Waterproof auxiliary structure for insulated cable

Abstract

The waterproof auxiliary structure comprises a junction box, a sealing door is arranged on the outer wall of one side of the junction box, through holes are formed in the outer walls of the two ends of the junction box, a first cable and a second cable are inserted into the two through holes respectively, annular sealing rings are arranged in the two through holes respectively, and the first cable and the second cable are connected through the annular sealing rings. A connecting piece located in the junction box is arranged between the first cable and the second cable, and a water tank is formed in the inner bottom of the junction box. When the servo motor rotates clockwise, dry air in the air drying box can be automatically guided to the connecting piece, the connecting position of the first cable and the second cable is kept dry, meanwhile, the drying pipe can swing left and right, the contact range of the dry air and the connecting position is enlarged, and the drying effect is improved; and the output shaft of the servo motor is automatically rotated anticlockwise, so that water in the water tank can be automatically discharged, water accumulation is effectively avoided, and the waterproof capability is further enhanced.

Description

Technical Field

[0001] This invention relates to the field of cable technology, and in particular to a waterproof auxiliary structure for insulated cables. Background Technology

[0002] In the field of power transmission and distribution, insulated cables play a crucial role, being widely used in various power facilities and buildings. Since cables are often exposed to complex outdoor environments, waterproofing is a key factor in ensuring their stable operation and extending their service life. Water ingress at cable joints not only degrades the cable's insulation performance, leading to safety hazards such as short circuits and leakage, but can also damage equipment, disrupt the normal operation of the power system, and cause numerous inconveniences to production and daily life.

[0003] Currently, although some waterproofing measures for insulated cables exist on the market, most have certain limitations. Some waterproofing structures rely solely on simple seals to block rainwater, and their effectiveness is greatly reduced when faced with prolonged rainfall or aging seals. Moreover, existing waterproofing auxiliary structures lack automatic drainage functions; when small amounts of water seep in, they cannot be drained in time, and the accumulated water will gradually corrode the cable and connecting parts, posing a safety hazard. Therefore, we propose a waterproofing auxiliary structure for insulated cables. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a waterproof auxiliary structure for insulated cables.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A waterproof auxiliary structure for insulated cables includes a junction box. A sealing door is provided on one outer wall of the junction box. Through holes are provided on the outer walls of both ends of the junction box. A first cable and a second cable are respectively inserted through the two through holes. An annular sealing ring is provided in each of the two through holes. A connector located inside the junction box is provided between the first cable and the second cable. A water tank is provided in the bottom of the junction box. An air extraction component, a drying component, a triggering component, and a drainage component are provided on the junction box.

[0006] Preferably, the air extraction assembly includes a servo motor fixedly installed on one inner wall of the junction box. The output shaft of the servo motor is fixedly mounted with a rotating shaft. A protective cover fixedly installed on the junction box is provided on the outer side of the servo motor. The rotating shaft passes through the protective cover and is rotatably connected to it. A rotating block is fixedly installed at one end of the rotating shaft. A rotating rod is rotatably connected to the side wall of the rotating block away from the rotating shaft. An outer cylinder located below the rotating block is fixedly installed on one inner wall of the junction box. A first auxiliary rod is slidably connected to the outer cylinder on the side outer wall near the rotating block. An air extraction piston is fixedly installed at the end of the first auxiliary rod inside the outer cylinder and slidably connected to its inner wall. A first spring is fixedly connected between the air extraction piston and the side inner wall of the outer cylinder near the rotating block. A displacement groove located outside the outer cylinder is provided on the first auxiliary rod. A cylindrical rod located outside the outer cylinder is provided above the first auxiliary rod. A hollow drying box is provided on one inner wall of the junction box. An air inlet pipe and an air extraction pipe communicating with the interior of the outer cylinder are provided on the outer cylinder. The end of the air extraction pipe away from the outer cylinder is connected to the hollow drying box.

[0007] Preferably, the drying assembly includes two fixed blocks fixedly installed at the top of the junction box, and a drying tube located above the connector is rotatably connected between the two fixed blocks. The drying tube is provided with a plurality of nozzles communicating with its interior. One end of the drying tube passes through one of the fixed blocks and extends outward. A rotary joint is provided between the end of the air inlet pipe away from the outer cylinder and the end of the drying tube. A fixed rod is fixedly installed on the outer wall of the drying tube. A sliding groove is opened on the fixed rod. The rotating rod passes through the sliding groove and is slidably connected to the inner wall of the sliding groove.

