Contact network wire welding device with counter-pull test structure

Abstract

The utility model provides an overhead line system wire welding device with a counter-pull test structure, and belongs to the technical field of railway engineering. The device is provided with a lifting operation platform, the lifting operation platform comprises a working platform, the number of tensioning mechanisms is two, the tensioning mechanisms are symmetrically arranged on the working platform in the longitudinal direction of the working platform, and the tensioning mechanisms are used for tensioning and locking wires on the two sides of the contact network breaking point position; the welding machine assembly is supported on the working platform through the longitudinal moving mechanism, and the longitudinal moving mechanism enables the welding machine assembly to longitudinally move to a welding position; and the two sets of counter-pulling mechanisms are symmetrically arranged on the working platform in the longitudinal direction of the working platform, and the counter-pulling mechanisms are used for tensioning wires on the two sides of a welded contact net breaking point to carry out a counter-pulling test. According to the utility model, the contact network breakpoint is welded, so that the mechanical property and the electrical property of the contact network breakpoint are kept unchanged; in addition, the counter-pull mechanism is arranged to perform on-site counter-pull test on the welding spots, so that on-site evaluation of welding quality is realized, and the later use performance of the overhead line system wire is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of railway engineering, and particularly relates to a catenary wire welding device with a reverse pull test structure. Background Art

[0002] The catenary of electrified railway is a special power supply line without backup. During operation, due to excessive local wear, abnormal defects or some sudden accidents, the catenary may have a broken wire fault. At present, there are the following two treatment schemes for the broken catenary in China:

[0003] 1. Temporary clamp fixing and repair, with low pantograph-catenary current collection quality: The clamp connection method is essentially a physical connection, and there are potential safety hazards in terms of mechanical strength, electrical performance, etc. at the connection point. It is easy to have a broken wire again during long-term operation. In addition, due to the change in mass distribution at the connection point, stress concentration points are likely to be formed during the pantograph-catenary matching process, thereby generating pantograph-catenary hard points and affecting the pantograph-catenary current collection quality.

[0004] 2. Difficult construction for replacing the whole anchor section of the wire, with high operation and maintenance costs: At present, in the practice of high-speed railway traction power supply operation and maintenance management, the method to completely eliminate the wire connection point is to replace the whole anchor section of the wire. When a serious impact or broken wire fault occurs in the contact wire, first use a clamp connection to adjust the line to resume operation, and then arrange a skylight to replace the wire of the whole anchor section.

[0005] In view of the problems existing in the above treatment methods, such as easy breakage after repair, affecting the pantograph-catenary current collection quality, complex operation process for wire replacement, low replacement efficiency, high maintenance cost, and large consumption of manpower and material resources. Among them, Patent CN202122832980.X discloses an electrified railway catenary maintenance operation vehicle, which specifically discloses that: on the workbenches on both sides of the lifting operation platform, there are wire tensioning devices for tensioning and locking the wires at the broken point position of the catenary, and in the middle of the lifting operation platform, there is a wire welding device for welding the tensioned broken point of the catenary. By setting on the lifting operation platform to tension and position the two wires at the broken point position of the catenary to the welding position, and then welding by the wire welding device arranged in the middle of the lifting operation platform, the catenary emergency repair efficiency is greatly improved, the emergency repair process at the broken point of the catenary wire is simplified, and the emergency repair cost is reduced. Although this patent can keep the mechanical properties and electrical properties unchanged by welding the catenary break point, save labor costs, improve operation efficiency and safety guarantee, there is still a problem that the welding quality of the catenary break point cannot be evaluated by on-site tests, and the welding quality of the catenary break point cannot be guaranteed. Therefore, improvements are proposed. Content of the Utility Model

[0006] Technical problems to be solved by the utility model: The utility model provides a catenary conductor welding device with a reverse tension test structure in view of the deficiencies of the prior art. The purpose is to not only realize the welding of the catenary break point, so that its mechanical properties and electrical properties remain unchanged, making up for the deficiencies of the temporary clamp fixing repair and the overall anchor section conductor replacement construction, but also realize the on-site reverse tension test of the welded joint, realize the on-site evaluation of the welding quality, and ensure the later use performance of the catenary conductor.

