Crosslinked polyethylene insulated cable welding type joint

Abstract

The utility model discloses a cross-linked polyethylene insulated cable welding type joint, which relates to the technical field of cable joints and comprises a copper core, a cable core semi-conductive shielding layer is arranged on the side wall of the copper core, and a cross-linked polyethylene insulating layer is arranged on the outer side wall of the cable core semi-conductive shielding layer. A cable core wire waterproof belt is arranged on the outer side wall of the crosslinked polyethylene insulating layer, a cable core metal shielding layer is arranged on the outer side wall of the cable core wire waterproof belt, an inner protection layer is arranged on the outer side wall of the cable core metal shielding layer, a steel armor is arranged on the outer side wall of the inner protection layer, and a rubber layer is arranged on the outer side wall of the steel armor. A rotating seat is rotated to drive a second connecting block to extrude a sealing block, so that the inner wall of the sealing block is tightly attached to the outer side wall of a rubber layer, meanwhile, the outer wall of the sealing block is tightly attached to the inner wall of a first connecting block, and then water is prevented from passing through the connecting position; and an internal cable and an insulating layer are protected from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of cable joints, in particular to a cross-linked polyethylene insulated cable fusion joint. Background Art

[0002] Polyethylene (PE) cross-linking technology is one of the important means to improve its material properties. The cross-linked modified PE can greatly improve its performance, not only significantly improving the mechanical properties, environmental stress cracking resistance, chemical corrosion resistance, creep resistance and electrical properties of PE, but also cross-linked polyethylene insulated cable uses chemical or physical methods to transform the cable insulation polyethylene molecules from a linear molecular structure to a main network molecular structure, that is, thermoplastic polyethylene is transformed into thermosetting cross-linked polyethylene, thereby greatly improving its heat resistance and mechanical properties, reducing its shrinkage, making it no longer melt after being heated, and maintaining excellent electrical properties. The current insulated cable joints have poor waterproof effect. When the cable joints leak water, it is easy to cause serious safety accidents and affect power supply.

[0003] For example, the patent with announcement number CN209169925 discloses a cross-linked polyethylene fusion-type insulated cable joint, comprising a cable joint body, the cable joint body comprising a cable, a cable joint waterproof layer and a joint outer protective sleeve, the cable being located in the center of the joint outer protective sleeve, and a cable joint waterproof layer being provided between the cable and the joint outer protective sleeve. The above-mentioned cross-linked polyethylene fusion-type insulated cable joint has shortcomings. Although the device achieves waterproofing of the cable joint, it has limitations. The setting mainly utilizes a clamping claw to clamp the clamping ring to increase the sealing performance. However, the clamping claw is very likely to undergo irreversible deformation due to excessive rotation of the anti-loosening tightening nut by the worker, which requires frequent replacement of the clamping claw, increasing maintenance costs and operational complexity.

[0004] Therefore, in order to solve such problems, we propose a cross-linked polyethylene insulated cable fusion joint. Utility Model Content

[0005] The purpose of the utility model is to provide a cross-linked polyethylene insulated cable fusion joint, aiming to solve the problem in the above-mentioned background technology that the existing cross-linked polyethylene insulated cable joints are easily deformed due to the worker's excessive rotation of the anti-loosening tightening nut during use, which increases the maintenance cost.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a cross-linked polyethylene insulated cable fusion joint, comprising a copper core, the side wall of the copper core is provided with a cable core semi-conductive shielding layer, the outer wall of the cable core semi-conductive shielding layer is provided with a cross-linked polyethylene insulation layer, the outer wall of the cross-linked polyethylene insulation layer is provided with a cable core conductor waterproof tape, the outer wall of the cable core conductor waterproof tape is provided with a cable core metal shielding layer, the outer wall of the cable core metal shielding layer is provided with an inner protective layer, the outer wall of the inner protective layer is provided with steel armor, the outer wall of the steel armor is provided with a rubber layer, the outer wall of the rubber layer is fixedly sleeved with a connecting seat, the upper end of the connecting seat is fixedly connected to a first connecting block, the outer wall of the first connecting block is threadedly connected to a rotating seat, the inner top wall of the rotating seat is fixedly connected to a second connecting block, and the inner wall of the first connecting block is abutted against a sealing block.

[0007] Preferably, the side wall of the connecting seat is evenly provided with a plurality of first mounting grooves, the side wall of the rotating seat is evenly provided with a plurality of second mounting grooves, the side wall of the connecting seat is fixedly connected with three limit plates by bolts, the angles between the two limit plates are equal, and the end of the limit plate away from the first mounting groove is engaged with the second mounting groove.

