A welded rail electrical connection device

Abstract

The present invention discloses a welding type rail electrical connection device, comprising a wiring connection part combined with a rail, the wiring connection part comprising a base, an oil pipe, a positioning foot, a transfer foot and a connecting foot, the oil pipe is fixedly arranged above the base and is U-shaped, two coaxial and symmetrically distributed wiring pistons are arranged on the top of the oil pipe, the action ends of the two wiring pistons are respectively fixedly connected to the connecting foot, the opposite sides of the two vertical pipes on the oil pipe are connected with a positioning piston, the action end of the positioning piston faces downward and is tightly connected to the positioning foot, and the diverging sides of the two vertical pipes on the oil pipe are fixedly connected with a transfer piston with an action end facing downward. In the present invention, by arranging the oil pipe, the positioning piston, the wiring piston, the transfer piston, the wiring pad, the wiring compression sleeve and the hollow sealing rubber sleeve, the connection between the device and the rail is more reliable, the electrical connection is more reliable, and the moisture-proof and heat-dissipating properties are better.

Description

Technical Field

[0001] The invention relates to the technical field of subway track electrical connection, and in particular to a welded rail electrical connection device. Background Art

[0002] The electricity required for subway operation is provided by the outside world. Using steel rails to supply power to the subway is one of the many power supply methods. Using steel rails to supply power involves electrical connection, that is, connecting the wires and the rails. The structure connecting the rails and the wires is usually an electrical connection device. The quality of the connection device will directly affect the driving safety of the subway.

[0003] At present, the function of common connection devices is to dock with the rails and then transfer the wires. The main way of electrical connection is to connect the transferred wires and rails by welding, laminating welding, riveting or threading. Welding, laminating welding, riveting and threading have one thing in common: they will damage the rails. For example, welding and laminating welding will damage the internal material of the rails. Riveting and threading require drilling holes in the rails, which reduces the strength of the rails. Damaged rails are likely to endanger the safety of subway operations. Moreover, the connection device that transfers the electrical lines is usually clamped at the bottom and waist of the rails through a bolt structure. During actual operation, the tightening degree of each bolt connection is uneven, and the vibration of the rails can easily accelerate the loosening of the bolts, causing the connection device to fall faster, which in turn affects the reliability of the electrical line connection transfer.

[0004] To this end, the present invention provides a welded rail electrical connection device. Summary of the invention

[0005] The purpose of the present invention is to propose a welded rail electrical connection device to solve the problem that the existing wire and rail connection method mentioned in the background technology is easy to damage the rail, and the connection device connected by bolts and rails is easy to accelerate the detachment due to vibration.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A welded rail electrical connection device comprises a wiring connection part combined with a rail, the wiring connection part comprises a base, an oil pipe, a positioning foot, a transfer foot and a connecting foot, the oil pipe is fixedly arranged above the base and is U-shaped, two coaxial and symmetrically distributed wiring pistons are arranged on the top of the oil pipe, the action ends of the two wiring pistons are respectively fixedly connected to the connecting foot, the opposite sides of the two vertical pipes on the oil pipe are connected with a positioning piston, the action end of the positioning piston faces downward and is tightly connected to the positioning foot, the diverging sides of the two vertical pipes on the oil pipe are fixedly connected with a transfer piston with an action end facing downward, the action end of the transfer piston is fixedly connected to the transfer foot, and the bottom of the oil pipe is provided with an anti-loosening drive mechanism that controls the extension of the wiring piston, the positioning piston and the transfer piston through oil.

[0008] As a further description of the above technical solution:

[0009] The wiring piston includes a piston tube and a piston rod with one end sleeved in the piston tube; the working surface of the connecting presser foot is slidably connected to a wiring pad; one side of the wiring pad is fixedly connected to a wiring plunger rod that passes through the piston rod and one end extends into the piston tube; one side of the connecting presser foot is fixedly connected to a wiring pressing sleeve; the wiring pad is located in the wiring pressing sleeve, and a wiring notch is opened at the opening of the wiring pressing sleeve.

[0010] As a further description of the above technical solution:

[0011] The back side of the wiring pad is fixedly connected with a plurality of heat dissipation piles with gaps penetrating the connection presser feet, and the plurality of heat dissipation piles are evenly distributed in the circumferential direction relative to the wiring plunger rod.

