Fireproof control cable

Abstract

The invention belongs to the field of control cables, and particularly relates to a fire-resistant control cable which comprises a cable core. The cable comprises seven groups of cable cores, inner insulating layers are fixedly connected to the outer sides of the seven groups of cable cores, inner shielding layers are wound on the outer sides of the inner insulating layers, the cable cores, the inner insulating layers and the inner shielding layers are uniformly distributed in a filling material in a circumferential array shape, an outer shielding layer is fixedly connected to the outer side of the filling material, and the outer shielding layer is wound on the outer side of the outer shielding layer. The outer side of the outer shielding layer is fixedly connected with an outer insulating layer, the outer side of the outer insulating layer is fixedly connected with an isolating layer, the outer side of the isolating layer is fixedly connected with eight groups of main outer linings, and an auxiliary outer lining is arranged between every two groups of main outer linings; the auxiliary outer lining is also fixedly connected to the outer side of the isolating layer; the problems that an existing control cable is prone to being ignited when encountering open fire or high temperature, flames spread continuously along the cable, the whole device is burnt out, and even fire disasters are caused are solved.

Description

Technical Field

[0001] The invention relates to the field of control cables, in particular to a fire-resistant control cable. Background Art

[0002] Control cables are key transmission components in automation equipment, responsible for transmitting signals to control the operation of machines. Control cables must be able to withstand harsh conditions such as extreme temperatures, chemical exposure, moisture and humidity in industrial environments.

[0003] For the existing control cable, the Chinese patent with the publication number CN104051066B can be specifically referred to, which discloses a high-strength control cable in detail. The cable is composed of a first core, a conductive layer arranged on the outer surface of the first core, and a first insulating layer wrapped outside the conductive layer to form an intermediate core; an isolation layer is arranged outside the intermediate core, and a left core composed of two second cores intertwined with each other is arranged between the intermediate core and the isolation layer, and core isolation layers are arranged on the outer surfaces of the two second cores respectively, and the outer surfaces of the two second cores intertwined with each other are provided with a first insulating layer, wherein the two second cores intertwined with each other wrapped by the first insulating layer form an "8"-shaped structure. The addition of ceramic components makes the cable have good mechanical properties, improves the strength of the cable, effectively reduces mechanical damage, and prolongs the service life of the cable; the interaction between nickel oxide and lithium-based bentonite can effectively improve the anti-aging properties of the polymer material components ethyl tert-butyl ether and methacrylic acid, and further prolongs the service life of the cable.

[0004] Although the above-mentioned control cable can effectively reduce mechanical damage, the cable is easily ignited when encountering open flame or high temperature, which causes the flame to continue to spread along the cable, causing the entire equipment to be burned or even causing a fire; therefore, a fire-resistant control cable is proposed to address the above problem. Summary of the invention

[0005] In order to solve the problem that the existing control cables are easily ignited when encountering open flames or high temperatures, which causes the flames to continue to spread along the cables, resulting in the entire equipment being burned or even causing a fire, the present invention proposes a fire-resistant control cable.

[0006] The technical solution adopted by the present invention to solve its technical problem is: the fire-resistant control cable described in the present invention comprises a cable core; the cable core is provided in seven groups, and the outer sides of the seven groups of the cable cores are all fixedly connected with an inner insulating layer, the outer side of the inner insulating layer is wound with an inner shielding layer, the cable core, the inner insulating layer and the inner shielding layer are uniformly distributed inside the filler in a circular array, the outer side of the filler is fixedly connected with an outer shielding layer, the outer side of the outer shielding layer is fixedly connected with an outer insulating layer, the outer side of the outer insulating layer is fixedly connected with an isolation layer, the outer side of the isolation layer is fixedly connected with a main outer bushing, the main outer bushing is provided in eight groups, and a secondary outer bushing is provided between every two groups of the main outer bushings, and the secondary outer bushing is also fixedly connected to the outer side of the isolation layer; The outer sides of the main outer bushing and the auxiliary outer bushing are provided with fixing mechanisms, and the fixing mechanisms are used to fix the entire cable at a designated position according to a preset manner.

