Crosslinked cable conductor joint

Abstract

The utility model relates to the technical field of cable connection, in particular to a cross-linked cable conductor joint. Comprising a first crimping pipe and a second crimping pipe. A first crimping cavity is formed in one side of the first crimping pipe, a clamping head is fixedly arranged on the other side of the first crimping pipe, and the first crimping pipe and the clamping head are fixedly connected through a connecting section; a second crimping cavity is formed in one side of the second crimping pipe, a first clamping groove and a second clamping groove which are communicated with each other are formed in the other side of the second crimping pipe, and openings communicated with the outside are formed in the side directions of the first clamping groove and the second clamping groove; the inner diameter of the second clamping groove is larger than that of the first clamping groove, so that a step is formed between the first clamping groove and the second clamping groove. Aiming at the technical problem that the existing conductor connection mode has defects, the rapid and firm connection between the two conductors can be realized by utilizing the clamping connection between the first crimping pipe and the second crimping pipe, so that the continuous, safe and stable continuous production of the cable is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable connection technical field, concretely relates to a crosslinked cable conductor joint. BACKGROUND

[0002] The production and manufacture of high-voltage crosslinked polyethylene insulated power cables generally involve two production processes, namely VCV (vertical) crosslinking production process and CCV (catenary) crosslinking production process. Because the equipment for producing and processing cables has a length limit in the process of producing conductors, only specific lengths can be produced according to the machine type, so both of these two production process technologies cannot do without the large-length superimposed connection production method, that is, multiple conductors need to be connected together during the production and manufacturing process to ensure the continuity of the production process.

[0003] However, the large-length superimposed production of cables must currently be completed by using manual butt joint technology, and often involves the use of conductor joints. The existing conductor joints generally use pin joint pipes, which are fixedly connected by pins when in use. This method mainly has the following deficiencies: the pin joint pipe is only suitable for small-sized cables, and when producing large-sized cables with a length of 2500 mm (20 tons of 700 m in weight) and above, the pin joint pipe is easily deformed or pulled apart due to the heavy weight of the wire core, causing the wire core to fall from a high altitude, which results in immeasurable economic and safety losses and cannot meet the production requirements. 2 (700m heavy 20 tons) and above, the pin joint pipe is easily deformed or pulled apart due to the heavy weight of the wire core, causing the wire core to fall from a high altitude, which results in immeasurable economic and safety losses and cannot meet the production requirements. TECHNICAL CONTENT

[0004] In view of the technical problems of the defects of the existing conductor connection method, the utility model provides a crosslinked cable conductor joint, wherein the first compression fitting pipe and the second compression fitting pipe can be respectively connected with two conductors, and then the clamping connection between the first compression fitting pipe and the second compression fitting pipe can be used to quickly and firmly connect the two conductors, so as to ensure the continuous, safe and stable production of the cable.

[0005] The utility model provides a technical scheme for: a kind of crosslinked cable conductor joint, including first crimping pipe and second crimping pipe;The side of the first crimping pipe is provided with first crimping cavity, and the other side of the first crimping pipe is fixedly provided with chuck, and the first crimping pipe and the chuck are fixedly connected by connecting section, and the outer diameter of the chuck is greater than the outer diameter of the connecting section;The side of the second crimping pipe is provided with second crimping cavity, and the other side of the second crimping pipe is provided with first clamping groove and second clamping groove that are interconnected, and the second clamping groove is located at the side of the first clamping groove close to the second crimping cavity, and the first clamping groove and second clamping groove are provided with opening that is communicated with the outside;The inner diameter of the second clamping groove is greater than the inner diameter of the first clamping groove, so as to form step between the first clamping groove and second clamping groove;When the first crimping pipe and the second crimping pipe are connected, the connecting section is located in the first clamping groove, the chuck is located in the second clamping groove, and the step is in abutment with the chuck.

[0006] Optionally, the first crimping cavity and the second crimping cavity are both provided with internal thread.

[0007] Optionally, the thread depth of the internal thread is 0.5mm, and the pitch is 2mm.

