Power pipeline plugging device

Abstract

The invention discloses an electric power pipeline plugging device, and belongs to the field of electric power pipeline plugging, the electric power pipeline plugging device comprises a sealing ring, an inner clamping plate arranged on one side of the sealing ring and an outer clamping plate arranged on the other side of the sealing ring, the outer ring of the sealing ring is provided with an outer bulge, the inner ring of the sealing ring is provided with an inner bulge, and one side of the inner clamping plate is provided with a plurality of inner wall jacking mechanisms; the inner wall jacking mechanism comprises a fixed wedge block, an unthreaded hole is formed in the fixed wedge block, a jacking block is slidably connected to one side of the fixed wedge block, an inclined plane matched with the fixed wedge block is arranged on one side of the jacking block, a through kidney-shaped groove is formed in the jacking block, and a screw rod is arranged in the kidney-shaped groove; a plurality of second through holes are formed in the outer clamping plate, and one end of the screw rod is in threaded connection with a fastening structure. The inner wall jacking mechanism is arranged on one side of the inner clamping plate, the sealing effect of the sealing device is guaranteed, meanwhile, displacement of the plugging device in the using process is avoided, and the stability of the plugging device is guaranteed.

Description

Technical Field

[0001] The invention belongs to the field of electric pipeline blocking, and in particular relates to an electric pipeline blocking device. Background Art

[0002] As an important part of urban infrastructure construction, power pipelines undertake the key task of transmitting electric energy. These pipelines are usually designed as simple hollow cylindrical structures to facilitate the laying and maintenance of cables. However, it is precisely this simple design that makes power pipelines easy to become passages for small animals such as rats and snakes to enter if they are not properly blocked. The intrusion of these foreign objects may not only bite the cables and cause power failures, but also cause safety hazards and affect the stable operation of the power system.

[0003] What is more serious is that during the rainy season, due to the loose sealing of some power pipelines, external substances such as rainwater and mud can easily penetrate into the pipelines. This will not only cause the pipeline interface to be contaminated, but also cause the cables to be immersed in the water. Over time, it will accelerate the aging of the cables, reduce their insulation performance, and increase the risk of power accidents. Especially in some low-lying or poorly drained areas, a large amount of water often accumulates in the power pipelines, which brings great inconvenience to the construction workers' later cleaning work, which is not only time-consuming and labor-intensive, but also increases maintenance costs.

[0004] In order to solve the above problems, fireproof mud, cement, sand and other materials are traditionally used to seal power pipelines. Although these sealing materials can prevent foreign matter and moisture from entering the pipeline to a certain extent, they have the defect of being non-removable. Once the power pipeline needs to be repaired or a new line is added, these sealing materials are often difficult to remove, which brings inconvenience to the construction and may even damage the cable or pipeline itself.

[0005] In order to solve the shortcomings of traditional plugging methods, a new type of power pipeline plugger has appeared on the market. This plugger uses a flexible seal as the core component. By placing it in the cable pipeline and using the bolts of the connector to force the flexible seal to deform, a tight annular sealing surface is formed between the pipeline and the cable. This design not only ensures the sealing of the plugging, but also facilitates disassembly.

[0006] However, although this plug has solved the shortcomings of traditional plugging methods to a certain extent, it still faces some challenges in practical application. Since the inner wall of the power pipeline is usually smooth and may be affected by external forces such as vibration and impact during use, the plug is prone to displacement. When the plug moves into the power pipeline, it will increase the difficulty of later disassembly; and when the plug moves to the outside of the power pipeline, it may detach from the pipeline, resulting in plugging failure. These problems not only affect the use effect of the plug, but also may bring potential risks to the safe operation of the power system. Summary of the invention

[0007] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a power pipeline plugging device that can not only ensure the plugging effect of the power pipeline, but also prevent the plugging device from shifting during use and is easy to disassemble, which is of great significance for improving the stability, flexibility and safety of the power system.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is:

