Plugging joint for supporting and sealing cable protection pipe and plug sealing degree monitoring method

Abstract

The invention relates to the technical field of cable protection tubes, and discloses a plugging connector for cable protection tube supporting and sealing and a plug sealing degree monitoring method, and the plugging connector structurally comprises a cable protection tube, a sealing plug, an inner plug structure, an outer sealing structure and a supporting structure. The first push rod is in running fit with the triangular push rod, the second push rod and the third push rod, so that the second push rod and the third push rod can be driven to eject outwards at the same time to enable an external expansion plate to expand outwards, and two groups of sealing rings on the external expansion plate are in contact with the inner wall of the cable protection pipe to seal the interior of the cable protection pipe; the inner plug structure can be suitable for cable protection pipes with different diameter specifications, the utilization rate is improved, and the cost is reduced.

Description

Technical Field

[0001] The invention belongs to the field of cable protection tubes, and in particular relates to a sealing joint for supporting and sealing the cable protection tube and a method for monitoring the sealing degree of the plug. Background Art

[0002] Cable is a device for transmitting electrical energy or signals, usually composed of several or several groups of wires. Cables include power cables, control cables, high-temperature cables, signal cables, fire-resistant cables, marine cables, aluminum alloy cables, etc. They are all composed of single or multiple strands of wire and an insulation layer, used to connect circuits, electrical appliances, etc. When the cable comes out of the ground, a cable protection tube is installed to protect the cable, and the port of the cable protection tube is sealed. However, in the existing technology, when sealing the cable protection tube, the sealing head is mostly selected according to the inner diameter of the tube to be sealed, which is relatively cumbersome to use. Cable protection tubes of different diameters require rotating plugs of different sizes, which is not only expensive but also has poor sealing performance on the tube body. This application proposes a sealing joint for cable protection tube support sealing and a method for monitoring the sealing degree of the plug to improve the above-mentioned defects. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a cable conduit support sealing plugging joint and a plug sealing monitoring method that can be applied to cable conduits of different diameters for sealing.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: A sealing joint for supporting and sealing a cable protective tube and a method for monitoring the sealing degree of the plug, the structure of which includes a cable protective tube, a sealing plug, a button and a limit block. Sealing plugs are installed at both ends of the cable protective tube. The sealing plugs can seal the cable protective tube and protect the cables inside. A button and a limit block are installed at one end of the sealing plug.

[0005] In a specific feasible implementation scheme, the sealing plug includes a base, an inner plug structure, an outer sealing structure and a supporting structure. The inner plug structure, the outer sealing structure and the supporting structure are installed on the base in sequence from the inside to the outside. The bottom of the outer sealing structure is built into the interior of the base, and the supporting structure is installed on the outer sealing structure with a clearance fit.

[0006] In a specific feasible implementation scheme, the internal plug structure includes a mounting seat, a telescopic frame, an outward expansion plate, a connecting rod mechanism, an electric push rod, a sealing ring and a blocking plate. The outer array of the mounting seat has several telescopic frames, and the telescopic rods of several of the telescopic frames are fixed with outward expansion plates. The upper and lower ends of several of the outward expansion plates are connected to the connecting rod mechanism. The two connecting rod mechanisms are symmetrically arranged. The connecting rod mechanism is connected to the central main shaft of the mounting seat and rotates together. An electric push rod electrically connected to the button is fixed on the main shaft end face of the mounting seat. The telescopic rod of the electric push rod is connected to the connecting rod mechanism. Two sealing rings are installed on the outer walls of several of the outward expansion plates, and a blocking plate is fixed to the bottom of the mounting seat.

[0007] In a specific feasible implementation scheme, the outward expansion plate includes a clamping column, an elastic cover and a telescopic column. The bottom of the outward expansion plate is fixed with a clamping column, and the bottom of the inner wall of several outward expansion plates is fixed with an elastic cover. The elastic cover is an elastic waterproof fabric. A telescopic column is fixed between each adjacent two outward expansion plates, and both ends of the telescopic column are connected to the outward expansion plate.

[0008] In a specific possible implementation manner, a plurality of slide grooves are arranged in an array on one side of the blocking plate, and a plurality of the slide grooves are slidably engaged with the clamping columns.