[0008] Optionally, the first crimping pipe is provided with a narrow transition section near the connecting section, and the diameter of the narrow transition section gradually decreases from the side where the first crimping cavity is located to the connecting section.

[0009] Optionally, when the first crimping pipe and the second crimping pipe are connected, the outer side of the first crimping pipe and the second crimping pipe is wrapped with rubber belt, the outer side of the rubber belt is wrapped with semi-conductive nylon belt, and the outer side of the semi-conductive nylon belt is wrapped with non-woven fabric.

[0010] Optionally, the end of the first crimping cavity and the second crimping cavity is provided with internal chamfer.

[0011] Optionally, the end of the first crimping cavity and the second crimping cavity is provided with external chamfer.

[0012] Optionally, the first crimping pipe and the second crimping pipe are both made of 45# steel.

[0013] Compared with the prior art, the utility model has the following beneficial effects: in view of the technical problem that the existing conductor connection mode has defects, the first crimping pipe and the second crimping pipe in the utility model can be respectively connected with two conductors, and then the clamping between the first crimping pipe and the second crimping pipe can be used to quickly and firmly connect the two conductors, so as to ensure continuous, safe and stable production of the cable. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 A structure schematic diagram of the crosslinked cable conductor joint is provided for the embodiment of the utility model.

[0015] Figure 2 A side view structure schematic diagram of the first crimping pipe is provided for the embodiment of the utility model.

[0016] Figure 3 A side view structure schematic diagram of the second crimping pipe is provided for the embodiment of the utility model.

[0017] Figure 4 A front view structure schematic diagram of the second crimping pipe is provided for the embodiment of the utility model. DETAILED DESCRIPTION

[0018] In order to further understand the content of the utility model, the utility model is described in detail in combination with the drawings and the embodiments.

[0019] The application will be described in further detail below in combination with the drawings and the embodiments. It can be understood that the specific embodiments described herein are only used to explain the related utility model, and not to limit the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for the convenience of description. The terms first, second, and the like in the utility model are set for the convenience of describing the technical scheme of the utility model, and do not have a specific limiting effect, and all refer to the technical scheme of the utility model. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. In the description of the utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, and it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. The multiple technical schemes in the same embodiment, and the multiple technical schemes of different embodiments can be arranged and combined to form new technical schemes without contradiction or conflict, which are within the scope of protection of the utility model.

[0020] In combination with the drawings Figures 1-4 The embodiment provides a cross-linked cable conductor joint which comprises a first compression pipe 1 and a second compression pipe 2; one side of the first compression pipe 1 is provided with a first compression cavity 10, and the other side of the first compression pipe 1 is fixedly provided with a clamp 11; the first compression pipe 1 and the clamp 11 are fixedly connected through a connecting section 12; and the outer diameter of the clamp 11 is greater than the outer diameter of the connecting section 12.

[0021] One side of the second compression pipe 2 is provided with a second compression cavity 20, and the other side of the second compression pipe 2 is provided with a first clamping groove 21 and a second clamping groove 22 which are in communication with each other; the second clamping groove 22 is located on the side of the first clamping groove 21 close to the second compression cavity 20; and the first clamping groove 21 and the second clamping groove 22 are laterally provided with an opening 23 which is in communication with the outside world; the inner diameter of the second clamping groove 22 is greater than the inner diameter of the first clamping groove 21, so that a step 24 is formed between the first clamping groove 21 and the second clamping groove 22. When the first compression pipe 1 and the second compression pipe 2 are connected, the connecting section 12 is located in the first clamping groove 21, the clamp 11 is located in the second clamping groove 22, and the step 24 abuts against the clamp 11.

[0022] The cross-linked cable conductor joint of the embodiment is applied to the large-length superposition production of cables, and the application mode is as follows: first, two conductors to be connected are taken, the conductor end portions are sawed neat by using a cutting machine, then the original non-woven fabric and nylon belt of the conductors are peeled off at a position about 500 mm away from the end head, and the conductors are tightly tied by using copper wires at a position 200-500 mm away from the end head. Similarly, for the split conductors, the strands are separated, the outermost copper wires of each strand are sawed off, and then the strands are tightly tied again by using copper wires.

