Subway tunnel contact net busbar joint

Abstract

The invention relates to the field of railway facilities, in particular to a subway tunnel overhead line system busbar connector which comprises a connector body used for a subway tunnel overhead line system busbar, the connector body is installed between two adjacent busbar bodies in a sliding mode, and the connector body and the two adjacent busbar bodies are connected in an inserted mode through a plurality of inserting assemblies. A limiting device is movably installed at the position, close to any one of the multiple sets of plug-in assemblies, in the connector body, the connector body is used for connecting every two adjacent sets of busbar bodies, the plug-in assemblies are used for conducting plug-in connection on the connector body and the busbar bodies, and the limiting devices are used for locking and limiting the plug-in assemblies; the connecting and fixing structure of an existing busbar is improved through the design of the multiple sets of inserting assemblies and the limiters, an inserting limiting fixing mode is adopted, the stability and reliability of subway operation are improved, the subway operation direction, the inserting direction and the limiting direction correspond to the X axis, the Z axis and the Y axis respectively, and the stability and reliability of subway operation are further improved.

Description

Technical Field

[0001] The invention relates to the field of railway facilities, and in particular to a subway tunnel contact network busbar joint. Background Art

[0002] The main function of the subway contact network busbar joint is to ensure the continuity and stability of power transmission. The busbar joint connects two sections of the busbar so that they can be flexibly connected while maintaining electrical contact, thereby ensuring the continuity of power supply. If the joint is missing, it may cause electrical disconnection, affecting train operation and even causing accidents. The busbar joint ensures the stable transmission of electricity between the buses through mechanical and electrical connections. The design of the joint needs to comply with the technical standards for railway electrification, be able to work normally under adverse climatic conditions, and withstand the vibration and pressure of train operation.

[0003] And in the application document with publication number CN218750418U, a busbar for railway contact network is mentioned. The busbar for railway contact network is provided with a limit plate and a cavity. Under the premise of not significantly increasing the weight of the busbar, the above design can increase the cross-sectional height of the busbar body, so that the rigidity of the busbar is greatly increased, thereby improving the cross-sectional inertia moment of the busbar, ensuring the contact requirements between the pantograph and the contact line, and when two adjacent busbars are connected, first one end of the two plug-in plates is connected and fixed to one busbar, and then the other end of the two plug-in plates is connected and fixed to the other busbar, and at the same time, a plurality of threaded holes are opened on the plug-in plates, and a plurality of through holes are opened on the clamping wall, and the plurality of through holes are evenly arranged on both sides of the limit protrusion, and one end of the connecting bolt is screwed into the threaded hole after passing through the through hole, and a spring washer is sleeved on the connecting bolt, and the spring washer is arranged on the outside of the two clamping walls, so as to realize the connection and fixation of the two adjacent groups of buses,

[0004] However, during the operation of the subway, the connection and fixing method of the above-mentioned busbar has certain defects, as follows: during the operation of the subway, the contact and suspension parts are vibrated, and this vibration is in an uninterrupted state. In addition, the subway operating trains have short running time intervals and high traffic density. The energy generated by the vibration continues to accumulate. As the operating time accumulates, the thread loosening and slipping faults will occur in the relatively weak middle joint parts, which directly affects the stability and reliability of the subway operation.

[0005] Therefore, it is particularly important to improve the connection and fixing method of the existing busbar and design a subway tunnel contact network busbar joint to solve the above-mentioned technical defects and improve the stability and reliability of subway operation. Summary of the invention

