Improved torque structure insulation terminal

Abstract

The application discloses an improved insulating connecting wire clamp with a modified torque structure and belongs to the technical field of live working of power systems. The improved insulating connecting wire clamp comprises a clamp body and a fastening assembly. The clamp body comprises an upper insulating shell and a lower insulating shell which is buckled with the upper insulating shell. The fastening assembly comprises a stress bolt, a first abutting piece arranged on the upper end surface of the upper insulating shell, a second abutting piece arranged on the lower end surface of the lower insulating shell, and a fastening block located on the lower side of the second abutting piece. The stress bolt comprises a bolt head and a screw rod. The screw rod is sequentially threaded through the first abutting piece, the upper insulating shell, the lower insulating shell, the second abutting piece and the fastening block in the buckling direction of the shells. The first abutting piece is provided with a first magnetic piece. An embedding cavity is arranged on the bolt head, and a second magnetic piece which is repulsive to the first magnetic piece is arranged in the embedding cavity. The second magnetic piece provides a continuous upward force to the close bolt head, and the torque when the bolt head is twisted off is more accurate and controllable.

Description

Technical Field

[0001] This invention belongs to the field of live-line working technology in power systems, specifically an insulated splice clamp with an improved torque structure. Background Technology

[0002] In live-line work in power systems, branch lead splice clamps play a crucial role as key components to ensure stable and safe circuit connections.

[0003] In existing technical solutions, branch lead splicing clamps for live-line working mostly adopt a "traditional mechanical fastening" structure. This involves using simple bolts and nuts to fasten the upper and lower insulating shells of the clamp body together, thereby clamping and fixing the branch lead. The operation procedure is as follows: first, place the branch lead in a suitable position within the clamp body; then, use a tool to tighten the bolts, causing the upper and lower insulating shells to gradually approach and clamp the lead, completing the splicing operation.

[0004] However, the defects of this technical solution are mainly reflected in: (1) When performing the torsion operation, it is difficult to control the torsion force on the bolt head when using external machinery or manual operation to insert the clamping component. Either the bolt cannot be torsioned due to the small torque, or the bolt head is torsioned prematurely during the clamping process between the upper and lower insulating shells due to the large torque, resulting in unstable clamping or incomplete clamping, which increases the difficulty and risk of operation.

[0005] Therefore, providing a technical solution for a branch lead splice clamp structure with controllable breaking torque for live-line work is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] The purpose of this invention is to provide an insulated splice clamp with an improved torque structure to solve the problem that the breaking torque is difficult to accurately control when the bolt breaks during the tightening process of existing branch lead splice clamps for live working.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An improved torque structure insulating splice clamp includes a clamp body and a fastening assembly. The clamp body includes an upper insulating shell and a lower insulating shell that engages with it. The fastening assembly includes a stress bolt, a first abutment plate disposed on the upper end face of the upper insulating shell, a second abutment plate disposed on the lower end face of the lower insulating shell, and a fastening block located below the second abutment plate. The stress bolt includes a bolt head and a threaded portion, the threaded portion passing sequentially through the first abutment plate, the upper insulating shell, the lower insulating shell, and the second abutment plate along the shell engagement direction and being screwed to the fastening block. The first abutment plate is provided with a first magnetic element, and the bolt head is provided with an embedded cavity, and the embedded cavity is provided with a second magnetic element that repels the magnetic force of the first magnetic element. When the stress bolt is tightened downwards, the first magnetic element extends into the embedded cavity, causing a repulsive torque to be formed between the first magnetic element and the second magnetic element.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] When the clamp body is tightened by external machinery or manual operation, the force generated at the clamping post bolt head will change, which will affect whether the clamp body is tightened. The purpose of setting the first magnetic component and the second magnetic component is to make the second magnetic component provide a continuous upward force to the nearby bolt head, hold the bolt head, make it more stable when operated by external machinery or manually, and make the breaking torque more accurate and controllable when the bolt head is broken.

[0011] Preferably, the upper insulating shell and the lower insulating shell are provided with mutually compatible upper and lower conductors; the upper conductors and the lower conductors enclose to form a cable cavity and a wire testing cavity, the upper conductors and the lower conductors are adapted to the upper insulating shell and the lower insulating shell, fit into the interior of the upper insulating shell and the lower insulating shell, and are arranged opposite to each other to form the cable cavity and the wire testing cavity.

[0012] Preferably, it further includes a plurality of push posts hinged to the lower insulating housing, the push posts being arranged in a row along the axial direction of the cable cavity, and the ends of the push posts facing the cable cavity. The push posts are hinged to the lower insulating housing in order to allow the push posts to rotate, and the pushing ends of the push posts are facing into the cable cavity, the purpose of which is to push the cable.