[0008] Preferably, the triggering component includes a protective box fixedly installed on the inner wall of the other end of the junction box. A connecting rod slidably connected to the bottom of the protective box is provided through it. A float located in the water tank is fixedly installed at the end of the connecting rod outside the protective box. A second conductive block located inside the protective box is fixedly installed at the end of the connecting rod inside the protective box. A first conductive block is provided above the second conductive block inside the protective box. A power-off delay relay is provided above the first conductive block inside the protective box. The first and second conductive blocks are electrically connected to the power-off delay relay. The power-off delay relay is electrically connected to the servo motor.

[0009] Preferably, the drainage assembly includes an inner cylinder fixedly installed on the inner wall of the displacement groove near the outer cylinder. A second auxiliary rod is slidably connected to the inner cylinder on the outer wall of the inner cylinder away from the outer cylinder. A water-drawing piston is fixedly installed on the inner wall of the second auxiliary rod located inside the inner cylinder. A displacement block is fixedly installed on the outer wall of the displacement groove and slidably connected to the inner wall of the displacement groove. A second spring is fixedly connected between the displacement block and the outer wall of the inner cylinder away from the outer cylinder. A cylindrical rod is fixedly connected to the top of the displacement block. A drain pipe and a water-drawing pipe are provided on the inner cylinder and communicate with its interior. The drain pipe extends to the outside of the junction box at the end away from the inner cylinder, and the water-drawing pipe extends to the water tank at the end away from the inner cylinder.

[0010] Preferably, the ends of the air inlet pipe and the air extraction pipe that are connected to the outer cylinder are both located on the side of the air extraction piston away from the first auxiliary rod, and a one-way valve is provided in both the air inlet pipe and the air extraction pipe.

[0011] Preferably, both the first auxiliary rod and the second auxiliary rod are square rods.

[0012] Preferably, the ends of the drain pipe and the pumping pipe that are connected to the inner cylinder are both located on the side of the pumping piston away from the second auxiliary rod, and a one-way valve is provided inside the drain pipe and the pumping pipe.

[0013] The beneficial effects of this invention are: By setting up an air extraction component, the dry gas in the air drying chamber can be automatically introduced into the drying tube after the output shaft of the servo motor rotates clockwise, and finally sprayed onto the connector through the nozzle, thereby keeping the connection between the first cable and the second cable dry.

[0014] By setting up a drying component, the drying tube can be automatically swung left and right after the output shaft of the servo motor rotates, thereby increasing the contact range between the drying air and the connection between the first and second cables and improving the drying effect.

[0015] By setting up trigger components and water pumping components, the output shaft of the servo motor can be automatically rotated counterclockwise after water enters the junction box, thereby drawing the water in the tank into the inner cylinder and finally squeezing it out, further improving the waterproof effect.

[0016] This invention can automatically guide the drying gas in the air drying box [A1][2] to the connector when the servo motor rotates clockwise, keeping the connection between the first cable and the second cable dry. At the same time, it can also make the drying tube swing left and right to expand the contact range between the drying air and the connection and improve the drying effect. When water enters the junction box, it automatically makes the output shaft of the servo motor rotate counterclockwise, thereby automatically draining the water in the water tank, effectively avoiding water accumulation and further enhancing the waterproof capability. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of one side of a waterproof auxiliary structure for insulated cables proposed in this invention; Figure 2 This is a three-dimensional structural diagram of the other side of a waterproof auxiliary structure for insulated cables proposed in this invention; Figure 3 This is a three-dimensional structural diagram of the junction box of the present invention; Figure 4 This is a three-dimensional structural diagram of the present invention after being cut along the centerline of the junction box; Figure 5 This is a three-dimensional structural diagram of the present invention after being cut along the centerline of the outer and inner cylinders; Figure 6 Appendix to this invention Figure 5 A magnified structural diagram of point A in the middle.