[0006] The purpose of the present invention is to provide a subway tunnel contact network busbar joint, which improves the connection and fixing structure of the existing busbar through the design of multiple groups of plug-in components and limiters, adopts a plug-in and limit fixing method, effectively avoids the vibration of various contact suspension parts during the operation of the subway, and this vibration is in an uninterrupted state. In addition, the subway operation train has a short time interval and a large traffic density, and the energy generated by the vibration is continuously superimposed. With the accumulation of operation time, the thread loosening and slipping fault problems will occur in the middle joint part where the connection is relatively weak, thereby improving the stability and reliability of the subway operation. The subway operation direction, plug-in direction, and limit direction correspond to the X, Z, and Y axes respectively, so that the connection between the two adjacent busbar bodies is more stable and reliable, thereby The stability and reliability of subway operation are further improved, and a force is applied downward to the limit rod. At this time, under the force, the limit rod compresses the spring, and at the same time, the limit slide slides downward inside the limit protection groove until the plug-in hole is aligned with the inner fixed plug-in hole and the outer fixed plug-in hole, and the transverse plug-in rod is passed through the inner fixed plug-in hole and the outer fixed plug-in hole after the center of the circle is aligned, and the joint body and the bus body are plugged in. After plugging in, the limit rod acts upward on the transverse plug-in rod under the reaction force of the spring. At this time, the transverse plug-in rod is limited and locked, and at the same time, the two groups of transverse plug-in rods after plugging in are vertically connected at one end away from the fixed rod through the locking rod and the corresponding locking hole. The overall structure is reasonable, the operation is simple, and it is more conducive to promotion, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A subway tunnel contact network busbar joint, comprising a joint body for a subway tunnel contact network busbar, the joint body being slidably mounted between two adjacent sets of busbar bodies, the joint body and the two adjacent sets of busbar bodies being plugged in through a plurality of plug-in components, and a limiter being movably mounted in the joint body near any one of the plurality of plug-in components;

[0009] The joint body is used to connect two adjacent sets of busbar bodies;

[0010] The plug-in assembly is used to plug the connector body and the busbar body;

[0011] The limiter is used to lock and limit the plug-in assembly.

[0012] As a preferred solution of the present invention, connection positioning grooves are provided near the center on both sides of the connector body, and internal fixed sockets corresponding to multiple groups of plug-in components are provided on the upper and lower sides of the two sides of the connector body near the connection positioning grooves, and a limiter groove adapted to the limiter is provided inside the connector body.

[0013] As a preferred solution of the present invention, the limiter groove is composed of an upper short groove cavity and a lower long groove cavity, and the upper short groove cavity is located at the top of the lower long groove cavity, and a plurality of groups of annularly distributed limit guard grooves are opened around the inner wall of the lower long groove cavity, and the internal fixed socket passes through adjacent limit guard grooves.

[0014] As a preferred solution of the present invention, any one of the two adjacent groups of bus bodies is fixedly installed with a connection positioning seat near the center on both sides of the inner wall near one end of the connector body, and the connection positioning seat is penetrated by external fixed sockets compatible with the plug-in assembly on both upper and lower sides, and an operation window is opened on the top surface of any one of the two adjacent groups of bus bodies near the limiter.

[0015] As a preferred solution of the present invention, a conical plug is fixedly installed on one end of the connection positioning seat close to the joint body, and a vertically arranged anti-dislocation head is fixedly installed on one end of the connection positioning seat away from the joint body.

[0016] As a preferred solution of the present invention, any one of the multiple groups of plug-in components includes two groups of transverse plug-in rods, a vertical locking rod and a fixed rod, and the two groups of transverse plug-in rods are arranged in parallel, one end of the two groups of transverse plug-in rods are connected through the vertical locking rod, and the two groups of transverse plug-in rods are fixedly connected by a fixed rod at one end away from the vertical locking rod.

[0017] As a preferred solution of the present invention, the two groups of horizontal plug-in rods are penetrated by locking holes matched with the vertical locking rods near the vertical locking rods, and an anti-slip head is fixedly installed on the top of the vertical locking rods.

[0018] As a preferred solution of the present invention, the limiter includes a limit rod, a spring and a spring lower seat, the spring is located between the limit rod and the spring lower seat, and the spring lower seat is fixedly installed on the inner bottom surface of the lower long groove cavity.

[0019] As a preferred solution of the present invention, the limit rod is composed of an upper short rod body and a lower long rod body, the upper short rod body and the lower long rod body are integrally formed, and the upper short rod body and the lower long rod body are respectively located inside the upper short slot cavity and the lower long slot cavity.

[0020] As a preferred solution of the present invention, a plug-in hole is penetrated through the lower long rod body near the transverse plug-in rod, a limit slide bar adapted to the limit guard groove is fixedly installed on the outer surface of the lower long rod body, and the plug-in hole passes through the adjacent limit slide bar, and a spring upper seat is fixedly installed on the bottom end of the lower long rod body.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In the present invention, the connection and fixing structure of the existing busbar is improved by designing multiple groups of plug-in components and limiters, and a plug-in and limit fixing method is adopted, which effectively avoids the vibration of the contact and suspension parts during the operation of the subway, and this vibration is in an uninterrupted state. In addition, the subway operation train has a short time interval and a large traffic density, and the energy generated by the vibration is continuously superimposed. With the accumulation of operation time, the thread loosening and slipping fault problems will occur in the middle joint part where the connection is relatively weak, thereby improving the stability and reliability of the subway operation. The subway operation direction, plug-in direction, and limit direction correspond to the X, Z, and Y axes respectively, so that the connection between the two adjacent busbar bodies is more stable and reliable, thereby further improving the stability and reliability of the subway operation.

