An ultra-high voltage cable intermediate joint filled with environmentally friendly gas

Abstract

The present application relates to the technical field of electric power engineering, and discloses a cable intermediate joint filled with superhigh-pressure environment-friendly gas, which comprises a cable connection left head and a cable connection right head arranged at the right end of the cable connection left head, a sealing assembly is arranged on the right side of the cable connection left head, a cable connection assembly is arranged on the inner side of the cable connection left head, a superhigh-pressure environment-friendly gas adjusting assembly is arranged on the outer side of the cable connection left head, and a cable fixing sealing assembly is arranged on the left side of the cable connection left head. The cable intermediate joint filled with superhigh-pressure environment-friendly gas is provided with an air pressure sensor, a gas filling inner cavity, an exhaust port sealing gasket and a micro electric control gas injection pump. When the air pressure needs to be adjusted, the air pressure sensor is used for real-time monitoring, the micro electric control gas injection pump is used for precise gas injection, the exhaust port sealing gasket is used for sealing, and when the air pressure exceeds a preset value, the exhaust port sealing gasket is automatically adjusted by the sealing gasket limiting frame, so that the dynamic balance of the air pressure is realized, and the safe and stable operation of the equipment is ensured.

Description

Technical Field

[0001] This invention relates to the field of power engineering technology, and in particular to an ultra-high voltage cable intermediate joint filled with environmentally friendly gas. Background Technology

[0002] Cable joints are key components that connect two cables. They are used to achieve electrical and mechanical connections between the cable conductors, insulation layers, and shielding layers, ensuring the continuous transmission of electrical energy in the cable line. They must have good insulation, sealing, and mechanical strength, be able to adapt to different environments, protect the joint from external factors, and ensure the safe and stable operation of the cable system.

[0003] A search revealed that Chinese patent application CN216436780U discloses a cable intermediate connector, comprising a connecting sleeve fitted over the connection ends of two wire cores, a connector located within the connecting sleeve, and sleeves fitted over both ends of the connecting sleeve. The connecting sleeve is threaded onto the wire cores at both ends, and the sleeves are threaded onto the wire cores and the connecting sleeve. The connector includes two connector heads and a connecting rod connecting the two connector heads, with the connector heads threadedly fixed to the end faces of the wire cores. This invention utilizes the connecting sleeve and connector to connect the inner and outer sides of the wire cores, resulting in a secure connection. The threaded connection method allows for quick and convenient connection. Simultaneously, the connector provides conductivity, and the connecting sleeve provides shielding, effectively protecting the connection point. However, in practical use, this solution still has the following shortcomings:

[0004] In the connection of ultra-high voltage cables, cable joints play a crucial role. Traditional cable joints often use ordinary rubber gaskets or sealants for sealing. However, this sealing method is easily affected by factors such as ambient temperature and humidity during long-term use, leading to a decline in sealing performance and potential problems such as air leakage and water ingress, which can affect the normal operation of the cable. Moreover, in terms of insulation, traditional methods often use a single insulating material or structure, which is difficult to meet the high insulation requirements of ultra-high voltage environments, and is prone to phenomena such as partial discharge, reducing the cable's service life and safety.

[0005] Therefore, it is necessary to design an ultra-high voltage cable intermediate joint filled with environmentally friendly gas to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing an ultra-high voltage cable intermediate joint filled with environmentally friendly gas.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A cable intermediate joint for ultra-high pressure charging with environmentally friendly gas includes a left cable connector and a right cable connector located at the right end of the left cable connector. A sealing component is provided on the right side of the left cable connector, a cable connector component is provided on the inner side of the left cable connector, an ultra-high pressure charging with environmentally friendly gas regulating component is provided on the outer side of the left cable connector, and a cable fixing sealing component is provided on the left side of the left cable connector.

