Waterproof plugging structure for cable hole of underground power tube well

Abstract

The invention discloses an underground power tube well cable hole waterproof plugging structure, and relates to the technical field of underground power tube wells, the underground power tube well cable hole waterproof plugging structure comprises two half tube sleeves which can be folded, and each half tube sleeve comprises a straight tube and a circular truncated cone tube which are connected; the first plugging unit comprises a plurality of first plugging blocks which are distributed in a circumferential array mode, and the first plugging blocks are connected to the circular truncated cone pipe in a sliding mode; the second plugging unit comprises a plurality of first plugging blocks which are distributed in a circumferential array; according to the waterproof plugging structure for the cable hole of the underground power tube well, after the two half tube sleeves are jointed and inserted into a cable pipeline, the first plugging blocks and the second plugging blocks located at the narrow opening end of the circular truncated cone tube can be conveniently inserted into the cable pipeline; afterwards, the peripheral side faces of the first plugging blocks and the peripheral side faces of the second plugging blocks can be driven to abut against the inner wall of the cable pipeline in a sealed mode through an arranged transmission mechanism, so that sealing between the two half pipe sleeves which are folded and the cable pipeline is completed, and meanwhile the two half pipe sleeves can be rapidly installed in the cable pipeline.

Description

Technical Field

[0001] The invention relates to the technical field of underground power pipe wells, and in particular to a waterproof plugging structure for cable holes in underground power pipe wells. Background Art

[0002] A cable well is an underground inspection well that plays a role in cable burying projects during construction and in installation or maintenance after the completion of the project. It usually contains cable ducts for laying cables. Since cable wells are usually arranged outdoors underground, after the cables are laid in the cable duct, there is usually a certain gap between the cable holes of the cable duct and the cables, which can easily cause groundwater to enter the cable duct and cause problems such as corrosion on the cable surface. To this end, cable holes are mostly sealed by filling with sealing materials such as foam glue. Not only does it take time for the foam glue to cool and solidify, but if the cable needs to be moved, it is often necessary to remove the foam glue in advance. The removal operation is time-consuming and labor-intensive, which increases the workload of the staff to a certain extent. Summary of the invention

[0003] The object of the present invention is to provide a waterproof plugging structure for cable holes in underground power pipe wells to solve the deficiencies in the above-mentioned prior art.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a waterproof sealing structure for a cable hole in an underground power pipe well, comprising two half-pipe sleeves that can be matched, each half-pipe sleeve comprising a connected straight pipe and a truncated cone pipe; a first sealing unit, comprising a plurality of first sealing blocks distributed in a circular array, each first sealing block being slidably connected to the truncated cone pipe; a second sealing unit, comprising a plurality of first sealing blocks distributed in a circular array, each second sealing block being slidably connected to the truncated cone pipe; each first sealing block and each second sealing block located at the narrow end of the truncated cone pipe have an alternating staggered abutment state, and each first sealing block and each second sealing block located at the wide end of the truncated cone pipe have an alternating docking state to form a circular sealing state; a transmission mechanism, which is used to drive each first sealing block and each second sealing block to slide from the narrow end of the truncated cone pipe to the wide end of the truncated cone pipe.

[0005] Preferably, the two frustum tubes are provided with first guide grooves corresponding to the first blocking blocks, the first guide grooves include a connected inclined section and a horizontal section, and the first blocking block is fixedly connected with a first slider located in the first guide groove; in the process of each first blocking block moving from the oblique lower end of the corresponding inclined section to the junction of the inclined section and the horizontal section, it can push each second blocking block to switch from abutting state to a sealing state, and at the same time make the expanded diameter of each first blocking block the same as the expanded diameter of each first blocking block in the sealing state, and in the process of each first blocking block sliding along the corresponding horizontal section, each first blocking block is respectively docked and inserted into the distance between two adjacent first blocking blocks, so that a circular sealing state is formed between the first blocking block and each first blocking block.

[0006] Preferably, the truncated cone tube is provided with second guide grooves corresponding to each second blocking block along the busbar direction, and each second blocking block is fixedly connected to a second slider located in the corresponding second guide groove. Each second blocking block is pushed by each first blocking block and slides along the oblique lower end to the oblique upper end of the corresponding second guide groove, so that the abutment state between each second blocking block and each second blocking block is switched to a sealing state.

