Sealing structure of a buried cable branch box

Abstract

The application discloses a sealing structure of a buried cable branch box and particularly relates to the technical field of cable branch boxes, which comprises a branch box body, a plurality of sealing components are fixedly installed on the two side walls of the inner cavity of the branch box body, the sealing components comprise U-shaped frames, two vertical parts of each U-shaped frame are penetrated and fixed with fixed pipes, the outer surfaces of the two fixed pipes are fixedly provided with movable components, the outer surfaces of the two fixed pipes are fixedly and jointly connected with clamping components, and the outer surface of the fixed pipe away from the connecting assembly is fixedly provided with a positioning component. The sealing structure of the buried cable branch box can form double-layer sealing at the interface through the cooperation between the positioning component, the movable components and the clamping components, avoids the problem of single sealing structure, and is compatible with cables with different diameters through the cooperation between the two movable components and the clamping components, so that the interface adaptability is improved without additional plugging.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable branch box, in particular to a sealing structure of a buried cable branch box. BACKGROUND

[0002] With the rapid development of the modernization of the electric power industry, the power grid has been fully started. When the underground main cable needs to realize multi-loop branch power distribution at a certain distance, using the cable branch box as an important supporting equipment for power distribution is an economical and convenient and safe method. The buried cable branch box realizes the interconnection and docking of power cables in a flexible, economical and reliable way. Its simple and convenient connection and combination form makes it replace the cable intermediate joint in more and more occasions.

[0003] In the process of using the buried cable branch box, the single-layer sealing structure (such as relying only on flange bolt compression or sealing ring sealing) has low reliability, and small deformation or uneven stress can easily cause water seepage. The interface size is fixed, it is difficult to be compatible with cables of different diameters, and additional plugging is required, so that the interface adaptability is poor. In addition, the cable and the interface are rigidly connected, and when the underground settlement or external force pulls, the stress is concentrated at the interface, causing the sealing structure to deform. In addition, due to the weight of the cable itself, the cable will sink, causing the connection to be easily aged and cracked, which poses a certain safety risk. SUMMARY

[0004] The purpose of the present application is to solve the problems of water seepage due to single sealing structure, poor interface adaptability requiring additional plugging, stress concentration at the interface causing the sealing structure to deform, and the connection being easily aged and cracked due to the gravity of the cable itself in the process of using the buried cable branch box. A sealing structure of a buried cable branch box is provided.

[0005] In order to achieve the above purpose, the present application adopts the following technical sealing structure of a buried cable branch box:

[0006] The sealing structure comprises a branch box body, a plurality of sealing components are fixedly installed on the two side walls of the inner cavity of the branch box body, and a connecting assembly matched with the sealing components is fixedly arranged on the bottom wall of the inner cavity of the branch box body.

[0007] The sealing component comprises a U-shaped frame, two vertical parts of the U-shaped frame are fixedly penetrated with fixed pipes, movable components are fixedly arranged on the outer surfaces of the two fixed pipes, a push rod is fixedly arranged between the two movable components, a clamping component is fixedly and connectively arranged on the outer surfaces of the two fixed pipes, and a positioning component is fixedly arranged on the outer surface of the fixed pipe away from the connecting assembly.

[0008] The clamping component includes annular blocks, each of which is provided with a plurality of annular arrays of sliding grooves, and each of the two annular blocks is slidably provided with a group of annular arrays of sliding blocks on the side close to each other, and each of the sliding blocks in the same group is fixedly provided with a connecting rod matched with the sliding grooves on both sides.

[0009] Through the rotation of the two movable components, the two groups of sliding blocks move along the sliding grooves under the action of the connecting rods, and the two groups of sliding blocks are designed in a split type to flexibly clamp and seal the connection between the two annular blocks.

[0010] As a further description of the sealing structure of the above-mentioned buried cable branch box:

[0011] The two side walls of the inner cavity of the branch box body are fixedly provided with straight plates, and two symmetrical Z-shaped blocks are rotationally connected between the two side walls of the inner cavity of the branch box body, one side of one of the Z-shaped blocks is fixedly provided with a sealing plate one, and the lower side of the horizontal part of the other Z-shaped block is fixedly provided with a sealing plate two matched with the sealing plate one, the horizontal part of the Z-shaped block is inlaid with a silica gel piece matched with the straight plate, and one side of the sealing plate two is inlaid with a silica gel piece matched with the sealing plate one.

[0012] As a further description of the sealing structure of the above-mentioned buried cable branch box:

[0013] The positioning component includes a mounting tube fixed to the outer surface of the fixed tube, an annular gasket fixed in the inner cavity of the mounting tube, a plurality of annular arrays of positioning rods rotationally installed in the inner cavity of the mounting tube through torsion spring connectors, and a plurality of annular arrays of arc-shaped pieces rotationally installed in the inner cavity of the mounting tube through torsion spring connectors, and the outer surfaces of the plurality of arc-shaped pieces are jointly fixed with an elastic sealing ring matched with the inner surface of the annular gasket.

