Drain valve and air cylinder assembly
By designing a simplified drain valve structure and utilizing the adjustment and stop mechanisms of the valve core and valve body, the problem of complex installation of existing air cylinder drain plugs has been solved, achieving low-cost and convenient air cylinder water drainage.
Patent Information
- Application Number
- CN202520514723.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-24
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-03-24
AI Technical Summary
The existing drainage plug door structure of the air cylinder of rail vehicles is complex, difficult to install and costly, and the handle position is inconvenient to operate.
A drain valve comprising a valve body and a valve core is designed. By adjusting the structure, the valve core can be moved along the axial direction of the valve cavity to achieve switching between the first and second states. Combined with a stop structure and a sealing ring, the sealing effect is ensured and the operation is simplified.
It achieves easy and low-cost drainage of water accumulated in the air cylinder, avoiding the installation difficulties and high costs caused by complex structures, and ensuring sealing and convenience.
Smart Images
Figure CN223778365U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of rail vehicle braking, and in particular to a drain valve and air cylinder assembly. Background Technology
[0002] The braking system of a rail vehicle includes a cylinder for supplying compressed air. During use, water can accumulate inside the cylinder. Therefore, when maintaining the braking system, it is necessary to drain the water from the cylinder.
[0003] In existing technology, a drain plug is installed on the air cylinder to drain the water. Once the drain plug is opened, the water in the air cylinder can be drained. However, the existing drain plug has a complex structure, is difficult to install, and has a high manufacturing cost. Moreover, after installation, the handle may be in a position that is not conducive to manual operation. Utility Model Content
[0004] The purpose of this utility model is to provide a drain valve that is easy to operate and low in cost, and an air cylinder assembly including the same.
[0005] To achieve the above objectives, this utility model provides a drain valve, including a valve body, a valve cavity extending through the valve body, and a valve core cooperating with the valve cavity. A valve channel is formed inside the valve core, and the valve channel includes a first port located on the outer peripheral surface of the valve core and a second port communicating with the valve channel and the outside of the valve core.
[0006] An adjustment structure is formed between the valve core and the valve body. The adjustment structure is used to adjust the relative position between the valve body and the valve core along the axial direction of the valve cavity. The drain valve includes a first state in which the first port extends out of the valve cavity and a second state in which the first port is located inside the valve cavity. When the drain valve is in the second state, the valve body and the valve core cooperate to close the first port.
[0007] As a further improvement of this utility model, a stop structure is also formed between the valve core and the valve body, the stop structure being used to limit the range of relative movement of the valve core and the valve body in the axial direction of the valve cavity.
[0008] As a further improvement of this utility model, the stop structure includes a protrusion that protrudes from the outer peripheral surface of the valve core and an abutting surface on the valve body for abutting the protrusion, wherein the protrusion is located outside the valve cavity.
[0009] As a further improvement of this utility model, the first port is provided with multiple first ports, and the drain valve further includes a first sealing ring and a second sealing ring disposed between the valve core and the valve body. The first sealing ring and the second sealing ring are respectively located on both sides of the multiple first ports in the axial direction of the valve cavity.
[0010] As a further improvement of this utility model, the valve core includes a core portion that cooperates with the valve cavity and an adjustment portion connected to the core portion, wherein the adjustment structure is formed between the adjustment portion and the valve body.
[0011] As a further improvement of this utility model, the adjustment structure includes an external thread formed on the adjustment part and a threaded hole opened on the valve body and cooperating with the external thread.
[0012] As a further improvement of this utility model, the valve cavity includes a third port away from the adjusting part in its axial direction. When the drain valve is in the first state, the first port extends out of the valve cavity from the third port, and the second port is located at the end of the valve core away from the third port in the axial direction of the valve cavity.
[0013] As a further improvement of this utility model, the valve core also includes a knob connected to one end of the adjustment part in the axial direction of the valve cavity away from the core part, and the outer peripheral surface of the knob is provided with anti-slip texture.
[0014] As a further improvement of this utility model, the valve body includes a first shaft segment and a second shaft segment connected to each other, the third port is opened at the end of the first shaft segment away from the second shaft segment, the outer periphery of the first shaft segment is provided with a connecting thread for connecting an external structure, the second shaft segment has a first end face close to the first shaft segment, and the drain valve also includes a third sealing ring provided at the first end face.
[0015] This utility model also provides a cylinder assembly for use in the braking system of a rail vehicle, and includes a cylinder and the aforementioned drain valve connected to the cylinder.