[0013] Preferably, the lower insulating housing is provided with a mounting cavity, and a mounting block is provided in the mounting cavity. The mounting block is located below the push column, and a plurality of spring components are provided on the mounting block. The mounting cavity is provided to provide a mounting position for the mounting block and the push column or other components. The mounting block is installed below the push column to provide a mounting position.

[0014] Preferably, the push column has a connecting part on one side that is adapted to the spring member. The spring member is connected to the connecting part so that the spring member provides support to the push column. The connecting part is connected to the head of the spring member, which makes the connection more stable and prevents deviation.

[0015] Preferably, the push column is provided with equally spaced interval slots, and the upper insulating shell is provided with abutment portions adapted to the interval slots. When the upper insulating shell and the lower insulating shell are fastened together, the abutment portions are inserted into the interval slots, causing the contact portion of the push column to move toward the lower conductor. The interval slots are adapted to the abutment portions. When the upper insulating shell is pressed down, the abutment portions pass through the interval slots, providing downward pressure to the entire push column and forming an angle with the hinged end, causing it to flip toward the center, pressing the offset cable and placing the cable in the center of the cable cavity. When the upper insulating shell is withdrawn, the provided spring member pushes the push column upward, causing the push column to return to its initial position.

[0016] Preferably, the lower conductor has a receiving cavity adapted to the push post. When the push post pushes the cable offset from the cable cavity to the center of the cavity, the push post connects with the receiving cavity. When the upper insulating shell is pressed down, the cable returns to the middle of the cable. At this time, one end of the push post slides down along the circular surface of the cable, thereby sliding into the receiving cavity. This allows the upper and lower conductors to hold the cable in place, and the sliding push post does not affect the continued closing of the upper and lower insulating shells. The contact end of the push post is arc-shaped, which can conform to the shape of the cable and slide more smoothly.

[0017] Preferably, the second magnetic component is spirally wound around the inner side of the embedded cavity. The spiral arrangement of the second magnetic component is such that when the bolt head rotates, it can correspond to the shape of the first magnetic component, avoiding direct contact between the repulsive forces of the first and second magnetic components, thus making the repulsive forces between them more moderate.

[0018] Preferably, the top of the upper insulating housing and the bottom of the lower insulating housing are provided with bearings, the screw portion passes through the bearings, and the upper and lower insulating housings are provided with mounting holes, on which the bearings are respectively installed. The bearings help to make the installation smoother and also reduce the friction generated when the stress bolts are tightened.

[0019] Preferably, the push column is made of insulating material to prevent injury due to leakage when the cable is damaged or the user comes into contact with it. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the assembly structure provided in an embodiment of the present invention;

[0022] Figure 2 A left view provided for an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the cable cavity and the wire testing cavity provided in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the fastening assembly provided in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the bolt head and the first magnetic component provided in an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the embedded cavity provided in an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of the abutment portion and the mounting cavity provided in an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of the spring and the receiving cavity provided in an embodiment of the present invention.

[0029] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0030] 11. Upper insulating shell; 12. Lower insulating shell; 13. First abutment piece; 14. Fastening block; 15. First magnetic component; 101. Bolt head; 102. Screw part; 103. Embedded cavity; 16. Second magnetic component; 17. Upper conductor; 18. Lower conductor; 104. Cable cavity; 105. Wire detector cavity; 19. Pushing column; 106. Mounting cavity; 21. Mounting block; 22. Spring component; 107. Abutment part; 108. Receiving cavity; 109. Second abutment piece.

[0031] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] See Figure 1 - Figure 7 This invention provides a branch lead splicing clamp for live-line work based on the insulating rod operation method. Through a composite structure consisting of the clamp body and fastening components, it enables the connection and reliable fixation of the branch lead.

[0034] The clamp body consists of an upper insulating shell 11 and a lower insulating shell 12 that interlock, providing insulation protection for internal conductive components and cables, ensuring personnel safety and stable equipment operation during operation. The fastening assembly includes a stress bolt (composed of a bolt head 101 and a threaded portion 102), a first abutment plate 13 located on the upper end face of the upper insulating shell 11, and a second abutment plate 109 located on the lower end face of the lower insulating shell 12, and a fastening block 14 located below the second abutment plate 109. The threaded portion 102 passes sequentially through the first abutment plate 13, the upper insulating shell 11, the lower insulating shell 12, and the second abutment plate 109 along the shell interlocking direction and is screwed onto the fastening block 14, forming a fastening structure.