[0009] In a specific feasible implementation scheme, the connecting rod mechanism includes a first push rod, a triangular push rod, a second push rod and a third push rod. The first push rod is fixed to the telescopic rod of the electric push rod. One end of the first push rod is rotatably engaged with the outward expansion plate, and the other end of the first push rod is rotatably engaged with one end of the triangular push rod. The second end angle of the triangular push rod is rotatably engaged with the second push rod, and the other end of the second push rod is rotatably engaged with the outward expansion plate. The third end angle of the triangular push rod is rotatably engaged with the third push rod, and the other end of the third push rod is rotatably engaged with the outward expansion plate.

[0010] In a specific feasible implementation plan, the external sealing structure includes a main frame, a knob, a clamping block, a spiral frame, a limiting groove, a clamping block and a rubber sealing cover. The spiral frame is rotatably engaged at the center of the main frame, the central axis of the spiral frame passes through the base and is fixedly connected to the knob, the clamping block is rotatably engaged on the knob, four limiting grooves are arrayed on the main frame, and clamping blocks are slidably engaged on several of the limiting grooves. The bottom of the clamping block is movably engaged with the spiral frame, and rubber sealing covers are fixed on the inner side walls of several of the clamping blocks.

[0011] In a specific possible implementation scheme, the clamping block can be engaged with a plurality of groups of limiting blocks provided on one side of the base, and the limiting blocks can limit the rotation of the knob.

[0012] In a specific possible implementation scheme, the spiral groove provided on the spiral frame is a gradually contracting structure. When the knob drives the spiral frame to rotate, the spiral frame drives a plurality of clamping blocks that movably cooperate with the spiral frame to move.

[0013] In a specific feasible implementation scheme, the support structure includes an outer cover, a rotating shaft, a pressure plate, a rubber column, a lever, a mounting groove, a chamfer, a fixed groove and an opening. The outer cover is provided with a plurality of openings in an array, the bottoms of several of the openings are provided with rotating shafts, and pressure plates are rotatably fitted on several of the rotating shafts. Rubber columns are connected to both sides of the pressure plates, and a lever is fixed to the side of the rubber column close to the outside of the outer cover. The rubber column and the lever are both built into the mounting groove and can slide in the mounting groove. The mounting groove is provided on the outer cover, and a chamfer is provided at the end of the mounting groove close to the opening. A fixed groove is provided at one end of the mounting groove.

[0014] In a specific possible implementation scheme, the diameter of the fixing groove is slightly smaller than the diameter of the shifting rod, so that the shifting rod can be embedded and fixed.

[0015] According to the technical solution proposed above, the cable protection tube support sealing plugging joint and the plug sealing monitoring method of the present invention have the following beneficial effects: (1) The present invention adds an inner plug structure to the sealing plug, and uses an electric push rod to drive the first push rod to rotate and push it outward. The first push rod is rotated and coordinated with the triangular push rod, the second push rod and the third push rod, which can drive the second push rod and the third push rod to push outward at the same time to expand the outer expansion plate outward. With the help of the two sets of sealing rings on the outer expansion plate and the inner wall of the cable protective tube, the interior of the cable protective tube is sealed, so that the inner plug structure can be applied to cable protective tubes of different diameters, thereby improving utilization and reducing costs.

[0016] (2) The present invention installs an elastic cover at the bottom of the outer expansion plate. With the help of the expansion of the outer expansion plate, the connected elastic cover is stretched outward together, and cooperates with the sealing ring and the blocking plate to seal the inside of the cable protection tube, thereby improving the sealing efficiency and sealing effect of the cable protection tube.

[0017] (3) The present invention drives the spiral frame to rotate by turning the knob, and the spiral frame drives a number of clamping blocks that cooperate with it to slide back and forth under the limiting action of the limiting groove, driving the rubber sealing cover connected to it to adjust to be able to wrap and seal the outside of the cable protective tube, which can prevent the entry of external air and moisture, and form an inside-outside cooperation with the internal plug structure, thereby increasing the sealing effect of the cable protective tube and being applicable to cable protective tubes of different diameters.