[0009] In a preferred embodiment of the present invention, the sealing assembly includes a threaded sleeve welded to the inner right end of the left end of the cable connector. A spiral sealing groove is provided on the inner side of the threaded sleeve, and a sealing gasket is installed on the inner side of the spiral sealing groove. An outer sealing frame is welded to the outer side of the threaded sleeve, and a sealing strip is provided on the right side of the outer sealing frame. A threaded connector is welded to the left side of the right end of the cable connector, and a sealing strip groove is provided on the outer side of the threaded connector. The threaded connector and the threaded sleeve are connected by a thread. The threaded connector is inserted into the spiral sealing groove and sealed by the sealing gasket. The left end and the right end of the cable connector are connected to the threaded sleeve via the threaded connector.

[0010] As a preferred embodiment of the present invention, the sealing strip and the outer sealing frame are bonded together, the sealing strip and the sealing strip groove are connected by a slot, the outer sealing frame and the sealing strip groove form a sealing structure through the sealing strip, and a hot melt adhesive sheet is bonded to the outer surface of the sealing strip.

[0011] As a preferred embodiment of the present invention, the cable connection assembly includes gas-filled cavities disposed on the inner sides of the left and right ends of the cable connection. A multi-hole insulating outer cone is connected to the inner side of the gas-filled cavity of the left end of the cable connection via a slot, and a multi-hole insulating inner cone is connected to the inner side of the gas-filled cavity of the right end of the cable connection via a slot. The multi-hole insulating outer cone and the multi-hole insulating inner cone are connected via a slot. Both the multi-hole insulating outer cone and the multi-hole insulating inner cone are made of insulating rubber. A cable body is connected through the inner side of both the multi-hole insulating outer cone and the multi-hole insulating inner cone. A cable core is disposed inside the cable body. A core connecting sleeve is connected to the middle slot of the cable core, and a sealing sleeve is wrapped around the outside of the core connecting sleeve.

[0012] As a preferred embodiment of the present invention, a gap is left between the porous insulating outer cone, the porous insulating inner cone, and the cable body, and the gap is connected to the gas-filled inner cavity.

[0013] As a preferred embodiment of the present invention, the ultra-high pressure charging environmentally friendly gas regulating component includes a pressure relief vent located on the left side of the cable connector. The pressure relief vent penetrates the gas filling cavity. A top cover is welded to the top of the pressure relief vent. A telescopic spring is installed on the inner side of the top cover. A vent sealing gasket is adhered to the end of the telescopic spring. The vent sealing gasket and the inner side of the pressure relief vent are connected by a slot. The vent sealing gasket and the pressure relief vent are tightly fitted together. A sealing gasket limiting bracket is adhered to the lower side of the vent sealing gasket.

[0014] As a preferred embodiment of the present invention, the sealing gasket limiting frame and the pressure relief and exhaust port are connected by a slot, the sealing gasket limiting frame is made of rigid plastic, and the sealing gasket limiting frame has a hollow structure.

[0015] As a preferred embodiment of the present invention, a miniature electronically controlled air pump is installed on the upper side of the right end of the cable connection. The miniature electronically controlled air pump penetrates the gas filling cavity. A gas tank is threadedly connected to the upper side of the miniature electronically controlled air pump. A pressure sensor is installed on the lower side of the miniature electronically controlled air pump.

[0016] As a preferred embodiment of the present invention, the pressure sensor and the micro electronically controlled air pump are electrically connected, and the micro electronically controlled air pump and the exhaust port sealing gasket form a pressure regulating structure through the gas filling inner cavity.

[0017] As a preferred embodiment of the present invention, the cable fixing and sealing assembly includes a threaded head welded to the outer left side of the left end of the cable connector, a cable sleeve welded to the left side of the left end of the cable connector, a cable sealing gasket adhered to the end of the cable sleeve, a sealing clip connected to the outer side of the cable sealing gasket, the sealing clips being symmetrically arranged vertically and connected by screws, and two sets of the sealing clips being provided, with the cable body passing through the inner side of the cable sleeve and the cable sealing gasket.

