Connection joint of split conductor and connection method thereof

Abstract

The invention provides a connector for a split conductor, and the connector comprises a first connecting pipe which comprises a first conductor cavity and an insertion groove which are arranged at intervals in the axial direction, the first conductor cavity is communicated with one end of the first connecting pipe, and the insertion groove is communicated with the other end of the first connecting pipe; the second connecting pipe comprises a main body part and a connecting plug, and the connecting plug is connected to one end of the main body part; a second conductor cavity is formed in the main body part and is communicated to one end, deviating from the connecting plug, of the main body part; wherein the connecting plug is inserted into the inserting groove, and the connecting plug is in close fit with the inserting groove. According to the connection joint of the split conductor, the split conductor is connected in a crimping mode through plugging cooperation, the connection mode is simple, the connection position is movable, the internal stress of the conductor can be released in the traction process, the conductor strand is prevented from being deformed, and the product quality and the production efficiency are improved.

Description

Technical Field

[0001] The present application relates to the technical field of cable connection, and in particular to a connection joint for split conductors and a connection method thereof. Background Art

[0002] In cable production, due to the limitations of the take-up reel size, conductor weight and total cable length, it is often necessary to connect multiple conductors during the continuous production of the insulation process to ensure the continuity of the production process.

[0003] At present, split conductors are usually connected through joint tubes, and commonly used joint tubes are parent-child type joint tubes, which use pins to achieve fixed connection. This method is simple and direct and is widely used in cable production.

[0004] However, the operation of the female-and-child joint pipe is complicated, and the connection is easy to loosen or break, which affects product quality and production efficiency. Summary of the invention

[0005] In view of the above problems, the embodiment of the present application provides a connection joint for split conductors and a connection method thereof. The connection joint for split conductors is connected by crimping the split conductors through plug-in fitting. The connection method is simple and the connection is movable. The internal stress of the conductor can be released during the pulling process to prevent the conductor strands from being deformed, thereby improving product quality and production efficiency.

[0006] In order to achieve the above objectives, the present application provides the following technical solutions:

[0007] One aspect of the present application provides a connecting joint for split conductors, comprising: a first connecting tube, comprising a first conductor cavity and a plug-in slot which are separated along the axial direction, the first conductor cavity being connected to one end of the first connecting tube, and the plug-in slot being connected to the other end of the first connecting tube; a second connecting tube, comprising a main body and a plug-in connector, the plug-in connector being connected to one end of the main body; a second conductor cavity is provided in the main body, the second conductor cavity being connected to an end of the main body which is away from the plug-in connector; wherein the plug-in connector is inserted into the plug-in slot, and the plug-in connector and the plug-in slot are tightly matched.

[0008] In a possible embodiment, the plug-in slot includes a connected plug-in section and a snap-in section, the plug-in section is located between the snap-in section and the first conductor cavity; and a first step surface is provided between the plug-in section and the snap-in section, the first step surface faces the plug-in section; the plug connector includes a connecting portion and an end portion, one end of the connecting portion is connected to the main body portion, and the end portion is connected to an end of the connecting portion facing away from the main body portion; and a second step surface is provided between the end portion and the connecting portion, the second step surface faces the connecting portion.

[0009] In a possible implementation, a plug interface is provided on the groove wall of the plug-in section, the assembly port is connected to the outer wall surface of the first connecting pipe, and the plug connector is inserted into the plug-in groove from the plug interface.

[0010] In a possible implementation manner, the cross-sectional area of ​​the connecting portion gradually increases from one end where the connecting portion is connected to the end portion to the other end of the connecting portion.

[0011] In a possible implementation manner, a surface of a side of the end head portion facing away from the connecting portion is a spherical surface.

[0012] In a possible embodiment, a plurality of first partitions are provided on the inner wall of the first conductor cavity, and each first partition extends from one end of the first conductor cavity toward the plug-in slot to the other end of the first conductor cavity; a plurality of second partitions are provided on the inner wall of the second conductor cavity, and each second partition extends from one end of the second conductor cavity toward the plug-in connector to the other end of the second conductor cavity.