[0007] To achieve the above purpose, the technical solution adopted by the utility model:

[0008] A catenary conductor welding device with a reverse tension test structure, which has a lifting operation platform. The lifting operation platform includes a working platform, and a tensioning mechanism, a longitudinal moving mechanism, a welding machine assembly and a reverse tension mechanism are arranged on the working platform;

[0009] There are two sets of the tensioning mechanisms, which are symmetrically arranged along the longitudinal direction of the working platform on the working platform. The tensioning mechanism is used to tension and lock the conductors on both sides of the catenary break point;

[0010] The welding machine assembly is supported on the working platform by the longitudinal moving mechanism. The longitudinal moving mechanism moves the welding machine assembly longitudinally to the welding position and assists the welding machine to complete the welding operation of the tensioned catenary break point;

[0011] There are two sets of the reverse tension mechanisms, which are symmetrically arranged along the longitudinal direction of the working platform on the working platform. The reverse tension mechanism is used to tension the conductors on both sides of the welded catenary break point for reverse tension test.

[0012] For further limitation of the above scheme, each set of the reverse tension mechanism includes a reverse tension oil cylinder, a reverse tension rigging and a pulley assembly. The two reverse tension oil cylinders in the two sets of reverse tension mechanisms are symmetrically installed on the lower plane of the working platform along the longitudinal direction of the working platform; support columns are arranged at both longitudinal ends of the upper part of the working platform, and pulley assemblies are arranged on the support columns. One end of the reverse tension rigging is connected to the piston rod of the corresponding reverse tension oil cylinder, and the other end bypasses the pulley assembly at the corresponding end and is connected to a reverse tension wire clamp.

[0013] For further limitation of the above scheme, pulley assemblies for guiding the reverse tension rigging are arranged at both the upper and lower parts of the support column. After being guided by the pulley assembly at the lower part, the lower end of the reversely tensioned reverse tension rigging is parallel to the axis of the reverse tension oil cylinder, and after being guided by the pulley assembly at the upper part, the upper end of the reversely tensioned reverse tension rigging is parallel to the conductor.

[0014] For further limitation of the above solution, each set of the tensioning mechanism includes a tensioning oil cylinder, a tensioning rigging, a support and limit assembly, and a roller assembly; the two tensioning oil cylinders in the two sets of the tensioning mechanisms are symmetrically arranged and installed along the longitudinal direction of the working platform. Roller assemblies are provided at the upper and lower parts of each support column, a support and limit assembly is provided at the lower part of each support column, one end of the tensioning rigging is connected to the piston rod of the corresponding tensioning oil cylinder, and the other end is connected to the tensioning wire clamp after being guided by the corresponding side support and limit assembly and roller assembly.

[0015] For further limitation of the above solution, when the tensioning rigging is tightened, its lower end is parallel to the axis of the piston rod of the corresponding side tensioning oil cylinder through the guidance of the support and limit assembly, and when the tensioning rigging is tightened, its upper end is parallel to the wire to be tensioned through the guidance of the roller assembly.

[0016] For further limitation of the above solution, an oil cylinder protective cover is provided on the upper part of the piston rod of the tensioning oil cylinder.

[0017] For further limitation of the above solution, the longitudinal movement mechanism includes a guide rail support, a guide rail, a slider, a longitudinal movement chassis, a longitudinal movement oil cylinder, and a locking mechanism;

[0018] The guide rail support is fixed in the middle of the upper surface of the working platform, the guide rail is fixedly installed on the guide rail support, the slider is installed on the guide rail and can move along the direction of the guide rail, the longitudinal movement chassis is fixedly installed on the slider, the piston rod of the longitudinal movement oil cylinder is connected to the oil cylinder seat of the longitudinal movement chassis through pin cooperation, the oil cylinder seat of the longitudinal movement chassis is fixedly connected to the longitudinal movement chassis, the cylinder barrel of the longitudinal movement oil cylinder is connected to the oil cylinder seat of the longitudinal movement through pin cooperation, and the oil cylinder seat of the longitudinal movement is fixed on the working platform; the action of the longitudinal movement oil cylinder realizes the movement of the longitudinal movement chassis.

