A duct connector and a car coupler

Abstract

The present application relates to a kind of air pipe connectors and car coupler, belong to rail vehicle car coupler technical field, the air pipe connector includes valve body, valve stem and valve head;Wherein, valve body has the cavity in length direction with two ends communication, the first end of valve body is fixedly connected with air pipe, the second end of valve body is open;Valve stem is installed in cavity, and with valve body axial sliding connection;The first end of valve stem is close to air pipe, the internal air passage of valve stem is communicated with the air passage of air pipe;Valve head is installed in the second end of valve body, and with valve body axial sliding connection;Valve head is detachably connected with valve stem and synchronous movement along the axial direction of valve body;The middle part of valve head is equipped with the opening that is communicated with the internal air passage of valve stem.This air pipe connector can realize the synchronous triggering of valve head and valve stem, make up the blank of the synchronous triggering condition of valve head and valve stem in traditional air pipe connector, enrich the working condition and application scene of China's subway, high-speed rail train.

Description

Technical Field

[0001] This invention belongs to the field of railway vehicle coupler technology, and particularly relates to a duct connector and coupler. Background Technology

[0002] The coupler is a component used to automatically connect and disconnect the mechanical parts of a train, transmitting traction and impact forces. Air duct connectors are installed on the coupler to enable automatic connection and disconnection of the train's air ducts.

[0003] Duct connectors are mostly of the floating valve head type, and there are two triggering methods for the valve head and valve stem: separate triggering and synchronous triggering. In my country, duct connectors for subways and high-speed trains are mostly of the separate triggering type, while the design of the synchronous triggering type is still a blank in my country.

[0004] Therefore, how to provide a duct connector that allows for synchronous triggering of the valve head and valve stem is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a duct connector that solves the problem of separate triggering of the valve head and valve stem in current duct connectors by detachably connecting and synchronously moving the valve head and valve stem, thus enriching the working conditions and application scenarios of subways and high-speed trains in my country.

[0006] This invention provides a duct connector, comprising: The valve body has a cavity with two open ends along its length. The first end of the valve body is fixedly connected to the air duct, and the second end of the valve body is open. The valve stem is installed inside the cavity and is axially slidably connected to the valve body; the first end of the valve stem is close to the air duct, and the internal air passage of the valve stem is connected to the air passage of the air duct. The valve head is installed at the second end of the valve body and is axially slidably connected to the valve body; the valve head is detachably connected to the valve stem and moves synchronously along the axial direction of the valve body; the middle part of the valve head is provided with an opening that communicates with the internal air passage of the valve stem.

[0007] This technical solution's duct connector enables synchronous triggering of the valve head and valve stem.

[0008] In some embodiments, the second end of the valve stem is provided with a first limiting part, and the end of the valve head near the valve stem is provided with a second limiting part. The first limiting part and the second limiting part match, and the valve head is detachably connected to the first limiting part of the valve stem through the second limiting part. This technical solution controls the range of motion of the valve head and valve stem by limiting the first and second limiting parts, making the detachable connection of the valve head and valve stem more reliable and ensuring synchronous triggering of the valve head and valve stem.

[0009] In some embodiments, an axial clearance and a radial clearance are provided between the first limiting part and the second limiting part. This technical solution increases the degree of freedom of movement of the valve head relative to the valve stem by setting the axial and radial clearances, ensuring that the valve head can float within a certain range, allowing the two air duct connectors to connect smoothly when there is an angle between the two coupler connection surfaces.

[0010] In some embodiments, the first limiting part includes a plug-in post and a boss, and the second limiting part includes a retaining ring for inserting the plug-in post, with a groove on the retaining ring that matches the boss; an axial clearance and a radial clearance are provided between the boss and the groove, and a radial clearance is provided between the retaining ring and the plug-in post. This technical solution achieves a detachable connection between the valve head and the valve stem through the insertion connection of the plug-in post and the retaining ring; the cooperation between the boss and the groove restricts the movement between the valve head and the valve stem, avoiding excessive movement; at the same time, it facilitates the individual assembly and disassembly of the valve head 3.

[0011] In some embodiments, the duct connector further includes a first seal that fits tightly against the end of the valve head away from the valve body, and a through hole is formed in the middle of the first seal that communicates with the opening of the valve head. This technical solution ensures the airtightness of the airflow through the tight fit of the first seal; and achieves continuity and unobstructed airflow through the through hole of the first seal communicating with the opening of the valve head.

