Clamp and method for tube bus outer hoop tube joint welding

Abstract

The application discloses a clamp and method for joint welding of a pipe-type bus outer hoop pipe, and belongs to the technical field of electrical pipe welding, and is mainly used for assisting joint welding of a pipe-type bus outer hoop pipe. The application aims to provide a clamp for joint welding of a pipe-type bus outer hoop pipe, which comprises a clamping assembly and connecting bolts. The clamping assembly comprises a main steel plate and a connecting plate assembly connected with the main steel plate. The clamping section of the main steel plate is concavely provided with a semicircular bayonet and an operation notch. The two semicircular bayonets enclose a clamping cavity for clamping the outer hoop pipe. The two operation notches enclose an operation cavity for welding a straight seam of the outer hoop pipe. The width of the operation cavity is greater than the width of the straight seam of the outer hoop pipe. The application also provides a method for joint welding of a pipe-type bus outer hoop pipe, which utilizes the above clamp to assist in clamping and welding. The clamp and method are suitable for joint welding of a pipe-type bus outer hoop pipe, have small clamping volume, are suitable for various construction environments, can ensure uniform annular holding force on the outer hoop pipe, and can ensure joint welding quality.

Description

Technical Field

[0001] This invention relates to the field of electrical conduit welding technology, and in particular to a fixture and method for assisting in the welding of the outer coupling of a tubular busbar. Background Technology

[0002] Due to limitations in the fabrication and transportation of tubular busbars, on-site installation and connection are necessary after delivery. Before welding, the tubular busbar joints 21 to be connected must be inserted into the outer clamping pipe 1 with the straight seam 13 to ensure alignment and tight connection of the tubular busbar joints 21. Figure 1 As shown in (a), the outer clamp 1 consists of a straight-seam connecting sleeve 11 and a straight-seam conductive copper sleeve 12. The straight-seam conductive copper sleeve 12 is fitted over the straight-seam connecting sleeve 11, and their straight seams 13 are aligned. Figure 1 (b) Figure 1 As shown in (c), the end of the tubular busbar 2 to be connected, away from the tubular busbar joint 21, is fitted with a heat-shrinkable insulating tube 22. The tubular busbar joint 21 is inserted into the connecting sleeve 11 of the outer clamp tube 1, and then the outer clamp tube 1 is welded together. In order to ensure that the circuit resistance, voltage drop and mechanical strength at the tubular busbar joint 21 meet the technical requirements, and to obtain an ideal welding effect when the outer clamp tube of the tubular busbar is welded together, the outer wall of the outer clamp tube must obtain a uniform force pointing towards the core of the tube joint. Through the gripping force of the outer clamp tube, the inner wall of the conduit of the straight seam connecting sleeve and the outer wall of the tubular busbar are made into close contact.

[0003] Existing auxiliary devices for welding tubular busbars, such as the installation auxiliary device described in CN219123884U "A Novel Tubular Busbar Connection Device and Installation Auxiliary Device", include a frame structure, a drive structure, and a clamping structure. The clamping structure includes a first sliding block and a second sliding block. The inner side of the first sliding block has a first arc-shaped groove, and the inner side of the second sliding block has a second arc-shaped groove. The first arc-shaped groove is used to place an upper arc-shaped piece, and the second arc-shaped groove is used to place a lower arc-shaped piece. The tubular busbar to be installed is placed between the first and second arc-shaped grooves. The frame structure includes a base plate and side plates. The side plates are arranged on both sides of the base plate, and a bottom opening is formed in the middle of the base plate. A sliding groove is formed on the side plates, and a first support rod and a second support rod are erected between the two side plates. The drive structure includes a lever, a first support rod, and a second support rod. The actuating rod comprises a first driving rod, a second driving rod, a transverse linkage rod, a third driving rod, and a fourth driving rod. The actuating rod has a first driving rod that is obliquely fixedly connected, and the first driving rod is hinged to one end of the second driving rod. The other end of the second driving rod is hinged to a first sliding block. The two sides of the first sliding block are slidably disposed in the groove portion via limiting sliders. The bottom of the actuating rod is provided with the transverse linkage rod, one end of which is hinged to the third driving rod. The third driving rod has a bent structure, and the bent part of the third driving rod is rotatably disposed on a second support rod. The two ends of the second support rod are fixed to the side plate. One end of the third driving rod is hinged to the fourth driving rod, and the fourth driving rod is hinged to the second sliding block. The two sides of the second sliding block are slidably disposed in the groove portion via limiting sliders. Alternatively, refer to CN217913537U "A Seam Joining Mechanism for an Integrated Steel Pipe Seam Welding Machine" for describing a seam joining mechanism for an integrated steel pipe seam welding machine. This mechanism is used for seam welding of steel pipes and includes a support frame with a vertical pushing member mounted on it; a welding assembly comprising a welding support frame, a welding head, and an abutment member, wherein the welding head and the abutment member are mounted on the welding support frame, the abutment member is positioned below the welding head, and the abutment member has an abutment portion opposite to the welding head, forming a welding space for the steel pipe between the abutment portion and the welding head; and a rotating pushing member connected to both the welding support frame and the vertical pushing member, wherein the welding support frame is hinged to the vertical pushing member, and the rotating pushing member can drive the welding support frame to rotate up and down around the vertical pushing member.