[0007] Preferably, the transmission mechanism includes transmission components corresponding to the two half-pipe sleeves, and each transmission component includes: a rotating part, which is threadedly connected to the corresponding straight pipe; a sliding part, which is slidably connected to the outer wall of the straight pipe along the axial direction of the half-pipe sleeve, and the sliding part is rotationally connected to the rotating part; a plurality of connecting rods, one end of which is rotationally connected to the corresponding first blocking block, and the other end is slidingly and rotationally connected to the sliding part; a plurality of telescopic rods, one end of which is rotationally connected to the corresponding second blocking block, and the other end is rotationally connected to the sliding part.

[0008] Preferably, one of the half-tube sleeves is fixedly connected to a plurality of positioning posts, and the other half-tube sleeve is fixedly connected to positioning sockets corresponding to the positioning posts one by one.

[0009] Preferably, each of the sliding parts is provided with a semi-ring groove, and the two half-tube sleeves are matched to make the two semi-ring grooves dock to form an annular groove. Each rotating part is fixedly connected with a plurality of straight rods, and one end of each straight rod away from the rotating part is respectively located in the corresponding semi-ring groove.

[0010] Preferably, arc-shaped sealing gaskets are fixedly connected to the inner walls of the two straight tube outer ports.

[0011] In the above technical scheme, the present invention provides a waterproof sealing structure for cable holes in underground power pipe wells. After the cable is laid in the cable pipe in the power pipe well, the two half-pipe sleeves can be matched and spliced. At this time, the cable is located in the cavity formed by the two half-pipe sleeves. Thereafter, the two matched and spliced ​​half-pipe sleeves are inserted into the cable pipe along the outer surface of the cable. At this time, each first blocking block and each second blocking block are located at the narrow end of the truncated cone tube and are in an alternating staggered abutment state. At this point, the outer side surfaces of each first blocking block and each second blocking block will not contact the inner wall of the cable pipe during the process of inserting the cable into the cable pipe, thereby facilitating the connection. The two half-tube sleeves are inserted into the cable duct more smoothly, and then the transmission mechanism drives each first blocking block and each second blocking block to move from the narrow end of the truncated cone tube to the wide end of the truncated cone tube, so that each first blocking block and each second blocking block move from the alternating misaligned abutment state to the alternating abutment state to form a circular state, and the first blocking blocks and each second blocking blocks that move to the wide end of the truncated cone tube not only achieve the blocking of the gap between the two half-tube sleeves and the cable duct, but also drive the peripheral side surfaces of each first blocking block and each second blocking block to abut against the inner wall of the cable duct, so as to achieve the rapid installation of the entire device. When disassembling, the transmission mechanism is also used to drive each first blocking block and each second blocking block to retreat from the sealing state to the abutment state to release the abutment blockage on the inner wall of the cable duct, thereby completing the disassembly process. At this point, the entire installation process is convenient and easy, and the disassembly process is also simple and fast to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0013] Figure 1 A disassembled diagram of two half-tube sleeves provided in an embodiment of the present invention; Figure 2 A diagram of the mating of two half-tube sleeves provided in an embodiment of the present invention; Figure 3 A schematic diagram of the installation of two half-pipe sleeves provided in an embodiment of the present invention plugged into a cable duct; Figure 4 The motion state of each first blocking block and each second blocking block provided in the embodiment of the present invention Figure Ⅰ ; Figure 5 The motion state of each first blocking block and each second blocking block provided in the embodiment of the present invention Figure II ; Figure 6The motion state of each first blocking block and each second blocking block provided in the embodiment of the present invention Figure III ; Figure 7 A schematic structural diagram of a first guide groove provided in an embodiment of the present invention; Figure 8 A schematic structural diagram of an arc portion provided by an embodiment of the present invention; Fig. 9 The motion state of the arc portion provided by the embodiment of the present invention Figure Ⅰ ; Fig.10 The motion state of the arc portion provided by the embodiment of the present invention Figure II Fig.11 This is a schematic structural diagram of a first soft rubber pad and a second soft rubber pad provided in an embodiment of the present invention.