[0008] Preferably, a rubber sleeve is sleeved on the side wall of the rubber layer, and one end of the rubber sleeve is fixedly connected to an end of the connecting seat away from the rotating seat.

[0009] Preferably, the upper end of the connecting seat is fixedly connected to a second rubber ring, and the lower end of the rotating seat is fixedly connected to a first rubber ring.

[0010] Preferably, a sealing ring is fixedly connected to the inner side wall of the connecting seat.

[0011] Preferably, the side wall of the limiting plate away from the rotating seat is arc-shaped.

[0012] The utility model has the following beneficial effects:

[0013] In the utility model, the rotating seat is directly rotated to drive the second connecting block to squeeze the sealing block, so that the inner wall of the sealing block is tightly attached to the outer wall of the rubber layer. At the same time, the outer wall of the sealing block is tightly attached to the inner wall of the first connecting block, thereby preventing water from passing through the connection and causing a safety accident. The operator only needs to simply rotate the rotating seat to complete the sealing process. Secondly, a steel armor is provided between the inner protective layer and the rubber layer, so that it can effectively resist external pressure, impact and wear, and protect the internal cable and insulation layer from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a three-dimensional schematic diagram of a cross-linked polyethylene insulated cable fusion joint proposed by the present invention;

[0015] Figure 2 This is a three-dimensional exploded schematic diagram of a cross-linked polyethylene insulated cable fusion joint proposed by the utility model;

[0016] Figure 3 This is a three-dimensional schematic diagram of the internal structure of a rotating seat in a cross-linked polyethylene insulated cable fusion joint proposed by the present invention;

[0017] Figure 4 This is a three-dimensional schematic diagram of a first connecting block in a cross-linked polyethylene insulated cable fusion joint proposed by the present invention;

[0018] Figure 5 The utility model provides a cross-sectional view of a cable in a cross-linked polyethylene insulated cable fusion joint.

[0019] Legend:

[0020] 1. Copper core; 11. Semi-conductive shielding layer of cable core; 12. Cross-linked polyethylene insulation layer; 13. Waterproof tape for cable core conductor; 14. Metal shielding layer of cable core; 15. Inner protective layer; 16. Steel armor; 17. Rubber layer; 2. Connecting seat; 201. First mounting groove; 202. Second rubber ring; 203. Sealing ring; 21. First connecting block; 22. Rotating seat; 221. Second mounting groove; 222. First rubber ring; 23. Second connecting block; 24. Sealing block; 3. Limiting plate; 31. Rubber sleeve. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," "outside," etc., indicating positions or positional relationships, are based on the positions or positional relationships shown in the accompanying drawings and are used only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific position, be constructed and operate in a specific position. Therefore, they should not be understood as limiting the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrally connected. They can be mechanically connected or electrically connected. They can be directly connected, indirectly connected through an intermediate medium, or can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0023] Reference Figure 1-5 The utility model provides an embodiment: a cross-linked polyethylene insulated cable fusion joint, comprising a copper core 1, the side wall of the copper core 1 is provided with a cable core semi-conductive shielding layer 11, the outer wall of the cable core semi-conductive shielding layer 11 is provided with a cross-linked polyethylene insulation layer 12, the outer wall of the cross-linked polyethylene insulation layer 12 is provided with a cable core conductor waterproof tape 13, the outer wall of the cable core conductor waterproof tape 13 is provided with a cable core metal shielding layer 14, the outer wall of the cable core metal shielding layer 14 is provided with an inner protective layer 15, the outer wall of the inner protective layer 15 is provided with a steel armor 16, the outer wall of the steel armor 16 is provided with a rubber layer 17, the outer wall of the rubber layer 17 is fixedly sleeved with a connecting seat 2, the upper end of the connecting seat 2 is fixedly connected to a first connecting block 21, the outer wall of the first connecting block 21 is threadedly connected to a rotating seat 22, the inner top wall of the rotating seat 22 is fixedly connected to a second connecting block 23, and the inner wall of the first connecting block 21 is abutted against a sealing block 24.

[0024] This arrangement rotates the rotating seat 22 so that the rotating seat 22 drives the second connecting block 23 to rotate inside the first connecting block 21, and gradually squeezes the sealing block 24 toward one end of the first connecting block 21 close to the connecting seat 2, so that the inner wall of the sealing block 24 is in close contact with the outer wall of the rubber layer 17, and at the same time, the outer wall of the sealing block 24 is in close contact with the inner wall of the first connecting block 21, thereby preventing water from passing through the connection and causing a safety accident.