[0004] Both of the aforementioned devices for pipe joint welding are complex in structure, large in size, and heavy in weight, making them unsuitable for the joint welding of external couplings of tubular busbars in situations where there is no working platform, welding angle requirements, narrow space, or high-altitude operations. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a clamp and method for welding the outer clamp of a tubular busbar. It is mainly used to assist in the welding of the outer clamp of a tubular busbar, so as to achieve small size, suitability for various construction environments, and ensure that it generates a uniform circumferential gripping force on the outer clamp, thereby ensuring the quality of the welding.

[0006] This invention discloses a clamp for welding the outer coupling of a tubular busbar, comprising two symmetrically arranged clamping assemblies and a connecting bolt disposed between the two clamping assemblies. Each clamping assembly includes two parallel main steel plates, each main steel plate comprising a connecting section and a clamping section arranged from top to bottom. The clamping section has a semi-circular notch for clamping the outer coupling, and also has an operating slot located above the semi-circular notch and connected to the connecting section. The operating slot is strip-shaped. Below the semi-circular notch, there is a downwardly extending extension section. A connecting bolt is provided between the two main steel plates for connecting the main steel plates. The plate assembly includes a vertically arranged first connecting plate and a second connecting plate. The first connecting plate is disposed between the connecting sections of the two main steel plates, and the second connecting plate is disposed between the extension sections of the two main steel plates. Both the first and second connecting plates have threaded holes for threaded connection with connecting screws. The semi-circular bayonets of the two symmetrically arranged clamping components form a clamping cavity for clamping the outer hoop tube. The operating slots of the two symmetrically arranged clamping components form an operating cavity for welding the straight seam of the outer hoop tube. The width of the operating cavity is greater than the width of the straight seam of the outer hoop tube.

[0007] Furthermore, the connecting plate assembly also includes a first reinforcing rib and a second reinforcing rib. The first reinforcing rib is laterally disposed below the first connecting plate and above the operating slot. The second reinforcing rib is disposed on the clamping section and is inclined towards the center of the semi-circular notch between the two main steel plates for connecting the main steel plates.

[0008] As a preferred embodiment, at least two first reinforcing ribs are evenly spaced at the operating slot, and at least two second reinforcing ribs are spaced at the semi-circular notch.

[0009] Furthermore, the angle between the straight line of the connecting segment facing the other clamping component and the perpendicular line of the center of the semicircular bayonet is 4°-5°; the angle between the straight line of the extension segment facing the other clamping component and the perpendicular line of the center of the semicircular bayonet is 4°-5°.

[0010] Furthermore, the threaded hole is an elongated threaded hole.

[0011] Furthermore, a flame-retardant insulating shield is provided on the side of the operating slot facing the other clamping component.

[0012] Furthermore, the main steel plate is spoon-shaped, and the two clamping components are connected by connecting bolts to form a pipa-shaped clamping structure.

[0013] Furthermore, the connecting bolt includes a screw, a galvanized flat washer, a galvanized spring washer, and a nut, wherein the screw passes through a threaded hole and is sequentially connected to the galvanized flat washer, the galvanized spring washer, and the nut.

[0014] This invention also discloses a method for welding the outer clamp of a tubular busbar, including...

[0015] Step 1: Connect the tubular busbar to the outer clamp pipe;

[0016] The outer hoop tube is provided with a straight slit along the length of the outer hoop tube, and the joints of the two tubular busbars are inserted into the outer hoop tube relative to each other;

[0017] Step 2: Clamp the clamp for welding the outer coupling of the tubular busbar as described in any of the above items onto the outer coupling.

[0018] First, the semi-circular jaws of the main steel plate of one set of clamping components are fitted onto the outer hoop tube to be welded. Then, the semi-circular jaws of the main steel plate of another set of clamping components are fitted onto the opposite side of the outer hoop tube to be welded. The outer hoop tube is located in the clamping cavity. Then, the connecting bolts are passed through the threaded holes on the first connecting plate and the threaded holes on the second connecting plate of the two sets of clamping components to clamp the two clamping components onto the outer hoop tube.

