Square copper wire cold pressure butt joint device and method

Abstract

This invention belongs to the field of cold-pressing splicing technology for wires, and discloses a device and method for cold-pressing splicing square copper wires. The device includes: an upper locking component, an upper wedge block, a lower wedge block, a lower locking component, and a wire sleeve, all coaxially arranged. The wire sleeve is used to fix the ends of two square copper wires to be spliced, which have the same height relative to the top of the sleeve and face each other. The material of the wire sleeve is flexible. The lower and upper wedge blocks are sequentially sleeved on the outside of the wire sleeve. The center of the overall structure of the lower and upper wedge blocks is the same as the center of the ends to be spliced ​​relative to the top of the wire sleeve, and the contact surfaces of the lower and upper wedge blocks are compatible. The lower wedge block, upper wedge block, and wire sleeve are placed inside the lower locking component, and the upper and lower locking components are locked together for cold-pressing splicing the two ends to be spliced. This invention can improve the uniformity of cold-pressing splicing of square copper wires, thereby improving electrical and mechanical properties.

Description

Technical Field

[0001] This invention belongs to the field of cold pressing and splicing technology for conductors, and more specifically, relates to a device and method for cold pressing and splicing square copper conductors. Background Technology

[0002] In the manufacturing and maintenance of power and electrical equipment, the connection of copper wires is one of the key processes. Currently, copper wire connections typically employ methods such as welding, mechanical joining, and cold pressing. Compared to welding and mechanical joining, cold pressing connects the wires through physical deformation under pressure, requiring no heating. This method is suitable for low-temperature environments and can, to some extent, maintain the original mechanical properties of the material.

[0003] Current cold-pressing techniques for connecting copper conductors are mostly used for non-square cross-section copper conductors (mostly round solid copper conductors). However, there are no mature, publicly available technologies for cold-pressing square copper conductors. Specifically, due to the unique shape of square copper conductors, the connection point is a surface contact, unlike the line contact used for round copper conductors. Therefore, existing cold-pressing methods struggle to ensure uniform compression of the square copper conductor connection surfaces, leading to a reduction in electrical and mechanical performance. Summary of the Invention

[0004] In view of the above-mentioned defects or improvement needs of the prior art, the present invention provides a cold pressing and splicing device and method for square copper wires, the purpose of which is to improve the uniformity of cold pressing and splicing of square copper wires, so as to improve electrical and mechanical performance.

[0005] To achieve the above objectives, according to a first aspect of the present invention, a cold-pressing device for square copper wires is provided, comprising: an upper locking component, an upper wedge block, a lower wedge block, a lower locking component, and a wire sleeve, all coaxially arranged.

[0006] The inside of the wire sleeve is used to fix the ends of two square copper wires to be joined, which are at the same height relative to the top of the wire sleeve and have their cold-pressed surfaces facing each other, and the material of the wire sleeve is flexible.

[0007] The lower wedge block and the upper wedge block are sequentially sleeved on the outside of the wire sleeve. The center of the overall structure of the lower wedge block and the upper wedge block is the same as the center of the end to be connected relative to the top of the wire sleeve, and the contact surfaces of the lower wedge block and the upper wedge block are adapted to each other. The lower wedge block, the upper wedge block and the wire sleeve are placed inside the lower locking component, and the upper locking component is locked with the lower locking component for cold pressing connection of the two cold pressing surfaces of the end to be connected.

[0008] Furthermore, when the square copper wire is a square hollow copper wire, both the wire sleeve and the lower locking component are open at both ends. An O-ring is provided between the inner side of the upper locking component and the end to be connected inside the wire sleeve to ensure the sealing of the connection end.

[0009] Furthermore, a sealant is evenly applied around the O-ring.

[0010] Furthermore, the O-ring and the sealant are made of corrosion-resistant materials.

[0011] Furthermore, the upper locking component and the lower locking component are respectively an upper locking nut and a lower locking nut; the inner side of the upper locking nut is provided with an internal thread, and the outer side of the lower locking nut is provided with an external thread that matches the internal thread of the upper locking nut.