[0007] Preferably, the inner shielding layer is made of copper foil, the filler is made of magnesium hydroxide, the outer shielding layer is made of aluminum foil, the outer insulating layer is made of flame-retardant polyvinyl chloride, the isolation layer is made of aromatic sulfone, the main outer sleeve is made of cross-linked polyethylene, and the secondary outer sleeve is made of ceramic fiber.

[0008] Preferably, the fixing mechanism includes a base, an upper card plate is provided at the top of the base, a lower gasket is glued to the inner wall of the base, a lateral fitting fixing component is provided between the top of the base and the bottom end of the upper card plate, the lower gasket is made of halogen-free flame-retardant silicone rubber, and an auxiliary fire extinguishing component is provided on the upper card plate.

[0009] Preferably, the auxiliary fire extinguishing assembly includes a movable plate, which is slidably connected to the interior of the movable cavity, and the movable cavity is opened on the upper clamping plate, and the movable plate is fixedly connected with a rack, the rack is meshed with a transmission gear, the transmission gear is rotatably connected to the inner wall of the movable cavity, and the transmission gear is also meshed with a baffle, and the baffle is slidably connected to the interior of the movable cavity, a storage groove is opened on one side of the movable cavity, the interior of the storage groove is filled with dry powder fire extinguishing agent, and an isolation film is glued to the side of the dry powder fire extinguishing agent away from the inner wall of the storage groove, a sliding groove is opened on one side of the movable plate, a sliding rod is fixedly connected to the interior of the sliding groove, and a sliding block is slidably connected to the outer side of the sliding rod, and the sliding block is fixedly connected to the inner wall of the movable cavity, and a third spring is wound around the outer side of the sliding rod, one end of the third spring is fixedly connected to the top of the inner wall of the sliding groove, and the other end of the third spring is fixedly connected to the sliding block.

[0010] Preferably, the lateral fitting fixing assembly includes an insert block, the insert block is fixedly connected to both sides of the bottom end of the upper card plate, and the insert block is inserted into the inside of the slot, the slot is opened at the top of the base, a storage cavity is opened on one side of the insert block, the storage cavity is internally slidably connected with a limit block, the limit block is engaged with the limit slot, the limit slot is opened on both sides of the base, a first spring is also arranged inside the storage cavity, a release assembly is arranged at the bottom end of the limit slot, the side of the insert block away from the release assembly is in contact with the rotating plate, the front and rear ends of the rotating plate are rotatably connected to the inner wall of the movable slot, and a torsion spring is also arranged between the front and rear ends of the rotating plate and the inner wall of the movable slot, the side of the rotating plate away from the insert block is fixedly connected to a side gasket, and the side gasket is made of halogen-free flame-retardant silicone rubber.

[0011] Preferably, a side of the first spring close to the limit block is fixedly connected to the limit block, and a side of the first spring away from the limit block is fixedly connected to the inner wall of the storage cavity.

[0012] Preferably, a sliding block is fixedly connected to the top of the limiting block, the sliding block is slidably connected to the inside of the sliding groove, and the sliding groove is opened at the top of the storage cavity.

[0013] Preferably, one end of the torsion spring close to the rotating plate is fixedly connected to the rotating plate, and one end of the torsion spring away from the rotating plate is fixedly connected to the inner wall of the movable groove.

[0014] Preferably, the release assembly includes a push block, which is slidably connected to the inside of the limiting groove, a sliding rod is fixedly connected to the inner wall of the push block, a sliding block is slidably connected to the outer side of the sliding rod, the sliding block is fixedly connected to the inner wall of the limiting groove, and a second spring is also wrapped around the outer side of the sliding rod.

[0015] Preferably, the top end of the second spring is fixedly connected to the sliding block, and the bottom end of the second spring is fixedly connected to the inner wall of the pushing block.