[0013] In a possible implementation, each first partition is evenly spaced along the circumference of the first conductor cavity, and the first partition extends spirally along the inner wall surface of the first conductor cavity;

[0014] The second partitions are evenly spaced along the circumference of the second conductor cavity, and the second partitions extend spirally along the inner wall surface of the second conductor cavity.

[0015] In a possible implementation manner, the port of the first conductor cavity and the port of the second conductor cavity are both bell-shaped.

[0016] Another aspect of the present application provides a method for connecting split conductors, comprising: providing a first conductor and a second conductor, and performing surface treatment on the end surface of the first conductor and the end surface of the second conductor; starting from the end of the first conductor, removing a preset length of the protective layer of the first conductor; and, starting from the end of the second conductor, removing a preset length of the protective layer of the second conductor; screwing the end of the first conductor into a first conductor cavity of a first connecting tube to a preset depth, and screwing the end of the second conductor into a second conductor cavity of a second connecting tube to a preset depth; placing the first connecting tube into a mold of a hydraulic press, crimping the first connecting tube with the first conductor installed, and gradually moving the end of the first conductor to abut against the end of the first conductor cavity; placing the second connecting tube into the mold, crimping the second connecting tube with the second conductor installed, and gradually moving the end of the second conductor to abut against the end of the second conductor cavity; inserting the plug connector of the second connecting tube into the plug slot of the first connecting tube; crimping the portion where the plug slot is located by a hydraulic press to crimp the first connecting tube and the second connecting tube.

[0017] In a possible embodiment, screwing the end of the first conductor into the first conductor cavity of the first connecting tube to a preset depth includes: inserting the strands of the first conductor into the gaps between the first partitions of the first conductor cavity, and gradually screwing the first conductor into the first conductor cavity; screwing the end of the second conductor into the second conductor cavity of the second connecting tube to a preset depth includes: inserting the strands of the second conductor into the gaps between the second partitions of the second conductor cavity, and gradually screwing the second conductor into the second conductor cavity.

[0018] In a possible implementation manner, after the first connecting tube and the second connecting tube are crimped and connected, the method further includes: wrapping insulating tape around the first connecting tube and the second connecting tube; and wrapping adhesive tape around the insulating tape.

[0019] In a possible implementation manner, the cross-sectional shape of the mold is a regular polygon with 8 or more sides.

[0020] The present application provides a connection joint and a connection method for a split conductor, wherein the connection joint for the split conductor includes a first connection tube and a second connection tube, wherein the first connection tube is provided with a first conductor cavity, and the second connection tube is provided with a second conductor cavity, and two split conductors are respectively inserted into the first conductor cavity and the second conductor cavity. By providing a plug-in slot at one end of the first connection tube and a plug connector at one end of the second connection tube, the plug connector of the second connection tube can be inserted into the plug-in slot of the first connection tube, and the plug connector and the plug-in slot are tightly matched through a crimping process, thereby completing the connection of the split conductor. In this way, the connection joint for the split conductor is combined with the plug connector and the plug-in slot, and the connection method is simple and easy to operate. Moreover, the connection between the plug connector and the plug-in slot is movable, so that the conductor can release the internal stress during the traction process and prevent the conductor strands from being deformed. Thus, the connection quality and production efficiency of the split conductor are improved.

[0021] In addition to the technical problems solved by the embodiments of the present application, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the shelves and storage systems provided by the embodiments of the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1A schematic diagram of the structure of a connection joint for a split conductor provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of the structure of a first connecting pipe provided in an embodiment of the present application;

[0025] Figure 3 A schematic diagram of the structure of a second connecting pipe provided in an embodiment of the present application;

[0026] Figure 4 A schematic cross-sectional view of a first conductor cavity (or a second conductor cavity) provided in an embodiment of the present application;

[0027] Figure 5 This is a flowchart of the steps of the method for connecting split conductors provided in an embodiment of the present application.

