Long steel rail welding device and welding method thereof

Abstract

The invention provides a long steel rail welding device and a welding method thereof.The long steel rail welding device comprises a movable seat and a fixed seat, the movable seat is slidably connected to the fixed seat in an inserted mode, a linear driving assembly is arranged between the movable seat and the fixed seat, and the linear driving assembly is used for driving the movable seat to move; the movable base and the fixed base are each provided with a clamping cavity, and clamping assemblies are arranged in the clamping cavities and comprise the first clamping assembly, the second clamping assembly and the third clamping assembly. A second clamping assembly; and a third clamping assembly. According to the steel rail multi-point clamping device, the first clamping piece assembly, the second clamping assembly and the third clamping assembly clamp and position the first position, the second position and the third position of a steel rail correspondingly, multi-point clamping is conducted according to the shape characteristics of the steel rail, and clamping stability can be maintained; conditions are provided for keeping the relative position between the fixed seat or the movable seat and the steel rail stable in the upsetting process, and then the acting force generated in the upsetting process is resisted.

Description

Technical Field

[0001] The invention belongs to the field of long rail welding devices, and in particular relates to a long rail welding device and a welding method thereof. Background Art

[0002] Long rail welding device technology is used to flash weld long rails. During the flash welding process, top forging is required. The main purpose of top forging in flash welding is to close the end face gap and the crater, eliminate oxides, inclusions and liquid metal, make the combined metals in close contact, and produce certain plastic deformation to promote the recrystallization process of the weld. During the top forging process, the two rails need to be fixed by a fixed seat and a movable seat, and then the movable seat drives one of the rails to move, so that the welding end of one rail is driven to top forge with the welding end of the other rail to achieve the top forging work. However, during the top forging process, the force generated by the top forging between the rails will have a huge impact on the clamping claws inside the movable seat and the fixed seat. The clamping claws inside the movable seat and the fixed seat have a single clamping point with the surface of the rail, which is not conducive to resisting the force between the rails. Summary of the invention

[0003] In view of this, the present invention aims to propose a long rail welding device and a welding method thereof, so as to solve the technical problem that during the upsetting process, the force generated by the upsetting between the rails will have a huge impact on the clamping claws inside the movable seat and the fixed seat, and the clamping claws inside the movable seat and the fixed seat both have a single clamping point with the surface of the rail, which is not conducive to counteracting the force between the upsetting of the rails.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows: In a first aspect, a long rail welding device is provided, comprising a movable seat and a fixed seat, wherein the movable seat is slidably inserted into the fixed seat, a linear drive assembly is arranged between the movable seat and the fixed seat, and the linear drive assembly is used to drive the movable seat to move, the movable seat and the fixed seat both have a clamping cavity, and the clamping cavity has a clamping assembly, and the clamping assembly comprises: a first clamping assembly, wherein the first clamping assembly is used to clamp two first positions of the rail; a second clamping assembly, wherein the second clamping assembly is used to clamp the second position of the rail; and a third clamping assembly, wherein the third clamping assembly is used to clamp the third position of the rail.

[0005] Further, the first clamping assembly includes two sockets and two first cylinders, the two sockets are fixedly connected to the two sides of the inner wall of the clamping cavity, the first clamping pieces are slidably inserted in the two sockets, and the end of the first clamping piece contacts the first position of the rail; The two first cylinders are fixedly connected to both sides of the movable seat or the fixed seat, the piston rods of the two first cylinders pass through the movable seat or the fixed seat and extend to the inside of the socket, and the ends of the piston rods of the two first cylinders are fixedly connected to the two first clamping members respectively.

[0006] Furthermore, the second clamping assembly includes a driving cavity, which is opened inside the first clamping piece. A first connecting groove is opened at the top of the driving cavity. A second clamping piece is slidably arranged in the first connecting groove. The top of the second clamping piece contacts the second position of the rail. A pushing assembly is arranged inside the driving cavity. The pushing assembly includes a second cylinder. A pushing block is fixedly connected to the end of the piston rod of the second cylinder. During the clamping process, the pushing block is pushed by the second cylinder to press against the second clamping piece, so that the second clamping piece clamps the second position of the rail.

[0007] Furthermore, the third clamping assembly includes a second connecting through groove, which is opened at the inner bottom end of the driving cavity, and a third clamping member is slidably arranged in the second connecting through groove, and the bottom end of the third clamping member is in contact with the third position of the rail. During the clamping process, the second cylinder pushes the pushing block to press against the third clamping member, so that the second clamping member clamps the third position of the rail.