[0019] Step 3: Rotate the clamp for welding the outer hoop or the outer hoop of the tubular busbar so that the straight seam of the outer hoop is located in the operating chamber;

[0020] Step 4: Tighten the connecting bolts until the straight seam of the outer clamp is closed;

[0021] Step 5: Weld the straight seam of the outer hoop pipe by inserting the arc welding rod into the outer hoop pipe from the operating chamber to perform the seam welding;

[0022] Step 6: Remove the clamps used for welding the outer clamp of the tubular busbar.

[0023] Furthermore, after step three, the method also includes synchronously rotating the clamp for welding the outer clamp of the outer clamp and the outer clamp of the busbar, and adjusting the angle of the welding.

[0024] The beneficial effects of this invention are: the tubular busbar outer clamp welding fixture is lightweight, small in size, easy to transport, and suitable for high-altitude operations. It also has a simple structure, simple manufacturing process, saves manufacturing costs, and can be reused repeatedly. It is applicable to various complex environments and 360° straight seam steel pipe welding perpendicular to the weld direction. By rotating the welding angle to adjust to the optimal operating space, it overcomes the limited space restricting the spacing of tubular busbars, improving the welding quality and efficiency.

[0025] The method for welding the outer clamp of the tubular busbar utilizes the aforementioned clamp for welding the outer clamp of the tubular busbar. Its working principle is simple and easy to operate. Operators can adjust and tighten the connecting bolts according to the condition of the outer clamp to be welded, control the weld width and tightening force to ensure welding quality, and ensure that the clamp after welding generates sufficient pre-stressed gripping pressure between the connecting sleeve and the tubular busbar joint, ensuring that the circuit resistance between the connecting sleeve and the tubular busbar meets the relevant technical specifications of the product. Attached Figure Description

[0026] Figure 1 : Schematic diagram of the welding process for tubular busbars; where, Figure 1 (a) is a schematic diagram of the splicing of the outer clamp pipe; Figure 1 (b) is a schematic diagram of a tubular busbar fitted with a heat-shrinkable insulating tube being inserted into an outer clamp tube; Figure 1 (c) is a schematic diagram of the tubular busbar after the outer hoop pipe is inserted;

[0027] Figure 2 : A schematic diagram of the fixture's structure;

[0028] Figure 3 : Connection diagram of the clamping assembly;

[0029] Figure 4 Schematic diagram of the main steel plate;

[0030] Figure 5 : Schematic diagram of the clamping assembly holding the outer clamp tube;

[0031] Figure 6 : A schematic diagram of the clamp being vertically held onto the outer hoop pipe using this clamp;

[0032] Figure 7 : A schematic diagram of the clamp being used to horizontally hold the outer hoop pipe;

[0033] Reference numerals: 1-Outer hoop; 11-Connecting sleeve; 12-Conductive copper sleeve; 13-Straight seam; 2-Tube busbar; 21-Tube busbar connector; 22-Heat shrinkable insulating tubing; 3-Clamping assembly; 31-Main steel plate; 311-Connecting section; 3111-Upper straight edge; 312-Clamping section; 3121-Semi-circular bayonet; 3122-Operating slot; 3123-Extension section; 3124-Lower straight edge; 3125-Flame retardant insulation Edge shield; 3126-Internal threaded hole; 3127-Flat head screw; 32-Connecting plate assembly; 321-First connecting plate; 322-Second connecting plate; 323-First reinforcing rib plate; 324-Second reinforcing rib plate; 325-Threaded hole; 4-Connecting bolt; 41-Screw; 42-Galvanized flat washer; 43-Galvanized spring washer; 44-Nut; 5-Operating cavity; 6-Clamping cavity; 7-Perpendicular line BE of the center O of the semi-circular bayonet. Detailed Implementation

[0034] The present invention will be further described below.

[0035] This invention provides a clamp for welding the outer coupling of a tubular busbar 2, mainly used to assist in the welding of the outer coupling of a tubular busbar. It includes two symmetrically arranged clamping components 3 and a connecting bolt 4 disposed between the two clamping components 3. Each clamping component 3 includes two parallel main steel plates 31. Each main steel plate 31 includes a connecting section 311 and a clamping section 312 arranged from top to bottom. The clamping section 312 has a semi-circular notch 3121 recessed for clamping the outer coupling 1. The clamping section 312 also has an operating slot 3122 located above the semi-circular notch 3121 and connected to the connecting section 311. The operating slot 3122 is strip-shaped. Below the semi-circular notch 3121, there is a downwardly extending extension section 3123. A connection is provided between the two main steel plates 31 for... A connecting plate assembly 32 connecting the main steel plate 31 includes a vertically arranged first connecting plate 321 and a second connecting plate 322. The first connecting plate 321 is disposed between the connecting sections 311 of the two main steel plates 31, and the second connecting plate 322 is disposed between the extension sections 3123 of the two main steel plates 31. Both the first connecting plate 321 and the second connecting plate 322 are provided with threaded holes 325 for threaded connection with connecting bolts 4. The semi-circular bayonet 3121 of the two symmetrically arranged clamping components 3 surrounds to form a clamping cavity 6 for clamping the outer hoop tube 1. The operating slots 3122 of the two symmetrically arranged clamping components 3 surround to form an operating cavity 5 for welding the straight seam 13 of the outer hoop tube. The width of the operating cavity 5 is greater than the width of the straight seam 13 of the outer hoop tube.

