the fluid. Pressing the handle releases the sealing ring into the sealing port, shutting off the fluid flow. Pulling the handle releases the sealing ring from the sealing port, allowing the fluid to flow out through the valve tube and elbow.

[0005] However, the aforementioned prior art discloses that when it is necessary to open or close the switch valve, the valve needs to be opened and closed by manually adjusting the handle. This operation is cumbersome and requires additional operating space. It is difficult to install in a small space such as a car chassis and cannot meet the integration requirements of compact scenes such as car chassis. Since this application is mainly suitable for use in the vehicle undercarriage environment, in actual use, the adjustment handle is limited by the structure and is inconvenient to install. Moreover, when the oil pipeline needs to be disassembled and repaired, in order to prevent the hydraulic oil in the valve from leaking, it is necessary to design a valve that can automatically prevent hydraulic oil leakage. Summary of the Invention

[0006] The present invention provides a self-sealing on-off valve, which can realize automatic opening and closing of the valve without human intervention, eliminating the disadvantages of manual opening and closing that require tools and occupy operating space. It is particularly suitable for narrow environments such as automobile chassis. At the same time, it can automatically close the oil circuit when the oil pipeline is disassembled to prevent hydraulic oil leakage.

[0007] The present invention is achieved through the following technical solutions: a self-sealing on-off valve, comprising a valve body, a valve core and a valve tube arranged in the valve body, the valve body comprising an upper valve body section and a lower valve body section; the valve core is installed in the lower valve body section;

[0008] The upper section of the valve body is provided with a guide hole, and the valve pipe is slidably arranged in the guide hole; the lower end of the upper section of the valve body is provided with a first conical surface, and the upper end of the valve core is provided with a second conical surface that cooperates with the first conical surface;

[0009] A return spring is provided in the lower section of the valve body and is located below the valve core;

[0010] The lower end of the valve tube abuts against the upper end surface of the valve core; the valve tube is installed on the oil pipe seat, the oil pipe seat is also connected to the oil pipe, and the valve tube is communicated with the oil pipe; the oil pipe seat is detachably connected to the valve body.

[0011] Furthermore, in order to better implement the present invention, the inner cavity of the lower section of the valve body is provided with a sliding surface that slides with the peripheral wall of the valve core.

[0012] Furthermore, in order to better implement the present invention, a plurality of sliding bosses are evenly distributed on the circumference of the lower section of the valve body, and the inner wall of the sliding boss is a sliding surface; a valve core side channel is formed between two adjacent sliding surfaces.

[0013] Furthermore, in order to better implement the present invention, a stop surface is provided below the sliding surface.

[0014] Furthermore, in order to better implement the present invention, a contact protrusion is provided on the upper end surface of the valve core, the contact protrusion abuts against the valve tube, and an end surface through groove is provided on the upper surface of the contact protrusion.

[0015] Furthermore, in order to better implement the present invention, a conical surface sealing ring is provided on the second conical surface of the valve core matched with the above-mentioned conical inclined surface.

[0016] Furthermore, in order to better implement the present invention, at least one radial sealing ring is provided on the outer peripheral surface of the valve tube.

[0017] Furthermore, in order to better implement the present invention, the radial sealing ring includes an O-ring and a skeleton sealing ring.

[0018] Furthermore, in order to better implement the present invention, an end face sealing ring is provided between the oil pipe seat and the valve body.

[0019] The beneficial effects that can be achieved by this application.

[0020] This invention designs a small, self-sealing on-off valve, primarily used to seal hydraulic suspension shock absorbers. The valve closes under the combined action of the shock absorber's internal hydraulic pressure and the return spring, sealing the oil within the shock absorber and preventing leakage during transportation. Once the shock absorber is loaded onto the vehicle, the oil pipe is inserted, pushing open the valve core. The valve remains open, maintaining fluid flow and enabling the entire hydraulic suspension system to operate normally. If maintenance is required, the pipe connector is removed and the valve core returns to its original position, automatically sealing the oil circuit and preventing oil leakage.

[0021] The switch valve of the present invention is highly integrated and miniaturized, which saves more installation space and is more practical for automobile chassis or other compact locations. The valve automatically resets when the tube is removed, eliminating the need for tools and operating space for manual switching, and significantly improving operational convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic cross-sectional view of the closed structure of a fast self-closing on-off valve provided in an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of the opening structure of the fast self-closing switch valve provided by an embodiment of the present invention after being inserted into the oil pipe.

[0025] Figure 3 yes Figure 2 AA cross-section diagram.