[0008] Furthermore, an elastic support member is arranged between the second clamping member and the third clamping member and the surface of the first clamping member, and the elastic support member includes a socket, which is fixedly connected to the top or bottom surface of the first clamping member, and the socket is slidably plugged into the second clamping member or the third clamping member, and an elastic support member is fixedly connected between the socket and the second clamping member or the third clamping member.

[0009] Furthermore, a connecting cavity is provided at the end of the first clamping member, a positioning seat is fixedly connected to the interior of the connecting cavity, a plurality of flip blocks are rotatably connected in the positioning seat, the plurality of flip blocks each include a first end and a second end, a wedge-shaped rubber block is fixedly connected to the first end of the flip block, a pushing rod is contacted at the second end of the flip block, the plurality of pushing rods each extend to the interior of the driving cavity after passing through the positioning seat, a linkage plate is fixedly connected to one end of the plurality of pushing rods located in the driving cavity, and during the clamping process, the pushing block will push the linkage plate under the push of the second cylinder.

[0010] Furthermore, the positioning seat is fixedly connected with a plurality of limit seats corresponding to the plurality of flip blocks one by one, and the plurality of limit seats have limit ends, and an elastic pad is fixedly connected between the limit ends of the limit seats and the second ends of the flip blocks at corresponding positions.

[0011] Furthermore, the pushing block includes a first pushing surface, a second pushing surface and a third pushing surface, and the first pushing surface, the second pushing surface and the third pushing surface are used to press against the first clamping member, the second clamping member and the linkage plate respectively during the clamping process.

[0012] Furthermore, the linear drive assembly includes a third cylinder, the third cylinder is fixedly mounted on the surface of the fixed seat, and the end of the piston rod of the third cylinder is fixedly connected to the movable seat.

[0013] In a second aspect, a welding method is provided, comprising the following steps: Step 1: Installation: Use an external lifting vehicle to place the movable seat and the fixed seat on two rails respectively; Step 2, clamping processing: clamping the first position of the rail by the first clamping assembly, clamping the second position of the rail by the second clamping assembly, and clamping the third position of the rail by the third clamping assembly, thereby realizing multi-point clamping; Step three, top forging treatment, the movable seat is driven to move by the linear drive assembly, and the movable seat drives one of the rails to move through the clamping assembly, so that the welding end of the rail on the movable seat and the end of the rail on the fixed seat are pressed against each other to achieve top forging treatment.

[0014] Compared with the prior art, the long rail welding device and the welding method thereof described in the present invention have the following beneficial effects: In the clamping process described in the present invention, after the first clamping member completes clamping the first position of the rail, the second cylinder drives the pushing block to press against the second clamping member while pressing against the third clamping member, and the bottom end of the third clamping member presses against the third position of the rail, thereby achieving the clamping positioning of the first position, the second position and the third position of the rail respectively by the first clamping member, the second clamping member and the third clamping member, thereby achieving multi-point clamping according to the shape characteristics of the rail, which is conducive to maintaining the stability of the clamping, and provides conditions for maintaining the stability of the relative position between the fixed seat or the movable seat and the rail during the upsetting process, thereby resisting the force generated during the upsetting process.

[0015] In the clamping process of the present invention, the first clamping member will synchronously drive the wedge-shaped rubber block at the first end of the flip block to contact the first position of the rail while clamping the first position of the rail, and make the inclined surface of the wedge-shaped rubber block contact and squeeze the first position of the rail. After the deformation of the wedge-shaped rubber block, it will still generate a force that overcomes the tendency of the rail to move relative to the first clamping member during the upsetting process, which is conducive to maintaining further stability of the clamping. It is further explained that in the process of the pushing block pushing the second clamping member and the third clamping member to clamp, the pushing block will push the linkage plate, and the linkage plate will synchronously drive multiple pushing rods to press the second ends of multiple flip blocks respectively, so that the flip block always maintains the force of flipping and pressing the wedge-shaped rubber block, so that after the wedge-shaped rubber block is deformed, the force that overcomes the tendency of the rail to displace relative to the first clamping member during the forging process is enhanced, which is conducive to maintaining further stability of the clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings: Figure 1 This is a first overall structural schematic diagram of a long rail welding device according to an embodiment of the present invention; Figure 2 A schematic structural diagram of a rail of a long rail welding device according to an embodiment of the present invention; Figure 3 This is a structural cross-sectional view of a first clamping member and a socket of a long rail welding device according to an embodiment of the present invention; Figure 4 This is a structural cross-sectional view of a first clamping member of a long rail welding device according to an embodiment of the present invention; Figure 5 for Figure 4 Enlarged view of part A; Figure 6 This is a schematic structural diagram of a second clamping member of a long rail welding device according to an embodiment of the present invention; Figure 7 This is a schematic structural diagram of a third clamping member of a long rail welding device according to an embodiment of the present invention; Figure 8 This is a schematic structural diagram of a second cylinder and a push block of a long rail welding device according to an embodiment of the present invention; Fig. 9 It is a structural schematic diagram of two states of a first clamping member of a long rail welding device according to an embodiment of the present invention; Fig.10 This is a second overall structural schematic diagram of a long rail welding device according to an embodiment of the present invention; Fig.11 The present invention is a flowchart of a welding method according to an embodiment of the present invention.

