Insulation type cold shrinkage power cable head

Abstract

The utility model discloses an insulation type cold shrink power cable head, which belongs to the technical field of electric power engineering and cables, and comprises two cable entities, the two cable entities are connected through a joint part, the outer surface of each cable entity is provided with a cold shrink tube, and the outer surface of each cable entity is provided with a fixed sealing mechanism. The rotary handle is rotated to drive the threaded circular sleeve and the extrusion circular ring plate to move, so that the sealant can be uniformly extruded into a gap between the end part of the cold shrink tube and a cable entity through the extrusion sliding hole, perfect filling of the gap is realized, and the sealing performance is effectively improved; and meanwhile, the cold shrink tube is firmly fixed by utilizing the arc-shaped shell, the connecting plate, the hoop, the fastening bolt and other parts, so that the cold shrink tube is effectively prevented from falling off and shifting, the stability and durability of the cable head are enhanced, the insulating property of the cold shrink power cable head is further improved, and meanwhile, the potential safety hazard is also reduced.

Description

Technical Field

[0001] The utility model relates to the technical fields of electric power engineering and cable technology, and particularly relates to an insulating cold-shrinkable electric cable joint. Background Art

[0002] As a widely used cable connection method, the cold-shrinkable electric cable joint is favored by the electric power industry due to its simple installation and good insulation performance. However, after the traditional cold-shrinkable electric cable joint is installed, the sealing effect is usually achieved by squeezing sealant into the gap between the cold-shrinkable tube and the cable. Although this method is simple and easy to implement, there are still some problems in practical applications.

[0003] Specifically, when the cold-shrinkable electric cable joint is affected by the external environment, such as temperature change, mechanical vibration, etc., the cold-shrinkable tube is prone to fall off or the sealing is not tight. This not only affects the insulation performance of the cable joint, but also may cause potential safety hazards. At the same time, the process of applying sealant is usually manual operation. Due to factors such as the skill level and attention concentration of the operators, it is easy to cause uneven application of sealant, further affecting the sealing effect. Content of the Utility Model

[0004] The purpose of the utility model is to solve the problems that the cold-shrinkable electric cable joint in the prior art is prone to fall off and the sealing is not tight due to being affected by the external environment after installation, and the sealant is unevenly applied manually.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] An insulating cold-shrinkable electric cable joint includes two cable entities, the two cable entities are connected through a joint part, a cold-shrinkable tube is installed on the outer surface of the cable entity, and a fixed sealing mechanism is arranged on the outer surface of each cable entity; the fixed sealing mechanism at least includes an extrusion sleeve coaxially installed on the cable entity, the extrusion sleeve is located at one end of the cold-shrinkable tube and at least partially extends into the gap between the end of the cold-shrinkable tube and the cable entity, an interlayer for placing sealant is arranged inside the extrusion sleeve and the end far from the cold-shrinkable tube is open, and a plurality of extrusion sliding holes are evenly arranged around the inner bottom of the interlayer, and the sealant can enter the gap between the end of the cold-shrinkable tube and the cable entity through the plurality of extrusion sliding holes by extrusion.

[0007] Preferably, a threaded round sleeve is threadedly connected inside the extrusion sleeve, an extrusion ring plate is fixedly connected to the inner side surface of the threaded round sleeve, and the extrusion ring plate is slidably connected to the inside of the extrusion sleeve.

[0008] Preferably, a turning handle is fixedly connected to the right side surface of the extrusion sleeve, and an arc-shaped shell is coaxially and fixedly connected to the outer surface of the extrusion sleeve.

[0009] Preferably, at least two sliding rods are fixedly connected inside the arc-shaped shell, and a connecting plate is slidably connected to the sliding rods.

[0010] Preferably, the connecting plate is slidably connected to the inner wall of the arc-shaped shell. A clamping hoop is fixedly connected to one side of the connecting plate away from the sliding rod, and a rubber soft pad is fixedly connected to one side of the clamping hoop close to the cold-shrinkable tube.

[0011] Preferably, the rubber soft pad is in contact with the outer surface of the cold-shrinkable tube, and both ends of the clamping hoop are connected and locked by fastening bolts.

[0012] Compared with the prior art, the present utility model provides an insulating cold-shrinkable power cable head, which has the following beneficial effects.

[0013] Through the fixed sealing mechanism provided by the present utility model, uniform sealing and firm fixation of the gap between the cold-shrinkable tube and the cable entity are realized, effectively solving the problems that the traditional cold-shrinkable power cable head is easily affected by the external environment, resulting in detachment, poor sealing, and uneven manual application of sealant. Specifically, by rotating the turning handle to drive the movement of the threaded round sleeve and the extrusion ring plate, the sealant can be evenly squeezed into the gap between the end of the cold-shrinkable tube and the cable entity through the extrusion sliding holes, realizing perfect filling of the gap and effectively improving the sealing performance. At the same time, by using components such as the arc-shaped shell, connecting plate, clamping hoop, and fastening bolts, the cold-shrinkable tube is firmly fixed, effectively preventing its detachment and displacement, enhancing the stability and durability of the cable head, thereby improving the insulation performance of the cold-shrinkable power cable head and reducing potential safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional structural schematic diagram of the present utility model.