[0018] In the diagram: 1 Junction box, 2 Sealing door, 3 First cable, 4 Through hole, 5 Annular sealing ring, 6 Second cable, 7 Drain pipe, 8 Connector, 9 Water tank, 10 Water suction pipe, 11 Air inlet pipe, 12 Hollow drying oven, 13 Suction pipe, 14 Fixed block, 15 Rotating block, 16 Protective cover, 17 Rotating rod, 18 Column rod, 19 Servo motor, 20 Rotating shaft, 21 Rotary joint, 22 Fixed rod, 23 Drying tube, 24 Displacement block, 25 Outer cylinder, 26 First auxiliary rod, 27 Inner cylinder, 28 Slide groove, 29 Suction piston, 30 First spring, 31 Water suction piston, 32 Second spring, 33 Second auxiliary rod, 34 Displacement groove, 35 Protective box, 36 Power-off delay relay, 37 First conductive block, 38 Second conductive block, 39 Connecting rod, 40 Float, 41 Nozzle. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Reference Figures 1-6A waterproof auxiliary structure for insulated cables includes a junction box 1. A sealing door 2 is provided on one outer wall of the junction box 1. Through holes 4 are provided on the outer walls of both ends of the junction box 1. A first cable 3 and a second cable 6 are respectively inserted through the two through holes 4. An annular sealing ring 5 is provided inside each of the two through holes 4. The annular sealing ring 5 effectively fills the gap between the first cable 3, the second cable 6, and the through hole 4, preventing rainwater from seeping into the junction box 1 and improving waterproof performance. A connector 8 is provided between the first cable 3 and the second cable 6, located inside the junction box 1. A water tank 9 is provided at the bottom of the junction box 1. The water tank 9 is used to collect any small amount of water that may seep into the junction box 1, preventing water from accumulating inside the junction box 1 and damaging the first cable 3, the second cable 6, and the connector 8. The junction box 1 is equipped with an air extraction assembly, which includes a servo motor 19 fixedly installed on one inner wall of the junction box 1. A rotating shaft 20 is fixedly installed on the output shaft of the servo motor 19. A protective cover 16 is fixedly installed on the junction box 1 on the outside of the servo motor 19. The rotating shaft 20 passes through the protective cover 16 and is rotatably connected to it. One end of the rotating shaft 20... A rotating block 15 is fixedly installed. A rotating rod 17 is rotatably connected to the side wall of the rotating block 15 away from the rotating shaft 20. An outer cylinder 25 located below the rotating block 15 is fixedly installed on the inner wall of one end of the junction box 1. A first auxiliary rod 26 is slidably connected to the outer wall of the outer cylinder 25 near the rotating block 15. A suction piston 29 is fixedly installed and slidably connected to the inner wall of the first auxiliary rod 26 inside the outer cylinder 25. A first spring 30 is fixedly connected between the suction piston 29 and the inner wall of the outer cylinder 25 near the rotating block 15. A displacement groove 34 is provided on the first auxiliary rod 26 outside the outer cylinder 25. A columnar rod 18 is provided above the first auxiliary rod 26 outside the outer cylinder 25. A hollow drying box 12 is provided on the inner wall of one end of the junction box 1. An air inlet pipe 11 and an air extraction pipe 13 are provided on the outer cylinder 25 and are connected to its interior. The end of the air extraction pipe 13 away from the outer cylinder 25 is connected to the hollow drying box 12. The ends of the air inlet pipe 11 and the air extraction pipe 13 connected to the outer cylinder 25 are both located on the side of the air extraction piston 29 away from the first auxiliary rod 26. A one-way valve is provided in both the air inlet pipe 11 and the air extraction pipe 13.

[0021] A drying assembly is provided on the junction box 1. The drying assembly includes two fixed blocks 14 fixedly installed on the top of the junction box 1. A drying tube 23 located above the connector 8 is rotatably connected between the two fixed blocks 14. The drying tube 23 is provided with multiple nozzles 41 that communicate with its interior. One end of the drying tube 23 passes through one of its fixed blocks 14 and extends outward. A rotary joint 21 is provided between the end of the air inlet pipe 11 away from the outer cylinder 25 and the end of the drying tube 23. A fixed rod 22 is fixedly installed on the outer wall of the drying tube 23. A sliding groove 28 is opened on the fixed rod 22. A rotating rod 17 passes through the sliding groove 28 and is slidably connected to the inner wall of the sliding groove 28.

