A high temperature resistant cable and its components

Abstract

The present invention relates to the field of cables, and specifically to a high-temperature resistant cable and its components, comprising a metal armored sheath, a braided reinforcement layer wrapped inside the metal armored sheath, a shielding layer wrapped inside the braided reinforcement layer, a high-temperature resistant insulating filling layer arranged inside the shielding layer, and a plurality of conductor cores; an inner conduit having an inner diameter equal to that of the conductor core, through which the conductor core passes; an outer conduit having an inner diameter greater than that of the outer diameter of the inner conduit, through which the inner conduit passes, forming a transmission channel between the outer and inner conduits; a connecting pipe connected between adjacent outer conduits, the connecting pipe being used to interconnect the transmission channels; a pipe plug, and a plurality of branch pipes fixed to the outer surface of the metal armored sheath; one end of the branch pipe being connected to one of the transmission channels. Through this device, sufficient coolant can be introduced into the transmission channel, which can absorb heat when the high-temperature resistant cable is working, effectively reduce the temperature of the conductor core, and ensure the conductive performance of the high-temperature resistant cable.

Description

Technical Field

[0001] The present invention relates to the field of cables, and in particular to a high-temperature resistant cable and a component thereof. Background Art

[0002] High-temperature resistant cables are widely used in national pillar industries such as petroleum, chemical industry, electric power, metallurgy, and major infrastructure projects as transmission lines for electrical appliances, instruments, and automatic control systems in high temperature and harsh environments. The applicant has found that the current fire-resistant cables have good heat resistance, but poor heat dissipation performance. When the cables run in high-temperature environments for a long time, the conductive performance of the cables is affected.

[0003] In the patent with application number CN202122516503.2, the patent name is a soft high-temperature resistant cable with an armored protective layer, which includes an armor layer, an outer sheath, an elastic layer, an inner sheath, and a high-temperature resistant cable. The armor layer, outer sheath, elastic layer, and inner sheath are concentrically arranged from the outside to the inside. The elastic layer is arranged in a wavy shape along its length. The inner diameter of the outer sheath is equal to the maximum outer diameter of the elastic layer, and the outer diameter of the inner sheath is equal to the minimum inner diameter of the elastic layer. The high-temperature resistant cable includes multiple groups arranged evenly and arranged in the inner sheath, and the periphery of each group of high-temperature resistant cables is wrapped with an insulating rubber sleeve. The insulating rubber sleeve arranged on the periphery of the outermost high-temperature resistant cable is tightly arranged with the inner side wall of the inner sheath. The gaps between the groups of high-temperature resistant cables are filled with filling layers. This patent can increase the overall outer surface strength and wear resistance of the cable, and can reduce the bending radius of the cable when bending, and has good flexibility, but does not solve the above technical problems. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to propose a high-temperature resistant cable and its components to solve the problem that the current fire-resistant cable has good heat resistance but poor heat dissipation performance, and the cable runs in a high-temperature environment for a long time, which affects the conductive performance of the cable.

[0005] Based on the above purpose, the present invention provides a high-temperature resistant cable, comprising a metal armored sheath, a braided reinforcement layer coated inside the metal armored sheath, a shielding layer coated inside the braided reinforcement layer, a high-temperature resistant insulating filling layer arranged inside the shielding layer, and a plurality of conductors, the high-temperature resistant cable comprising:

[0006] an inner catheter having an inner diameter equal to that of the guide core, wherein the guide core passes through the inner catheter;

[0007] an outer conduit having an inner diameter larger than an outer diameter of the inner conduit, the inner conduit passing through the outer conduit, a transmission channel being formed between the outer conduit and the inner conduit, and both the outer conduit and the inner conduit being made of insulating material;

[0008] A plurality of push rods are provided between the transmission channels, one end of each push rod is fixed to the outer surface of the inner conduit, and the other end of each push rod is fixed to the inner surface of the outer conduit;

[0009] a communication pipe connected between adjacent outer conduits, the communication pipe being used to connect the transmission channels to each other;

[0010] A pipe plug and a plurality of branch pipes fixed to the outer surface of the metal armored sheath; one end of the branch pipe is connected to one of the transmission channels, and the pipe plug is used to seal the opening of the branch pipe.