[0014] Description of reference numerals: 1. Half-tube sleeve; 101. Straight tube; 102. Cone tube; 2. First blocking block; 3. Second blocking block; 4. Transmission mechanism; 401. Rotating part; 402. Sliding part; 403. Connecting rod; 404. Telescopic rod; 5. First guide groove; 501. Inclined section; 502. Horizontal section; 6. Second guide groove; 7. Positioning column; 8. Positioning socket; 9. Semi-ring slide groove; 10. Straight rod; 11. Arc sealing pad; 12. First soft rubber pad; 13. Second soft rubber pad; 14. Arc-shaped part; 15. First abutment block; 16. Second abutment block; 17. Spiral groove; 18. Moving block. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0016] See also Figure 1-11A waterproof plugging structure for a cable hole in an underground power pipe well provided by an embodiment of the present invention comprises two half-pipe sleeves 1 that can be matched, a first plugging unit, a second plugging unit and a transmission mechanism 4, wherein each half-pipe sleeve 1 comprises a connected straight pipe 101 and a truncated cone pipe 102; the first plugging unit comprises a plurality of first plugging blocks 2 distributed in a circumferential array, and each first plugging block 2 is slidably connected to the truncated cone pipe 102; the second plugging unit comprises a plurality of first plugging blocks 2 distributed in a circumferential array, and each second plugging block 3 is slidably connected to the truncated cone pipe 102; each first plugging block 2 and each second plugging block 3 located at the narrow end of the truncated cone pipe 102 have an alternating staggered abutment state, and each first plugging block 2 and each second plugging block 3 located at the wide end of the truncated cone pipe 102 have an alternating docking state to form a circular sealing state; the transmission mechanism 4 is used to drive each first plugging block 2 and each second plugging block 3 to slide from the narrow end of the truncated cone pipe 102 to the wide end of the truncated cone pipe 102. It should be noted that each abutting surface of the two half-tube sleeves 1 is fixedly connected with a first sealing gasket, thereby improving the sealing between the two half-tube sleeves 1 under the matching; wherein the narrow end of the truncated cone tube 102 faces the cable duct, and it should be further noted that the diameter of the narrow end of the truncated cone tube 102 is smaller than the diameter of the wide end of the truncated cone tube 102, and thus when each first blocking block 2 and each second blocking block 3 move from the narrow end of the truncated cone tube 102 to the wide end of the truncated cone tube 102, each first blocking block 2 and each second blocking block 3 will be open to the surroundings and abut against the inner wall of the cable duct until each first blocking block 2 and each second blocking block 3 are alternately connected to form a circular structure, and thus the gap between the outer wall of the two half-tube sleeves 1 after matching and the inner wall of the cable duct can be blocked. wherein each first blocking block 2 and each second blocking block 3 in the alternating displaced abutting state are in a state of abutting front and back along the axial direction of the cable duct and from the inside to the outside. At this point, when the transmission mechanism 4 drives each first blocking block 2 to slide on the truncated cone tube 102 , each first blocking block 2 can push each second blocking block 3 to slide on the truncated cone tube 102 .

[0017] In this embodiment, arc-shaped sealing pads 11 are fixedly connected to the inner walls of the outer ports of the two straight tubes 101. At this point, when the two half-tube sleeves 1 are aligned, the two arc-shaped sealing pads 11 can squeeze the surface of the cable to complete the sealing between the two tube sleeves and the cable. In a preferred state, each arc-shaped sealing pad 11 can be formed by overlapping sealing soft rubber pads of different diameters, and each sealing soft rubber pad is made by bonding with adhesive. Based on the different diameters of the cables, each overlapping sealing soft rubber pad can be torn off to adapt to cables of different diameters. The two arc-shaped sealing pads 11 are arranged in a semicircle.

[0018] A plurality of positioning posts 7 are fixedly connected to one of the half-tube sleeves 1, and a positioning socket 8 corresponding to each positioning post 7 is fixedly connected to the other half-tube sleeve 1. Based on this, when each positioning post 7 is inserted into the corresponding positioning socket 8, the two half-tube sleeves 1 are in a matched state; in a further preferred state, the insertion end of the positioning post 7 is hemispherical, and there is a certain friction damping between the positioning post 7 and the corresponding positioning socket 8 during the insertion process, which is conducive to the staff driving the two matched half-tube sleeves 1 to move along the surface of the cable.