[0014] As a further description of the sealing structure of the above-mentioned buried cable branch box:

[0015] One end of the mounting tube is fixedly provided with a connecting ring, the outer surface of the connecting ring is threadedly connected with a sealing cover, the inner surface of the connecting ring is provided with a waterproof groove, and the inner surface of the connecting ring is fixedly provided with a flat-topped conical tube.

[0016] As a further description of the sealing structure of the above-mentioned buried cable branch box:

[0017] The movable component includes a fixed ring fixed to the fixed tube, a plurality of annular arrays of sliding grooves are formed in the outer surface of the fixed ring, a compression spring is fixed in the inner cavity of each of the sliding grooves, a ring-shaped plate is rotationally connected to one side of the fixed ring, and a plurality of annular arrays of arc-shaped grooves are formed in one side of the ring-shaped plate.

[0018] As a further description of the sealing structure of the above-mentioned buried cable branch box:

[0019] The outer surface of the fixed ring is rotationally connected with a rotating ring fixedly connected with the annular plate, the inner surface of the rotating ring is fixedly connected with a plurality of push blocks matched with the compression springs, the outer surface of the rotating ring is fixedly connected with a straight block, and the straight block is fixedly connected with the push rod.

[0020] Further description of the sealing structure of the buried cable branch box is as follows:

[0021] The annular blocks are rotationally connected with the annular plate, the two annular blocks are fixedly connected with an annular sealing plate, the plurality of connecting rods on the same side are matched with the arc-shaped grooves on the annular plate, and the plurality of sliding blocks on the same side are fixedly connected with elastic blocks on the side close to the center of the sliding groove.

[0022] Further description of the sealing structure of the buried cable branch box is as follows:

[0023] The outer surface of the fixed pipe close to the connecting assembly is fixedly connected with a support component, the support component comprises an annular block fixed to the fixed pipe, one side of the annular block is rotationally connected with an annular sheet, one side of the annular sheet is fixedly connected with a plurality of annular arrays of connecting springs, one side of the plurality of connecting springs is fixedly connected with a moving pipe, one side of the annular sheet is fixedly connected with a plurality of annular arrays of guide rods, the plurality of guide rods are slidingly connected with the moving pipe, the outer surface of the moving pipe is fixedly connected with two annular arrays of clamping blocks, and one side of the annular block is fixedly connected with a limiting assembly for limiting the movement track of the clamping blocks.

[0024] Further description of the sealing structure of the buried cable branch box is as follows:

[0025] The limiting assembly comprises a limiting ring plate fixedly connected with the annular block, the inner surface of the limiting ring plate is provided with two clamping grooves matched with the clamping blocks, the outer surface of the limiting ring plate is fixedly connected with a limiting pipe, and the inner surface of the limiting pipe is fixedly connected with an annular blocking strip.

[0026] Further description of the sealing structure of the buried cable branch box is as follows:

[0027] The outer surface of the moving pipe is fixedly connected with a rotating block, the rotating block is rotationally connected with L-shaped supports through torsional springs on both sides, and the ends, away from the rotating block, of the two L-shaped supports are jointly rotationally installed with guide wheels.

[0028] As described above, due to the adoption of the sealing structure of the buried cable branch box, the beneficial effects of the present application are as follows:

[0029] 1. The device can form a double-layer seal at the interface through the cooperation between the positioning component, the movable component and the clamping component, avoiding the problem of single sealing structure. Meanwhile, the cooperation between the two movable components and the clamping component can also be compatible with cables of different diameters, without the need for additional plugging, so that the adaptability of the interface is improved.

[0030] 2. The device can not only form a preliminary seal, but also flexibly clamp the cable through the positioning component, avoiding stress concentration caused by rigid fixation of the cable, thereby avoiding the problem of deformation of the sealing structure. When in use, the sealing cover is opened, the cable is passed through the flat-topped conical tube, passes through the four positioning rods, the end of the positioning rod close to the cable is a ball, which facilitates the cable to pass through, and under the action of the elastic force, a flexible support is formed on the cable. Then, the cable passes through the multiple arc-shaped pieces and contacts the inner surface of the arc-shaped piece, extruding the elastic sealing ring. At the same time, the elastic sealing ring can be tightly attached to the surface of the cable, forming a preliminary seal.

[0031] 3. The device can adapt to cables of different diameters through the expansion and contraction of the two groups of sliding blocks and the elastic blocks connected thereto, and can form a seal on cables of different diameters, thereby improving the applicability of the device. The connecting rods on the two groups of sliding blocks move simultaneously under the action of the arc-shaped grooves on both sides, causing the two groups of sliding blocks to expand. The cable can pass between the elastic blocks connected to the two groups of sliding blocks. When the push rod is loosened, the rotating ring starts to rotate under the contraction of the push block connected to the rotating ring and the compression spring. At the same time, the arc-shaped grooves on the annular plate move with the adapted connecting rods, causing the two groups of sliding blocks to start to contract. At the same time, the elastic blocks on the sliding blocks flexibly clamp the cable, sealing the cable between the two sliding grooves, thereby forming a secondary seal.