[0018] The present invention has the following beneficial effects:

[0019] 1. By setting threaded connectors, spiral sealing grooves, and sealing strips, when needed, after the cable body is connected, the left and right ends of the cable connector are connected to the spiral sealing groove through the threaded connectors, and the sealing strip is inserted into the sealing strip groove. After being baked at high temperature, it is heat-melted and then bonded and sealed. This allows a certain amount of melting reaction to occur on the surface of the sealing strip, so that the sealing strip groove and the outer sealing frame are bonded together, achieving a better sealing effect.

[0020] 2. By setting up a pressure sensor, a gas-filled inner cavity, an exhaust port sealing gasket, and a micro-electrically controlled air pump, when the pressure needs to be adjusted, the pressure sensor monitors in real time, the micro-electrically controlled air pump injects air precisely, the exhaust port sealing gasket ensures a seal, and when the pressure exceeds the preset value, the sealing gasket limit bracket drives the exhaust port sealing gasket to automatically adjust, thereby achieving dynamic balance of pressure and ensuring the safe and stable operation of the equipment.

[0021] 3. By setting up a gas-filled inner cavity, a multi-hole insulating outer cone, and a multi-hole insulating inner cone, when needed, the two cable bodies are connected to the cable cores through the core connecting sleeve. The multi-hole insulating outer cone and the multi-hole insulating inner cone are then wrapped around the outside of the cable core and the core connecting sleeve. At this time, environmentally friendly insulating gas is injected into the gas-filled inner cavity and into the multi-hole insulating outer cone and the multi-hole insulating inner cone, thereby achieving the effect of multiple insulation protection. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of an ultra-high voltage cable intermediate joint filled with environmentally friendly gas proposed in this invention.

[0023] Figure 2 This is a front structural diagram of an ultra-high voltage cable intermediate joint filled with environmentally friendly gas proposed in this invention.

[0024] Figure 3 This is a schematic diagram of the relevant structures for the left end of the cable connection;

[0025] Figure 4 A schematic diagram of the relevant structures for the right end of the cable connection;

[0026] Figure 5 This is a schematic diagram of the overall disassembled structure of an ultra-high voltage cable intermediate joint filled with environmentally friendly gas proposed in this invention.

[0027] Figure 6 A schematic diagram showing the disassembled structure of the cable core, core connecting sleeve, multi-hole insulating outer cone, and multi-hole insulating inner cone;

[0028] Figure 7 A schematic diagram showing the disassembled structure of the cable sealing gasket and sealing clip;

[0029] Figure 8 This is a schematic diagram of the structure from the pressure relief vent to the sealing gasket limit bracket;

[0030] Figure 9 This is a schematic diagram of the structure from the miniature electronically controlled air pump to the air pressure sensor.

[0031] In the diagram: 1. Left end of cable connector; 2. Right end of cable connector; 31. Threaded sleeve; 32. Spiral sealing groove; 33. Sealing gasket; 34. Outer sealing frame; 35. Sealing strip; 36. Threaded connector; 37. Sealing strip groove; 41. Gas-filled inner cavity; 42. Multi-hole insulating outer cone; 43. Multi-hole insulating inner cone; 44. Cable body; 45. Cable core; 46. Core connecting sleeve; 47. Sealing sleeve; 51. Pressure relief vent; 52. Top cover; 53. Telescopic spring; 54. Vent sealing gasket; 55. Sealing gasket limit frame; 56. Miniature electronically controlled air pump; 57. Gas tank; 58. Pressure sensor; 61. Threaded head; 62. Cable sleeve; 63. Cable sealing gasket; 64. Sealing clamp. Detailed Implementation

[0032] 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.

[0033] Reference Figures 1-9 A cable intermediate joint for ultra-high pressure filling with environmentally friendly gas includes a left cable connector 1 and a right cable connector 2 disposed at the right end of the left cable connector 1. A sealing component is disposed on the right side of the left cable connector 1, a cable connection component is disposed on the inner side of the left cable connector 1, an ultra-high pressure filling with environmentally friendly gas adjustment component is disposed on the outer side of the left cable connector 1, and a cable fixing sealing component is disposed on the left side of the left cable connector 1.

