Square copper wire cold pressing butt joint device and method

Abstract

The invention belongs to the technical field of wire cold pressing butt joint, and discloses a square copper wire cold pressing butt joint device and method.The device comprises an upper locking component, an upper wedge block, a lower wedge block, a lower locking component and a wire sleeve which are coaxially arranged; the inner part of the wire sleeve is used for fixedly placing to-be-butted end parts of two square copper wires with the same height relative to the top end of the wire sleeve and opposite to-be-cold-pressed surfaces, and the material of the wire sleeve has flexibility; the lower wedge-shaped block and the upper wedge-shaped block are sequentially connected outside the wire sleeve in a sleeving mode, the center of the overall structure of the lower wedge-shaped block and the upper wedge-shaped block and the center of the end to be in butt joint are the same relative to the top end of the wire sleeve, and the contact faces of the lower wedge-shaped block and the upper wedge-shaped block are matched. The lower wedge-shaped block, the upper wedge-shaped block and the wire sleeve are placed in the lower locking component, and the upper locking component and the lower locking component are locked and used for cold pressing butt joint of the two faces to be cold-pressed of the end to be in butt joint. According to the invention, the uniformity of cold-pressing butt joint of the square copper conductor can be improved, so that the electrical and mechanical properties are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of cold-pressed butt joint of wires, and more specifically, relates to a device and method for cold-pressed butt joint of square copper wires. Background Art

[0002] In the manufacturing and maintenance of power and electrical equipment, the connection of copper wires is one of the key processes. In the prior art, copper wires are usually connected by welding, mechanical connection, cold pressing butt joint, etc. Compared with welding and mechanical connection, the cold pressing butt joint method uses physical deformation connection by applying pressure, does not require heating, is suitable for operation in low temperature environments, and can maintain the original mechanical properties of the material to a certain extent.

[0003] The current technical solutions for cold-pressing copper wire connection are mostly used for copper wires with non-square cross-sections (mostly round solid copper wires), and there is no mature public application technology for cold-pressing square copper wires. Specifically, due to the special shape of square copper wires, the joint is surface contact, rather than line contact when round copper wires are joined. Therefore, the existing cold-pressing jointing method is difficult to ensure uniform compression of the square copper wire joint surface, resulting in reduced electrical and mechanical performance. Summary of the invention

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a square copper wire cold-pressing butt joint device and method, which aims to improve the uniformity of the square copper wire cold-pressing butt joint to improve the electrical and mechanical properties.

[0005] To achieve the above object, according to a first aspect of the present invention, there is provided a square copper wire cold-pressing butt joint device, comprising: an upper locking component, an upper wedge block, a lower wedge block, a lower locking component, and a wire sleeve that are coaxially arranged;

[0006] The inside of the wire sleeve is used to fix the ends of two square copper wires to be butted, which are at the same height relative to the top of the wire sleeve and whose cold-pressed surfaces face 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 in the lower locking component, and the upper locking component is locked with the lower locking component, so as to perform cold pressing connection on the two surfaces to be cold pressed of the end to be connected.

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

[0009] Furthermore, 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, there is provided a method for cold-pressing butt jointing using the square copper wire cold-pressing butt jointing device described in any one of the first aspects.

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

[0016] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects:

[0017] (1) In the square copper wire cold-pressing docking device of the present invention, during the locking process, the upper locking component and the lower locking component squeeze each other, transferring pressure to the lower wedge block and the upper wedge block, and 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 ends of the square copper wires to be docked in the wire sleeve, and realizing the cold-pressing docking of the two surfaces to be cold-pressed at the two ends to be docked. In the wire sleeve, since the two surfaces to be cold-pressed at the ends to be docked of the two square copper wires 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 surfaces to be cold-pressed) of the square copper wire, thereby ensuring uniform compression of the surfaces to be cold-pressed of the square copper wires, thereby improving 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-ended structures, and an O-ring is provided between the inner side of the upper locking component and the end to be docked in the wire sleeve, which can prevent external air or water-cooling liquid in the square hollow copper wire from entering positions outside the docking position, thereby ensuring the sealing of the joint.

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

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

[0021] (5) Preferably, the wire sleeve is made of copper, which can undergo a certain radial deformation under the extrusion of the lower wedge block and the upper wedge block, and cold-press the ends of the two square copper wires to be connected in the wire sleeve without excessive deformation to deform the ends to be connected.