[0018] (4) The present invention provides a support structure on the outside of the outer sealing structure, and uses a number of pressure plates on the support structure to press down and contact and hold the rubber sealing cover. As the pressure plates move, the rubber columns and the lever connected on both sides will slide together in the installation groove, and will stop after the lever is engaged with the fixed groove. At this time, the pressure plates will contact and hold the rubber sealing cover, which can increase the sealing performance of the rubber sealing cover, making it less likely for the rubber sealing cover to loosen and cause moisture and air to enter the cable protection tube, thereby improving the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings: Figure 1 Schematic diagram of the structure of the sealing joint for cable protection tube support sealing and the method for monitoring the sealing degree of the plug in the embodiment of the present application; Figure 2 This is a schematic structural diagram of a sealing plug in an embodiment of the present application; Figure 3 This is an exploded schematic diagram of the sealing plug in the embodiment of the present application; Figure 4 This is a structural diagram of the inner plug structure in an embodiment of the present application; Figure 5 This is a structural diagram of the inner and outer expansion plates in the embodiment of the present application; Figure 6 This is a structural diagram of the connecting rod mechanism in the embodiment of the present application; Figure 7 This is an exploded schematic diagram of the inner plug structure in the embodiment of the present application; Figure 8 This is a schematic structural diagram of the inner and outer sealing structures in an embodiment of the present application; Figure 9 This is a schematic structural diagram of the rubber sealing cover in an embodiment of the present application; Figure 10 This is a schematic structural diagram of the support structure in an embodiment of the present application; Figure 11 Schematic diagram of the installation of the sealing plug and the cable protection tube in the embodiment of the present application.

[0020] In the figure: cable protection tube 1, sealing plug 2, button 3, limit block 4, base 21, inner plug structure 22, outer sealing structure 23, support structure 24, mounting seat 221, telescopic frame 222, outer expansion plate 223, connecting rod mechanism 224, electric push rod 225, sealing ring 226, plugging plate 227, clamping column 11, elastic cover 13, telescopic column 14, slide groove 12, first push rod 31. Triangular push rod 32, second push rod 33, third push rod 34, main frame 231, knob 232, clamping block 233, spiral frame 234, limiting slot 235, clamping block 236, rubber sealing cover 237, outer cover 241, rotating shaft 242, pressure plate 243, rubber column 244, lever 245, mounting slot 246, chamfer 247, fixing slot 248, opening 249. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] Example 1: Please refer to Figure 1-Figure 7 , the specific embodiments of the present invention are as follows: A sealing joint for supporting and sealing a cable protective tube and a method for monitoring the sealing degree of the plug include a cable protective tube 1, a sealing plug 2, a button 3 and a limit block 4. Sealing plugs 2 are installed at both ends of the cable protective tube 1. The sealing plugs 2 can seal the cable protective tube 1 and protect the cables inside. A button 3 and a limit block 4 are installed at one end of the sealing plug 2.

[0023] See also Figure 2-Figure 3 The sealing plug 2 includes a base 21, an inner plug structure 22, an outer sealing structure 23 and a supporting structure 24. The inner plug structure 22, the outer sealing structure 23 and the supporting structure 24 are installed on the base 21 from the inside to the outside. The bottom of the outer sealing structure 23 is built into the inside of the base 21. The supporting structure 24 is installed on the outer sealing structure 23 with a clearance fit. The inner plug structure 22 can seal the internal channel of the cable protective tube 1, and the outer sealing structure 23 can seal the outer wall of the cable protective tube 1.

[0024] See also Figure 4The inner plug structure 22 includes a mounting seat 221, a telescopic frame 222, an outward expansion plate 223, a connecting rod mechanism 224, an electric push rod 225, a sealing ring 226 and a blocking plate 227. The outer array of the mounting seat 221 has several telescopic frames 222, and the outward expansion plates 223 are fixed on the telescopic rods of several telescopic frames 222. The upper and lower ends of several outward expansion plates 223 are connected to the connecting rod mechanism 224. The two connecting rod mechanisms 224 are symmetrically arranged, and can drive the outward expansion plates 223 to expand and stretch outward through the connecting rod mechanism 224. The connecting rod mechanism 224 is connected to the central spindle of the mounting seat 221 and rotates together. An electric push rod 225 electrically connected to the button 3 is fixed on the spindle end face of the mounting seat 221. The telescopic rod of the electric push rod 225 is connected to the connecting rod mechanism 224. Two sealing rings 226 are installed on the outer walls of several outward expansion plates 223, and a blocking plate 227 is fixed at the bottom of the mounting seat 221.

