Novel buried anti-settling circuit branch box

Abstract

The application discloses a novel buried anti-settling circuit branch box, which comprises a cable branch box body, a branch terminal, a joint, a cable, an energy storage assembly and a stress release device, and a force bearing sleeve is arranged on the cable end. The energy storage assembly drives a conversion block to move by using a thermal deformation spring, drives a driven part to rotate by a guide inclined groove and an eccentric pin shaft, and stores energy in a coil spring; when the conversion block reaches a preset position, a first rotation limiting block and a second rotation limiting block are disengaged, so that the coil spring drives a central shaft to output power. The central shaft drives a plurality of rolling units to reciprocate along the force bearing sleeve in the axial direction through a transmission connecting rod, a straight gear in the rolling unit moves along a rack, and a helical gear drives a peripheral gear ring to rotate, so that adjacent rolling units rotate in the opposite direction. A plurality of pressing heads form a rolling contact area which migrates in the axial direction and the circumferential direction on the surface of the force bearing sleeve, so as to adjust the bending of the cable end and the local stress concentration caused by the settlement or deviation of the box body.

Description

Technical Field

[0001] This invention relates to the field of cable branch box technology, specifically a novel underground anti-settlement circuit branch box. Background Technology

[0002] Buried cable distribution boxes are typically installed underground or semi-underground to provide electrical connections between main cables and branch cables. A branch terminal is usually installed inside the box; external cables pass through the box and connect to the branch terminal via connectors. To ensure waterproofing, moisture protection, and wiring stability, the cable ends are usually secured to the box using clamps, seals, or support sleeves.

[0003] During long-term use, the backfill soil around the cable distribution box may be affected by factors such as changes in groundwater, vehicle loads, frost heave, or foundation settlement, causing the box to settle, shift laterally, or deflect at an angle relative to the cable protection pipe. Because the cable ends are restricted by the joints and the cable entry points within the box, the relative displacement between the box and the cable can easily cause the cable to bend near the joint, resulting in continuous bending stress, axial tension, and localized compressive stress at a fixed location.

[0004] Existing cable distribution boxes mainly reduce cable stress by increasing cable clamping strength, installing elastic seals, or allowing for additional cable length. However, increasing clamping strength can cause the cable sheath to be subjected to concentrated pressure for a long time; simply installing elastic seals can only passively absorb displacement within a certain range and is difficult to adjust for existing bending; allowing for additional cable length will increase the space occupied inside the box and make it difficult to control the bending position and direction of the cable.

[0005] Therefore, there is a need to provide a new type of underground anti-settlement circuit branch box, which can change the rolling contact position of the cable end in the axial and circumferential directions, thereby adjusting the bending of the cable end and the local stress concentration caused by the settlement or displacement of the box. Summary of the Invention

[0006] The purpose of this invention is to provide a novel underground anti-settlement circuit branch box to solve the problem that the cable ends in existing underground cable branch boxes are prone to forming fixed bending points and local stress concentration after the box settles or shifts.

[0007] To achieve the above objectives, the present invention provides a novel underground anti-settlement circuit branch box, comprising a cable branch box body, wherein a branch terminal is provided inside the cable branch box body, and connectors are fixedly installed on the outer walls at both ends of the branch terminal body. Cables are connected to the ends of the connectors, and load-bearing sleeves are fitted on the outer sides of the ends of the cables.

[0008] The cable branch box is equipped with an energy storage component. This component converts and stores the heat energy generated by the cable operation into mechanical energy, and outputs driving force when the stored energy reaches a set condition. The buried cable branch box also includes a stress relief device. This device comprises at least one rolling unit sleeved on the outside of the load-bearing sleeve and a transmission component connected to the rolling unit. The rolling unit has a rolling portion that rolls in contact with the load-bearing sleeve.

[0009] The transmission assembly is connected to the energy storage assembly and the rolling unit respectively, and is used to convert the driving force output by the energy storage assembly into the reciprocating motion of the rolling unit along the axial direction of the bearing sleeve and the rotational motion around the axis of the bearing sleeve, so that the rolling contact area between the rolling part and the bearing sleeve moves along the axial and circumferential directions of the bearing sleeve.

[0010] Preferably, there are multiple rolling units, which are spaced apart along the cable axis; when two adjacent rolling units reciprocate synchronously along the cable axis, they rotate in opposite directions around the cable axis.

