Ground wire thermit welding tool

Abstract

The utility model provides a grounding wire thermit welding tool which comprises a support, and a die is arranged on the support. A welding cavity and first threading holes are formed in the die, the first threading holes are communicated with the welding cavity, the number of the first threading holes is the same as that of grounding wires to be welded, the positions, relative to the welding cavity, of the first threading holes correspond to the welding connection form of the grounding wires, a welding block is arranged in the welding cavity, and second threading holes with the same number as the first threading holes are formed in the welding block. Each first threading hole corresponds to and is communicated with one second threading hole; the support is provided with clamps corresponding to the first threading holes outside the die and used for fixing the grounding wires to be welded. The ground wire welding device is suitable for field ground wire welding operation, and can solve the problem of deformation of the ground wire caused by high-temperature stress release during thermit welding.

Description

Technical Field

[0001] This utility model belongs to the field of aluminothermic welding of grounding wires, and in particular relates to a tooling for aluminothermic welding of grounding wires. Background Technology

[0002] Aluminothermic welding, also known as exothermic welding, is a primary method for welding lightning protection grounding wires. Its popularity stems from its simple operation, strong post-weld connections, and high tensile strength. Aluminothermic welding generates high temperatures through a chemical reaction, with instantaneous temperatures reaching 2000-2500 degrees Celsius, to reduce the grounding wires to pure copper. The liquefied copper then melts the grounding wires to be connected. However, in practice, copper-clad steel and zinc-clad steel wires are typically supplied in coils, requiring straightening on-site. The high temperature during welding causes the straightened grounding wire to bend at a large angle due to rapid stress release, resulting in significant deformation within the welding mold. Since the welding mold is made of graphite blocks and is brittle, the instantaneous deformation of the wire can easily lead to mold cracking or damage to the welding chamber. Furthermore, grounding welding is often carried out outdoors in uneven terrain, making it difficult to align the welded joints and resulting in low welding efficiency.

[0003] Currently, the industry mainly employs two methods to address the deformation problem during grounding wire welding: First, increasing the thickness of the mold or improving its material to enhance its impact resistance. However, this method increases mold weight and cost and cannot completely prevent damage caused by deformation. Second, using fixed welding fixtures to rigidly fix the grounding wire and reduce deformation. However, such fixtures are bulky, inconvenient to carry, and difficult to adapt to uneven outdoor construction environments. Furthermore, existing technologies largely rely on manual adjustment to address the difficulty in aligning the welded joints, resulting in low efficiency and difficulty in guaranteeing accuracy.

[0004] The shortcomings of existing technologies: While increasing mold thickness or improving materials can partially alleviate deformation problems, they cannot fundamentally solve the wire bending caused by high-temperature stress release, and they also increase cost and weight. Using fixed welding fixtures can reduce deformation, but their bulky structure and limited adaptability restrict their application in field construction. Manually adjusting the alignment of welding joints is inefficient and makes it difficult to guarantee the consistency of welding quality. Utility Model Content

[0005] In view of this, the present invention aims to provide a grounding wire aluminothermic welding fixture to solve the above problems.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0007] A grounding wire aluminothermic welding fixture includes a bracket, which is supported by at least three height-adjustable legs, and a mold is provided on the bracket;

[0008] The mold is provided with a welding cavity and a first through hole for the welding head of the grounding wire to be welded to extend into. The first through hole is connected to the welding cavity. The number of first through holes is the same as the number of grounding wires to be welded. The position of the first through hole relative to the welding cavity corresponds to the welding connection form of the grounding wire. A feeding cavity is opened on the top surface of the mold. A material dropping channel is opened at the bottom of the feeding cavity and is connected to the welding cavity.

[0009] The welding cavity is provided with a welding block, and the welding block is provided with the same number of second wire holes as the first wire holes, so that each first wire hole corresponds to and is connected to a second wire hole.

[0010] The bracket has a fixture on the outside of the mold corresponding to each first wire hole to fix the grounding wire to be welded. The fixture includes a base and a fixing member, wherein the base is installed on the bracket and the fixing member corresponds to the first wire hole and is installed on the base.