[0019] Specifically, after the cable is laid in the cable conduit in the power pipe well, the two half-pipe sleeves 1 can be matched and spliced. At this time, the cable is located in the cavity formed by the two half-pipe sleeves 1. Then, the two half-pipe sleeves 1 that have been matched and spliced ​​are inserted into the cable conduit along the outer surface of the cable. At this time, each first blocking block 2 and each second blocking block 3 are located at the narrow end of the truncated cone tube 102 and are in an alternating staggered abutment state. At this point, the outer side surfaces of each first blocking block 2 and each second blocking block 3 will not contact the inner wall of the cable conduit during the process of inserting into the cable conduit, thereby facilitating a smoother insertion of the two matched half-pipe sleeves 1 into the cable conduit. In the channel, the transmission mechanism 4 is then used to drive each first blocking block 2 and each second blocking block 3 to move from the narrow end of the truncated cone tube 102 to the wide end of the truncated cone tube 102, so that each first blocking block 2 and each second blocking block 3 are moved from the alternating misaligned abutting state to the alternating abutting state to form a circular state, and each first blocking block 2 and each second blocking block 3 moved to the wide end of the truncated cone tube 102 not only achieves the blocking of the gap between the two half-pipe sleeves 1 and the cable duct under the matching, but also can drive each first blocking block 2 and each second blocking block 3 The surrounding side surface is abutted against the inner wall of the cable duct, so as to achieve the rapid installation of the entire device. When disassembling, the transmission mechanism 4 is also used to drive each first blocking block 2 and each second blocking block 3 from the sealing state to the abutting state to release the abutting blockage on the inner wall of the cable duct, thereby completing the disassembly process. At this point, the entire installation process is convenient and easy, and the disassembly process is also simple and fast to operate.

[0020] Among them, the two truncated cone tubes 102 are provided with first guide grooves 5 corresponding to the first blocking blocks 2, and the first guide grooves 5 include a connected inclined section 501 and a horizontal section 502, and the first blocking block 2 is fixedly connected with a first slider located in the first guide groove 5; in the process that each first blocking block 2 moves from the oblique lower end of the corresponding inclined section 501 to the junction of the inclined section 501 and the horizontal section 502, it can push each second blocking block 3 to switch from the abutting state to the sealing state, and at the same time make the expanded diameter of each first blocking block 2 the same as the expanded diameter of each first blocking block 2 in the sealing state, and the process of each first blocking block 2 sliding along the corresponding horizontal section 502 makes each first blocking block 2 respectively dock and insert into the distance between two adjacent first blocking blocks 2, so that a circular sealing state is formed between the first blocking block 2 and each first blocking block 2.

[0021] Among them, the truncated cone tube 102 is provided with second guide grooves 6 corresponding to each second blocking block 3 along the busbar direction, and each second blocking block 3 is fixedly connected with a second slider located in the corresponding second guide groove 6. Each second blocking block 3 is pushed by each first blocking block 2 and slides along the oblique lower end to the oblique upper end of the corresponding second guide groove 6, so that the abutment state between each second blocking block 3 and each second blocking block 3 is switched to a sealing state.

[0022] Among them, the inclination of the inclined section 501 of the first guide groove 5 is greater than the inclination of the second guide groove 6. Based on this, when each first blocking block 2 is located at the junction of the inclined section 501 and the horizontal section 502, the outer side surface of the first blocking block 2 abuts against the inner wall of the cable pipe. At the same time, the outer side surface of the second blocking block 3 also abuts against the inner wall of the cable pipe.

[0023] Among them, it should be noted that when each first blocking block 2 and each second blocking block 3 are located at the wide end of the conical tube 102, the first blocking block 2 and each second blocking block 3 are in contact with the outer surface of the wide end of the conical tube 102. Based on this, a sealing rubber pad is laid and fixed on the conical surface of the conical tube 102, so that the first blocking block 2 and each second blocking block 3 are in a squeezed state with the sealing soft rubber pad on the conical surface of the conical tube 102 when in a sealed state, thereby improving the sealing performance.