[0011] Preferably, the rolling unit includes a mounting ring frame sleeved on the outside of the cable, and a rotating toothed ring is rotatably mounted on the mounting ring frame via an annular guide structure. The rotating toothed ring can rotate relative to the mounting ring frame around the cable axis, and multiple pressing heads are spaced circumferentially on the inner wall of the rotating toothed ring. The multiple pressing heads extend toward the load-bearing sleeve and together form the rolling part.

[0012] Preferably, the transmission assembly includes a guide frame on which a rack is fixedly mounted. The rolling unit also includes a drive component, which includes a first helical gear and a first spur gear arranged coaxially. The first helical gear meshes with a rotary gear ring, and the first spur gear meshes with the rack.

[0013] Preferably, a pusher is slidably mounted on the guide frame, and the pusher is fixedly connected to multiple rolling units. One end of the pusher is provided with a receiving groove. The guide frame is also provided with a rotatable transmission link, one end of which is provided with a protruding pin, which is disposed in the receiving groove.

[0014] Preferably, the energy storage component includes a slide rail and a conversion block slidably connected to the slide rail. A heat-deformation spring abuts on one side of the conversion block, and a return spring abuts on the other side. A guide groove is formed on the conversion block. The energy storage component also includes a driven member with an eccentric pin slidably disposed within the guide groove. When the conversion block slides along the slide rail, the driven member rotates about its own axis.

[0015] Preferably, the energy storage component further includes a coil spring that is driven by the driven member. The coil spring is fitted around the outer periphery of the central shaft. The first end of the coil spring is connected to the driven member, and the second end is connected to the central shaft. The central shaft is driven by the transmission link.

[0016] Preferably, the energy storage component further includes a first limiting block and a second limiting block. The first limiting block has an insertion protrusion, and the second limiting block has an insertion groove corresponding to the insertion protrusion. The second limiting block is fixedly connected to the central shaft. The conversion block has a spur tooth on its side. The energy storage component also includes a reciprocating screw, one end of which has a control gear that meshes with the spur tooth. The first limiting block is threadedly connected to the reciprocating screw. The reciprocating screw is used to drive the first limiting block away from the second limiting block when the conversion block moves to a preset position, causing the insertion protrusion to exit the insertion groove and releasing the rotation restriction on the central shaft.

[0017] The beneficial effects of this invention are as follows: Energy storage components can convert and store the heat generated by the cable operation into mechanical energy, so that the heat that would otherwise be lost to the surrounding environment during the operation of the cable can be used to drive the stress relief device, which helps to reduce the dependence of the stress relief device on external driving energy.

[0018] The transmission component converts the driving force output by the energy storage component into the reciprocating motion of the rolling unit along the axial direction of the bearing sleeve and the rotational motion around the axis of the bearing sleeve, so that the same rolling unit can simultaneously form rolling displacement in both axial and circumferential directions.

[0019] The rolling contact area between the rolling part and the bearing sleeve can move along the axial and circumferential directions of the bearing sleeve, so that the rolling force is no longer continuously applied to a single axial or circumferential position of the bearing sleeve, which is beneficial to expand the rolling range and disperse the local force at the fixed position.

[0020] Since the rolling contact area can change position simultaneously along the axial and circumferential directions, the stress relief device can roll and adjust the cable end from different circumferential and axial positions, thereby adapting the cable to the bending state formed by the settlement or displacement of the box in different directions. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural cross-sectional view of an embodiment of the present invention; Figure 2 This is a schematic diagram of the stress relief device in one embodiment of the present invention; Figure 3 This is a schematic diagram of the transmission assembly and rolling unit in one embodiment of the present invention; Figure 4This is a cross-sectional view of an energy storage component according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the conversion block in one embodiment of the present invention.

[0023] Explanation of reference numerals in the attached figures: 1. Cable branch box; 2. Branch terminal; 3. Connector; 4. Cable; 5. Energy storage component; 6. Stress relief device; 7. Rolling unit; 8. Transmission component; 11. Mounting ring frame; 13. Rotating gear ring; 14. Top pressure head; 15. Guide frame; 16. Rack; 17. Drive component; 171. First helical gear; 172. First spur gear; 18. Pushing component; 181. Receiving groove; 19. Transmission connecting rod; 191. Protruding pin; 21. Conversion block; 22. Heat deformation spring; 23. Return spring; 24. Guide groove; 25. Driven component; 251. Eccentric pin; 26. Coil spring; 27. Central shaft; 28. First limit block; 29. ​​Second limit block; 30. Spur gear section; 31. Control gear. Detailed Implementation

[0024] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product.