[0011] Furthermore, the mold includes a lower mold and an upper mold, the welding cavity is formed by the engagement of receiving grooves that are directly opposite each other on the top surface of the lower mold and the bottom surface of the upper mold, and the first threading hole is formed by the engagement of a wire groove that is directly opposite each other on the top surface of the lower mold and the bottom surface of the upper mold.

[0012] Furthermore, the mold is made of graphite.

[0013] Furthermore, the support includes a cross beam, which is composed of cross beams and longitudinal beams arranged in a cross shape, forming four beam arms. A first groove is opened on the top surface of each beam arm along the length of the beam arm, and a second groove is opened on the side surface of the beam arm along the length of the beam arm. The second groove is connected to the first groove.

[0014] The mold is located at the center of the cross beam, and the first threading hole of the mold corresponds to a beam arm. The mold is clamped and fixed by four clamping blocks, which are located on the four beam arms and are slidably disposed in the first groove.

[0015] The base of the clamp is slidably disposed in the first groove of the corresponding beam arm;

[0016] The clamping block and the base are respectively matched with set screws. The set screws pass through the second slide groove and extend into the first slide groove. The clamping block and the base are fixed in the first slide groove by the set screws pressing against them.

[0017] The outriggers are provided in four parts, located at the far ends of the four beam arms.

[0018] Furthermore, the crossbeam is an integral beam structure, and the longitudinal beam is a split structure, including two longitudinal beam segments. The two longitudinal beam segments are respectively located on both sides of the crossbeam. The corresponding longitudinal beam segments on the left and right sides of the crossbeam are respectively provided with snap-fit ​​grooves at a certain distance from the bottom surface of the integral beam. The snap-fit ​​grooves are T-shaped grooves or dovetail grooves, and the snap-fit ​​grooves extend upward through the top surface of the crossbeam.

[0019] The near ends of the two longitudinal beam segments are respectively provided with corresponding snap-fit ​​slots with snap-fit ​​parts. The snap-fit ​​parts are inserted into the snap-fit ​​slots so that the near ends of the longitudinal beam segments are supported by the snap-fit ​​slots. The far ends of the two longitudinal beam segments and the two ends of the crossbeam are respectively connected by detachable connecting plates.

[0020] Furthermore, the fastener is a ring-shaped buckle.

[0021] Furthermore, the inner wall of the annular buckle is provided with a high-temperature resistant ceramic liner.

[0022] Furthermore, the welding block is made of copper.

[0023] Furthermore, the support leg is a bolt structure with the head facing down and the screw facing forward, and the support leg and the bracket are threaded together.

[0024] Compared with existing technologies, the grounding wire aluminothermic welding fixture of this utility model has the following advantages:

[0025] (1) In this utility model, the height of the legs on the support can be adjusted, which can quickly level the support and facilitate the alignment of the grounding wire welding head, thus solving the problems of difficult alignment of welding head and low operation efficiency in field construction.

[0026] (2) In this utility model, the bracket adopts a detachable cross beam structure, and the mold can be detached and installed on the bracket, which facilitates the overall assembly and disassembly of the device and improves the convenience of storage and transportation of the device.

[0027] (3) In this utility model, each first wire hole is provided with a clamp, and the grounding wire is clamped and fixed by the clamp, which solves the problem of deformation of the grounding wire caused by high temperature stress release during aluminothermic welding, and thus solves the problem of cracking of the welding mold or damage to the welding chamber caused by wire deformation. Attached Figure Description

[0028] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments and descriptions of the utility model are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Grounding wire welding connection configuration.

