Buried cable branch box

Abstract

The invention relates to the technical field of cable installation, in particular to a buried cable branch box which comprises a branch box body and a box cover, a slot is formed in one side of the box body, an insertion plate at the lower end of the box cover can be inserted into the slot, a sliding plate is arranged on the slot, a deconcentrator is arranged between vertical plates on the two sides in the box body, and sliding blocks on the two sides of the deconcentrator are matched with sliding grooves of the vertical plates to achieve lifting. A plurality of groups of wiring sleeves are arranged on one side, close to the sliding plate, of the box body, a rotatable turntable is arranged on one side, opposite to the slot, of the box body, a main cable inlet pipe is eccentrically arranged on the turntable, transmission is carried out through a coaxial bevel gear shaft, a driven gear shaft and a winding roller, a traction steel wire rope drives a sliding block and a deconcentrator to ascend and descend, and the deconcentrator is linked with the sliding plate through a fixing plate; branching holes in the sliding plate correspond to branching wire sleeves, branching guiding is facilitated, and the rotating disc is provided with an eccentric distance adjusting module used for compensating bending of the main cable and maintaining sealing. The structure can enlarge the wiring operation space, reduce the construction difficulty and improve the reliability.

Description

Technical Field

[0001] This invention relates to the field of cable installation technology, and in particular to an underground cable branch box. Background Technology

[0002] Cable distribution boxes are commonly used cable connection and branching devices in power systems, widely applied in urban power distribution networks, industrial park power supply, and low-voltage power distribution systems in residential areas. Depending on the installation method, cable distribution boxes can be divided into two categories: floor-mounted and underground. Underground cable distribution boxes typically have the entire box body buried underground, with only inspection wells or covers visible above ground. They offer advantages such as saving ground space, reducing exposed facilities, and improving safety, making them widely used in roads, green belts, and public places. Existing underground cable distribution boxes generally include a distribution box body, a cover, and an internal distributor. Cable ends are introduced into the box through inlet pipes, and the distributor enables cable connection and branching.

[0003] In the prior art, Chinese patent document CN119134203A discloses a buried power engineering cable branch box, which includes a box body, branch terminal, protective components, stabilizing components and auxiliary components. The box body is spliced ​​together with a fence, an upper cover plate and a lower cover plate. A main line interface is opened on one side of the fence. The stabilizing box supports the cable and the connected interface to avoid the problem of cable sagging and breakage at the connection. At the same time, two elliptical rollers are installed inside the stabilizing components, which press against the cable. When the cable is subjected to tension, the elliptical rollers rotate under the frictional resistance between the elliptical rollers and the cable surface to clamp the cable, thereby effectively preventing the cable from detaching.

[0004] However, this technology, like traditional methods, still has shortcomings in practical use. First, the internal space of the branch box is limited. After installing components such as splitters and wiring sleeves, the space left for operators is extremely small, resulting in limited tools, inconvenient operation, and even easy misconnection during wiring. Second, the underground installation method makes the box position lower than the ground, requiring operators to bend over or squat to enter the wellhead when wiring or maintenance, which further restricts the operating space and increases labor intensity and safety risks. In addition, most existing branch box structures are fixed and lack the ability to flexibly adjust the position of internal components, making construction difficult and inefficient when dealing with different incoming line directions or multiple sets of branch cables.

[0005] Furthermore, we disclose an underground cable branch box to meet the practical needs of existing underground branch boxes, which have limited operating space and increased construction difficulty. Summary of the Invention

[0006] In view of this, the purpose of this invention is to provide an underground cable branch box to solve the problem of limited operating space and inconvenience for wiring construction in the prior art.