[0016] The present invention is beneficial in that: 1. The present invention uses a filler made of magnesium hydroxide to achieve flame retardant and heat-insulating effects. When the filler is heated, it chemically decomposes to absorb heat and release water to achieve flame retardant effects. While being able to effectively retard flames, it also has non-toxic and low-smoke properties. The outer shielding layer made of aluminum foil has the effect of shielding external electromagnetic interference. The inner shielding layer made of copper foil has the effect of shielding electromagnetic interference between seven groups of inner insulating layers. The outer shielding layer made of flame-retardant polyvinyl chloride has the effect of keeping the cable soft while enhancing the insulation performance, weather resistance and flame retardant performance of the cable. The outer shielding layer made of aromatic sulfone fiber has the effect of shielding electromagnetic interference between seven groups of inner insulating layers. The insulating layer of the material further enhances the mechanical strength and flame retardant and fire resistant performance of the cable as a whole; it also has good dyeability, electrical insulation and chemical corrosion resistance. By using a combination of a main outer sleeve made of cross-linked polyvinyl chloride and a secondary outer sleeve made of ceramic fiber on the outside of the cable as a whole, the wear resistance, weather resistance and high temperature resistance of the cable as a whole are enhanced while maintaining the overall softness of the cable, solving the problem that the existing control cable is easily ignited when encountering open flames or high temperatures, which causes the flame to continue to spread along the cable, causing the entire equipment to be burned or even causing a fire; 2. The present invention realizes the function of conveniently installing the control cable as a whole on the outside of the equipment through the structural design of the fixing mechanism, and conveniently bending and controlling the control cable, thereby solving the problem in the prior art that the control cable is damaged by falling, entanglement, knotting or excessive bending due to the lack of effective fixing of the control cable after the control cable is connected; 3. The present invention realizes the function of automatically clamping and fixing the two sides of the control cable when the base and the upper clamping plate are connected through the structural design of the lateral fitting fixing component, thereby solving the problem that the existing control cable fixation still needs manual adjustment of the size to match the control cable, which leads to low installation efficiency of the control cable, thereby improving the installation efficiency of the control cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a partial front view cross-sectional structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of a first partial front view cross-sectional three-dimensional structure of the present invention; Figure 4For the present invention Figure 3 The enlarged structural diagram at A in the middle; Figure 5 It is a schematic diagram of a second partial front view cross-sectional three-dimensional structure of the present invention; Figure 6 It is a schematic diagram of a first partial explosion structure of the present invention; Figure 7 It is a schematic diagram of a partial three-dimensional structure of the present invention; Figure 8 It is a schematic diagram of a second partial explosion structure of the present invention.

[0019] In the figure: 1, cable core; 21, inner insulating layer; 22, inner shielding layer; 23, filling material; 24, outer shielding layer; 25, outer insulating layer; 26, isolation layer; 27, main outer bushing; 28, auxiliary outer bushing; 29, base; 30, upper card plate; 31, lower gasket; 33, plug block; 34, slot; 35, storage cavity; 36, limit block; 37, limit groove; 38, first spring; 39, slider; 40. Slide groove; 41. Push block; 42. Slide rod; 43. Slide block; 44. Second spring; 45. Rotating plate; 46. Side gasket; 47. Movable groove; 48. Torsion spring; 49. Movable plate; 50. Movable cavity; 51. Rack; 52. Transmission gear; 53. Baffle; 54. Storage tank; 55. Dry powder fire extinguishing agent; 56. Slide groove; 57. Slide rod; 58. Slide block; 59. Third spring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0021] See also Figure 1-Figure 8As shown, a fire-resistant control cable comprises a cable core 1; the cable core 1 is provided with seven groups, and the outer sides of the seven groups of cable cores 1 are all fixedly connected with an inner insulating layer 21, the outer side of the inner insulating layer 21 is wound with an inner shielding layer 22, the cable core 1, the inner insulating layer 21 and the inner shielding layer 22 are uniformly distributed inside a filler 23 in a circumferential array, the outer side of the filler 23 is fixedly connected with an outer shielding layer 24, the outer side of the outer shielding layer 24 is fixedly connected with an outer insulating layer 25, and the outer side of the outer insulating layer 25 is fixedly connected with an isolation layer 26 , the outside of the isolation layer 26 is fixedly connected with a main outer bushing 27, eight groups of the main outer bushings 27 are provided, and a secondary outer bushing 28 is provided between every two groups of the main outer bushings 27, and the secondary outer bushing 28 is also fixedly connected to the outside of the isolation layer 26, the inner shielding layer 22 is made of copper foil, the filler 23 is made of magnesium hydroxide, the outer shielding layer 24 is made of aluminum foil, the outer insulating layer 25 is made of flame-retardant polyvinyl chloride, the isolation layer 26 is made of aromatic sulfone, the main outer bushing 27 is made of cross-linked polyethylene, and the secondary outer bushing 28 is made of ceramic fiber; During operation, the filler 23 made of magnesium hydroxide has a flame retardant and heat-insulating effect. When the filler 23 is heated, it chemically decomposes to absorb heat and release water to play a flame retardant role. While being able to effectively flame retardant, it also has non-toxic and low-smoke characteristics. The outer shielding layer 24 made of aluminum foil has an effect of shielding external electromagnetic interference. The inner shielding layer 22 made of copper foil has an effect of shielding the electromagnetic interference between the seven groups of inner insulating layers 21. The outer shielding layer 24 made of flame-retardant polyvinyl chloride keeps the cable soft while enhancing the insulation performance, weather resistance and flame retardancy of the cable. The isolation layer 26 made of aromatic sulfone further enhances the mechanical strength and flame retardancy of the cable as a whole. It also has good dyeability, electrical insulation and chemical corrosion resistance. The main outer bushing 27 made of cross-linked polyvinyl chloride and the auxiliary outer bushing 28 made of ceramic fiber are combined on the outer side of the cable as a whole to enhance the wear resistance, weather resistance and high temperature resistance of the cable as a whole while maintaining the overall softness of the cable.

