A cold-shrinkable cable terminal head and its manufacturing method
The cold shrink cable terminal adjusts internally based on temperature changes using a spiral spring and magnetic elements to prevent rainwater ingress, enhancing performance in adverse weather.
Patent Information
- Application Number
- CN202211565155.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-12-07
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2042-12-07
AI Technical Summary
The existing cold-shrink cable terminal cannot be adjusted internally according to the temperature during rainy and snowy weather, which may cause rainwater to enter the cable terminal, affecting use.
A cold-condensing cable terminal is designed, including cable connecting shells, equipment boxes, solenoids, elastic airbags and magnetic sheets. By inducing temperature changes, the movement of the guide plate and connectors is adjusted, the inner ring protective layer is squeezed to prevent rainwater from entering, and automatic closure is achieved using temperature sensing structure and magnetic attraction.
Automatically close the cable terminal when the temperature drops to prevent rainwater from entering, ensure that the cable terminal works normally in harsh environments and has good waterproof performance.
Smart Images
Figure CN116231574B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of cable terminal heads, and specifically to a cold-shrinkable cable terminal head and a manufacturing method thereof. Background Art
[0002] A cold-shrinkable cable terminal head is a component that uses an elastomer material to be injection-molded and vulcanized in a factory, and then is expanded in diameter and lined with a plastic spiral support to form various cable accessories. During on-site installation, these pre-expanded sleeves are sleeved on the processed end or joint of the cable, and the internal plastic spiral strip for support is withdrawn and pressed tightly on the cable insulation to form a cable accessory. Because it relies on elastic retraction force at normal temperature, rather than using fire heating for shrinkage like heat-shrinkable cable accessories, it is commonly known as a cold-shrinkable cable accessory. The cable terminal head integrates waterproofing, stress control, shielding, and insulation, has good electrical and mechanical properties, can be used for a long time under various harsh environmental conditions, and has the advantages of light weight and convenient installation. The cable terminal head is widely used in various fields such as electric power, petrochemical industry, metallurgy, railway ports, and construction. Existing cable terminal heads cannot be internally adjusted according to temperature during use, and rainwater may enter the interior of the cable terminal head during rainy and snowy weather, affecting the use of the cable terminal head. For this reason, this application proposes a cold-shrinkable cable terminal head and a manufacturing method thereof. Summary of the Invention
[0003] (1) Technical Problems to be Solved
[0004] In view of the deficiencies of the prior art, the present invention provides a cold-shrinkable cable terminal head and a manufacturing method thereof, which have the advantages of being able to close and fasten the cable terminal head according to temperature, and solve the problems that existing cable terminal heads cannot be internally adjusted according to temperature during use, and rainwater may enter the interior of the cable terminal head during rainy and snowy weather, affecting the use of the cable terminal head.
[0005] (2) Technical Solutions
[0006] To achieve the above object, the present invention provides the following technical solution: A cold-shrinkable cable terminal head includes a cable connection shell, an equipment box is fixedly installed on the outer side of the cable connection shell, a solenoid is arranged inside the equipment box, a first spring is arranged outside the solenoid, one end of the first spring away from the cable connection shell is fixedly connected to a connecting member, a magnetic sheet is fixedly installed on the side of the connecting member close to the first spring and on the same horizontal line as the solenoid, an induction structure is arranged on the outer side of the cable connection shell and below the equipment box, an elastic airbag is arranged inside the induction structure, a guide sheet is arranged above the elastic airbag, a lightweight plate is closely attached to the lower side of the elastic airbag, an induction block is fixedly installed on the outer side of the elastic airbag, and the induction block is electrically connected to the guide sheet;
[0007] According to the above technical solution, when the induction block senses a decrease in the external temperature, it causes the guide piece to gradually conduct electricity and gradually start to expand. After the guide piece expands, it squeezes the elastic airbag. After the elastic airbag is squeezed and compressed by a certain volume, it will continue to press down and drive the conductive column to move downward. After the conductive column moves downward, the resistance value of the sliding rheostat connected to the circuit becomes smaller. According to the relationship between current and resistance, when the resistance becomes smaller, the current connected to the solenoid becomes larger, and the magnetism at both ends of the solenoid is enhanced, thereby attracting the magnetic piece fixed on the connecting piece, and then driving the connecting piece to move together in the direction of the cable connection shell. The connecting piece drives the top block to move and squeeze the inner ring protective layer.