[0029] Figure 1 This is a three-dimensional view of the grounding wire aluminothermic welding fixture described in this embodiment;

[0030] Figure 2This is a schematic diagram of the support structure in the grounding wire aluminothermic welding fixture described in this embodiment;

[0031] Figure 3 This is a structural diagram of the mold corresponding to the cross-shaped aluminothermic welding of the four grounding wire welding heads in Embodiment 1 of this utility model;

[0032] Figure 4 This is a perspective view of the cross-shaped welding block used in the cross-shaped welding of Example 1;

[0033] Figure 5 This is a diagram showing the arrangement of the second wire hole inside the cross-shaped welding block in Example 1;

[0034] Figure 6 This is a structural diagram of the mold corresponding to the T-shaped aluminothermic welding of the three grounding wire welding head in Embodiment 1 of this utility model;

[0035] Figure 7 This is a perspective view of the T-shaped welding block used in T-shaped welding in Example 2;

[0036] Figure 8 This is a diagram showing the arrangement of the second wire hole inside the T-shaped welding block in Example 2;

[0037] Figure 9 This is a structural diagram of the mold corresponding to the I-shaped aluminothermic welding of the two grounding wire welding head in Embodiment 3 of this utility model;

[0038] Figure 10 This is a perspective view of the straight welding block used in the straight welding of Example 3;

[0039] Figure 11 This is a diagram showing the arrangement of the second wire hole inside the I-shaped welding block in Example 3;

[0040] Figure 12 This is a schematic diagram of the beam structure in this embodiment.

[0041] Figure 13 This is a schematic diagram of the longitudinal beam segment structure in this embodiment;

[0042] Figure 14 This is a three-dimensional view of the welding grounding wire state of the aluminothermic welding fixture described in this embodiment;

[0043] Figure 15 A schematic diagram of a T-beam structure for the support frame;

[0044] Figure 16 This is a diagram showing the state of the mold supported by a T-beam structure.

[0045] Explanation of reference numerals in the attached figures:

[0046] 1-Bracket; 101-Beam arm; 102-Connecting plate; 103-First slide groove; 104-Second slide groove; 105-Snap-fit ​​groove; 106-Snap-fit ​​part; 107-Crossbeam; 108-Longitudinal beam section; 2-Mold; 21-Lower mold; 22-Upper mold; 23-Feeding cavity; 24-First wire hole; 25-Welding cavity; 26-Discharge channel; 3-Grounding wire; 4-Clamping fixture; 41-Fixing component; 42-Base; 5-Clamping block; 6-Support leg; 7-Set screw; 81-Cross-shaped welding block; 82-T-shaped welding block; 83-Straight welding block; 84-Second wire hole; 9-Fixing pin. Detailed Implementation

[0047] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0048] like Figure 1 As shown, a grounding wire aluminothermic welding fixture includes a support 1, which is supported by at least three height-adjustable legs 6, forming a support platform for a mold. A mold 2 is mounted on the support 1. The legs 6 are preferably bolted structures with their heads facing downwards and their screws pointing upwards, and are threadedly connected to the support 1. This structure allows for adjustment of the support height of each leg 6 according to the welding site conditions, quickly adjusting the support 1 to a horizontal support state. This facilitates the alignment of the grounding wire welding head for aluminothermic welding, solving the problems of difficult welding head alignment and low operational efficiency in field construction.

[0049] The mold 2 is preferably made of graphite and has a cuboid structure. It is clamped and fixed by four clamping blocks 5. The mold 2 has a welding cavity inside and a feeding cavity 23 connected to the welding cavity on the top surface. The mold 2 has a first threading hole 24 for the grounding wire welding head to be inserted on the side. The first threading hole 24 is connected to the welding cavity. The number of first threading holes 24 is the same as the number of grounding wires to be welded. The position of the first threading hole 24 relative to the welding cavity corresponds to the welding connection form of the grounding wire. The bracket 1 is provided with two clamps 4 on the outside of the mold corresponding to each first threading hole 24. The two clamps 4 are arranged one in front of the other along the axial direction of the first threading hole 24. Each clamp 4 includes a base 42 and a fixing member 41. The base 42 is slidably installed on the bracket 1 along the axial direction of the first threading hole 24. The fixing member 41 is made of stainless steel, installed on the base 42, and corresponds to the first threading hole 24. Preferably, the fixing component 41 is a ring-shaped buckle with a high-temperature resistant ceramic liner on its inner wall. The ring-shaped buckle is opened and closed by a pull buckle, which facilitates the clamping and fixing of the grounding wire 3 to prevent the grounding wire 3 from twisting and deforming during welding. The ring-shaped buckle structure of the fixing component also makes it easy to remove the clamped grounding wire 3 after welding. The fixing component 41 can also be other pipe clamp structures, or a three-jaw self-centering structure or a V-shaped structure. The welding heads of the several grounding wires 3 to be welded are gathered in the welding cavity after passing through the corresponding first wire hole 24. Each grounding wire is fixed by its corresponding clamp 4. At this time, the grounding wire 3 is positioned by the mold 2 and the fixing component 41, which effectively suppresses the lateral force generated by thermal deformation. At the same time, the expansion force of the molten metal during welding is evenly transmitted to the support platform for overall absorption through the clamp, which effectively solves the deformation problems of the grounding wire caused by high temperature stress release during aluminothermic welding, such as twisting and large-angle bending, and thus the problem of cracking or damage to the welding mold caused by wire deformation.