[0034] Reference Figure 3 , Figure 4 , Figure 5 The sealing assembly includes a threaded sleeve 31 welded to the inner right end of the left cable connector 1. A spiral sealing groove 32 is provided on the inner side of the threaded sleeve 31, and a sealing gasket 33 is installed on the inner side of the spiral sealing groove 32. An outer sealing frame 34 is welded to the outer side of the threaded sleeve 31, and a sealing strip 35 is provided on the right side of the outer sealing frame 34. A threaded connector 36 is welded to the left side of the right cable connector 2, and a sealing strip groove 37 is provided on the outer side of the threaded connector 36. The threaded connector 36 and the threaded sleeve 31... The connection is threaded. The threaded connector 36 is inserted into the inner side of the spiral sealing groove 32 and sealed by the sealing gasket 33. The left end 1 of the cable connection and the right end 2 of the cable connection are connected to the threaded sleeve 31 through the threaded connector 36. The sealing strip 35 and the outer sealing frame 34 are bonded together. The sealing strip 35 and the sealing strip groove 37 are connected by a slot. The outer sealing frame 34 and the sealing strip groove 37 form a sealing structure through the sealing strip 35. Hot melt adhesive is bonded to the outer surface of the sealing strip 35.

[0035] When needed, the user inserts the cable body 44 between the left end 1 and the right end 2 of the cable connection. Then, the threaded connector 36 connected to the right end 2 of the cable connection is screwed into the spiral sealing groove 32 and fixed to the left end 1 of the cable connection by the threaded sleeve 31. During this process, the sealing groove 37 rotates with the rotation of the right end 2 of the cable connection, causing the sealing strip 35 outside the outer sealing frame 34 to rotate along the sealing groove 37, thereby achieving a compression sealing effect. After the connection is completed, the user uses a baking device to bake the outer sealing frame 34, causing a certain amount of melting reaction on the surface of the sealing strip 35, thereby making the sealing groove 37 and the outer sealing frame 34 stick together, achieving a better sealing effect.

[0036] Reference Figure 3 , Figure 4 , Figure 5 and Figure 6 The cable connection assembly includes gas-filled cavities 41, each disposed inside the left end 1 and right end 2 of the cable connection. A multi-hole insulating outer cone 42 is slotted into the gas-filled cavity 41 of the left end 1, and a multi-hole insulating inner cone 43 is slotted into the gas-filled cavity 41 of the right end 2. The multi-hole insulating outer cone 42 and the multi-hole insulating inner cone 43 are connected by a slot. Both the multi-hole insulating outer cone 42 and the multi-hole insulating inner cone 43 are... The cable body 44 is connected through the inner sides of the porous insulating outer cone 42 and the porous insulating inner cone 43, which are made of insulating rubber. The cable core 45 is provided inside the cable body 44. The cable core 45 is connected to the core connecting sleeve 46 in the middle slot. The core connecting sleeve 46 is wrapped with a sealing rubber sleeve 47. There is a gap between the porous insulating outer cone 42, the porous insulating inner cone 43 and the cable body 44, and the gap is connected to the gas-filled inner cavity 41.

[0037] When needed, insert the two cable bodies 44 into the gas-filled cavities 41 of the left and right cable connectors 1 and 2, respectively. Simultaneously, insert the multi-hole insulated outer cone 42 and the multi-hole insulated inner cone 43 into the gas-filled cavities 41 of the left and right cable connectors 1 and 2, respectively. The cable bodies 44 also pass through the multi-hole insulated outer cone 42 and the multi-hole insulated inner cone 43. The cable cores 45 inside the two cable bodies 44 are first connected and fixed with the core connecting sleeve 46, and then sealed with a sealing sleeve 47. After preparation, connect the left and right cable connectors 1 and 2 together. The multi-hole insulated outer cone 42 and the multi-hole insulated inner cone 43 will be wrapped around the outside of the sealing sleeve 47. At this time, the multi-hole insulated outer cone 42 and the multi-hole insulated inner cone 43 form double insulation protection through their own rubber insulation material properties and the internal gas filling, effectively preventing current leakage and ensuring the safety and stability of the cable connection.

