Cable connecting device, connecting method and cable

Abstract

The invention belongs to the technical field of cable connection, and particularly relates to a cable connecting device, a connecting method and a cable, the cable connecting device comprises a cable body, a female head and a male head, the female head is provided with a wiring end, and the female head and the male head are both connected with the cable body; a group of connecting plates are fixedly connected to the side wall of the son head, clamping grooves are formed in the outer side walls of the connecting plates, a connecting sleeve is fixedly connected to the outer side wall of the mother head, a circular groove is formed in the end, close to the son head, of the connecting sleeve, and the connecting plates can be inserted into the circular groove; when the male head and the female head are plugged, the connecting plate enters the circular groove, the inclined surface of the clamping block is pushed in the entering process, so that the clamping block moves upwards, then when the male head and the female head are plugged, the position of the clamping groove corresponds to the clamping block, and the clamping block is clamped with the clamping groove under the pushing of the first spring at the moment; and therefore, the effect of quickly assembling the secondary head and the primary head is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of cable connection, in particular to a cable connection device, a connection method and a cable. Background Art

[0002] Cable connectors are key components in cable systems, primarily used to achieve electrical connections between cables and ensure stable current or signal transmission. They provide reliable physical support through mechanical fixation (such as thread locking and plug-in design) to prevent loosening or damage.

[0003] Cables usually need to be connected in multiple sections. When the cable connector is threaded and locked, workers need to carry tools to tighten the cable connector to fix it, so that the multiple cable sections can be firmly fixed together.

[0004] However, the above technology often has the following defects: since the laying distance between multiple cable sections is relatively far, workers need to carry tools and walk long distances to reach the connection point for tightening and fixing operations when installing cable connectors. This working method is not only time-consuming and labor-intensive, but also reduces construction efficiency. Especially in complex terrain or large-scale engineering sites, the problem is more prominent, increasing the labor intensity and time cost of workers. For this reason, the present invention provides a cable connection device, a connection method and a cable. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a cable connection device described in the present invention includes a cable body, a female head and a sub-head, the female head is provided with a wiring terminal, and the female head and the sub-head are both connected to the cable body; the side wall of the sub-head is fixedly connected with a group of connecting plates, the outer wall of the connecting plate is provided with a card groove, the outer wall of the female head is fixedly connected with a connecting sleeve, the connecting sleeve is provided with a circular groove at one end close to the sub-head, and the connecting plate can be inserted into the circular groove; the inner wall of the circular groove is provided with a group of sliding grooves, the inner wall of the sliding groove is slidably connected with a card block, the bottom surface of the card block is inclined, the card block is clamped with the card groove, and a first spring is fixedly connected between the top surface of the card block and the inner wall of the sliding groove.

[0007] Preferably, a circular groove corresponding to the card slot is opened in the connecting sleeve, and a magnetic ring that is magnetically attracted to the card block is slidably connected in the circular groove. The card block is made of magnetic material, and the connecting sleeve is slidably connected to a connecting rod at one end close to the sub-head, and the connecting rod is fixedly connected to the magnetic ring at one end close to the card block, and a second spring is fixedly connected between the side of the magnetic ring close to the connecting rod and the inner wall of the circular groove.

[0008] Preferably, a hollow groove is provided inside the connecting sleeve, the outer wall of the connecting sleeve is provided with a liquid inlet pipe connected to the hollow groove, an oil inlet one-way valve is provided in the liquid inlet pipe, a group of penetrating connecting grooves are provided on the side wall of the female head, and the inner wall of the hollow groove is provided with a discharge groove connected to the connecting groove.

[0009] Preferably, a push ring is sealingly and slidingly connected in the hollow groove, a third spring is fixedly connected between the end of the push ring away from the sub-head and the inner wall of the hollow groove, and a sealing mechanism for sealing the discharge trough is provided on the connecting sleeve.

[0010] Preferably, the sealing mechanism includes an elastic ring fixedly connected to the inner wall of the circular groove, the interior of the elastic ring is a hollow structure, a group of first movable grooves and second movable grooves are provided in the connecting sleeve, the first movable groove is aligned with the second movable groove, and a sealing plate is provided in the first movable groove and the second movable groove, the sealing plate is sealingly and slidingly connected to the first movable groove, a through groove is provided on the sealing plate, an air inlet is provided on the inner wall of the first movable groove, an air outlet connected to the air inlet is provided on the side of the elastic ring close to the first movable groove, and a fourth spring is fixedly connected between the side of the sealing plate away from the elastic ring and the inner wall of the second movable groove.