[0025] The side walls of the connecting seat 2 are evenly provided with a number of first mounting grooves 201, and the side walls of the rotating seat 22 are evenly provided with a number of second mounting grooves 221. The side walls of the connecting seat 2 are fixedly connected with three limit plates 3 by bolts, and the angles between the two limit plates 3 are equal. The end of the limit plate 3 away from the first mounting groove 201 is engaged with the second mounting groove 221, and is used to limit the connecting seat 2 and the rotating seat 22 by using the three limit plates 3 to be respectively inserted into the first mounting groove 201 and the second mounting groove 221 by bolts, thereby avoiding relative rotation between the connecting seat 2 and the rotating seat 22.

[0026] The side wall of the rubber layer 17 is sleeved with a rubber sleeve 31, and one end of the rubber sleeve 31 is fixedly connected to the end of the connecting seat 2 away from the rotating seat 22. The rubber sleeve 31 is used to utilize the elasticity of the rubber sleeve 31 to make the rubber sleeve 31 close to the outside of the rubber layer 17, thereby increasing the sealing performance of the connection between the connecting seat 2 and the rubber layer 17.

[0027] The upper end of the connecting seat 2 is fixedly connected to a second rubber ring 202 , and the lower end of the rotating seat 22 is fixedly connected to a first rubber ring 222 , which is used to increase the sealing performance of the connection between the upper end of the connecting seat 2 and the lower end of the rotating seat 22 by abutting the second rubber ring 202 and the first rubber ring 222 .

[0028] A sealing ring 203 is fixedly connected to the inner wall of the connecting seat 2 to further increase the sealing performance of the connection between the connecting seat 2 and the rubber layer 17 to prevent water seepage.

[0029] The side wall of the limiting plate 3 away from the rotating seat 22 is arc-shaped, which is used to increase the smoothness of the side walls of the connecting seat 2 and the rotating seat 22 to prevent workers from being scratched by the protrusion of the limiting plate 3.

[0030] Working principle: First, by rotating the rotating seat 22, the rotating seat 22 drives the second connecting block 23 to rotate inside the first connecting block 21, and gradually squeezes the sealing block 24 toward the end of the first connecting block 21 close to the connecting seat 2. The inner wall of the sealing block 24 is close to the outer wall of the rubber layer 17, and the outer wall of the sealing block 24 is close to the inner wall of the first connecting block 21, thereby preventing water from passing through the connection. Then, three limiting plates 3 are respectively bolted into the first mounting groove 201 and the second mounting groove 221, thereby limiting the connecting seat 2 and the rotating seat 22 to prevent relative rotation between the connecting seat 2 and the rotating seat 22.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cross-linked polyethylene insulated cable fusion joint, comprising a copper core (1), characterized in that: The copper core (1) is provided with a cable core semi-conductive shielding layer (11) on its side wall, a cross-linked polyethylene insulation layer (12) is provided on its outer side wall, a cable core conductor waterproof tape (13) is provided on its outer side wall, a cable core conductor waterproof tape (13) is provided on its outer side wall, an inner protective layer (15) is provided on its outer side wall, a steel armor (16) is provided on its outer side wall, a rubber layer (17) is provided on its outer side wall, a connecting seat (2) is fixedly sleeved on its outer side wall, the connecting seat (2) is fixedly connected with a first connecting block (21) on its upper end, a rotating seat (22) is threadedly connected to its outer side wall on its outer side wall, a second connecting block (23) is fixedly connected to its inner top wall on its inner side wall, and a sealing block (24) is abutted against its inner side wall on its inner side wall.

2. The cross-linked polyethylene insulated cable fusion joint according to claim 1, characterized in that: The side wall of the connecting seat (2) is evenly provided with a plurality of first mounting grooves (201), the side wall of the rotating seat (22) is evenly provided with a plurality of second mounting grooves (221), the side wall of the connecting seat (2) is fixedly connected with three limiting plates (3) by bolts, the angles between the two limiting plates (3) are equal, and the end of the limiting plate (3) away from the first mounting groove (201) is engaged with the second mounting groove (221).

3. The cross-linked polyethylene insulated cable fusion joint according to claim 1, characterized in that: The side wall of the rubber layer (17) is sleeved with a rubber sleeve (31), and one end of the rubber sleeve (31) is fixedly connected to an end of the connecting seat (2) away from the rotating seat (22).

4. The cross-linked polyethylene insulated cable fusion joint according to claim 1, characterized in that: The upper end of the connecting seat (2) is fixedly connected to a second rubber ring (202), and the lower end of the rotating seat (22) is fixedly connected to a first rubber ring (222).

5. The cross-linked polyethylene insulated cable fusion joint according to claim 1, characterized in that: A sealing ring (203) is fixedly connected to the inner side wall of the connecting seat (2).

6. The cross-linked polyethylene insulated cable fusion joint according to claim 2, characterized in that: The side wall of the limiting plate (3) away from the rotating seat (22) is arc-shaped.

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