[0012] Furthermore, the material of the wire sleeve is copper.

[0013] Furthermore, the lower wedge block is conical, and the upper wedge block is inverted conical.

[0014] According to a second aspect of the present invention, a method for cold pressing and connecting square copper wires using the cold pressing and connecting device described in any one of the first aspects is provided.

[0015] According to a third aspect of the present invention, a pulse magnet is provided, wherein a square copper wire is wound on the pulse magnet, and the end of the square copper wire to be connected is provided with a cold pressing connection device for the square copper wire as described in any one of the first aspects, or the end to be connected is cold pressed connected by the method described in the second aspect.

[0016] In summary, the above-described technical solutions conceived in this invention can achieve the following beneficial effects:

[0017] (1) In the square copper wire cold pressing and splicing device of the present invention, during the locking process, the upper locking component and the lower locking component squeeze each other, transmitting pressure to the lower wedge block and the upper wedge block. The lower wedge block and the upper wedge block squeeze the wire sleeve to cause a certain radial deformation of the wire sleeve, thereby squeezing the two square copper wire ends to be joined inside the wire sleeve, realizing the cold pressing and splicing of the two cold pressing surfaces of the two ends to be joined. Inside the wire sleeve, since the two cold pressing surfaces of the two square copper wire ends to be joined are in surface contact, during the cold pressing process, the lower wedge block and the upper wedge block with matching contact surface shapes can ensure that the applied pressure is evenly distributed on the contact surface (two cold pressing surfaces) of the square copper wire, thereby ensuring the uniform pressing of the square copper wire cold pressing surfaces, thereby improving the electrical and mechanical properties.

[0018] (2) Furthermore, the docking device of the present invention can also be applied to square hollow copper wires. In this case, the wire sleeve and the lower locking component are both open at both ends. An O-ring is provided between the inner side of the upper locking component and the end to be docked in the wire sleeve. This can prevent external air or the water coolant flowing through the square hollow copper wire from entering the docking part and ensure the sealing of the joint.

[0019] (3) Preferably, the sealing performance can be further improved by evenly applying sealant around the O-ring.

[0020] (4) Preferably, the O-ring and sealant are made of corrosion-resistant materials to meet the needs of use in different environments.

[0021] (5) Preferably, the material of the wire sleeve is copper, which can undergo a certain radial deformation under the extrusion of the lower wedge block and the upper wedge block, and extrude the cold pressing of the two square copper wires to be connected inside the wire sleeve, without excessive deformation to cause deformation of the ends to be connected.

[0022] (6) Preferably, the lower wedge is conical and the upper wedge is inverted conical, so that during the locking process of the upper and lower locking components, the pressure applied to the upper and lower wedges can gradually tighten the ends of the two square copper wires to be connected, ensuring a tight connection. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of the square copper wire cold pressing and splicing device in an embodiment of the present invention.

[0024] In all the accompanying drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0025] 1-Upper locking component, 2-O-ring seal, 3-Upper wedge block, 4-Lower wedge block, 5-Lower locking component, 6-Wire sleeve, 7-Square hollow copper wire. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0027] Example 1

[0028] like Figure 1As shown, this embodiment of the invention provides a cold-pressing device for square copper wires, which mainly includes: an upper locking component 1, an upper wedge block 3, a lower wedge block 4, a lower locking component 5, and a wire sleeve 6, all coaxially arranged.

[0029] The inside of the wire sleeve 6 is used to fix the ends of two square copper wires to be joined, which are at the same height at the top of the wire sleeve 6 and have their cold-pressed surfaces facing each other. The internal shape of the wire sleeve 6 is adapted to the two square copper wires, so that the two square copper wires can be aligned side by side and fixed inside the wire sleeve 6. The material of the wire sleeve 6 is flexible.