[0011] Preferably, an annular fixing groove is provided on a side of the female head close to the male head, and an elastic and hollow sealing ring is fixedly connected to the inner wall of the fixing groove.

[0012] A cable includes the above-mentioned cable connector, wherein the cable body includes a filling layer, a shielding layer, an insulating layer and a braided layer, the shielding layer is wrapped on the conductor, the filling layer is filled between the shielding layer and the conductor, the shielding layer is wrapped with an insulating layer, and a group of annularly evenly distributed connection points are provided outside the insulating layer, the connection points are made of rubber material, and the braided layer is connected to the connection points.

[0013] Preferably, the outer side wall of the braided layer is wrapped with an armor layer, and the armor layer may be composed of multiple layers of steel strips, and annularly evenly distributed steel wires are arranged in the armor layer.

[0014] A cable connection method, which is used to connect the above-mentioned cable, comprises the following steps:

[0015] S1: Insulating oil is injected into the hollow groove from the liquid inlet pipe. The insulating oil entering the hollow groove will push the push ring to move. After a certain amount of insulating oil is injected into the hollow groove, the injection is stopped and the insulating oil is stored in the hollow groove;

[0016] S2: Check the sub-connector and the female connector to see if there is any fault. Then plug the sub-connector into the female connector until the sub-connector fits tightly into the terminal.

[0017] S3: During the insertion process, the connecting plate will also enter the circular groove, pushing the inclined surface of the card block in the process, causing the card block to move upward. Then, when the male connector and the female connector are plugged in, the position of the card slot will correspond to the card block. At this time, the card block will be engaged with the card slot under the push of the first spring.

[0018] S4: During the insertion of the connecting plate, the through hole on the sealing plate is moved to the discharge slot. At this time, the insulating oil can be pushed by the push ring through the discharge slot into the female connector, allowing the insulating oil to effectively fill the gap between the sub-connector and the terminal.

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

[0020] 1. When the sub-head and the female head in the present invention are plugged in, the connecting plate will enter the circular groove. During the entry process, it will push the inclined surface of the card block, causing the card block to move upward. Then, when the sub-head and the female head are plugged in, the position of the card slot will correspond to the card block. At this time, the card block will be plugged into the card slot under the push of the first spring, thereby achieving the effect of quickly assembling the sub-head and the female head.

[0021] 2. When the sub-head and the female head need to be disassembled, the connecting rod can be pulled to drive the magnetic ring to move, so that the magnetic ring moves to the rear of the card block. At this time, the card block will be attracted by the magnetic ring and separated from the card slot. Then the sub-head can be pulled to separate it from the female head to complete the disassembly of the sub-head and the female head. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 It is a structural schematic diagram of the connecting device in the present invention;

[0024] Figure 2 This is a schematic diagram of the assembly structure of the female connector and the female connector in the present invention;

[0025] Figure 3 yes Figure 2 A magnified view of point A;

[0026] Figure 4 This is a front view of the female connector and the female connector in the present invention;

[0027] Figure 5 yes Figure 4 Schematic diagram of the structure;

[0028] Figure 6 It is a structural schematic diagram of the cable body in the present invention;

[0029] Figure 7 It is a flow chart of the method in the present invention.

[0030] In the figure: 1. Cable body; 2. Conductor; 3. Filling layer; 4. Shielding layer; 5. Insulation layer; 6. Braided layer; 7. Connection point; 8. Steel wire; 9. Armor layer; 10. Air inlet; 11. Female connector; 12. Female connector; 13. Connecting sleeve; 14. Connecting plate; 15. Terminal; 16. Slot; 17. Slide; 18. Block; 19. Magnetic ring; 20. Connecting rod; 21. Hollow groove; 22. Liquid inlet pipe; 23. Push ring; 24. Discharge trough; 25. Connecting groove; 26. Sealing plate; 27. Through groove; 28. First movable groove; 29. Elastic ring; 30. Second movable groove; 31. Sealing ring; 32. Fixed groove. DETAILED DESCRIPTION

[0031] 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.