[0023] 2. In the present invention, a force is applied downward to the limit rod. Under the force, the limit rod compresses the spring, and the limit slide bar slides downward inside the limit protection groove until the plug-in hole is aligned with the inner fixed plug-in hole and the outer fixed plug-in hole, and the transverse plug-in rod is passed through the inner fixed plug-in hole and the outer fixed plug-in hole after the center of the circle is aligned, and the joint body and the bus body are plugged in. After the plug-in, the limit rod acts on the transverse plug-in rod upward under the reaction force of the spring. At this time, the transverse plug-in rod is limited and locked. At the same time, the two groups of transverse plug-in rods away from the end of the fixed rod after the plug-in are vertically connected through the locking rod and the corresponding locking hole. The overall structure is reasonable, the operation is simple, and it is more conducive to promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall external three-dimensional structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the overall disassembled three-dimensional structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the three-dimensional external structure of the joint body in the present invention;

[0027] Figure 4 It is a schematic diagram of the cross-sectional three-dimensional structure of the joint body in the present invention;

[0028] Figure 5 It is a schematic diagram of the large three-dimensional structure of confluence and discharge in the present invention;

[0029] Figure 6 It is a schematic diagram of the three-dimensional structure of the plug-in assembly in the present invention;

[0030] Figure 7 This is a schematic diagram of the disassembled three-dimensional structure of the limiter in the present invention;

[0031] Figure 8 It is a schematic diagram of an enlarged three-dimensional structure of the connection and positioning seat in the present invention.

[0032] In the figure: 1. connector body; 11. connection positioning groove; 12. internal fixing socket; 13. limiter groove; 131. upper short groove cavity; 132. lower long groove cavity; 133. limit slide; 2. bus body; 21. connection positioning seat; 211. conical plug; 212. anti-misalignment head; 22. external fixing socket; 23. operation window; 3. plug-in assembly; 31. horizontal plug-in rod; 311. locking hole; 32. vertical locking rod; 321. anti-slip head; 33. fixing rod; 4. limiter; 41. limit rod; 411. upper short rod body; 412. lower long rod body; 413. plug-in hole; 414. limit slide; 415. spring upper fixing seat; 42. spring; 43. spring lower fixing seat. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] Example:

[0035] See also Figure 1-Figure 8 , the present invention provides a technical solution:

[0036] A subway tunnel contact network busbar joint, comprising a joint body 1 for a subway tunnel contact network busbar, wherein the joint body 1 is slidably installed between two adjacent groups of busbar bodies 2, the joint body 1 and the two adjacent groups of busbar bodies 2 are plugged in through multiple groups of plug-in components 3, and a limiter 4 is movably installed inside the joint body 1 near any one of the multiple groups of plug-in components 3. The connection and fixing structure of the existing busbar is improved by designing the multiple groups of plug-in components 3 and the limiter 4, and the plug-in and limit fixing method is adopted to effectively avoid vibration of various parts of the contact suspension during the operation of the subway, and the vibration is in an uninterrupted state. In addition, the subway operation train has a short time interval and a large traffic density, and the energy generated by the vibration is continuously superimposed. With the accumulation of operation time, the thread loosening and slipping fault problem will occur in the middle joint part where the connection is relatively weak, thereby improving the stability and reliability of the subway operation, and the subway operation direction, the plug-in direction, and the limit direction correspond to the X, Z, and Y axes respectively, so that the connection between the two adjacent groups of busbar bodies 2 is more stable and reliable, thereby further improving the stability and reliability of the subway operation;

[0037] The joint body 1 is used to connect two adjacent sets of busbar bodies 2;