[0032] 4. The device can be used to support the cable through the support component, avoiding the cable from falling down and preventing the bending of the cable connection from causing the cable to age and crack. The device can also provide different directions of "support" for the cable, adjust the direction of the support according to the direction of the cable, and improve the applicability of the device. When the cable goes upwards, the two L-shaped supports are located on the upper side, and the guide wheels are located on the upper side of the cable, providing a downward force for the cable, so that the bending part of the cable increases in angle, the bending part is gentle, and the cable cracking is avoided. When the cable goes downwards, the two L-shaped supports are located on the lower side, and the guide wheels are located on the lower side of the cable, providing support for the cable to prevent the cable from falling down and avoid aging at the bending part. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 An overall structure schematic diagram provided by an embodiment of the present application is shown;

[0034] Figure 2 An overall structure cross-sectional view provided by an embodiment of the present application is shown;

[0035] Figure 3 A schematic view of a sealing component structure is shown according to an embodiment of the present application;

[0036] Figure 4 An exploded view of a sealing component structure is shown according to an embodiment of the present application;

[0037] Figure 5 A sectional view of a positioning component structure is shown according to an embodiment of the present application;

[0038] Figure 6 An exploded view of a positioning component structure is shown according to an embodiment of the present application;

[0039] Figure 7 A sectional view of a movable component structure is shown according to an embodiment of the present application;

[0040] Figure 8 An exploded view of a movable component structure is shown according to an embodiment of the present application;

[0041] Figure 9 A schematic view of a clamping component structure is shown according to an embodiment of the present application;

[0042] Figure 10 A sectional view of a clamping component structure is shown according to an embodiment of the present application;

[0043] Figure 11 An exploded view of a clamping component structure is shown according to an embodiment of the present application; Figure 1 ;

[0044] Figure 12 An exploded view of a clamping component structure is shown according to an embodiment of the present application; Figure 2 ;

[0045] Figure 13 A schematic view of a clamping component mounting cable is shown according to an embodiment of the present application;

[0046] Figure 14 A sectional view of a support component structure is shown according to an embodiment of the present application; Figure 1 ;

[0047] Figure 15 A sectional view of a support component structure is shown according to an embodiment of the present application; Figure 2 ;

[0048] Figure 16 An exploded view of a support component structure is shown according to an embodiment of the present application; Figure 1 ;

[0049] Figure 17 An exploded view of a support component structure is shown according to an embodiment of the present application; Figure 2;

[0050] Figure 18 A sectional view of a limiting assembly structure is shown according to an embodiment of the present application;

[0051] Figure 19 A schematic diagram of installation of a cable towards an upward side is shown according to an embodiment of the present application;

[0052] Figure 20 A schematic diagram of installation of a cable towards a downward side is shown according to an embodiment of the present application.

[0053] Legend:

[0054] 10, branch box; 11, straight plate; 12, Z-shaped block; 13, sealing plate one; 14, sealing plate two; 15, connecting assembly;

[0055] 20, sealing component; 21, U-shaped frame; 22, fixed tube;

[0056] 23, positioning component; 231, installation tube; 232, annular gasket; 233, elastic sealing ring; 234, arc-shaped piece; 235, positioning rod; 236, connecting ring; 237, sealing cover; 238, waterproof groove; 239, flat-topped conical tube;

[0057] 24, movable component; 241, fixed ring; 242, compression spring; 243, sliding groove; 244, annular plate; 245, arc-shaped groove; 246, push block; 247, rotating ring; 248, straight block;

[0058] 25, clamping component; 251, annular block; 252, sliding groove; 253, annular sealing plate; 254, sliding block; 255, connecting rod; 256, elastic block;

[0059] 26, push rod;

[0060] 27, supporting component; 271, annular block; 272, annular piece; 273, connecting spring; 274, guide rod; 275, moving tube; 276, clamping block; 277, limiting assembly; 2771, limiting ring plate; 2772, clamping groove; 2773, limiting tube; 2774, annular blocking strip; 278, rotating block; 279, L-shaped support; 280, guide wheel. DETAILED DESCRIPTION

[0061] The sealing structure of the buried cable branch box will be clearly and completely described in the embodiments of the present application with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0062] Embodiment one

[0063] As shown in Figure 1 and Figure 2 , the sealing structure of the buried cable branch box comprises a branch box body 10, the branch box body 10 is the box body of the cable branch, a plurality of sealing components 20 are fixedly installed on both side walls in the inner cavity of the branch box body 10, the sealing components 20 are used for installing the cable and sealing the branch box body 10 at the same time, the plurality of sealing components 20 installed can branch the cable, a connecting assembly 15 matched with the sealing components 20 is fixed on the bottom wall in the inner cavity of the branch box body 10, the connecting assembly 15 comprises a grounding bar, a female bar and a cable plug connector and the like, the plug is matched with the plug on the cable;