[0025] It will be understood by those skilled in the art that certain well-known structures and their descriptions may be omitted in the accompanying drawings. The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] As attached Figure 1-5 The novel buried anti-settlement circuit branch box shown includes a cable branch box 1, which is used for installation in underground or semi-underground spaces. The cable branch box 1 can be a metal box, a fiber-reinforced composite material box, or a combination of an external pressure-bearing shell and an internal sealed chamber.

[0027] The cable branch box 1 has a branch terminal 2 inside. Connectors 3 are installed on the outer walls of both ends of the branch terminal 2, and cables 4 are connected to the ends of the connectors 3. Cables 4 can be main cables or branch cables. A load-bearing sleeve 9 is fitted onto the outer side of the end of the cable 4 near the connector 3.

[0028] The load-bearing sleeve 9 is used to receive the rolling pressure applied by the stress relief device 6 and diffuse the rolling pressure to the outer sheath of the cable 4. The load-bearing sleeve 9 preferably adopts a radially split structure, formed by the splicing of two semi-circular sleeves or multiple arc-shaped sleeves, so that it can be installed radially from the cable 4 after the connector 3 is connected. An elastic pressure-equalizing layer can be provided on the inner side of the load-bearing sleeve 9, and an insulating and wear-resistant layer can be provided on the outer side. The split splicing position adopts an arc transition or a diagonal overlap structure.

[0029] like Figures 2 to 4 As shown, the stress relief device 6 includes multiple rolling units 7 spaced apart along the axial direction of the cable 4. In this embodiment, two rolling units 7 are preferably provided, which are respectively sleeved on the outside of the load-bearing sleeve 9 and can move synchronously back and forth along the axial direction of the cable 4.

[0030] Each rolling unit 7 includes a mounting ring frame 11. The inner side of the mounting ring frame 11 supports the rotating toothed ring 13 via an annular guide structure. The annular guide structure can be an annular groove and slider, a ball slewing bearing, or a thin-walled bearing, allowing the rotating toothed ring 13 to rotate relative to the mounting ring frame 11 about the axis of the cable 4.

[0031] The outer periphery or side of the rotating gear ring 13 is provided with helical teeth that mesh with the first helical gear 171, and the inner wall of the rotating gear ring 13 is provided with a plurality of pressing heads 14 at equal angular intervals along the circumferential direction. In this embodiment, each rotating gear ring 13 is provided with four pressing heads 14; in other embodiments, three, five or more pressing heads 14 may also be provided.

[0032] The pressing head 14 extends radially along the rotating toothed ring 13. A roller is preferably rotatably mounted on the inner end of the pressing head 14, and the outer circumferential surface of the roller makes rolling contact with the outer circumferential surface of the bearing sleeve 9. A radial elastic element may be provided between the pressing head 14 and the rotating toothed ring 13, allowing multiple rollers to press against the bearing sleeve 9 with limited pressure; simultaneously, a radial hard limit is provided to prevent the rollers from excessively pressing against the bearing sleeve 9 when the mechanism jams or is subjected to impact.

[0033] The roller may include an insulating core and an elastic wear-resistant coating layer disposed on the outside of the insulating core. The outer contour of the roller is preferably slightly bulging to accommodate the surface error of the load-bearing sleeve 9 and reduce edge indentations.

[0034] The transmission assembly 8 includes a guide frame 15 fixedly installed inside the cable branch box 1. The guide frame 15 extends axially along the cable 4 and has a rack 16 at the position corresponding to the rolling unit 7. The guide frame 15 is also provided with an axial groove, along which the pusher 18 can reciprocate.

[0035] Multiple mounting rings 11 are fixedly connected to the pusher 18, so that when the pusher 18 moves, it drives multiple rolling units 7 to move synchronously along the axial direction of the bearing sleeve 9. One end of the pusher 18 is provided with a receiving groove 181 extending along its width direction or perpendicular to the moving direction.

[0036] A transmission link 19 is rotatably mounted on the guide frame 15, and the transmission link 19 is connected to the central shaft 27. A protruding pin 191 is provided at one end of the transmission link 19 that is off-axis of rotation, and the protruding pin 191 extends into the receiving groove 181. When the central shaft 27 drives the transmission link 19 to rotate, the protruding pin 191 slides within the receiving groove 181, pushing the pusher 18 to reciprocate along the guide frame 15, thus forming a crank-slider type motion conversion structure.