[0022] Furthermore, the fixing mechanism includes a base 29, an upper card plate 30 is provided at the top of the base 29, a lower gasket 31 is glued to the inner wall of the base 29, a lateral fitting fixing component is provided between the top of the base 29 and the bottom of the upper card plate 30, the lower gasket 31 is made of halogen-free flame-retardant silicone rubber, and the lateral fitting fixing component includes an insert block 33, the insert block 33 is fixedly connected to both sides of the bottom end of the upper card plate 30, and the insert block 33 is inserted into the inside of the slot 34, the slot 34 is opened at the top of the base 29, a storage cavity 35 is opened on one side of the insert block 33, the storage cavity 35 is internally slidably connected to a limiting block 36, the limiting block 36 is engaged with a limiting groove 37, the limiting groove 37 is opened on both sides of the base 29, a first spring 38 is further provided inside the storage cavity 35, and a release is provided at the bottom of the limiting groove 37 In addition to the assembly, the side of the plug block 33 away from the release assembly abuts against the rotating plate 45, the front and rear ends of the rotating plate 45 are rotatably connected to the inner wall of the movable groove 47, and a torsion spring 48 is also provided between the front and rear ends of the rotating plate 45 and the inner wall of the movable groove 47, and the side of the rotating plate 45 away from the plug block 33 is fixedly connected with a side gasket 46, the side gasket 46 is made of halogen-free flame-retardant silicone rubber, the side of the first spring 38 close to the limit block 36 is fixedly connected to the limit block 36, and the side of the first spring 38 away from the limit block 36 is fixedly connected to the inner wall of the storage chamber 35, and the fixing mechanism can also play the effect of blocking the spread of fire, and the side gasket 46 and the lower gasket 31 made of halogen-free flame-retardant silicone rubber can effectively block the flame and prevent the fire from spreading along the control cable; During operation, when the control cable is fixed as a whole, the control cable is first placed on the top of the base 29 so that the bottom end of the control cable fits in with the lower gasket 31, and then the plug block 33 fixedly connected to the bottom end of the upper clamping plate 30 is aligned with the slot 34, and then the plug block 33 is inserted into the inside of the slot 34. When the plug block 33 is inserted into the inside of the slot 34, the inclined surface at the bottom end of the plug block 33 contacts the rotating plate 45, and pushes the rotating plate 45 and the side gasket 46 to move to both sides of the control cable as a whole. As the plug block 33 is gradually inserted into the inside of the slot 34, the rotating plate 45 and the side gasket 46 are gradually aligned with the sides of the control cable as a whole. When the plug block 33 is fully inserted into the slot 34, the rotating plate 45 and the side gasket 46 are pushed to fit tightly with the outer side of the control cable as a whole. At this time, the friction force of the lower gasket 31 and the limit block 36 is combined to limit the sliding of the control cable as a whole, thereby preventing the control cable from shaking during operation. When the rotating plate 45 is squeezed and rotated by the plug block 33, the torsion spring 48 connected to it is torsionally twisted to produce elastic deformation. When the rotating plate 45 loses the squeezing of the plug block 33, the rotating plate 45 drives the rotating plate 45 and the side gasket 46 to return to their original positions under the restoring force of the torsion spring 48. When the insert block 33 is inserted into the slot 34, the inner wall of the slot 34 squeezes the inclined surface at the bottom end of the limit block 36, so that the limit block 36 moves toward the inside of the storage chamber 35 under the action of the squeezing force, and squeezes the first spring 38, causing the first spring 38 to elastically deform. When the insert block 33 is fully inserted into the slot 34, the squeezing force of the inner wall of the slot 34 on the limit block 36 disappears. At this time, the limit block 36 returns to its original position under the action of the restoring force of the first spring 38, and is inserted into the inside of the limit groove 37 and engages with the limit groove 37, thereby connecting the base 29 and the lower gasket 31.