[0011] Furthermore, the central axis of the outer conduit, the central axis of the inner conduit, and the central axis of the guide core coincide with each other, and the high temperature resistant cable further comprises:

[0012] an inner ring, wherein the inner diameter of the inner ring is larger than the outer diameter of the inner conduit, and the inner diameter of the outer conduit is larger than the outer diameter of the inner ring, and a through hole is provided in the inner ring, and the through hole passes through the inner side surface and the outer side surface of the inner ring;

[0013] A first push plate and a second push plate are provided in the through hole, wherein the first push plate and the second push plate are both slidably connected to the through hole;

[0014] A driving portion provided between the first push plate and the second push plate, the driving portion being used to drive the first push plate and the second push plate to move away from or toward each other;

[0015] The inner ring is provided with a plurality of first screw holes penetrating through both end surfaces thereof;

[0016] a screw rod matching the first screw hole and a terminal head provided at the top end of the screw rod;

[0017] An outer ring, wherein the outer ring is provided with first through holes penetrating through both end surfaces thereof, wherein the first through holes correspond to the first screw holes in a one-to-one manner;

[0018] When two high-temperature resistant cables are connected to each other, the inner ring is placed inside the opening of the transmission channel, and the first push plate and the second push plate are driven away from each other by the driving unit, so that the outer side surface of the first push plate is against the inner side surface of the outer tube, and the inner side surface of the second push plate is against the outer side surface of the inner tube; then the outer ring is placed at the opening of the transmission channel, and when the screw passes through the first through hole, the screw is rotated so that the screw enters the first screw hole, and through the end head, the outer ring is pushed into the opening of the transmission channel to seal the opening of the transmission channel.

[0019] Furthermore, the driving unit includes:

[0020] at least two inner rods disposed in the through hole, the inner rods being located between the first push plate and the second push plate;

[0021] A second screw hole is provided on one side wall of the through hole, and the second screw hole passes through one end surface of the inner ring; a second through hole is provided on the other side wall of the through hole, and the second through hole passes through the other end surface of the inner ring, and the second through hole is directly opposite to the second screw hole;

[0022] The rotating rod includes a front rod and a rear rod, the side surface of the front rod is provided with a thread, the thread matches the second screw hole, and the side surface of the rear rod is an inclined side surface. In the process of the front rod gradually entering the second screw hole, the inclined side surface pushes the first push plate and the second push plate to separate from each other.

[0023] Here, when the rotating rod passes through the second through hole and the front rod is combined with the second screw hole, the rotating rod is then rotated so that the rear rod gradually enters the through hole. Through the inclined surface, the first push plate and the second push plate are separated from each other, and finally the outer side surface of the first push plate is abutted against the inner side surface of the outer tube, and at the same time, the inner side surface of the second push plate is abutted against the outer side surface of the inner tube.

[0024] Furthermore, the driving part also includes a first spring and a second spring, one end of the first spring is fixed to the inner side surface of the first push plate, and the other end of the first spring is fixed to the side surface of the inner rod, one end of the second spring is fixed to the outer side surface of the second push plate, and the other end of the second spring is fixed to the side surface of the inner rod.

[0025] Furthermore, the inner side surface of the outer conduit is provided with an inner sliding groove corresponding to the first push plate, and the outer side surface of the inner conduit is provided with an outer sliding groove corresponding to the second push plate.

[0026] Furthermore, the bottom of the inner chute is provided with a plurality of inner limiting grooves arranged side by side, and the bottom of the outer chute is provided with a plurality of outer limiting grooves arranged side by side.

[0027] Furthermore, the high temperature resistant cable also includes a flat plate, which is provided with connecting holes running through the front and rear sides thereof, the connecting holes corresponding to the outer conduit, and the diameter of the connecting holes is equal to the outer diameter of the outer conduit.

[0028] Furthermore, the pipe plug is a rotating block, the end surface of the rotating block is provided with a sealing groove, and the inner side wall of the sealing groove is threadedly connected to the outer side surface of the branch pipe.

[0029] Furthermore, the upper end surface of the end head is provided with a cross-shaped groove, and the lower end surface of the end head is provided with a rubber sealing layer.