[0007] To achieve the above objectives, the present invention provides an underground cable branch box, comprising a branch box body, a cover mounted on the upper end of the branch box body, a slot formed in the middle of one side of the branch box body, an insert plate fixedly connected to the middle of the lower side of the cover, the insert plate being inserted into the slot, upright plates fixedly connected to both sides of the middle of the inner bottom surface of the branch box body, a splitter for splitting the power supply being disposed between the two upright plates, a plurality of branch connector sleeves disposed on the side of the splitter near the slot, a main interface sleeve disposed in the middle of the side of the splitter away from the branch connector sleeves, and the splitter being slidably connected... Attached to the two upright plates, a turntable is rotatably connected to the center of the side of the branch box away from the slot. A crank is provided at the upper end of one side of the turntable. The main cable inlet pipe is provided on the turntable and is eccentrically positioned on the turntable. Rotating the turntable can position the main cable inlet pipe at the upper end of the branch box. An adjustment component is provided on the side of the turntable near the splitter. The adjustment component is driven by the turntable to adjust the height of the splitter. A sliding plate is slidably connected to the slot. When the splitter moves, the sliding plate can move synchronously.

[0008] Preferably, sliders are fixedly connected to the middle of both ends of the splitter, the upper end of the slider is higher than the top surface of the branch box, and grooves are provided on both upright plates. The grooves are arranged along the height direction, and the two sliders are slidably connected to the two grooves respectively.

[0009] Preferably, the adjustment assembly includes a connecting plate fixedly connected to the inner wall of the branch box on the side away from the slide plate, a driving bevel gear shaft fixedly connected to the middle of the turntable, the middle of the optical axis of the driving bevel gear shaft engaging and rotatably connected to the connecting plate, a driven bevel gear shaft meshing with one side of the driving bevel gear shaft, a winding roller fixedly connected to the side of the driven bevel gear shaft away from the driving bevel gear shaft, and the end of the winding roller away from the driven bevel gear shaft engaging and rotatably connected to the branch box.

[0010] Preferably, a steel wire rope is fixedly connected to the winding roller, the steel wire rope is wound around the winding roller, and one end of the steel wire rope that is not fixedly connected to the winding roller is fixedly connected to the slider on one side. The steel wire rope passes through the upper end of the upright plate and is slidably connected to the upright plate.

[0011] Preferably, a return spring is fixedly connected to both sides of the lower end face of the splitter, and the lower ends of the two return springs are fixedly connected to the branch box.

[0012] Preferably, a fixing plate is fixedly connected to the middle of the lower end face of the splitter, and the end of the fixing plate away from the splitter is fixedly connected to the slide plate. A plurality of splitting holes are evenly spaced on the slide plate, and the number of splitting holes is the same as the number of splitting sleeves. The splitting holes are used to split cables into which they enter and connect to the splitting sleeves.

[0013] Preferably, the turntable is provided with an eccentric distance adjustment module, which is used to adjust the distance between the main cable inlet pipe and the turntable axis. The eccentric distance adjustment module includes a retaining sleeve that is rotatably connected to the outside of the main cable inlet pipe, and a connecting plate is fixedly connected to the upper end of the retaining sleeve.

[0014] Preferably, an opening groove is provided on one side of the center of the turntable, and a semi-circular groove with the same diameter as the ferrule is provided on the side of the opening groove away from the center of the turntable. A telescopic spring is fixedly connected to one side of the center of the upper end face of the connecting plate, and the upper end of the telescopic spring is fixedly connected to the inner top surface of the opening groove.

[0015] Preferably, a sealing and expandable layer is fixedly connected to the upper side of the connecting plate and the lower end of the sleeve, and the ends of the two sealing and expandable layers away from the sleeve are fixedly connected to the upper and lower ends of the opening groove, respectively.

[0016] Preferably, multiple sets of locking plates are provided on the outer side of the box cover and the branch box, and each set of locking plates is connected by bolts. A sealing gasket is provided between the box cover and the branch box.

[0017] The beneficial effects of this invention are:

[0018] 1. This type of underground cable branch box, by setting up a vertical plate, a sliding plate, and a distributor inside the branch box, and using an adjustment component to achieve height adjustment, allows the distributor to be smoothly raised and lowered to the top of the box with the operation of the turntable. At the same time, the sliding plate and the distributor work together to guide and connect the branched cables, effectively expanding the operable space inside the branch box. This solves the problem of small internal space and difficult operation of existing underground cable branch boxes, allowing operators to complete wiring work more conveniently and safely in a limited space.