[0012] As a further description of the above technical solution:

[0013] The inner peripheral wall of the wiring crimping sleeve is provided with a hollow sealing rubber sleeve.

[0014] As a further description of the above technical solution:

[0015] The top of the base is fixedly connected with brackets close to the two ends and opposite to the transfer presser feet.

[0016] As a further description of the above technical solution:

[0017] The anti-loosening driving mechanism includes an extrusion piston disc and a driving group. A rectangular clearance gap is opened through the cross tube at the bottom of the oil pipe. The driving group is connected to the middle of the cross tube. There are two extrusion piston discs and they are located on both sides of the driving group. The extrusion piston disc is sleeved in the cross tube. The driving group is used to control the synchronous opposite and reverse movements of the two extrusion pistons.

[0018] As a further description of the above technical solution:

[0019] The driving group includes a two-way telescopic rod, a screw rod, a connecting rod and a driving block. The fixed sleeve on the two-way telescopic rod is fixedly arranged in a horizontal tube at the bottom of the oil pipe. The action rods at both ends of the two-way telescopic rod are respectively fixedly connected to adjacent extrusion piston disks. The screw rod passes through the middle part of the outer wall of the horizontal tube on the two-way telescopic rod and is rotatably connected. The screw rod is screwed with a driving block located on both sides of the horizontal tube. The two ends of the driving block are respectively hingedly connected by the connecting rod and the action rods at both ends of the two-way telescopic rod.

[0020] As a further description of the above technical solution:

[0021] The free end of the action rod on the bidirectional telescopic rod is fixedly connected with a pressure beam, and the two ends of the pressure beam are respectively hingedly connected to adjacent connecting rods.

[0022] As a further description of the above technical solution:

[0023] A bypass pipe is fixedly connected to the outer peripheral wall of the horizontal pipe at the bottom of the oil pipe, and the bypass pipe is connected to the two vertical pipes on the oil pipe.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0025] 1. In the present invention, by arranging the oil pipe, the positioning piston and the transfer piston, the oil pipe and the track are hydraulically fastened, and the oil pressure in the entire oil pipe is equal everywhere, and the extrusion force on the track, the conductor and the soft wire row is balanced, so it has the advantages of better vibration resistance and anti-falling, and greatly improves the reliability of the connection between the device and the track.

[0026] 2. In the present invention, a connecting presser foot is provided, and the connecting presser foot is connected to the wiring piston, so that the device can press the soft wire row and the track when the device and the track are pressed by oil pressure. This electrical connection structure will not damage the track and will not bring hidden dangers to driving safety.

[0027] 3. In the present invention, a wiring sleeve is arranged on the connecting pressure foot, and then a wiring pad and a hollow sealing rubber sleeve are arranged in the wiring sleeve, wherein the wiring sleeve has a heat dissipation function, and the hollow sealing rubber sleeve has a sealing function. This arrangement enables the wiring terminal crimped with the track to have better moisture-proof and heat dissipation functions, making the electrical connection more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural schematic diagram of a welded rail electrical connection device proposed by the present invention;

[0029] Figure 2 for Figure 1 The main view;

[0030] Figure 3A schematic diagram of the structure of an anti-loosening drive mechanism of a welded rail electrical connection device proposed by the present invention;

[0031] Figure 4 A schematic structural diagram of a bidirectional telescopic rod and an extrusion piston disc connected to a welded rail electrical connection device proposed by the present invention;

[0032] Figure 5 This is a schematic diagram of the structure of the two driving blocks of the welded rail electrical connection device proposed by the present invention after being close to the bidirectional telescopic rod;

[0033] Figure 6 The present invention is a schematic structural diagram of a hollow sealing rubber sleeve, a connecting foot and a wiring pad after explosion and expansion of a welded rail electrical connection device proposed by the present invention.