[0037] Each rolling unit 7 also includes a drive member 17 rotatably mounted on the mounting ring frame 11. The drive member 17 includes a first helical gear 171 and a first spur gear 172 coaxially fixed. The first helical gear 171 meshes with the helical teeth of the rotating gear ring 13, and the first spur gear 172 meshes with a rack 16 fixed on the guide frame 15.

[0038] When the pusher 18 drives the mounting ring 11 to move axially along the cable 4, the first spur gear 172 rolls along the fixed rack 16 and drives the drive member 17 to rotate; the first helical gear 171 rotates synchronously with the drive member 17, thereby driving the circumferential gear ring 13 to rotate around the axis of the cable 4. Therefore, the rolling unit 7 only needs to receive the axial driving force provided by the pusher 18 to simultaneously obtain axial movement and circumferential rotation.

[0039] To ensure that two adjacent rolling units 7 rotate in opposite directions, the driving components 17 of adjacent rolling units 7 are arranged in a mirror image. For example, racks 16 can be provided on opposite sides of the load-bearing sleeve 9 on the guide frame 15, and the meshing positions of two adjacent first helical gears 171 and the rotating gear rings 13 are opposite. Thus, when multiple mounting ring frames 11 move along the same axial direction, adjacent rotating gear rings 13 rotate in opposite directions.

[0040] When the two rotating toothed rings 13 rotate in opposite directions, the tangential reaction torques of their rollers acting on the bearing sleeve 9 cancel each other out or decrease. At the same time, the rollers reciprocate axially with the mounting ring frame 11 and rotate around the bearing sleeve 9 with the rotating toothed rings 13, so that the rolling contact area forms a circumferential and axial composite movement trajectory on the outer circumferential surface of the bearing sleeve 9.

[0041] The energy storage component 5 includes a slide rail fixedly installed inside the cable branch box 1, and a conversion block 21 slidably installed on the slide rail. A thermal deformation spring 22 abuts against the first side of the conversion block 21, and a return spring 23 abuts against the second side. The thermal deformation spring 22 may be a helical spring made of shape memory alloy, and is thermally coupled to the heat-generating part of the connector 3 or cable 4 via a heat-conducting element 36.

[0042] The heat-conducting component 36 is preferably made of a material with thermal conductivity and electrical insulation properties, or an insulating isolation section is provided in the metal heat conduction path, so that the operating heat of the cable 4 can be transferred to the thermal deformation spring 22, while avoiding the formation of a conductive path between the energy storage component 5 and the charged conductor. The thermal deformation spring 22 and the energy storage component 5 can be housed in a sealed cavity isolated from the branch terminal 2.

[0043] The conversion block 21 is provided with a guide groove 24, which is inclined relative to the moving direction of the conversion block 21. The driven member 25 is rotatably mounted on one side of the slide rail or on the bracket of the energy storage component 5 about its own axis. The driven member 25 is provided with an eccentric pin 251, which extends into the guide groove 24 and can slide along the guide groove 24.

[0044] When the operating temperature of cable 4 rises, the thermal deformation spring 22 reaches the phase transition temperature and generates a shape-restoring force, which pushes the conversion block 21 to move along the slide rail against the action of the reset spring 23. The groove wall of the guide sloping groove 24 pushes the driven member 25 to rotate around its own axis through the eccentric pin 251, thereby converting the linear movement of the conversion block 21 into the rotational motion of the driven member 25.

[0045] When the temperature of cable 4 decreases, the restoring force of thermal deformation spring 22 decreases, and return spring 23 pushes conversion block 21 back in the opposite direction. A one-way transmission structure is provided between driven member 25 and coil spring 26 so that when conversion block 21 returns, it does not release the energy already input to coil spring 26 in the reverse direction.

[0046] A coil spring 26 is fitted around the outer periphery of the central shaft 27. The first end of the coil spring 26 is connected to the driven member 25, and the second end is connected to the central shaft 27. During the energy storage phase, the driven member 25 rotates under the drive of the conversion block 21, while the central shaft 27 is kept stationary by the rotation limiting structure, so that a relative rotation angle is generated between the driven member 25 and the central shaft 27, and the coil spring 26 is tightened.