[0064] The conventional cable branch box usually connects the sealing cover plate to the box body by means of a hinge, so that the gap between the box body and the sealing cover plate will cause water or soil to seep into the branch box, and it is not convenient to open and maintain;

[0065] Then, as shown in Figure 2 , in order to seal the branch box body 10, straight plates 11 are fixed on both side walls in the inner cavity of the branch box body 10, two symmetrical Z-shaped blocks 12 are rotationally connected between the two side walls in the inner cavity of the branch box body 10, the horizontal part of one side of the Z-shaped block 12 cooperates with the straight plate 11 and can be tightly attached to the lower side of the straight plate 11, one of the Z-shaped blocks 12 has a sealing plate one 13 fixed on one side thereof, the horizontal part of the Z-shaped block 12 is fixedly connected with the sealing plate one 13, and the other Z-shaped block 12 has a sealing plate two 14 fixed on the lower side of the horizontal part thereof, matched with the sealing plate one 13, and the sealing plate two 14 is located on the lower side of the sealing plate one 13;

[0066] When opened, the Z-shaped block 12 connected with the sealing plate one 13 is first rotated, and then the Z-shaped block 12 connected with the sealing plate two 14 is rotated, so that the sealing plate one 13 and the sealing plate two 14 can both be in a vertical state, facilitating the maintenance of the components in the inner cavity of the branch box body 10;

[0067] The horizontal part of the Z-shaped block 12 is inlaid with a silica gel piece matched with the straight plate 11, and one side of the sealing plate two 14 is inlaid with a silica gel piece matched with the sealing plate one 13;

[0068] When sealing, first make the sealing plate two 14 rotate to the horizontal state, and then make the sealing plate one 13 rotate to the horizontal state, the sealing plate one 13 is pressed on the silica gel sheet of the sealing plate two 14, so that the gap between the sealing plate one 13 and the sealing plate two 14 is blocked, the silica gel sheet of the horizontal part of the Z-shaped block 12 is pressed against the straight plate 11 on the same side, and the gap is blocked, the sealing effect of the lifting device is improved.

[0069] Next, as shown in Figure 3 and Figure 4 , the sealing part 20 includes a U-shaped frame 21 fixed on the side wall of the inner cavity of the branch box 10, both vertical parts of the U-shaped frame 21 are fixed with fixed pipes 22, the outer surfaces of the two fixed pipes 22 are fixed with movable parts 24, the movable parts 24 are located on the side of the outer surfaces of the two fixed pipes 22 close to each other, a push rod 26 is fixed between the two movable parts 24, the push rod 26 is used to control the two movable parts 24 at the same time, and the outer surfaces of the two fixed pipes 22 are fixedly connected with clamping parts 25, the clamping parts 25 are located between the two movable parts 24.

[0070] Among them, the outer surface of the fixed pipe 22 away from the connecting assembly 15 is fixed with a positioning part 23, the positioning part 23 is used to position the cable and form a preliminary seal at the same time, and the outer surface of the fixed pipe 22 close to the connecting assembly 15 is fixed with a supporting part 27, the supporting part 27 is used to support the cable to prevent the cable from cracking and breaking due to gravity or bending force.

[0071] Next, as shown in Figure 5 and Figure 6 , the positioning part 23 includes a mounting pipe 231 fixed on the outer surface of the fixed pipe 22, an annular gasket 232 is fixed in the inner cavity of the mounting pipe 231, a plurality of annular arrays of positioning rods 235 are rotatably installed in the inner cavity of the mounting pipe 231 through torsion spring connectors, a plurality of annular arrays of arc-shaped sheets 234 are rotatably installed in the inner cavity of the mounting pipe 231 through torsion spring connectors, the torsion spring connector includes a U-shaped plate fixedly connected with the inner cavity of the mounting pipe 231, a rotating shaft is rotatably installed between the two vertical parts of the U-shaped plate, a connecting plate connected with the U-shaped plate through a torsion spring is fixed on the rotating shaft, the connecting plate of the torsion spring connector connected with the arc-shaped sheet 234 is fixedly connected on the outer surface of the arc-shaped sheet 234, and the connecting plate of the torsion spring connector connected with the positioning rod 235 is fixedly connected on one end of the positioning rod 235, so that the arc-shaped sheet 234 and the positioning rod 235 can be contracted under the action of the torsion spring.

[0072] A plurality of positioning rods 235 can support the cable passing through the mounting pipe 231, avoid rigid fixing of the cable, reduce stress concentration at the interface, and prevent deformation of the sealing structure;

[0073] In addition, the outer surfaces of the plurality of arc-shaped pieces 234 are fixedly connected with an elastic sealing ring 233 which is adapted to the inner surface of the annular gasket 232. The inner surface of the elastic sealing ring 233 is flush with the inner surfaces of the arc-shaped pieces 234, and is in the shape of a flat-topped cone, so as to facilitate the cable to pass through. At the same time, due to the elasticity of the elastic sealing ring 233, the elastic sealing ring 233 is tightly attached to the surface of the cable, thereby forming a preliminary seal.