[0009] A power pipeline plugging device comprises a sealing ring, an inner clamping plate arranged on one side of the sealing ring and an outer clamping plate arranged on the other side of the sealing ring, wherein the outer ring of the sealing ring is provided with an outer protrusion, and the inner ring of the sealing ring is provided with an inner protrusion. After the plugging device is plugged, the outer protrusion is tightly attached to the inner wall of the power pipeline, and the inner protrusion is tightly attached to the outer wall of the cable. The sealing ring is provided with a plurality of connecting holes; the inner clamping plate is arranged away from the pipe mouth of the power pipeline, a first inner hole is provided in the middle of the inner clamping plate, a plurality of first through holes are provided on the inner clamping plate, a plurality of inner wall tightening mechanisms are provided on one side of the inner clamping plate, and the inner wall tightening mechanisms are provided on the inner wall tightening mechanisms. The structure includes a fixed wedge block, which is provided with a light hole. A top block is slidably connected to one side of the fixed wedge block, and a slope matching the fixed wedge block is provided on one side of the top block. A through waist-shaped groove is provided on the top block, and a screw is provided in the waist-shaped groove; the outer splint is arranged near the pipe mouth of the power pipeline, and a second inner hole is provided in the middle of the outer splint, and the cable is placed in the first inner hole and the second inner hole. A plurality of second through holes are provided on the outer splint, and the screw passes through the waist-shaped groove, the light hole, the first through hole, the connecting hole and the second through hole in sequence, and one end of the screw is threadedly connected with a fastening structure.

[0010] Furthermore, at least two outer protrusions and inner protrusions are provided, and the plurality of outer protrusions and inner protrusions are sequentially connected to form a wave-shaped structure, so that the sealing ring can form a multi-stage seal when contacting with the power pipeline and the cable.

[0011] Furthermore, the sealing ring is a hollow structure, and an air nozzle is provided on one side of the sealing ring. An air nozzle hole for the air nozzle to pass through is provided on the outer clamping plate. After the sealing ring is pressed against the inner wall of the power pipeline and the outer wall of the cable, gas is injected into the sealing ring through the air nozzle so that the inside of the sealing ring has a certain pressure. A number of guide sleeves are provided inside the sealing ring, and both ends of the guide sleeves are connected to the connecting holes of the sealing ring for guiding the screw and sealing the connecting holes.

[0012] Furthermore, the guide sleeve is provided with a plurality of inwardly concave necks, and when a certain pressure of gas is rushed into the sealing ring, the inner necks are closely attached to the outer wall of the screw.

[0013] Furthermore, a limiting groove is provided on the fixed wedge block, and the top block is slidably installed inside the limiting groove.

[0014] Furthermore, the outer end surface of the top block is an arc-shaped structure, and a plurality of criss-cross anti-slip grooves are arranged on the outer end surface of the top block.

[0015] Furthermore, the fastening structure includes multiple gears, an internal screw hole is provided in the middle of the gear, the gear is threadedly connected to the screw, the outer ring of the outer clamp is provided with an outer ring plate, and the inner part of the outer ring plate is provided with an internal thread; the inner part of the outer ring plate is threadedly connected with a spiral coil, and an inner gear ring is provided on one side of the spiral coil, the inner gear ring is meshed with the gear, and the feed amount of the spiral coil rotating one circle on the outer ring plate is equal to the feed amount of the gear rotating n circles on the screw (n is the transmission ratio of the inner gear ring to the gear), and a number of handles are provided on the other side of the spiral coil.

[0016] Furthermore, a sleeve is provided on one side of the second inner hole of the outer clamping plate, and the cable is arranged inside the sleeve. The inner hole of the sleeve is a smooth through hole, and the thickness of the outer wall of the end of the sleeve away from the second inner hole is greater than the thickness of the end of the sleeve close to the second inner hole, so that the sleeve has a trumpet-shaped structure, and a plurality of slots are provided at one end of the sleeve, and a clamping nut is threadedly connected to the sleeve; a limit ring is provided on the sleeve.

[0017] Furthermore, it also includes a plunger for sealing a reserved power pipeline without a cable, the plunger includes a plunger body, a first thread arranged at one end of the plunger body and a second thread arranged at the other end of the plunger body, and a knob is provided at each end of the plunger body, the first thread is threadedly connected to the first inner hole of the inner clamping plate, and the second thread is threadedly connected to the second inner hole of the outer clamping plate.

