Shuttle valve structure
By setting a symmetrical radial outlet and sealing ring on the valve core of the shuttle valve, the problem of the two inlets connecting the existing shuttle valve during the movement of the valve core is solved, ensuring the correct distribution of oil and improving the braking function and safety of the rail train.
Patent Information
- Application Number
- CN202420692557.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-07
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-04-07
AI Technical Summary
During the movement of the valve core, there is a stage where the two inlets are in communication, causing the oil to be pumped into the inlet with lower oil pressure, affecting the braking function of the rail train, and even threatening the safety of passengers.
A shuttle valve structure is designed, by symmetrically setting the radial outlet on the valve core and installing sealing rings on both sides of the valve core, so that the two radial outlets are always not connected during the movement of the valve core, thereby avoiding oil pumping into the wrong inlet.
It effectively avoids the communication state between the two inlets during the valve core movement, prevents oil from pumping into the wrong inlet, ensures the normal operation of the braking function of the rail train, and improves safety.
Smart Images
Figure CN222668995U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a pipeline valve device, more specifically, it relates to a shuttle valve structure. Background Art
[0002] The shuttle valve is a valve body with two inlets and one outlet. The valve core is moved by the oil pressure difference between the two inlets so that the inlet with greater oil pressure forms a passage with the outlet and is disconnected from the other one.
[0003] The disadvantage of the existing shuttle valve is that during the movement of the valve core, there is at least one stage where the two inlets are connected, and the inlet with higher oil pressure will pump part of the oil into the inlet with lower oil pressure. Corresponding to rail trains, the oil in the common relief tank will enter the auxiliary relief tank. After many times, the oil in the common relief tank will be insufficient, thus affecting the brake relief. In severe cases, the train will stop operating, threatening the safety of passengers.
[0004] Based on the above-mentioned deficiencies, the present application aims to provide a shuttle valve structure to eliminate the above-mentioned stage that causes the two inlets to be connected, so that during the movement of the valve core, the two inlets are not connected from beginning to end. Summary of the invention
[0005] The utility model overcomes the deficiency of the existing shuttle valve that the two inlets are in a connected state during the switching process, making it impossible to apply the relief function of rail trains, and provides a shuttle valve structure which can eliminate the stage causing the two inlets to be connected, so that during the movement of the valve core, the two inlets are not connected from beginning to end.
[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0007] A shuttle valve structure includes a valve body, a valve core and a plug. The valve body has a valve hole and a first oil inlet hole, a second oil inlet hole and an oil outlet hole which are connected to the valve hole in a radial direction. The plug is fixedly connected to at least one end of the valve hole. The valve core is slidably connected in the valve hole. The valve core is symmetrically provided with radial outlets and a sealing ring sleeved on the side wall of the valve core. The sealing ring is sleeved on both sides of the radial outlet so that the two radial outlets of the valve core are in a disconnected state during the movement of the valve core.
[0008] The valve hole is provided on the valve body and is a through hole. The plug closes the valve hole in the axial direction. The outer diameter of the valve core is adapted to the aperture of the valve hole so that the valve core can slide in the valve hole. When the first oil inlet hole and the second oil inlet hole are connected to an external oil circuit, such as a common relief oil tank and an auxiliary relief oil tank, the valve core will be subjected to the oil pressure from the first oil inlet hole and the second oil inlet hole in the axial direction and in opposite directions. Since the valve core is a symmetrical structure, the side with greater oil pressure will generate greater force, pushing the valve core to move to the other side. The radial outlet on the valve core is connected to the oil outlet hole to form a corresponding passage. By arranging sealing rings on both sides of the radial outlet, the sealing ability of the radial outlet is enhanced, so that the oil entering the oil outlet hole cannot enter the other radial outlet hole through the gap between the valve core and the valve hole. In addition, the sealing rings arranged on both sides of the radial outlet always block the connection between the two radial outlets.
[0009] Preferably, the sealing ring includes a first sealing ring and a second sealing ring, the first sealing ring is located outside the two radial outlets, the second sealing ring is located inside the radial outlets, and the diameter of the oil outlet and the valve hole at the joint is smaller than the width of the two second sealing rings. The structure allows the second sealing ring corresponding to a radial outlet to slide out of the oil outlet during the sliding process of the valve core, while the other second sealing ring is still at the joint position of the valve hole and the oil outlet, which can further prevent the two inlets from being connected.