[0036] like Figures 2-6As shown, the clamp for welding the outer coupling of the tubular busbar includes two symmetrically arranged clamping components 3 and connecting bolts 4 for connecting the two clamping components 3 to clamp the outer coupling 1. Each clamping component 3 includes two parallel main steel plates 31, which serve as the assembly base plate of the clamp. A semi-circular notch 3121 for clamping the outer coupling 1 is abbreviated on the clamping section 312. The size of the semi-circular notch 3121 is designed according to the diameter of the outer coupling 1 to be welded. Above the circular bayonet 3121, there is also an operating slot 3122 that connects to the connecting section 311. The operating slot 3122 is strip-shaped. When the two sets of clamping components 3 are clamped on the outer clamping pipe 1, the semi-circular bayonet 3121 of the two sets of clamping components 3 surrounds to form a clamping cavity 6 for clamping the outer clamping pipe 1. The operating slot 3122 surrounds to form an operating cavity 5 for welding the straight seam 13 of the outer clamping pipe. The straight seam 13 of the outer clamping pipe 1 to be welded is located in the operating cavity 5. The operator uses an electric arc The welding rod is inserted into the operating cavity 5 to perform welding on the straight seam 13 to be welded. To ensure the connection stability between the two sets of clamping components 3, and to ensure that the clamping force generated by the clamping cavity 6 on the outer hoop tube 1 is a uniform centripetal clamping force, a first connecting plate 321 located in the connecting section 311 is provided between the two parallel main steel plates 31. The first connecting plate 321 has a threaded hole 325 for the connecting bolt 4 to pass through. A second connecting plate 322 is also provided between the extension sections 3123. The second connecting plate 322 has a threaded hole 325 for the connecting bolt 4 to pass through. The two sets of clamping components 3 are connected by the connecting bolts 4 respectively located on the upper and lower sections of the main steel plate 31. By locking the connecting bolts 4, the clamping cavity 6 is tightened until the straight seam 13 of the outer hoop tube 1 is closed. After the welding requirements are met, the two sets of clamping components 3 are kept in a locked state. The operator uses an arc welding rod to extend from the operating cavity 5 into the weld seam of the outer hoop tube 1 to perform welding on the straight seam. This tubular busbar outer clamp welding fixture is lightweight, compact, and easy to transport, making it suitable for high-altitude and confined space operations. Its simple structure and manufacturing process reduce manufacturing costs, and it is reusable. It is applicable to various complex environments and 360° straight seam welding of 13 steel pipes perpendicular to the weld direction. It generates sufficient pre-stressed gripping pressure between the connecting sleeve 11 and the tubular busbar joint 21, ensuring that the loop resistance between the connecting sleeve 11 and the tubular busbar 2 meets the relevant technical specifications. By rotating the welding angle to adjust to the optimal operating space, it overcomes the limitations of confined spaces due to the spacing of the tubular busbar 2, improving the welding quality and efficiency.

[0037] Specifically, the outer radius R of the outer hoop tube 1 is used as the basic unit of measurement, referencing... Figure 5The main steel plate 31 has a length L = 10R ± 5mm and a width W = 3R ± 5mm. The operating slot 3122 has a length of approximately L1 = 2R ± 5mm, and the semi-circular bayonet 3121 has a radius R ± 0.5mm. The main steel plate 31 is cut from a steel plate with a thickness of 13mm to 15mm. The single piece is in the shape of a semi-circular, smooth pipa (a traditional Chinese stringed instrument) without sharp edges. Its head is designed to be elliptical, and its tail is a rounded trapezoid. This design allows workers to adjust the welding angle in confined spaces and reduces the risk of bumps and scratches to the operator during operation.