[0025] See also Figure 4-Figure 7 The telescopic frame 222 is a multi-telescopic structure. When 223 expands outward, the telescopic column inside the telescopic frame 222 will be pulled outward together, which can increase the stability of the movement of the outward expansion plate 223.

[0026] See also Figure 4-Figure 5 The outward expansion plate 223 includes a card column 11, an elastic cover 13 and a telescopic column 14. The card column 11 is fixed to the bottom of the outward expansion plate, and the elastic cover 13 is fixed to the bottom of the inner wall of several outward expansion plates 223. The elastic cover 13 is an elastic waterproof fabric that can expand and contract with the expansion of the outward expansion plate 223. A telescopic column 14 is fixed between each adjacent outward expansion plate 223. Both ends of the telescopic column 14 are connected to the outward expansion plate 223. When the outward expansion plate 223 expands outward, it can be stretched to increase the stability and synchronization of the connection between each adjacent outward expansion plate 223.

[0027] See also Figure 5 There are several slide grooves 12 in an array on one side of the blocking plate 227, and the several slide grooves 12 are slidably engaged with the card column 11. When the outward expansion plate 223 is expanding and stretching, the card column 11 at the bottom will slide in the slide groove 12, which plays a role in limiting and stabilizing the movement of the outward expansion plate 223.

[0028] See also Figure 5-Figure 6The connecting rod mechanism 224 includes a first push rod 31, a triangular push rod 32, a second push rod 33 and a third push rod 34. The first push rod 31 is fixed to the telescopic rod of the electric push rod 225, and can be pushed out by the electric push rod 225 to drive the first push rod 31 to move outward. One end of the first push rod 31 is rotatably engaged with the outward expansion plate 223, and the other end of the first push rod 31 is rotatably engaged with one end of the triangular push rod 32. The second end angle of the triangular push rod 32 is rotatably engaged with the second push rod 33, and the other end of the second push rod 33 is rotatably engaged with the outward expansion plate 223. The third end angle of the triangular push rod 32 is rotatably engaged with the third push rod 34, and the other end of the third push rod 34 is rotatably engaged with the outward expansion plate 223.

[0029] See also Figure 4-Figure 7 The electric push rod 225 is driven by the button 3 to operate, and the electric push rod 225 drives the first push rod 31 connected thereto to rotate on the main shaft of the mounting seat 221 and push outward. With the rotational cooperation between the first push rod 31 and the triangular push rod 32, the second push rod 33 and the third push rod 34, when the first push rod 31 is pushed outward, the second push rod 33 and the third push rod 34 can be pushed outward at the same time, driving the outer expansion plate 223 connected thereto to expand outward synchronously, and driving the sealing ring 226 to retract outward together and contact the inner wall of the cable protective tube 1, which can be suitable for sealing cable protective tubes 1 with different diameters.

[0030] Example 2: Please refer to Figures 8-11 , the specific embodiments of the present invention are as follows: See also Figure 8-Figure 9 The outer sealing structure 23 includes a main frame 231, a knob 232, a block 233, a spiral frame 234, a limiting groove 235, a clamping block 236 and a rubber sealing cover 237. The spiral frame 234 is rotatably engaged at the center of the main frame 231. The central axis of the spiral frame 234 passes through the base 21 and is fixedly connected to the knob 232. The spiral frame 234 can be driven to rotate by rotating the knob 232. The knob 232 is rotatably engaged with the block 233. Four limiting grooves 235 are arrayed on the main frame 231, and clamping blocks 236 are slidably engaged on several limiting grooves 235. The bottom of the clamping block 236 is movably engaged with the spiral frame 234, and rubber sealing covers 237 are fixed on the inner side walls of several clamping blocks 236.

[0031] See also Figure 8-Figure 9 The block 233 can be engaged with several groups of limit blocks 4 provided on one side of the base 21. The limit blocks 4 can limit the rotation of the knob 232. When the knob 232 is rotated to the desired position, the engagement between the block 233 and the limit blocks 4 can prevent the knob 232 from rotating reversely.