[0019] For further limitation of the above solution, the longitudinal movement chassis is locked by the locking mechanism after moving to the initial position; the locking mechanism includes a fixed seat and a positioning seat. The fixed seat is fixed on the outer wall of the long side of the longitudinal movement chassis, the positioning seat is fixed on the middle side beam of the working platform. When the longitudinal movement chassis moves to the initial position, the through holes on the fixed seat and the positioning seat are coaxial and are connected by inserting a mechanical locking pin. An L-shaped seat is provided on the longitudinal movement chassis. When the longitudinal movement chassis is in the moving working state, the mechanical locking pin is removed from the fixed seat and inserted and stored on the L-shaped seat.

[0020] For further limitation of the above solution, the welding machine assembly includes a welding machine and a scissor mechanism. The welding machine is fixedly installed on the scissor mechanism, and the scissor mechanism is fixedly installed on the longitudinal movement chassis. The scissor mechanism is used to assist the welding machine in adjusting the height of the weld bead.

[0021] Advantages of the present utility model compared with the prior art:

[0022] 1. This solution not only realizes welding the break point of the catenary to keep its mechanical and electrical properties unchanged, thus making up for the deficiencies of fixing and repairing with temporary clamps and replacing the wires of the overall anchor section, saving a large amount of labor costs, improving the operation efficiency and safety guarantee; but also conducts on-site reverse pulling tests on the welded joints by setting up a reverse pulling mechanism, scientifically and comprehensively verifying the welding quality in the way of reverse pulling tests, realizing on-site evaluation of welding quality, and ensuring the later service performance of the catenary wires.

[0023] 2. This solution realizes the mechanical locking of the initial position of the longitudinal movement mechanism by setting up a locking mechanism, providing a reliable safety guarantee for transportation and train operation;

[0024] 3. In this solution, the catenary wires are flexibly connected to the tensioning and reverse pulling rigging through wire clamps, and the wire tensioning is completed by using the method of oil cylinder tensioning. The overall structure is simple and convenient for the operation of construction workers;

[0025] 4. The entire construction operation process of this solution has simple processes and a high degree of mechanization, and has high application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is the main structural view of the present utility model;

[0027] Figure 2 is the top structural view of the present utility model;

[0028] Figure 3 is the present utility model Figure 2 the sectional view taken along the line A-A in;

[0029] Figure 4 is the structural schematic diagram of the lifting operation platform in the present utility model;

[0030] Figure 5 is the installation structural schematic diagram of the tensioning mechanism on the lifting operation platform in the present utility model;

[0031] Figure 6 is the installation structural schematic diagram of the tensioning rigging in the present utility model;

[0032] Figure 7 is the structural schematic diagram of the support and limit assembly in the present utility model;

[0033] Figure 8 is the structural schematic diagram of the longitudinal movement mechanism in the present utility model;

[0034] Figure 9 is the structural schematic diagram of the locking structure in the present utility model;

[0035] Figure 10 is the structural schematic diagram of the welding machine assembly in the present utility model;

[0036] Figure 11 This is a schematic installation structure diagram of the anti-pull mechanism on the lifting work platform in the present utility model;

[0037] Figure 12 This is a schematic installation structure diagram of the anti-pull rigging in the present utility model. Specific embodiments

[0038] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0039] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model 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, should not be construed as a limitation to the present utility model.

[0040] It should be noted that in this article, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, the element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0041] Please refer to Figures 1-12 , and describe in detail the embodiments of the present utility model.

[0042] Embodiment: As Figures 1-2 shown, a catenary wire welding device with an anti-pull test structure includes a lifting work platform 1. The lifting work platform 1 includes a working platform 1-1, and a tensioning mechanism 2, a longitudinal movement mechanism 3, a welding machine assembly 4, and an anti-pull mechanism 5 are arranged on the working platform 1-1;

[0043] Two sets of the tensioning mechanisms 2 are provided and symmetrically arranged along the longitudinal direction of the working platform 1-1 on the working platform 1-1. The tensioning mechanism 2 is used to tension and lock the wires on both sides at the catenary break point position;

[0044] The welding machine assembly 4 is supported on the working platform 1-1 by the longitudinal movement mechanism 3. The longitudinal movement mechanism 3 moves the welding machine assembly 4 longitudinally to the welding position and assists the welding machine to complete the welding operation on the broken point of the tightened catenary.