[0008] Preferably, an inner ring protective layer is provided on the inner wall of the cable connection shell, a square groove is opened inside the cable connection shell, the inner ring protective layer is made of an elastic material, a cable main body is provided inside the cable connection shell, and a cable joint is fixedly connected to the top of the cable main body;
[0009] According to the above technical solution, the elastic material of the inner ring protective layer is convenient for telescopic deformation and can also prevent external rainwater from entering the inside of the cable connection shell.
[0010] Preferably, a limiting block is provided on the side of the connecting piece away from the magnetic piece, the limiting block is fixedly connected to the inner wall of the equipment box, and a cable terminal head is provided inside the top block;
[0011] According to the above technical solution, when the top block squeezes the inner ring protective layer, it protrudes during extrusion and fits against the outer wall of the cable terminal head and wraps the cable terminal head, preventing rainwater from entering the shell of the cable terminal head along the gap between the cable terminal head and the inner wall of the cable connection shell.
[0012] Preferably, a conductive column and a second spring are fixedly connected to the lower surface of the light board, a sliding rheostat is provided at one end of the conductive column close to the inner wall of the induction structure, and the sliding rheostat is electrically connected to the solenoid;
[0013] According to the above technical solution, the light board makes the deformation of the induction elastic airbag faster. When the elastic airbag is not under external pressure and returns to its initial state, it will restore the guide piece and the baffle below it to their initial states, and the second spring will also restore the conductive column to its initial state.
[0014] Preferably, a cold-shrinkable cable terminal head and its manufacturing method include the following manufacturing method,
[0015] S1. Prepare materials for the cable connection shell, inner ring protective layer, cable main body, and cable terminal head;
[0016] S2. Construct a cable protection shell with the cable connection shell as the main body;
[0017] S3. First, place the cable body inside the cable connection housing, and then place the cable body inside the cable connection housing again;
[0018] S4. Finally, install the equipment box and the induction structure on the outside of the cable connection housing.
[0019] Compared with the prior art, the present invention provides a cold-shrinkable cable terminal head and a manufacturing method thereof, having the following beneficial effects:
[0020] 1. In the cold-shrinkable cable terminal head and the manufacturing method thereof, when the induction block senses a decrease in the external temperature, it will cause the guide piece to gradually conduct electricity and gradually start to expand. After the guide piece expands, it will squeeze the elastic airbag. After the elastic airbag is squeezed and compressed by a certain volume, it will continue to press down and drive the conductive column to move downward. After the conductive column moves downward, the resistance value of the sliding rheostat connected to the circuit will become smaller. According to the relationship between current and resistance, when the resistance becomes smaller, the current flowing into the solenoid becomes larger, and the magnetism at both ends of the solenoid is enhanced, thereby attracting the magnetic sheet fixed on the connecting piece, and then driving the connecting piece to move together in the direction of the cable connection housing. The connecting piece drives the top block to move and squeeze the inner ring protective layer. The elastic material of the inner ring protective layer is convenient for telescopic deformation and can also block external rainwater from entering the inside of the cable connection housing. When the top block squeezes the inner ring protective layer, it protrudes and then adheres to the outer wall of the cable terminal head and wraps the cable terminal head, preventing rainwater from entering the shell of the cable terminal head along the gap between the cable terminal head and the inner wall of the cable connection housing.
[0021] 2. In the cold-shrinkable cable terminal head and the manufacturing method thereof, the lightweight plate makes the deformation of the induction elastic airbag faster. When the elastic airbag returns to its initial state without external pressure, it will restore the guide piece and the baffle below it to their initial states, and the second spring will also restore the conductive column to its initial state, so that the device can be restored and does not start working at a higher temperature. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a front sectional view schematic diagram of the structure of the present invention;
[0023] Figure 2 It is a top sectional view schematic diagram of the top block and its related structure of the present invention;
[0024] Figure 3 It is a partial schematic diagram of the induction structure of the present invention
[0025] Figure 4 It is a schematic diagram of the internal structure of the equipment box of the present invention.