[0074] In addition, the length of the annular gasket 232 is greater than that of the elastic sealing ring 233, so that the elastic sealing ring 233 has a certain space for movement when being pressed;

[0075] In addition, one end of the mounting pipe 231 is fixedly connected with a connecting ring 236, and the outer surface of the connecting ring 236 is threadedly connected with a sealing cover 237. The sealing cover 237 can block the connecting ring 236 to form a seal. In the case that the sealing component 20 is not used, the sealing cover 237 is installed on the connecting ring 236. When it is needed to be used, the sealing cover 237 is removed, and a new cable can be installed, so that the sealing component 20 does not need to be opened when a new cable is installed, and the new cable can be quickly installed.

[0076] Then, the inner surface of the connecting ring 236 is provided with a waterproof groove 238 which can store water flowing into the inner cavity of the mounting pipe 231. The inner surface of the connecting ring 236 is fixedly connected with a flat-topped conical pipe 239 which is in the shape of a cone. The slope of the inner cavity of the flat-topped conical pipe 239 can block the penetrated water, so as to prevent the water from penetrating into the inner cavity of the mounting pipe 231.

[0077] Then, as shown in Figure 7 and Figure 8 The movable component 24 includes a fixed ring 241 which is fixed to the fixed pipe 22. The outer surface of the fixed ring 241 is provided with a plurality of annularly arranged sliding grooves 243. The inner cavities of the plurality of sliding grooves 243 are fixedly connected with compression springs 242. The compression springs 242 are in a compressed state and have a certain reverse tension after being stretched. One side of the fixed ring 241 is rotatably connected with an annular plate 244. The inner surface of the annular plate 244 is tightly attached to the outer surface of the fixed pipe 22, and the annular plate 244 is slidably connected with the fixed pipe 22. One side of the annular plate 244 is provided with a plurality of annularly arranged arc-shaped grooves 245.

[0078] The outer surface of the fixed ring 241 is rotatably connected with a rotating ring 247 which is fixedly connected with the annular plate 244. The inner surface of the rotating ring 247 is fixedly connected with a plurality of push blocks 246 which are adapted to the compression springs 242. The push blocks 246 are fixedly connected between the inner cavities of the sliding grooves 243 and the compression springs 242. Rotating the rotating ring 247 can make the push blocks 246 pull the compression springs 242. The reverse tension on the compression springs 242 can make the rotating ring 247 rotate in the opposite direction of the pulling, so as to make the annular plate 244 also rotate.

[0079] Then, the outer surface of the rotating ring 247 is fixed with a straight block 248, which is fixedly connected with the push rod 26. The straight blocks 248 on the two movable components 24 are fixedly connected with the push rod 26, so that the push rod 26 can control the rotation of the two rotating rings 247 at the same time.

[0080] Further, as shown in Figure 9 - Figure 11 , the clamping component 25 includes two annular blocks 251 fixedly connected with the fixed tubes 22. The two annular blocks 251 are fixed on the outer surfaces of the two fixed tubes 22, and are rotatably connected with the annular plates 244. The rotation of the annular plates 244 does not affect the annular blocks 251. A plurality of annular arrays of sliding grooves 252 are formed on the two annular blocks 251. The number of the sliding grooves 252 is twice the number of the arc-shaped grooves 245. The arc-shaped grooves 245 on the two annular plates 244 correspond to the sliding grooves 252 on the annular blocks 251 one by one. That is, the arc-shaped grooves 245 on the two annular plates 244 are different in angle, so that the arc-shaped grooves 245 on the annular plates 244 correspond to the sliding grooves 252 on the annular blocks 251 at intervals. The two annular blocks 251 are fixedly connected with an annular sealing plate 253.

[0081] Then, a group of annular arrays of sliding blocks 254 are slidably installed on the sides of the two annular blocks 251 close to each other. The sliding blocks 254 on the two sides are slidably connected. A connecting rod 255 adapted to the sliding grooves 252 on the two sides is fixedly penetrated through the plurality of sliding blocks 254 in the same group. The plurality of connecting rods 255 on the same side are located in the inner cavities of the sliding grooves 252 on the two annular blocks 251 at intervals. The plurality of connecting rods 255 on the same side are adapted to the arc-shaped grooves 245 on the annular plates 244. The plurality of connecting rods 255 on the same side are located in the inner cavities of the arc-shaped grooves 245 away from the side. The plurality of connecting rods 255 close to the support component 27 are located in the inner cavities of the arc-shaped grooves 245 close to the positioning component 23. The plurality of connecting rods 255 close to the positioning component 23 are located in the inner cavities of the arc-shaped grooves 245 close to the support component 27. The sides of the plurality of sliding blocks 254 on the same side close to the center of the sliding grooves 252 are fixedly provided with elastic blocks 256. The elastic blocks 256 are elastic and can be stretched in the compressed state.