[0038] Further, both sides of the connector body 1 are provided with connection positioning grooves 11 near the center, and both sides of the connector body 1 near the connection positioning grooves 11 are penetrated with internal fixed sockets 12 corresponding to multiple groups of plug-in components 3, and the interior of the connector body 1 is provided with a limiter groove 13 adapted to the limiter 4, and any one of the two adjacent groups of busbar bodies 2 is fixedly installed with a connection positioning seat 21 near the center of the inner wall of one end of the connector body 1, and the upper and lower sides of the connection positioning seat 21 are penetrated with external fixed sockets 22 adapted to the plug-in component 3, and any one of the top surfaces of the two adjacent groups of busbar bodies 2 is near The stoppers 4 are all provided with operation windows 23. The connector body 1 is placed between two adjacent busbar bodies 2 of the connection positioning groove 11, and the connection positioning seat 21 is inserted into the connection positioning groove 11. At the same time, the two adjacent busbar bodies 2 are slid toward each other until they are connected, and the centers of the inner fixing socket 12 and the outer fixing socket 22 are aligned. The connector body 1 can be limited inside the busbar body 2 through the design of the connection positioning groove 11 and the connection positioning seat 21 to prevent slipping and deviation, which is more conducive to the orderly implementation of the subsequent plug-in limit. Secondly, the design of the operation window 23 facilitates the pressing of the stopper 4.

[0039] Furthermore, the stopper groove 13 is composed of an upper short groove cavity 131 and a lower long groove cavity 132, and the upper short groove cavity 131 is located at the top of the lower long groove cavity 132, and a plurality of groups of annularly distributed stopper grooves 133 are provided around the inner wall of the lower long groove cavity 132, and the inner fixed insertion hole 12 passes through the adjacent stopper grooves 133. The stopper 4 can be movably installed inside the stopper groove 13 through the design of the upper short groove cavity 131, the lower long groove cavity 132 and the stopper groove 133, and at the same time, the inner fixed insertion hole 12 passes through the adjacent stopper groove 133 to effectively prevent obstruction to the plugging process;

[0040] Furthermore, a conical plug 211 is fixedly installed at one end of the connection positioning seat 21 close to the connector body 1, and a vertically arranged anti-dislocation head 212 is fixedly installed at one end of the connection positioning seat 21 away from the connector body 1. The design of the conical plug 211 can make it easier for the connection positioning seat 21 to be inserted into the interior of the connection positioning groove 11. At the same time, the design of the anti-dislocation head 212 can effectively prevent the connector body 1 from slipping and dislocating, resulting in the center of the inner fixed socket 12 and the outer fixed socket 22 being unable to be aligned, which is more conducive to subsequent accurate plugging.

[0041] The plug-in assembly 3 is used to plug the connector body 1 and the busbar body 2;

[0042] Furthermore, any one of the multiple groups of plug-in assemblies 3 includes two groups of transverse plug-in rods 31, vertical locking rods 32 and fixed rods 33, and the two groups of transverse plug-in rods 31 are arranged in parallel, and one end of the two groups of transverse plug-in rods 31 is connected through the vertical locking rod 32, and the two groups of transverse plug-in rods 31 are fixedly connected through the fixed rod 33 at one end away from the vertical locking rod 32, and the transverse plug-in rod 31 is passed through the inner fixed plug hole 12 and the outer fixed plug hole 22 after the center of the circle is aligned, and the joint body 1 and the bus body 2 are plugged in. The design of the two groups of parallel transverse plug-in rods 31 and the vertical locking rods 32 and the fixed rods 33 can make the structure of any group of plug-in assemblies 3 more stable, which is beneficial to the stability after plugging in. At the same time, the joint body 1 and the two adjacent groups of bus bodies 2 can be doubly plugged and fixed to improve the fixing effect;

[0043] Furthermore, the two groups of transverse plug rods 31 are penetrated and opened near the vertical locking rod 32 to match them, and the top of the vertical locking rod 32 is fixedly installed with an anti-slip head 321. The design of the locking rod 32 and the matching locking hole 311 can vertically penetrate and connect the two groups of transverse plug rods 31 away from the fixed rod 33 after plugging, which can effectively prevent the plug assembly 3 from loosening, and the anti-slip head 321 can effectively ensure the stability of the locking rod 32.

