Branch box incoming / outgoing cable fixing and clamping device

Abstract

The utility model discloses branch box incoming and outgoing line cable fixed clamping device relates to clamping device technical field, the utility model discloses a box body, sleeve no.

Description

Technical Field

[0001] This utility model relates to the field of clamping device technology, and in particular to a clamping device for fixing and holding the incoming and outgoing cables of a branch box. Background Technology

[0002] A branch box, also known as a cable branch box, is a specialized device in power distribution networks used for branching, transferring, and distributing electrical energy from cable lines. It serves as an intermediate hub connecting main cables and branch cables and is mainly used in 10kV / 0.4kV low-voltage or medium-voltage power distribution systems, such as residential power distribution, industrial park power supply, and municipal road lighting power supply.

[0003] The power of a large-capacity main cable is distributed into 2-8 small-capacity branch cables through internal terminals, which are then transmitted to different power consumption areas. When the line is under maintenance or expanded, there is no need to cut off the main cable. Only the corresponding branch switch in the branch box needs to be turned off to achieve flexible operation of "stopping the main cable and only stopping the branch cable". This reduces the scope of power outages. The internal integrated insulation terminals and grounding devices can isolate the exposed parts of the cable joints, prevent rainwater and dust from entering and causing short circuits, and at the same time prevent personnel from accidentally touching the cable and causing electric shock, thus ensuring the safety of the line.

[0004] Taking a 10kV distribution branch box in a district that requires fixing three incoming and outgoing cables as an example: one incoming cable (cross-linked polyethylene insulation, cross-sectional area 150mm², outer diameter approximately 22mm), and two outgoing cables (cross-sectional areas 95mm² (outer diameter 18mm) and 50mm² (outer diameter 14mm) respectively). The branch box (600mm long × 400mm wide × 500mm high) has a compact internal space. Because it is located next to a green belt in a residential area, it is susceptible to cable tension caused by construction collisions and soil settlement. Traditional fixing methods using ordinary clamps suffer from poor compatibility, requiring replacement with clamps of different specifications; external pulling easily leads to loosening of the cable-to-branch box terminal joints; insufficient fixing force; the need to tighten multiple bolts individually; and cumbersome installation. Therefore, those skilled in the art have provided a cable fixing clamping device for branch boxes to solve the problems mentioned in the background. Utility Model Content

[0005] 1. Technical Solution

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model is a cable fixing and clamping device for branch box inlet and outlet, including a box body, a first clamp, a second clamp, a rotating shaft, and a positioning rod. The box body has multiple symmetrically distributed bearing seats. A rotating shaft is rotatably mounted inside each bearing seat. A worm gear is sleeved on the outer wall of the rotating shaft. A pull rope is wound around the outer wall of the rotating shaft. A worm is meshed at the upper end of the worm gear. Mounting shafts are rotatably mounted inside the box body at both ends of the worm. A handle is provided at the front end of the mounting shaft. A spring is provided on the inner wall of the box body. A support ring is provided at one end of the spring. A limiting block is provided at one end of the support ring, which is engaged with a tooth groove on the outer wall of the worm gear. A first clamp is provided at one end of the pull rope. A second clamp is provided on one side of the first clamp. A symmetrically distributed bracket is provided at one end of the first clamp. A support shaft is rotatably mounted inside the bracket. A second bracket, connected to the first clamp, is sleeved on the outer wall of the support shaft. A torsion spring, connected to both brackets one and two respectively, is sleeved on the outer side of the support shaft.

[0008] Furthermore, the second sleeve has a travel groove and an adjustment groove that are interconnected and arranged in a cross shape inside one end, and a card band that is slidably inserted into the travel groove at one end of the second sleeve. The card band has card slots that are evenly distributed inside.

[0009] Specifically, the cassette slides inside the travel groove, and after the first and second cassettes close to clamp the outer wall of the cable, the connection is reinforced by the cassette.