[0047] The second rotation limit block 29 is fixedly mounted on the central shaft 27 and has an insertion slot. The first rotation limit block 28 is disposed on one side of the second rotation limit block 29 and has an insertion protrusion that can be inserted into the insertion slot. In the initial state of energy storage, the insertion protrusion is located in the insertion slot, and the first rotation limit block 28 is restricted from rotation by the guide frame 15 or the frame of the energy storage component 5, thereby restricting the rotation of the central shaft 27 through the second rotation limit block 29.

[0048] The conversion block 21 has a spur tooth section 30 on its side, and the reciprocating screw 31 is rotatably mounted on the frame of the energy storage component 5. One end of the reciprocating screw 31 is fixedly or drivenly connected to a control gear 31, which meshes with the spur tooth section 30. The first rotation limit block 28 is threadedly connected to the reciprocating screw 31 and restricts rotation through an axial guide structure, so that the first rotation limit block 28 can move along the axial direction of the reciprocating screw 31 when it rotates.

[0049] When the conversion block 21 is in the energy storage stroke, the spur gear 30 drives the control gear 31 and the reciprocating screw 31 to rotate. The reciprocating screw 31 gradually drives the first limit block 28 away from the second limit block 29. The transmission ratio of the spur gear 30 and the control gear 31, the pitch of the reciprocating screw 31, the inclination of the guide groove 24, and the torsional stiffness of the coil spring 26 are matched with each other so that when the conversion block 21 moves to the preset position, the coil spring 26 reaches the predetermined energy storage and at the same time the insertion protrusion exits the insertion groove.

[0050] After the insertion protrusion exits the insertion slot, the second rotation limit block 29 and the central shaft 27 are released from rotational restriction. The coil spring 26 releases its elastic potential energy, driving the central shaft 27 to rotate. The central shaft 27 drives the transmission link 19 to rotate, and the transmission link 19 drives the pusher 18 to complete the set axial stroke through the protruding pin 191 and the receiving groove 181.

[0051] As the conversion block 21 continues to reciprocate, the reciprocating screw 31 drives the first limit block 28 to approach the second limit block 29 again. Under the action of the corner limiter 35, the central shaft 27 stops at the position corresponding to the insertion slot and the insertion protrusion, causing the insertion protrusion to re-enter the insertion slot and lock the central shaft 27. The energy storage assembly 5 is thus restored to the initial state of the next energy storage operation.

[0052] To reduce the impact generated when the coil spring 26 is released, a rotational damper, a friction torque limiter, or an elastic buffer can be installed between the central shaft 27 and the transmission connecting rod 19. When the pusher 18 or the rolling unit 7 jams, the friction torque limiter slips to limit the maximum force transmitted to the roller and the bearing sleeve 9.

[0053] The complete working process of this embodiment is as follows: In the initial state, the insertion protrusion of the first limiting block 28 is located in the insertion groove of the second limiting block 29, and the central shaft 27 is restricted from rotating; the conversion block 21 is located at the first end of the slide rail, and the reset spring 23 and the thermal deformation spring 22 are in a pre-installed state; multiple rollers abut against the load-bearing sleeve 9 with limited pressure.

[0054] When the load on cable 4 increases and temperature fluctuations occur, heat is transferred to the thermal deformation spring 22 via the heat-conducting component 36. The thermal deformation spring 22 returns to its original shape and pushes the conversion block 21 to reciprocate along the slide rail. On one hand, the conversion block 21 drives the driven component 25 to rotate through the guide groove 24 and the eccentric pin 251, causing the coil spring 26 to gradually coil up; on the other hand, it drives the first limit block 28 to gradually retract from the second limit block 29 through the spur tooth 30, the control gear 31 and the reciprocating screw 31.

[0055] When the conversion block 21 reaches the preset position, the coil spring 26 reaches the set energy storage condition, the insertion protrusion exits the insertion slot, and the central shaft 27 is released from locking. The coil spring 26 drives the central shaft 27 and the transmission connecting rod 19 to rotate, and the protrusion pin 191 slides along the receiving groove 181 and drives the pusher 18 to move along the guide frame 15.

[0056] The pusher 18 drives multiple mounting ring frames 11 to move synchronously along the axial direction of the load-bearing sleeve 9. During the movement of the mounting ring frames 11, the first spur gear 172 rolls along the rack 16, and the first helical gear 171 drives the rotating gear ring 13 to rotate; the mirror-arranged adjacent rolling units 7 rotate in opposite directions. As a result, multiple rollers form rolling contact areas on the surface of the load-bearing sleeve 9 that migrate axially and circumferentially.