[0050] The grounding wire 3 is usually made of copper wire. Therefore, the welding block used for aluminothermic welding of its welding head is a copper component that matches the material of the grounding wire. The welding block is provided with a second wire hole 84 for the corresponding grounding wire welding head. The number of second wire holes 84 is the same as the number of first wiring holes 24 of mold 2. The positional relationship between the second wire holes 84 must be able to ensure that after the welding block is placed in the welding cavity, each first wire hole 24 of mold 2 corresponds to and is connected to a second wire hole 84. This ensures that the welding heads of the grounding wires to be welded are inserted into the second wire holes 84 through the first wire holes 24 and gathered in the welding block to carry out the aluminothermic welding operation.

[0051] The aluminothermic welding pattern of the grounding wire is determined by the number of grounding wires, and is generally divided into three types: four grounding wires are welded in a cross shape, three grounding wires are welded in a T shape, and two grounding wires are welded in a straight line. The welding pattern of the grounding wire determines the welding cavity structure of the mold and the number of the first wiring holes 24, and also determines the specific structure of the welding block. The molds and welding blocks corresponding to the above three welding patterns are described below:

[0052] Example 1: The welding block used for cross-shaped welding of four grounding wires is cross-shaped welding block 81, such as... Figure 4 As shown, the cross-shaped welding block 81 is provided with four second wire-passing holes 84, as... Figure 4 , Figure 5 As shown, the four second wire-passing holes 84 are located on the same horizontal plane and distributed on the front, back, left, and right sides of the cross-shaped welding block 81. The structure of the mold 2 used for cross-shaped welding of the four grounding wires is as follows. Figure 3 As shown, the welding cavity 25 and the cross-shaped welding block 81 are correspondingly arranged in the mold 2. The mold 2 has four first wire-passing holes 24. Similarly, the four first wire-passing holes 24 are located on the same horizontal plane and distributed on the four sides of the mold 2. The first wire-passing holes 24 are connected to the welding cavity 25. A material discharge channel 26 is opened at the bottom of the feeding cavity 23 to connect the feeding cavity 23 and the welding cavity 25. After the cross-shaped welding block 81 is placed in the welding cavity 25, each first wire-passing hole 24 corresponds to and is connected to a second wire-passing hole 84, so that each grounding wire welding head can be inserted into the second wire-passing hole 84 after passing through the first wire-passing hole 24. The four grounding wire welding heads finally converge in the cross-shaped welding block 81.

[0053] Example 2: The welding block used for T-shaped welding of three grounding wires is T-shaped welding block 82, such as... Figure 7 As shown, the T-shaped welding block 82 is provided with three second wire-passing holes 84, as... Figure 7 , Figure 8 As shown, the three second wire-passing holes 84 are located on the same horizontal plane and distributed on the front, left, and right sides of the T-shaped welding block 82. The structure of the mold 2 used for welding the three grounding wires in a T-shape is as follows. Figure 6 As shown, the welding cavity 25 and T-shaped welding block 82 are correspondingly arranged in the mold 2. The mold 2 has three first wire-passing holes 24, which are located on the same horizontal plane and distributed on the front, left, and right sides of the mold 2. The first wire-passing holes 24 are connected to the welding cavity 25. A material discharge channel 26 is opened at the bottom of the feeding cavity 23 to connect the feeding cavity 23 and the welding cavity 25. After the T-shaped welding block 82 is placed in the welding cavity 25, each first wire-passing hole 24 corresponds to and is connected to a second wire-passing hole 84, so that each grounding wire welding head can be inserted into the second wire-passing hole 84 after passing through the first wire-passing hole 24. The three grounding wire welding heads finally converge in the T-shaped welding block 82.