[0016] Beneficial effects:
[0017] The drain valve provided by this utility model allows the valve core to move circumferentially along the valve cavity by adjusting the adjustment structure during use, thereby switching the drain valve between the first and second states. The structure is simple, the cost is low, and it is easy for operators to operate. Attached Figure Description
[0018] Figure 1 A front view schematic diagram of a drain valve provided in an embodiment of the present utility model;
[0019] Figure 2 for Figure 1 A schematic diagram of the drain valve cut open along the AA direction, showing the drain valve in the second state;
[0020] Figure 3 for Figure 1A schematic diagram of the drain valve cut open along the AA direction, where the drain valve is in the first state;
[0021] Figure 4 An exploded view of a drain valve provided in an embodiment of this utility model;
[0022] Figure 5 for Figure 1 A three-dimensional structural diagram of the valve body.
[0023] In the picture:
[0024] 100. Drain valve;
[0025] 10. Valve body; 11. Valve cavity; 12. Third port; 13. First shaft section; 131. Connecting thread; 14. Second shaft section; 141. First end face;
[0026] 20. Valve core; 21. Core body; 22. Adjustment section;
[0027] 30. Valve passage; 31. First port; 32. Second port;
[0028] 40. Adjustment structure; 41. External thread; 42. Threaded hole;
[0029] 50. Stop structure; 51. Protrusion; 52. Abutment surface; 53. Stop pin;
[0030] 60. First sealing ring; 61. Second sealing ring; 62. Third sealing ring;
[0031] 70. Knob. Detailed Implementation
[0032] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any modifications to the mechanism, method, or function made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.
[0033] The terms used herein, such as "up," "down," "left," "right," "front," and "back," indicating spatial relative position, are for illustrative purposes to describe the relationship of one feature relative to another, as shown in the accompanying drawings. It is understood that, depending on the product's placement, these terms may be intended to include different orientations besides those shown in the figures, and should not be construed as limiting the claims. Furthermore, the descriptive term "horizontal" used herein is not entirely equivalent to being perpendicular to the direction of gravity, and allows for a certain angle of inclination.
[0034] This invention provides an air cylinder assembly for use in the braking system of rail vehicles. The air cylinder assembly includes an air cylinder and a drain valve connected to the air cylinder. In the braking system of rail vehicles, the air cylinder is used to supply compressed air. During use, water may accumulate inside the air cylinder, and the drain valve is used to drain the accumulated water from the air cylinder.
[0035] As can be seen, the aforementioned drain valve is not limited to use on air cylinders, but can also be applied in other situations.
[0036] like Figure 1-5 As shown, the drain valve 100 includes a valve body 10, a valve cavity 11 that penetrates the valve body 10, and a valve core 20 that cooperates with the valve cavity 11. A valve channel 30 is formed inside the valve core 20. The valve channel 30 includes a first port 31 located on the outer peripheral surface of the valve core 20 and a second port 32 that connects the valve channel 30 and the outside of the valve core 20. The first port 31 and the second port 32 are connected.
[0037] An adjustment structure 40 is formed between the valve core 20 and the valve body 10. By adjusting the adjustment structure 40, the relative position between the valve cores 20 of the valve body 10 can be adjusted along the axial direction of the valve cavity 11.
[0038] Under the action of the adjusting structure 40, the valve core 20 can move relative to the valve body 10 along the axial direction of the valve cavity 11, so that the drain valve 100 can be in the first state (e.g. Figure 3 (as shown) and the second state (as shown) Figure 2 The valve 100 switches between the following states: Specifically, when the valve core 20 extends out of the valve chamber 11, causing the first port 31 on the valve core 20 to extend out of the valve chamber 11, the drain valve 100 is in the first state. When the valve core 20 retracts into the valve chamber 11, causing the first port 31 on the valve core 20 to be located inside the valve chamber 11, the drain valve 100 is in the second state. When the drain valve 100 is in the second state, the valve body 10 and the valve core 20 cooperate to close the first port 31.
[0039] When in use, the drain valve 100 has its body 10 connected to the air cylinder. When the drain valve 100 is in its first state, i.e., when the first port 31 extends out of the valve chamber 11, water in the air cylinder can enter the valve passage 30 through the first port 31 and then flow out of the valve passage 30 through the second port 32. In this way, the water in the air cylinder can be discharged through the drain valve 100. When the drain valve 100 is in its second state, water in the air cylinder cannot enter the valve passage 30 through the first port 31, and naturally cannot be discharged outward through the drain valve 100.