[0010] Furthermore, a second support ring is provided inside the adjustment groove, and a rod is slidably inserted inside the second support ring. A locking block is provided at the lower end of the rod and locked inside the locking groove. A bottom ring is sleeved on the outer wall of the rod. A second spring is sleeved on the outside of the rod between the bottom ring and the second support ring. A second handle is provided at the upper end of the rod.

[0011] Specifically, the second support ring and the bottom ring support the second spring. The elastic force of the second spring is applied to the insertion rod through the bottom ring. The handle makes it easy to apply a pulling force to the insertion rod. After the locking block is inserted into the corresponding slot, the first and second locking sleeves are locked and fixed to the outer wall of the cable.

[0012] Furthermore, the upper end of the housing has equally spaced stroke holes, the pull rope is slidably installed inside the stroke holes, and the outer wall of the housing is fitted with flanges arranged in a rectangular pattern.

[0013] Specifically, the pull rope slides inside and outside the box through the stroke hole, and the flange is used for the installation of parts, fixing the box in the branch box, so that the pull rope has a fixed foundation for traction.

[0014] Furthermore, each of the rotating shafts is fitted with a limiting wheel located on both sides of the pull rope, and one end of the limiting block is provided with an arc-shaped guide angle. Both the first and second sleeves are provided with a semi-circular inner lining pad.

[0015] Specifically, the limit wheel limits both ends of the pull rope to prevent it from scattering during winding and to keep the rope taut during winding. At the same time, the guide angle allows the worm gear to rotate forward. The arc surface of the guide angle effectively squeezes the limit block, causing the limit block to contract. The worm gear rotating in the opposite direction will be blocked by the plane at one end of the limit block and cannot pass through, thus stabilizing the shaft and keeping the tightened pull rope stable.

[0016] Furthermore, a positioning rod is slidably installed inside the front end of the box, with one end connected to a support ring, and a handle is provided at one end of the positioning rod on the outside of the box.

[0017] Specifically, the positioning rod slides inside the spring and limits the extension of the spring to prevent it from shifting outward. The grip handle facilitates the application of pulling force to the positioning rod. By gripping the handle, the limit block can be actively displaced, providing conditions for active adjustment when the worm gear needs to rotate in the opposite direction.

[0018] 2. Beneficial effects

[0019] Compared with existing technologies, the advantages of this utility model are:

[0020] In this invention, the housing is fixedly installed inside the branch box. Then, the unwinding pull rope connects the first and second clamps to the outer wall of the cable. The unwound cable is automatically closed by a torsion spring and inserted into the slot inside the clamping tape by a clamping block, which can be used to securely clamp cables of different radii. Then, the pull rope is collected, and one end of the cable is kept in a taut state by the pull rope. When the cable is subjected to external force, the force is prevented from being directly transmitted to the connection end of the cable and the main cable. The pull rope is used for traction, and the external force acts on the pull rope. The pull rope is fixed by the housing, which maintains the foundation of traction stability and keeps the cable stable during use. It also prevents the connection end of the cable and the main cable from loosening when external force is applied.

[0021] Meanwhile, the convenient clamping of cables in different locations on branch lines with limited space is facilitated by the clamping sleeves one and two of the cable clamping structure. When the worm gear drives the shaft to rotate, the cable is wound up, and the limit block is engaged in the tooth groove of the worm gear to prevent the worm gear from rotating in the opposite direction, thus locking the shaft and ensuring stable cable clamping.

[0022] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0025] Figure 2 This is a top-view three-dimensional structural diagram of the present invention;

[0026] Figure 3 This is a side view of the three-dimensional structure of the bearing housing of this utility model;

[0027] Figure 4 This is a side view of the three-dimensional structure of the pull rope of this utility model;

[0028] Figure 5 This is a side view perspective diagram of the card sleeve 1 and card sleeve 2 of this utility model;

[0029] Figure 6 This is a three-dimensional cross-sectional view of one side of the card sleeve of this utility model;

[0030] Figure 7 This is a side view of the three-dimensional structure of the limiting block of this utility model;

[0031] Figure 8 This is a top-section three-dimensional structural diagram of the adjustment groove of this utility model.