[0012] In some embodiments, the first seal has an air chamber inside. This technical solution, through the air chamber, allows the air pressure on both sides to press the sealing ring tightly, making the seal ring fit more closely with the valve head and improving the airtightness of the duct connector. After the coupler is connected, the pressing action of the air chamber on the first seal ensures a tight fit between the first seals of the two duct connectors, further improving the airtightness of the air passage.

[0013] In some embodiments, the second end of the valve stem is further provided with a hollow fastener. The fastener passes through the through hole of the first seal and the opening of the valve head, and extends into the interior of the valve stem to define the position of the first seal and the valve head. This technical solution fixes the position of the first seal by setting the fastener, preventing the first seal from shifting or falling off; at the same time, the hollow interior of the fastener ensures the continuity and unobstructed flow of air.

[0014] In some embodiments, the valve body has a limiting step inside to restrict the range of movement of the valve stem. The duct connector also includes a second seal for sealing the limiting step and the valve stem. The second seal is located at the limiting step and installed on the periphery of the valve stem. This technical solution achieves a seal between the valve body and the valve stem in the single-hook state through the second seal.

[0015] In some embodiments, an elastic element is also provided within the cavity of the valve body, and the elastic element is sleeved on the valve stem; one end of the elastic element abuts against the valve head, and the other end abuts against the limiting step. This technical solution uses the elastic element to press the valve head tightly, thus limiting the range of motion of the valve head.

[0016] In addition, the present invention also provides a coupler, wherein the air duct connector of the coupler adopts the above-mentioned air duct connector.

[0017] Based on the above solution, the duct connector in this embodiment of the invention can achieve synchronous triggering of the valve head and valve stem, and can be successfully triggered regardless of whether there is an angle between the two coupler connection surfaces; and the airtightness of the valve head of the duct connector is ensured by setting the first sealing element and its air chamber. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a structural schematic diagram of a duct connector; Figure 2 For along Figure 1 Sectional view of line AA in the middle; Figure 3 This is a 3D schematic diagram of a duct connector; Figure 4 This is a schematic diagram showing the connection between the valve head and the valve stem. Figure 5 This is a schematic diagram of the valve head and valve stem. Figure 6 This is a schematic diagram of the connection when the two couplers are connected without an included angle in an embodiment of the present invention; Figure 7 This is a schematic diagram of the connection when the two couplers are connected at an angle in an embodiment of the present invention.

[0019] In the picture: 1. Valve body; 2. Valve stem; 3. Valve head; 4. First seal; 5. Fastener; 6. Second seal; 7. Flexible components; 8. End caps; 9. Air ducts; 11. Limiting step; 21. Air duct hole; 22. First limiting part; 221. Insertion post; 222. Boss; 23. Third limiting part; 24. First wrench holder; 31. Second limiting part; 311. Retaining ring; 312. Groove; 32. Second wrench holder; 41. Air chamber; 51. Stop washer; 61. Sealing washer; 62. Sealing seat; 63. Self-locking nut; 71. Compression spring; 72. Elastic column; 81. Sealing ring; 82. First screw; 83. Anti-loosening washer. Detailed Implementation

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "assembly" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] like Figure 1 As shown, in one embodiment of the duct connector of the present invention, the duct connector includes a valve body 1, a valve stem 2, and a valve head 3; wherein, the valve body 1 has a cavity with two communicating ends in the length direction, the first end of the valve body 1 is fixedly connected to the duct 9, and the second end of the valve body 1 is open; the valve stem 2 is installed in the cavity and is axially slidably connected to the valve body 1; the first end of the valve stem 2 is close to the duct 9, and the internal air passage of the valve stem 2 is connected to the air passage of the duct 9; the valve head 3 is installed at the second end of the valve body 1 and is axially slidably connected to the valve body 1; the valve head 3 is detachably connected to the valve stem 2 and moves synchronously along the axial direction of the valve body 1; the middle part of the valve head 3 is provided with an opening that communicates with the internal air passage of the valve stem 2.

[0025] In the above illustrative embodiments, the duct connector can realize the synchronous triggering of valve head 3 and valve stem 2. When it is necessary to connect or disconnect the coupler air circuit, only valve head 3 needs to be triggered, and valve stem 2 can be triggered together with valve head 3 to realize the connection or disconnection of duct 9. This fills the gap in the synchronous triggering of valve head and valve stem in traditional duct connectors and enriches the working conditions and application scenarios of subway and high-speed trains in my country.

[0026] It should be noted that, in order to ensure that the air passage of the duct 9 is connected to the internal air passage of the valve stem 2, the diameter of the first end of the valve stem 2 is smaller than the diameter of the duct 9, and the valve stem 2 has an air passage hole 21; such as Figure 5 As shown, the ventilation holes 21 have multiple openings.