[0028] Description of reference numerals:

[0029] 10-Connection joint of split conductor;

[0030] 100-first connecting pipe; 200-second connecting pipe;

[0031] 110 - first conductor cavity; 120 - plug-in slot; 130 - first conductor; 210 - main body; 220 - plug-in connector; 230 - second conductor;

[0032] 111-first partition; 121-insertion section; 122-card section; 123-first step surface; 211-second conductor cavity; 221-connection section; 222-end section; 223-second step surface;

[0033] 2111-Second partition. DETAILED DESCRIPTION

[0034] As described in the background technology, in the continuous production process of cable insulation, it is often necessary to connect multiple conductors to ensure the continuity of the production process. However, the commonly used joint pipe operation steps are complicated, and the crimping process is prone to conductor deformation, loose strands, and overall joint detachment, which leads to serious safety hazards and brings great economic losses.

[0035] In order to solve the above problems, the present application provides a connection joint and a connection method for a split conductor, wherein the connection joint for the split conductor comprises a first connection tube and a second connection tube, wherein the first connection tube is provided with a first conductor cavity and the second connection tube is provided with a second conductor cavity, and two split conductors are respectively inserted into the first conductor cavity and the second conductor cavity. By providing a plug-in slot at one end of the first connection tube and a plug connector at one end of the second connection tube, the plug connector of the second connection tube can be inserted into the plug-in slot of the first connection tube, and the plug connector and the plug-in slot are tightly matched through a crimping process, thereby completing the connection of the split conductor. In this way, the connection joint for the split conductor is combined with the plug connector and the plug-in slot, and the connection method is simple and easy to operate. Moreover, the connection between the plug connector and the plug-in slot is movable, so that the internal stress of the conductor can be released during the traction process to prevent the conductor strands from being deformed. Thereby, the connection quality and production efficiency of the split conductor are improved.

[0036] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0037] Figure 1 This is a schematic diagram of the structure of the connection joint of the split conductor provided in the embodiment of the present application. Figure 1 As shown, the embodiment of the present application provides a connection joint 10 for dividing conductors (hereinafter referred to as the connection joint), which can be used to connect and extend conductors. For example, it can be used to connect conductors in a continuous production process of an insulation process, or it can also be used to connect a new conductor segment when a part of the conductor is damaged, thereby repairing the line without replacing the entire line.

[0038] The connecting joint 10 includes a first connecting tube 100 and a second connecting tube 200. The first connecting tube 100 and the second connecting tube 200 are both used to connect the split conductors. The first connecting tube 100 and the second connecting tube 200 can be locked with each other to complete the connection of the two split conductors.

[0039] like Figure 1 As shown in , for the convenience of description, in this embodiment, the split conductor connected to the first connection tube 100 is defined as the first conductor 130 , and the split conductor connected to the second connection tube 200 is defined as the second conductor 230 .

[0040] Among them, the materials of the first connecting tube 100 and the second connecting tube 200 can have good plasticity, and the specific materials of the first connecting tube 100 and the second connecting tube 200 are not limited in this embodiment. Exemplarily, the materials of the first connecting tube 100 and the second connecting tube 200 can be Q235 low carbon steel. In addition, the inner diameter of the first connecting tube 100 can be greater than the inner diameter of the first conductor 130, for example, the difference between the inner diameter of the first connecting tube 100 and the outer diameter of the first conductor 130 can be 0.8mm~1.0mm. The wall thickness of the first connecting tube can be set to 2.0mm~3.0mm, and the overall length can be 80mm~90mm. Similarly, the inner diameter of the second connecting tube 200 can be greater than the inner diameter of the second conductor 230, for example, the difference between the inner diameter of the second connecting tube 200 and the outer diameter of the second conductor 230 can be 0.8mm~1.0mm. The wall thickness of the second connecting tube can be set to 2.0mm~3.0mm, and the overall length can be 80mm~90mm.

[0041] Figure 2 This is a schematic diagram of the structure of the first connecting pipe provided in the embodiment of the present application. Figure 2 As shown, the first connecting tube 100 includes a first conductor cavity 110 , which is communicated with one end of the first connecting tube 100 , and is used to accommodate and fix the first conductor 130 .

[0042] In a possible implementation, the port of the first conductor cavity 110 may be configured as a bell mouth to facilitate the insertion of the first conductor 130. For example, the opening size of the port of the first conductor cavity 110 may be 1.0 mm to 1.5 mm larger than the inner diameter of the first conductor cavity 110.