[0022] (6) Preferably, the lower wedge block is conical, and correspondingly, the upper wedge block is an inverted cone, so that during the locking process of the upper locking component and the lower locking component, the pressure applied to the upper wedge block and the lower wedge block can gradually tighten the ends of the two square copper wires to be connected, ensuring a tight connection. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0025] 1-upper locking component, 2-O-ring, 3-upper wedge block, 4-lower wedge block, 5-lower locking component, 6-wire sleeve, 7-square hollow copper wire. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present 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, an embodiment of the present invention provides a square copper wire cold-pressed butt joint device, which mainly includes: a coaxially arranged upper locking component 1, an upper wedge block 3, a lower wedge block 4, a lower locking component 5, and a wire sleeve 6.

[0029] The interior of the wire sleeve 6 is used to fix the ends of two square copper wires to be connected, which have the same height relative to the top of the wire sleeve 6 and whose cold-pressed surfaces face 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 and fixed side by side inside the wire sleeve 6, and the material of the wire sleeve 6 is flexible.

[0030] 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 surface of the lower wedge block 4 and the upper wedge block 3 is adapted; the lower wedge block 4, the upper wedge block 3 and the wire sleeve 6 are placed in the lower locking component 5, and the upper locking component 1 is locked with the lower locking component 5, which is used for cold pressing the two cold pressing surfaces of the ends to be connected of the two square copper wires. In the embodiment of the present invention, the cold pressing surface of the end to be connected of the square copper wire can be any side of the four side surfaces of the square copper wire.

[0031] In the square copper wire cold-pressing docking device of the present invention, during the locking process, the upper locking component 1 and the lower locking component 5 squeeze each other, and transmit 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 a certain radial deformation of the wire sleeve 6, and then squeeze the two ends of the square copper wires to be docked in the wire sleeve 6, so as to achieve the cold-pressing docking of the two surfaces to be cold-pressed at the two ends to be docked. In the wire sleeve 6, since the two surfaces to be cold-pressed at the ends to be docked of the two square copper wires are in surface contact, during the cold-pressing process, the lower wedge block 4 and the upper wedge block 3 with matching contact surface shapes can ensure that the applied pressure is evenly distributed on the contact surface (two surfaces to be cold-pressed) of the square copper wire, ensuring the uniform compression of the surfaces to be cold-pressed of the square copper wires, thereby improving the electrical and mechanical properties.

[0032] 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-ended structures, and an O-ring 2 is provided between the inner side of the upper locking component 1 and the end to be docked in the wire sleeve 6, which is used to provide a sealing function during the cold-press docking process, and can prevent external air or water-cooling liquid in the square hollow copper wire 7 from entering positions outside the docking position. In the embodiment of the present invention, Figure 1As shown, the two facing cold-pressed surfaces of the ends to be butted of the two square copper wires are aligned at the same position on the upper end of the wire sleeve 6 to ensure the precise positioning of the wires, the lower wedge block 4 and the upper wedge block 3 are sequentially sleeved on the upper end of the outer side of the wire sleeve 6, and then the lower wedge block 4, the upper wedge block 3 and the upper end of the wire sleeve 6 are installed into the upper end of the lower locking component 5, and the upper locking component 1 is locked with the upper end of the lower locking component 5. In order to ensure the sealing during the butt joint process, an O-ring 2 is provided between the inner side of the upper locking component 1 and the end to be butted in the wire sleeve 6 at the upper end of the lower locking component 5. In other embodiments, the two facing cold-pressed surfaces of the ends to be butt joint of the two square copper wires can be at the same height relative to the top of the wire sleeve 6.

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

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

[0035] The upper locking component 1 and the lower locking component 5 are used to provide a locking force to ensure reliable docking of the wires. Preferably, the upper locking component 1 and the lower locking component 5 correspond to 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, and the upper locking nut and the lower locking nut are locked by threaded connection. In the embodiment of the present invention, the internal shape of the upper locking nut is a hollow cylindrical structure, with an internal thread, which is spirally connected to the external thread on the outer side of the lower locking nut.