[0038] To ensure the connection stability between the main steel plates 31, and thus to ensure the gripping force of the clamping cavity 6 on the outer clamping pipe 1, such as... Figure 3 As shown, the connecting plate assembly 32 further includes a first reinforcing rib plate 323 and a second reinforcing rib plate 324. The first reinforcing rib plate 323 is horizontally arranged below the first connecting plate 321 and above the operating slot 3122. The second reinforcing rib plate 324 is arranged on the clamping section 312 and is inclined towards the center of the semi-circular slot 3121 between the two main steel plates 31 for connecting the clamping section 312 of the main steel plates 31. While enhancing the bending strength of the clamping section 312 and the connecting section 311, the second reinforcing plate is arranged on the clamping section 312 and is inclined towards the center O of the semi-circular slot 3121 between the two main steel plates 31, which improves the mechanical strength of the device's centripetal grip, strengthens the gripping force of the outer clamp 1, and closes the straight seam 13 of the outer clamp 1. Specifically, the first reinforcing rib 323 and the second reinforcing rib 324 are welded onto the main steel plate 31. As a preferred embodiment, at least two first reinforcing ribs 323 are evenly spaced at the operating slot 3122, and at least two second reinforcing ribs 324 are spaced at the semi-circular notch 3121. By increasing the number of first reinforcing ribs 323 and second reinforcing ribs 324, the connection stability between the two parallel main steel plates 31 is ensured, while ensuring the uniform gripping force of the clamping cavity 6 formed by the semi-circular notch 3121 on the outer clamp tube 1.

[0039] To ensure that the clamps used for welding the outer coupling of the tubular busbar have adjustment margin during the welding process, such as... Figure 5As shown, the angle between the straight line of the connecting segment 311 facing the side of the other clamping component 3 and the perpendicular line to the center of the semicircular bayonet 3121 is 4°-5°; the angle between the straight line of the extension segment 3123 facing the side of the other clamping component 3 and the perpendicular line to the center of the semicircular bayonet 3121 is 4°-5°; the angle ∠AOB between the straight line of the connecting segment 311 facing the side of the other clamping component 3 (i.e., the upper straight edge 3111) and the perpendicular line BE to the center O of the semicircular bayonet 3121 is 4°-5°; the angle between the straight line of the extension segment 3123 facing the side of the other clamping component 3 (i.e., the lower straight edge 3124) and the perpendicular line BE to the center O of the semicircular bayonet 3121 is 4°-5°. The included angle ∠DOE is 4°-5°; by tilting the upper straight edge 3111 and the lower straight edge 3124, a certain angle is formed between the straight line containing the upper straight edge 3111 and the straight line containing the lower straight edge 3124 and the perpendicular line BE containing the center of the semicircular bayonet 3121. This ensures that during the clamping assembly 3, the connecting section 311 and the extension section 3123 of the main steel plate 31 will not be completely fitted under the locking of the connecting bolt 4, forming a "micro-tapered" clamping surface. The pre-tightening force of the connecting bolt 4 causes the clamping section 312 to undergo radial contraction. The angles ∠AOB and ∠DOE mentioned above cannot be too large, resulting in uneven gripping force on the outer clamp 1. The angles cannot be too small, resulting in difficulty in welding.

[0040] To facilitate the connection of bolt 4 in the first connecting plate 321 and the second connecting plate 322, and to adjust the concentricity of both ends of bolt 4 when tightening bolt 4 and closing the straight seam 13 of the outer clamp pipe, as follows: Figure 3 As shown, the threaded hole 325 is an elongated threaded hole.

[0041] To avoid the welding rod touching the main steel plate 31 and starting an arc during welding, such as... Figure 2 As shown, the operating slot 3122 facing the other clamping assembly 3 is also provided with a flame-retardant insulating shield 3125; the flame-retardant insulating shield 3125 has good insulation and flame retardancy, high temperature resistance, and corrosion resistance, which can prevent the welding rod from touching the main steel plate 31 and causing an arc during welding operations, thereby affecting the welding quality; specifically, as Figure 5 As shown, internal threaded holes 3126 are punched on both sides of the operating slot 3122 of the main steel plate 31, and then flat-head screws 3127 are used to pass through the flame-retardant insulating shield 3125 and connect to the internal threaded holes 3126 on the main steel plate 31, thereby setting the flame-retardant insulating shield 3125 in the operating slot 3122.

[0042] To ensure that the clamping assembly 3, after being tightened by the connecting bolts 4, exerts a uniform annular clamping force on the outer clamping tube 1, such as Figure 2As shown, the main steel plate 31 is spoon-shaped, and the two clamping components 3 are connected by connecting bolts 4 to form a pipa-shaped clamping structure. By designing the main steel plate 31 as a spoon shape, the upper part is long and narrow as a connecting section 311 to install the first connecting plate 321, connecting the upper parts of the two main steel plates 31 together. The lower part is semi-circular as a clamping section 312. A semi-circular notch 3121 is opened at the center of the semi-circle, so that when the connecting bolts 4 on the first connecting plate 321 and the second connecting plate 322 are tightened at the same time, the gripping force of the outer clamping pipe 1 at the semi-circular notch 3121 is a ring gripping force. This design effectively reduces the size of the clamp, making it convenient for operators to adjust the welding angle in a narrow space and reducing the risk of bumps and scratches to the operator during operation. At the same time, the long and narrow structure at the top makes it easy for the operator to hold and rotate the entire clamp to adjust the relative position of the operating cavity 5 and the straight seam 13 to be welded, providing a uniform centripetal gripping force when welding the pipe joint, effectively controlling the weld width and improving the welding quality.