[0027] In some embodiments, such as Figure 5 As shown, the second end of the valve stem 2 is provided with a first limiting part 22, and the end of the valve head 3 near the valve stem 2 is provided with a second limiting part 31. The first limiting part 22 and the second limiting part 31 are matched, and the valve head 3 is detachably connected to the first limiting part 22 of the valve stem 2 through the second limiting part 31. Through the limiting effect of the first limiting part 22 and the second limiting part 31, the relative movement range of the valve head 3 and the valve stem 2 is controlled, making the detachable connection of the valve head 3 and the valve stem 2 more reliable, and ensuring the synchronous triggering of the valve head 3 and the valve stem 2.

[0028] Furthermore, an axial clearance and a radial clearance are provided between the first limiting part 22 and the second limiting part 31. It should be noted that there are two situations when the couplers are connected: the two coupler connection surfaces have no included angle and the two coupler connection surfaces have an included angle; for example... Figure 6 As shown, when there is no included angle between the two coupler connection surfaces, the two coupler connection surfaces can fit completely together, the air tightness of the air passage is good, and the coupler air passage is smoothly connected; as Figure 7 As shown, when the connecting surfaces of the two couplers are at an angle, the airtightness of the air passage cannot be guaranteed, leading to poor air passage connection between the two couplers and potentially connection failure. The floating of the valve head 3 relative to the valve stem 2 allows the valve heads 3 of the two air duct connectors to fit together, ensuring the airtightness of the air passage and making the connection of the coupler air passage smoother. Specifically, by setting the axial and radial clearances, the degree of freedom of movement of the valve head 3 relative to the valve stem 2 is increased, ensuring that the valve head 3 can float within a certain range, thus ensuring the airtightness of the air passage when the connecting surfaces of the two couplers are at an angle.

[0029] In some embodiments, such as Figure 5As shown, the first limiting part 22 includes a plug-in post 221 and a boss 222, and the second limiting part 31 includes a retaining ring 311 for inserting the plug-in post 221. The retaining ring 311 has a groove 312 that matches the boss 222. There are axial and radial clearances between the boss 222 and the groove 312, and there is a radial clearance between the retaining ring 311 and the plug-in post 221. The plug-in post 221 and the retaining ring 311 are inserted to achieve a detachable connection between the valve head 3 and the valve stem 2. The cooperation between the boss 222 and the groove 312 restricts the movement between the valve head 3 and the valve stem 2, preventing excessive movement. At the same time, the detachable connection between the boss 222 and the groove 312 allows for easy disassembly and assembly of the valve head 3 without disassembling the duct connector.

[0030] It should be noted that, as Figure 5 As shown, the outer wall of the valve stem 2 is provided with a first wrench holder 24, and the outer wall of the valve head 3 is provided with a second wrench holder 32. The first wrench holder 24 and the second wrench holder 32 make it easier to disassemble and assemble the valve stem 2 and the valve head 3.

[0031] In some embodiments, such as Figure 1 As shown, the duct connector also includes a first sealing element 4, which fits tightly against the end of the valve head 3 away from the valve body 1. A through hole is formed in the middle of the first sealing element 4, communicating with the opening of the valve head 3. The tight fit of the first sealing element 4 ensures the airtightness of the air passage when the coupler is connected; the connection between the through hole of the first sealing element 4 and the opening of the valve head 3 ensures the continuity and unobstructed flow of the air passage.

[0032] It should be noted that the first sealing element 4 can be installed on the end of the valve head 3, or it can be vulcanized as a whole with the valve head 3. This embodiment does not limit this, and the appropriate installation method or manufacturing method can be selected according to the situation during manufacturing.

[0033] In some embodiments, such as Figure 1 As shown, the first sealing element 4 has an air chamber 41 inside. It should be noted that the air chamber 41 is located at the through hole of the first sealing element 4, and a space with a diameter larger than the through hole is provided around the through hole; this is the air chamber 41. Through the setting of the air chamber 41, the air pressure on both sides presses the first sealing element 4 tightly, making the first sealing element 4 fit more tightly with the valve head 3. Furthermore, after the coupler is connected, the pressing action of the air chamber 41 on the first sealing element 4 ensures a tight fit between the first sealing elements 4 of the two duct connectors, improving the airtightness of the air passage. Simultaneously, the setting of the air chamber 41 enables the self-adjustment of the first sealing element 4, allowing it to change according to the movement of the valve head 3, ensuring the sealing performance and stability of the duct connector.