[0032] The attached diagram lists the components represented by each number as follows:

[0033] 1. Housing; 2. Bearing seat; 3. Flange; 4. Sleeve 1; 5. Sleeve 2; 6. Inner liner; 7. Pull rope; 8. Worm gear; 9. Worm; 10. Limit wheel; 11. Mounting shaft; 12. Handle; 13. Rotating shaft; 14. Spring 1; 15. Clamping belt; 16. Slot; 17. Bracket 1; 18. Bracket 2; 19. Support shaft; 20. Torsion spring; 21. Handle 1; 22. Positioning rod; 23. Support ring 1; 24. Limit block; 25. Guide angle; 26. Handle 2; 27. Insert rod; 28. Support ring 2; 29. ​​Spring 2; 30. Bottom ring; 31. Clamping block; 32. Stroke groove; 33. Adjustment groove; 34. Stroke hole. Detailed Implementation

[0034] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0037] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0038] Example 1

[0039] Please see Figure 1-7 As shown, this embodiment is a cable fixing and clamping device for branch box inlet and outlet lines, including a box body 1, a first clamp 4, a second clamp 5, a rotating shaft 13, and a positioning rod 22. Multiple sets of symmetrically distributed bearing seats 2 are arranged inside the box body 1. The rotating shaft 13 is rotatably mounted inside the bearing seats 2. A worm gear 8 is sleeved on the outer wall of the rotating shaft 13, and a pull rope 7 is wound around the outer wall of the rotating shaft 13. A worm 9 is meshed at the upper end of the worm gear 8. Mounting shafts 11 are rotatably mounted inside the box body 1 at both ends of the worm 9. A handle 12 is provided at the front end of the mounting shaft 11. A spring is provided on the inner wall of the box body 1. One end of spring 14 is provided with a support ring 23, and one end of support ring 23 is provided with a limiting block 24 that is engaged in the tooth groove of the outer wall of worm gear 8. One end of pull rope 7 is provided with a sleeve 14, and one side of sleeve 14 is provided with a sleeve 25. One end of sleeve 14 is provided with symmetrically distributed brackets 17. A support shaft 19 is rotatably installed inside the bracket 17. A bracket 28 connected to the sleeve 14 is sleeved on the outer wall of the support shaft 19. A torsion spring 20 connected to the bracket 17 and the bracket 28 is sleeved on the outer side of the support shaft 19.

[0040] The second sleeve 5 has a stroke groove 32 and an adjustment groove 33 that are interconnected and arranged in a cross shape inside one end. The second sleeve 5 has a card belt 15 that is slidably inserted into the stroke groove 32. The card belt 15 has card slots 16 that are evenly distributed inside.

[0041] The adjustment groove 33 is provided with a support ring 28, and a rod 27 is slidably inserted into the support ring 28. The lower end of the rod 27 is provided with a locking block 31 that is locked into the slot 16. A bottom ring 30 is sleeved on the outer wall of the rod 27. A spring 29 is sleeved on the outside of the rod 27 between the bottom ring 30 and the support ring 28. A handle 26 is provided on the upper end of the rod 27.

[0042] The upper end of the housing 1 has equidistantly distributed stroke holes 34, and the pull rope 7 is slidably installed inside the stroke holes 34. The outer wall of the housing 1 is fitted with flanges 3 arranged in a rectangular pattern.

[0043] The outer wall of the rotating shaft 13 is fitted with limiting wheels 10 located on both sides of the pull rope 7. One end of the limiting block 24 is provided with an arc-shaped guide angle 25. The inside of the first ferrule 4 and the second ferrule 5 is provided with a semi-circular inner lining pad 6.

[0044] A positioning rod 22, one end of which is connected to a support ring 23, is slidably installed inside the front end of the housing 1. A handle 21 is provided at one end of the positioning rod 22 located on the outside of the housing 1.