[0034] Legend:

[0035] 1. Track; 2. Connecting part; 21. Base; 22. Oil pipe; 221. Wiring piston; 2211. Piston tube; 2212. Piston rod; 222. Positioning piston; 223. Transfer piston; 224. Anti-loosening driving mechanism; 2241. Extrusion piston plate; 2242. Driving group; 22421. Two-way telescopic rod; 224211. Pressure beam; 22422. Screw rod; 22423. Connecting rod; 22424. Driving block; 225. Rectangular clearance gap; 226. Bypass pipe; 23. Positioning presser foot; 24. Transfer presser foot; 25. Connecting presser foot; 251. Wiring pad; 2511. Wiring plunger rod; 2512. Heat dissipation pile; 252. Wiring pressing sleeve; 2521. Hollow sealing rubber sleeve; 2522. Wiring gap. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0037] See also Figure 1-5 A welded rail electrical connection device includes a wiring connection part 2 combined with a track 1. The wiring connection part 2 and the track 1 are fastened together using oil pressure, and have good shock resistance and higher reliability in preventing falling off. The wiring connection part 2 connects the soft wire row to the side wall of the track 1 using oil pressure, that is, crimping, which will not damage the track 1.

[0038] The specific structure of the wiring connection part 2 includes a base 21, an oil pipe 22, a positioning presser foot 23, a transfer presser foot 24 and a connecting presser foot 25, wherein hydraulic oil flows through the oil pipe 22, and the oil pipe 22 is fixedly arranged above the base 21 and is U-shaped. When in use, the base 21 is buckled into the oil pipe 22 from the bottom of the track 1, that is, a part of the track 1 passes through the U-shaped inner cavity of the oil pipe 22.

[0039] Two coaxial and symmetrically distributed wiring pistons 221 are arranged on the top of the oil pipe 22, and the action ends of the two wiring pistons 221 are respectively fixedly connected to the connecting pressure feet 25, and the connecting pressure feet 25 are opposite to the side walls of the web on the track 1, wherein the inner cavity of the wiring piston 221 is connected with the inner cavity of the oil pipe 22, when the oil pressure in the oil pipe 22 increases, the wiring piston 221 is pushed, and the connecting pressure feet 25 will squeeze the side walls of the web. It should be noted that when the soft wire row is placed between the connecting pressure feet 25 and the web, the soft wire row will be tightly crimped with the web to realize the electrical connection between the soft wire row and the track 1.

[0040] The opposite sides of the two vertical pipes on the oil pipe 22 are connected with a positioning piston 222, the action end of the positioning piston 222 faces downward and is tightly connected to the positioning foot 23. When in use, the positioning foot 23 is opposite to the upper inclined surface of the lower wing plate of the track 1, wherein the positioning piston 222 is connected to the inner cavity of the oil pipe 22. When the oil pressure in the oil pipe 22 increases, the positioning piston 222 pushes, and the positioning foot 23 is pressed on the inner inclined surface of the lower wing plate, and the cross pipe on the oil pipe 22 is against the track 1, at this time, the entire oil pipe 22 is tightly connected to the track 1. A reinforcing plate can be welded between the base 21 and the oil pipe 22, and the ability of the oil pipe 22 to resist deformation can be improved by the reinforcing plate. In this embodiment, two legs can be welded on the top of the cross pipe on the oil pipe 22, and the legs replace the cross pipe and are against the bottom of the track 1 when in use.

[0041] A transfer piston 223 with an action end facing downward is fixedly connected to the opposite side of the two vertical pipes on the oil pipe 22. Specifically, the top of the transfer piston 223 is connected and communicated with the oil pipe 22 through a bend pipe. The action end of the transfer piston 223 is fixedly connected to the transfer presser foot 24. The transfer presser foot 24 is opposite to the upper end of the base 21. When the oil pressure in the oil pipe 22 increases, the transfer presser foot 24 will move toward the base 21, and finally squeeze the base 21. The transfer presser foot 24 and the base 21 are connected. 1, the wires and the soft wire row are placed between them, the wires and the soft wire row are stacked, and when the transfer presser foot 24 squeezes the base 21, the soft wire row and are fastened to the base 21. Preferably, the top of the base 21 is fixedly connected with a bracket close to both ends and opposite to the transfer presser foot 24, and the bracket is a groove-type structure. The terminal parts of the wires and the soft wire row can be stacked in the bracket, and the transfer presser foot 24 extends into the bracket and squeezes the connection terminals of the soft wire row and the wire. This arrangement can increase the contact area between the soft wire row and the wire.

[0042] In summary, the connection device and the flexible cable row are connected to the track 1 by means of hydraulic extrusion.