[0045] There are two sets of the anti-pulling mechanisms 5, which are symmetrically arranged along the longitudinal direction of the working platform 1-1 on the working platform 1-1. The anti-pulling mechanisms 5 are used to tighten the wires on both sides of the broken point of the welded catenary for the anti-pulling test.

[0046] In the above embodiment, during on-site construction operations, after the tensioning mechanism 2 pulls out the wire to an appropriate length, the longitudinal movement mechanism 3 moves the welding machine assembly 4 to the welding position to assist the welding machine to complete the wire break welding construction operation, reducing the labor intensity of on-site personnel and improving the on-site operation efficiency. After welding, to verify the welding quality, the anti-pulling test is carried out on the wire through the anti-pulling mechanism 5, providing a test basis for the welding quality assessment. The entire construction operation process has simple procedures and a high degree of mechanization, and has high application value.

[0047] In a specific embodiment: As Figures 11-12 shown, the specific structure of the anti-pulling mechanism 5 is as follows: Each set of the anti-pulling mechanism 5 includes an anti-pulling oil cylinder 5-1, an anti-pulling rigging 5-2 and a pulley assembly 5-3. The two anti-pulling oil cylinders 5-1 in the two sets of the anti-pulling mechanisms 5 are symmetrically installed on the lower plane of the working platform 1-1 along the longitudinal direction of the working platform 1-1; Support columns 6 are provided at both longitudinal ends of the upper part of the working platform 1-1, and pulley assemblies 5-3 are provided on the support columns 6. One end of the anti-pulling rigging 5-2 is connected to the piston rod of the corresponding anti-pulling oil cylinder 5-1, and the other end bypasses the pulley assembly 5-3 at the corresponding end and is connected to the anti-pulling wire clamp 5-4.

[0048] Wherein, pulley assemblies 5-3 for guiding the anti-pulling rigging 5-2 are provided at both the upper and lower parts of the support column 6. After being guided by the pulley assembly 5-3 at the lower part, the lower end of the reversely tightened anti-pulling rigging 5-2 is parallel to the axis of the anti-pulling oil cylinder 5-1, and after being guided by the pulley assembly 5-3 at the upper part, the upper end of the reversely tightened anti-pulling rigging 5-2 is parallel to the wire.

[0049] When the above anti-pulling mechanism 5 is used, the anti-pulling wire clamp 5-4 is connected to the wire through manual operation, and the anti-pulling mechanism 5 performs the anti-pulling test on the welding point by synchronously contracting the anti-pulling oil cylinder 5-1 to verify the reliability of the welding quality. The entire construction operation process has simple procedures and a high degree of mechanization, and has high application value.

[0050] In a specific embodiment: As Figure 3 、 5As shown in Figure -7, the specific structure of the tensioning mechanism 2 is as follows: Each set of the tensioning mechanism 2 includes a tensioning oil cylinder 2-1, a tensioning rigging 2-2, a support and limit assembly 2-3, and a roller assembly 2-4; The two tensioning oil cylinders 2-1 in the two sets of the tensioning mechanism 2 are symmetrically arranged and installed along the longitudinal direction of the working platform 1-1. Roller assemblies 2-4 are provided at the upper and lower parts of each support column 6. A support and limit assembly 2-3 is provided at the lower part of each support column 6. One end of the tensioning rigging 2-2 is connected to the piston rod of the corresponding tensioning oil cylinder 2-1, and the other end is connected to the tensioning wire clamp 2-6 after being guided by the corresponding support and limit assembly 2-3 and roller assembly 2-4. In this structure, the tensioning mechanism can be replaced by a hoisting mechanism.