[0043] To ensure the connection stability between the connecting bolt 4 and the clamping assembly 3, and to ensure that the tensile force on the two clamping assemblies 3 is uniform, such as Figure 2 As shown, the connecting bolt 4 includes a screw 41, a galvanized flat washer 42, a galvanized spring washer 43, and a nut 44. The screw 41 passes through the threaded hole 325 and is sequentially connected to the galvanized flat washer 42, the galvanized spring washer 43, and the nut 44. The galvanized flat washer 42 and the galvanized spring washer 43 effectively distribute the stress on the bolt, reducing the pressure between the nut and the first connecting plate 321 and the second connecting plate 322, thereby protecting the connecting surfaces from damage. The flat washer increases the contact area and reduces stress concentration, while the spring washer provides elasticity after the nut is tightened, preventing the nut from loosening.

[0044] This invention also provides a method for welding the outer coupling of a tubular busbar, mainly used in an auxiliary method for welding the outer coupling of a tubular busbar, including...

[0045] Step 1: Connect the tubular busbar 2 to the outer clamp pipe 1;

[0046] The outer hoop tube 1 is provided with a straight seam 13 along the length of the outer hoop tube, and the joints of the two tubular busbars are inserted into the outer hoop tube 1 in opposite directions;

[0047] Step 2: Clamp the clamp for welding the outer coupling of the tubular busbar as described in any one of claims 1-8 onto the outer coupling 1;

[0048] First, the semi-circular bayonet 3121 of the main steel plate 31 of the clamping assembly 3 is fitted onto the outer hoop tube 1 to be welded. Then, the semi-circular bayonet 3121 of the main steel plate 31 of the other clamping assembly 3 is fitted onto the opposite side of the outer hoop tube 1 to be welded. The outer hoop tube 1 is located in the clamping cavity 6. Then, the connecting bolt 4 is passed through the threaded hole 325 on the first connecting plate 321 and the threaded hole 325 on the second connecting plate 322 of the two clamping assemblies 3 to clamp the two clamping assemblies 3 onto the outer hoop tube 1.

[0049] Step 3: Rotate the clamp for welding the outer hoop 1 or the outer hoop of the tubular busbar so that the straight seam 13 of the outer hoop is located in the operating chamber 5;

[0050] Step 4: Tighten the connecting bolts 4 until the straight seam 13 of the outer clamp tube is closed;

[0051] Step 5: Weld the straight seam 13 of the outer hoop pipe by inserting the arc welding rod into the outer hoop pipe from the operating chamber 5 to perform the seam welding;

[0052] Step 6: Remove the clamps used for welding the outer clamp of the tubular busbar.