[0054] Example 3: The welding block used for the straight-line welding of the two grounding wires is a straight-line welding block 83, such as... Figure 10 As shown, the straight welding block 83 is provided with two second wire-passing holes 84, as... Figure 10 , Figure 11As shown, the two second wire-passing holes 84 are located in the same horizontal plane and distributed on the left and right sides of the I-shaped welding block 83. The structure of the mold 2 for welding the two grounding wires in an I-shape is as follows. Figure 9 As shown, the welding cavity 25 and the straight welding block 83 are correspondingly arranged in the mold 2. The mold 2 has two first wire-passing holes 24, which are located on the same horizontal plane and distributed on the left and right sides of the mold 2. The first wire-passing holes 24 are connected to the welding cavity 25. A material discharge channel 26 is opened at the bottom of the feeding cavity 23 to connect the feeding cavity 23 and the welding cavity 25. After the straight welding block 83 is placed in the welding cavity 25, each first wire-passing hole 24 corresponds to and is connected to a second wire-passing hole 84, so that each grounding wire welding head can be inserted into the second wire-passing hole 84 after passing through the first wire-passing hole 24. The two grounding wire welding heads finally converge in the straight welding block 83.

[0055] In this invention, the mold 2 adopts a split structure, including an upper mold 22 and a lower mold 21. The lower mold 21 is clamped and fixed to the bracket 1 by four clamping blocks 5. The upper mold 22 is fastened onto the lower mold 21, with the bottom surface of the upper mold 22 and the top surface of the lower mold 21 in close contact. The feeding cavity 23 is located on the top surface of the upper mold 22. During welding, a clamping device or a pressing mechanism is used to clamp or press the upper mold 22 and the lower mold 21 together. The welding cavity 25 is formed by the fastening of the receiving grooves that are directly opposite each other on the top surface of the lower mold 21 and the bottom surface of the upper mold 22. The first wire hole 24 is formed by the fastening of the wire grooves that are directly opposite each other on the top surface of the lower mold 21 and the bottom surface of the upper mold 22. This structure facilitates the opening of the mold 2 after welding, allowing the welded grounding wire and the support platform to be separated.

[0056] In this utility model, the structure of the bracket 1 is as follows: Figure 2 As shown, the cross beam consists of crossbeams 107 and longitudinal beams arranged in a cross shape, forming four beam arms 101. Each beam arm 101 has a first groove 103 on its top surface along its length. The first groove 103 is preferably a dovetail groove structure. A second groove 104 is formed on the side of each beam arm 101 along its length, and the second groove 104 communicates with the first groove 103. A mold 2 is positioned at the center of the cross beam. (See attached image.) Figure 1 Each of the first threading holes 24 of the mold 2 corresponds to a beam arm 101. The four clamping blocks 5 that fix the mold 2 are respectively disposed on the four beam arms 101 and are all slidably disposed in the first slide groove 103. The base 42 of the clamp 4 is slidably disposed in the first slide groove 103 corresponding to the beam arm 101. The clamping blocks 5 and the base 42 are respectively matched with set screws 7. The set screws 7 pass through the second slide groove 104 and extend into the first slide groove 103. The clamping blocks 5 and the base 42 are respectively fixed in the first slide groove 103 by the set screws 7. Preferably, there are 4 legs 6, which are disposed at the far ends of the four beam arms 101 (the ends of the beam arms away from the center of the cross beam).