[0018] Furthermore, the plunger body is a bare rod, or the plunger body is provided with a plurality of annular grooves corresponding to the positions and shapes of the inner protrusions.

[0019] The beneficial effects of the present invention are:

[0020] 1) The present invention provides an inner wall tightening mechanism on one side of the inner clamping plate, which not only ensures the sealing effect of the sealing device, but also avoids displacement of the sealing device during use, thereby ensuring the stability of the sealing device.

[0021] 2) The outer and inner protrusions are designed as a wave-shaped structure, so that the sealing ring can form multiple sealing points when it contacts the power pipeline and cable; each level of protrusion plays an independent sealing role. When one level fails due to wear or aging, the other levels of protrusions can still maintain the sealing effect, thereby greatly enhancing the reliability and durability of the plugging device; in addition, the outer and inner protrusions of the wave-shaped structure not only increase the contact area between the sealing ring and the power pipeline, but also make the contact surface more complex and changeable. The friction between the sealing ring and the power pipeline is significantly increased, effectively preventing the displacement or falling off of the plugging device due to external forces such as vibration and impact during use, and further ensuring the stability of the plugging device after installation.

[0022] 3) The sealing ring adopts a hollow structure. After the sealing ring is pressed against the inner wall of the power pipeline and the outer wall of the cable, a certain pressure of gas is injected into the sealing ring through the air nozzle. This ensures that even if the fastening structure becomes loose, the sealing ring will still be pressed against the power pipeline and cable, effectively preventing the sealing failure caused by the loosening of the fastening structure.

[0023] 4) A plurality of inwardly concave necks are arranged on the guide sleeve. When a certain pressure of gas is rushed into the sealing ring, the necks are closely attached to the outer wall of the screw, thereby ensuring the sealing effect between the sealing ring and the screw.

[0024] 5) The fastening structure includes multiple gears, which are threadedly connected to the screw rod. The outer ring plate is internally threadedly connected to a screw ring. An inner gear ring is provided on one side of the screw ring. The inner gear ring is engaged with the gear. When the screw ring is rotated, the inner gear ring drives the multiple gears to rotate synchronously, so that multiple positions on the sealing ring and multiple inner wall tightening mechanisms are subjected to the same tightening force at the same time, thereby realizing the synchronous tightening of the sealing ring and multiple inner wall tightening mechanisms, ensuring the stability and reliability of the sealing ring and the inner wall tightening mechanism in sealing the power pipeline, and improving the efficiency of power pipeline sealing.

[0025] 6) A shaft sleeve is provided on one side of the outer clamping plate. The shaft sleeve has a trumpet-shaped structure and a plurality of slots are provided on one end of the shaft sleeve. A clamping nut is threadedly connected to the shaft sleeve. When the clamping nut rotates toward the side away from the outer clamping plate, the clamping nut squeezes the large end of the shaft sleeve, causing the large end of the shaft sleeve to shrink inward, thereby clamping the shaft sleeve and the cable, realizing secondary clamping of the plugging device and further enhancing the stability of the installation of the plugging device.

[0026] 7) By setting the plunger, when no cable is passed through the power pipeline, the inner wall pressing mechanism presses the inner wall of the power pipeline, and after the sealing ring is pressed against the inner wall of the power pipeline, the plunger is connected to the inner clamping plate and the outer clamping plate, so that the inner protrusion of the sealing ring is pressed against the plunger body, thereby ensuring the effect of sealing the power pipeline without a cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The present invention is a diagram showing the use status of a power pipeline plugging device.

[0028] Figure 2 It is a structural schematic diagram of a power pipeline plugging device of the present invention.

[0029] Figure 3 It is a schematic diagram of the sealing ring structure.

[0030] Figure 4 is a cross-sectional view of the sealing ring.

[0031] Figure 5 It is a schematic diagram of the inner ring plate structure.