[0053] refer to Figure 1 First, the outer clamp 1 is assembled. The outer clamp 1 consists of a connecting sleeve 11 with a straight seam 13 and a conductive copper sleeve 12 with a straight seam 13. The conductive copper sleeve 12 is fitted onto the outside of the connecting sleeve 11, and the straight seams 13 of the two are aligned. The end of the tubular busbar 2 to be connected away from the tubular busbar joint 21 is fitted with a heat-shrinkable insulating tube 22. The two tubular busbar joints 21 are inserted into the outer clamp 1, as shown. Figures 6-7As shown, first, the semi-circular bayonet 3121 of one set of clamping components 3 is clamped on the outside of the outer hoop tube 1 to be welded. Then, the semi-circular bayonet 3121 of another set of clamping components 3 is clamped on the opposite side of the outer hoop tube 1 to be welded. Then, the two sets of symmetrically arranged clamping components 3 are connected using connecting bolts 4 to form a pipa-shaped clamping structure. Specifically, first, the screw 41 is passed through the threaded hole 325 of the second connecting plate 322 of the two sets of clamping components 3, the galvanized flat washer 42, and the galvanized spring washer 43 in sequence. The bottoms of the two symmetrically arranged clamping components 3 are locked using the nut 44 threaded to the screw 41. Then, the screw 41 is passed sequentially through the threaded hole 325 of the first connecting plate 321 of the two sets of clamping components 3, the galvanized flat washer 42, and the galvanized spring washer 43. The tops of the two symmetrically arranged clamping components 3 are then locked using the nut 44 threaded to the screw 41, so that the clamping cavity 6 formed by the two symmetrically arranged clamping components 3 covers the outer clamping tube 1. By screwing... The clamp mounted on the outer hoop tube is rotated, and the position of the operating cavity 5 formed by the operating slot 3122 is adjusted so that the operating cavity 5 is aligned with the straight seam 13 to be welded on the outer hoop tube 1. Alternatively, the outer hoop tube clamped in the clamping cavity 6 of the clamp is rotated, and the position of the straight seam 13 to be welded on the outer hoop tube 1 is adjusted so that the straight seam 13 to be welded is aligned with the operating cavity 5 on the clamp, so that the straight seam 13 to be welded is fully exposed in the operating cavity 5 for subsequent welding. After the range adjustment is completed, the operation is synchronized. Tighten the connecting bolts 4 on the first connecting plate 321 and the second connecting plate 322 until the gripping force generated by the semi-circular jaws 3121 of the clamping assembly 3 on the outer clamp tube 1 causes the straight seam 13 of the outer clamp tube 1 to close, meeting the welding requirements. After that, keep the two sets of clamping assemblies 3 locked and use an arc welding rod inserted into the weld seam of the outer clamp tube 1 from the operating chamber 5 to perform the joint welding. After the weld has cooled to the specified requirements, the joint welding fixture for the outer clamp tube of the tubular busbar can be removed. When the weld seam 13 to be welded is too long, additional joint welding fixtures for the outer clamp tube of the tubular busbar can be added according to the joint length, and multiple joint welding fixtures for the outer clamp tube of the tubular busbar can be used to complete the joint welding in coordination.

[0054] The method for welding the outer clamp of the tubular busbar utilizes the aforementioned clamp for welding the outer clamp of the tubular busbar. Its working principle is simple and easy to operate. Operators can adjust and tighten the connecting bolts 4 according to the requirements of the outer clamp 1 being welded, controlling the weld width and clamping force to ensure welding quality. This ensures that the clamped pipe after welding generates sufficient pre-stressed gripping pressure between the connecting sleeve 11 and the tubular busbar joint 21, guaranteeing that the circuit resistance between the connecting sleeve 11 and the tubular busbar meets the relevant technical specifications. Furthermore, the tubular busbar outer clamp welding clamp used in this method is lightweight, small in size, and easy to transport, facilitating high-altitude operations. Its simple structure and manufacturing process save manufacturing costs, and it can be reused repeatedly. It is suitable for welding various complex environments and 360° straight seam steel pipes perpendicular to the weld direction. By rotating the welding angle to adjust to the optimal operating space, it overcomes the limited space restricting the spacing of the tubular busbar, improving the welding quality and efficiency.

[0055] When the welding point is limited by the site environment and the welding joint angle needs to be adjusted for the operator to perform welding, step three further includes synchronously rotating the clamp for welding the outer coupling pipe and the outer coupling pipe of the busbar to adjust the welding angle; for example, when it is not possible to directly weld the straight seam 13 of the outer coupling pipe from above, and welding can only be performed from the right side at a 90° angle, such as... Figure 7 As shown, first, the clamping cavity 6 formed by the two symmetrically arranged clamping components 3 is attached to the outer clamping tube. The connecting bolt 4 is then placed on the clamping component 3, with the nut 44 of the connecting bolt 4 kept loose. The clamp, along with the straight seam 13 of the outer clamping tube, is rotated to an angle suitable for welding by the operator, ensuring that the straight seam 13 of the outer clamping tube remains within the operating cavity 5. The connecting bolt 4 is then tightened until the straight seam 13 of the outer clamping tube closes, at which point the operator can perform welding. By rotating the clamp and the outer clamping tube simultaneously, any welding seam angle with no dead angles (360°) can be obtained, making it suitable for various operating environments.

Claims

1. A clamp for welding the outer coupling of a tubular busbar, characterized in that: It includes two symmetrically arranged clamping assemblies (3) and a connecting bolt (4) disposed between the two clamping assemblies (3). The clamping assembly (3) includes two parallel main steel plates (31). Each main steel plate (31) includes a connecting section (311) and a clamping section (312) arranged from top to bottom. The clamping section (312) has a semi-circular notch (3121) recessed for clamping the outer clamp tube. The clamping section (312) also has an operating slot (3122) located above the semi-circular notch (3121) and connected to the connecting section (311). The operating slot (3122) is strip-shaped. Below the semi-circular notch (3121) is a downwardly extending extension section (3123). A connecting plate assembly (32) for connecting the two main steel plates (31) is provided between them. The connecting plate assembly (32) includes a vertically arranged first connecting plate (321) and a second connecting plate (322). The first connecting plate (321) is disposed between the connecting section (311) of the two main steel plates (31), and the second connecting plate (322) is disposed between the extension section (3123) of the two main steel plates (31). Both the first connecting plate (321) and the second connecting plate (322) are provided with threaded holes (325) for threaded connection with connecting bolts (4). The semi-circular notches (3121) of the two symmetrically arranged clamping components (3) enclose to form a clamping cavity (6) for clamping the outer hoop pipe, and the operating slots (3122) of the two symmetrically arranged clamping components (3) enclose to form an operating cavity (5) for welding the straight seam of the outer hoop pipe, and the width of the operating cavity (5) is greater than the width of the straight seam of the outer hoop pipe.