[0022] The junction box 1 is equipped with a triggering component, which includes a protective box 35 fixedly installed on the inner wall of the other end of the junction box 1. A connecting rod 39 is slidably connected to the bottom of the protective box 35. A float 40 located inside the water tank 9 is fixedly installed at the end of the connecting rod 39 outside the protective box 35. A second conductive block 38 located inside the protective box 35 is fixedly installed at the end of the connecting rod 39 inside the protective box 35. A first conductive block 37 located above the second conductive block 38 is provided inside the protective box 35. The power-off delay relay 36 is located above the conductive block 37. The first conductive block 37 and the second conductive block 38 are electrically connected to the power-off delay relay 36. The power-off delay relay 36 is electrically connected to the servo motor 19. When the float block 40 floats up and the second conductive block 38 contacts the first conductive block 37, the circuit is turned on. The power-off delay relay 36 controls the output shaft of the servo motor 19 to rotate counterclockwise, realizing the function of automatically triggering the drainage action. At the same time, the power-off delay relay 36 can ensure that the servo motor 19 resets after a period of drainage, ensuring the drainage effect.

[0023] The junction box 1 is equipped with a drainage assembly, which includes an inner cylinder 27 fixedly installed on the inner wall of the displacement groove 34 near the outer cylinder 25. A second auxiliary rod 33 is slidably connected to the outer wall of the inner cylinder 27 away from the outer cylinder 25. A water-drawing piston 31 is fixedly installed and slidably connected to the inner wall of the second auxiliary rod 33 inside the inner cylinder 27, and a displacement block 24 is fixedly installed and slidably connected to the inner wall of the displacement groove 34 at the outer end of the second auxiliary rod 33 outside the inner cylinder 27. The displacement block 24 is fixedly connected to the outer wall of the inner cylinder 27 away from the outer cylinder 25. A second spring 32 is fixedly connected to the inner cylinder 27. A cylindrical rod 18 is fixedly connected to the top of the displacement block 24. A drain pipe 7 and a water pumping pipe 10 are provided on the inner cylinder 27 and are connected to the inside of the inner cylinder 27. The end of the drain pipe 7 away from the inner cylinder 27 extends to the outside of the junction box 1, and the end of the water pumping pipe 10 away from the inner cylinder 27 extends into the water tank 9. The first auxiliary rod 26 and the second auxiliary rod 33 are both square rods. The ends of the drain pipe 7 and the water pumping pipe 10 that are connected to the inner cylinder 27 are both located on the side of the water pumping piston 31 away from the second auxiliary rod 33. A one-way valve is provided in both the drain pipe 7 and the water pumping pipe 10.