[0032] Example 1: Figures 1 to 3 As shown, a cable connection device according to an embodiment of the present invention includes a cable body 1, a female head 11 and a sub-head 12, the female head 11 is provided with a wiring terminal 15, and the female head 11 and the sub-head 12 are both connected to the cable body 1; a group of connecting plates 14 are fixedly connected to the side wall of the sub-head 12, and a card groove 16 is provided on the outer wall of the connecting plate 14, and a connecting sleeve 13 is fixedly connected to the outer wall of the female head 11, and a circular groove is provided at one end of the connecting sleeve 13 close to the sub-head 12, and the connecting plate 14 can be inserted into the circular groove; a group of sliding grooves 17 are provided on the inner wall of the circular groove, and a card block 18 is slidably connected to the inner wall of the sliding groove 17, and the bottom surface of the card block 18 is inclined, and the card block 18 is clamped with the card groove 16, and a first spring is fixedly connected between the top surface of the card block 18 and the inner wall of the sliding groove 17;

[0033] When the cable bodies 1 need to be connected, the present application can plug the sub-head 12 into the female head 11, so that the sub-head 12 is inserted into the terminal 15, and the sub-head 12 will fit tightly with the female head 11. During the insertion process, the connecting plate 14 will also enter the circular groove, and during the entry process, it will push the inclined surface of the card block 18, so that the card block 18 moves upward. Then, when the sub-head 12 and the female head 11 are plugged in, the position of the card slot 16 will correspond to the card block 18. At this time, the card block 18 will be connected with the card slot 16 under the push of the first spring, thereby achieving the effect of quickly assembling the sub-head 12 and the female head 11, thereby improving the convenience of connection between multiple sections of cable bodies 1.

[0034] A circular groove corresponding to the card slot 16 is formed in the connecting sleeve 13, and a magnetic ring 19 that is magnetically attracted to the card block 18 is slidably connected in the circular groove. The card block 18 is made of magnetic material. A connecting rod 20 is slidably connected to the end of the connecting sleeve 13 close to the sub-head 12. The end of the connecting rod 20 close to the card block 18 is fixedly connected to the magnetic ring 19. A second spring is fixedly connected between the side of the magnetic ring 19 close to the connecting rod 20 and the inner wall of the circular groove;

[0035] When the sub-head 12 and the female head 11 need to be disassembled, the present application can pull the connecting rod 20 so that the connecting rod 20 drives the magnetic ring 19 to move, thereby moving the magnetic ring 19 to the rear of the block 18. At this time, the block 18 will be attracted by the magnetic ring 19 and disengaged from the card slot 16. Then the sub-head 12 can be pulled out to disengage it from the female head 11 to complete the disassembly of the sub-head 12 and the female head 11.

[0036] The connecting sleeve 13 has a hollow groove 21 formed inside, and an outer wall of the connecting sleeve 13 is provided with a liquid inlet pipe 22 connected to the hollow groove 21. An oil inlet check valve is provided in the liquid inlet pipe 22. The side wall of the female connector 11 has a set of connecting grooves 25 extending therethrough, and the inner wall of the hollow groove 21 has a discharge groove 24 connected to the connecting groove 25.

[0037] After the connection between the sub-head 12 and the female head 11 is completed, insulating oil can be injected from the liquid inlet pipe 22, so that the insulating oil enters the hollow groove 21, and then passes through the discharge groove 24 and the connection groove 25, and finally enters the female head 11. At this time, the insulating oil will fill the inside of the female head 11 and the sub-head 12, so that the insulating oil effectively fills the gap at the connection between the sub-head 12 and the terminal 15, eliminates air and moisture, prevents local discharge and corona phenomena, and significantly improves the insulation strength. At the same time, it can also improve the heat dissipation effect and reduce temperature rise. When the insulating oil is injected into the female head 11, the air in the female head 11 can be discharged from the joint between the sub-head 12 and the female head 11.

[0038] A push ring 23 is sealingly and slidingly connected in the hollow groove 21, and a third spring is fixedly connected between the end of the push ring 23 away from the sub-head 12 and the inner wall of the hollow groove 21, and a sealing mechanism for sealing the discharge groove 24 is provided on the connecting sleeve 13; the present application can first inject insulating oil into the hollow groove 21 from the liquid inlet pipe 22, at this time the insulating oil will push the push ring 23 to move to the side away from the block 18, and after a certain amount of insulating oil is injected into the hollow groove 21, the injection is stopped, and the insulating oil can be stored in the hollow groove 21. When the insulating oil is needed, the sealing mechanism can no longer seal the discharge groove 24. At this time, the push ring 23 will push the insulating oil under the thrust of the third spring, so that the insulating oil can be injected from the discharge groove 24 into the female head 11, so as to improve the convenience of using the insulating oil.