[0010] Preferably, the width of the second sealing ring is larger than that of the first sealing ring. The structure enables the second sealing ring to have better sealing performance and can further prevent the two inlets from being connected.
[0011] Preferably, a gasket is also included. Two gaskets are installed on both sides of the valve core in the valve hole. The gasket is arranged between the plug and the valve core. The valve hole is provided with a limit step to limit the gasket from moving toward the valve core. A flexible member is also provided between the gasket and the plug. The gasket is used to connect with the first oil inlet hole and the second oil inlet hole on the valve body. The valve core will impact the gasket during movement, damaging the plug. The buffering effect can be activated by providing the flexible member.
[0012] Preferably, the flexible member is an O-ring.
[0013] Preferably, an annular groove is provided on the side wall of the valve core, and the sealing ring is installed in the annular groove. The structure plays a role in positioning the sealing ring.
[0014] Preferably, a retaining ring is also installed in the annular groove in which the second sealing ring is installed.
[0015] Preferably, the joint between the oil outlet hole and the valve hole is spherical. The structure avoids turbulence in the oil outlet hole and reduces eddy current.
[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) by using multiple sets of sealing rings, the first oil inlet hole and the second oil inlet hole are prevented from being connected during the movement of the valve core, causing the oil in one oil tank to enter the other oil tank; (2) the flexible member arranged at the gasket reduces the impact of the valve core on the thread plug, thereby extending the life of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the utility model;
[0018] In the figure:
[0019] Valve body 1, valve core 2, wire plug 3, first oil inlet hole 4, second oil inlet hole 5, oil outlet hole 6, first sealing ring 7, second sealing ring 8, gasket 9, flexible member 10, annular groove 11, retaining ring 12, radial outlet 13. DETAILED DESCRIPTION
[0020] The present disclosure is further described below in conjunction with the accompanying drawings and embodiments.
[0021] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.
[0022] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0023] In the present disclosure, terms such as "fixed connection", "connected", "connection", etc. should be understood in a broad sense, indicating that it can be fixedly connected, integrally connected or detachably connected; it can be directly connected or indirectly connected through an intermediate medium. For relevant scientific research or technical personnel in this field, the specific meanings of the above terms in the present disclosure can be determined according to specific circumstances, and they cannot be understood as limitations on the present disclosure.
[0024] Embodiment 1:
[0025] A shuttle valve structure, reference Figure 1As shown, it includes a valve body 1, a valve core 2 and a wire plug 3, the valve body 1 has a valve hole and a first oil inlet hole 4, a second oil inlet hole 5 and an oil outlet hole 6 connected to the valve hole in a radial direction, the wire plug 3 is fixedly connected to at least one end of the valve hole, the valve core 2 is slidably connected in the valve hole, and the valve core 2 is symmetrically provided with radial outlets 13 and sealing rings sleeved on the side walls of the valve core 2, the sealing rings are sleeved on both sides of the radial outlets 13, so that the two radial outlets 13 are in a disconnected state during the movement of the valve core 2. In some embodiments, the sealing ring includes a first sealing ring 7 and a second sealing ring 8, the first sealing ring 7 is located outside the two radial outlets 13, the second sealing ring 8 is located inside the radial outlets 13, the diameter of the joint between the oil outlet 6 and the valve hole is smaller than the width of the two second sealing rings 8, and the structure enables that when the second sealing ring 8 corresponding to a radial outlet 13 slides out of the oil outlet 6 during the sliding process of the valve core 2, the other second sealing ring 8 is still at the joint position between the valve hole and the oil outlet 6, which can further avoid the two inlets from being connected; in other possible embodiments, the width of the second sealing ring 8 is larger than that of the first sealing ring 7. The structure enables the second sealing ring 8 to have better sealing performance and can further avoid the two inlets from being connected.