[0044] The limiter 4 is used to lock and limit the plug-in assembly 3;

[0045] Furthermore, the limiter 4 includes a limit rod 41, a spring 42 and a spring lower fixing seat 43, the spring 42 is located between the limit rod 41 and the spring lower fixing seat 43, and the spring lower fixing seat 43 is fixedly installed on the inner bottom surface of the lower long groove cavity 132, and exerts a force downward on the limit rod 41. At this time, under its force, the limit rod 41 compresses the spring 42, and at the same time, the limit slide bar 414 slides downward inside the limit protection groove 133 until the plug hole 413 is aligned with the inner fixed plug hole 12 and the outer fixed plug hole 22. After plugging, the limit rod 41 acts upward on the transverse plug rod 31 under the reaction force of the spring 42, and the transverse plug rod 31 is locked by limit, and the overall limiter 4 has a simple structure and is economical and effective.

[0046] Furthermore, the limiting rod 41 is composed of an upper short rod body 411 and a lower long rod body 412, which are integrally formed, and the upper short rod body 411 and the lower long rod body 412 are respectively located inside the upper short groove cavity 131 and the lower long groove cavity 132, and a plug hole 413 is penetrated through the lower long rod body 412 near the transverse plug rod 31, and a limiting slide bar 414 adapted to the limiting groove 133 is fixedly installed on the outer surface of the lower long rod body 412, and the plug hole 413 passes through the adjacent limiting slide bar 414, and a spring upper fixed seat 415 is fixedly installed on the bottom end of the lower long rod body 412. The design of the limiting groove 133 and the matching limiting slide bar 414 can make the limiting rod 41 slide up and down more stably and reliably to prevent self-rotation, and on the other hand The limit rod 41 can be limited inside the limiter slot 13 to prevent it from automatically popping out. At the same time, a plurality of groups of annular limit protection grooves 133 are provided around the inner wall of the lower long slot cavity 132 to ensure that the upper short rod body 411 can enter the lower long slot cavity 132 to avoid obstruction during the pressing process of the limit rod 41. Secondly, the plug hole 413 passes through the adjacent limit slide 414 to further ensure smooth plugging. Finally, the spring 42 can be positioned by the combined design of the spring upper fixing seat 415 and the spring lower fixing seat 43. During installation, the upper fixing seat 415 and the spring lower fixing seat 43 can be respectively embedded in the upper and lower ends of the spring 42, thereby effectively preventing it from detaching during the telescopic expansion process, ensuring its telescopic stability, and thus facilitating the limit rod 41 to stably limit the transverse plug rod 31;

[0047] In this embodiment, the implementation scenario is specifically as follows: when making a subway tunnel contact network bus joint, the joint body 1 is placed between two adjacent bus bodies 2 in the connection positioning groove 11, and the conical plug 211 at one end of the connection positioning seat 21 is inserted into the interior of the connection positioning groove 11. The design of the conical plug 211 makes it easier for the connection positioning seat 21 to be inserted into the interior of the connection positioning groove 11, and at the same time, the two adjacent bus bodies 2 slide closer to each other until the two ends of the joint body 1 are connected to the two adjacent bus bodies. 2, the anti-dislocation head 212 inside can effectively prevent the connector body 1 from sliding and dislocating, resulting in the center of the inner fixing hole 12 and the outer fixing hole 22 being unable to align, which is more conducive to subsequent accurate plugging, and the center of the inner fixing hole 12 and the outer fixing hole 22 are aligned. Then, a tool is used to apply a force downward to the limit rod 41 inside the operation window 23. At this time, under the force, the limit rod 41 compresses the spring 42, and the limit slide bar 414 slides downward inside the limit protection groove 133 until the plug hole 413 is aligned with the outer fixing hole 22. The inner fixing socket 12 is aligned with the outer fixing socket 22, and the transverse plug rod 31 is passed through the inner fixing socket 12 and the outer fixing socket 22 after the center of the circle is aligned, and the joint body 1 is plugged into the bus body 2. After the plugging, the limit rod 41 acts upward on the transverse plug rod 31 under the reaction force of the spring 42. At this time, the transverse plug rod 31 is limited and locked. At the same time, the locking rod 32 passes through the matching locking hole 311, and the two sets of transverse plug rods 31 are vertically connected at the end away from the fixing rod 33 after the plugging. , which can effectively prevent the plug-in assembly 3 from loosening. Compared with the existing busbar connection fixing structure, the present invention adopts a plug-in and limit fixing method through the design of multiple groups of plug-in assemblies and limiters to improve the stability and reliability of subway operation. The subway running direction, plug-in direction, and limit direction correspond to the X, Z, and Y axes respectively, thereby further improving the stability and reliability of subway operation, avoiding the problem of thread loosening and slipping failure in the middle joint where the connection is relatively weak, thereby improving the stability and reliability of subway operation.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A subway tunnel contact network busbar joint, comprising a joint body (1) for a subway tunnel contact network busbar, characterized in that: The connector body (1) is slidably mounted between two adjacent groups of busbar bodies (2); the connector body (1) and the two adjacent groups of busbar bodies (2) are plugged in via a plurality of plug-in components (3); a limiter (4) is movably mounted inside the connector body (1) near any one of the plurality of plug-in components (3); The joint body (1) is used to connect two adjacent groups of busbar bodies (2); The plug-in assembly (3) is used to plug the connector body (1) and the busbar body (2); The limiter (4) is used to lock and limit the plug-in assembly (3).