[0045] Based on the implementation steps of Embodiment 1: According to the position of the cable inlet and outlet ports inside the branch box, the box body 1 is bolted to the inner wall of the branch box through the outer rectangular flange 3 and fixed with M8 stainless steel bolts. The level of the box body 1 is calibrated with a level to ensure that the box body 1 is not tilted. The flange 3 structure provides a stable installation base. Pull one end of each set of pull ropes 7 so that the pull ropes 7 extend along the stroke hole 34 at the upper end of the box body 1. The pre-release length is about to match the cable laying path inside the branch box. At the same time, the pull ropes 7 are limited by the limit wheels 10 on both sides of the rotating shaft 13 to prevent the pull ropes 7 from scattering when they are wound up.

[0046] Grasp the first ferrule 4 and the second ferrule 5 with both hands and apply force to both sides. The first ferrule 4 is connected to the second ferrule 5's bracket 18 through the first bracket 17 and the support shaft 19. When force is applied, the support shaft 19 rotates, and the torsion spring 20 is stretched and stored. Place the first ferrule 4 and the second ferrule 5 on the lower part of the cable, 150mm away from the branch box terminal connector, to avoid affecting the connector wiring. Release the handle, and the torsional force of the torsion spring 20 will cause the ferrule to close automatically. At this time, the semi-circular inner liner 6 inside the ferrule is tightly attached to the outer wall of the cable, and the cable is initially fixed by the rubber friction.

[0047] Pull the handle 26 of the insertion rod 27 upwards. The insertion rod 27 slides along the support ring 28. The bottom ring 30 compresses the spring 29, causing the lower end of the locking block 31 to rise. This pushes the locking tape 15 at one end of the sleeve 5, causing the locking tape 15 to slide along the travel groove 32 and align with the slot 16 on the surface of the locking tape 15. Release the handle 26. The elastic force of the spring 29 pushes the bottom ring 30 and the insertion rod 27 downwards, causing the locking block 31 to engage with the corresponding slot 16, thus locking the sleeve 4 and the sleeve 5. The automatic closing of the torsion spring 20 and the locking of the slot 16 of the locking tape 15 make it compatible with cables of different outer diameters, solving the problem of traditional clamps requiring specification changes and poor compatibility. At the same time, the inner liner 6 prevents the metal sleeve from directly contacting the cable insulation layer, preventing wear of the insulation layer.

[0048] Turn the handle 12 at the front end of the worm 9 clockwise. The worm 9 rotates through the mounting shaft 11, driving the meshing worm wheel 8 to rotate. The rotating shaft 13, coaxial with the worm wheel 8, rotates synchronously, winding up the pull rope 7. Observe the cable condition during winding until the cable is in a slightly taut state. The tension is judged by hand to avoid excessive pulling that could deform the joint. During this process, when the worm wheel 8 rotates, its tooth grooves press against the arc guide angle 25 of the limiting block 24. The limiting block 24 slides along the support ring 23, compressing the spring 14, allowing the worm wheel 8 to rotate clockwise. When the handle 12 is stopped, the spring... The elastic force of 14 pushes the support ring 23 and the limit block 24 to reset. The flat surface of one end of the limit block 24 is engaged in the tooth groove of the worm gear 8, preventing the worm gear 8 from reversing, thereby locking the rotating shaft 13 and the pull rope 7, so that the cable maintains a stable traction state. The worm gear 8 and worm 9 reduce speed and the limit block 24 prevents reversal. If the length of the pull rope 7 needs to be adjusted later, the handle 21 of the positioning rod 22 can be pulled outward. The positioning rod 22 drives the support ring 23 and the limit block 24 to disengage from the tooth groove of the worm gear 8, and the handle 12 can be rotated counterclockwise to unwind the pull rope 7. The operation is convenient and meets the needs of cable maintenance in the branch box.