[0030] The present invention also provides a high-temperature resistant cable assembly, comprising a hydraulic pump, a liquid outlet pipe having one end connected to the outlet of the hydraulic pump, a liquid inlet pipe having one end connected to the inlet of the hydraulic pump, and a drainage pipe. When the high-temperature resistant cable as described above is used, the pipe plug on the branch pipe near one end of the high-temperature resistant cable is removed, and the other end of the liquid outlet pipe is connected to the branch pipe; then the pipe plug on the branch pipe near the other end of the high-temperature resistant cable is removed, and one end of the drainage pipe is connected to the branch pipe; the other end of the liquid inlet pipe is connected to a liquid storage tank filled with coolant.

[0031] The beneficial effects of the present invention are as follows: a high-temperature resistant cable and its components of the present invention are used. Before the cable is connected to the transmission circuit, if a transmission circuit is composed of multiple high-temperature resistant cables, the opening of the transmission channel needs to be sealed at the joint of each high-temperature resistant cable, and then sufficient coolant is passed into the transmission channel through the branch pipe. In this way, when the high-temperature resistant cable is working, it can absorb heat and effectively reduce the temperature of the guide core, thereby ensuring that the guide core can work at a suitable temperature, thereby ensuring the conductive performance of the high-temperature resistant cable. Here, a hydraulic pump can also be configured for each high-temperature resistant cable. The hydraulic pump is connected to the branch pipe near one end of the high-temperature resistant cable through the outlet pipe, and is connected to the liquid storage tank filled with coolant through the inlet pipe. It is also necessary to connect the drainage pipe to the branch pipe near the other end of the high-temperature resistant cable. This drainage pipe can be connected to a temporary storage tank. After the coolant temperature of the temporary storage tank is reduced, the coolant in the temporary storage tank is passed into the storage tank. In this way, after the high-temperature resistant cable is working, the coolant in the transmission channel is in a flowing state, further improving the heat dissipation effect of the high-temperature resistant cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 A front cross-sectional view of an embodiment of the present invention;

[0034] Figure 2 is a side sectional view of an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of the connection between the inner ring and the high-temperature resistant cable in an embodiment of the present invention;

[0036] Figure 4 Schematic diagram of the structure of the first push plate and the second push plate in an embodiment of the present invention;

[0037] Figure 5This is a schematic diagram of the inner chute in an embodiment of the present invention;

[0038] Figure 6 Schematic diagram of the inner and outer chutes in an embodiment of the present invention;

[0039] Figure 7 This is a schematic diagram of the connection between the outer ring and the high-temperature resistant cable in an embodiment of the present invention;

[0040] Figure 8 is a front view of a flat plate according to an embodiment of the present invention;

[0041] Figure 9 is a side sectional view of the inner ring and the outer ring in an embodiment of the present invention;

[0042] Figure 10 A side sectional view of the first push plate and the second push plate in an embodiment of the present invention;

[0043] Figure 11 Schematic diagram of the connection between the hydraulic pump and the high-temperature resistant cable in an embodiment of the present invention.

[0044] The following are marked in the figure:

[0045] 1. Metal armor sheath; 2. Braided reinforcement layer; 3. Shielding layer; 4. High-temperature resistant insulating filling layer; 5. Guide core; 6. Outer conduit; 7. Inner conduit; 8. Push rod; 9. Connecting pipe; 10. Branch pipe; 11. Pipe plug; 12. Inner ring; 13. First screw hole; 14. Through hole; 15. Rotating rod; 16. First push plate; 17. Inner rod; 18. Second push plate; 19. First spring; 20. Second spring; 21. Inner limit groove; 22. Outer limit groove; 23. Inner slide groove; 24. Outer slide groove; 25. Outer ring; 26. End; 27. First through hole; 28. Screw; 29. ​​Second screw hole; 30. Second through hole; 31. Flat plate; 32. Connecting hole; 33. Hydraulic pump. DETAILED DESCRIPTION

[0046] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to specific embodiments.