[0039] The sealing mechanism includes an elastic ring 29 fixedly connected to the inner wall of the circular groove, the interior of the elastic ring 29 is a hollow structure, a group of first movable grooves 28 and second movable grooves 30 are opened in the connecting sleeve 13, the first movable grooves 28 are aligned with the second movable grooves 30, and a sealing plate 26 is provided in the first movable grooves 28 and the second movable grooves 30, the sealing plate 26 is sealingly and slidingly connected to the first movable groove 28, a through groove 27 is opened on the sealing plate 26, the inner wall of the first movable groove 28 is opened with an air inlet 10, the side of the elastic ring 29 close to the first movable groove 28 is opened with an air outlet connected to the air inlet 10, and a fourth spring is fixedly connected between the side of the sealing plate 26 away from the elastic ring 29 and the inner wall of the second movable groove 30;

[0040] When the connecting plate 14 in the present application is inserted into the circular groove, the connecting plate 14 will squeeze the elastic ring 29. At this time, the gas in the elastic ring 29 will enter the air inlet 10 from the air outlet, so that the gas pushes the sealing plate 26 in the first connecting plate 14, so that the through groove 27 on the sealing plate 26 moves to the discharge groove 24. At this time, the insulating oil in the hollow groove 21 can enter the female head 11. Under normal circumstances, the sealing plate 26 will be pushed by the fourth spring to allow the through groove 27 on the sealing plate 26 to be located in the first connecting groove 25. At this time, the sealing plate 26 can seal the discharge groove 24.

[0041] Example 2: Figures 4 and 5 As shown, compared with Example 1, another implementation of the present invention is: an annular fixing groove 32 is provided on the side of the female head 11 close to the sub-head 12, and the inner wall of the fixing groove 32 is fixedly connected with an elastic and hollow sealing ring 31; when the female head 11 and the sub-head 12 in this application are connected, the port of the sub-head 12 will push and squeeze the sealing ring 31, so that the sealing ring 31 seals the connection between the sub-head 12 and the female head 11 to prevent subsequent water vapor and the like from affecting the use of the insulating oil in the female head 11.

[0042] like Figure 6As shown, a cable includes the above-mentioned cable connector, the cable body 1 includes a filling layer 3, a shielding layer 4, an insulating layer 5 and a braided layer 6, the shielding layer 4 is wrapped on the conductor 2, the filling layer 3 is filled between the shielding layer 4 and the conductor 2, the shielding layer 4 is wrapped with an insulating layer 5, and a group of annularly evenly distributed connection points 7 are arranged outside the insulating layer 5, the connection points 7 are made of rubber material, and the braided layer 6 is connected to the connection points 7; the present application can reduce electromagnetic interference and improve the effect of signal transmission through the shielding layer 4, the shielding layer 4 can be made of aluminum foil material, the insulating layer 5 can be made of PVC material, which is used to prevent current leakage and protect the conductor 2 from external influences, the braided layer 6 can be made of aramid fiber material, which can protect the insulating layer 5 and improve the wear resistance of the insulating layer 5. At the same time, the braided layer 6 can be firmly fixed on the insulating layer 5 through the annularly evenly distributed connection points 7.

[0043] The outer wall of the braided layer 6 is wrapped with an armor layer 9, which can be composed of multiple layers of steel belts. An annularly evenly distributed steel wire 8 is arranged inside the armor layer 9; in this application, the armor layer 9 can improve the mechanical strength of the cable and prevent damage from external forces. At the same time, the multiple layers of steel belts in the armor layer 9 can be connected by steel wires 8 to further improve the mechanical strength of the armor layer 9.

[0044] like Figure 7 As shown, a cable connection method is used to connect the above-mentioned cable, and the method includes the following steps:

[0045] S1: Insulating oil is injected into the hollow groove 21 from the liquid inlet pipe 22. The insulating oil entering the hollow groove 21 pushes the push ring 23 to move. After a certain amount of insulating oil is injected into the hollow groove 21, the injection is stopped and the insulating oil is stored in the hollow groove 21.