[0043] The first connecting tube 100 further includes an inserting slot 120, which is connected to the other end of the first connecting tube 100 and is used to connect to the second connecting tube 200. The inserting slot 120 and the first conductor cavity 110 are separated from each other.

[0044] The plug slot 120 may include a plug section 121 and a clamping section 122, the plug section 121 and the clamping section 122 are connected to each other, and the plug section 121 is located between the clamping section 122 and the first conductor cavity 110. In a possible implementation, a plug interface may be provided on the slot wall of the plug section 121, and the plug interface is connected to the outer wall surface of the first connecting pipe 100.

[0045] Figure 3 This is a schematic diagram of the structure of the second connecting pipe provided in the embodiment of the present application. Figure 3As shown, the second connecting tube 200 includes a main body 210 and a plug connector 220, and the plug connector 220 is connected to one end of the main body 210 away from the second conductor cavity 211. The main body 210 has a second conductor cavity 211, which is connected to one end of the main body 210 away from the plug connector 220, and the second conductor cavity 211 is used to accommodate and fix the second conductor 230.

[0046] In a possible implementation, the port of the second conductor cavity 211 may be configured as a bell mouth to facilitate the insertion of the second conductor 230. For example, the opening size of the port of the second conductor cavity 211 may be 1.0 mm to 1.5 mm larger than the inner diameter of the second conductor cavity 211.

[0047] In addition, the plug connector 220 may include a connecting portion 221 and a terminal portion 222 , wherein one end of the connecting portion 221 is connected to the main body 210 , and the terminal portion 222 is connected to an end of the connecting portion 221 away from the main body 210 .

[0048] Combination Figure 2 and Figure 3 As shown, a first step surface 123 may be provided between the plug section 121 and the clamping section 122, and the first step surface 123 faces the plug section 121. A second step surface 223 may be provided between the end section 222 and the connecting section 221, and the second step surface 223 faces the connecting section 221.

[0049] The plug connector 220 can be inserted into the plug section 121 through the plug interface, and the plug connector 220 is tightened. Due to the abutment between the first step surface 123 and the second step surface 223, the plug connector 220 can be fixed in the plug slot 120 and fit tightly with the plug slot 120.

[0050] In a possible implementation, the surface of the end portion 222 facing away from the connection portion 221 can be set to a spherical surface. Compared with the currently commonly used female-and-child joint tube, a fixed connection is generally achieved through a latch. This connection method is very prone to breakage when passing through the guide wheel, and cannot release the stress inside the conductor. The end portion 222 of this embodiment can rotate flexibly in the plug slot 120, which can release the internal stress during the traction process, prevent the strands in the split conductor from being deformed during the traction process of the split conductor, and can increase the eccentricity of the insulating core.

[0051] Of course, in order to achieve a better connection between the first connecting tube 100 and the second connecting tube 200, facilitate the insertion of the plug connector 220 into the plug section 121, and enhance the structural strength, the connecting portion 221 can be configured as a tapered transition type. That is, from one end where the connecting portion 221 is connected to the end head 222 to the other end of the connecting portion 221, the cross-sectional area of ​​the connecting portion 221 can be gradually increased. In addition, the connecting portion 221 is configured as a tapered transition type, so that the area of ​​the end where the connecting portion 221 is connected to the end head 222 is smaller, and a step surface can be formed, thereby cooperating with the clamping section 122.

[0052] Figure 4 This is a cross-sectional schematic diagram of the first conductor cavity (or second conductor cavity) provided in an embodiment of the present application. Figure 4 As shown, taking the first conductor cavity 110 of the first connecting tube 100 as an example, a plurality of partitions may be provided in the first conductor cavity 110 of this embodiment. Similarly, taking the second conductor cavity 211 of the second connecting tube 200 as an example, a plurality of partitions may be provided in the second conductor cavity 211 of this embodiment.

[0053] Compared with the current mother-and-child type connecting tube, its conductor cavity is usually a single cavity design. When passing through the guide wheel, the strands are prone to loosening due to uneven force. Once loose, there may be a risk of the entire joint falling off, resulting in abnormal equipment shutdown and causing greater losses.