[0057] The rollers apply a restricted and position-varying radial force to the end of the cable 4 via the load-bearing sleeve 9, redistributing the support force concentrated at the fixed bending position due to housing settlement, lateral offset, or angular deflection. The circumferential reaction moments generated by the two rolling units 7 cancel each other out or reduce each other, decreasing the possibility of the joint 3 being subjected to additional torsional loads.

[0058] As the conversion block 21 continues to reciprocate, the reciprocating screw causes the first limit block 28 to re-engage with the second limit block 29, and the thermal deformation spring 22, conversion block 21, driven member 25 and limit structure return to their initial state so that they can store and release energy again in subsequent temperature cycles.

[0059] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A novel underground anti-settlement circuit branch box, comprising a cable branch box body, wherein a branch terminal is provided inside the cable branch box body, and connectors are fixedly installed on the outer walls of both ends of the branch terminal, with cables connected to the ends of the connectors, and a load-bearing sleeve fitted on the end of the cable near the connector, characterized in that: The cable branch box is equipped with an energy storage component, which is used to convert and store the heat energy generated by the cable operation into mechanical energy, and output driving force when the stored energy reaches the set conditions. A stress relief device is also provided, which includes rolling units arranged at intervals along the cable axis and sleeved on the outside of the cable, and a transmission assembly connected to the rolling units. The transmission assembly is connected to the energy storage assembly and the rolling unit respectively, and is used to convert the driving force output by the energy storage assembly into the reciprocating motion of the rolling unit along the axial direction of the bearing sleeve and the rotational motion around the axis of the bearing sleeve, so that the rolling contact area between the rolling unit and the bearing sleeve changes along the axial and circumferential directions of the bearing sleeve.

2. The novel underground anti-settlement circuit branch box according to claim 1, characterized in that: The number of the rolling units is multiple, and the multiple rolling units are spaced apart along the cable axis; when two adjacent rolling units reciprocate synchronously along the cable axis, they rotate in opposite directions around the cable axis respectively.

3. A novel underground anti-settlement circuit branch box according to claim 2, characterized in that: The rolling unit includes a mounting ring frame sleeved on the outside of the cable. A rotating toothed ring is rotatably mounted on the mounting ring frame via an annular guide structure. The rotating toothed ring can rotate relative to the mounting ring frame around the cable axis. Multiple pressing heads are spaced apart circumferentially on the inner wall of the rotating toothed ring.

4. A novel underground anti-settlement circuit branch box according to claim 3, characterized in that: The transmission assembly includes a guide frame on which a rack is fixedly mounted; the rolling unit also includes a drive component. The driving component includes a first helical gear and a first spur gear arranged coaxially. The first helical gear meshes with the rotary ring gear, and the first spur gear meshes with the rack.

5. A novel underground anti-settlement circuit branch box according to claim 4, characterized in that: A pusher is slidably mounted on the guide frame. The pusher is fixedly connected to multiple rolling units. One end of the pusher is provided with a receiving groove. The guide frame is also provided with a rotatable transmission link, one end of which is provided with a protruding pin, which is located in the receiving groove.

6. A novel underground anti-settlement circuit branch box according to claim 5, characterized in that: The energy storage component includes a slide rail and a conversion block slidably connected to the slide rail. One side of the conversion block abuts against a heat-deformation spring, and the other side of the conversion block abuts against a return spring. The conversion block is provided with a guide groove, and the energy storage component also includes a driven member. The driven member is provided with an eccentric pin, which is slidably disposed in the guide groove. When the conversion block slides along the slide rail, the driven member rotates about its own axis.

7. A novel underground anti-settlement circuit branch box according to claim 6, characterized in that: The energy storage component also includes a coil spring that is drivenly connected to the driven member. The coil spring is fitted around the outer periphery of the central shaft, and the central shaft is drivenly connected to the driving member.

8. A novel underground anti-settlement circuit branch box according to claim 7, characterized in that: The energy storage component includes a first rotation limiting block and a second rotation limiting block. The first rotation limiting block is provided with an insertion protrusion, and the second rotation limiting block is provided with an insertion groove corresponding to the insertion protrusion. The second rotation limit block is fixedly connected to the central shaft; The conversion block has a straight toothed section on its side, and the energy storage component also includes a reciprocating lead screw. One end of the reciprocating lead screw is provided with a control gear, which meshes with the straight toothed section. The first limit block is threadedly connected to the reciprocating lead screw.

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