[0023] Furthermore, the auxiliary fire extinguishing assembly includes a movable plate 49, which is slidably connected to the inside of the movable cavity 50, and the movable cavity 50 is opened on the upper card plate 30. A rack 51 is fixedly connected to the movable plate 49, and the rack 51 is meshed with a transmission gear 52. The transmission gear 52 is rotatably connected to the inner wall of the movable cavity 50, and the transmission gear 52 is also meshed with a baffle 53, and the baffle 53 is slidably connected to the inside of the movable cavity 50. A storage tank 54 is opened on one side of the movable cavity 50, and the inside of the storage tank 54 is filled with a dry powder fire extinguishing agent 55. A separation film is glued to the side of the dry powder fire extinguishing agent 55 away from the inner wall of the storage tank 54, and the separation film is connected to the storage tank 5 4, a sliding groove 56 is provided on one side of the movable plate 49, a sliding rod 57 is fixedly connected inside the sliding groove 56, a sliding block 58 is slidably connected to the outer side of the sliding rod 57, the sliding block 58 is fixedly connected to the inner wall of the movable cavity 50, a third spring 59 is wound around the outer side of the sliding rod 57, one end of the third spring 59 is fixedly connected to the top of the inner wall of the sliding groove 56, and the other end of the third spring 59 is fixedly connected to the sliding block 58; when the upper clamping plate 30 is connected to the base 29, as the inner wall of the upper clamping plate 30 gradually approaches the main outer bushing 27 and the auxiliary outer bushing 28, one end of the movable plate 49 gradually aligns with the main outer bushing 27 and the auxiliary outer bushing 28. The auxiliary outer bushing 28 contacts and is squeezed by the main outer bushing 27 and the auxiliary outer bushing 28, and moves in the direction away from the main outer bushing 27 and the auxiliary outer bushing 28 under the action of the squeezing force. When the movable plate 49 moves, the gear rack 51 fixedly connected to the inner wall drives the meshing transmission gear 52 to rotate synchronously, so that the baffle 53 meshing with the transmission gear 52 moves to release the shielding of the storage tank 54 and open the storage tank 54. When the dry powder fire extinguishing agent 55 in the storage tank 54 encounters high temperature, the isolation membrane at the bottom thereof will be melted by the high temperature to release the obstruction to the dry powder fire extinguishing agent 55. At this time, the dry powder fire extinguishing agent 55 will be automatically dispersed under the action of gravity. It falls on the outside of the control cable as a whole, extinguishes and blocks the flame, and protects the control cable; when the movable plate 49 moves, the sliding block 58 fixedly connected to the inner wall of the movable cavity 50 slides synchronously in the sliding groove 56, and squeezes the third spring 59 to cause the third spring 59 to produce elastic deformation. When the movable plate 49 is no longer squeezed, the movable plate 49 automatically returns to its original position under the action of the restoring force of the third spring 59, and drives the transmission gear 52 to rotate so that the baffle 53 also moves to its original position to cover the storage tank 54, thereby preventing the isolation membrane on the dry powder fire extinguishing agent 55 from being damaged and causing the dry powder fire extinguishing agent 55 to accidentally spill.