[0046] S2: Check the sub-connector 12 and the female connector 11 to see if there are any faults. Then, plug the sub-connector 12 into the female connector 11 so that the sub-connector 12 is inserted into the terminal 15. At this time, the sub-connector 12 will fit tightly with the female connector 11.

[0047] S3: During the insertion process, the connecting plate 14 will also enter the circular groove, and in the process of entering, it will push the inclined surface of the card block 18, so that the card block 18 moves upward. Then, when the sub-head 12 and the female head 11 are plugged in, the position of the card slot 16 will correspond to the card block 18. At this time, the card block 18 will be engaged with the card slot 16 under the push of the first spring;

[0048] S4: During the insertion of the connecting plate 14, the through hole on the sealing plate 26 is moved to the discharge groove 24. At this time, the insulating oil can be pushed by the push ring 23 so that the discharge groove 24 enters the female connector 11, allowing the insulating oil to effectively fill the gap between the sub-connector 12 and the terminal 15.

[0049] Working principle: By plugging the sub-head 12 into the female head 11, the sub-head 12 is inserted into the terminal 15, and the sub-head 12 will fit tightly with the female head 11. During the insertion process, the connecting plate 14 will also enter the circular groove, and the inclined surface of the card block 18 will be pushed during the entry process, so that the card block 18 moves upward. Then, when the sub-head 12 and the female head 11 are plugged in, the position of the card slot 16 will correspond to the card block 18. At this time, the card block 18 will be plugged into the card slot 16 under the push of the first spring, thereby achieving The effect of quickly assembling the sub-head 12 and the female head 11 is achieved, which improves the convenience of connecting the multi-segment cable body 1; when the sub-head 12 and the female head 11 need to be disassembled, the connecting rod 20 can be pulled to cause the connecting rod 20 to drive the magnetic ring 19 to move, so that the magnetic ring 19 moves to the rear of the clamping block 18. At this time, the clamping block 18 will be attracted by the magnetic ring 19 and disengaged from the clamping slot 16. Then, the sub-head 12 can be pulled to disengage it from the female head 11, thereby completing the disassembly of the sub-head 12 and the female head 11;

[0050] After the sub-head 12 is connected to the female head 11, the present application can inject insulating oil from the liquid inlet pipe 22, so that the insulating oil enters the hollow groove 21, and then passes through the discharge groove 24 and the connecting groove 25, and finally enters the female head 11. At this time, the insulating oil will fill the inside of the female head 11 and the sub-head 12, so that the insulating oil can effectively fill the gap between the sub-head 12 and the terminal 15, exclude air and moisture, prevent local discharge and corona phenomena, and significantly improve the insulation strength. At the same time, it can also improve the heat dissipation effect and reduce temperature rise. When the insulating oil is injected into the female head 11, the air in the female head 11 can be discharged from the joint between the sub-head 12 and the female head 11; the present application can first inject insulating oil into the hollow groove 21 from the liquid inlet pipe 22. At this time, the insulating oil will push the push ring 23 to move to the side away from the block 18. After a certain amount of insulating oil is injected into the hollow groove 21, the injection is stopped. At this time, the insulating oil It can be stored in the hollow groove 21. When insulating oil is needed, the sealing mechanism no longer seals the discharge groove 24. At this time, the push ring 23 will push the insulating oil under the thrust of the third spring, so that the insulating oil can be injected into the female head 11 from the discharge groove 24, so as to improve the convenience of using the insulating oil; when the connecting plate 14 in the present application is inserted into the circular groove, the connecting plate 14 will squeeze the elastic ring 29. At this time, the gas in the elastic ring 29 will enter the air inlet 10 from the air outlet, so that the gas pushes the sealing plate 26 in the first connecting plate 14, so that the through groove 27 on the sealing plate 26 moves to the discharge groove 24. At this time, the insulating oil in the hollow groove 21 can enter the female head 11. Under normal circumstances, the sealing plate 26 will be pushed by the fourth spring so that the through groove 27 on the sealing plate 26 is located in the first connecting groove 25. At this time, the sealing plate 26 can seal the discharge groove 24.

[0051] The above-mentioned front, back, left, right, up and down are all based on the Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship 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 limiting the scope of protection of the present invention.