[0057] In this utility model, the crossbeam 107 is an integral beam structure, while the longitudinal beams are split structures, including two longitudinal beam segments 108, which are respectively disposed on both sides of the crossbeam 107. The structure of the crossbeam 107 is as follows: Figure 12 As shown, corresponding longitudinal beam segments 108 at a certain distance from the bottom surface of the overall beam have snap-fit ​​grooves 105. The snap-fit ​​grooves 105 are T-shaped or dovetail grooves, extending upwards through the top surface of the transverse beam 107. The structure of the longitudinal beam segment 108 is as follows: Figure 13 As shown, each longitudinal beam segment 108 has a corresponding locking part 106 at its proximal end (the end immediately adjacent to the center of the crossbeam) and a corresponding locking groove 105. During assembly, the locking part 106 is inserted into the locking groove 105, at which point the proximal end of the longitudinal beam segment 108 is supported by the locking groove 105. The distal ends of the two longitudinal beam segments 108 and the two ends of the crossbeam 107 are connected by detachable connecting plates 102, that is, the distal ends of every two adjacent beam arms 101 are detachably connected to connecting plates. For example, fixing pins 9 or screws can be used to connect and fix the connecting plates 102 and the beam arms 101.

[0058] The bracket adopts the above structure, which allows for quick assembly and disassembly, improving its portability, and also allows for modification as needed, such as:

[0059] When performing aluminothermic welding on the four grounding wires 3, it is necessary to use... Figure 2 The bracket shown includes a crossbeam structure. In this case, the two longitudinal beam segments 108 of the crossbeam are installed on both sides of the crossbeam 107. The mold 2 is clamped and fixed by four clamping blocks 5. Figure 14 As shown, four grounding wires 3 are distributed on the four sides of the mold 2. The welding heads of the four grounding wires 3 are inserted into the mold 2 through the first wire hole 24 and converge in the cross-shaped welding block 81. Each grounding wire 3 is clamped and fixed by the fixing parts 41 of the two clamps 4. The aluminum powder and metal oxide required for the aluminothermic reaction are poured into the feeding chamber 23 of the mold 2. The aluminum powder and metal oxide fall onto the top surface of the cross-shaped welding block 81 through the dropping channel 26. At this time, the aluminothermic welding operation can be carried out using a heat source. The principle and specific welding process of aluminothermic welding are existing technologies and will not be described in detail here.

[0060] When performing a T-shaped weld on three grounding wires or a straight weld on two grounding wires, the following method can be used: Figure 2 The support shown includes a crossbeam structure, and alternatively, a different type of support can be selected. Figure 15 The bracket shown includes a T-beam structure. In this case, one longitudinal beam segment 108 is omitted; only one longitudinal beam segment 108 is used and installed on one side of the crossbeam 107 to form a T-beam structure with three beam arms 101. The molds 2 used for T-shaped welding or straight welding each have three clamping blocks 5 corresponding to their respective three beam arms 101. The molds 2 are clamped by two clamping blocks 5 on the crossbeam 107. Figure 16As shown, the clamping block 5 of the longitudinal beam segment 108 fits against the mold 2, limiting the position of the mold 2 relative to the longitudinal beam segment 108. When three grounding wires are T-shaped welded, the mold 2 should be placed to ensure that the two first wire holes 24 on its left and right sides correspond to the crossbeam 107, and the first wire hole 24 on the front corresponds to the longitudinal beam segment 108. When two grounding wires are I-shaped welded, the mold 2 should be placed to ensure that the two first wire holes 24 on its left and right sides correspond to the crossbeam 107. When three grounding wires are T-shaped welded or two grounding wires are I-shaped welded, each grounding wire is also clamped and fixed by two clamps 4 to prevent bending deformation of the grounding wire due to high-temperature stress release during aluminothermic welding.

[0061] The grounding wire aluminothermic welding fixture of this utility model is flexible in use and easy to carry. It is suitable for field aluminothermic welding of grounding wires and can solve the deformation problem caused by high temperature stress release during aluminothermic welding of grounding wires. It has good market prospects.