[0019] 2. This type of underground cable branch box is equipped with an eccentric distance adjustment module to compensate for the turntable rotation jamming problem caused by the eccentric setting of the main cable inlet pipe. Through the cooperation of the clamp, connecting plate, telescopic spring and sealing telescopic layer, the main cable is kept in a relatively straight state when the turntable rotates eccentrically, avoiding the restriction of cable bending that affects the descent of the branch unit, thereby ensuring smooth movement of the branch unit and smooth branching operation, and significantly improving the reliability and safety of the wiring operation of the underground branch box. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this 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 three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is an exploded view of the present invention;

[0023] Figure 3 This is a schematic diagram of the internal three-dimensional structure of the present invention;

[0024] Figure 4 This is a three-dimensional schematic diagram of the turntable and its connecting structure of the present invention;

[0025] Figure 5 This is a three-dimensional schematic diagram of the turntable and its connecting structure of the present invention.

[0026] Figure 6 This is a three-dimensional schematic diagram of the main cable inlet pipe and its connection structure of the present invention;

[0027] Figure 7 This is a partial three-dimensional structural diagram of the present invention.

[0028] The diagram is marked as follows:

[0029] 1. Box cover; 2. Branch box body; 3. Turntable; 4. Slot; 5. Slide plate; 6. Branch hole; 7. Insert plate; 8. Vertical plate; 9. Brancher; 10. Connecting plate; 11. Return spring; 12. Wire rope; 13. Winding roller; 14. Driven bevel gear shaft; 15. Driven bevel gear shaft; 16. Handle; 17. Main cable inlet pipe; 18. Opening slot; 19. Telescopic spring; 20. Sealing telescopic layer; 21. Connecting plate; 22. Sleeve; 23. Slide groove; 24. Slider; 25. Main interface sleeve; 26. Branch cable sleeve; 27. Fixing plate. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0031] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0032] like Figures 1 to 7 As shown, an underground cable branch box includes a branch box body 2. A cover 1 is installed on the upper end of the branch box body 2. A slot 4 is opened in the middle of one side of the branch box body 2. An insert plate 7 is fixedly connected to the middle of the lower end of one side of the cover 1. The insert plate 7 is inserted into the slot 4. Upright plates 8 are fixedly connected to both sides of the middle of the inner bottom surface of the branch box body 2. A splitter 9 for splitting is arranged between the two upright plates 8. Multiple branch sleeves 26 are arranged on the side of the splitter 9 near the slot 4. A main interface sleeve 25 is arranged in the middle of the side of the splitter 9 away from the branch sleeves 26. The splitter 9 is slidably connected to the two upright plates 8. A turntable is rotatably connected to the middle of the side of the branch box body 2 away from the slot 4. 3. A crank handle 16 is provided on the upper end of one side of the turntable 3. A main cable inlet pipe 17 is provided on the turntable 3. The main cable inlet pipe 17 is eccentrically positioned on the turntable 3. When the turntable 3 is rotated, the main cable inlet pipe 17 can be positioned at the upper end of the branch box 2. An adjustment component is provided on the side of the turntable 3 near the splitter 9. The adjustment component is driven by the turntable 3 to drive the splitter 9 to adjust its height. A sliding plate 5 is slidably connected to the slot 4. When the splitter 9 moves, the sliding plate 5 can move synchronously. Multiple sets of locking plates are provided on the outer side of the box cover 1 and the branch box 2. Each set of locking plates is connected by bolts. A sealing gasket is provided between the box cover 1 and the branch box 2.