[0017] Description of reference numerals: 1-movable seat; 2-fixed seat; 201-hanging interface; 3-third cylinder; 4-clamping cavity; 5-plug seat; 6-first cylinder; 7-first clamping member; 8-driving cavity; 9-first connecting groove; 10-second clamping member; 11-second cylinder; 12-pushing block; 1201-first pushing surface; 1202-second pushing surface; 1203-third pushing surface; 13-second connecting groove; 14-third clamping member; 15-elastic support member; 15 01-support rod; 1502-reset spring; 16-connecting chamber; 17-flip block; 1701-first end; 1702-second end; 18-wedge-shaped rubber block; 19-pushing rod; 20-linkage plate; 21-limiting seat; 22-rail; 2201-first position; 2202-second position; 2203-third position; 23-first adaptive roller; 24-second adaptive roller; 25-positioning seat; 26-elastic pad; 27-support seat. DETAILED DESCRIPTION

[0018] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0022] like Figures 1 to 10 As shown, in one embodiment, a long rail welding device includes a movable seat 1 and a fixed seat 2, the movable seat 1 is slidably plugged into the fixed seat 2, and the top of the fixed seat 2 also has a hanging interface 201, which is convenient for the external lifting vehicle to connect; A linear drive assembly is arranged between the movable seat 1 and the fixed seat 2, and the linear drive assembly is used to drive the movable seat 1 to move. The linear drive assembly includes a third cylinder 3, and the third cylinder 3 is fixedly mounted on the surface of the fixed seat 2, and the piston rod end of the third cylinder 3 is fixedly connected to the movable seat 1. It should be understood that during the top forging process, the third cylinder 3 is started, and the third cylinder 3 pulls the movable seat 1, and the movable seat 1 synchronously drives one of the rails 22 to move, so that the welding end of the rail 22 on the movable seat 1 and the welding end of the rail 22 on the fixed seat 2 are top forged.

[0023] The movable seat 1 and the fixed seat 2 both have a clamping cavity 4, and the clamping cavity 4 has a clamping assembly, which includes: The first clamping assembly is used to clamp the two first positions 2201 of the rail 22. The first clamping assembly includes two sockets 5 and two first cylinders 6. The two sockets 5 are fixedly connected to the two sides of the inner wall of the clamping cavity 4. The first clamping members 7 are slidably inserted in the two sockets 5. The ends of the first clamping members 7 are in contact with the first positions 2201 of the rail 22. It should be understood that the first clamping members 7 will clamp the first positions 2201 of the rail 22 under the push of the first cylinders 6, so that the first positions 2201 on both sides of the rail 22 are clamped, so as to realize the positioning of the concave surface of the rail 22; Specifically, the top and bottom surfaces of the first clamping member 7 are also rotatably provided with the first adaptive roller 23 and the second adaptive roller 24, respectively. In the process of the first clamping member 7 clamping the rail 22, the first adaptive roller 23 and the second adaptive roller 24 respectively support the top and bottom ends of the concave surface of the rail 22, and automatically adjust the position of the first clamping member 7 to the center, so as to prepare for the position adjustment of the subsequent clamping of the second clamping assembly and the third clamping assembly.

[0024] The two first cylinders 6 are fixedly connected on both sides of the movable seat 1 or the fixed seat 2, the piston rods of the two first cylinders 6 penetrate the movable seat 1 or the fixed seat 2 and extend to the inside of the socket 5, the ends of the piston rods of the two first cylinders 6 are respectively fixedly connected to the two first clamping members 7. It should be understood that during the clamping process, the first cylinder 6 is started, the first cylinder 6 pushes the first clamping member 7, and the first clamping member 7 moves under the support of the socket 5, providing clamping power for the first clamping member 7.