[0082] As shown in Figure 12 and Figure 13 , the rotation of the two movable components 24 causes the two groups of sliding blocks 254 to move along the sliding grooves 252 under the action of the connecting rods 255. The two groups of sliding blocks 254 are designed in a split type, which clamps and seals the connection between the two annular blocks 251.

[0083] Example Two

[0084] This embodiment further limits the support component 27 based on the first embodiment to support the cable and prevent the aging of the bending part of the cable.

[0085] Further, as Figure 14 — Figure 17 shown in the drawings, the support component 27 comprises a ring block 271 fixed on the fixed tube 22, the ring block 271 is rotatably connected with a ring-shaped sheet 272 on one side, a plurality of ring-shaped arrays of connecting springs 273 are fixed on one side of the ring-shaped sheet 272, a moving tube 275 is fixed on one side of the plurality of connecting springs 273, the moving tube 275 is provided with mounting holes for mounting the connecting springs 273 on one side, the connecting springs 273 are fixedly connected with the side wall of the mounting hole, and the connecting springs 273 are in a compressed state under normal conditions, so that the connecting springs 273 are tightly attached to the ring-shaped sheet 272 under normal conditions, a plurality of ring-shaped arrays of guide rods 274 are fixed on one side of the ring-shaped sheet 272, the plurality of guide rods 274 are slidably connected with the moving tube 275, the moving tube 275 is provided with circular holes for mounting the guide rods 274, so that the guide rods 274 can guide the movement of the moving tube 275, and the moving tube 275 can rotate with the ring-shaped sheet 272 due to the action of the guide rods 274;

[0086] Then, two ring-shaped arrays of clamping blocks 276 are fixed on the outer surface of the moving tube 275, and a limiting assembly 277 for limiting the movement trajectory of the clamping blocks 276 is fixed on one side of the ring block 271;

[0087] As shown in the drawings, Figure 18 the limiting assembly 277 comprises a limiting ring plate 2771 fixedly connected with the ring block 271, two clamping grooves 2772 adapted to the clamping blocks 276 are formed in the inner surface of the limiting ring plate 2771, the clamping blocks 276 can be clamped in the inner cavity of the clamping grooves 2772, so as to fix the connecting springs 273, a limiting tube 2773 is fixed on the outer surface of the limiting ring plate 2771, the distance between the limiting tube 2773 and the moving tube 275 is just adapted to the thickness of the clamping blocks 276, an annular blocking strip 2774 is fixed on the inner surface of the limiting tube 2773, the annular blocking strip 2774 is tightly attached to the surface of the moving tube 275, so that the clamping blocks 276 can only move to the position tightly attached to the annular blocking strip 2774, thereby limiting the movement distance of the moving tube 275, facilitating the control of the rotation of the moving tube 275, and ensuring the stability of the moving tube 275;

[0088] Then, a rotating block 278 is fixed on the outer surface of the moving tube 275, L-shaped supports 279 are rotatably connected with the rotating block 278 on both sides through torsional springs, the L-shaped supports 279 have a certain turning force under the action of the torsional springs, a guide wheel 280 is rotatably installed at the ends of the two L-shaped supports 279 away from the rotating block 278, and the guide wheel 280 is used for guiding the cable;

[0089] As Figure 19 and Figure 20As shown, by rotating the moving pipe 275, the L-shaped support 279 has two states, one is that the cable is upward, the two L-shaped supports 279 are located on the upper side, the guide wheels 280 are located on the upper side of the cable, the cable is provided with a force to the lower side, so that the angle of the cable bending part is increased, the bending part is flat, and the cable cracking condition is avoided, and the other is that the cable is downward, the two L-shaped supports 279 are located on the lower side, the guide wheels 280 are located on the lower side of the cable, the cable is provided with support, the cable is prevented from falling, and the bending part is prevented from aging.

[0090] It should be noted that the connecting assembly 15, the elastic sealing ring 233, the sealing cover 237 and the guide wheel 280 in the application are all prior art, and the installation mode and control method thereof also belong to conventional design, which will not be described in detail.

[0091] The working principle of the application is that: the device is a buried cable branch box sealing structure, the mutual cooperation between the positioning component 23, the movable component 24 and the clamping component 25 can form double-layer sealing at the interface, avoid the problem of single sealing structure, and the mutual cooperation between the two movable components 24 and the clamping component 25 can also be compatible with cables of different diameters, so that the adaptability of the interface is improved.

[0092] The positioning component 23 not only forms preliminary sealing, but also flexibly clamps the cable, avoids stress concentration caused by rigid fixation of the cable, and avoids the problem of deformation of the sealing structure.