[0032] Figure 6 This is an exploded view of the fixed wedge, top block and screw.

[0033] Figure 7 It is a schematic diagram of the outer splint structure.

[0034] Figure 8 This is an exploded view of the outer plate, screw ring and clamping nut.

[0035] Fig. 9 It is a schematic diagram of the spiral structure.

[0036] Fig.10 It is a schematic diagram of the plunger structure.

[0037] In the figure, 1. power pipeline; 2. cable; 3. sealing ring; 31. outer protrusion; 32. inner protrusion; 33. guide sleeve; 34. inner neck; 35. connecting hole; 36. air nozzle; 4. inner clamping plate; 41. first inner hole; 42. fixed wedge block; 43. light hole; 44. limiting groove; 45. top block; 46. waist-shaped groove; 47. anti-slip pattern; 48. screw; 49. fastening structure; 5. outer clamping plate; 51. second through hole; 52. air nozzle hole; 53. outer ring plate; 54. shaft sleeve; 541. limiting retaining ring; 542. slot; 55. spiral ring; 551. inner gear ring; 552. handle; 56. clamping nut; 6. plunger; 61. first thread; 62. second thread; 63. plunger body; 64. knob. DETAILED DESCRIPTION

[0038] The following will be combined with the attached Figure 1-Figure 10, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating 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 do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] like Figure 1 , Figure 2 As shown, a power pipeline plugging device includes a sealing ring 3, an inner clamping plate 4 arranged on one side of the sealing ring 3, and an outer clamping plate 5 arranged on the other side of the sealing ring 3. Figure 4 As shown, the outer ring of the sealing ring 3 is provided with an outer protrusion 31, and the inner ring of the sealing ring 3 is provided with an inner protrusion 32. After the blocking device is blocked, the outer protrusion 31 is tightly attached to the inner wall of the power pipeline 1, and the inner protrusion 32 is tightly attached to the outer wall of the cable 2. The sealing ring 3 is provided with a plurality of connecting holes 35; the inner clamping plate 4 is arranged away from the pipe opening of the power pipeline, as shown in FIG. Figure 5 As shown, the middle of the inner clamping plate is provided with a first inner hole 41, the inner clamping plate 4 is provided with a plurality of first through holes, and one side of the inner clamping plate 4 is provided with a plurality of inner wall tightening mechanisms, such as Figure 6 As shown, the inner wall tightening mechanism includes a fixed wedge block 42, a light hole 43 is provided on the fixed wedge block 42, a top block 45 is slidably connected to one side of the fixed wedge block 42, a slope matched with the fixed wedge block 42 is provided on one side of the top block 45, a through waist-shaped groove 46 is provided on the top block 45, and a screw 48 is provided in the waist-shaped groove 46; the outer clamping plate 5 is arranged near the pipe mouth of the power pipeline, and a second inner hole is provided in the middle of the outer clamping plate 5, and the cable 2 is placed inside the first inner hole 41 and the second inner hole, as shown in FIG. Figure 7 , Figure 8 As shown, the outer clamping plate 5 is provided with a plurality of second through holes 51 , the screw rod 48 passes through the waist-shaped groove 46 , the light hole 43 , the first through hole, the connecting hole 35 and the second through hole 51 in sequence, and one end of the screw rod 48 is threadedly connected with a fastening structure 49 .

[0041] When the inner wall tightening mechanism tightens the screw 48, the top block 45 first extends outward under the guidance of the fixed wedge block 42 until it presses against the inner wall of the power pipeline, thereby ensuring the stability of the sealing device and avoiding displacement of the sealing device during use; in some embodiments, in order to ensure the smooth movement of the top block 45 on the fixed wedge block 42, a bull's eye bearing may be provided on the contact surface between the top block 45 and the fixed wedge block 42; as the inner wall tightening mechanism further tightens the screw 48, the sealing ring 3 is squeezed, the outer protrusion 31 deforms outward to press against the inner wall of the power pipeline, and the inner protrusion 32 deforms inward to press against the cable 2, thereby forming a tight annular sealing surface between the power pipeline and the cable 2, effectively preventing rainwater, mud and sand from penetrating into the interior of the power pipeline, and ensuring the sealing effect of the power pipeline; when the sealing device is disassembled, it is only necessary to loosen the fastening structure 49.