[0043] An anti-loosening drive mechanism 224 is provided at the bottom of the oil pipe 22 , which extends out through the oil control wiring piston 221 , the positioning piston 222 and the transfer piston 223 . In other words, the function of the anti-loosening drive mechanism 224 is to adjust the oil pressure in the oil pipe 22 .

[0044] Specifically, the anti-loosening drive mechanism 224 includes a squeeze piston disc 2241 and a drive group 2242. A rectangular clearance notch 225 is provided on the transverse tube at the bottom of the oil pipe 22. The rectangular clearance notch 225 is located in the middle of the transverse tube. The drive group 2242 is connected to the middle of the transverse tube. There are two squeeze piston discs 2241 located on both sides of the drive group 2242. The squeeze piston disc 2241 is sleeved in the transverse tube, which means that when the squeeze piston disc 2241 slides in the transverse tube, it will push the hydraulic oil in the transverse tube to flow, thereby controlling the hydraulic oil pressure in the oil pipe 22. The drive group 2242 is used to control the synchronous opposite and reverse movements of the two squeeze pistons.

[0045] The driving group 2242 includes a two-way telescopic rod 22421, a screw rod 22422, a connecting rod 22423 and a driving block 22424. The two-way telescopic rod 22421 is a telescopic structure in which an action rod is sleeved at both ends of a fixed sleeve. The fixed sleeve on the two-way telescopic rod 22421 is fixedly arranged in a horizontal tube at the bottom of the oil pipe 22. The action rods at both ends of the two-way telescopic rod 22421 are respectively fixedly connected to the adjacent extrusion piston disc 2241. The screw rod 22422 penetrates the middle part of the outer wall of the upper horizontal tube of the two-way telescopic rod 22421 and is rotatably connected. The screw rod 22422 and the track 1 is parallel to the screw rod 22422, and the screw rod 22422 is provided with a driving block 22424 on both sides of the transverse tube. When the screw rod 22422 rotates, the driving blocks 22424 on both sides of the transverse tube will move in opposite and opposite directions synchronously. The two ends of the driving block 22424 are respectively hingedly connected by the connecting rod 22423 and the action rods at both ends of the two-way telescopic rod 22421. When the driving block 22424 moves along the axial direction of the screw rod 22422, it will drive the action rods at both ends of the two-way telescopic rod 22421 to expand and contract synchronously through the connecting rod 22423, thereby realizing the control of the movement of the extrusion piston disc 2241. When the device is tightly connected to the track 1, the hydraulic oil pressure in the two vertical pipes on the oil pipe 22 is equal or approximately equal, and the oil pressure in the two vertical pipes is equal to the oil pressure in the adjacent wiring piston 221, the positioning piston 222 and the transfer piston 223. Therefore, the connection between the flexible wire disc and the wire and the track 1 is more reliable, and the connection between the oil pipe 22 and the track 1 is more reliable.

[0046] Furthermore, the free end of the action rod on the two-way telescopic rod 22421 is fixedly connected to the pressure beam 224211, wherein a traction rod is welded on the outside of the extrusion piston disk 2241, the traction rod and the pressure beam 224211 are fixedly connected, and the two ends of the pressure beam 224211 are respectively hingedly connected to the adjacent connecting rod 22423. When the two driving blocks 22424 move to the extreme positions in opposite directions, the maximum distance between the two is smaller than the length of the pressure beam 224211. The purpose of this arrangement is to facilitate the connecting rod 22423 to form a self-locking structure, and this self-locking structure can effectively avoid the problem of loosening of the screw rod 22422.

[0047] In this embodiment, a bypass pipe 226 is fixedly connected to the outer peripheral wall of the horizontal pipe at the bottom of the oil pipe 22. The bypass pipe 226 connects the two vertical pipes on the oil pipe 22. By setting the bypass pipe 226, the oil pressure in the oil pipe 22 is kept equal everywhere. When the device is tightly connected to the track 1, the extrusion force on the track 1 is more uniform.