[0023] Then, the first compression pipe 1 and the second compression pipe 2 are respectively installed on the end heads of the two conductors: after the cable end heads are treated, a suitable first compression pipe 1 is selected, whether the first compression pipe 1 to be used is qualified is checked, then the first compression pipe 1 is sleeved on one of the conductors through the first compression cavity 10, and it is determined that the end head of the conductor is located at the bottom (i.e. the deepest position) of the first compression cavity 10, then the tail end position of the first compression pipe 1 is tightly pressed by using a compression machine, and the tightness is appropriate when the surface copper wire is deformed but not broken, and the pressure is preferably controlled at 60-70 MPa. Then, the second compression pipe 2 is installed on the other conductor, that is, the second compression pipe 2 is sleeved on the conductor through the second compression cavity 20, and then the compression machine is used for pressing, and the whole process is similar to the installation of the first compression pipe 1, and details are not described herein.

[0024] The first compression pipe 1 and the second compression pipe 2 must be tightly compressed on the conductors, if the one-time compression cannot meet the requirements, a larger compression die can be used for first compression, and then a suitable die is used for compression, and the compression position of the small compression die should be located behind the compression position of the large compression die.

[0025] After crimping, the crimping condition should be carefully checked to make sure that there is no abnormal deformation and the crimping is not in place, including ear-like corners, cracks, cracking, looseness, etc. Once any adverse phenomena are found, the work should be returned immediately for processing.

[0026] Then polish the sawn copper wire outside the two conductors with a polisher, and the polished surface should be smooth and flat, and the inner conductor should form a smooth transition. The outer diameter should be smaller than the inner diameter of the co-extrusion head die core to prevent the copper wire from being stuck in the die. Then rewrap a layer of semiconductive nylon tape and non-woven fabric on the conductor surface after removing the non-woven fabric and nylon tape, making sure to wrap tightly without wrinkles, and use semiconductive tape to paste.

[0027] After the conductor is processed, the first crimping pipe 1 and the second crimping pipe 2 are clamped together, i.e. the connecting section 12 is clamped into the first clamping groove 21, and the clamping head 11 is clamped into the second clamping groove 22. After the first crimping pipe 1 and the second crimping pipe 2 are connected, pull them with force to ensure that the step 24 abuts against the clamping head 11. Then wrap rubber tape 3 on the surface of the first crimping pipe 1 and the second crimping pipe 2, and wrap semiconductive nylon tape 4 on the surface of the rubber tape 3.

[0028] The cross-linked cable conductor joint of the embodiment has high connection strength and can be applied to large-size cables with a diameter of 2500mm 2 and above. The cross-linked cable conductor joint of the embodiment enables quick and firm connection between two conductors during large-length superposition production of the cable, thereby ensuring continuous, safe and stable production of the cable.

[0029] In a preferred embodiment, the first crimping pipe 1 and the second crimping pipe 2 are made of 45# steel to ensure their strength and the connection strength of the conductors.

[0030] In an embodiment, the first crimping cavity 10 and the second crimping cavity 20 are provided with internal threads, which can increase the friction between the first crimping pipe 1 and the second crimping pipe 2 and the conductors, thereby ensuring that the first crimping pipe 1 and the second crimping pipe 2 are tightly fitted with the conductors and are not easy to come off. Preferably, the thread depth of the internal threads is 0.5mm, and the pitch is 2mm.

[0031] In an embodiment, the first crimping pipe 1 is provided with a narrow transition section 13 near the connecting section 12, and the diameter of the narrow transition section 13 gradually decreases from the side where the first crimping cavity 10 is located to the connecting section 12. In this way, the connecting section 12 and the clamping head 11 can be more conveniently inserted into the first clamping groove 21 and the second clamping groove 22, and the weight of the second crimping pipe 2 can be reduced, saving materials.

[0032] In other embodiments, the ends of the first and second crimping cavities 10 and 20 are provided with internal chamfers 6, the presence of which can cause the ends of the first and second crimping cavities 10 and 20 to form a certain degree of counterboring, thereby more facilitating the insertion of the conductors inside the first and second crimping cavities 10 and 20.