[0034] In some embodiments, such as Figure 1As shown, the second end of the valve stem 2 is also provided with a hollow fastener 5. The fastener 5 passes through the through hole of the first seal 4 and the opening of the valve head 3, and extends into the interior of the valve stem 2 to limit the position of the first seal 4 and the valve head 3. Specifically, the fastener 5 can be a screw. By setting the fastener 5, the position of the first seal 4 and the valve head 3 is fixed to prevent the first seal 4 from shifting or falling off, and the axial movement range of the valve head 3 is limited; at the same time, the hollow interior of the fastener 5 ensures the continuity and unobstructed flow of air.

[0035] In some embodiments, such as Figure 1 As shown, a stop washer 51 is provided at the connection between the fastener 5 and the valve stem 2 to restrict the movement of the valve head 3.

[0036] In some embodiments, such as Figure 1 As shown, the valve body 1 has a limiting step 11 inside to restrict the movement range of the valve stem 2. The duct connector also includes a second sealing element 6 for sealing the limiting step 11 and the valve stem 2. The second sealing element 6 is located at the limiting step 11 and installed on the periphery of the valve stem 2. The second sealing element 6 seals the contact position between the limiting step 11 and the valve stem 2, thereby ensuring the airtightness of the duct connector in the single-hook state. It should be noted that the valve stem 2 has a third limiting part 23 that matches the limiting step 11. The third limiting part 23 limits the extreme position of the valve stem 2's movement, ensuring that during train rescue operations, the high air pressure on one side of the duct connector will not cause the duct connector on the windless side to fail to trigger. It should also be noted that when the couplers are connected, after the two coupler connection surfaces are in contact, the first sealing element 4 of the two couplers fits tightly, the valve head 3 is squeezed and retracted, and the valve head 3 pushes the valve stem 2 to retract synchronously (synchronous triggering). A gap is generated between the second sealing element 6 and the valve body 1, and the internal air passage of the valve stem 2 is connected to the air pipe 9 through the air passage hole 21.

[0037] In some embodiments, such as Figure 1 As shown, the second sealing element 6 includes a sealing washer 61 and a sealing seat 62 for fixing the sealing washer 61. The sealing seat 62 is installed on the side of the sealing washer 61 away from the limiting step 11. It should be noted that the sealing element is fixed to the valve stem 2 by a self-locking nut 63. The sealing washer 61 achieves the seal between the limiting step 11 and the valve stem 2, that is, the seal between the valve body 1 and the valve stem 2 is achieved, thereby ensuring the airtightness of the duct connector in the single-hook state; the sealing seat 62 prevents the sealing washer 61 from shifting or falling off; the self-locking nut 63 fixes the sealing seat 62, thereby indirectly ensuring the firmness of the sealing washer 61 and ensuring the airtightness of the device.

[0038] In some embodiments, such as Figure 1As shown, an elastic element 7 is also provided inside the cavity of the valve body 1, and the elastic element 7 is sleeved on the valve stem 2; one end of the elastic element 7 abuts against the valve head 3, and the other end abuts against the limiting step 11. The elastic element 7 presses the valve head 3 tightly, maintains the position of the valve head 3, and limits the range of movement of the valve head 3.

[0039] It should be noted that, as Figure 1 As shown, the elastic element 7 includes a compression spring 71, which is installed in the cavity of the valve body 1, with one end abutting against the valve head 3 and the other end abutting against the limiting step 11. The elastic element 7 also includes an elastic post 72, which is installed between the compression spring 71 and the valve stem 2, with one end abutting against the valve head 3 and the other end abutting against the limiting step 11. This embodiment provides a reference scheme for the specific setting of the elastic element 7. It should be noted that the elastic post 72 can also work with the first sealing element 4 to achieve airflow sealing after triggering.

[0040] In some embodiments, such as Figure 5 As shown, the valve body 1 is fixedly connected to the air duct 9 via the end cap 8. Specifically, as... Figure 1 As shown, the valve body 1 is fixedly connected to the end cover 8 by the first screw 82; to ensure the firmness of the first screw 82, an anti-loosening washer 83 is also provided at the connection between the first screw 82 and the end cover 8. Generally, the end cover 8 is welded to the air duct 9 as a whole, and to ensure the sealing between the end cover 8 and the valve body 1, a sealing ring 81 is provided between the end cover 8 and the valve body 1.

[0041] Based on the aforementioned duct connector, the present invention also provides a vehicle coupler that uses the aforementioned duct connector.

[0042] By applying the duct connectors in the above embodiments, synchronous triggering of the valve head 3 and valve stem 2 can be achieved, and triggering can be performed smoothly regardless of whether there is an angle between the two coupler connection surfaces. Other positive technical effects of the duct connectors in the above embodiments are also applicable to couplers, and will not be elaborated here.