[0038] Reference Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 8 and Figure 9 The ultra-high pressure charging environmentally friendly gas regulating component includes a pressure relief vent 51 located on the upper side of the left end 1 of the cable connection. The pressure relief vent 51 penetrates the gas filling cavity 41. A top cover 52 is welded to the top of the pressure relief vent 51. A telescopic spring 53 is installed on the inner side of the top cover 52. A vent sealing gasket 54 is adhered to the end of each telescopic spring 53. The vent sealing gasket 54 and the inner side of the pressure relief vent 51 are connected by a groove, ensuring a tight fit. A sealing gasket limiting bracket 55 is adhered to the lower side of the vent sealing gasket 54. The sealing gasket limiting bracket 55 and... The pressure relief and exhaust ports 51 are connected by a slot. The sealing gasket limit bracket 55 is made of hard plastic and has a hollow structure. A miniature electronically controlled air pump 56 is installed on the upper side of the right end 2 of the cable connection. The miniature electronically controlled air pump 56 is connected to the gas filling cavity 41. The upper side of the miniature electronically controlled air pump 56 is threaded with a gas tank 57. A pressure sensor 58 is installed on the lower side of the miniature electronically controlled air pump 56. The pressure sensor 58 is electrically connected to the miniature electronically controlled air pump 56. The miniature electronically controlled air pump 56 and the exhaust port sealing gasket 54 form a pressure regulating structure through the gas filling cavity 41.

[0039] When needed, the pressure sensor 58 detects that the internal pressure of the gas-filled cavity 41 is lower than the set threshold. The micro-electrically controlled air pump 56 automatically starts, drawing gas from the gas tank 57 and injecting it into the gas-filled cavity 41 until the pressure returns to the preset range. This ensures that the cable connection maintains a stable gas insulation environment, guaranteeing the reliability and safety of power transmission. When the internal pressure of the gas-filled cavity 41 increases and exceeds the set threshold, the pressure will squeeze the exhaust port sealing gasket 54 in the pressure relief port 51. The exhaust port sealing gasket 54 will then squeeze the telescopic spring 53 in the top cover 52, causing the exhaust port sealing gasket 54 to be squeezed out of the pressure relief port 51 and protruding from the sealing gasket limit frame 55. Excess gas will be discharged through the pressure relief port 51. When the pressure is lower than the preset threshold, the telescopic spring 53 returns to its original position, and the exhaust port sealing gasket 54 re-fits the pressure relief port 51, restoring the sealing state. The sealing gasket limit frame 55 can both limit the pressure and serve as a pressure relief channel, thus ensuring stability after multiple uses.

[0040] Reference Figure 1 , Figure 2 , Figure 5 and Figure 7The cable fixing and sealing assembly includes a threaded head 61 welded to the outer left side of the left end of the cable connector 1. A cable sleeve 62 is welded to the left side of the left end of the cable connector 1. A cable sealing gasket 63 is bonded to the end of the cable sleeve 62. A sealing clip 64 is connected to the outer side of the cable sealing gasket 63 through a groove. The sealing clips 64 are arranged symmetrically at the top and bottom and connected by screws. There are two sets of sealing clips 64. The cable body 44 passes through the inner side of the cable sleeve 62 and the cable sealing gasket 63.

[0041] When needed, when the operator inserts the cable body 44 into the left end 1 of the inner cable connector, the cable body 44 will pass through the cable sealing gasket 63, through the inside of the cable sleeve 62, and then into the left end 1 of the cable connector. After the left end 1 and the right end 2 of the cable connector are connected and fixed, the sealing clip 64 outside the cable sealing gasket 63 is tightened by screws, which compresses and seals the cable sealing gasket 63 to achieve a sealing effect.

[0042] The specific working principle of this invention is as follows:

[0043] When needed, first insert the left and right cable bodies 44 into the left end 1 and right end 2 of the cable connector respectively, then use the core connecting sleeve 46 to connect the cable cores 45 in the cable body 44 in series, then put the sealing sleeve 47 on the outside of the core connecting sleeve 46, bake at high temperature, tighten, and perform initial sealing protection.