[0024] Among them, it should be noted that the contact surfaces of each first sealing block 2 and each second sealing block 3 that abut the cable pipe are all arc-shaped and compatible with the cable pipe. Based on this, the contact surfaces of each first sealing block 2 and each second sealing block 3 that abut the cable pipe are fixedly connected with a second sealing gasket, thereby improving the sealing between each first sealing block 2 and each second sealing block 3 and the cable pipe when they are in a sealed state. At the same time, each second sealing gasket is provided with an anti-slip groove, and the length direction of the anti-slip groove is the axial direction of the cable pipe, thereby increasing the friction between each first sealing block 2, each second sealing block 3 and the cable pipe, which is beneficial for each first sealing block 2 to be inserted between two adjacent second sealing blocks 3 respectively, thereby completing the docking of each first blocking block 2 and each second blocking block 3 to form an alternating staggered circular sealing state.

[0025] It should be further explained that the contact surfaces between each first blocking block 2 and each second blocking block 3 in a sealed state are fixedly connected with a third sealing gasket, which is used to block the gap between each first blocking block 2 and each second blocking block 3, thereby further improving the sealing performance.

[0026] Among them, the transmission mechanism 4 includes transmission components corresponding to the two half-pipe sleeves 1, and each transmission component includes: a rotating part 401, a sliding part 402, a plurality of connecting rods 403 and a plurality of telescopic rods 404, the rotating part 401 is threadedly connected to the corresponding straight pipe 101; the sliding part 402 is slidably connected to the outer wall of the straight pipe 101 along the axial direction of the half-pipe sleeve 1, and the sliding part 402 is rotationally connected to the rotating part 401; one end of the plurality of connecting rods 403 is rotationally connected to the corresponding first blocking block 2, and the other end is slidingly and rotationally connected to the sliding part 402; one end of the plurality of telescopic rods 404 is rotationally connected to the corresponding second blocking block 3, and the other end is rotationally connected to the sliding part 402. It should be noted that one end of each connecting rod 403 close to the sliding part 402 is rotatably connected to the limit slider, and the sliding part 402 is provided with a limit slide groove for the limit slider to slide. Based on this, the horizontal direction of the limit slide groove is the radial direction of the sliding part 402. When each first blocking block 2 moves from the inclined section 501 to the horizontal section 502, the limit slider will slide along the limit slide groove. A docking hole is provided on the rotating part 401, which can be plugged into an external lever arm. After the external lever arm is inserted into the docking hole, the staff can drive the two rotating parts 401 to rotate by the lever arm, which is not only convenient for operation, but also can achieve a labor-saving effect by increasing the length of the lever arm.

[0027] Among them, an abutment plate with a diameter larger than the diameter of the cable pipe is fixedly connected at the junction of the wide end of the cone tube 102 and the straight tube 101, and a notch is provided on the abutment plate for each connecting rod 403 and each telescopic rod 404 to pass through. Based on this, in the process of inserting the two half-pipe sleeves 1 into the cable pipe, it plays a limiting role. When the staff drives the two rotating parts 401 to rotate the threads, the entire device can be driven to abut against the port of the cable pipe, so that the staff can drive the two rotating parts 401 to rotate the threads better and more labor-saving.

[0028] Among them, each sliding part 402 is provided with a semi-annular slide groove 9, and the two half-tube sleeves 1 under the matching make the two semi-annular slide grooves 9 dock to form an annular slide groove, and each rotating part 401 is fixedly connected with a plurality of straight rods 10, and one end of each straight rod 10 away from the rotating part 401 is respectively located in the corresponding semi-annular slide groove 9. Among them, one end of the straight rod 10 located in the semi-annular slide groove 9 is fixedly connected with a ball block, and the diameter of the ball block is larger than the cross-sectional area of ​​the end face of the straight rod 10. Based on this, the end face of the semi-annular slide groove 9 is adapted to the ball block, and the straight rod 10 can be restricted from leaving the semi-annular slide groove 9 along the axial direction of the half-tube sleeve 1. At this point, each straight rod 10 follows the process of the two rotating parts 401 rotating so that each ball block slides in the annular slide groove, and at the same time, it can drive the two sliding parts 402 to slide along the axial direction of the straight tube 101. It should be noted that, under normal conditions (two half-tube sleeves 1 that have been disassembled), the rotating portion 401 is also threadedly connected to the corresponding straight tube 101, and the end of each straight rod 10 close to the rotating portion 401 always has abutting force to abut the corresponding rotating portion 401 against the straight tube 101, while the end away from the rotating portion 401 is also located in the semi-ring groove 9. Therefore, when the rotating portion 401 rotates without receiving external force, the rotating portion 401 will always be threadedly connected to the corresponding straight tube 101 and will not be separated from the straight tube 101.