[0035] By setting a first magnetic element 15 on the first abutment plate 13 and setting a second magnetic element 16 repelling the first magnetic element 15 in the embedded cavity 103 of the bolt head 101, the stability and controllability of the fastening process can be improved. This solves the problem in traditional fastening methods where the bolt head breaking torque is difficult to control due to force changes, thus affecting the clamping tightness of the clamp body. When the external mechanical or manual operation of the fastening assembly tightens the stress bolt, as the first magnetic element 15 extends into the embedded cavity 103, a repulsive torque is formed between the first magnetic element 15 and the second magnetic element 16. The second magnetic element 16 provides a continuous upward force to the nearby bolt head 101, holding the bolt head 101 in place. This makes the external operation more stable, whether mechanical or manual, and the breaking torque when the bolt head 101 breaks is more controllable.

[0036] Upper conductor 17 and lower conductor 18 are provided inside the upper insulating shell 11 and lower insulating shell 12, respectively. The upper conductor 17 and lower conductor 18 are attached to the inside of the upper insulating shell 11 and lower insulating shell 12 and are arranged opposite to each other, together forming the cable cavity 104 and the wire testing cavity 105. This can improve the adaptability and functionality of the clamp to different lines, meet the diverse needs of line connection and testing in live work, and solve the problem of inconvenience in connecting and testing multiple lines in live work.

[0037] See Figures 3 to 8 To optimize the cable cavity 104, several push-up columns 19 hinged to the lower insulating housing 12 are provided. These push-up columns 19 are arranged in a row along the axial direction of the cable cavity 104, with their ends facing the cable cavity 104. By hinged to the lower insulating housing 12, the push-up columns 19 can rotate, with their push-up ends facing into the cable cavity 104, aiming to push the cable. The mounting cavity 106 on the lower insulating housing 12 provides mounting positions for components such as the mounting block 21 and the push-up columns 19. The mounting block 21, located below the push-up column 19, is provided in the mounting cavity 106, and has several spring members 22 evenly distributed along the length of the mounting block 21. A connecting part adapted to the spring member 22 is provided on one side of the push-up column 19. The spring member 22 connects to the connecting part, thereby providing a stable and balanced support force to the push-up column 19, making the connection more stable and less prone to deviation. This not only helps the jacking column 19 to operate smoothly during the working process, but also extends the service life of the jacking column 19 and solves the problem that the jacking column 19 may be unstable due to external forces.

[0038] The push post 19 is provided with evenly spaced slots, and the upper insulating housing 11 is provided with abutment portions 107 that are adapted to the slots. When the upper insulating housing 11 and the lower insulating housing 12 are fastened together, the abutment portions 107 can be inserted into the slots. As the upper insulating housing 11 is pressed down, the abutment portions 107 pass through the slots, providing downward pressure to the entire body of the push post 19 and forming an angle with the hinged end, thereby forcing the push post 19 to flip towards the center, pressing the offset cable so that the cable can be accurately positioned in the center of the cable cavity 104. When the upper insulating housing 11 is withdrawn, the spring member 22 uses its own elastic force to push the push post 19 upward, so that the push post 19 returns to its initial position, which can automatically adjust the cable position, improve the positioning accuracy of the cable in the cavity, and solve the problem of cable offset affecting the connection quality.

[0039] The lower conductor 18 has a receiving cavity 108 adapted to the push post 19. When the push post 19 successfully pushes the cable offset from the cable cavity 104 to the center of the cavity, the push post 19 will slide downwards along the circular surface of the cable, thus smoothly sliding into the receiving cavity 108. The upper conductor 17 and the lower conductor 18 can hold the cable in place, and the sliding push post 19 will not obstruct the continued closing of the upper insulating shell 11 and the lower insulating shell 12. The contact end of the push post 19 is arc-shaped, which can conform to the shape of the cable, achieve smoother sliding, further optimize the cable fixing effect, improve the clamping stability of the cable clamp, and solve the safety hazards that may be caused by the cable not being firmly fixed.

[0040] Regarding the arrangement of the magnetic components, the second magnetic component 16 is spirally wound around the inner side of the embedded cavity 103. The spiral arrangement ensures that when the bolt head 101 rotates, the second magnetic component 16 can correspond well with the shape of the spirally embedded first magnetic component 15, avoiding direct contact between the repulsive forces of the first magnetic component 15 and the second magnetic component 16. This makes the repulsive force between the two more moderate, further enhancing the stability during the fastening process, improving the stress relief effect, and solving the problem of fastening instability that may be caused by the instantaneous action of magnetic force.

[0041] Bearings are provided at the top of the upper insulating housing 11 and the bottom of the lower insulating housing 12. The screw portion 102 passes through these bearings. The upper insulating housing 11 and the lower insulating housing 12 are respectively provided with dedicated mounting holes for mounting the bearings. By setting up the bearings, frictional resistance can be reduced during installation, making the assembly between the components smoother. At the same time, the frictional force generated when the stress bolts are tightened is smaller, improving assembly efficiency and solving problems such as jamming and unevenness that may occur during installation.