[0049] Following the steps above, the clamping and fixing of 150mm² and 50mm² cross-sectional area cables with pull rope 7 are completed sequentially. Multiple sets of cables are fixed in an orderly manner by this device, with a spacing of 150mm, without messy tangling, which is suitable for the compact space inside the branch box. The pull rope 7 is prevented from loosening, and the limiting block 24 is always locked into the tooth groove of the worm gear 8 to prevent displacement of the cable and the terminal joint of the branch box and the ferrule from falling off. This solves the problem of loosening of the joint caused by external force in the traditional fixing method. All three sets of cables of different specifications are clamped by the same type of ferrule 1 4 and ferrule 2 5. Only the position of the slot 16 of the clamping tape 15 is adjusted to achieve a firm clamping. No parts need to be replaced, and the adaptation efficiency is improved.

[0050] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0051] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cable fixing and clamping device for branch box inlet and outlet lines, characterized in that: Includes a housing (1), a first ferrule (4), a second ferrule (5), a rotating shaft (13), and a positioning rod (22). The housing (1) contains multiple symmetrically distributed bearing seats (2). A rotating shaft (13) is rotatably mounted inside each bearing seat (2). A worm gear (8) is sleeved on the outer wall of the rotating shaft (13). A pull rope (7) is wound around the outer wall of the rotating shaft (13). A worm (9) meshes with the upper end of the worm gear (8). Mounting shafts (11) are rotatably mounted inside the housing (1) at both ends of the worm (9). A handle (12) is located at the front end of the mounting shaft (11). A spring (14) is installed on the inner wall of the housing (1). (14) One end is provided with a support ring (23), and one end of the support ring (23) is provided with a limiting block (24) that is engaged in the tooth groove of the outer wall of the worm gear (8). One end of the pull rope (7) is provided with a sleeve (4), and one side of the sleeve (4) is provided with a sleeve (5). One end of the sleeve (4) is provided with a symmetrically distributed bracket (17). The support shaft (19) is rotatably installed inside the support shaft (17). One end of the support shaft (19) is sleeved with a bracket (18) that is connected to the sleeve (4). The outside of the support shaft (19) is sleeved with a torsion spring (20) that is connected to the bracket (17) and the bracket (18) respectively.

2. The branch box inlet and outlet cable fixing clamping device according to claim 1, characterized in that: The second sleeve (5) has a travel groove (32) and an adjustment groove (33) that are interconnected and arranged in a cross shape inside one end. The second sleeve (5) has a card band (15) that is slidably inserted into the travel groove (32) inside one end. The card band (15) has card slots (16) that are evenly distributed inside.

3. The branch box inlet and outlet cable fixing clamping device according to claim 2, characterized in that: The adjustment groove (33) is provided with a support ring two (28), and a rod (27) is slidably inserted into the support ring two (28). The lower end of the rod (27) is provided with a locking block (31) that is locked into the locking groove (16). The outer wall of the rod (27) is fitted with a bottom ring (30). A spring two (29) is provided between the bottom ring (30) and the support ring two (28) and fitted onto the outside of the rod (27). The upper end of the rod (27) is provided with a handle two (26).

4. The branch box inlet and outlet cable fixing clamping device according to claim 1, characterized in that: The upper end of the housing (1) is provided with equally spaced stroke holes (34), the pull rope (7) is slidably installed inside the stroke holes (34), and the outer wall of the housing (1) is fitted with flanges (3) arranged in a rectangular pattern.

5. The branch box inlet and outlet cable fixing clamping device according to claim 1, characterized in that: The outer wall of the rotating shaft (13) is fitted with limiting wheels (10) located on both sides of the pull rope (7). One end of the limiting block (24) is provided with an arc-shaped guide angle (25). The inner walls of the first sleeve (4) and the second sleeve (5) are both provided with a semi-circular inner lining pad (6).

6. The branch box inlet and outlet cable fixing clamping device according to claim 1, characterized in that: A positioning rod (22) is slidably installed inside the front end of the box (1) and one end is connected to the support ring (23). A handle (21) is provided at one end of the positioning rod (22) on the outside of the box (1).

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