[0024] Furthermore, a slider 39 is fixedly connected to the top of the limit block 36, and the slider 39 is slidably connected to the inside of the slide groove 40, and the slide groove 40 is opened at the top of the storage cavity 35; when the limit block 36 is moving, the slider 39 fixedly connected to the limit block 36 slides synchronously inside the slide groove 40, and the movement distance of the limit block 36 is limited by the combination of the slider 39 and the slide groove 40, so as to prevent the limit block 36 from moving excessively and escaping from the inside of the storage cavity 35 under the action of the restoring force of the first spring 38.

[0025] Furthermore, the release assembly includes a push block 41, which is slidably connected to the inside of the limiting groove 37, a sliding rod 42 is fixedly connected to the inner wall of the push block 41, a sliding block 43 is slidably connected to the outer side of the sliding rod 42, the sliding block 43 is fixedly connected to the inner wall of the limiting groove 37, and a second spring 44 is also wound around the outer side of the sliding rod 42, the top end of the second spring 44 is fixedly connected to the sliding block 43, and the bottom end of the second spring 44 is fixedly connected to the inner wall of the push block 41; when the control cable is to be released, the push block 41 is first pushed upward, and the anti-slip grooves provided on the push block 41 can effectively increase the friction force, making it convenient to push the push block 41, and in the process of the push block 41 moving upward, The sliding block 43 slides on the outside of the sliding rod 42 and squeezes the second spring 44, causing the second spring 44 to produce elastic deformation under the action of the squeezing force. In the process of the push block 41 moving upward, the top of the push block 41 squeezes the inclined surface opened at the bottom end of the limit block 36, causing the limit block 36 to move toward the inside of the storage chamber 35 to release the engagement with the limit groove 37. At this time, the upper clamping plate 30 is pulled upward to drive the plug block 33 to disengage from the inside of the slot 34 to release the fixation of the control cable as a whole. After the push of the push block 41 stops, the push block 41 returns to its original position under the action of the restoring force of the second spring 44, avoiding obstruction to the reconnection between the upper clamping plate 30 and the base 29.

[0026] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A fire-resistant control cable, comprising a cable core (1); characterized in that: The cable core (1) is provided in seven groups, and the outer sides of the seven groups of the cable cores (1) are all fixedly connected with an inner insulating layer (21), the outer side of the inner insulating layer (21) is wound with an inner shielding layer (22), the cable core (1), the inner insulating layer (21) and the inner shielding layer (22) are evenly distributed in a circular array inside a filler (23), the outer side of the filler (23) is fixedly connected with an outer shielding layer (24), the outer side of the outer shielding layer (24) is fixedly connected with an outer insulating layer (25), the outer side of the outer insulating layer (25) is fixedly connected with an isolation layer (26), the outer side of the isolation layer (26) is fixedly connected with a main outer bushing (27), the main outer bushing (27) is provided in eight groups, and a secondary outer bushing (28) is provided between every two groups of the main outer bushings (27), and the secondary outer bushing (28) is also fixedly connected to the outer side of the isolation layer (26); A fixing mechanism is provided on the outside of the main outer bushing (27) and the auxiliary outer bushing (28), and the fixing mechanism is used to fix the entire cable at a specified position in a preset manner.

2. A fire-resistant control cable according to claim 1, characterized in that: The inner shielding layer (22) is made of copper foil, the filler (23) is made of magnesium hydroxide, the outer shielding layer (24) is made of aluminum foil, the outer insulating layer (25) is made of flame-retardant polyvinyl chloride, the isolation layer (26) is made of aromatic sulfone, the main outer bushing (27) is made of cross-linked polyethylene, and the auxiliary outer bushing (28) is made of ceramic fiber.

3. A fire-resistant control cable according to claim 2, characterized in that: The fixing mechanism comprises a base (29), an upper clamping plate (30) is arranged at the top of the base (29), a lower gasket (31) is glued to the inner wall of the base (29), a lateral fitting fixing component is arranged between the top of the base (29) and the bottom of the upper clamping plate (30), the lower gasket (31) is made of halogen-free flame-retardant silicone rubber, and an auxiliary fire extinguishing component is arranged on the upper clamping plate (30).