[0048] In this embodiment, the wiring piston 221 includes a piston tube 2211 and a piston rod 2212 with one end sleeved in the piston tube 2211. The working surface of the connecting presser foot 25 is slidably connected with a wiring pad 251. One side of the wiring pad 251 is fixedly connected with a wiring plunger rod 2511 that passes through the piston rod 2212 and extends into the piston tube 2211 at one end. That is to say, a coaxial slideway is provided in the piston rod 2212, and the wiring plunger rod 2511 is sleeved in the slideway. One side of the connecting presser foot 25 is fixedly connected with a wiring compression sleeve 252, and the mouth of the wiring compression sleeve 252 is provided with a The wiring gap 2522 is convenient for the flexible wire row to pass through. The wiring pad 251 is located in the wiring compression sleeve 252. When the oil pressure in the oil pipe 22 increases, the piston rod 2212 will move outward and drive the wiring compression sleeve 252 to squeeze the side wall of the web of the track 1. The wiring plunger rod 2511 is pushed by the oil pressure to drive the wiring pad 251 to squeeze the terminal on the flexible wire row. The wiring compression sleeve 252 is protected on the outside of the flexible wire row terminal. The purpose is to increase the area of ​​the flexible wire row terminal being squeezed, thereby increasing the contact area between the flexible wire row terminal and the web of the track 1, which has the advantage of reducing the heat generated at the wiring point. Example

[0049] See also Figure 2 and Figure 6, which is different from Example 1 in that a plurality of heat dissipation posts 2512 with gaps penetrating the connection foot 25 are fixedly connected on the back of the wiring pad 251, and the plurality of heat dissipation posts 2512 are evenly distributed circumferentially relative to the wiring plunger rod 2511. The wiring pad 251 and the heat dissipation posts 2512 are both made of materials with good heat dissipation properties, and the purpose is to conduct the heat generated by the flexible wire row terminal in contact with the track 1 outward, improve the heat dissipation effect, and avoid high-temperature oxidation to reduce the conductivity. Among them, a hollow sealing rubber sleeve 2521 is provided on the inner peripheral wall of the wiring compression sleeve 252, and the hollow structure in the hollow sealing rubber sleeve 2521 is easy to deform, that is, when the wiring compression sleeve 252 squeezes the web, the hollow sealing rubber sleeve 2521 is in a state of extrusion deformation, and the deformed hollow sealing rubber sleeve 2521 is in a state of completely wrapping the wiring terminal at one end of the flexible wire row, so that the wiring terminal has the advantages of moisture-proof and rust-proof.

[0050] Working principle: Before connection, ensure that the wiring piston 221, the positioning piston 222 and the transfer piston 223 are in the retracted state, then lift the base 21 upward from the bottom of the track 1, buckle the oil pipe 22 on the bottom of the track 1 by means of lateral dislocation, then prepare the wires and the soft wire row, stack the terminals at one end of the wires and the soft wire row on the bracket, and then place the terminals at the other end of the soft wire row in the wiring sleeve 252, at this time, use the electric trigger to screw the outer hexagon at one end of the screw rod 22422, and the screw rod 22422 rotates. When the screw rod 22422 rotates, it can drive the two drive blocks 22424 to move in opposite directions, and the drive blocks 22424 that move in opposite directions are connected The rod 22423 drives the two pressure beams 224211 to move in the opposite direction, pushing the extrusion piston plate 2241 to squeeze the hydraulic oil in the two vertical pipes of the oil pipe 22. At this time, the wiring piston 221, the positioning piston 222 and the transfer piston 223 extend under the action of oil pressure, the positioning presser foot 23 squeezes the lower wing plate of the track 1, the transfer presser foot 24 squeezes the stacked terminals of the wire and the dyeing line row, the wiring pressure sleeve 252 on the connecting presser foot 25 squeezes the web on the track 1, and the wiring plunger rod 2511 and the electric wiring pad 251 squeeze the terminal at the other end of the soft wire row on the web of the track 1. At this time, the wire, the soft wire row and the right tube are all connected to the track 1 under the action of oil pressure. The four connecting rods 22423 form an X shape, and under the action of oil pressure, the two driving blocks 22424 will squeeze the screw rod 22422 in the opposite direction, which has the effect of anti-vibration and anti-loosening.