[0024] In use, when connecting the first cable 3 and the second cable 6, the sealing door 2 is opened, allowing the first cable 3 and the second cable 6 to pass through the two through holes 4 respectively. The first cable 3 and the second cable 6 are then connected by the connector 8. The sealing door 2 is then closed. During use, the two annular sealing rings 5 ​​seal the two through holes 4, effectively preventing rainwater from entering the junction box 1 through the two through holes 4 on rainy days. In the initial state, the suction piston 29 abuts against the inner wall of the outer cylinder 25 away from the inner cylinder 27, and the displacement block 24 abuts against the inner wall of the displacement groove 34 away from the outer cylinder 25. The servo motor 19 is started. When no water accumulates in the junction box 1, the output shaft of the servo motor 19 moves along the attached... Figure 4 The state rotates clockwise. By setting the rotating shaft 20 and the rotating block 15, the rotating rod 17 can rotate clockwise around the axis of the rotating shaft 20. During the clockwise rotation of the rotating rod 17, the rotating rod 17 will come into contact with the outer wall of the cylindrical rod 18 near the outer cylinder 25 (see attached). Figure 5 (Left side of the central column rod 18) As the rotating rod 17 continues to rotate and the displacement block 24 abuts against the inner wall of the end of the displacement groove 34 away from the outer cylinder 25, the rotating rod 17 can push the column rod 18, the displacement block 24, the second auxiliary rod 33, the inner cylinder 27, the first auxiliary rod 26, and the suction piston 29 along the attached... Figure 5 The state slides to the left, thereby creating a suction effect within the outer cylinder 25. This causes the dried air inside the hollow drying oven 12 to be drawn into the outer cylinder 25 through the suction pipe 13. The first spring 30 is compressed. After the rotating rod 17 continues to rotate, it will separate from the cylindrical rod 18 and no longer be in contact. The elastic force generated by the compression of the first spring 30 can then reset the cylindrical rod 18, the displacement block 24, the second auxiliary rod 33, the inner cylinder 27, the first auxiliary rod 26, and the suction piston 29, thereby generating a squeeze. The pressure causes the heated air drawn into the outer cylinder 25 to be squeezed into the drying tube 23 through the air inlet pipe 11 and the rotary joint 21, and finally sprayed onto the surface of the connector 8 through the nozzle 41, thereby keeping the connection between the first cable 3 and the second cable 6 dry. When the rotating rod 17 rotates around the axis of the rotating shaft 20, it passes through the slide groove 28 and slides through the inner wall of the slide groove 28, thereby allowing the fixed rod 22 and the drying tube 23 to swing left and right, thereby expanding the blowing drying range and improving the drying effect. When the seal of junction box 1 is damaged, causing water to enter the junction box 1, the water will collect in the water tank 9, which will cause the float 40 to float. By setting the connecting rod 39, the second conductive block 38 can move upward. When the second conductive block 38 moves upward and comes into contact with the first conductive block 37, the output shaft of the servo motor 19 rotates counterclockwise (this is prior art), which will cause the rotating rod 17 to rotate counterclockwise. When the rotating rod 17 rotates counterclockwise, the rotating rod 17 will come into contact with the outer side of the other side of the cylindrical rod 18 (see attached diagram). Figure 5(Right side of the central column rod 18) As the rotating rod 17 continues to rotate and the suction piston 29 abuts against the inner wall of the outer cylinder 25 away from the inner cylinder 27, the first auxiliary rod 26 and the suction piston 29 will not move. Meanwhile, the column rod 18, the displacement block 24, the second auxiliary rod 33, and the water-pumping piston 31 will move to the left. The second spring 32 will be compressed. As the rotating rod 17 continues to rotate, the rotating rod 17 will no longer be in contact with the column rod 18. The elastic force generated by the compression of the second spring 32 will allow the column rod 18, the displacement block 24, the second auxiliary rod 33, and the water-pumping piston 31 to move to the left. Piston 31 resets, and this process repeats. The reciprocating motion of the pumping piston 31 within the inner cylinder 27 allows water in the water tank 9 to be drawn into the inner cylinder 27 through the pumping pipe 10, and then squeezed out of the junction box 1 through the drain pipe 7, thus achieving self-drainage. After drainage, the float 40 and the second conductive block 38 are forced to reset downwards by gravity, and the first conductive block 37 no longer contacts the second conductive block 38. By setting a power-off delay relay 36, the output shaft of the servo motor 19 can continue to rotate counterclockwise for a period of time before resetting to clockwise rotation, thereby ensuring the drainage effect.

[0025] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A waterproof auxiliary structure for insulated cables, comprising a junction box (1), characterized in that, A sealing door (2) is provided on one side of the outer wall of the junction box (1). Through holes (4) are provided on both ends of the outer wall of the junction box (1). A first cable (3) and a second cable (6) are respectively inserted through the two through holes (4). An annular sealing ring (5) is provided in both through holes (4). A connector (8) located inside the junction box (1) is provided between the first cable (3) and the second cable (6). A water tank (9) is provided at the bottom inside the junction box (1). An air extraction component is provided on the junction box (1). A drying component is provided on the junction box (1). A trigger component is provided on the junction box (1). A drainage component is provided on the junction box (1).

2. The waterproof auxiliary structure for insulated cables according to claim 1, characterized in that, The air extraction assembly includes a servo motor (19) fixedly installed on the inner wall of one side of the junction box (1). The output shaft of the servo motor (19) is fixedly mounted with a rotating shaft (20). A protective cover (16) fixedly installed on the outer side of the servo motor (19) is provided on the junction box (1). The rotating shaft (20) passes through the protective cover (16) and is rotatably connected to it. A rotating block (15) is fixedly installed at one end of the rotating shaft (20). A rotating rod (17) is rotatably connected to the side wall of the rotating block (15) away from the rotating shaft (20). An outer cylinder (25) located below the rotating block (15) is fixedly installed on the inner wall of one end of the junction box (1). A first auxiliary rod (25) slidably connected to the outer cylinder (25) is provided through the side outer wall of the outer cylinder (25) near the rotating block (15). 26), the first auxiliary rod (26) is fixedly installed with a suction piston (29) that is slidably connected to its inner wall at one end inside the outer cylinder (25). A first spring (30) is fixedly connected between the suction piston (29) and the inner wall of the outer cylinder (25) near the rotating block (15). A displacement groove (34) is opened on the first auxiliary rod (26) outside the outer cylinder (25). A columnar rod (18) is set above the first auxiliary rod (26) outside the outer cylinder (25). A hollow drying box (12) is set on the inner wall of one end of the junction box (1). An air inlet pipe (11) and a suction pipe (13) connected to the inside of the outer cylinder (25) are provided on the outer cylinder (25). The end of the suction pipe (13) away from the outer cylinder (25) is connected to the hollow drying box (12).