[0042] like Figure 4 As shown, there are at least two outer protrusions 31 and inner protrusions 32, and multiple outer protrusions 31 and inner protrusions 32 are connected in sequence to form a wavy structure, so that the sealing ring 3 can form a multi-level sealing point when it contacts the power pipeline 1 and the cable 2; each level of protrusions plays an independent sealing role, and when one level fails due to wear or aging, the other levels of protrusions can still maintain the sealing effect, thereby greatly enhancing the reliability and durability of the plugging device; in addition, the outer protrusions 31 and inner protrusions 32 of the wavy structure not only increase the contact area between the sealing ring 3 and the power pipeline, but also make the contact surface more complex and changeable. The friction between the sealing ring 3 and the power pipeline is significantly increased, effectively preventing the displacement or falling off of the plugging device due to external forces such as vibration and impact during use, and further ensuring the stability of the plugging device after installation.

[0043] like Figure 3 , Figure 4 As shown, the sealing ring 3 is a hollow structure, a gas nozzle 36 is provided on one side of the sealing ring 3, and a gas nozzle hole 52 for the gas nozzle 36 to pass through is provided on the outer clamping plate 5. After the sealing ring 3 is closely attached to the inner wall of the power pipeline and the outer wall of the cable 2, gas is injected into the sealing ring 3 through the gas nozzle 36, so that the inside of the sealing ring 3 has a certain pressure. A plurality of guide sleeves 33 are provided inside the sealing ring 3, and the two ends of the guide sleeves 33 are connected to the connection holes 35 of the sealing ring 3, which are used for guiding the screw 48 and sealing the connection holes 35. Since a certain pressure of gas is injected into the hollow sealing ring 3, even if the fastening structure 49 is loose, the sealing ring 3 will be closely attached to the power pipeline 1 and the cable 2, effectively preventing the sealing failure problem caused by the loosening of the fastening structure 49; in some embodiments, in order to ensure the stability of the sealing ring 3, the gas filled can be nitrogen to reduce the large deformation of the sealing ring 3 caused by thermal expansion and contraction.

[0044] like Figure 4As shown, the guide sleeve 33 is provided with a plurality of inwardly recessed necks 34 . When a certain pressure of gas is injected into the sealing ring 3 , the necks 34 are tightly attached to the outer wall of the screw 48 , thereby ensuring the sealing effect between the sealing ring 3 and the screw 48 .

[0045] like Figure 6 As shown, the fixed wedge block 42 is provided with a limiting groove 44, and the top block 45 is slidably installed inside the limiting groove 44, which prevents the top block 45 from rotating on the fixed wedge block 42 when the screw rod 48 rotates, thereby ensuring the tightening effect of the top block 45.

[0046] like Figure 6 As shown, the outer end surface of the top block 45 is an arc-shaped structure, which ensures the contact area between the top block 45 and the inner wall of the power pipeline. A plurality of criss-cross anti-slip grooves 47 are provided on the outer end surface of the top block 45 to enhance the anti-slip effect between the top block 45 and the power pipeline.

[0047] like Figure 5 As shown, the fastening structure 49 includes a plurality of gears, wherein an inner screw hole is provided in the middle of the gears, and the gears are threadedly connected with the screw rod 48, as shown in FIG. Figure 7-Figure 9 As shown, the outer ring of the outer clamping plate 5 is provided with an outer ring plate 53, and the inner part of the outer ring plate 53 is provided with an internal thread; the inner thread of the outer ring plate 53 is connected with a spiral ring 55, and an inner gear ring 551 is provided on one side of the spiral ring 55, and the inner gear ring 551 is meshed with the gear, and the feed amount of the spiral ring 55 rotating one circle on the outer ring plate 53 is equal to the feed amount of the gear rotating n circles on the screw 48 (n is the transmission ratio of the inner gear ring 551 and the gear), and a plurality of handles 552 are provided on the other side of the spiral ring 55.