[0033] The branch box 2 has an upright plate 8 inside, and the splitter 9 is slidably connected to the upright plate 8. The height is adjusted by the cooperation of the slider 24 and the slide groove 23. At the same time, the slide plate 5 is linked with the splitter 9 to guide the splitter cable into the splitter sleeve 26 to complete the split connection. The adjustment component is composed of a turntable 3, a driving bevel gear shaft 15, a driven bevel gear shaft 14, a winding roller 13 and a steel wire rope 12. It realizes the height adjustment of the splitter 9 as the turntable 3 rotates, and provides an automatic return function through the return spring 11. Furthermore, in order to solve the problem that the main cable inlet pipe 17 is eccentrically set, making it difficult to bend the main cable when the turntable 3 rotates, the turntable 3... To address the issue of jamming, this application incorporates an eccentric distance adjustment module. This module includes a retaining sleeve 22, a connecting plate 21, a telescopic spring 19, and a sealing and retractable layer 20. It can automatically adjust the distance between the main cable inlet pipe 17 and the axis of the turntable 3 when the turntable 3 rotates eccentrically, reducing the bending degree of the main cable and ensuring the smooth descent of the distributor 9. This improves the convenience and safety of wiring operations. Through the above structural design, this application not only makes full use of the internal space of the branch box and reduces the difficulty of operation, but also takes into account the labor intensity and safety during the construction of the buried branch box, enabling reliable and efficient cable wiring and distribution functions.

[0034] Furthermore, such as Figures 1 to 7 As shown, sliders 24 are fixedly connected to the middle of both end faces of the splitter 9. The upper end of the sliders 24 is higher than the top surface of the branch box 2. Slide grooves 23 are provided on both upright plates 8, and the two sliders 24 are slidably connected to the two slide grooves 23 respectively. The adjustment assembly includes a connecting plate 10 fixedly connected to the inner wall of the branch box 2 on the side away from the slide plate 5. A drive bevel gear shaft 15 is fixedly connected to the middle of the turntable 3. The middle of the optical axis of the drive bevel gear shaft 15 is engaged and rotatably connected to the connecting plate 10. A driven bevel gear shaft 14 is meshed and connected to one side of the drive bevel gear shaft 15. A winding roller 13 is fixedly connected to the side of the driven bevel gear shaft 14 away from the drive bevel gear shaft 15. The end of the winding roller 13 away from the driven bevel gear shaft 14 is engaged and rotatably connected to the branch box 2. The winding roller 13 is fixedly connected to a steel wire rope 12. The steel wire rope 12 is wound around the winding roller 13, and one end of the steel wire rope 12 that is not fixedly connected to the winding roller 13 is fixedly connected to a slider 24 on one side. The steel wire rope 12 passes through the upper end of the vertical plate 8 and is slidably connected to the vertical plate 8. Both sides of the lower end face of the splitter 9 are fixedly connected to a return spring 11. The lower ends of the two return springs 11 are fixedly connected to the branch box 2. A fixing plate 27 is fixedly connected to the middle of the lower end face of the splitter 9. The end of the fixing plate 27 away from the splitter 9 is fixedly connected to the slide plate 5. Multiple splitting holes 6 are evenly spaced on the slide plate 5. The number of splitting holes 6 is the same as the number of splitting sleeves 26. The splitting holes 6 are used to split the cable into the cable and connect it to the splitting sleeve 26.