4. A fire-resistant control cable according to claim 3, characterized in that: The auxiliary fire extinguishing assembly comprises a movable plate (49), wherein the movable plate (49) is slidably connected to the interior of an active cavity (50), wherein the active cavity (50) is provided on an upper clamping plate (30), wherein a rack (51) is fixedly connected to the movable plate (49), wherein the rack (51) is meshed with a transmission gear (52), wherein the transmission gear (52) is rotatably connected to the inner wall of the active cavity (50), and wherein the transmission gear (52) is also meshed with a baffle (53), wherein the baffle (53) is slidably connected to the interior of the active cavity (50), and wherein a storage groove (54) is provided on one side of the active cavity (50), wherein the interior of the storage groove (54) is filled with dry powder. A fire extinguishing agent (55), wherein an isolation film is glued to a side of the dry powder fire extinguishing agent (55) away from the inner wall of the storage tank (54), a sliding groove (56) is opened on one side of the movable plate (49), a sliding rod (57) is fixedly connected to the inside of the sliding groove (56), a sliding block (58) is slidably connected to the outside of the sliding rod (57), and the sliding block (58) is fixedly connected to the inner wall of the movable cavity (50), and a third spring (59) is wound around the outside of the sliding rod (57), one end of the third spring (59) is fixedly connected to the top of the inner wall of the sliding groove (56), and the other end of the third spring (59) is fixedly connected to the sliding block (58).

5. A fire-resistant control cable according to claim 4, characterized in that: The lateral fitting fixing assembly comprises an insert block (33), the insert block (33) being fixedly connected to both sides of the bottom end of the upper card plate (30), and the insert block (33) being inserted into a slot (34), the slot (34) being provided at the top end of the base (29), a receiving cavity (35) being provided at one side of the insert block (33), the interior of the receiving cavity (35) being slidably connected to a limit block (36), the limit block (36) being engaged with a limit groove (37), the limit groove (37) being provided at both sides of the base (29), the receiving cavity (35) being provided with a plurality of spacers, and the plurality of spacers (36) being provided with a plurality of spacers. ) is also provided with a first spring (38) inside, a release assembly is provided at the bottom end of the limit groove (37), a side of the plug block (33) away from the release assembly is in contact with the rotating plate (45), front and rear ends of the rotating plate (45) are rotatably connected to the inner wall of the movable groove (47), and a torsion spring (48) is also provided between the front and rear ends of the rotating plate (45) and the inner wall of the movable groove (47), and a side gasket (46) is fixedly connected to the side of the rotating plate (45) away from the plug block (33), and the side gasket (46) is made of halogen-free flame-retardant silicone rubber.

6. A fire-resistant control cable according to claim 5, characterized in that: The side of the first spring (38) close to the limit block (36) is fixedly connected to the limit block (36), and the side of the first spring (38) away from the limit block (36) is fixedly connected to the inner wall of the storage cavity (35).

7. A fire-resistant control cable according to claim 6, characterized in that: A sliding block (39) is fixedly connected to the top of the limiting block (36), and the sliding block (39) is slidably connected to the inside of a sliding groove (40), and the sliding groove (40) is opened at the top of the storage cavity (35).

8. A fire-resistant control cable according to claim 7, characterized in that: One end of the torsion spring (48) close to the rotating plate (45) is fixedly connected to the rotating plate (45), and one end of the torsion spring (48) away from the rotating plate (45) is fixedly connected to the inner wall of the movable groove (47).

9. A fire-resistant control cable according to claim 8, characterized in that: The release assembly comprises a push block (41), the push block (41) is slidably connected to the inside of the limiting groove (37), a sliding rod (42) is fixedly connected to the inner wall of the push block (41), a sliding block (43) is slidably connected to the outer side of the sliding rod (42), the sliding block (43) is fixedly connected to the inner wall of the limiting groove (37), and a second spring (44) is also wound around the outer side of the sliding rod (42).

10. A fire-resistant control cable according to claim 9, characterized in that: The top end of the second spring (44) is fixedly connected to the sliding block (43), and the bottom end of the second spring (44) is fixedly connected to the inner wall of the pushing block (41).

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