[0025] The second clamping assembly is used to clamp the second position 2202 of the rail 22. The second clamping assembly includes a driving chamber 8, which is opened inside the first clamping member 7. A first connecting groove 9 is opened at the top of the driving chamber 8. A second clamping member 10 is slidably arranged in the first connecting groove 9. The top of the second clamping member 10 contacts the second position 2202 of the rail 22. A pushing assembly is arranged inside the driving chamber 8. The pushing assembly includes a second cylinder 11. A pushing block 12 is fixedly connected to the end of the piston rod of the second cylinder 11. During the holding process, the second cylinder 11 pushes the push block 12 to press against the second clamping member 10, so that the second clamping member 10 clamps the second position 2202 of the rail 22. It should be understood that after the first clamping member 7 completes the clamping of the first position 2201 of the rail 22, the second cylinder 11 is started, the second cylinder 11 pushes the push block 12, and the push block 12 pushes the second clamping member 10 to move until the top end of the second clamping member 10 presses against the second position 2202 of the rail 22, so as to achieve the clamping and positioning of the second position 2202 of the rail 22. The third clamping assembly is used to clamp the third position 2203 of the rail 22. The third clamping assembly includes a second connecting groove 13. The second connecting groove 13 is arranged at the inner bottom end of the driving cavity 8. A third clamping member 14 is slidably arranged in the second connecting groove 13. The bottom end of the third clamping member 14 contacts the third position 2203 of the rail 22. During the clamping process, the second cylinder 11 pushes the push block 12 to press against the third clamping member 14, so that the second clamping member 10 clamps the third position 2203 of the rail 22. It should be understood that during the clamping process, The second cylinder 11 drives the pushing block 12 to press against the second clamping member 10, and at the same time presses against the third clamping member 14. The bottom end of the third clamping member 14 presses against the third position 2203 of the rail 22, thereby realizing the clamping and positioning of the first position 2201, the second position 2202 and the third position 2203 of the rail 22, and realizing multi-point clamping according to the shape characteristics of the rail 22, which is beneficial to maintaining the stability of the clamping, and provides conditions for maintaining the stability of the relative position between the fixed seat 2 or the movable seat 1 and the rail 22 during the upsetting process, thereby resisting the force generated during the upsetting process.

[0026] Specifically, an elastic support member 15 is provided between the second clamping member 10 and the third clamping member 14 and the surface of the first clamping member 7, and the elastic support member 15 includes a support seat 27, and the support seat 27 is fixedly connected to the top or bottom surface of the first clamping member 7, and the support seat 27 is slidably inserted between the second clamping member 10 or the third clamping member 14, and the elastic support member 15 is fixedly connected between the support seat 27 and the second clamping member 10 or the third clamping member 14. It should be understood that when the push block 12 loses its force on the second clamping member 10 and the third clamping member 14, the second clamping member 10 and the third clamping member 14 are pulled and reset under the support of the elastic support member 15, and the clamping positioning of the second clamping member 10 and the third clamping member 14 on the second position 2202 and the third position 2203 of the rail 22 are automatically cancelled.

[0027] The elastic support member 15 includes a support rod 1501, which is fixedly connected to the surface of the support seat 27 and slidably inserted into the second clamping member 10 or the third clamping member 14. A return spring 1502 is slidably sleeved on the surface of the support rod 1501. At the position of the second clamping member 10, the two ends of the return spring 1502 are respectively fixedly connected to the support seat 27 and the second clamping member 10. At the position of the third clamping member 14, the two ends of the return spring 1502 are respectively fixedly connected to the support seat 27 and the third clamping member 14.