[0054] In this embodiment, a plurality of partitions are provided on the inner wall of the first conductor cavity 110 (or the second conductor cavity 211 ), so that each strand of the first conductor 130 (or the second conductor 230 ) is relatively independent.

[0055] Among them, the first partitions 111 arranged on the inner wall of the first conductor cavity 110 can be evenly spaced along the circumference of the first conductor cavity 110, and each first partition 111 spirally extends from one end of the first conductor cavity 110 toward the plug-in slot 120 to the other end of the first conductor cavity 110.

[0056] Similarly, a plurality of second partitions 2111 are arranged on the inner wall of the second conductor cavity 211. The second partitions 2111 are evenly spaced along the circumference of the second conductor cavity 211. Each second partition 2111 spirally extends from one end of the second conductor cavity 211 toward the plug connector 220 toward the other end of the second conductor cavity 211.

[0057] During production, each strand of the conductor is individually inserted into each first partition 111 or second partition 2111. This arrangement allows each partition to correspond to a strand, and each strand can be relatively independent after crimping, thereby enhancing the stability of the strand. During the production process, even if one of the strands is loose, the remaining strands can still be firmly fixed on the connecting tube and will not fall off, thereby ensuring that the continuity of production is not affected and improving production efficiency.

[0058] Combination Figures 2 to 4 As shown, in order to facilitate the insertion of the first conductor 130 into the first conductor cavity 110 and the second conductor 230 into the second conductor cavity 221, a partition may not be provided at the port of the first conductor cavity 110 and the port of the second conductor cavity 211, that is, the partition may not extend to the ports of the first conductor cavity 110 and the second conductor cavity 221.

[0059] The present application also provides a method for connecting split conductors. Figure 5 This is a flowchart of the steps of the method for connecting the split conductors provided in the embodiment of the present application. Figure 5 As shown, the experimental method includes the following steps:

[0060] S100: Provide a first conductor and a second conductor, and perform surface treatment on an end surface of the first conductor and an end surface of the second conductor.

[0061] When preparing for conductor connection, it is first necessary to ensure the flatness of the conductor end surface. To this end, before connection, the end surfaces of the first conductor 130 and the second conductor 230 are first surface treated. In a possible implementation, a band saw can be used to cut the end of the first conductor 130 and the end of the second conductor 230 to ensure that the end surfaces of the first conductor 130 and the second conductor 230 to be connected are flat and correct. After cutting, use a file to carefully grind the end of the first conductor 130 and the end of the second conductor 230 at an angle of 45 degrees. This step can not only remove burrs that may be generated during the cutting process, but also make the ends of the first conductor 130 and the second conductor 230 form a certain tapered angle to facilitate subsequent connection work.

[0062] S200, starting from an end of the first conductor, removing a preset length of the protective layer of the first conductor; and starting from an end of the second conductor, removing a preset length of the protective layer of the second conductor.

[0063] After the end of the first conductor 130 (or the second conductor 230) is polished, a throat clamp may be used to tighten the first conductor 130 (or the second conductor 230) at a position about 30 cm to 40 cm away from the end face. The use of the throat clamp can ensure the stability of the conductor during the connection process and prevent the conductor from loosening after the strands are subsequently loosened.

[0064] Afterwards, remove the protective layer on the first conductor 130 (or the second conductor 230) to expose the strands of the first conductor 130 (or the second conductor 230). Exemplarily, the protective layer may include a protective tape and a semi-conductive tape. Loosen the strands of the first conductor 130 (or the second conductor 230) and fix each strand at a position 2 mm to 3 mm away from the end of the first conductor 130 (or the second conductor 230). Use a cutter to remove the center conductor of the first conductor 130 (or the second conductor 230) to reduce the outer diameter of the first conductor 130 (or the second conductor 230). After the cutting of the center conductor is completed, the connection of the first conductor 130 (or the second conductor 230) is restored along the position of the first throat clamp, and the throat clamp is used again to fix it at a position about 10 cm away from the end of the first conductor 130 (or the second conductor 230) to facilitate the subsequent extension of the first conductor 130 into the first connecting tube 100 or the extension of the second conductor 230 into the second connecting tube 200.