[0093] In use, the sealing cover 237 is opened, the cable passes through the flat-topped conical pipe 239, passes through the four positioning rods 235, the end of the positioning rod 235 close to the cable is a ball, which facilitates the cable to pass through, and under the action of the elasticity, the cable is flexibly supported, then the cable passes through the multiple arc-shaped pieces 234 and contacts the inner surfaces of the arc-shaped pieces 234, extrudes the elastic sealing ring 233, and at the same time that the cable passes through the elastic sealing ring 233, the elastic sealing ring 233 can be tightly attached to the surface of the cable to form preliminary sealing, and then the cable passes through the inner cavity of the fixed pipe 22.

[0094] The cable contacts the elastic block 256 after passing through the fixed pipe 22, at this time, by pushing the push rod 26, the straight blocks 248 on the two movable components 24 rotate with the rotating ring 247, so that the annular plate 244 fixedly connected with the rotating ring 247 rotates, and the connecting rod 255 fixedly connected with the sliding block 254 moves in the inner cavity of the sliding groove 252 under the action of the arc-shaped groove 245, so that the connecting rod 255 on the two groups of sliding blocks 254 moves at the same time under the action of the arc-shaped groove 245 on the two sides, the two groups of sliding blocks 254 expand, and the cable can pass through between the elastic blocks 256 connected with the two groups of sliding blocks 254.

[0095] After the cable is pulled out from the other fixed tube 22, the push rod 26 is loosened, the rotating ring 247 starts to rotate back under the contraction of the push block 246 connected by the rotating ring 247 and the compression spring 242, and the arc-shaped slot 245 on the annular plate 244 moves with the adapted connecting rod 255, so that the two groups of sliding blocks 254 start to contract, and the elastic blocks 256 on the sliding blocks 254 flexibly clamp the cable. Figure 12 and Figure 13 As shown, the cable is sealed between the two sliding grooves 252, thereby forming a secondary seal.

[0096] Through the expansion and contraction of the two groups of sliding blocks 254, the sliding blocks 254 and the connected elastic blocks 256 can adapt to cables of different diameters and form seals on cables of different diameters, thereby improving the applicability of the device.

[0097] The support component 27 can be used to support the cable, avoid the cable from falling, prevent the bending of the cable connection from causing the cable to age and crack, and also provide different directions of "support" for the cable, adjust the direction of support according to the direction of the cable, and improve the applicability of the device.

[0098] After the cable is pulled out from the fixed tube 22, it passes through the groove on the guide wheel 280, and then connects the elbow-shaped cable connector with the interface on the clamping component 25.

[0099] By pulling the moving tube 275, the two clamping blocks 276 are pulled out from the two clamping grooves 2772, then the moving tube 275 is rotated by one hundred and eighty degrees, so that the two L-shaped supports 279 are rotated by one hundred and eighty degrees and located at the symmetric position of the initial position, then under the action of the connecting spring 273, the moving tube 275 is retracted, and the two clamping blocks 276 enter the two clamping grooves 2772, preventing the moving tube 275 from rotating.

[0100] As shown in Figure 19 and Figure 20 By rotating the moving tube 275, the L-shaped supports 279 have two states, one is that the cable goes up, the two L-shaped supports 279 are located on the upper side, and the guide wheel 280 is located on the upper side of the cable, providing a downward force for the cable, so that the bending part of the cable increases in angle and the bending part is flat, avoiding the cracking of the cable, and the other is that the cable goes down, the two L-shaped supports 279 are located on the lower side, and the guide wheel 280 is located on the lower side of the cable, providing support for the cable to prevent the cable from falling and avoid aging of the bending part.

[0101] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can make equivalent replacements or changes to the sealing structure of the buried cable branch box and the inventive concept of the present application within the technical scope disclosed by the present application, and all should be covered within the protection scope of the present application.

Claims

1. A sealing structure for an underground cable branch box, comprising a branch box body (10), characterized in that: Multiple sealing components (20) are fixedly installed on both sides of the inner cavity of the branch box (10), and a connecting component (15) adapted to the sealing component (20) is fixed on the bottom wall of the inner cavity of the branch box (10). The sealing component (20) includes a U-shaped frame (21), with a fixed tube (22) fixedly inserted through each of the two vertical parts of the U-shaped frame (21). Movable components (24) are fixedly attached to the outer surfaces of the two fixed tubes (22), and a push rod (26) is fixed between the two movable components (24). A clamping component (25) is fixedly connected to the outer surfaces of the two fixed tubes (22), and a positioning component (23) is fixedly attached to the outer surface of the fixed tube (22) on the side away from the connecting component (15). The clamping component (25) includes annular blocks (251), and each of the two annular blocks (251) is provided with a plurality of annular array sliding grooves (252). A set of annular array sliding blocks (254) is slidably installed on the side of the two annular blocks (251) that are close to each other. A connecting rod (255) that is adapted to the sliding grooves (252) on both sides is fixed through the plurality of sliding blocks (254) in the same group. The rotation of the two movable parts (24) causes the two sets of sliding blocks (254) to move along the sliding groove (252) under the action of the connecting rod (255). The two sets of sliding blocks (254) adopt a split design to flexibly clamp the cable and seal the connection of the two annular blocks (251).