2. The clamp for welding the outer coupling of a tubular busbar as described in claim 1, characterized in that: The connecting plate assembly (32) further includes a first reinforcing rib plate (323) and a second reinforcing rib plate (324). The first reinforcing rib plate (323) is arranged horizontally below the first connecting plate (321) and above the operating slot (3122). The second reinforcing rib plate (324) is arranged on the clamping section (312) and is inclined towards the center of the semi-circular slot (3121) between the two main steel plates (31) for connecting the main steel plates (31).

3. The clamp for welding the outer coupling of a tubular busbar as described in claim 2, characterized in that: The first reinforcing ribs (323) are at least two and are evenly spaced at the operating slot (3122), and the second reinforcing ribs (324) are at least two and are spaced at the semi-circular notch (3121).

4. The clamp for welding the outer coupling of a tubular busbar as described in claim 1, characterized in that: The angle between the straight line of the connecting segment (311) facing the side of the other clamping component (3) and the perpendicular line of the center of the semicircular bayonet (3121) is 4°-5°; the angle between the straight line of the extension segment (3123) facing the side of the other clamping component (3) and the perpendicular line of the center of the semicircular bayonet (3121) is 4°-5°.

5. The clamp for welding the outer coupling of a tubular busbar as described in claim 1, characterized in that: The threaded hole (325) is an elongated threaded hole.

6. The clamp for welding the outer coupling of a tubular busbar as described in claim 1, characterized in that: The operating slot (3122) is also provided with a flame-retardant insulating shield (3125) on the side facing the other clamping assembly (3).

7. The clamp for welding the outer coupling of a tubular busbar as described in claim 1, characterized in that: The main steel plate (31) is spoon-shaped, and the two clamping components (3) are connected by connecting bolts (4) to form a pipa-shaped clamping structure.

8. The clamp for welding the outer coupling of a tubular busbar as described in claim 1, characterized in that: The connecting bolt (4) includes a screw (41), a galvanized flat washer (42), a galvanized spring washer (43), and a nut (44). The screw (41) passes through a threaded hole (325) and is connected to the galvanized flat washer (42), the galvanized spring washer (43), and the nut (44) in sequence.

9. A method for welding the joint of the outer clamp of a tubular busbar, characterized in that: include: Step 1: Connect the tubular busbar (2) to the outer clamp pipe (1); The outer hoop tube (1) is provided with a straight seam (13) along the length of the outer hoop tube, and the joints of the two tubular busbars (2) are inserted into the outer hoop tube (1) in opposite directions; Step 2: Clamp the clamp for welding the outer coupling of the tubular busbar as described in any one of claims 1-8 onto the outer coupling. First, the semi-circular slot (3121) of the main steel plate (31) of a set of clamping components (3) is clamped onto the outer hoop tube to be welded. Then, the semi-circular slot (3121) of the main steel plate (31) of another set of clamping components (3) is clamped onto the opposite side of the outer hoop tube to be welded. The outer hoop tube is located in the clamping cavity (6). Then, the connecting bolt (4) is passed through the threaded hole (325) on the first connecting plate (321) and the threaded hole (325) on the second connecting plate (322) of the two sets of clamping components (3) to clamp the two clamping components (3) onto the outer hoop tube. Step 3: Rotate the clamp for welding the outer hoop or the outer hoop of the tubular busbar so that the straight seam (13) of the outer hoop is located in the operating chamber (5); Step 4: Tighten the connecting bolts (4) until the straight seam (13) of the outer clamp pipe is closed; Step 5: Weld the straight seam (13) of the outer hoop pipe, and insert the arc welding rod from the operating chamber (5) into the outer hoop pipe to perform the seam welding; Step 6: Remove the clamps used for welding the outer clamp of the tubular busbar.

10. The method for welding the outer clamp of a tubular busbar as described in claim 9, characterized in that: Step three is followed by simultaneously rotating the clamp for welding the outer hoop and the tubular busbar outer hoop, and adjusting the angle of the welding joint.

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