[0015] Figure 2 is a three-dimensional structural schematic diagram of the cut interior of the cold-shrinkable tube of the present utility model.

[0016] Figure 3 is a three-dimensional structural schematic diagram of the fixed sealing mechanism of the present utility model.

[0017] Figure 4 is a cross-sectional plane structural schematic diagram of the extrusion sleeve head of the present utility model.

[0018] Figure 5 is the present utility model Figure 4 The enlarged schematic diagram at A in.

[0019] Figure 6 is a three-dimensional structural schematic diagram of the extrusion sliding hole of the present utility model.

[0020] In the figure:

[0021] 1. Cable entity; 2. Cold shrinkable tube; 3. Fixed sealing mechanism; 301. Extrusion socket head; 302. Sealing glue; 303. Extrusion sliding hole; 304. Threaded round sleeve; 305. Extrusion ring plate; 306. Rotating handle; 307. Arc-shaped shell; 308. Slide bar; 309. Connecting plate; 310. Clamp; 311. Rubber soft pad; 312. Fastening bolt; 4. Joint part. Detailed implementation mode

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0023] Refer to Figures 1 - 6 , an insulating cold shrinkable power cable head, including two cable entities 1, which are connected by a joint part 4 between the two cable entities 1. A cold shrinkable tube 2 is installed on the outer surface of the cable entity 1, and a fixed sealing mechanism 3 is provided on the outer surface of each cable entity 1; the fixed sealing mechanism 3 at least includes an extrusion socket head 301 coaxially installed on the cable entity 1. The extrusion socket head 301 is located at one end of the cold shrinkable tube 2 and at least partially extends into the gap between the end of the cold shrinkable tube 2 and the cable entity 1. An interlayer for placing the sealing glue 302 is provided inside the extrusion socket head 301, and the end away from the cold shrinkable tube 2 is open. A plurality of extrusion sliding holes 303 are evenly arranged around the inner bottom of the interlayer. The sealing glue 302 can enter the gap between the end of the cold shrinkable tube 2 and the cable entity 1 through the plurality of extrusion sliding holes 303 by extrusion.

[0024] In this embodiment, the sealing glue 302 is a special colloidal substance for filling the gap between the cold shrinkable tube 2 and the cable entity 1. It has good elasticity and weather resistance and can effectively prevent the intrusion of external substances such as moisture and dust. Through the provided extrusion sliding holes 303, the sealing glue 302 can uniformly enter the gap between the end of the cold shrinkable tube 2 and the cable entity 1 through a group of extrusion sliding holes 303 by extrusion.

[0025] In some practical applications, a threaded round sleeve 304 is threadedly connected inside the extrusion socket head 301 (that is, the threaded round sleeve 304 is located in the interlayer of the extrusion socket head, and the inside of the extrusion socket head refers to the interlayer of the extrusion socket head), and an extrusion ring plate 305 is fixedly connected to the inner side surface of the threaded round sleeve 304. The extrusion ring plate 305 is slidably connected to the inside of the extrusion socket head 301.

[0026] The threaded round sleeve 304 is a component that matches the internal thread of the extrusion socket head 301. By rotating, it can drive the extrusion ring plate 305 to move inside the extrusion socket head 301, thereby realizing the uniform extrusion of the sealing glue 302.

[0027] In some practical applications, a rotary handle 306 is fixedly connected to the right side surface of the extrusion socket 301, and an arc-shaped shell 307 is coaxially and fixedly connected to the outer surface of the extrusion socket 301. At least two sliding rods 308 are fixedly connected inside the arc-shaped shell 307, and a connecting plate 309 is slidably connected to the sliding rods 308. The connecting plate 309 is slidably connected to the inner wall of the arc-shaped shell 307. A clamping hoop 310 is fixedly connected to one side of the connecting plate 309 away from the sliding rod 308, and a rubber soft pad 311 is fixedly connected to one side of the clamping hoop 310 close to the cold-shrinkable tube 2.

[0028] In this embodiment, the rubber soft pad 311 is in contact with the outer surface of the cold-shrinkable tube 2, and the two ends of the clamping hoop 310 are connected and locked by fastening bolts 312. The rotary handle 306 is a component convenient for manual operation. The rubber soft pad 311 can provide buffering and protection functions, prevent the cold-shrinkable tube 2 from being damaged, and ensure a more secure fixing effect. The fastening bolts 312 are used to fasten the cold-shrinkable tube 2.

[0029] It should be noted that, in summary, two sets of fixed sealing mechanisms 3 should be provided, one set is provided at the left end of the cold-shrinkable tube 2, and the other set is provided at the right end, in a symmetrical state.