[0026] Icons: 1. Valve body; 101. Upper section of valve body; 102. Lower section of valve body; 2. Valve core; 3. Valve tube; 4. Guide hole; 5. Return spring; 6. Oil pipe seat; 7. Oil pipe; 8. Sliding surface; 81. Sliding boss; 9. First conical surface; 10. Second conical surface; 11. Valve core side channel; 12. Stop surface; 13. Contact bump; 131. End face groove; 14. Conical sealing ring; 15. Radial sealing ring; 151. O-ring; 152. Skeleton sealing ring; 16. End face sealing ring; 17. Oil inlet.

[0027] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other implementations obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0029] As attached Figure 1 and Figure 2 The self-sealing on-off valve shown in the figure comprises a valve body 1 and a valve core 2 installed inside the valve body 1. The valve body 1 comprises an upper valve body section 101 and a lower valve body section 102. The valve core 2 is installed in the lower valve body section 102;

[0030] The upper section 101 of the valve body is provided with a guide hole 4, and the valve tube 3 arranged in the valve body 1 is slidably fitted in the guide hole 4;

[0031] The lower end of the inner cavity of the upper section 101 of the valve body is provided with a first conical surface 9, and the upper end of the valve core 2 is provided with a second conical surface 10 that cooperates with the first conical surface 9. The first conical surface 9 and the second conical surface 10 cooperate to form a seal.

[0032] A return spring 5 is provided in the lower section 102 of the valve body and is located below the valve core 2 . The return spring 5 drives the valve core 2 to move up and down. The lower section 102 of the valve body is connected to the oil inlet pipe through the oil inlet port 17 .

[0033] The lower end of the valve tube 3 abuts against the upper end surface of the valve core 2. The valve tube 3 is installed on the oil pipe seat 6, which is also connected to the oil pipe 7. The valve tube 3 is connected to the oil pipe 7; the oil pipe seat 6 is detachably connected to the valve body 1.

[0034] like Figure 1 As shown, the lower section 102 of the valve body 1 is connected to the oil inlet pipe 7. Under the action of the return spring 5, the first conical surface 9 of the valve core 2 abuts against the second conical surface 10 of the upper section 101 of the valve body to form a sealing pair and close the oil circuit.

[0035] like Figure 2 As shown, when the valve tube 3 is inserted into the guide hole 4, the valve tube 3 pushes the valve core 2 downward, separating the first tapered surface 9 from the second tapered surface 10. The oil circuit in the valve body 1 communicates with the oil circuits of the valve tube 3 and the oil pipe 7. When the oil pipe 7 needs to be repaired, disassembled, or replaced, the oil pipe seat 6 is removed, and the valve tube 3 is withdrawn from the guide hole 4. The valve core 2 is then urged upward by the return spring 5, abutting against the second tapered surface 10 of the upper section 101 of the valve body, forming a seal and preventing leakage.

[0036] In order to ensure positioning and stability of the valve core 2 during its up and down movement, a sliding surface 8 is provided in the inner cavity of the lower section 102 of the valve body, which is in sliding cooperation with the peripheral wall of the valve core 2 .

[0037] On this basis, a stop surface 12 is further provided at the lower part of the sliding boss 81. When the valve core 2 is driven by the valve tube 3 to move downward, the lower part of the valve core 2 abuts against the stop surface 12 and is positioned. Therefore, after the oil circuit is connected, the valve core 2 is restricted by the valve tube 3 and the stop surface 12 above and below, respectively, reducing or preventing the vibration of the valve core 2 during operation and reducing noise.

[0038] like Figure 1 and Figure 2 As shown, in order to facilitate the flow of oil between the filter element and the valve tube 3, a contact protrusion 13 is provided on the upper end surface of the valve core 2. The contact protrusion 13 abuts against the valve tube 3, and an end surface through groove 131 is provided on the upper surface of the contact protrusion 13.

[0039] like Figure 3 As shown, in order to ensure the oil circuit of the valve core 2 is connected, a plurality of sliding bosses 81 are evenly distributed on the circumference of the valve body lower section 102. The inner wall of the sliding boss 81 is a sliding surface 8; a valve core side channel 11 is formed between two adjacent sliding surfaces 8.

[0040] At the same time, if Figure 2 As shown, the valve core side channel 11 and the end surface through groove 131 can be used in combination. When the oil pipe seat 6 is connected to the valve, the oil enters the valve from the oil inlet 17, passes through the valve core 2 from the valve core side channel 11, enters between the first conical surface 9 and the second conical surface 10, and then enters the valve pipe 3 through the end surface through groove 131, thereby connecting with the oil pipe 7.

[0041] like Figure 1 and Figure 2 As shown, in order to enhance the sealing effect between the first conical surface 9 and the second conical surface 10 , a conical surface sealing ring 14 is provided on the second conical surface 10 .