[0051] In this embodiment, preferably, when the tensioning rigging 2-2 is tensioned, its lower end is parallel to the axis of the piston rod of the corresponding tensioning oil cylinder 2-1 through the guidance of the support and limit assembly 2-3, and its upper end is parallel to the wire to be tensioned through the guidance of the roller assembly 2-4 when the tensioning rigging 2-2 is tensioned.

[0052] In this embodiment, preferably, an oil cylinder protection cover 2-5 is provided on the upper part of the piston rod of the tensioning oil cylinder 2-1.

[0053] When the tensioning mechanism 2 is in use: The tensioning wire clamp 2-6 is connected to the wire through manual operation. The tensioning mechanism 2 synchronously contracts the tensioning oil cylinder 2-1 to pull out an appropriate length of the wire. The support and limit assembly 2-3 is installed on the support column 6 to prevent the piston rod of the tensioning oil cylinder 2-1 from being laterally offset-loaded and leaking. The roller assembly 2-4 is installed on the support column 6 to guide the tensioning rigging 2-2; The oil cylinder protection covers 2-5 are symmetrically arranged on the upper part of the piston rod of the tensioning oil cylinder 2-1 to prevent the tensioning rigging 2-2 from breaking and causing personal injury to the operators, and have a safety protection function.

[0054] In a specific embodiment: As Figure 8 shown, the specific structure of the longitudinal movement mechanism 3 is as follows: The longitudinal movement mechanism 3 includes a guide rail support 3-1, a guide rail 3-2, a slider 3-3, a longitudinal movement chassis 3-4, a longitudinal movement oil cylinder 3-5, and a locking mechanism 3-8; The guide rail support 3-1 is fixed to the middle of the upper surface of the working platform 1-1. The guide rail 3-2 is fixedly installed on the guide rail support 3-1. The slider 3-3 is installed on the guide rail 3-2 and can move along the direction of the guide rail. The longitudinal movement chassis 3-4 is fixedly installed on the slider 3-3. The piston rod of the longitudinal movement oil cylinder 3-5 is connected to the longitudinal movement chassis oil cylinder seat 3-6 through pin fitting. The longitudinal movement chassis oil cylinder seat 3-6 is fixedly connected to the longitudinal movement chassis 3-4. The cylinder barrel of the longitudinal movement oil cylinder 3-5 is connected to the longitudinal movement oil cylinder seat 3-7 through pin fitting. The longitudinal movement oil cylinder seat 3-7 is fixed on the working platform 1-1; The action of the longitudinal movement oil cylinder 3-5 realizes the movement of the longitudinal movement chassis 3-4 to the welding position.

[0055] Specifically, after the longitudinal moving chassis 3-4 moves to the initial position, it is locked by the locking mechanism 3-8; as Figure 9 shown, the locking mechanism 3-8 includes a fixed seat 3-8-1 and a positioning seat 3-8-2. The fixed seat 3-8-1 is fixed on the outer wall of the long side of the longitudinal moving chassis 3-4, and the positioning seat 3-8-2 is fixed on the middle side beam of the working platform 1-1. When the longitudinal moving chassis 3-4 moves to the initial position, the through holes on the fixed seat 3-8-1 and the positioning seat 3-8-2 are coaxial and are connected by inserting a mechanical locking pin shaft 3-8-3, realizing the mechanical locking of the initial position of the longitudinal moving mechanism. An L-shaped seat 3-8-4 is provided on the longitudinal moving chassis 3-4. When the longitudinal moving chassis 3-4 is in the moving working state, the mechanical locking pin shaft 3-8-3 is removed from the fixed seat 3-8-1 and inserted and stored on the L-shaped seat 3-8-4.

[0056] In the above structure, the mechanical locking of the initial position of the longitudinal moving mechanism is realized by setting the locking mechanism, providing reliable safety guarantee for transportation and driving.

[0057] In a specific embodiment: as Figure 10 shown, the specific structure of the welding machine assembly 4 is as follows: the welding machine assembly 4 includes a welding machine 4-1 and a scissor mechanism 4-2. The welding machine 4-1 is installed and fixed on the scissor mechanism 4-2, and the scissor mechanism 4-2 is installed and fixed on the longitudinal moving chassis 3-4. The scissor mechanism 4-2 is used to assist the welding machine 4-1 to adjust the height of the weld bead and complete the wire break welding construction operation.