[0048] When installing the sealing device, the gear is placed at the end of the screw 48, and the screw ring 55 is placed at the end of the outer ring plate 53, and the gear is meshed with the inner gear ring 551 on one side of the screw ring 55. When the handle 552 is turned, the inner gear ring 551 drives multiple gears to rotate synchronously, so that multiple positions on the sealing ring 3 and multiple inner wall tightening mechanisms are subjected to the same tightening force at the same time, thereby achieving synchronous tightening of the sealing ring 3 and multiple inner wall tightening mechanisms, ensuring the stability and reliability of the sealing ring 3 and the inner wall tightening mechanism in sealing the power pipeline, and improving the efficiency of power pipeline sealing.

[0049] like Figure 7 , Figure 8As shown, a sleeve 54 is provided on one side of the second inner hole of the outer clamping plate 5, and the cable 2 is arranged inside the sleeve 54. The inner hole of the sleeve 54 is a smooth through hole. The thickness of the outer wall of the end of the sleeve 54 away from the second inner hole is greater than the thickness of the end of the sleeve 54 close to the second inner hole, so that the sleeve 54 has a trumpet-shaped structure. A plurality of slots 542 are provided at one end of the sleeve 54, and a clamping nut 56 is threadedly connected to the sleeve 54; a limit ring 541 is provided on the sleeve 54 to limit the rotation range of the clamping nut 56, thereby preventing the clamping nut 56 from colliding with the air nozzle 36, gears and other structures when the sleeve 54 is loosened.

[0050] When the clamping nut 56 rotates toward the side away from the outer clamping plate 5, the clamping nut 56 squeezes the large end of the sleeve 54, causing the large end of the sleeve 54 to shrink inward, thereby clamping the sleeve 54 and the cable 2, achieving secondary clamping of the blocking device and further enhancing the stability of the installation of the blocking device.

[0051] like Fig.10 As shown, it also includes a plunger 6, which is used to seal a reserved power pipeline without a cable 2. The plunger 6 includes a plunger body 63 and a first thread 61 arranged at one end of the plunger body 63 and a second thread 62 arranged at the other end of the plunger body 63. A knob 64 is provided at each end of the plunger body 63. The first thread 61 is threadedly connected to the first inner hole 41 of the inner clamping plate 4, and the second thread 62 is threadedly connected to the second inner hole of the outer clamping plate 5.

[0052] When the power pipeline is not penetrated by the cable 2, the inner wall pressing mechanism presses the inner wall of the power pipeline, and after the sealing ring 3 is pressed against the inner wall of the power pipeline, the plunger 6 is connected with the inner clamping plate 4 and the outer clamping plate 5, so that the inner protrusion 32 of the sealing ring 3 is pressed against the plunger body, thereby ensuring the effect of sealing the power pipeline without the cable 2.

[0053] Furthermore, the plunger body is a bare rod, or the plunger body is provided with a plurality of annular grooves corresponding to the positions and shapes of the inner protrusions 32 , thereby ensuring the sealing effect between the sealing ring 3 and the plunger 6 .

[0054] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the scope defined by the structure of the invention, they should all fall within the protection scope of the present invention.

Claims

1. A power pipeline plugging device, comprising a sealing ring, an inner clamping plate arranged on one side of the sealing ring, and an outer clamping plate arranged on the other side of the sealing ring, characterized in that: The outer ring of the sealing ring is provided with an outer protrusion, and the inner ring of the sealing ring is provided with an inner protrusion. After the blocking device is blocked, the outer protrusion is tightly attached to the inner wall of the power pipeline, and the inner protrusion is tightly attached to the outer wall of the cable, and the sealing ring is provided with a plurality of connecting holes; the inner clamping plate is arranged away from the pipe mouth of the power pipeline, the middle part of the inner clamping plate is provided with a first inner hole, the inner clamping plate is provided with a plurality of first through holes, one side of the inner clamping plate is provided with a plurality of inner wall tightening mechanisms, and the inner wall tightening mechanisms include a fixed wedge block, the fixed wedge block is provided with a light hole, one side of the fixed wedge block is slidably connected with a top block, one side of the top block is provided with an inclined surface matched with the fixed wedge block, the top block is provided with a through waist-shaped groove, and a screw is provided in the waist-shaped groove; the outer clamping plate is arranged close to the pipe mouth of the power pipeline, the middle part of the outer clamping plate is provided with a second inner hole, the cable is placed inside the first inner hole and the second inner hole, the outer clamping plate is provided with a plurality of second through holes, the screw passes through the waist-shaped groove, the light hole, the first through hole, the connecting hole and the second through hole in sequence, and one end of the screw is threadedly connected with a fastening structure.