[0044] Subsequently, the multi-hole insulating outer cone 42 and multi-hole insulating inner cone 43, which are pre-insulated outside the cable body 44, are inserted into the gas-filled inner cavity 41 inside the left end 1 and right end 2 of the cable connection, respectively. As the operator rotates the right end 2 of the cable connection through the threaded head 61, the threaded connector 36 connected to the right end 2 of the cable connection is screwed into the spiral sealing groove 32 inside the left end 1 of the cable connection, and a sealing gasket 33 seals between the two. The threaded head 31 is used for threaded fixation. At the same time, as the threaded connector 36 rotates, the sealing strip groove 37 also rotates, clamping the sealing strip 35 outside the outer sealing frame 34 between the sealing strip groove 37 and the outer sealing frame 34 for sealing. After sealing, the sealing strip groove 37 is baked by an external high-temperature baking device to slightly melt the sealing strip 35, thereby achieving adhesion and a better sealing effect.

[0045] After the connection is completed, the cable body 44, which passes through the left end 1 and the right end 2 of the cable connection, will first pass through the cable sealing gasket 63 and the cable sleeve 62. At this time, the two sets of sealing clips 64 are tightened with bolts, which, together with the cable sleeve 62, achieves the effect of sealing and tightening.

[0046] Finally, according to the preset air pressure value, the air pressure sensor 58 will sense the air pressure in the gas filling cavity 41. When the air pressure is less than the preset value, the micro electronically controlled air pump 56 will draw environmentally friendly insulating gas from the gas tank 57 and inject it into the gas filling cavity 41. At this time, the environmentally friendly gas will also permeate the porous insulating outer cone 42 and the porous insulating inner cone 43, achieving a multi-layer insulation effect. When the air pressure is greater than the preset value, the air pressure in the gas filling cavity 41 will squeeze the exhaust port sealing gasket 54 in the pressure relief exhaust port 51, squeezing the exhaust port sealing gasket 54 out of the pressure relief exhaust port 51 until the sealing gasket limit frame 55 leaks out. The excess gas will be discharged through the gap outside the sealing gasket limit frame 55. After the air pressure is balanced, the telescopic spring 53 in the top cover 52 will squeeze the exhaust port sealing gasket 54 again, filling the exhaust port sealing gasket 54 back into the pressure relief exhaust port 51 for sealing.

[0047] 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 cable intermediate joint for ultra-high voltage filling with environmentally friendly gas, comprising a left cable connector (1) and a right cable connector (2) disposed at the right end of the left cable connector (1), characterized in that, A sealing component is provided on the right side of the left end (1) of the cable connection, a cable connection component is provided on the inner side of the left end (1) of the cable connection, an ultra-high pressure charging environmental protection gas regulating component is provided on the outer side of the left end (1) of the cable connection, and a cable fixing sealing component is provided on the left side of the left end (1). The sealing assembly includes a threaded sleeve (31) welded to the inner right side of the left end (1) of the cable connector. The inner side of the threaded sleeve (31) is provided with a spiral sealing groove (32). A sealing gasket (33) is installed on the inner side of the spiral sealing groove (32). An outer sealing frame (34) is welded to the outer side of the threaded sleeve (31). A sealing strip (35) is provided on the right side of the outer sealing frame (34). A threaded connector (36) is welded to the left side of the right end (2) of the cable connector. A sealing strip groove (37) is provided on the outer side of the threaded connector (36). The threaded connector (36) and the threaded sleeve (31) are connected by a thread. The threaded connector (36) is inserted into the inner side of the spiral sealing groove (32) and sealed by the sealing gasket (33). The left end (1) of the cable connector and the right end (2) of the cable connector are connected to the threaded sleeve (31) through the threaded connector (36). The sealing strip (35) is bonded to the outer sealing frame (34), and the sealing strip (35) is slotted to the sealing strip groove (37). The outer sealing frame (34) and the sealing strip groove (37) form a sealing structure through the sealing strip (35). Hot melt adhesive is bonded to the outer surface of the sealing strip (35).