[0035] The main components of the adjustment assembly include a connecting plate 10: fixedly connected to the inner wall of the branch box 2, away from the slide plate 5, serving as a rigid base for supporting and positioning the active bevel gear shaft 15; a turntable 3 and a crank handle 16: rotational drive sources; the active bevel gear shaft 15 is fixedly connected to the middle of the turntable 3; the crank handle 16 is used for manually rotating the turntable 3; the active bevel gear shaft 15: its middle part is a smooth shaft journal, which engages with the connecting plate 10 and serves as a rotational support; one side is a bevel gear tooth that meshes with the bevel gear of the driven bevel gear shaft 14; the driven bevel gear shaft 14: meshes with the active bevel gear shaft 15; and a winding roller 13 is fixedly connected to its distal end; the winding roller 13: fixed or coaxial with the driven bevel gear shaft 14 via a bearing, used for winding / unwinding the wire rope 12; the wire rope 12: wound on the winding roller 13, one end of which is fixed / end-processed at the winding roller 13, which can be a fixed end or a clamping end depending on the implementation; and the other end is fixedly connected to... A slider 24 on one side, a vertical plate 8 and a sliding groove 23: A sliding groove 23 is opened on the vertical plate 8, and the sliding groove 23 is set along the height direction on the vertical plate 8. The slider 24 slides along the sliding groove 23 to realize the up and down sliding guide of the splitter 9. The slider 24 is fixed to the middle of the side end face of the splitter 9. The upper end of the slider 24 is higher than the top surface of the branch box 2. It is used to realize the lifting and lowering of the splitter 9 with the traction / limiting of the wire rope 12. The return spring 11 is set on both sides of the lower end face of the splitter 9. The lower end is fixed to the branch box 2. It serves as the source of the restoring force for the splitter 9 to return to its original position. The fixing plate 27 is fixed to the middle of the lower end face of the splitter 9. The end away from the splitter 9 is fixedly connected to the slide plate 5, so that the splitter 9 and the slide plate 5 are linked. The slide plate 5 and its branch holes 6: When the splitter 9 is lifted and lowered, the fixing plate 27 drives the slide plate 5 to move synchronously. The number of branch holes 6 corresponds to the number of branch sleeves 26. They are used for cable branching and connecting the branch sleeves 26.

[0036] Working principle of the adjustment component: When there is no input rotation, the distributor 9 is kept in the lower position or a predetermined low position by the return spring 11, the slider 24 is located at the lower end or middle of the slide groove 23, and the slide plate 5 is in the lower position, so that the distributor hole 6 and the distributor sleeve 26 are in the normal operating position. When it is necessary to expand the operating space, the operator grasps the crank handle 16 to rotate the turntable 3. The rotation torque is transmitted from the turntable 3 to the driving bevel gear shaft 15. The bevel gear of the driving bevel gear shaft 15 meshes with the driven bevel gear shaft 14, so that the driven bevel gear shaft 14 rotates synchronously. The driven bevel gear shaft 14 drives the winding roller 13 to rotate. The winding roller 13 tightens the wire rope 12 in the winding direction, so the wire rope 12 is fixed to one end of the slider 24. When tightened, slider 24 is pulled upward and moves up along slide groove 23, thereby driving the splitter 9 to move upward as a whole. Slide plate 5 is moved upward synchronously through the fixed plate. The operating space between the top of splitter 9 and the top of the box is increased accordingly, which facilitates wiring operations. When it is necessary to reset or release the lifting state, the crank handle 16 is rotated in the opposite direction to make the winding roller 13 release the wire, or the tightened wire rope 12 is directly released, so that the restoring force generated by the reset spring 11 pushes the splitter 9 to return to its original position. Slider 24 slides down along slide groove 23, and slide plate 5 falls down with it. The stiffness of reset spring 11 and the braking characteristics of winding roller 13 together determine the return speed and force of splitter 9. The preferred design makes the return smooth and stable.

[0037] In the implementation of this application, to avoid the situation where the turntable 3 rotates instantaneously due to the tension of the return spring 11 after the splitter 9 is adjusted to the upper position, the turntable 3 can be used in conjunction with a limiting or self-locking structure. Specifically, the limiting or self-locking structure can take various existing forms, such as: setting a limiting protrusion on the outer periphery of the turntable 3 and engaging it with the corresponding limiting groove of the housing; setting a ratchet and pawl mechanism on the winding roller 13 or the drive bevel gear shaft 15 to provide a one-way anti-backward function after lifting; or setting a friction plate brake or a manual locking pin between the turntable 3 and the housing to lock the position at any angle. The above-mentioned limiting or self-locking structures are all existing mature technologies, and this application does not limit them. The specific method can be determined according to actual needs.

[0038] In the implementation of this application, one end of the wire rope 12 needs to be reliably fixed to the slider 24 to realize the transmission function of the winding roller 13 driving the distributor 9 to rise and fall. This fixing method can be fully realized by existing mature conventional processes. For example, clamps can be used to directly clamp the end of the wire rope 12 to the slider 24, or the end can be formed by crimping and installed with the pre-set connection hole or slot of the slider 24. This type of fixing method has a simple structure and high strength, which can ensure that the wire rope does not loosen or break during long-term repeated winding and unwinding, thereby ensuring the stable and reliable lifting and lowering action of the distributor 9. Therefore, the technical solution of fixing the wire rope 12 to the slider 24 described in this application is fully feasible.