[0030] Two arc-shaped shells 307, connecting plates 309, clamping hoops 310, rubber soft pads 311, and fastening bolts 312 are provided, and they are all arranged on the outer surface of the cold-shrinkable tube 2 in a symmetrical state. Two sliding rods 308 are arranged inside each arc-shaped shell 307.

[0031] The two clamping hoops 310 and the rubber soft pads 311 are used to connect and lock the cold-shrinkable tube 2 through two fastening bolts 312.

[0032] In summary, the working principle (or usage and operation steps) of the insulated cold-shrinkable power cable joint: When using this insulated cold-shrinkable power cable joint, first, slip two extrusion sleeves 301 onto the left and right connection parts of the cable entity 1 to be joined. Then, connect the two cable entities 1 through the joint part 4. Next, clean the outer surface of the cable entity 1 to ensure the cleanliness of the connection part. Subsequently, first install the right end of the cold-shrinkable tube 2. Install the extrusion sleeve 301 in the fixed sealing mechanism 3 at the right port of the cold-shrinkable tube 2, so that the extrusion sleeve 301 tightly wraps between the cold-shrinkable tube 2 and the cable entity 1. Next, fix the cold-shrinkable tube 2 through the arc-shaped shell 307, connecting plate 309, clamp 310, and fastening bolt 312 to prevent it from falling off. During the fixing process, first slide the connecting plate 309 along the outer surface of the sliding rod 308 until the two rubber cushions 311 tightly wrap the cold-shrinkable tube 2. Then, screw the fastening bolt 312 into the inside of the clamp 310, causing the two clamps 310 to move towards each other, thereby firmly fixing the cold-shrinkable tube 2. At the same time, the rubber cushions 311 not only protect the cold-shrinkable tube 2 but also enhance the stability of the fixation. Finally, rotate the turning handle 306, which drives the threaded round sleeve 304 to rotate, and then the threaded round sleeve 304 moves leftward inside the extrusion sleeve 301. The movement of the threaded round sleeve 304 drives the extrusion ring plate 305 to move leftward, thereby squeezing the sealant 302, and the sealant 302 is evenly squeezed into the gap between the cold-shrinkable tube 2 and the cable entity 1 through the extrusion slide hole 303, achieving a perfect filling of the gap and completing the installation of the right end of the cold-shrinkable tube 2. When installing the left end of the cold-shrinkable tube 2, the same operation is carried out.

[0033] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An insulated cold shrinkable power cable head, comprising two cable entities (1), characterized in that: The two cable entities (1) are connected via a joint (4); a cold shrink tube (2) is installed on the outer surface of the cable entity (1); and a fixed sealing mechanism (3) is provided on the outer surface of each cable entity (1); the fixed sealing mechanism (3) comprises at least one extrusion sleeve (301) coaxially installed on the cable entity (1); the extrusion sleeve (301) is located at one end of the cold shrink tube (2) and at least partially extends into the gap between the end of the cold shrink tube (2) and the cable entity (1); a partition for placing a sealant (302) is provided inside the extrusion sleeve (301) and is arranged away from the opening at one end of the cold shrink tube (2); a plurality of extrusion sliding holes (303) are evenly arranged around the inner bottom of the partition; the sealant (302) can pass through the plurality of extrusion sliding holes (303) through extrusion and enter the gap between the end of the cold shrink tube (2) and the cable entity (1).

2. The insulated cold shrinkable power cable head according to claim 1, characterized in that: The internal thread of the extrusion sleeve (301) is connected to a threaded circular sleeve (304), the inner side surface of the threaded circular sleeve (304) is fixedly connected to an extrusion circular ring plate (305), and the extrusion circular ring plate (305) is slidably connected to the inside of the extrusion sleeve (301).

3. The insulated cold shrinkable power cable head according to claim 1, characterized in that: The right side surface of the extrusion sleeve (301) is fixedly connected to a turning handle (306), and the outer surface of the extrusion sleeve (301) is coaxially fixedly connected to an arc-shaped shell (307).

4. The insulated cold shrinkable power cable head according to claim 3, characterized in that: At least two sliding rods (308) are fixedly connected inside the arc-shaped shell (307), and a connecting plate (309) is slidably connected to the sliding rods (308).

5. The insulated cold shrinkable power cable head according to claim 4, characterized in that: The connecting plate (309) is slidably connected to the inner wall of the arc-shaped shell (307); a side of the connecting plate (309) away from the sliding rod (308) is fixedly connected to a clamp (310); and a side of the clamp (310) close to the shrink tube (2) is fixedly connected to a rubber cushion (311).

6. The insulated cold shrinkable power cable head according to claim 5, characterized in that: The rubber cushion (311) is in contact with the outer surface of the cold shrink tube (2), and the two ends of the clamp (310) are connected and locked by fastening bolts (312).

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