[0036] Preferably, the outer cross-sectional shape of the wire sleeve 6 is circular. In the embodiment of the present invention, the wire sleeve 6 is used to fix the positions of the two square copper wires, ensuring that the ends of the wires to be butted are aligned side by side during the cold pressing process (i.e., the cold pressing surfaces of the ends to be butted are arranged facing each other at the same height from the top of the wire sleeve 6), and it has a certain flexibility, and the lower wedge block 4 and the upper wedge block 3 squeeze the wire sleeve 6 to cause a certain radial deformation of the wire sleeve 6, thereby squeezing the cold pressing butt joint of the ends of the two square copper wires to be butted in 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 in the wire sleeve 6 without excessive deformation to deform the ends to be connected.

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

[0039] The lower wedge block 4 and the upper wedge block 3 are used to press the two wires tightly 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 on the upper wedge block 3 and the lower wedge block 4 can gradually tighten the ends of the two square copper wires to be connected, 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] The present invention adopts a cold-pressed butt-jointing method, so that the connection process of the square hollow copper wire is not affected by welding heat, the insulation layer of the wire is protected, and defects such as welding cracks are avoided. The connected wire has excellent electrical conductivity and mechanical strength, and is suitable for long-life, high-reliability winding magnet application scenarios. Therefore, the present invention is suitable for industrial production occasions that require efficient, safe, and low-cost connection of square hollow copper wires.

[0042] Example 2

[0043] The embodiment of the present invention provides a method for cold-pressing and butting square copper wires, comprising:

[0044] Wire positioning: insert the ends of the two square copper wires to be connected into the wire sleeve 6, so that the two cold-pressed surfaces of the ends to be connected are facing each other and are arranged 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 on 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 adapted to ensure uniform force on the wire during the cold pressing process.

[0046] Locking operation: place the lower wedge block 4, the upper wedge block 3 and the wire sleeve 6 in the lower locking component 5, and lock the upper locking component 1 with the lower locking component 5 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 by a torque wrench. The torque of the torque wrench is set to a predetermined value to further ensure uniform pressing force during the cold pressing process.

[0048] As a preferred implementation method, 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 structures at both ends, and 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. The O-ring 2 is evenly coated with sealant during the assembly process. The O-ring and 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] An embodiment of the present invention provides a pulse magnet, on which a square copper wire is wound, and the ends of two square copper wires to be connected are provided with the square copper wire cold-pressing connection device in Example 1, or the ends of two square copper wires to be connected are connected by the square copper wire cold-pressing connection method in Example 2.

[0051] For the related technical solutions, please refer to the description in Example 1 or Example 2, which will not be repeated here.

[0052] The cold-pressed butt joint device of the present invention is used for butt joint, which can simplify the operation process, reduce the technical requirements of workers, and significantly improve the service life of the square copper wire winding magnet. The cold-pressed butt joint method and device provided by the present invention can realize efficient and reliable butt joint of square hollow copper wires, avoid damage to the insulation layer caused by welding and the generation of welding cracks, and are suitable for the cold-pressed connection needs of industrial production.

[0053] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A square copper wire cold-pressing butt joint device, characterized in that: include: 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) are coaxially arranged; The inside of the wire sleeve (6) is used to fix the ends of two square copper wires to be butted, which are at the same height relative to the top of the wire sleeve (6) and whose cold-pressed surfaces face each other, and the material of the wire sleeve (6) is flexible; 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 butted 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 adapted to each other; the lower wedge block (4), the upper wedge block (3) and the wire sleeve (6) are placed in the lower locking component (5), and the upper locking component (1) is locked with the lower locking component (5) to perform cold pressing butt joint on the two cold pressing surfaces of the end to be butted.

2. The square copper wire cold-pressing butt-jointing device 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-ended structures, and an O-ring (2) is provided between the inner side of the upper locking component (1) and the end to be butted in the wire sleeve (6) to ensure the sealing of the butted end.

3. The square copper wire cold-pressing butt-jointing device according to claim 2, characterized in that: Sealing glue is evenly applied around the O-ring (2).

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

5. The square copper wire cold-pressing butt joint device according to any one of claims 1 to 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 square copper wire cold-pressing butt joint device according to claim 5, characterized in that: The material of the wire sleeve (6) is copper.

7. The square copper wire cold-pressing butt joint device according to any one of claims 1 to 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 butt jointing using the square copper wire cold-pressing butt jointing device according to any one of claims 1 to 7.

9. A pulse magnet having a square copper wire wound thereon, characterized in that: The end portions of the square copper wires to be joined are provided with the square copper wire cold-pressed joining device described in any one of claims 1 to 7, or the end portions to be joined are cold-pressed joined by the method described in claim 8.

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