[0028] like Figures 3 to 5 As shown, in one embodiment, a connecting cavity 16 is opened at the end of the first clamping member 7, and a positioning seat 25 is fixedly connected to the interior of the connecting cavity 16. A plurality of flip blocks 17 are rotatably connected in the positioning seat 25. The plurality of flip blocks 17 each include a first end 1701 and a second end 1702. The first end 1701 of the flip block 17 is fixedly connected to a wedge-shaped rubber block 18. The second end 1702 of the flip block 17 is contacted with a push rod 19. The plurality of push rods 19 all extend to the interior of the driving cavity 8 after passing through the positioning seat 25. The plurality of push rods 19 are located at one end of the driving cavity 8 and are fixedly connected to a linkage plate 20. During the clamping process, the push block 12 pushes the linkage plate 20 under the push of the second cylinder 11. It should be understood that, during the clamping process, the first clamping member 7 will synchronously drive the wedge-shaped rubber block 18 of the first end 1701 of the flip block 17 to contact the first position 2201 of the rail 22 while clamping the first position 2201 of the rail 22, and make the inclined surface of the wedge-shaped rubber block 18 contact and squeeze the first position 2201 of the rail 22. After the deformation of the wedge-shaped rubber block 18, it will still generate a force that overcomes the tendency of the rail 22 to move relative to the first clamping member 7 during the upsetting process, which is conducive to maintaining further stability of the clamping; It is further explained that in the process of the pushing block 12 pushing the second clamping member 10 and the third clamping member 14 to clamp, the pushing block 12 will push the linkage plate 20, and the linkage plate 20 will synchronously drive multiple pushing rods 19 to respectively apply constant pressure to the second ends 1702 of multiple flip blocks 17, so that the flip block 17 always maintains the force of flipping and pressing the wedge-shaped rubber block 18, so that after the wedge-shaped rubber block 18 is deformed, the force that overcomes the tendency of the rail 22 to move relative to the first clamping member 7 during the forging process is enhanced, which is conducive to maintaining further stability of the clamping.

[0029] like Figure 4 and Figure 5 As shown, in one embodiment, a plurality of limiting seats 21 corresponding to the plurality of flip blocks 17 are fixedly connected in the positioning seat 25, and the plurality of limiting seats 21 have limiting ends, and an elastic pad 26 is fixedly connected between the limiting ends of the limiting seats 21 and the second ends 1702 of the flip blocks 17 at the corresponding positions. It should be understood that when the linkage plate 20 is not pushed, the flip blocks 17 are kept stationary under the support of the elastic pad 26, so that the flip blocks 17 maintain the wedge-shaped rubber block 18 fixing the first end 1701 of the flip blocks 17 to be clamped.

[0030] like Figure 8 As shown, in one embodiment, the pushing block 12 includes a first pushing surface 1201, a second pushing surface 1202 and a third pushing surface 1203. The first pushing surface 1201, the second pushing surface 1202 and the third pushing surface 1203 are used to tighten the second clamping member 10, the second clamping member 10 and the linkage plate 20 respectively during the clamping process.

[0031] like Fig.11 As shown, in one embodiment, a welding method comprises the following steps: Step 1, installation: Use an external lifting vehicle to respectively place the movable seat 1 and the fixed seat 2 on two rails 22; Step 2, clamping process: clamp the first position 2201 of the rail 22 by the first clamping assembly, clamp the second position 2202 of the rail 22 by the second assembly, and clamp the third position 2203 of the rail 22 by the third clamping assembly, thereby realizing multi-point clamping; Step three, top forging treatment, the movable seat 1 is driven to move by the linear drive component, and the movable seat 1 drives one of the rails 22 to move through the clamping component, so that the welding end of the rail 22 on the movable seat 1 and the end of the rail 22 on the fixed seat 2 are pressed against each other to achieve top forging treatment.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A long rail welding device, comprising a movable seat (1) and a fixed seat (2), wherein the movable seat (1) is slidably plugged into the fixed seat (2), and characterized in that: A linear drive assembly is provided between the movable seat (1) and the fixed seat (2), the linear drive assembly being used to drive the movable seat (1) to move, the movable seat (1) and the fixed seat (2) both having a clamping cavity (4), the clamping cavity (4) having a clamping assembly therein, the clamping assembly being used to clamp the periphery of the rail (22), and the clamping assembly comprising a first clamping assembly, a second clamping assembly and a third clamping assembly, the first clamping assembly being used to clamp the two first positions (2201) of the rail (22); and a second clamping assembly, the second clamping assembly being used to clamp the second position (2202) of the rail (22); A third clamping assembly, the third clamping assembly is used to clamp the third position (2203) of the rail (22).

2. A long rail welding device according to claim 1, characterized in that: The first clamping assembly comprises two sockets (5) and two first cylinders (6), the two sockets (5) being fixedly connected to two sides of the inner wall of the clamping cavity (4), the first clamping members (7) being slidably inserted in the two sockets (5), and the end of the first clamping member (7) being in contact with the first position (2201) of the rail (22); The two first cylinders (6) are fixedly connected to both sides of the movable seat (1) or the fixed seat (2); the piston rods of the two first cylinders (6) penetrate the movable seat (1) or the fixed seat (2) and extend to the inside of the plug-in seat (5); and the ends of the piston rods of the two first cylinders (6) are respectively fixedly connected to the two first clamping members (7).