[0040] The drain valve 100 is normally in the second state. When it is necessary to drain the water in the air cylinder, the adjustment structure 40 is adjusted to change the drain valve 100 from the second state to the first state, so that the water in the air cylinder can be discharged outward through the drain valve 100.
[0041] When using the drain valve 100 provided in this embodiment, the adjustment structure 40 is adjusted to move the valve core 20 along the circumferential direction of the valve cavity 11, so that the drain valve 100 can switch between the first state and the second state. The structure is simple, the cost is low, and it is easy for operators to operate.
[0042] In this embodiment, a stop structure 50 is also formed between the valve core 20 and the valve body 10. The stop structure 50 is used to limit the range of relative movement between the valve core 20 and the valve body 10 in the axial direction of the valve cavity 11. Under the action of the stop structure 50, the valve core 20 can only move relative to the valve body 10 within a preset range. In this way, the valve core 20 can be prevented from detaching from the valve body 10.
[0043] In this embodiment, the stop structure 50 includes a protrusion 51 protruding from the outer peripheral surface of the valve core 20, an abutting surface 52 on the valve body 10 for abutting the protrusion 51, and the protrusion 51 is located outside the valve cavity 11. Figure 2 As shown, the protrusion 51 is located above the valve body 10. During the downward movement of the valve core 20, if the protrusion 51 abuts against the abutment surface 52, the valve core 20 can no longer move downward. In this way, the range of movement of the valve core 20 is limited, preventing the valve core 20 from detaching from the valve body 10.
[0044] Specifically, the drain valve 100 also includes a stop pin 53 that passes through the valve core 20 in the radial direction. The length of the stop pin 53 is greater than the diameter of the valve core 20. Therefore, a part of the stop pin 53 must protrude from the valve core 20. The part of the stop pin 53 that protrudes from the valve core 20 is the protrusion 51 mentioned above.
[0045] In this embodiment, multiple first ports 31 are provided, and the multiple first ports 31 can be evenly distributed around the valve core 20. By providing multiple first ports 31, water in the air cylinder can enter the valve channel 30 from multiple directions. Specifically, four first ports 31 can be provided, and the four first ports 31 are evenly distributed along the circumferential direction of the valve core 20.
[0046] The drain valve 100 also includes a first sealing ring 60 and a second sealing ring 61 disposed between the valve core 20 and the valve body 10. The first sealing ring 60 and the second sealing ring 61 are respectively located on both sides of a plurality of first ports 31 in the axial direction of the valve cavity 11. The first sealing ring 60 and the second sealing ring 61 respectively seal the gap between the valve body 10 and the valve core 20 on both sides of the first port 31. Under the action of the first sealing ring 60 and the second sealing ring 61, when the drain valve 100 is in the second state, that is, when the first port 31 is located in the valve cavity 11, the fluid cannot flow to the first port 31 through the gap between the valve body 10 and the valve core 20, thus ensuring the sealing effect of the drain valve 100.
[0047] The valve core 20 includes a core portion 21 that mates with the valve cavity 11 and an adjusting portion 22 connected to the core portion 21. The adjusting structure 40 is formed between the adjusting portion 22 and the valve body 10. This arrangement effectively divides the valve core 20 into two parts: the core portion 21, which mates with the valve cavity 11, and the adjusting portion 22, which mates with the valve body 10. This facilitates the formation of a seal between the core portion 21 and the valve cavity 11, and also facilitates the formation of the adjusting structure 40 between the adjusting portion 22 and the valve body 10 to control the movement of the core portion 21 along the axial direction of the valve cavity 11.
[0048] The adjustment structure 40 includes an external thread 41 formed on the adjustment part 22 and a threaded hole 42 opened on the valve body 10 and cooperating with the external thread 41. When the valve core 20 is rotated, the external thread 41 on the adjustment part 22 will also rotate. The external thread 41 cooperates with the threaded hole 42, so that the valve core 20 can move along the axial direction of the valve cavity 11, thereby enabling the drain valve 100 to switch between the first state and the second state.