[0039] When assembling and implementing the recommendations, in order to ensure feasibility, the inner wall of the slide 23 should be machined into a straight guide surface. The slider 24 and the slide 23 should have an appropriate gap. A bushing, such as a polytetrafluoroethylene or nylon bushing, can be installed at the contact surface of the slide 23 / slider 24 to reduce friction, resist corrosion and extend service life. The upper end of the slider 24 is higher than the top surface of the branch box 2. When maintenance is required, it is convenient to observe, manually reset and operate. Its exposed part can be used as a gripper or have holes for easy fixing. The wire rope 12 should preferably be made of stainless steel braided rope or galvanized steel wire rope 12, and pass through the upper end of the vertical plate 8 through the guide hole or bushing to avoid wear and cutting. A sealing / lining kit should be installed at the point where the vertical plate 8 passes through, ensuring both guidance and sealing. The diameter, gear ratio, and number of winding turns of the winding roller 13 should match the diameter of the wire rope 12 and the required stroke to avoid cross-winding within the same turn. The winding roller 13 can be designed with a removable end cap for easy assembly and replacement of the wire rope 12. A bearing is used between the drive bevel gear shaft 15 and the connecting plate 10 to ensure smooth rotation and withstand axial / radial loads. The bevel gear should preferably be made of alloy steel and heat-treated, with the meshing surface precision-machined and equipped with a grease inlet for long-term maintenance. The return spring 11 should provide sufficient restoring force. When laying out the wire, the wire distributor 9 should be reliably pressed down to the reference position. At the same time, its rigidity should not be too large so that the winding roller 13 cannot overcome it. That is, the operating torque of the crank handle 16 should be within the acceptable range for manual operation. It is recommended to use fatigue-resistant spring steel and add anti-corrosion treatment for the spring material. Since the device is buried, all exposed parts, such as the winding roller 13, the bevel gear shaft end, and the wire rope 12 outlet, should preferably be made of stainless steel or have galvanized / anti-corrosion coating treatment. Rubber sealing rings should be used at the places where the wire rope passes through the box and the upright plate 8 to prevent mud and water from seeping in. A sealing gasket should be used between the sliding plate 5 and the box and the box cover 1 to maintain the overall sealing performance.

[0040] Preferred parameters for implementation: wire rope 12 diameter: φ1.5~φ3.0mm, selected according to load; winding roller 13 diameter: φ20~φ60mm, to prevent wire rope 12 from being too tight / bent; lateral clearance between slide groove 23 and slider 24: 0.5~2.0mm; preload of return spring 11: to ensure that the wire divider 9 is stably pressed into place without external force but without generating excessive reaction force.

[0041] Alternative implementation methods and preferred improvements: The bevel gear pair can be replaced with a worm gear drive to obtain stronger self-locking, but the rotation efficiency will be lower. Alternatively, a gear reducer + hoisting mechanism can be used to reduce the handle torque. The wire rope 12 can be replaced with a non-stretching synthetic fiber rope or a rigging with elastic compensation, depending on long-term weather resistance and maintenance requirements. To prevent overtravel, a mechanical limit block can be installed in the housing or a replaceable limit pin can be added to the drive shaft. When electronic monitoring is required, a limit switch can be installed at the slider 24 position to realize position detection. For easy maintenance, the winding roller 13 can be designed as a detachable structure or with an inspection cover to facilitate the replacement of the wire rope 12 or the addition of lubrication.

[0042] Furthermore, such as Figures 5 to 6 As shown, the turntable 3 is equipped with an eccentricity adjustment module, which is used to adjust the eccentricity between the main cable inlet pipe 17 and the axis of the turntable 3. Specifically, the eccentricity adjustment module includes a retaining sleeve 22 that is rotatably connected to the outside of the main cable inlet pipe 17. A connecting plate 21 is fixedly connected to the upper end of the retaining sleeve 22. An opening slot 18 is provided on one side of the middle of the turntable 3. A semi-circular groove with the same diameter as the retaining sleeve 22 is provided on the side of the opening slot 18 away from the middle of the turntable 3, which is used to limit and guide the retaining sleeve 22.