[0065] Since the first conductor 130 and the second conductor 230 will extend forward for a distance after respectively extending into the first conductor cavity 110 and the second conductor cavity 211 during crimping, a preset length needs to be reserved in advance to ensure that the first conductor 130 and the second conductor 230 can be accurately connected to the first connecting tube 100 and the second connecting tube 200. For example, a caliper can be used to measure the depth of the first connecting tube 100 and the second connecting tube 200, and a mark can be made at a position 3mm to 5mm in front of the corresponding point on the first conductor 130 and the second conductor 230. This mark will serve as a reference point for the first conductor 130 to extend into the first connecting tube 100 and the second conductor 230 to extend into the second connecting tube 200.

[0066] S300, screwing the end of the first conductor into the first conductor cavity of the first connecting tube to a preset depth, and screwing the end of the second conductor into the second conductor cavity of the second connecting tube to a preset depth.

[0067] Separate the strands of the first conductor 130 and the second conductor 230, insert the strands of the first conductor 130 into the gaps between the first partitions 111 of the first conductor cavity 110, and gradually screw the first conductor 130 into the first conductor cavity 110. After reaching the first throat hoop, loosen the throat hoop, move the throat hoop to the marked position and tighten it, and continue to insert it until the first connecting pipe 100 enters the marked position.

[0068] Similarly, the strands of the second conductor 230 are respectively inserted into the gaps between the second partitions 2111 of the second conductor cavity 211, and the second conductor 230 is gradually screwed into the second conductor cavity 211. After reaching the first throat clamp, loosen the throat clamp, move the throat clamp to the marked position and tighten it, and continue to insert until the second connecting pipe 200 enters the marked position.

[0069] S400, placing the first connecting tube into a mold of a hydraulic press, crimping the first connecting tube with the first conductor installed thereon, and gradually moving the end of the first conductor to abut against the end of the first conductor cavity.

[0070] First, place half of the crimping die into the hydraulic press die slot, align the end of the first connecting tube 100 with the crimping die, and then place the other half of the crimping die and clamp it. For example, during crimping, two staff members can cooperate with each other, one is responsible for operating the hydraulic press, and the other observes the distance between the die and the first connecting tube 100 and the first conductor 130. During the first crimping process, the hydraulic press crimps the first connecting tube 100 to a slightly deformed state to reduce the gap between the conductor filaments, and gradually moves the crimping position toward the end of the first connecting tube 100 until it reaches the end position of the first connecting tube 100. During the second crimping, the first conductor 130 is deformed and the surface filaments are not broken. Move the crimping machine toward the end of the first conductor 130. The surface of the first connecting tube 100 should be crimped flat, and the outer diameter of the first connecting tube 100 is less than or equal to the outer diameter of the first conductor 130.

[0071] S500, placing the second connecting tube into the mold, crimping the second connecting tube with the second conductor installed thereon, and gradually moving the end of the second conductor to abut against the end of the second conductor cavity.

[0072] Place half of the crimping die into the hydraulic press die slot, align the end of the second connecting tube 200 with the crimping die, and then place the other half of the crimping die and clamp it. The hydraulic press crimps the second connecting tube 200 to a slightly deformed state to reduce the gap between the single wires of the second conductor 230, and gradually moves the crimping position toward the end of the second connecting tube 200 until the end of the second connecting tube 200 is reached to complete the first crimping. Move the crimping machine toward the end of the second conductor 230, so that the surface of the second connecting tube 200 should be crimped flat, the conductor is deformed, the surface single wires are not broken, and the outer diameter of the second connecting tube 200 is less than or equal to the outer diameter of the second conductor 230 to complete the second crimping.

[0073] It is understandable that, in actual operation, the order of S400 and S500 can be interchanged. That is, the first conductor 130 and the first connecting tube 100 can be crimped first, and then the second conductor 230 and the second connecting tube 200 can be crimped. Alternatively, the second conductor 230 and the second connecting tube 200 can be crimped first, and then the first conductor 130 and the first connecting tube 100 can be crimped.

[0074] In a possible implementation, the pressure range during crimping can be controlled between 85 MPa and 100 MPa. In addition, the crimping can be performed multiple times as long as the surfaces of the first connecting tube 100 and the second connecting tube 200 are smooth and the surface monofilaments are continuous.