[0029] Based on the above, when the two rotating parts 401 under the matching are rotated along the threads of the straight pipe 101 under the matching, the two sliding parts 402 can be driven to move linearly along the straight pipe 101. At this time, each first blocking block 2 connected by the connecting rod 403 will move along the inclined section 501. At the same time, the first blocking block 2 will push the second blocking block 3 to slide along the first guide groove 5 and move to a sealed state. After that, each first blocking block 2 will slide along the horizontal section 502 to a sealed state. At this point, a circular sealing structure will be alternately formed between each first blocking block 2 and each second blocking block 3, thereby completing the sealing of the gap between the two half-pipe sleeves 1 and the inner wall of the cable pipeline.

[0030] When the first blocking block 2 slides along the horizontal section 502, the telescopic rod 404 between the sliding part 402 and each second blocking block 3 will switch from a contracted state to an extended state, so that each second blocking block 3 is always in a sealed state. When disassembling, the two rotating parts 401 will retreat along the thread, and the sliding part 402 will first cause the first blocking block 2 to slide along the horizontal section 502 to the junction with the inclined section 501, and the telescopic rod 404 at this time will switch from an extended state to a contracted state, and then the sliding part 402 will simultaneously push each first blocking block 2 and the second blocking block 3 to move to the narrow end of the truncated cone tube 102, so that each first blocking block 2 and each second blocking block 3 are in an alternating dislocated abutment state. Based on this, the disassembly work of the entire device is completed, and the disassembly process is simple and convenient.

[0031] The two half-tube sleeves 1 in the engagement may preferably be inserted into the cable duct first. At this time, the arc-shaped sealing pads 11 on the two half-tube sleeves 1 can seal the gap between the cable and the two half-tube sleeves 1. However, the arc-shaped sealing pads 11 increase the difficulty of conveying the cable. Based on this, as a preferred technical solution of the present invention, Figure 8-11 As shown, the two arc-shaped sealing pads 11 are respectively a first soft rubber pad 12 and a second soft rubber pad 13. The first soft rubber pad 12 is fixedly connected to the inner wall of one of the straight tubes 101, and the second soft rubber pad 13 is spirally slidably connected in the two straight tubes 101 through the arc-shaped portion 14. The sliding stroke between the first soft rubber pad 12 and the second soft rubber pad 13 has a completely overlapping superimposed state and a staggered misaligned state. One end of the arc-shaped portion 14 is fixedly connected to a first abutment block 15, and at the same time, one of the rotating portions 401 is fixedly connected to a second abutment block 16. Based on this, the inner walls of the two straight tubes 101 are provided with a plurality of The arc portion 14 is fixedly connected with a moving block 18 located in the spiral groove 17, and when the two straight tubes 101 are aligned, the two spiral grooves 17 are connected. In the preferred state, the number of turns of the two spiral grooves 17 is a quarter of a turn; so far, when the two rotating parts 401 rotate the last semicircle, the first abutment block 15 and the second abutment block 16 abut against each other to drive the arc portion 14 to rotate spirally relative to the two half-tube sleeves 1, so that the first soft rubber pad 12 and the second soft rubber pad 13 move from the overlapping state to the misaligned state, so that the second soft rubber pad 13 will follow the arc portion 14 to spirally approach the first soft rubber pad 12; based on Fig.11As shown, in the preferred state, the circumference of the second soft rubber pad 13 is longer than that of the first soft rubber pad 12, so that the part of the second soft rubber pad 13 that is larger than the first soft rubber pad 12 in the staggered state will abut against the first soft rubber pad 12, thereby improving the sealing effect of the cable between the first soft rubber pad 12 and the second soft rubber pad. There is friction damping between the spiral groove 17 and the moving block 18, which is used to prevent the arc portion 14 from separating from the spiral groove 17 when the two half-tube sleeves 1 are separated. The other end of the arc portion 14 has a wedge-shaped surface, so that the arc portion 14 can better lift the cable hanging at a certain curvature at the port during the spiral rotation.