[0030] The lower wedge block 4 and the upper wedge block 3 are sequentially fitted onto the outside of the wire sleeve 6. The center of the overall structure of the lower wedge block 4 and the upper wedge block 3 is the same as the center of the end to be joined relative to the top of the wire sleeve 6, and the contact surfaces of the lower wedge block 4 and the upper wedge block 3 are compatible. The lower wedge block 4, the upper wedge block 3, and the wire sleeve 6 are placed inside the lower locking component 5, and the upper locking component 1 is locked to the lower locking component 5 for cold pressing the two cold pressing surfaces of the ends of the two square copper wires to be joined. In this embodiment of the invention, the cold pressing surface of the end of the square copper wire to be joined can be any one of the four sides of the square copper wire.

[0031] In the square copper wire cold pressing and splicing device of this invention, during the locking process, the upper locking component 1 and the lower locking component 5 press against each other, transmitting pressure to the lower wedge block 4 and the upper wedge block 3. The lower wedge block 4 and the upper wedge block 3 press against the wire sleeve 6, causing the wire sleeve 6 to undergo a certain radial deformation, thereby pressing the ends of the two square copper wires to be joined inside the wire sleeve 6, realizing the cold pressing and splicing of the two cold pressing surfaces of the two ends. Inside the wire sleeve 6, since the two cold pressing surfaces of the ends of the two square copper wires to be joined are in surface contact, during the cold pressing process, the lower wedge block 4 and the upper wedge block 3, whose contact surface shapes are adapted, can ensure that the applied pressure is evenly distributed on the contact surface (two cold pressing surfaces) of the square copper wires, ensuring uniform pressing of the cold pressing surfaces of the square copper wires, thereby improving electrical and mechanical performance.

[0032] When the square copper wire is a square hollow copper wire 7, both the wire sleeve 6 and the lower locking component 5 are open at both ends. An O-ring 2 is provided between the inner side of the upper locking component 1 and the end to be joined inside the wire sleeve 6 to provide a sealing function during cold pressing, preventing external air or the coolant circulating inside the square hollow copper wire 7 from entering areas outside the joining part. In this embodiment of the invention, as... Figure 1As shown, the two opposing cold-pressing surfaces of the ends of the two square copper wires to be joined are aligned at the same position on the upper end of the wire sleeve 6 to ensure precise positioning of the wires. The lower wedge block 4 and the upper wedge block 3 are sequentially fitted onto the upper end of the wire sleeve 6. Then, the lower wedge block 4, the upper wedge block 3, and the upper end of the wire sleeve 6 are inserted into the upper end of the lower locking component 5, and the upper locking component 1 is locked to the upper end of the lower locking component 5. To ensure sealing during the joining process, an O-ring 2 is provided between the inner side of the upper locking component 1 and the ends to be joined inside the wire sleeve 6 at the upper end of the lower locking component 5. In other embodiments, the two opposing cold-pressing surfaces of the ends of the two square copper wires to be joined can be positioned at the same height relative to the top of the wire sleeve 6.

[0033] Preferably, the O-ring 2 is coated with sealant evenly during assembly to further improve sealing performance.

[0034] Preferably, the O-ring 2 can be made of a corrosion-resistant material; the sealant can be made of a waterproof and corrosion-resistant material to meet the needs of use in different environments.

[0035] The upper locking component 1 and the lower locking component 5 provide locking force to ensure reliable connection of the wires. Preferably, the upper locking component 1 and the lower locking component 5 are an upper locking nut and a lower locking nut, respectively. The inner side of the upper locking nut has an internal thread, and the outer side of the lower locking nut has an external thread that matches the internal thread of the upper locking nut. The upper locking nut and the lower locking nut are locked together by a threaded connection. In this embodiment of the invention, the internal shape of the upper locking nut is a hollow cylindrical structure with internal threads, which are helically connected to the external threads on the outer side of the lower locking nut.