[0032] See also Figure 8-Figure 9The spiral groove on the spiral frame 234 is a gradually contracting structure. When the knob 232 drives the spiral frame 234 to rotate, the spiral frame 234 will drive the several clamping blocks 236 that cooperate with it to move. Under the limiting action of the limiting groove 235, the clamping blocks 236 will slide back and forth on the limiting groove 235, thereby driving the rubber sealing cover 237 to adjust and wrap and seal the outer wall of the cable protection tube 1 with different diameters.

[0033] See also Figure 8-Figure 9 The rubber sealing cover 237 has elasticity and pressure resistance due to the characteristics of rubber material, and can be adjusted in size as the clamping block 236 moves, so that cable protection tubes 1 of different diameters can be sealed and waterproofed.

[0034] See also Figure 10 The support structure 24 includes an outer cover 241, a rotating shaft 242, a pressure plate 243, a rubber column 244, a lever 245, a mounting groove 246, a chamfer 247, a fixing groove 248 and an opening 249. A plurality of openings 249 are arranged in an array on the outer cover 241. The bottoms of the plurality of openings 249 are all installed with rotating shafts 242. A pressure plate 243 is rotatably fitted on the plurality of rotating shafts 242. Both sides of the pressure plate 243 are connected to rubber columns 244. A lever 245 is fixed to the side of the rubber column 244 close to the outside of the outer cover 241. The rubber column 244 and the lever 245 are both built into the mounting groove 246 and can slide in the mounting groove 246. The mounting groove 246 is opened on the outer cover 241. A chamfer 247 is opened at the end of the mounting groove 246 close to the opening 249, and a fixing groove 248 is provided at one end of the mounting groove 246.

[0035] See also Figure 10 The diameter of the fixing groove 248 is slightly smaller than the diameter of the shifting rod 245 , so that the shifting rod 245 can be embedded and fixed, so that the positions of the rubber column 244 and the pressure plate 243 are fixed.

[0036] See also Figure 10 The setting of the chamfer 247 can facilitate the rubber column 244 to slide in the installation groove 246 when the pressure plate 243 rotates inward to contact the rubber sealing cover 237.

[0037] See also Figure 10 When the pressure plate 243 rotates inward until it contacts the rubber sealing cover 237 and fixes the rubber sealing cover 237, the movement of the pressure plate 243 will drive the rubber columns 244 and the lever 245 connected to it on both sides to slide in the installation groove 246 and stop until the lever 245 engages with the fixing groove 248. At this time, the pressure plate 243 will contact the rubber sealing cover 237 and support it, which can increase the sealing performance of the rubber sealing cover 237.

[0038] Based on the above embodiment, a method for monitoring the sealing degree of a plugging joint for a cable protection tube support seal is described as follows: S1, when the cable protective tube 1 is in use, the sealing plug 2 is installed on both ends of the cable protective tube 1 to support and seal the cable protective tube 1. When the sealing plug 2 is installed, the button 3 is used to control the operation of the electric push rod 225, which drives the connected first push rod 31 to rotate on the main shaft of the mounting seat 221 and push it outward; S2, through the rotational cooperation between the first push rod 31 and the triangular push rod 32, the second push rod 33 and the third push rod 34, when the first push rod 31 is pushed outward, the second push rod 33 and the third push rod 34 that cooperate with it are pushed outward at the same time; S3, as the second push rod 33 and the third push rod 34 move, the connected external expansion plates 223 are driven to expand outward synchronously, and the two sets of sealing rings 226 on the external expansion plates 223 are driven to stretch outward together until they come into contact with the inner wall of the cable protective tube 1 and then stop. At this time, as the external expansion plates 223 expand, the elastic cover 13 connected thereto is driven to stretch outward by the external expansion plates 223, and cooperate with the sealing ring 226 and the blocking plate 227 to seal the interior of the cable protective tube 1; S4, then rotating the knob 232 drives the spiral frame 234 to rotate, and the spiral frame 234 drives the several clamping blocks 236 that movably cooperate with it to move. Under the limiting action of the limiting groove 235, the clamping blocks 236 slide back and forth on the limiting groove 235, and drive the rubber sealing cover 237 connected thereto to adjust to be able to wrap and seal the outside of the cable protection tube 1 to prevent external air and moisture from entering. Then, the clamping block 233 is engaged with the several groups of limiting blocks 4 on one side of the base 21, so that the knob 232 will not be reversed; S5, and press down the plurality of pressure plates 243 installed on the support structure 24, so that the pressure plates 243 contact and abut the rubber sealing cover 237. At this time, as the pressure plates 243 move, the rubber columns 244 and the levers 245 connected on both sides slide together in the installation grooves 246, and stop until the levers 245 engage with the fixing grooves 248. At this time, the pressure plates 243 contact and abut the rubber sealing cover 237, which can improve the sealing performance of the rubber sealing cover 237. S6, then placing the sealed cable protective tube 1 inside a hydraulic pressure test device through a hydraulic pressure test method, and filling the test device with water until the water level is high enough to cover the cable protective tube 1; S7, then apply a certain pressure through the water pressure test device to make the water medium fill the entire test piece. During the test, observe whether there is any leakage in the sealing plugs at both ends of the cable protective tube 1. If water bubbles emerge around the sealing plug 2 and at both ends of the cable protective tube 1, it means that the seal is incomplete. If no water vapor emerges, it means that the seal of the sealing plug 2 is complete.