[0047] It should be noted that, unless otherwise defined, the technical or scientific terms used in the present invention should have the usual meanings understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0048] The first aspect of the present invention provides a high temperature resistant cable and its components, such as Figure 1 、 Figure 2 As shown, it includes a metal armored sheath 1, a braided reinforcement layer 2 wrapped inside the metal armored sheath 1, a shielding layer 3 wrapped inside the braided reinforcement layer 2, a high-temperature resistant insulating filling layer 4 arranged in the shielding layer 3, and a plurality of conductors 5. The high-temperature resistant cable includes:

[0049] an inner catheter 7 having an inner diameter equal to that of the guide core 5 , wherein the guide core 5 passes through the inner catheter 7 ;

[0050] an outer conduit 6 having an inner diameter larger than an outer diameter of the inner conduit 7, the inner conduit 7 passing through the outer conduit 6, a transmission channel being formed between the outer conduit 6 and the inner conduit 7, and both the outer conduit 6 and the inner conduit 7 being made of insulating material;

[0051] A plurality of push rods 8 are provided between the transmission channels, one end of each push rod 8 is fixed to the outer surface of the inner conduit 7, and the other end of each push rod 8 is fixed to the inner surface of the outer conduit 6;

[0052] a connecting pipe 9 connected between adjacent outer conduits 6, the connecting pipe 9 being used to connect the transmission channels to each other;

[0053] A pipe plug 11 and a plurality of branch pipes 10 fixed to the outer surface of the metal armored sheath 1 ; one end of the branch pipe 10 is connected to one of the transmission channels, and the pipe plug 11 is used to seal the opening of the branch pipe 10 .

[0054] In this embodiment, before the cable is connected to the transmission circuit, if a transmission circuit is composed of multiple high-temperature resistant cables, the opening of the transmission channel needs to be sealed at the joint of each high-temperature resistant cable, and then sufficient coolant is passed into the transmission channel through the branch pipe 10. In this way, when the high-temperature resistant cable is working, it can absorb heat and effectively reduce the temperature of the guide core 5, thereby ensuring that the guide core 5 can work at a suitable temperature, thereby ensuring the conductive performance of the high-temperature resistant cable. Here, water can be selected as the coolant. After the high-temperature resistant cable has been working for a period of time, the water in the transmission channel can be replaced to achieve a better cooling effect.

[0055] As an implementation method, Figure 3 、 Figure 4 、 Figure 6 、 Figure 7 、 Figure 9 As shown, the central axis of the outer conduit 6, the central axis of the inner conduit 7 and the central axis of the guide core 5 coincide with each other, and the high temperature resistant cable further includes:

[0056] An inner ring 12, wherein the inner diameter of the inner ring 12 is larger than the outer diameter of the inner conduit 7, and the inner diameter of the outer conduit 6 is larger than the outer diameter of the inner ring 12, and a through hole 14 is provided in the inner ring 12, and the through hole 14 passes through the inner side and the outer side of the inner ring 12;

[0057] A first push plate 16 and a second push plate 18 are provided in the through hole, and the first push plate 16 and the second push plate 18 are both slidably connected to the through hole 14;

[0058] A driving portion provided between the first push plate 16 and the second push plate 18, the driving portion being used to drive the first push plate 16 and the second push plate 18 away from or towards each other;

[0059] The inner ring 12 is provided with a plurality of first screw holes 13 penetrating through both end surfaces thereof;

[0060] a screw rod 28 matching the first screw hole 13 and a terminal 26 provided at the top end of the screw rod 28;

[0061] The outer ring 25 is provided with first through holes 27 passing through both end surfaces thereof, and the first through holes 27 correspond to the first screw holes 13 in a one-to-one manner.

[0062] In this embodiment, when two high-temperature resistant cables need to be connected together, first tear open the ends of the two high-temperature resistant cables to release the guide core 5. Before the corresponding guide cores 5 are connected together, the inner ring 12 is placed inside the opening of the transmission channel. Then, through the driving part, the first push plate 16 and the second push plate 18 are moved away from each other, and finally the outer side surface of the first push plate 16 is abutted against the inner side surface of the outer tube 6, and the inner side surface of the second push plate 18 is abutted against the outer side surface of the inner tube 7. In this way, the inner ring 12 will be fixed inside the transmission channel. Then the outer ring 25 is placed at the opening of the transmission channel. After the screw 28 passes through the first through hole 27, the screw 28 is rotated so that the screw 28 enters the first screw hole 13, and through the end head 26, the outer ring 25 is pushed into the opening of the transmission channel to seal the opening of the transmission channel. This can ensure that the coolant will not leak after passing through the transmission channel. After completion, the guide cores 5 corresponding to the two high-temperature resistant cables are connected together.