[0043] The triggering process of an embodiment of the duct connector of the present invention will be described below with reference to the accompanying drawings: (1) There is no included angle between the connecting surfaces of the two couplers. like Figure 6 As shown, combined with Figure 1 After the two coupler connection surfaces are in contact, the first seal 4 of the two air duct connectors are tightly in contact, the valve head 3 is squeezed and pushed back, and the valve head 3 pushes the valve stem 2 to move back synchronously (i.e., synchronous triggering), thereby creating a gap between the sealing gasket 61 and the limiting step 11 of the valve body 1, and the air passage of the air duct 9 is connected to the internal air passage of the valve stem 2 through the air passage hole 21.

[0044] (2) The two coupler connection surfaces have an included angle. like Figure 7 As shown, combined with Figure 1Unlike the case where there is no included angle between the two coupler connection surfaces, there is an axial clearance and a radial clearance between the valve head 3 and the valve stem 2. The valve head 3 floats within a certain range, thereby making the first sealing element 4 of the two air duct connectors fit tightly.

[0045] Through the description of several embodiments of the duct connector of the present invention, it can be seen that the embodiments of the duct connector of the present invention have at least one or more of the following advantages: 1. The duct connector provided by the present invention enables the valve head 3 and valve stem 2 to be triggered synchronously through the detachable connection and synchronous movement of the valve head 3 and valve stem 2, which fills the gap in the synchronous triggering condition of the valve head 3 and valve stem 2 in the traditional duct connector, and enriches the working conditions and application scenarios of subway and high-speed trains in my country. 2. The duct connector provided by the present invention allows the valve head 3 to float relative to the valve stem 2 through the axial and radial clearances between the valve head 3 and the valve stem 2, ensuring the airtightness of the coupler connection when there is an angle between the coupler connection surfaces. 3. The duct connector provided by the present invention ensures a tight fit between the first sealing element 4 and the valve head 3 by setting an air chamber 41 in the first sealing element 4, and a tight fit between the first sealing elements 4 of the two duct connectors after the two couplers are connected, thereby improving the airtightness of the duct connector.

[0046] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A duct connector, characterized in that, include: The valve body has a cavity with two communicating ends in the length direction. The first end of the valve body is fixedly connected to the air duct, and the second end of the valve body is open. A valve stem is installed in the cavity and is axially slidably connected to the valve body; the first end of the valve stem is close to the air duct, and the internal air passage of the valve stem is connected to the air passage of the air duct; the second end of the valve stem is provided with a first limiting part; A valve head is mounted on the second end of the valve body and is axially slidably connected to the valve body. A second limiting portion is provided at the end of the valve head near the valve stem. The first limiting portion matches the second limiting portion. The valve head is detachably connected to the first limiting portion of the valve stem via the second limiting portion and moves synchronously with the valve stem along the axial direction of the valve body. An opening communicating with the internal air passage of the valve stem is provided in the middle of the valve head. An axial gap and a radial gap are provided between the first limiting part and the second limiting part; The first limiting part includes a plug and a boss, and the second limiting part includes a fixing ring for inserting the plug, and the fixing ring has a groove that matches the boss; there is an axial gap and a radial gap between the boss and the groove, and there is a radial gap between the fixing ring and the plug.

2. The duct connector according to claim 1, characterized in that, The duct connector also includes a first sealing element, which fits tightly against the end of the valve head away from the valve body, and a through hole is formed in the middle of the first sealing element that communicates with the opening of the valve head.

3. The duct connector according to claim 2, characterized in that, The first sealing element has an air chamber inside.

4. The duct connector according to claim 2 or 3, characterized in that, The second end of the valve stem is also provided with a hollow fastener, which passes through the through hole of the first seal and the opening of the valve head, and extends into the interior of the valve stem to define the position of the first seal and the valve head.

5. The duct connector according to claim 1, characterized in that, The valve body has a limiting step inside to restrict the range of motion of the valve stem. The duct connector also includes a second sealing element for sealing the limiting step and the valve stem. The second sealing element is disposed at the limiting step and installed on the periphery of the valve stem.

6. The duct connector according to claim 5, characterized in that, An elastic element is also provided inside the cavity of the valve body, and the elastic element is sleeved on the valve stem; one end of the elastic element abuts against the valve head, and the other end abuts against the limiting step.

7. A coupler, characterized in that, The air duct connector of the coupler is the air duct connector according to any one of claims 1 to 6.

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