[0043] During the rotation of turntable 3, due to the eccentric arrangement of the main cable inlet pipe 17, the main cable inevitably undergoes a relative positional change with the internal structure of the branch box 2 during rotation. At this time, the clamp 22, within the semi-circular groove, can undergo a slight radial displacement under the elastic force of the telescopic spring 19, allowing the position of the main cable inlet pipe 17 relative to the axis of turntable 3 to be automatically adjusted, thereby effectively buffering the bending degree of the main cable. Simultaneously, the clamp 22 is connected to the connecting plate 21, causing the sealing expandable layer 20 to deform synchronously, ensuring good sealing continuity even with slight movement of the main cable, and avoiding risks such as water seepage and dust ingress caused by structural displacement. Thus, this eccentric distance adjustment module not only solves the problem of turntable 3 jamming due to the difficulty in bending the main cable, but also takes into account the overall sealing reliability during dynamic adjustment.

[0044] A telescopic spring 19 is fixedly connected to one side of the upper end face of the connecting plate 21, and the upper end of the telescopic spring 19 is fixedly connected to the inner top surface of the opening groove 18. By setting the telescopic spring 19, when the main cable inlet pipe 17 changes its relative position with the main cable due to the eccentric rotation of the turntable 3, the connecting plate 21 can drive the sleeve 22 to move along the semi-circular groove direction under the action of the telescopic spring 19, thereby automatically adjusting the actual eccentric distance of the main cable inlet pipe 17 to reduce the bending degree of the main cable.

[0045] Furthermore, to ensure the sealing performance of the branch box 2, a sealing expandable layer 20 is fixedly connected to the upper side of the connecting plate 21 and the lower end of the sleeve 22. The ends of the two sealing expandable layers 20 away from the sleeve 22 are fixedly connected to the upper and lower ends of the opening groove 18, respectively. When the sleeve 22 shifts within the semi-circular groove, the sealing expandable layer 20 can be stretched or compressed accordingly, thereby maintaining the sealing effect between the inlet pipe and the opening groove 18 and preventing external mud, sand, and moisture from entering the interior of the branch box 2.

[0046] Through the above structural design, when the turntable 3 rotates, the main cable inlet pipe 17 moves accordingly. If the main cable cannot bend due to its excessive rigidity, the clamp 22 can be displaced in the semi-circular groove. Under the elastic action of the telescopic spring 19, buffering and adjustment are achieved, so that the straight state of the main cable is basically maintained, avoiding resistance caused by excessive bending, ensuring that the turntable 3 can rotate smoothly, thereby driving the distributor 9 to descend normally, improving the convenience and reliability of wiring operations.

[0047] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0048] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. An underground cable branch box, characterized in that: The system includes a branch box (2), with a cover (1) installed on the upper end of the branch box (2). A slot (4) is provided in the middle of one side of the branch box (2). A plug plate (7) is fixedly connected to the middle of one side of the lower end of the cover (1). The plug plate (7) is inserted into the slot (4). Upright plates (8) are fixedly connected to both sides of the middle of the inner bottom surface of the branch box (2). A splitter (9) for splitting is provided between the two upright plates (8). Multiple splitter sleeves (26) are provided on the side of the splitter (9) near the slot (4). A main interface sleeve (25) is provided in the middle of the side of the splitter (9) away from the splitter sleeves (26). The splitter (9) is slidably connected to the two upright plates (8). A turntable (3) is rotatably connected to the middle of the side of the branch box (2) away from the slot (4). A crank (16) is provided on the upper end of one side of the turntable (3). A main cable inlet pipe (17) is provided on the turntable (3). The main cable inlet pipe (17) is eccentrically positioned on the turntable (3). When the turntable (3) is rotated, the main cable inlet pipe (17) can be positioned at the upper end of the branch box (2). An adjustment component is provided on the side of the turntable (3) near the splitter (9). The adjustment component is driven by the turntable (3) to drive the splitter (9) to adjust its height. A sliding plate (5) is slidably connected to the slot (4). When the splitter (9) moves, the sliding plate (5) can move synchronously.