[0063] As an implementation method, Figure 2 、 Figure 3 、 Figure 10 As shown, the driving unit includes:

[0064] At least two inner rods 17 are provided in the through hole 14 , and the inner rods 17 are located between the first push plate 16 and the second push plate 18 ;

[0065] A second screw hole 29 is formed on one side wall of the through hole 14, and the second screw hole 29 passes through one end surface of the inner ring 12; a second through hole 30 is formed on the other side wall of the through hole 14, and the second through hole 30 passes through the other end surface of the inner ring 12, and the second through hole 30 is opposite to the second screw hole 29;

[0066] The rotating rod 15 includes a front rod and a rear rod. The side surface of the front rod is provided with a thread, and the thread matches the second screw hole 29. The side surface of the rear rod is an inclined side surface. In the process of the front rod gradually entering the second screw hole 29, the inclined side surface pushes the first push plate 16 and the second push plate 18 to separate from each other.

[0067] In this embodiment, when the rotating rod 15 passes through the second through hole 30 and the front rod is combined with the second screw hole 29, the rotating rod 15 is rotated so that the rear rod gradually enters the through hole 14, the first push plate 16 and the second push plate 18 are separated from each other through the inclined surface, and finally the outer side surface of the first push plate 16 is abutted against the inner side surface of the outer tube 6, and the inner side surface of the second push plate 18 is abutted against the outer side surface of the inner tube 7.

[0068] As an implementation method, Figure 3 、 Figure 4As shown, the driving part also includes a first spring 19 and a second spring 20, one end of the first spring 19 is fixed to the inner side surface of the first push plate 16, and the other end of the first spring 19 is fixed to the side surface of the inner rod 17, one end of the second spring 20 is fixed to the outer side surface of the second push plate 18, and the other end of the second spring 20 is fixed to the side surface of the inner rod 17.

[0069] Here, when the rotating rod 15 does not pass through the through hole 14, the first spring 19 and the second spring 20 can be used to ensure that when the inner ring 12 is placed in the opening of the transmission channel, there is a distance between the first push plate 16 and the inner side surface of the outer tube 6 and between the second push plate 18 and the inner side surface of the inner tube 7, making the placement process simpler.

[0070] As an implementation method, Figure 4 、 Figure 5 、 Figure 6 As shown, the inner side surface of the outer conduit 6 is provided with an inner sliding groove 23 corresponding to the first push plate 16 , and the outer side surface of the inner conduit 7 is provided with an outer sliding groove 24 corresponding to the second push plate 18 .

[0071] Here, when the rotating rod 15 has not entered the through hole 14, a portion of the first push plate 16 and the second push plate 18 extends to the outside of the through hole 14. The portion of the first push plate 16 extending to the outside is called the first extension portion, and the portion of the second push plate 18 extending to the outside is called the second extension portion. In this way, when the inner ring 12 is placed in the transmission channel, the first extension portion can be aligned with the inner slide groove 23, and the second extension portion can be aligned with the outer slide groove 24, which is more convenient to use.

[0072] As an implementation method, Figure 4 、 Figure 5 、 Figure 6 As shown, a plurality of inner limiting grooves 21 arranged side by side are provided at the bottom of the inner sliding groove 23 , and a plurality of outer limiting grooves 22 arranged side by side are provided at the bottom of the outer sliding groove 24 .

[0073] Here, when the rotating rod 15 causes the first push plate 16 and the second push plate 18 to move away from each other, the first extension portion enters one of the inner limit grooves 21, and the second extension portion enters one of the outer limit grooves 22, thereby ensuring that the inner ring 12 is more stable in the transmission channel.

[0074] As an implementation method, Figure 8 As shown, the high temperature resistant cable further includes a flat plate 31 , which is provided with a connecting hole 32 running through its front and rear sides. The connecting hole 32 corresponds to the outer conduit 6 , and the diameter of the connecting hole 32 is equal to the outer diameter of the outer conduit 6 .

[0075] Here, before the corresponding guide core 5 is connected, the guide core 5 and the inner conduit 7 and outer conduit 6 corresponding to the guide core 5 can be passed through the corresponding connecting hole 32 first, so that when the inner ring 12 and the outer ring 25 are installed, the interference of another guide core 5 can be reduced.