2. The sealing structure of the underground cable branch box according to claim 1, characterized in that, The inner walls of the branch box (10) are fixed with straight plates (11). Two symmetrical Z-shaped blocks (12) are rotatably connected between the inner walls of the branch box (10). One of the Z-shaped blocks (12) has a sealing plate (13) fixed on one side. The other Z-shaped block (12) has a sealing plate (14) that matches the sealing plate (13) fixed on the lower side of the horizontal part. The horizontal part of the Z-shaped block (12) is inlaid with a silicone sheet that matches the straight plate (11). The sealing plate (14) has a silicone sheet that matches the sealing plate (13) inlaid on one side.

3. The sealing structure of the underground cable branch box according to claim 1, characterized in that, The positioning component (23) includes a mounting tube (231) fixed to the outer surface of the fixing tube (22). An annular gasket (232) is fixed in the inner cavity of the mounting tube (231). A plurality of positioning rods (235) in an annular array are rotatably mounted in the inner cavity of the mounting tube (231) through a torsion spring connector. A plurality of arc-shaped pieces (234) in an annular array are rotatably mounted in the inner cavity of the mounting tube (231) through a torsion spring connector. An elastic sealing ring (233) that is adapted to the inner surface of the annular gasket (232) is fixed together on the outer surface of the plurality of arc-shaped pieces (234).

4. The sealing structure of an underground cable branch box according to claim 3, characterized in that, One end of the mounting tube (231) is fixed with a connecting ring (236), the outer surface of the connecting ring (236) is threaded with a sealing cap (237), the inner surface of the connecting ring (236) is provided with a waterproof groove (238), and the inner surface of the connecting ring (236) is fixed with a flat-topped conical tube (239).

5. The sealing structure of an underground cable branch box according to claim 1, characterized in that, The movable component (24) includes a fixed ring (241) fixed on a fixed tube (22). The outer surface of the fixed ring (241) is provided with a plurality of annular array grooves (243). A compression spring (242) is fixed in the inner cavity of each of the plurality of grooves (243). An annular plate (244) is rotatably connected to one side of the fixed ring (241). An arc-shaped groove (245) is provided on one side of the annular plate (244).

6. The sealing structure of an underground cable branch box according to claim 5, characterized in that, The outer surface of the fixed ring (241) is rotatably connected to a rotating ring (247) which is fixedly connected to the annular plate (244). The inner surface of the rotating ring (247) is fixed with a plurality of push blocks (246) that are adapted to the compression spring (242). The outer surface of the rotating ring (247) is fixed with a straight block (248). The straight block (248) is fixedly connected to the push rod (26).

7. The sealing structure of an underground cable branch box according to claim 6, characterized in that, The annular block (251) is rotatably connected to the annular plate (244), and an annular sealing plate (253) is fixed between the two annular blocks (251). Multiple connecting rods (255) on the same side are adapted to the arc groove (245) on the annular plate (244). Multiple sliding blocks (254) on the same side are all fixed with elastic blocks (256) on the side near the center of the sliding groove (252).

8. The sealing structure of an underground cable branch box according to claim 1, characterized in that, A support member (27) is fixed to the outer surface of the fixed tube (22) near the connecting component (15). The support member (27) includes a ring block (271) fixed to the fixed tube (22). A ring plate (272) is rotatably connected to one side of the ring block (271). A plurality of ring array connecting springs (273) are fixed to one side of the ring plate (272). A moving tube (275) is fixed to one side of the plurality of connecting springs (273). A plurality of ring array guide rods (274) are fixed to one side of the ring plate (272). The plurality of guide rods (274) are slidably connected to the moving tube (275). Two ring array locking blocks (276) are fixed to the outer surface of the moving tube (275). A limiting component (277) for limiting the movement trajectory of the locking blocks (276) is fixed to one side of the ring block (271).

9. The sealing structure of an underground cable branch box according to claim 8, characterized in that, The limiting component (277) includes a limiting ring plate (2771) fixedly connected to the ring block (271). The inner surface of the limiting ring plate (2771) has two slots (2772) that are adapted to the locking block (276). The outer surface of the limiting ring plate (2771) is fixed with a limiting tube (2773), and the inner surface of the limiting tube (2773) is fixed with an annular stop bar (2774).

10. The sealing structure of an underground cable branch box according to claim 8, characterized in that, The outer surface of the movable tube (275) is fixed with a rotating block (278). Both sides of the rotating block (278) are rotatably connected to L-shaped brackets (279) by torsion springs. The ends of the two L-shaped brackets (279) away from the rotating block (278) are rotatably mounted with guide wheels (280).

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