2. The underground cable branch box according to claim 1, characterized in that: The splitter (9) has a slider (24) fixedly connected to the middle of both ends. The upper end of the slider (24) is higher than the top surface of the branch box (2). The two upright plates (8) are provided with sliding grooves (23). The sliding grooves (23) are set along the height direction. The two sliders (24) are slidably connected to the two sliding grooves (23) respectively.

3. The underground cable branch box according to claim 2, characterized in that: The adjustment assembly includes a connecting plate (10) fixedly connected to the inner wall of the branch box (2) on the side away from the slide plate (5). The turntable (3) is fixedly connected to the middle of an active bevel gear shaft (15). The middle of the optical axis of the active bevel gear shaft (15) is engaged and rotatably connected to the connecting plate (10). A driven bevel gear shaft (14) is meshed and connected to one side of the active bevel gear shaft (15). A winding roller (13) is fixedly connected to the side of the driven bevel gear shaft (14) away from the active bevel gear shaft (15). The end of the winding roller (13) away from the driven bevel gear shaft (14) is engaged and rotatably connected to the branch box (2).

4. The underground cable branch box according to claim 3, characterized in that: A steel wire rope (12) is fixedly connected to the winding roller (13). The steel wire rope (12) is wound around the winding roller (13), and one end of the steel wire rope (12) that is not fixedly connected to the winding roller (13) is fixedly connected to the slider (24) on one side. The steel wire rope (12) passes through the upper end of the vertical plate (8) and is slidably connected to the vertical plate (8).

5. A buried cable branch box according to claim 4, characterized in that: Both sides of the lower end face of the splitter (9) are fixedly connected with reset springs (11), and the lower ends of the two reset springs (11) are fixedly connected to the branch box (2).

6. The underground cable branch box according to claim 5, characterized in that: A fixing plate (27) is fixedly connected to the middle of the lower end face of the splitter (9). The end of the fixing plate (27) away from the splitter (9) is fixedly connected to the slide plate (5). A plurality of splitting holes (6) are evenly spaced on the slide plate (5). The number of splitting holes (6) is the same as the number of splitting sleeves (26). The splitting holes (6) are used to split the cable into the cable and connect it to the splitting sleeve (26).

7. The underground cable branch box according to claim 1, characterized in that: The turntable (3) is provided with an eccentric distance adjustment module. The eccentric distance adjustment module is used to adjust the distance between the main cable inlet pipe (17) and the axis of the turntable (3). The eccentric distance adjustment module includes a sleeve (22) that is rotatably connected to the outside of the main cable inlet pipe (17). A connecting plate (21) is fixedly connected to the upper end of the sleeve (22).

8. A buried cable branch box according to claim 7, characterized in that: An opening groove (18) is provided on one side of the middle part of the turntable (3). A semi-circular groove with the same diameter as the sleeve (22) is provided on the side of the opening groove (18) away from the middle part of the turntable (3). A telescopic spring (19) is fixedly connected to one side of the middle part of the upper end face of the connecting plate (21). The upper end of the telescopic spring (19) is fixedly connected to the inner top surface of the opening groove (18).

9. A buried cable branch box according to claim 8, characterized in that: A sealing and expandable layer (20) is fixedly connected to the upper side of the connecting plate (21) and the lower end of the sleeve (22). The ends of the two sealing and expandable layers (20) away from the sleeve (22) are fixedly connected to the upper and lower ends of the opening groove (18), respectively.

10. A buried cable branch box according to claim 1, characterized in that: Multiple sets of locking plates are provided on the outer side of the box cover (1) and the branch box (2), and each set of locking plates is connected by bolts. A sealing gasket is provided between the box cover (1) and the branch box (2).

Images