[0026] Among them: 100, cable connection shell; 101, inner ring protective layer; 102, square groove; 200, cable main body; 201, cable joint; 300, equipment box; 400, solenoid; 401, first spring; 402, connecting piece; 403, magnetic sheet; 404, limiting block; 405, top block; 500, cable terminal head; 600, induction structure; 700, elastic airbag; 701, conducting sheet; 702, induction block; 703, light plate; 704, conducting column; 705, sliding rheostat; 706, second spring. Detailed implementation manners
[0027] 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0028] Please refer to Figures 1-4 , a cold-shrinkable cable terminal head, including a cable connection shell 100, an equipment box 300 is fixedly installed on the outer side of the cable connection shell 100, a solenoid 400 is arranged inside the equipment box 300, a first spring 401 is arranged outside the solenoid 400, one end of the first spring 401 away from the cable connection shell 100 is fixedly connected to a connecting piece 402, a magnetic sheet 403 is fixedly installed on the side of the connecting piece 402 close to the first spring 401 and on the same horizontal line as the solenoid 400, an induction structure 600 is arranged on the outer side of the cable connection shell 100 and below the equipment box 300, an elastic airbag 700 is arranged inside the induction structure 600, a conducting sheet 701 is arranged above the elastic airbag 700, a light plate 703 is closely attached below the elastic airbag 700, an induction block 702 is fixedly installed on the outer side of the elastic airbag 700, and the induction block 702 is electrically connected to the conducting sheet 701.
[0029] Furthermore, an inner ring protective layer 101 is arranged on the inner wall of the cable connection shell 100, a square groove 102 is opened inside the cable connection shell 100, the inner ring protective layer 101 is made of an elastic material, a cable main body 200 is arranged inside the cable connection shell 100, and a cable joint 201 is fixedly connected to the top of the cable main body 200.
[0030] Furthermore, a limiting block 404 is arranged on the side of the connecting piece 402 away from the magnetic sheet 403, the limiting block 404 is fixedly connected to the inner wall of the equipment box 300, and a cable terminal head 500 is arranged inside the top block 405.
[0031] Further, a conductive post 704 and a second spring 706 are fixedly connected to the lower surface of the light board 703. A sliding rheostat 705 is arranged at one end of the conductive post 704 close to the inner wall of the induction structure 600. The sliding rheostat 705 is electrically connected to the solenoid 400.
[0032] Further, a cold-shrinkable cable terminal and a manufacturing method thereof include the following manufacturing method.
[0033] S1. Prepare materials for the cable connection shell 100, the inner ring protective layer 101, the cable main body 200, and the cable terminal 500.
[0034] S2. Construct a cable protection shell with the cable connection shell 100 as the main body.
[0035] S3. First place the cable main body 200 into the cable connection shell 100, and then place the cable main body 200 into the cable connection shell 100.
[0036] S4. Finally, install the equipment box 300 and the induction structure 600 outside the cable connection shell 100.
[0037] Embodiment 1:
[0038] In the initial state, a balance state is maintained among the guide piece 701, the elastic airbag 700, the conductive post 704, and the second spring 706. A cold-shrinkable cable terminal includes a cable connection shell 100. An equipment box 300 is fixedly installed on the outer side of the cable connection shell 100. A solenoid 400 is arranged inside the equipment box 300. A first spring 401 is arranged outside the solenoid 400. One end of the first spring 401 far from the cable connection shell 100 is fixedly connected to a connecting piece 402. A magnetic piece 403 is fixedly installed on one side of the connecting piece 402 close to the first spring 401 and on the same horizontal line as the solenoid 400. An induction structure 600 is arranged on the outer side of the cable connection shell 100 and below the equipment box 300. An elastic airbag 700 is arranged inside the induction structure 600. A guide piece 701 is arranged above the elastic airbag 700. A light board 703 is closely attached to the lower side of the elastic airbag 700. An induction block 702 is fixedly installed on the outer side of the elastic airbag 700. The induction block 702 is electrically connected to the guide piece 701.