[0039] In the description of the present invention, it should be understood that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] The control method of the present invention is to control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field, so the present invention will no longer explain the control method and circuit connection in detail.

[0041] The above is only a specific implementation method of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed in this application, which should be covered by the protection scope of the present application.

Claims

1. A sealing joint for supporting and sealing a cable protection tube, comprising a cable protection tube (1), sealing plugs (2) installed at both ends of the cable protection tube (1), a button (3) and a limit block (4) provided at one end of the sealing plug (2); characterized in that: The sealing plug (2) comprises a base (21), an inner plug structure (22) mounted on the base (21) and arranged from the inside to the outside, an outer sealing structure (23) and a supporting structure (24), wherein the bottom of the outer sealing structure (23) is built into the interior of the base (21), and the supporting structure (24) is mounted on the outer sealing structure (23) and is clearance-fitted therewith; The inner plug structure (22) includes a mounting seat (221), a plurality of telescopic frames (222) arranged in an array outside the mounting seat (221), an outward expansion plate (223) mounted on the telescopic rods of the plurality of telescopic frames (222), a connecting rod mechanism (224) provided at the upper and lower ends of the outward expansion plate (223), an electric push rod (225) located on the main shaft end surface of the mounting seat (221), a sealing ring (226) provided on the outer walls of the plurality of outward expansion plates (223), and a plugging plate (227) fixed to the bottom of the mounting seat (221); The connecting rod mechanism (224) includes a first push rod (31), a triangular push rod (32) rotatably engaged with one end of the first push rod (31), a second push rod (33) rotatably engaged with the second end angle of the triangular push rod (32), and a third push rod (34) rotatably engaged with the third end angle of the triangular push rod (32), the other end of the third push rod (34) being rotatably engaged with the outer expansion plate (223); The outer sealing structure (23) includes a main frame (231), a spiral frame (234) rotatably engaged at the center of the main frame (231), a knob (232) located at the central axis of the spiral frame (234), a clamping block (233) for rotatably engaging with the knob (232), four limiting grooves (235) arrayed on the main frame (231), a clamping block (236) for slidably engaging with a plurality of the limiting grooves (235), and a rubber sealing cover (237) fixed on the inner side wall of the clamping block (236); The support structure (24) includes an outer cover (241), a plurality of openings (249) arrayed on the outer cover (241), a rotating shaft (242) located at the bottom of the plurality of openings (249), a pressure plate (243) for rotating with the rotating shaft (242), rubber columns (244) located on both sides of the pressure plate (243), and a lever (245) fixed to one side of the rubber column (244). The rubber column (244) and the lever (245) are both built into the interior of the mounting groove (246). The mounting groove (246) is provided on the outer cover (241). A chamfer (247) is provided at the end of the mounting groove (246) near the opening (249). A fixing groove (248) is provided at one end of the mounting groove (246).

2. The cable protection tube support sealing plugging joint according to claim 1, characterized in that: The outward expansion plate (223) comprises a clamping column (11), an elastic cover (13) and a telescopic column (14); the clamping column (11) is fixed to the bottom of the outward expansion plate; the elastic cover (13) is fixed to the bottom of the inner wall of a plurality of the outward expansion plates (223); a telescopic column (14) is fixed between each two adjacent outward expansion plates (223); and both ends of the telescopic column (14) are connected to the outward expansion plate (223).