[0042] Finally, the jacking column 19 is made of insulating material. In actual live-line working scenarios, there may be situations where cables are accidentally damaged or workers accidentally come into contact with them. The use of insulating material in the jacking column 19 can prevent injury to workers due to leakage, improve safety during the operation process, and solve the potential risk of electric shock.

[0043] Working principle: When this live-line working branch lead splicing clamp is in operation, the external mechanical or manual stress bolt is tightened. The screw part 102 drives the bolt head 101, causing the first magnetic element 15 on the first abutment plate 13 to extend into the bolt head 101 and embed into the cavity 103. It forms a repulsive torque with the second magnetic element 16, buffering the tightening force to ensure stable operation and clamping. At the same time, when the upper insulating shell 11 and the lower insulating shell 12 are fastened, the abutment part 107 and the push column 19 are inserted into the slot. The upper insulating shell 11 presses down to make the push column 19 flip and push the offset cable to the middle of the cable cavity 104. Then the push column 19 slides into the lower conductor 18 receiving cavity 108. The upper and lower conductors press the cable to complete the fixation. The whole process realizes the connection and fixation of the branch lead and ensures the smooth progress of live-line work.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An insulated splice clamp with an improved torque structure, characterized in that: Includes the clamp body and fastening components; The clamp body includes an upper insulating shell (11) and a lower insulating shell (12) that engages with it. The fastening assembly includes a stress bolt, a first abutment piece (13) disposed on the upper end face of the upper insulating shell (11), a second abutment piece (109) disposed on the lower end face of the lower insulating shell (12), and a fastening block (14) located below the second abutment piece (109). The stress bolt includes a bolt head (101) and a threaded portion (102). The threaded portion (102) passes through the first abutment plate (13), the upper insulating shell (11), the lower insulating shell (12), and the second abutment plate (109) in sequence along the shell fastening direction and is screwed to the fastening block (14). The first abutment plate (13) is provided with a first magnetic element (15), and the bolt head (101) is provided with an embedded cavity (103), and the embedded cavity (103) is provided with a second magnetic element (16) that is magnetically repelled by the first magnetic element (15). When the stress bolt is tightened downwards, the first magnetic element (15) extends into the embedded cavity (103), causing a repulsive torque to be formed between the first magnetic element (15) and the second magnetic element (16).

2. The insulating splice clamp with an improved torque structure according to claim 1, characterized in that: The upper insulating shell (11) and the lower insulating shell (12) are provided with an upper conductor (17) and a lower conductor (18) that are adapted to each other; the upper conductor (17) and the lower conductor (18) enclose to form a cable cavity (104) and a test wire cavity (105).

3. The insulated splice clamp with an improved torque structure according to claim 2, characterized in that: It also includes a plurality of push posts (19) hinged to the lower insulating housing (12), the push posts (19) being arranged in a row along the axial direction of the cable cavity (104), and the ends of the push posts (19) facing the cable cavity (104).

4. The insulating splice clamp with an improved torque structure according to claim 3, characterized in that: The lower insulating housing (12) is provided with a mounting cavity (106), and a mounting block (21) is also provided in the mounting cavity (106). The mounting block (21) is located below the push column (19), and a number of springs (22) are provided on the mounting block (21).

5. The insulated splice clamp with an improved torque structure according to claim 4, characterized in that: The push column (19) has a connecting part on one side that is adapted to the spring member (22). The spring member (22) is connected to the connecting part so that the spring member (22) provides support to the push column (19).

6. The insulated splice clamp with an improved torque structure according to claim 5, characterized in that: The push column (19) is provided with equally spaced interval slots, and the upper insulating shell (11) is provided with abutting part (107) that matches the interval slots. When the upper insulating shell (11) and the lower insulating shell (12) are fastened together, the abutting part (107) is inserted into the interval slot, so that the contact part of the push column (19) moves toward the lower conductor (18).

7. The insulating splice clamp with an improved torque structure according to claim 3, characterized in that: The lower conductor (18) is provided with a receiving cavity (108) that is adapted to the push post (19). When the push post (19) pushes the cable that is biased against the cable cavity (104) to the center of the cavity, the push post (19) is connected to the receiving cavity (108).

8. The insulated splice clamp with an improved torque structure according to claim 1, characterized in that: The second magnetic element (16) is spirally wound around the inside of the embedded cavity (103).

9. The insulated splice clamp with an improved torque structure according to claim 1, characterized in that: The upper insulating housing (11) is provided with bearings at the top and the lower insulating housing (12) at the bottom, and the screw part (102) passes through the bearings.

10. A branch lead splice clamp for adjusting breaking torque according to claim 3, characterized in that: The jacking column (19) is made of insulating material.

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