[0058] In a specific embodiment: as Figure 3 shown, the specific structure of the lifting operation platform 1 is as follows: the lifting operation platform 1 further includes a lifting column 1-2. The lower part of the working platform 1-1 is fixedly connected to the inner column of the lifting column 1-2. The working platform 1-1 is the main load-bearing member, and the working platform 1-1 can realize the lifting action under the action of the lifting column 1-2.

[0059] The utility model integrates the tensioning mechanism, the anti-pulling mechanism, the longitudinal moving mechanism and the welding machine assembly on the lifting operation platform, not only realizing the effect that after the tensioning mechanism pulls out the wire to an appropriate length at the operation site, the longitudinal moving mechanism moves the welding machine assembly to the welding position to assist the welding machine to complete the wire break welding construction operation, reducing the labor intensity of on-site personnel and improving the on-site operation efficiency, but also enabling the on-site anti-pulling test to be carried out through the anti-pulling mechanism, providing a test basis for the welding quality assessment. The whole construction operation process has simple procedures and high mechanization degree, and has high use value.

[0060] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0061] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. Catenary wire welding device with a reverse tension test structure, having a lifting working platform (1), wherein the lifting working platform (1) comprises a working platform (1-1), characterized in that: A tensioning mechanism (2), a longitudinal movement mechanism (3), a welding machine assembly (4) and a reverse tensioning mechanism (5) are arranged on the working platform (1-1); There are two sets of the tensioning mechanisms (2), which are symmetrically arranged along the longitudinal direction of the working platform (1-1) on the working platform (1-1). The tensioning mechanism (2) is used to tension and lock the conductors on both sides at the position of the catenary break point; The welding machine assembly (4) is supported on the working platform (1-1) by the longitudinal movement mechanism (3). The longitudinal movement mechanism (3) moves the welding machine assembly (4) longitudinally to the welding position and assists the welding machine to complete the welding operation of the tensioned catenary break point; There are two sets of the reverse tensioning mechanisms (5), which are symmetrically arranged along the longitudinal direction of the working platform (1-1) on the working platform (1-1). The reverse tensioning mechanism (5) is used to tension the conductors on both sides of the welded catenary break point for reverse tensioning test.

2. The catenary conductor welding device with a reverse pull test structure according to claim 1, characterized in that: Each set of the reverse tensioning mechanism (5) includes a reverse tensioning oil cylinder (5-1), a reverse tensioning rigging (5-2) and a pulley assembly (5-3). The two reverse tensioning oil cylinders (5-1) in the two sets of the reverse tensioning mechanisms (5) are symmetrically installed on the lower plane of the working platform (1-1) along the longitudinal direction of the working platform (1-1); Support columns (6) are arranged at both longitudinal ends of the upper part of the working platform (1-1), and pulley assemblies (5-3) are arranged on the support columns (6). One end of the reverse tensioning rigging (5-2) is connected to the piston rod of the corresponding reverse tensioning oil cylinder (5-1), and the other end bypasses the pulley assembly (5-3) at the corresponding end and is connected to a reverse tensioning wire clamp (5-4).

3. The catenary wire welding device with a reverse pull test structure according to claim 2, characterized in that: Pulley assemblies (5-3) for guiding the reverse tensioning rigging (5-2) are arranged at both the upper and lower parts of the support column (6). After being guided by the pulley assembly (5-3) at the lower part, the lower end of the reversely tensioned reverse tensioning rigging (5-2) is parallel to the axis of the reverse tensioning oil cylinder (5-1). After being guided by the pulley assembly (5-3) at the upper part, the upper end of the reversely tensioned reverse tensioning rigging (5-2) is parallel to the conductor.