[0062] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A grounding wire aluminothermic welding fixture, characterized in that: Includes a bracket (1), which is supported by at least three height-adjustable legs (6), and a mold (2) is provided on the bracket (1); The mold (2) is provided with a welding cavity (25) and a first through hole (24) for the welding head of the grounding wire to be welded to extend into. The first through hole (24) and the welding cavity (25) are connected. The number of first through holes (24) is the same as the number of grounding wires to be welded. The position of the first through hole (24) relative to the welding cavity (25) corresponds to the welding connection form of the grounding wire. The top surface of the mold (2) is provided with a feeding cavity (23). The bottom of the feeding cavity (23) is provided with a material discharge channel (26) which is connected to the welding cavity (25). Welding blocks are provided inside the welding cavity (25), and the welding blocks are provided with the same number of second wire holes (84) as the first wire hole (24), so that each first wire hole (24) corresponds to and is connected to a second wire hole (84). The bracket (1) is provided with a clamp (4) for fixing the grounding wire to be welded to each first wire hole (24) on the outside of the mold (2). The clamp (4) includes a base (42) and a fixing member (41). The base (42) is installed on the bracket (1), and the fixing member (41) corresponds to the first wire hole (24) and is installed on the base (42).

2. The grounding wire aluminothermic welding fixture according to claim 1, characterized in that: The mold (2) includes a lower mold (21) and an upper mold (22). The welding cavity (25) is formed by the fastening of the receiving grooves that are directly opposite each other on the top surface of the lower mold (21) and the bottom surface of the upper mold (22). The first wire hole (24) is formed by the fastening of the wire grooves that are directly opposite each other on the top surface of the lower mold (21) and the bottom surface of the upper mold (22).

3. The grounding wire aluminothermic welding fixture according to claim 2, characterized in that: The mold (2) is a graphite part.

4. A grounding wire aluminothermic welding fixture according to claim 1, 2, or 3, characterized in that: The bracket (1) includes a cross beam, which is composed of cross beams (107) and longitudinal beams arranged in a cross shape, forming four beam arms (101). Each beam arm (101) has a first groove (103) on its top surface along the length of the beam arm, and a second groove (104) on its side along the length of the beam arm. The second groove (104) and the first groove (103) are connected. The mold (2) is set at the center of the cross beam, and the first thread hole (24) of the mold (2) corresponds to a beam arm (101). The mold (2) is clamped and fixed by four clamping blocks (5). The four clamping blocks (5) are respectively set in the four beam arms (101) and are all slidably set in the first groove (103). The base (42) of the clamp (4) is slidably disposed in the first groove (103) of the corresponding beam arm (101); The clamping block (5) and the base (42) are respectively matched with set screws (7). The set screws (7) pass through the second slide groove (104) and extend into the first slide groove (103). The clamping block (5) and the base (42) are pressed and fixed in the first slide groove (103) by the set screws (7). The outriggers (6) are provided in four parts, which are located at the far ends of the four beam arms (101).

5. The grounding wire aluminothermic welding fixture according to claim 4, characterized in that: The crossbeam (107) is an integral beam structure, and the longitudinal beam is a split structure, including two longitudinal beam segments (108). The two longitudinal beam segments (108) are respectively located on both sides of the crossbeam (107). The corresponding longitudinal beam segments (108) on the left and right sides of the crossbeam (107) at a certain distance from the bottom surface of the integral beam are respectively provided with snap-fit ​​grooves (105). The snap-fit ​​grooves (105) are T-shaped grooves or dovetail grooves. The snap-fit ​​grooves (105) extend upward through the top surface of the crossbeam (107). The two longitudinal beam segments (108) are respectively provided with corresponding snap-fit ​​grooves (105) at their proximal ends, and the snap-fit ​​parts (106) are inserted into the snap-fit ​​grooves (105) so that the proximal ends of the longitudinal beam segments (108) are supported by the snap-fit ​​grooves (105). The distal ends of the two longitudinal beam segments (108) and the two ends of the crossbeam (107) are respectively connected by detachable connecting plates (102).

6. The grounding wire aluminothermic welding fixture according to claim 1, characterized in that: The fastener (41) is a ring buckle.

7. The grounding wire aluminothermic welding fixture according to claim 6, characterized in that: The inner wall of the annular buckle is provided with a high-temperature resistant ceramic liner.

8. The grounding wire aluminothermic welding fixture according to claim 1, characterized in that: The welding block is made of copper.

9. The grounding wire aluminothermic welding fixture according to claim 1, characterized in that: The support leg (6) is a bolt structure with the head facing down and the screw facing up, and the support leg (6) and the bracket (1) are threaded together.

Images