[0032] Specifically, when the first soft rubber pad 12 and the second soft rubber pad 13 are in an overlapping state, the cable can be directly transported into the cable duct from the cavity between the half-pipe sleeves 1 under the overlap, and the first soft rubber pad 12 and the second soft rubber pad 13 will not interfere with the cable. The arc portion 14 can not only lift the cable and squeeze the first soft rubber pad 12 during the spiral rotation, but also drive the second soft rubber pad 13 to spirally approach and abut the first soft rubber pad 12, thereby ensuring that the first soft rubber pad 12 and the second soft rubber pad 13 under the misalignment have a misalignment sealing effect on the cable.

[0033] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A waterproof plugging structure for cable holes in underground power pipe wells, characterized in that: include: Two half-tube sleeves capable of matching, each half-tube sleeve comprising a connected straight tube and a frustum tube; A first blocking unit, comprising a plurality of first blocking blocks distributed in a circumferential array, each of the first blocking blocks being slidably connected to the truncated cone tube; The second blocking unit comprises a plurality of first blocking blocks distributed in a circumferential array, each second blocking block being slidably connected to the truncated cone tube; Each first blocking block and each second blocking block located at the narrow end of the truncated cone tube are in an alternating staggered abutment state, and each first blocking block and each second blocking block located at the wide end of the truncated cone tube are in an alternating butt joint state to form a circular sealing state; The transmission mechanism is used for driving each first blocking block and each second blocking block to slide from the narrow end of the truncated cone tube to the wide end of the truncated cone tube.

2. The waterproof plugging structure for underground power pipe well cable holes according to claim 1, characterized in that: The two frustum tubes are provided with first guide grooves corresponding to the first blocking blocks, the first guide grooves include a connected inclined section and a horizontal section, and the first blocking block is fixedly connected with a first slider located in the first guide groove; in the process of each first blocking block moving from the oblique lower end of the corresponding inclined section to the junction of the inclined section and the horizontal section, it can push each second blocking block to switch from abutting state to a sealing state, and at the same time make the expanded diameter of each first blocking block the same as the expanded diameter of each first blocking block in the sealing state, and in the process of each first blocking block sliding along the corresponding horizontal section, each first blocking block is respectively docked and inserted into the distance between two adjacent first blocking blocks, so that a circular sealing state is formed between the first blocking block and each first blocking block.

3. The waterproof plugging structure for cable holes in underground power pipe wells according to claim 2 is characterized in that: The truncated cone tube is provided with second guide grooves corresponding to each second blocking block along the busbar direction, and each second blocking block is fixedly connected with a second slider located in the corresponding second guide groove. Each second blocking block is pushed by each first blocking block and slides along the oblique lower end to the oblique upper end of the corresponding second guide groove, so that the abutment state between each second blocking block and each second blocking block is switched to a sealing state.

4. The waterproof plugging structure for cable holes in underground power pipe wells according to claim 1, characterized in that: The transmission mechanism includes transmission components corresponding to the two half-pipe sleeves, and each transmission component includes: A rotating part, which is threadedly connected to a corresponding straight pipe; A sliding part is slidably connected to the outer wall of the straight tube along the axial direction of the half-tube sleeve, and the sliding part is rotationally connected to the rotating part; A plurality of connecting rods, one end of which is rotatably connected to the corresponding first blocking block, and the other end of which is slidably and rotatably connected to the sliding part; A plurality of telescopic rods have one end rotatably connected to the corresponding second blocking block and the other end rotatably connected to the sliding part.

5. The waterproof plugging structure for cable holes in underground electric power pipe wells according to claim 1, characterized in that: One of the half-tube sleeves is fixedly connected with a plurality of positioning posts, and the other half-tube sleeve is fixedly connected with positioning sockets corresponding to the positioning posts one by one.

6. The waterproof plugging structure for cable holes in underground electric power pipe wells according to claim 4, characterized in that: Each of the sliding parts is provided with a semi-annular groove, and the two half-tube sleeves are matched to make the two semi-annular grooves dock to form an annular groove. Each rotating part is fixedly connected with a plurality of straight rods, and one end of each straight rod away from the rotating part is respectively located in the corresponding semi-annular groove.

7. The waterproof plugging structure for cable holes in underground electric power pipe wells according to claim 1, characterized in that: Arc-shaped sealing pads are fixedly connected to the inner walls of the two straight pipe outer ports.

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