[0075] It should be noted that after the first connecting tube 100 and the second connecting tube 200 are crimped, it is necessary to check the surface of the first connecting tube 100 and the second connecting tube 200 to ensure that there are no ears, edges, cracks, looseness, etc. on the surface, and the outer diameter of the first connecting tube 100 and the second connecting tube 200 shall not be greater than the diameter of the first conductor 130 and the second conductor 230.

[0076] S600, inserting the plug connector of the second connecting pipe into the plug slot of the first connecting pipe.

[0077] Insert the plug connector 220 of the second connecting pipe 200 into the plug section 121 through the plug interface of the first connecting pipe 100, tighten the plug connector 220, and due to the abutment between the first step surface 123 and the clamping section 122, the plug connector 220 can be fixed in the plug groove 120 and fit tightly with the plug groove 1230.

[0078] S700, using a hydraulic press to crimp the location of the plug-in slot to crimp and connect the first connecting pipe and the second connecting pipe.

[0079] A hydraulic press is used to evenly crimp the joint of the first connecting tube 100 and the second connecting tube 200. After the crimping is completed, the outer diameter of the crimped joint is measured to ensure that the outer diameter of the crimped joint is smaller than the outer diameter of the conductor.

[0080] Check whether there are ear-shaped, angular, cracked, loose, etc. on the surface of the joint between the first connecting tube 100 and the second connecting tube 200. After ensuring that there is no abnormality, wrap the insulating tape on the surface of the first connecting tube 100 and the second connecting tube 200. For example, you can start wrapping the surface with terylene tape after stripping the wrapped conductor to prevent the connection joint 10 from short-circuiting after entering the preheater. Of course, in order to further fix the first connecting tube 100 and the second connecting tube 200 and prevent the first conductor 130 from falling off from the first connecting tube 100 or the second conductor 230 from falling off from the second connecting tube 200, you can wrap another layer of strong tape on the surface.

[0081] It should be noted that the crimping die used in the embodiments of the present application can be a regular polygon with a cross-sectional shape of 8 or more sides. Compared with the currently commonly used hexagonal crimping die, in order to make the surface of the connecting tube round and smooth, it is usually necessary to shake the hydraulic press left and right during the crimping process. This operation not only increases the labor intensity of the operator, but also easily causes the conductor to deform. Once the conductor is deformed, it may scratch the core when passing through the insulating extrusion die, thereby causing overall jitter. This jitter can cause abnormal phenomena such as bamboo-like or eccentricity in the insulation layer, and it usually takes about 10 meters to restore stability, resulting in significant material waste.

[0082] Therefore, in this embodiment, the crimping mold is set to a regular polygon with a cross-sectional shape having 8 sides or more. During the crimping process, the first connecting tube 100, the second connecting tube 200 and the joints therebetween can be directly crimped and rounded without shaking the hydraulic press as a whole, thereby eliminating the impact of shaking.

[0083] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0084] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A connection joint for split conductors, characterized in that: include: A first connecting tube (100) comprising a first conductor cavity (110) and a plug-in slot (120) which are separated and arranged along the axial direction, wherein the first conductor cavity (110) is connected to one end of the first connecting tube (100), and the plug-in slot is connected to the other end of the first connecting tube (100); The second connecting tube (200) comprises a main body (210) and a plug connector (220), wherein the plug connector (220) is connected to one end of the main body (210); a second conductor cavity (211) is provided in the main body (210), and the second conductor cavity (211) is connected to one end of the main body (210) away from the plug connector (220); The plug connector (220) is inserted into the plug slot (120), and the plug connector (220) and the plug slot (120) are tightly matched.

2. The connection joint according to claim 1, characterized in that: The plug-in slot (120) comprises a plug-in section (121) and a clamping section (122) which are connected to each other, the plug-in section (121) being located between the clamping section (122) and the first conductor cavity (110); and a first step surface (123) is provided between the plug-in section (121) and the clamping section (122), the first step surface (123) facing the plug-in section (121); The plug connector (220) comprises a connecting portion (221) and an end portion (222), wherein one end of the connecting portion (221) is connected to the main body (210), and the end portion (222) is connected to an end of the connecting portion (221) that is away from the main body (210); and a second step surface (223) is provided between the end portion (222) and the connecting portion (221), and the second step surface (223) faces the connecting portion (221).