2. A subway tunnel overhead contact busbar joint according to claim 1, characterized in that: Both sides of the connector body (1) are provided with connection positioning grooves (11) near the center, and both sides of the connector body (1) near the connection positioning grooves (11) are provided with internal fixing holes (12) corresponding to the plurality of plug-in components (3), and the connector body (1) is provided with a stopper groove (13) adapted to the stopper (4) inside.

3. A subway tunnel overhead contact busbar joint according to claim 2, characterized in that: The stopper groove (13) is composed of an upper short groove cavity (131) and a lower long groove cavity (132), and the upper short groove cavity (131) is located at the top of the lower long groove cavity (132). The inner wall of the lower long groove cavity (132) is provided with a plurality of groups of ring-shaped limit protection grooves (133), and the internal fixing insertion hole (12) passes through adjacent limit protection grooves (133).

4. The subway tunnel overhead contact busbar joint according to claim 1, characterized in that: A connection positioning seat (21) is fixedly installed near the center of both sides of the inner wall of one end of the connector body (1) of any one of the two adjacent groups of busbar bodies (2), and external fixing holes (22) compatible with the plug-in assembly (3) are penetrated through the upper and lower sides of the connection positioning seat (21), and an operation window (23) is opened on the top surface of any one of the two adjacent groups of busbar bodies (2) near the limiter (4).

5. The subway tunnel overhead contact busbar joint according to claim 4, characterized in that: A conical plug (211) is fixedly mounted on one end of the connection positioning seat (21) close to the joint body (1), and a vertically arranged anti-dislocation head (212) is fixedly mounted on one end of the connection positioning seat (21) away from the joint body (1).

6. The subway tunnel overhead contact busbar joint according to claim 1, characterized in that: Any one of the plurality of plug-in assemblies (3) comprises two groups of transverse plug-in rods (31), a vertical locking rod (32) and a fixing rod (33), and the two groups of transverse plug-in rods (31) are arranged in parallel, one end of the two groups of transverse plug-in rods (31) is connected through the vertical locking rod (32), and the two groups of transverse plug-in rods (31) are fixedly connected at one end away from the vertical locking rod (32) by the fixing rod (33).

7. A subway tunnel overhead contact busbar joint according to claim 6, characterized in that: The two groups of transverse plug-in rods (31) are both provided with locking holes (311) matching the vertical locking rods (32) at locations close to the vertical locking rods (32), and an anti-slip head (321) is fixedly mounted on the top of the vertical locking rods (32).

8. The subway tunnel overhead contact busbar joint according to claim 1, characterized in that: The limiter (4) comprises a limit rod (41), a spring (42) and a spring lower fixing seat (43); the spring (42) is located between the limit rod (41) and the spring lower fixing seat (43); and the spring lower fixing seat (43) is fixedly mounted on the inner bottom surface of the lower long groove cavity (132).

9. The subway tunnel overhead contact busbar joint according to claim 8, characterized in that: The limiting rod (41) is composed of an upper short rod body (411) and a lower long rod body (412); the upper short rod body (411) and the lower long rod body (412) are integrally formed, and the upper short rod body (411) and the lower long rod body (412) are respectively located inside the upper short slot cavity (131) and the lower long slot cavity (132).

10. A subway tunnel overhead contact busbar joint according to claim 9, characterized in that: A plug hole (413) is provided through the lower long rod body (412) near the transverse plug rod (31); a limit slide bar (414) adapted to the limit protection groove (133) is fixedly installed on the outer surface of the lower long rod body (412); and the plug hole (413) passes through the adjacent limit slide bar (414); and a spring upper fixing seat (415) is fixedly installed at the bottom end of the lower long rod body (412).

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