[0039] Among them, when the induction block 702 senses a decrease in the external temperature, it will cause the guide piece 701 to be gradually energized and gradually start to expand. After the guide piece 701 expands, it will squeeze the elastic airbag 700. After the elastic airbag 700 is squeezed and compressed by a certain volume, it will continue to press down and drive the conductive column 704 to move downward. After the conductive column 704 moves downward, the resistance value of the sliding rheostat piece 705 connected to the circuit becomes smaller. According to the relationship between current and resistance, when the resistance becomes smaller, the current flowing into the solenoid 400 increases, and the magnetism at both ends of the solenoid is enhanced, thereby attracting the magnetic piece 403 fixed on the connecting piece 402, and then driving the connecting piece 402 to move together in the direction of the cable connection housing 100. The connecting piece 402 drives the top block 405 to move and squeeze the inner ring protective layer 101. The elastic material of the inner ring protective layer 101 is convenient for telescopic deformation and can also prevent external rainwater from entering the inside of the cable connection housing 100. When the top block 405 squeezes the inner ring protective layer 101, it protrudes during extrusion and fits against the outer wall of the cable terminal head 500 and wraps the cable terminal head 500, preventing rainwater from entering the shell of the cable terminal head 500 along the gap between the outer wall of the cable terminal head 500 and the inner wall of the cable connection housing 100;
[0040] Embodiment 2:
[0041] The light board 703 enables the deformation of the induction elastic airbag 700 to be faster. When the elastic airbag 700 returns to its initial state when not under external pressure, the guide piece 701 and the baffle below it will return to their initial states, and the second spring 706 will also return the conductive column 704 to its initial state, so that the device can be restored and does not start working at higher temperatures.
[0042] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A cold-shrinkable cable terminal head, comprising a cable connection shell (100), characterized in that: An equipment box (300) is fixedly installed on the outer side of the cable connection shell (100). A solenoid (400) is arranged inside the equipment box (300). A first spring (401) is arranged outside the solenoid (400). One end of the first spring (401) far away from the cable connection shell (100) is fixedly connected with a connecting piece (402). A magnetic sheet (403) is fixedly installed on one side of the connecting piece (402) close to the first spring (401) and on the same horizontal line as the solenoid (400). An induction structure (600) is arranged on the outer side of the cable connection shell (100) and below the equipment box (300). An elastic airbag (700) is arranged inside the induction structure (600). A guide sheet (701) is arranged above the elastic airbag (700). A light plate (703) is closely attached to the lower side of the elastic airbag (700). An induction block (702) is fixedly installed on the outer side of the elastic airbag (700). The induction block (702) is electrically connected with the guide sheet (701). The guide sheet (701) will expand when electrified. An inner ring protective layer (101) is arranged on the inner wall of the cable connection shell (100). A square groove (102) is formed inside the cable connection shell (100). The inner ring protective layer (101) is made of an elastic material. A cable main body (200) is arranged inside the cable connection shell (100). A cable joint (201) is fixedly connected to the top of the cable main body (200). A conductive column (704) and a second spring (706) are fixedly connected to the lower surface of the light plate (703). A sliding rheostat piece (705) is arranged at one end of the conductive column (704) close to the inner wall of the induction structure (600). The sliding rheostat piece (705) is electrically connected with the solenoid (400).
2. The cold-shrinkable cable terminal head according to claim 1, characterized in that: A limiting block (404) is arranged on one side of the connecting piece (402) far away from the magnetic sheet (403). The limiting block (404) is fixedly connected with the inner wall of the equipment box (300). A cable terminal head (500) is arranged inside the top block (405).
3. The manufacturing method of a cold-shrinkable cable terminal head according to claim 1, characterized in that: It includes the following manufacturing steps: S1. Prepare materials for the cable connection shell (100), inner ring protective layer (101), cable main body (200), and cable terminal head (500). S2. Construct a cable protection shell with the cable connection shell (100) as the main body. S3. First place the cable main body (200) into the cable connection shell (100), and then place the cable main body (200) into the cable connection shell (100). S4. Finally, install the equipment box (300) and the induction structure (600) on the outside of the cable connection shell (100).
Citation Information
Patent Citations
Sealed type separable cable joint
CN215733420U
Novel cold shrink cable terminal
CN216981501U