[0049] The valve chamber 11 includes a third port 12 located axially away from the adjusting part 22. When the drain valve 100 is in the first state, the first port 31 extends out of the valve chamber 11 from the third port 12, and the second port 32 is located at the end of the valve core 20 located axially away from the third port 12 in the valve chamber 11. With this arrangement, the second port 32 is located at the end of the valve core 20. When water is discharged through the second port 32, it will not flow through other parts of the drain valve 100, thus keeping the surface of the drain valve 100 clean and dry.
[0050] The valve core 20 also includes a knob 70 connected to the end of the adjusting part 22 located axially away from the core part 21 in the valve cavity 11. The outer peripheral surface of the knob 70 is provided with anti-slip texture. By rotating the knob 70, relevant personnel can easily drive the adjusting part 22 and the entire valve core 20 to rotate, thereby switching the drain valve 100 between the first and second states. The anti-slip texture design on the outer peripheral surface of the knob 70 can prevent slippage when the knob 70 is turned.
[0051] The valve body 10 includes a first shaft segment 13 and a second shaft segment 14 connected to each other. A third port 12 is opened at the end of the first shaft segment 13 away from the second shaft segment 14. The outer periphery of the first shaft segment 13 is provided with a connecting thread 131 for connecting to an external structure. The second shaft segment 14 has a first end face 141 close to the first shaft segment 13. The drain valve 100 also includes a third sealing ring 62 provided at the first end face 141.
[0052] With the above configuration, the valve body 10 can be connected to the air cylinder via the connecting thread 131 on the first shaft section 13, and when the first shaft section 13 is connected to the air cylinder, the first end face 141 fits against the air cylinder, and the third sealing ring 62 provides a sealing effect between the first end face 141 and the air cylinder.
[0053] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
[0054] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.
Claims
1. A drain valve, characterized in that, The valve includes a valve body, a valve cavity extending through the valve body, and a valve core that mates with the valve cavity. A valve channel is formed within the valve core, and the valve channel includes a first port located on the outer circumferential surface of the valve core and a second port connecting the valve channel and the outside of the valve core. An adjustment structure is formed between the valve core and the valve body. The adjustment structure is used to adjust the relative position between the valve body and the valve core along the axial direction of the valve cavity. The drain valve includes a first state in which the first port extends out of the valve cavity and a second state in which the first port is located inside the valve cavity. When the drain valve is in the second state, the valve body and the valve core cooperate to close the first port.
2. The drain valve according to claim 1, characterized in that, A stop structure is also formed between the valve core and the valve body, which is used to limit the range of relative movement of the valve core and the valve body in the axial direction of the valve cavity.
3. The drain valve according to claim 2, characterized in that, The stop structure includes a protrusion extending from the outer peripheral surface of the valve core and an abutting surface on the valve body for abutting the protrusion, the protrusion being located outside the valve cavity.
4. The drain valve according to claim 1, characterized in that, The first port is provided with multiple ports, and the drain valve further includes a first sealing ring and a second sealing ring disposed between the valve core and the valve body. The first sealing ring and the second sealing ring are respectively located on both sides of the multiple first ports in the axial direction of the valve cavity.
5. The drain valve according to claim 1, characterized in that, The valve core includes a core portion that mates with the valve cavity and an adjustment portion connected to the core portion, wherein the adjustment structure is formed between the adjustment portion and the valve body.
6. The drain valve according to claim 5, characterized in that, The adjustment structure includes an external thread formed on the adjustment part and a threaded hole opened in the valve body and cooperating with the external thread.
7. The drain valve according to claim 5, characterized in that, The valve cavity includes a third port located away from the adjusting part in its axial direction. When the drain valve is in the first state, the first port extends out of the valve cavity from the third port, and the second port is located at the end of the valve core located away from the third port in the axial direction of the valve cavity.
8. The drain valve according to claim 5, characterized in that, The valve core also includes a knob connected to the end of the adjustment part in the axial direction of the valve cavity away from the core part, and the outer peripheral surface of the knob is provided with anti-slip texture.
9. The drain valve according to claim 7, characterized in that, The valve body includes a first shaft segment and a second shaft segment connected to each other. The third port is opened at the end of the first shaft segment away from the second shaft segment. The outer periphery of the first shaft segment is provided with a connecting thread for connecting to an external structure. The second shaft segment has a first end face close to the first shaft segment. The drain valve also includes a third sealing ring provided at the first end face.
10. A pneumatic cylinder assembly for use in a braking system of a rail vehicle, characterized in that, Includes a blower cylinder and a drain valve as described in any one of claims 1-9 connected to the blower cylinder.