2. The electric power pipeline plugging device according to claim 1, characterized in that: At least two outer protrusions and inner protrusions are provided, and a plurality of outer protrusions and inner protrusions are connected in sequence to form a wave-shaped structure, so that the sealing ring can form a multi-level seal when contacting with the power pipeline and the cable.

3. The electric pipeline plugging device according to claim 1, characterized in that: The sealing ring is a hollow structure, with an air nozzle on one side of the sealing ring and an air nozzle hole for the air nozzle to pass through on the outer clamping plate. After the sealing ring is pressed against the inner wall of the power pipeline and the outer wall of the cable, gas is injected into the sealing ring through the air nozzle to make the inside of the sealing ring have a certain pressure. A number of guide sleeves are provided inside the sealing ring, and both ends of the guide sleeves are connected to the connecting holes of the sealing ring for guiding the screw and sealing the connecting holes.

4. The electric power pipeline plugging device according to claim 3, characterized in that: The guide sleeve is provided with a plurality of inwardly concave necks. When a certain pressure of gas is rushed into the sealing ring, the necks are closely attached to the outer wall of the screw.

5. The electric power pipeline plugging device according to claim 1, characterized in that: The fixed wedge block is provided with a limiting groove, and the top block is slidably installed inside the limiting groove.

6. The electric power pipeline plugging device according to claim 1, characterized in that: The outer end surface of the top block is an arc-shaped structure, and a plurality of crisscross anti-slip patterns are arranged on the outer end surface of the top block.

7. A power pipeline plugging device according to any one of claims 1 to 6, characterized in that: The fastening structure includes multiple gears, an internal screw hole is provided in the middle of the gear, the gear is threadedly connected to the screw, the outer ring plate is provided with an outer ring plate on the outer ring, and the inner part of the outer ring plate is provided with an internal thread; the inner part of the outer ring plate is threadedly connected with a spiral ring, and an inner gear ring is provided on one side of the spiral ring, the inner gear ring is meshed with the gear, and the feed amount of the spiral ring rotating one circle on the outer ring plate is equal to the feed amount of the gear rotating n circles on the screw, n is the transmission ratio of the inner gear ring to the gear, and a plurality of handles are provided on the other side of the spiral ring.

8. The electric power pipeline plugging device according to claim 7, characterized in that: A sleeve is provided on one side of the second inner hole of the outer clamping plate, and the cable is arranged inside the sleeve. The inner hole of the sleeve is a smooth through hole. The thickness of the outer wall of the end of the sleeve away from the second inner hole is greater than the thickness of the end of the sleeve close to the second inner hole, so that the sleeve has a trumpet-shaped structure. A plurality of slots are provided at one end of the sleeve, and a clamping nut is threadedly connected to the sleeve; a limit ring is provided on the sleeve.

9. The electric power pipeline plugging device according to claim 7, characterized in that: It also includes a plunger for sealing a reserved power pipeline without a cable, the plunger includes a plunger body, a first thread arranged at one end of the plunger body and a second thread arranged at the other end of the plunger body, a knob is provided at each end of the plunger body, the first thread is threadedly connected to the first inner hole of the inner clamping plate, and the second thread is threadedly connected to the second inner hole of the outer clamping plate.

10. The electric power pipeline plugging device according to claim 9, characterized in that: The plunger body is a polished rod, or the plunger body is provided with a plurality of annular grooves corresponding to the positions and shapes of the inner protrusions.

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