[0053] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A cable connection device, comprising a cable body, a female connector, and a female connector, wherein the female connector is provided with a terminal, and the female connector and the female connector are both connected to the cable body; Its characteristics are: The side wall of the sub-head is fixedly connected to a group of connecting plates, the outer side walls of the connecting plates are provided with a slot, the outer side wall of the female head is fixedly connected to a connecting sleeve, the end of the connecting sleeve close to the sub-head is provided with a circular groove, and the connecting plate can be inserted into the circular groove; A group of sliding grooves are opened on the inner wall of the circular groove, and a clamping block is slidably connected to the inner wall of the sliding groove. The bottom surface of the clamping block is inclined, and the clamping block is clamped with the groove, and a first spring is fixedly connected between the top surface of the clamping block and the inner wall of the sliding groove.

2. A cable connection device according to claim 1, characterized in that: A circular groove corresponding to the card slot is provided in the connecting sleeve, and a magnetic ring that is magnetically attracted to the card block is slidably connected in the circular groove. The card block is made of magnetic material, and a connecting rod is slidably connected to the end of the connecting sleeve close to the sub-head, and the end of the connecting rod close to the card block is fixedly connected to the magnetic ring, and a second spring is fixedly connected between the side of the magnetic ring close to the connecting rod and the inner wall of the circular groove.

3. A cable connection device according to claim 2, characterized in that: A hollow groove is provided inside the connecting sleeve, and a liquid inlet pipe connected to the hollow groove is provided on the outer wall of the connecting sleeve. An oil inlet one-way valve is provided in the liquid inlet pipe. A group of penetrating connecting grooves are provided on the side wall of the female head, and a discharge groove connected to the connecting groove is provided on the inner wall of the hollow groove.

4. A cable connection device according to claim 3, characterized in that: A push ring is sealingly and slidingly connected in the hollow groove, a third spring is fixedly connected between the end of the push ring away from the sub-head and the inner wall of the hollow groove, and a sealing mechanism for sealing the discharge trough is provided on the connecting sleeve.

5. A cable connection device according to claim 4, characterized in that: The sealing mechanism includes an elastic ring fixedly connected to the inner wall of the circular groove, the interior of the elastic ring is a hollow structure, a group of first movable grooves and second movable grooves are provided in the connecting sleeve, the first movable grooves are aligned with the second movable grooves, and a sealing plate is provided in the first movable groove and the second movable groove, the sealing plate is sealingly and slidingly connected to the first movable groove, a through groove is provided on the sealing plate, an air inlet is provided on the inner wall of the first movable groove, an air outlet connected to the air inlet is provided on the side of the elastic ring close to the first movable groove, and a fourth spring is fixedly connected between the side of the sealing plate away from the elastic ring and the inner wall of the second movable groove.

6. A cable connection device according to claim 5, characterized in that: An annular fixing groove is provided on one side of the female head close to the male head, and an elastic and hollow sealing ring is fixedly connected to the inner wall of the fixing groove.

7. A cable comprising the cable connector according to claim 6, characterized in that: The cable body includes a filling layer, a shielding layer, an insulating layer and a braided layer. The shielding layer is wrapped on the conductor, and the filling layer is filled between the shielding layer and the conductor. The shielding layer is wrapped with an insulating layer. A group of annularly evenly distributed connection points are arranged outside the insulating layer. The connection points are made of rubber material, and the braided layer is connected to the connection points.

8. A cable according to claim 7, characterized in that: The outer side wall of the braided layer is wrapped with an armor layer, which is composed of multiple layers of steel strips. Annular uniformly distributed steel wires are arranged in the armor layer.

9. A cable connection method for connecting a cable according to claim 7, characterized in that: The method comprises the following steps: S1: Insulating oil is injected into the hollow groove from the liquid inlet pipe. The insulating oil entering the hollow groove will push the push ring to move. After a certain amount of insulating oil is injected into the hollow groove, the injection is stopped and the insulating oil is stored in the hollow groove; S2: Check the sub-connector and the female connector to see if there is any fault. Then plug the sub-connector into the female connector until the sub-connector fits tightly into the terminal. S3: During the insertion process, the connecting plate will also enter the circular groove, pushing the inclined surface of the card block in the process, causing the card block to move upward. Then, when the male connector and the female connector are plugged in, the position of the card slot will correspond to the card block. At this time, the card block will be engaged with the card slot under the push of the first spring. S4: During the insertion of the connecting plate, the through hole on the sealing plate is moved to the discharge slot. At this time, the insulating oil can be pushed by the push ring through the discharge slot into the female connector, allowing the insulating oil to effectively fill the gap between the sub-connector and the terminal.

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