[0076] In addition, preferably, Figure 2 As shown, the pipe plug 11 is a rotating block, and a sealing groove is provided on the end surface of the rotating block. The inner side wall of the sealing groove is threadedly connected to the outer side surface of the branch pipe 10.

[0077] You can also Figure 7 As shown, the upper end surface of the end head 26 is provided with a cross-shaped groove, and external force can be applied by a cross-head screwdriver, which is very convenient. The lower end surface of the end head 26 is provided with a rubber sealing layer to play a sealing role.

[0078] Here we also introduce a high temperature resistant cable assembly, specifically Figure 11 As shown, it includes a hydraulic pump 33, a liquid outlet pipe with one end connected to the outlet of the hydraulic pump 33, a liquid inlet pipe with one end connected to the inlet of the hydraulic pump 33, and a drainage pipe. When the high-temperature resistant cable as described above is used, the pipe plug 11 on the branch pipe 10 near one end of the high-temperature resistant cable is removed, and the other end of the liquid outlet pipe is connected to the branch pipe 10; then the pipe plug 11 on the branch pipe 10 near the other end of the high-temperature resistant cable is removed, and one end of the drainage pipe is connected to the branch pipe 10; the other end of the liquid inlet pipe is connected to a liquid storage tank filled with coolant.

[0079] In this embodiment, a hydraulic pump 33 can be configured for each high-temperature resistant cable. The hydraulic pump 33 is connected to the branch pipe 10 near one end of the high-temperature resistant cable through the liquid outlet pipe, and is connected to the liquid storage tank filled with coolant through the liquid inlet pipe. It is also necessary to connect the drainage pipe to the branch pipe 10 near the other end of the high-temperature resistant cable. This drainage pipe can be connected to a temporary storage tank. After the temperature of the coolant in the temporary storage tank is lowered, the coolant in the temporary storage tank is passed into the liquid storage tank. In this way, after the high-temperature resistant cable is working, the coolant in the transmission channel is in a flowing state, further improving the heat dissipation effect of the high-temperature resistant cable.

[0080] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0081] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-temperature resistant cable, comprising a metal armored sheath (1), a braided reinforcement layer (2) wrapped inside the metal armored sheath (1), a shielding layer (3) wrapped inside the braided reinforcement layer (2), a high-temperature resistant insulating filling layer (4) arranged inside the shielding layer (3), and a plurality of conductors (5), characterized in that: The high-temperature resistant cable comprises: an inner conduit (7) having an inner diameter equal to the diameter of the guide core (5), the guide core (5) passing through the inner conduit (7); an outer conduit (6) having an inner diameter greater than the outer diameter of the inner conduit (7), the inner conduit (7) passing through the outer conduit (6), a transmission channel being formed between the outer conduit (6) and the inner conduit (7), and both the outer conduit (6) and the inner conduit (7) being made of insulating material; a plurality of push rods (8) arranged between the transmission channels, one end of the push rod (8) being fixed to the outer surface of the inner conduit (7), and the other end of the push rod (8) being fixed to the inner surface of the outer conduit (6); a connecting pipe (9) connected between adjacent outer conduits (6), the connecting pipe (9) being used to interconnect the transmission channels; a pipe plug (11), and a plurality of branch pipes (10) fixed to the outer surface of the metal armored sheath (1); one end of the branch pipe (10) being connected to one of the transmission channels, and the pipe plug (11) being used to seal the opening of the branch pipe (10); The central axis of the outer conduit (6), the central axis of the inner conduit (7) and the central axis of the guide core (5) coincide with each other, and the high-temperature resistant cable further comprises: an inner ring (12), the inner diameter of the inner ring (12) is larger than the outer diameter of the inner conduit (7), and the inner diameter of the outer conduit (6) is larger than the outer diameter of the inner ring (12), and a through hole (14) is provided in the inner ring (12), and the through hole (14) passes through the inner side and the outer side of the inner ring (12); The first push plate (16) and the second push plate (18) are both slidably connected to the through hole (14); a driving part is provided between the first push plate (16) and the second push plate (18), and the driving part is used to drive the first push plate (16) and the second push plate (18) to move away from or approach each other; the inner ring (12) is provided with a plurality of first screw holes (13) passing through its two end faces; a screw rod (28) matching the first screw hole (13) and an end head (26) provided at the top end of the screw rod (28); an outer ring (25), the outer ring (25) is provided with a first through hole (27) passing through its two end faces, and the first through hole (27) corresponds to the first screw hole (13) one by one; when two high temperature resistant cables are connected to each other, the inner ring (12) is placed inside the opening of the transmission channel, and the first push plate (16) and the second push plate (18) are driven away from each other by the driving part, so that the first push plate (16) ) is pressed against the inner side of the outer conduit (6), and at the same time, the inner side of the second push plate (18) is pressed against the outer side of the inner conduit (7); then, the outer ring (25) is placed at the opening of the transmission channel, and after the screw (28) passes through the first through hole (27), the screw (28) is rotated so that the screw (28) enters the first screw hole (13), and pushes the outer ring (25) into the opening of the transmission channel through the end head (26), thereby sealing the opening of the transmission channel.