[0036] Preferably, the outer cross-sectional shape of the wire sleeve 6 is circular. In this embodiment of the invention, the wire sleeve 6 is used to fix the position of two square copper wires, ensuring that the ends of the wires to be joined are aligned side by side during the cold pressing process (i.e., the cold pressing surfaces of the ends to be joined are set at the same height from the top of the wire sleeve 6). It also has a certain degree of flexibility. The lower wedge block 4 and the upper wedge block 3 squeeze the wire sleeve 6 to make the wire sleeve 6 undergo a certain radial deformation, thereby squeezing the cold pressing joint of the ends of the two square copper wires to be joined inside the wire sleeve 6.

[0037] Preferably, the material of the wire sleeve 6 is copper, more preferably red copper, which can undergo a certain radial deformation under the extrusion of the lower wedge block 4 and the upper wedge block 3, and cold press the ends of the two square copper wires to be connected inside the wire sleeve 6 without excessive deformation that would cause deformation of the ends to be connected.

[0038] Preferably, the inner wall of the wire sleeve 6 can be surface treated to reduce friction during wire assembly.

[0039] The lower wedge block 4 and the upper wedge block 3 are used to tightly press the two wires together. Preferably, the lower wedge block 4 is conical, and correspondingly, the upper wedge block 3 is inverted conical, so that during the locking process of the upper locking component 1 and the lower locking component 5, the pressure applied to the upper wedge block 3 and the lower wedge block 4 can gradually tighten the ends of the two square copper wires to be joined, ensuring a tight connection.

[0040] Preferably, the lower wedge block 4 and the upper wedge block 3 are made of wear-resistant and pressure-resistant materials to ensure stability and durability during repeated use.

[0041] This invention employs a cold-press butt welding method, ensuring that the connection process of square hollow copper wires is unaffected by welding heat, protecting the wire's insulation layer and avoiding defects such as welding cracks. The connected wires exhibit excellent conductivity and mechanical strength, making them suitable for long-life, high-reliability wound magnet applications. Therefore, this invention is applicable to industrial production settings requiring efficient, safe, and low-cost connections of square hollow copper wires.

[0042] Example 2

[0043] This invention provides a method for cold pressing and butt welding of square copper wires, comprising:

[0044] Wire positioning: Insert the ends of two square copper wires to be joined into the wire sleeve 6, so that the two cold-pressed surfaces of the ends to be joined are positioned at the same height from the top of the wire sleeve 6; wherein, the internal shape of the wire sleeve 6 is adapted to the cross-sectional shape of the two square copper wires, and the material of the wire sleeve 6 is flexible.

[0045] Assemble the wedge blocks: Sleeve the lower wedge block 4 and the upper wedge block 3 onto the outside of the wire sleeve 6 in sequence. The center of the overall structure of the lower wedge block 4 and the upper wedge block 3 is the same as the center of the end to be connected relative to the top of the wire sleeve 6, and the contact surfaces of the lower wedge block 4 and the upper wedge block 3 are matched to ensure that the wire is subjected to uniform force during the cold pressing process.

[0046] Locking operation: Place the lower wedge block 4, the upper wedge block 3 and the wire sleeve 6 into the lower locking component 5, and lock the upper locking component 1 and the lower locking component 5 together to complete the cold pressing connection of the ends of the two square copper wires to be connected.

[0047] As a preferred implementation, the upper locking component 1 and the lower locking component 5 are tightened using a torque wrench. The torque of the torque wrench is set to a predetermined value to further ensure uniform clamping force during the cold pressing process.

[0048] As a preferred implementation, when the square copper wire is a square hollow copper wire 7, both the wire sleeve 6 and the lower locking component 5 are open at both ends. An O-ring 2 is provided between the inner side of the upper locking component 1 and the end to be connected inside the wire sleeve 6. During the assembly process, the O-ring 2 is evenly coated with sealant. The O-ring 2 and the sealant are used to enhance the sealing effect of the joint and prevent the external environment from affecting the connection part.