2. The cable intermediate joint for ultra-high voltage charging with environmentally friendly gas according to claim 1, characterized in that, The cable connection assembly includes gas-filled cavities (41) located inside the left end (1) and right end (2) of the cable connection. A multi-hole insulating outer cone (42) is connected to the gas-filled cavity (41) of the left end (1) through a slot, and a multi-hole insulating inner cone (43) is connected to the gas-filled cavity (41) of the right end (2). A slot is formed between the multi-hole insulating outer cone (42) and the multi-hole insulating inner cone (43). The connection is made of insulating rubber. The multi-hole insulating outer cone (42) and the multi-hole insulating inner cone (43) are both made of insulating rubber. The inner sides of the multi-hole insulating outer cone (42) and the multi-hole insulating inner cone (43) are connected to the cable body (44). The inner side of the cable body (44) is provided with a cable core (45). The middle slot of the cable core (45) is connected to the core connecting sleeve (46). The outer side of the core connecting sleeve (46) is wrapped with a sealing rubber sleeve (47).

3. The cable intermediate joint for ultra-high voltage charging with environmentally friendly gas according to claim 2, characterized in that, There is a gap between the porous insulating outer cone (42), the porous insulating inner cone (43), and the cable body (44), and the gap is connected to the gas-filled inner cavity (41).

4. The cable intermediate joint for ultra-high voltage filling with environmentally friendly gas according to claim 1, characterized in that, The ultra-high pressure charging environmentally friendly gas regulating component includes a pressure relief vent (51) located on the upper side of the left end (1) of the cable connection. The pressure relief vent (51) penetrates the gas filling cavity (41). A top cover (52) is welded to the top of the pressure relief vent (51). A telescopic spring (53) is installed on the inner side of the top cover (52). A vent sealing gasket (54) is attached to the end of the telescopic spring (53). The vent sealing gasket (54) and the inner side of the pressure relief vent (51) are connected by a slot. The vent sealing gasket (54) and the pressure relief vent (51) are tightly fitted together. A sealing gasket limiting bracket (55) is attached to the lower side of the vent sealing gasket (54).

5. A cable intermediate joint for ultra-high voltage charging with environmentally friendly gas according to claim 4, characterized in that, The sealing gasket limiting frame (55) and the pressure relief vent (51) are connected by a slot. The sealing gasket limiting frame (55) is made of hard plastic and has a hollow structure.

6. The cable intermediate joint for ultra-high voltage filling with environmentally friendly gas according to claim 1, characterized in that, A miniature electronically controlled air pump (56) is installed on the upper side of the right end (2) of the cable connection. The miniature electronically controlled air pump (56) is connected to the gas filling cavity (41). A gas tank (57) is threadedly connected to the upper side of the miniature electronically controlled air pump (56). A pressure sensor (58) is installed on the lower side of the miniature electronically controlled air pump (56).

7. A cable intermediate joint for ultra-high voltage charging with environmentally friendly gas according to claim 6, characterized in that, The pressure sensor (58) is electrically connected to the micro electronically controlled air pump (56), and the micro electronically controlled air pump (56) and the exhaust port sealing gasket (54) form a pressure regulating structure through the gas filling cavity (41).

8. A cable intermediate joint for ultra-high voltage filling with environmentally friendly gas according to claim 1, characterized in that, The cable fixing and sealing assembly includes a threaded head (61) welded to the outer left side of the left end of the cable connector (1). A cable sleeve (62) is welded to the left side of the left end of the cable connector (1). A cable sealing gasket (63) is attached to the end of the cable sleeve (62). A sealing buckle (64) is connected to the outer side of the cable sealing gasket (63) via a slot. The sealing buckles (64) are arranged symmetrically up and down and connected by screws. There are two sets of sealing buckles (64). The cable body (44) passes through the inner side of the cable sleeve (62) and the cable sealing gasket (63).

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