[0033] In another embodiment, the ends of the first and second crimping cavities 10 and 20 are provided with external chamfers 7, the presence of which can cause the ends of the conductors to fit the conductors more closely when inserted into the first and second crimping cavities 10 and 20, avoiding the presence of obvious misaligned protrusions, thereby improving the appearance of the product, avoiding affecting continuous production, and also avoiding damage to the cable structure caused by the misaligned protrusions.

[0034] In summary, in view of the technical problems of the defects of the existing conductor connection method, the first and second crimping pipes 1 and 2 in the utility model can be respectively connected with two conductors, and then the clamping between the first and second crimping pipes 1 and 2 can be used to quickly and firmly connect the two conductors. This connection method improves the work efficiency of workers, and the structure of the cross-linked cable conductor joint can meet the production needs of 2500mm 2 and above large-size cables, thereby ensuring the continuous, safe and stable continuous production of the cable, reducing waste and scrap, and greatly reducing costs.

[0035] The utility model and its embodiments are described above, and the description is not limiting. The drawings shown are only one of the embodiments of the utility model, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the above, without departing from the spirit of the utility model, similar structural methods and embodiments can be designed without creativity, which should belong to the protection scope of the utility model.

Claims

1. A crosslinked cable conductor joint, characterized in that, The first crimping pipe (1) and the second crimping pipe (2) are provided with a first crimping cavity (10) on one side of the first crimping pipe (1), and a clamping head (11) is fixedly arranged on the other side of the first crimping pipe (1), and the first crimping pipe (1) and the clamping head (11) are fixedly connected through a connecting section (12), and the outer diameter of the clamping head (11) is greater than the outer diameter of the connecting section (12). The second crimping pipe (2) is provided with a second crimping cavity (20) on one side, and a first clamping groove (21) and a second clamping groove (22) are arranged on the other side of the second crimping pipe (2) and are in communication with each other, the second clamping groove (22) is located on the side of the first clamping groove (21) close to the second crimping cavity (20), and an opening (23) in communication with the outside is arranged on the side of the first clamping groove (21) and the second clamping groove (22); the inner diameter of the second clamping groove (22) is greater than the inner diameter of the first clamping groove (21), so that a step (24) is formed between the first clamping groove (21) and the second clamping groove (22). When the first crimping pipe (1) and the second crimping pipe (2) are connected, the connecting section (12) is located in the first clamping groove (21), the clamping head (11) is located in the second clamping groove (22), and the step (24) abuts against the clamping head (11). The first crimping cavity (10) and the second crimping cavity (20) are provided with internal threads.

2. A crosslinked cable conductor joint according to claim 1, characterised in that The thread depth of the internal thread is 0.5mm, and the pitch is 2mm.

3. A crosslinked cable conductor joint according to claim 2, characterised in that The first crimping pipe (1) is provided with a narrow transition section (13) near the connecting section (12), and the diameter of the narrow transition section (13) gradually decreases from the side where the first crimping cavity (10) is located to the connecting section (12).

4. A crosslinked cable conductor joint according to claim 1, characterized in that When the first crimping pipe (1) and the second crimping pipe (2) are connected, the outer side of the first crimping pipe (1) and the second crimping pipe (2) is wrapped with a rubber belt (3), the outer side of the rubber belt (3) is wrapped with a semi-conductive nylon belt (4), and the outer side of the semi-conductive nylon belt (4) is wrapped with a non-woven fabric (5).

5. A crosslinked cable conductor joint according to claim 1, characterized in that The end of the first crimping cavity (10) and the second crimping cavity (20) is provided with an internal chamfer (6).

6. A crosslinked cable conductor joint according to claim 1, characterized in that The end of the first crimping cavity (10) and the second crimping cavity (20) is provided with an external chamfer (7).

7. A crosslinked cable conductor joint according to claim 1, characterized in that The first crimping pipe (1) and the second crimping pipe (2) are made of 45 steel.

8. A crosslinked cable conductor joint according to claim 1, characterized in that ​

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