3. A long rail welding device according to claim 2, characterized in that: The second clamping assembly comprises a driving chamber (8), the driving chamber (8) being arranged inside the first clamping member (7), a first connecting groove (9) being arranged at the top end of the driving chamber (8), a second clamping member (10) being slidably arranged in the first connecting groove (9), the top end of the second clamping member (10) being in contact with a second position (2202) of the rail (22), a pushing assembly being arranged inside the driving chamber (8), the pushing assembly comprising a second cylinder (11), a pushing block (12) being fixedly connected to the end of a piston rod of the second cylinder (11), and during the clamping process, the pushing block (12) is pushed by the second cylinder (11) to press against the second clamping member (10), so that the second clamping member (10) clamps the second position (2202) of the rail (22).

4. A long rail welding device according to claim 3, characterized in that: The third clamping assembly comprises a second connecting groove (13), the second connecting groove (13) being opened at the inner bottom end of the driving cavity (8), a third clamping member (14) being slidably arranged in the second connecting groove (13), the bottom end of the third clamping member (14) being in contact with the third position (2203) of the rail (22), and during the clamping process, the second cylinder (11) pushes the pushing block (12) to press against the third clamping member (14), so that the second clamping member (10) clamps the third position (2203) of the rail (22).

5. A long rail welding device according to claim 4, characterized in that: An elastic support member (15) is provided between the second clamping member (10) and the third clamping member (14) and the surface of the first clamping member (7); the elastic support member (15) comprises a socket (5); the socket (5) is fixedly connected to the top or bottom surface of the first clamping member (7); the socket (5) is slidably plugged into the second clamping member (10) or the third clamping member (14); and the elastic support member (15) is fixedly connected between the socket (5) and the second clamping member (10) or the third clamping member (14).

6. A long rail welding device according to claim 5, characterized in that: A connecting cavity (16) is provided at the end of the first clamping member (7). A positioning seat (25) is fixedly connected to the interior of the connecting cavity (16). A plurality of flipping blocks (17) are rotatably connected to the interior of the positioning seat (25). The plurality of flipping blocks (17) each comprise a first end (1701) and a second end (1702). The first end (1701) of the flipping block (17) is fixedly connected to a wedge-shaped rubber block (18). The second end (1702) of the flipping block (17) is contacted with a push rod (19). The plurality of push rods (19) extend into the interior of the driving cavity (8) after penetrating the positioning seat (25). A linkage plate (20) is fixedly connected to one end of the plurality of push rods (19) located in the driving cavity (8). During the clamping process, the push block (12) pushes the linkage plate (20) under the push of the second cylinder (11).

7. A long rail welding device according to claim 6, characterized in that: A plurality of limit seats (21) corresponding one to one with the plurality of flip blocks (17) are also fixedly connected inside the positioning seat (25), and the plurality of limit seats (21) have limit ends, and an elastic pad (26) is fixedly connected between the limit ends of the limit seats (21) and the second ends (1702) of the flip blocks (17) at corresponding positions.

8. A long rail welding device according to claim 5 or 6, characterized in that: The pushing block (12) comprises a first pushing surface (1201), a second pushing surface (1202) and a third pushing surface (1203); the first pushing surface (1201), the second pushing surface (1202) and the third pushing surface (1203) are used to respectively press against the first clamping member (7), the second clamping member (10) and the linkage plate (20) during the clamping process.

9. A long rail welding device according to claim 8, characterized in that: The linear drive assembly comprises a third cylinder (3), the third cylinder (3) being fixedly mounted on the surface of the fixed seat (2), and the end of the piston rod of the third cylinder (3) being fixedly connected to the movable seat (1).

10. A welding method, applicable to the long rail welding device according to claim 1, characterized in that: The following steps are involved: Step 1, installation: using an external lifting vehicle to respectively place the movable seat (1) and the fixed seat (2) on two steel rails (22); Step 2, clamping processing: clamping the first position (2201) of the rail (22) by a first clamping assembly, clamping the second position (2202) of the rail (22) by a second clamping assembly, and clamping the third position (2203) of the rail (22) by a third clamping assembly, thereby achieving multi-point clamping; Step three, top forging treatment, the movable seat (1) is driven to move by the linear drive component, and the movable seat (1) drives one of the rails (22) to move through the clamping component, so that the welded end of the rail (22) on the movable seat (1) and the end of the rail (22) on the fixed seat (2) are pressed against each other, thereby achieving top forging treatment.

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