[0049] Example 3

[0050] This invention provides a pulse magnet with square copper wires wound on it. The ends of the two square copper wires to be connected are provided with the square copper wire cold pressing connection device in Embodiment 1, or the ends of the two square copper wires to be connected are connected by the square copper wire cold pressing connection method in Embodiment 2.

[0051] The relevant technical solutions are described in Embodiment 1 or Embodiment 2, and will not be repeated here.

[0052] Using the cold-pressing connection device of this invention simplifies the operation process, reduces the technical requirements for workers, and significantly improves the service life of magnets wound with square copper wires. The cold-pressing connection method and device provided by this invention can achieve efficient and reliable connection of square hollow copper wires, avoiding damage to the insulation layer and the generation of welding cracks, and is suitable for the cold-pressing connection needs of industrial production.

[0053] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A cold-pressing and butt-jointing device for square copper wires, characterized in that, include: The coaxially arranged upper locking component (1), upper wedge block (3), lower wedge block (4), lower locking component (5), and wire sleeve (6) are provided. The inside of the wire sleeve (6) is used to fix the ends of two square copper wires to be joined, which are at the same height relative to the top of the wire sleeve (6) and have opposite cold pressing surfaces. The material of the wire sleeve (6) is flexible and is used to deform radially when squeezed by the upper wedge block (3) and the lower wedge block (4) so ​​as to uniformly squeeze the ends of the two square copper wires to be joined. The lower wedge block (4) and the upper wedge block (3) are sequentially sleeved on the outside of the wire sleeve (6). The center of the overall structure of the lower wedge block (4) and the upper wedge block (3) is the same as the center of the end to be connected relative to the top of the wire sleeve (6), and the contact surfaces of the lower wedge block (4) and the upper wedge block (3) are compatible. The lower wedge block (4), the upper wedge block (3) and the wire sleeve (6) are placed inside the lower locking component (5), and the upper locking component (1) is connected to the lower wedge block (6). Locking component (5) locks; wherein, during the locking process, the upper locking component (1) and the lower locking component (5) squeeze each other, transmitting pressure to the lower wedge block (4) and the upper wedge block (3), the lower wedge block (4) and the upper wedge block (3) squeeze the wire sleeve (6) to cause the wire sleeve (6) to undergo radial deformation, thereby squeezing the two square copper wire ends to be connected inside the wire sleeve (6) to perform surface contact cold pressing connection on the two cold pressing surfaces of the ends to be connected.

2. The cold pressing and splicing device for square copper wires according to claim 1, characterized in that, When the square copper wire is a square hollow copper wire (7), the wire sleeve (6) and the lower locking component (5) are both open at both ends. An O-ring (2) is provided between the inner side of the upper locking component (1) and the end to be connected in the wire sleeve (6) to ensure the sealing of the connection end.

3. The cold pressing and splicing device for square copper wires according to claim 2, characterized in that, The O-ring (2) is evenly coated with sealant.

4. The cold pressing and splicing device for square copper wires according to claim 3, characterized in that, The O-ring (2) and the sealant are made of corrosion-resistant materials.

5. The cold pressing and splicing device for square copper wires according to any one of claims 1-4, characterized in that, The upper locking component (1) and the lower locking component (5) are respectively an upper locking nut and a lower locking nut; the inner side of the upper locking nut is provided with an internal thread, and the outer side of the lower locking nut is provided with an external thread that matches the internal thread of the upper locking nut.

6. The cold pressing and splicing device for square copper wires according to claim 5, characterized in that, The material of the conductor sleeve (6) is copper.

7. The cold pressing and splicing device for square copper wires according to any one of claims 1-4, characterized in that, The lower wedge block (4) is conical, and the upper wedge block (3) is inverted conical.

8. A method for cold pressing and connecting square copper wires using the cold pressing and connecting device according to any one of claims 1-7.

9. A pulse magnet, wherein a square copper wire is wound on the pulse magnet, characterized in that, The square copper wire to be connected is provided with a square copper wire cold pressing connection device as described in any one of claims 1-7, or the end to be connected is cold pressed and connected by the method described in claim 8.

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