3. The waterproof auxiliary structure for insulated cables according to claim 2, characterized in that, The drying assembly includes two fixed blocks (14) fixedly installed at the top of the junction box (1). A drying tube (23) located above the connector (8) is rotatably connected between the two fixed blocks (14). The drying tube (23) is provided with a plurality of nozzles (41) communicating with its interior. One end of the drying tube (23) passes through one of its fixed blocks (14) and extends outward. A rotary joint (21) is provided between the end of the air inlet pipe (11) away from the outer cylinder (25) and the end of the drying tube (23). A fixed rod (22) is fixedly installed on the outer wall of the drying tube (23). A sliding groove (28) is opened on the fixed rod (22). The rotating rod (17) passes through the sliding groove (28) and is slidably connected to the inner wall of the sliding groove (28).

4. The waterproof auxiliary structure for insulated cables according to claim 3, characterized in that, The triggering component includes a protective box (35) fixedly installed on the inner wall of the other end of the junction box (1). A connecting rod (39) is slidably connected to the bottom of the protective box (35). A float (40) located in the water tank (9) is fixedly installed at one end of the connecting rod (39) outside the protective box (35). A second conductive block (38) located inside the protective box (35) is fixedly installed at one end of the connecting rod (39) inside the protective box (35). A first conductive block (37) located above the second conductive block (38) is provided inside the protective box (35). A power-off delay relay (36) located above the first conductive block (37) is provided inside the protective box (35). The first conductive block (37) and the second conductive block (38) are electrically connected to the power-off delay relay (36). The power-off delay relay (36) is electrically connected to the servo motor (19).

5. A waterproof auxiliary structure for insulated cables according to claim 4, characterized in that, The drainage assembly includes an inner cylinder (27) fixedly installed on the inner wall of the displacement groove (34) near the outer cylinder (25). A second auxiliary rod (33) is slidably connected to the outer wall of the inner cylinder (27) away from the outer cylinder (25). A water-drawing piston (31) is fixedly installed on the inner wall of the second auxiliary rod (33) inside the inner cylinder (27), and a water-drawing piston (31) is fixedly installed on the outer wall of the second auxiliary rod (33) outside the inner cylinder (27). A displacement block (24) is fixedly connected to the outer wall of the inner cylinder (27) away from the outer cylinder (25) by a second spring (32). The column rod (18) is fixedly connected to the top of the displacement block (24). The inner cylinder (27) is provided with a drain pipe (7) and a water pumping pipe (10) that are connected to its interior. The drain pipe (7) extends to the outside of the junction box (1) at the end away from the inner cylinder (27), and the water pumping pipe (10) extends to the inside of the water tank (9) at the end away from the inner cylinder (27).

6. A waterproof auxiliary structure for insulated cables according to claim 2, characterized in that, The ends of the air inlet pipe (11) and the air extraction pipe (13) connected to the outer cylinder (25) are both located on the side of the air extraction piston (29) away from the first auxiliary rod (26). One-way valves are provided in both the air inlet pipe (11) and the air extraction pipe (13).

7. A waterproof auxiliary structure for insulated cables according to claim 5, characterized in that, Both the first auxiliary rod (26) and the second auxiliary rod (33) are square rods.

8. A waterproof auxiliary structure for insulated cables according to claim 5, characterized in that, The ends of the drain pipe (7) and the pumping pipe (10) that are connected to the inner cylinder (27) are both located on the side of the pumping piston (31) away from the second auxiliary rod (33). Both the drain pipe (7) and the pumping pipe (10) are equipped with one-way valves.

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