[0042] like Figure 1 and Figure 2 As shown, in order to enhance the sealing effect between the oil seat and the valve body 1, at least one radial sealing ring 15 is provided on the outer circumferential surface of the valve tube 3. After the valve tube 3 is inserted into the valve body 1, the radial sealing ring 15 is located between the outer wall of the valve tube 3 and the inner wall of the guide hole 4, thereby enhancing the sealing effect between the valve tube 3 and the guide hole 4.

[0043] Specifically, the radial sealing ring 15 of this embodiment includes an O-ring 151 and a skeleton sealing ring 152 .

[0044] Furthermore, in this embodiment, an end face sealing ring 16 is provided between the oil pipe seat 6 and the valve body 1 to further enhance the sealing effect between the oil seat and the valve body 1 .

[0045] Optionally, the valve body 1 of this embodiment is provided with a plurality of mounting holes at intervals near one end of the oil pipe seat 6, and the oil pipe seat 6 is provided with through holes used in conjunction with the mounting holes for installing bolts to achieve a detachable connection between the valve body 1 and the oil pipe seat 6.

[0046] In summary, the specific implementation of this embodiment is as follows:

[0047] After the valve body 1 is installed on the vehicle body, the liquid inlet of the valve body 1 is connected to the hydraulic suspension system, and the guide hole 4 is set at the liquid outlet for connecting the oil pipe 7. In the normal connection state, the guide column of the oil pipe seat 6 is inserted into the guide hole 4, and the valve core 2 is pushed to move by the positioning block, so that the first cone surface 9 and the second cone surface 10 are separated, and the reset spring 5 is compressed at the same time, so that the valve core side channel 11 is connected, and the oil can enter the guide hole 4 from the valve core 2 cavity through the valve core side channel 11, and specifically enter the oil pipe 7 channel of the guide column through the end face groove 131, so that the oil can enter the oil pipe 7.

[0048] After the oil pipe 7 is taken out, the return spring 5 returns to drive the valve core 2 to move, so that the first cone surface 9 and the second cone surface 10 abut against each other, sealing the valve core 2 cavity, closing the valve, and sealing the oil in the shock absorber to prevent leakage during transportation.

[0049] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A self-sealing on-off valve, comprising a valve body (1), a valve core (2) and a valve tube (3) arranged in the valve body, characterized in that: The valve body (1) comprises a valve body upper section (101) and a valve body lower section (102); the valve core (2) is installed in the valve body lower section (102); The upper section (101) of the valve body is provided with a guide hole (4), and the valve tube (3) is slidably arranged in the guide hole (4); the lower end (1) of the upper section (101) of the valve body is provided with a first conical surface (9), and the upper end of the valve core (2) is provided with a second conical surface (10) that cooperates with the first conical surface (9); The lower section (102) of the valve body is provided with a return spring (5) located below the valve core (2); The lower end of the valve tube (3) abuts against the upper end surface of the valve core (2); the valve tube (3) is installed on the oil pipe seat (6), and the oil pipe seat (6) is also connected to the oil pipe (7), and the valve tube (3) is communicated with the oil pipe (7); the oil pipe seat (6) is detachably connected to the valve body (1).

2. A self-sealing on-off valve according to claim 1, characterized in that: The inner cavity of the lower section (102) of the valve body is provided with a sliding surface (8) that is in sliding engagement with the peripheral wall of the valve core (2).

3. A self-sealing on-off valve according to claim 2, characterized in that: A plurality of sliding bosses (81) are evenly distributed on the circumference of the valve body lower section (102), and the inner wall of the sliding boss (81) is a sliding surface (8); a valve core side channel (11) is formed between two adjacent sliding surfaces (8).

4. A self-sealing on-off valve according to claim 3, characterized in that: A stop surface (12) is provided at the lower portion of the sliding boss (81).

5. The self-sealing on-off valve according to claim 1, characterized in that: The upper end surface of the valve core (2) is provided with a contact protrusion (13), the contact protrusion (13) abuts against the valve tube (3), and the upper surface of the contact protrusion (13) is provided with an end surface through groove (131).

6. The self-sealing on-off valve according to claim 1, characterized in that: A cone surface sealing ring (14) is provided on the second cone surface (10).

7. The self-sealing on-off valve according to claim 1, characterized in that: The valve tube (3) is provided with at least one radial sealing ring (15) on its outer peripheral surface.

8. The self-sealing on-off valve according to claim 7, characterized in that: The radial sealing ring (15) comprises an O-type sealing ring (151) and a skeleton sealing ring (152).

9. The self-sealing on-off valve according to claim 7, characterized in that: An end face sealing ring (16) is provided between the oil pipe seat (6) and the valve body (1).

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