[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A welded rail electrical connection device, comprising a wiring connection portion (2) combined with a rail (1), characterized in that: The wiring connection part (2) comprises a base (21), an oil pipe (22), a positioning presser foot (23), a transfer presser foot (24) and a connecting presser foot (25); the oil pipe (22) is fixedly arranged above the base (21) and is U-shaped; two coaxial and symmetrically distributed wiring pistons (221) are arranged on the top of the oil pipe (22); the action ends of the two wiring pistons (221) are respectively fixedly connected to the connecting presser foot (25); the opposite sides of the two vertical pipes on the oil pipe (22) are connected to the positioning presser foot (23); the transfer presser foot (24) is connected to the connecting presser foot (25); and the connecting presser foot (25) is connected to the connecting presser foot (25). A piston (222), the action end of the positioning piston (222) facing downward and being tightly connected to the positioning pressure foot (23), a transfer piston (223) with an action end facing downward being fixedly connected to the two vertical pipes on the oil pipe (22), the action end of the transfer piston (223) being fixedly connected to the transfer pressure foot (24), and an anti-loosening drive mechanism (224) extending through oil control of the wiring piston (221), the positioning piston (222) and the transfer piston (223).

2. A welded rail electrical connection device according to claim 1, characterized in that: The wiring piston (221) comprises a piston tube (2211) and a piston rod (2212) with one end sleeved in the piston tube (2211); a working surface of the connecting presser foot (25) is slidably connected to a wiring pad (251); one side of the wiring pad (251) is fixedly connected to a wiring plunger rod (2511) that passes through the piston rod (2212) and has one end extending into the piston tube (2211); one side of the connecting presser foot (25) is fixedly connected to a wiring compression sleeve (252); the wiring pad (251) is located in the wiring compression sleeve (252); and a wiring notch (2522) is provided at the mouth of the wiring compression sleeve (252).

3. A welded rail electrical connection device according to claim 2, characterized in that: The back side of the wiring pad (251) is fixedly connected with a plurality of heat dissipation piles (2512) which are arranged at intervals and penetrate the connecting presser foot (25), and the plurality of heat dissipation piles (2512) are evenly distributed in the circumferential direction relative to the wiring plunger rod (2511).

4. A welded rail electrical connection device according to claim 3, characterized in that: The inner peripheral wall of the wiring compression sleeve (252) is provided with a hollow sealing rubber sleeve (2521).

5. A welded rail electrical connection device according to claim 1, characterized in that: The top of the base (21) is fixedly connected to a bracket close to two ends of the base (21) and opposite to the transfer presser foot (24).

6. A welded rail electrical connection device according to claim 1, characterized in that: The anti-loosening drive mechanism (224) comprises an extrusion piston disc (2241) and a drive group (2242); a rectangular clearance notch (225) is provided through the transverse tube at the bottom of the oil pipe (22); the drive group (2242) is connected to the middle of the transverse tube; there are two extrusion piston discs (2241) located on both sides of the drive group (2242); the extrusion piston discs (2241) are sleeved in the transverse tube; and the drive group (2242) is used to control the synchronous opposite and reverse movements of the two extrusion piston discs (2241).

7. A welded rail electrical connection device according to claim 6, characterized in that: The driving group (2242) comprises a bidirectional telescopic rod (22421), a screw rod (22422), a connecting rod (22423) and a driving block (22424); the fixed sleeve on the bidirectional telescopic rod (22421) is fixedly arranged in a transverse tube at the bottom of the oil pipe (22); the action rods at both ends of the bidirectional telescopic rod (22421) are respectively fixedly connected to adjacent extrusion piston discs (2241); the screw rod (22422) passes through the middle of the outer wall of the transverse tube on the bidirectional telescopic rod (22421) and is rotatably connected; the screw rod (22422) is provided with a driving block (22424) located on both sides of the transverse tube; and the two ends of the driving block (22424) are respectively hingedly connected through the connecting rod (22423) and the action rods at both ends of the bidirectional telescopic rod (22421).

8. A welded rail electrical connection device according to claim 7, characterized in that: The free end of the action rod on the bidirectional telescopic rod (22421) is fixedly connected to a pressure beam (224211), and both ends of the pressure beam (224211) are respectively hingedly connected to adjacent connecting rods (22423).

9. A welded rail electrical connection device according to claim 7, characterized in that: A bypass pipe (226) is fixedly connected to the outer peripheral wall of the horizontal pipe at the bottom of the oil pipe (22), and the bypass pipe (226) is connected to two vertical pipes on the oil pipe (22).

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