[0026] Specifically, an annular groove 11 is provided on the side wall of the valve core 2, and the sealing ring is installed in the annular groove 11. The structure plays a role in positioning the sealing ring. A retaining ring 12 is also installed in the annular groove 11 where the second sealing ring 8 is installed.
[0027] In some embodiments, the junction between the oil outlet hole 6 and the valve hole is spherical. The structure avoids turbulence in the oil outlet hole 6 and reduces eddy current.
[0028] Embodiment 2:
[0029] On the basis of Example 1:
[0030] It also includes a gasket 9, two gaskets 9 are installed on both sides of the valve core 2 in the valve hole, the gasket 9 is arranged between the plug 3 and the valve core 2, the valve hole is provided with a limit step to limit the gasket 9 from moving in the direction of the valve core 2, and a flexible member 10 is also provided between the gasket 9 and the plug 3. The gasket 9 is used to connect with the first oil inlet hole 4 and the second oil inlet hole 5 on the valve body 1. The valve core 2 will impact the gasket 9 during movement, damaging the plug 3, and the buffering effect can be activated by providing the flexible member 10. Among them, the flexible member 10 is an O-ring.
[0031] The valve hole is provided on the valve body 1 and is a through hole, and the plug 3 closes the valve hole in the axial direction. The outer diameter of the valve core 2 is adapted to the aperture of the valve hole so that the valve core 2 can slide in the valve hole. When the first oil inlet hole 4 and the second oil inlet hole 5 are connected to an external oil circuit such as a common relief oil tank and an auxiliary relief oil tank, the valve core 2 will be subjected to the oil pressure from the first oil inlet hole 4 and the second oil inlet hole 5 in the axial direction and in opposite directions. Since the valve core 2 is a symmetrical structure, the side with greater oil pressure will produce greater force, pushing the valve core 2 to move to the other side. The radial outlet 13 on the valve core 2 is connected to the oil outlet 6 to form a corresponding passage. By arranging sealing rings on both sides of the radial outlet 13, the sealing ability of the radial outlet 13 is enhanced, so that the oil entering the oil outlet 6 cannot enter the other radial outlet through the gap between the valve core 2 and the valve hole. In addition, the sealing rings arranged on both sides of the radial outlet 13 always block the communication between the two radial outlets 13.
[0032] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.
Claims
1. A shuttle valve structure, characterized in that: The utility model comprises a valve body, a valve core and a wire plug, wherein the valve body has a valve hole and a first oil inlet hole, a second oil inlet hole and an oil outlet hole which are connected to the valve hole in a radial direction, the wire plug is fixedly connected to at least one end of the valve hole, the valve core is slidably connected in the valve hole, and radial outlets and sealing rings which are sleeved on the side walls of the valve core are symmetrically arranged on the valve core, and the sealing rings are sleeved on both sides of the radial outlets so that the two radial outlets of the valve core are in a disconnected state during the movement of the valve core.
2. A shuttle valve structure according to claim 1, characterized in that: The sealing ring includes a first sealing ring and a second sealing ring. The first sealing ring is located outside the two radial outlets, and the second sealing ring is located inside the radial outlets. The diameter of the joint between the oil outlet and the valve hole is smaller than the width of the two second sealing rings.
3. A shuttle valve structure according to claim 2, characterized in that: The width of the second sealing ring is greater than that of the first sealing ring.
4. A shuttle valve structure according to claim 1, characterized in that: It also includes a gasket sleeve, which is installed on both sides of the valve core in the valve hole. The gasket sleeve is arranged between the plug and the valve core. The valve hole is provided with a limiting step for limiting the movement of the gasket sleeve toward the valve core. A flexible member is also provided between the gasket sleeve and the plug.
5. A shuttle valve structure according to claim 4, characterized in that: The flexible member is an O-ring.
6. A shuttle valve structure according to claim 2, characterized in that: An annular groove is arranged on the side wall of the valve core, and a sealing ring is installed in the annular groove.
7. A shuttle valve structure according to claim 6, characterized in that: A retaining ring is also installed in the annular groove where the second sealing ring is installed.
8. A shuttle valve structure according to any one of claims 1 to 7, characterized in that: The joint between the oil outlet hole and the valve hole is spherical.