4. The catenary conductor welding device with a reverse pull test structure according to claim 2, characterized in that: Each set of the tensioning mechanism (2) includes a tensioning oil cylinder (2-1), a tensioning rigging (2-2), a support and limit assembly (2-3), and a roller assembly (2-4); The two tensioning oil cylinders (2-1) in the two sets of the tensioning mechanisms (2) are symmetrically arranged and installed along the longitudinal direction of the working platform (1-1). Roller assemblies (2-4) are arranged at both the upper and lower parts of each support column (6), and a support and limit assembly (2-3) is arranged at the lower part of each support column (6). One end of the tensioning rigging (2-2) is connected to the piston rod of the corresponding tensioning oil cylinder (2-1), and the other end is connected to a tensioning wire clamp (2-6) after being guided by the support and limit assembly (2-3) and the roller assembly (2-4) on the corresponding side.

5. The catenary wire welding device with a reverse pull test structure according to claim 4, characterized in that: When the tensioning rigging (2-2) is tensioned, its lower end is parallel to the axis of the piston rod of the corresponding tensioning oil cylinder (2-1) through the guidance of the support and limit assembly (2-3). When the tensioning rigging (2-2) is tensioned, its upper end is parallel to the tensioned conductor through the guidance of the roller assembly (2-4).

6. The catenary conductor welding device with a reverse pull test structure according to claim 4, characterized in that: An oil cylinder protection cover (2-5) is arranged on the upper part of the piston rod of the tensioning oil cylinder (2-1).

7. The catenary wire welding device with a reverse pull test structure according to claim 1, characterized in that: The longitudinal movement mechanism (3) includes a guide rail support (3-1), a guide rail (3-2), a slider (3-3), a longitudinal movement chassis (3-4), a longitudinal movement oil cylinder (3-5), and a locking mechanism (3-8); The guide rail support (3-1) is fixed to the middle of the upper surface of the working platform (1-1). The guide rail (3-2) is fixedly installed on the guide rail support (3-1). The slider (3-3) is installed on the guide rail (3-2) and can move along the direction of the guide rail. The longitudinal movement chassis (3-4) is fixedly installed on the slider (3-3). The piston rod of the longitudinal movement oil cylinder (3-5) is connected to the longitudinal movement chassis oil cylinder seat (3-6) through pin cooperation. The longitudinal movement chassis oil cylinder seat (3-6) is fixedly connected to the longitudinal movement chassis (3-4). The cylinder barrel of the longitudinal movement oil cylinder (3-5) is connected to the longitudinal movement oil cylinder seat (3-7) through pin cooperation. The longitudinal movement oil cylinder seat (3-7) is fixed on the working platform (1-1). The action of the longitudinal movement oil cylinder (3-5) realizes the movement of the longitudinal movement chassis (3-4).

8. The catenary conductor welding device with a reverse pull test structure according to claim 7, characterized in that: After the longitudinal movement chassis (3-4) moves to the initial position, it is locked by the locking mechanism (3-8). The locking mechanism (3-8) includes a fixed seat (3-8-1) and a positioning seat (3-8-2). The fixed seat (3-8-1) is fixed to the outer wall of the long side of the longitudinal movement chassis (3-4). The positioning seat (3-8-2) is fixed to the middle side beam of the working platform (1-1). When the longitudinal movement chassis (3-4) moves to the initial position, the through holes on the fixed seat (3-8-1) and the positioning seat (3-8-2) are coaxially aligned and are connected by inserting a mechanical locking pin (3-8-3). An L-shaped seat (3-8-4) is provided on the longitudinal movement chassis (3-4). When the longitudinal movement chassis (3-4) is in the moving working state, the mechanical locking pin (3-8-3) is removed from the fixed seat (3-8-1) and inserted and stored on the L-shaped seat (3-8-4).

9. The catenary conductor welding device with a reverse pull test structure according to claim 7, characterized in that: The welding machine assembly (4) includes a welding machine (4-1) and a scissor mechanism (4-2). The welding machine (4-1) is installed and fixed on the scissor mechanism (4-2). The scissor mechanism (4-2) is installed and fixed on the longitudinal movement chassis (3-4). The scissor mechanism (4-2) is used to assist the welding machine (4-1) in adjusting the height of the weld bead.

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