3. The cable protection tube support sealing plugging joint according to claim 2, characterized in that: A plurality of slide grooves (12) are arranged in an array on one side of the blocking plate (227), and the plurality of slide grooves (12) are slidably engaged with the clamping columns (11).

4. The cable protection tube support sealing plugging joint according to claim 3, characterized in that: The clamping block (233) can be engaged with a plurality of groups of limiting blocks (4) provided on one side of the base (21), and the limiting blocks (4) can limit the rotation of the knob (232).

5. The cable protection tube support sealing plugging joint according to claim 4, characterized in that: The spiral groove provided on the spiral frame (234) is a gradually contracting structure.

6. The cable protection tube support sealing plugging joint according to claim 5, characterized in that: The diameter of the fixing groove (248) is slightly smaller than the diameter of the shifting rod (245), and the shifting rod (245) can be embedded and fixed, so that the positions of the rubber column (244) and the pressure plate (243) are fixed.

7. A plugging joint for sealing a cable conduit support and a method for monitoring the sealing degree of the plugging joint, wherein the plugging joint for sealing a cable conduit support according to claim 6 is used, and the method for monitoring the sealing degree of the plugging joint is as follows: S1, when the cable protection tube (1) is in use, the sealing plug (2) is installed on both ends of the cable protection tube (1), so that the cable protection tube (1) can be supported and sealed. When the sealing plug (2) is installed, the electric push rod (225) is controlled to operate by the button (3), and the electric push rod (225) drives the connected first push rod (31) to rotate on the main shaft of the mounting seat (221) and push it outward; S2, through the rotational cooperation between the first push rod (31) and the triangular push rod (32), the second push rod (33) and the third push rod (34), when the first push rod (31) is pushed outward, the second push rod (33) and the third push rod (34) that cooperate with it are simultaneously pushed outward; S3, as the second push rod (33) and the third push rod (34) move, the connected plurality of outer expansion plates (223) will be driven to expand outward synchronously, and the two sets of sealing rings (226) on the outer expansion plates (223) will be driven to stretch outward together until they come into contact with the inner wall of the cable protection tube (1) and then stop. At this time, as the plurality of outer expansion plates (223) expand, the elastic cover (13) connected thereto will be driven to stretch outward together under the drive of the outer expansion plates (223), and cooperate with the sealing ring (226) and the blocking plate (227) to seal the inside of the cable protection tube (1); S4, then rotating the knob (232) to drive the spiral frame (234) to rotate, and the spiral frame (234) will drive the plurality of clamping blocks (236) that are movably matched with it to move, and under the limiting action of the limiting groove (235), the clamping block (236) slides back and forth on the limiting groove (235), and drives the rubber sealing cover (237) connected thereto to be adjusted to be able to wrap and seal the outside of the cable protection tube (1), so as to prevent the outside air and moisture from entering, and then bend the clamping block (233) to engage with the plurality of groups of limiting blocks (4) on one side of the base (21), so as to prevent the knob (232) from being reversed; S5, and press down a plurality of pressure plates (243) installed on the support structure (24), so that the pressure plates (243) contact and resist the rubber sealing cover (237), and at this time, as the pressure plates (243) move, the rubber columns (244) and the shifting rod (245) connected on both sides will be driven to slide together in the installation groove (246), and stop after the shifting rod (245) is engaged with the fixing groove (248), and at this time, the pressure plates (243) will contact and resist the rubber sealing cover (237), thereby increasing the sealing performance of the rubber sealing cover (237); S6, then placing the sealed cable protection tube (1) inside a water pressure test device through a water pressure test method, and filling the test device with water medium until the water level is high enough to cover the cable protection tube (1); S7, and then a certain pressure is applied through the water pressure test device to make the water medium fill the entire test piece. During the test, observe whether the sealing plugs at both ends of the cable protection tube (1) are leaking. When water bubbles emerge around the sealing plug (2) and at both ends of the cable protection tube (1), it means that the seal is incomplete. When no water vapor emerges, it means that the seal of the sealing plug (2) is complete.

Images