3. The connection joint according to claim 2, characterized in that: The slot wall of the plug section (121) is provided with an insertion port, the insertion port is connected to the outer wall surface of the first connecting pipe (100), and the plug connector (220) is inserted into the plug slot (120) from the insertion port.

4. The connection joint according to claim 2, characterized in that: From one end of the connecting portion (221) connected to the end portion (222) to the other end of the connecting portion (221), the cross-sectional area of ​​the connecting portion (221) gradually increases.

5. The split conductor connection joint according to claim 2, characterized in that: The surface of the end portion (222) facing away from the connecting portion (221) is a spherical surface.

6. The connection joint according to any one of claims 1 to 5, characterized in that: A plurality of first partitions (111) are provided on the inner wall of the first conductor cavity (110), and each of the first partitions (111) extends from one end of the first conductor cavity (110) facing the plug slot (120) to the other end of the first conductor cavity (110); A plurality of second partitions are provided on the inner wall of the second conductor cavity (211), and each of the second partitions extends from one end of the second conductor cavity (211) facing the plug connector (220) to the other end of the second conductor cavity (211).

7. The connection joint according to claim 6, characterized in that: The first partitions (111) are evenly spaced along the circumference of the first conductor cavity (110), and the first partitions (111) extend spirally along the inner wall surface of the first conductor cavity (110); The second partitions are arranged at even intervals along the circumference of the second conductor cavity (211), and the second partitions extend spirally along the inner wall surface of the second conductor cavity (211).

8. The connection joint according to any one of claims 1 to 5, characterized in that: The port of the first conductor cavity (110) and the port of the second conductor cavity (211) are both bell-shaped.

9. A method for connecting split conductors, applied to the connection joint according to any one of claims 1 to 8, characterized in that: The connection method includes: Providing a first conductor (130) and a second conductor (230), and performing surface treatment on the end surface of the first conductor (130) and the end surface of the second conductor (230); Starting from the end of the first conductor (130), a preset length of the protective layer of the first conductor (130) is removed; and starting from the end of the second conductor (230), a preset length of the protective layer of the second conductor (230) is removed; Screw the end of the first conductor (130) into the first conductor cavity (110) of the first connecting tube (100) to a preset depth, and screw the end of the second conductor (230) into the second conductor cavity (211) of the second connecting tube (200) to a preset depth; Placing the first connecting tube (100) into a mold of a hydraulic press, crimping the first connecting tube (100) with the first conductor (130) installed thereon, and gradually moving the end of the first conductor (130) to abut against the end of the first conductor cavity (110); placing the second connecting tube (200) into the mold, crimping the second connecting tube (200) with the second conductor (230) installed thereon, and gradually moving the end of the second conductor (230) to abut against the end of the second conductor cavity (211); Inserting the plug connector (220) of the second connecting pipe (200) into the plug slot (120) of the first connecting pipe (100); The location of the plug groove (120) is crimped by a hydraulic press to crimp and connect the first connecting pipe (100) and the second connecting pipe (200).

10. The connection method according to claim 9, characterized in that: Screwing the end of the first conductor (130) into the first conductor cavity (110) of the first connecting tube (100) to a preset depth, comprising: Inserting the strands of the first conductor (130) into the gaps between the first partitions (111) of the first conductor cavity (110), and gradually screwing the first conductor (130) into the first conductor cavity (110); Screwing the end of the second conductor (230) into the second conductor cavity (211) of the second connecting tube (200) to a preset depth, comprising: The strands of the second conductor (230) are respectively inserted into the gaps between the second partitions of the second conductor cavity, and the second conductor (230) is gradually screwed into the second conductor cavity.

11. The connection method according to claim 9, characterized in that: After the first connecting tube (100) and the second connecting tube (200) are crimped and connected, the method further comprises: Winding insulating tape around the first connecting tube (100) and the second connecting tube (200); Wrap adhesive tape around the insulating tape.

12. The connection method according to claim 9, characterized in that: The cross-sectional shape of the mold is a regular polygon with 8 or more sides.

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