2. A high temperature resistant cable according to claim 1, characterized in that: The driving part comprises: at least two inner rods (17) arranged in the through hole (14), the inner rod (17) being located between the first push plate (16) and the second push plate (18); one side wall of the through hole (14) being provided with a second screw hole (29), the second screw hole (29) penetrating one end face of the inner ring (12); the other side wall of the through hole (14) being provided with a second through hole (30), the second through hole (30) penetrating the other end face of the inner ring (12), and the second through hole (30) being opposite to the second screw hole (29); a rotating rod (15), the rotating rod (15) comprising a front rod and a rear rod, the side surface of the front rod being provided with a thread, the thread matching the second screw hole (29), the side surface of the rear rod being an inclined side surface, and in the process of the front rod gradually entering the second screw hole (29), the inclined side surface pushes the first push plate (16) and the second push plate (18) to separate from each other.

3. A high temperature resistant cable according to claim 2, characterized in that: The driving portion further includes a first spring (19) and a second spring (20), one end of the first spring (19) being fixed to the inner side surface of the first push plate (16), and the other end of the first spring (19) being fixed to the side surface of the inner rod (17), one end of the second spring (20) being fixed to the outer side surface of the second push plate (18), and the other end of the second spring (20) being fixed to the side surface of the inner rod (17).

4. A high temperature resistant cable according to claim 3, characterized in that: The inner side surface of the outer conduit (6) is provided with an inner slide groove (23) corresponding to the first push plate (16), and the outer side surface of the inner conduit (7) is provided with an outer slide groove (24) corresponding to the second push plate (18).

5. A high temperature resistant cable according to claim 4, characterized in that: The bottom of the inner slide groove (23) is provided with a plurality of inner limiting grooves (21) arranged side by side, and the bottom of the outer slide groove (24) is provided with a plurality of outer limiting grooves (22) arranged side by side.

6. A high temperature resistant cable according to claim 5, characterized in that: The high-temperature resistant cable further comprises a flat plate (31), the flat plate (31) being provided with a connection hole (32) penetrating the front and rear sides thereof, the connection hole (32) corresponding to the outer conduit (6), and the diameter of the connection hole (32) being equal to the outer diameter of the outer conduit (6).

7. A high temperature resistant cable according to claim 6, characterized in that: The pipe plug (11) is a rotating block, and a sealing groove is provided on the end surface of the rotating block. The inner side wall of the sealing groove is threadedly connected to the outer side surface of the branch pipe (10).

8. A high temperature resistant cable according to claim 7, characterized in that: The upper end surface of the end head (26) is provided with a cross-shaped groove, and the lower end surface of the end head (26) is provided with a rubber sealing layer.

9. A high temperature resistant cable assembly, characterized in that: The high-temperature resistant cable assembly includes a hydraulic pump (33), a liquid outlet pipe having one end connected to the outlet of the hydraulic pump (33), a liquid inlet pipe having one end connected to the inlet of the hydraulic pump (33), and a drainage pipe. The pipe plug (11) on the branch pipe (10) near one end of the high-temperature resistant cable according to any one of claims 1 to 8 is removed, and the other end of the liquid outlet pipe is connected to the branch pipe (10); then the pipe plug (11) on the branch pipe (10) near the other end of the high-temperature resistant cable is removed, and one end of the drainage pipe is connected to the branch pipe (10); the other end of the liquid inlet pipe is connected to a liquid storage tank filled with coolant.

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