Explosion-proof high and low temperature resistant flexible cable

Abstract

The utility model discloses an explosion-proof high and low temperature resistant flexible cable, which relates to the technical field of combustion ignition systems and comprises a conductive metal wire, a first insulating sleeve and a second insulating sleeve which are arranged from inside to outside, and a ceramic cylinder assembly is arranged between the first insulating sleeve and the second insulating sleeve. The periphery of the second insulating sleeve is sleeved with a stainless steel protection layer. The first anti-explosion connector assembly is arranged at one end of the conductive metal wire and comprises a first stainless steel connecting piece and a second ceramic connecting piece, the periphery of the first stainless steel connecting piece is connected with one end of the stainless steel protective layer, and the inner periphery of the second ceramic connecting piece is connected with one end of the conductive metal wire in a clamped mode; a spring is arranged between the two connecting pieces; the second explosion-proof joint assembly is arranged at the other end of the conductive metal wire, and the second explosion-proof joint assembly is matched with the stainless steel protective layer and the second insulating sleeve; the flexible cable can meet the use environment of high energy and high voltage, and achieves the effects of high temperature resistance and low temperature resistance.

Description

Technical Field

[0001] The utility model belongs to the technical field of combustion ignition systems, and more specifically relates to an explosion-proof and high and low temperature resistant flexible cable. Background Art

[0002] Chemical plants such as petrochemicals and coal chemical plants need to be heated during the production process, and flammable and harmful gases and liquids need to be discharged after combustion. The wires of the ignition system will be affected by environmental factors. When the temperature is too high or too low, ordinary wires will be damaged. High-voltage power cannot be transmitted safely and effectively, and it cannot be used normally in an emergency. This poses a safety hazard to the device and cannot ensure the reliable operation of the system. Utility Model Content

[0003] The purpose of the utility model is to provide an explosion-proof and high and low temperature resistant flexible cable to address the deficiencies in the prior art. The flexible cable can meet the use environment of high energy and high pressure and achieve the effect of high and low temperature resistance.

[0004] In order to achieve the above object, the utility model provides an explosion-proof and high and low temperature resistant flexible cable, comprising:

[0005] A conductive metal wire, a first insulating sleeve, and a second insulating sleeve are arranged from the inside out, a ceramic cylindrical component is arranged between the first insulating sleeve and the second insulating sleeve, the outer surface of the conductive metal wire is coated with high-temperature insulating paint, and the outer periphery of the second insulating sleeve is covered with a stainless steel protective layer;

[0006] a first explosion-proof joint assembly, provided with one end of the conductive metal wire, the first explosion-proof joint assembly comprising a first stainless steel connector and a second ceramic connector, the outer periphery of the first stainless steel connector being connected to one end of the stainless steel protective layer, the inner periphery of the second ceramic connector being clamped to one end of the conductive metal wire, and a spring being provided between the first stainless steel connector and the second ceramic connector;

[0007] A second explosion-proof joint assembly is provided at the other end of the conductive metal wire, and the second explosion-proof joint assembly cooperates with the stainless steel protective layer and the second insulating sleeve.

[0008] Optionally, the ceramic cylindrical assembly includes a plurality of spherical beads arranged along the length direction of the conductive metal wire, a cylindrical connecting piece is provided between adjacent spherical beads, and the spherical beads and the cylindrical connecting piece are respectively provided with through holes for passing the conductive metal wire, and the spherical beads located at the end portions are respectively abutted against the second ceramic connecting piece and the second explosion-proof joint assembly.

[0009] Optionally, first concave surfaces are provided at both ends of the cylindrical connecting piece, and the first concave surfaces of the two cylindrical connecting pieces close to each other cooperate with the spherical balls.

[0010] Optionally, the ceramic cylindrical assembly includes a plurality of columnar beads arranged along the length direction of the conductive metal wire, one end and the other end of the columnar bead are respectively provided with a second concave surface and a convex surface, one end of the columnar bead cooperates with the other end of the adjacent columnar bead, and the columnar beads located at the end portions are respectively abutted against the second ceramic connector and the second explosion-proof joint assembly.

[0011] Optionally, the stainless steel protective layer includes a stainless steel wire mesh and a stainless steel bellows, the inner side of the stainless steel bellows is in contact with the second insulating sleeve, one end of the stainless steel bellows is against the first stainless steel connector, and the end of the first stainless steel connector is embedded in the stainless steel wire mesh.

[0012] Optionally, one end of the first stainless steel connector abuts against the end of the second insulating sleeve, a first clamping portion is provided on the inner periphery of the first stainless steel connector, a second clamping portion is provided on the outer periphery of the second ceramic connector, and both ends of the spring abut against the first clamping portion and the second clamping portion respectively.

[0013] Optionally, the first explosion-proof joint assembly further includes a locking nut and a first conductive column, the locking nut is threaded onto the outer periphery of the first stainless steel connector, the first conductive column is connected to one end of the conductive metal wire, and the first conductive column is clamped to the inner wall of the second ceramic connector.

[0014] Optionally, the second explosion-proof joint assembly includes a stainless steel connecting stud and a convex ceramic part, the stainless steel connecting stud is sleeved on the outer periphery of the convex ceramic part and connected to the stainless steel protective layer, the inner periphery of the stainless steel connecting stud is provided with a boss, and the outer periphery of one end of the convex ceramic part is provided with a recessed platform, the other end of the convex ceramic part is abutted against the ceramic cylindrical assembly, the boss and the recessed platform are snap-fitted, and the other end of the conductive metal wire is provided with a second conductive column, and the second conductive column is connected to the convex ceramic part.

[0015] Optionally, the first insulating sleeve is a glass fiber sleeve, and the second insulating sleeve is a ceramic fiber sleeve.

[0016] The utility model provides an explosion-proof and high and low temperature resistant flexible cable, which has the beneficial effects that: the flexible cable is sequentially wrapped with a first insulating sleeve, a ceramic cylindrical component, a second insulating sleeve and a stainless steel protective layer on the outside of the conductive metal wire, which can improve the cable's ability to withstand high and low temperatures and high pressure. In addition, a spring is provided between the first stainless steel connector and the second ceramic connector, and the spring always squeezes the first stainless steel connector, thereby keeping the stainless steel bellows in a compressed state, which can achieve the effect of sealing, moisture-proof and rain-proof.

[0017] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0019] Figure 1 A schematic structural diagram of an explosion-proof and high and low temperature resistant flexible cable according to an embodiment of the present utility model is shown.

[0020] Figure 2 A structural schematic diagram of a ceramic cylindrical component according to an embodiment of the present utility model is shown.

[0021] Figure 3 A schematic structural diagram of another ceramic cylindrical component according to an embodiment of the present utility model is shown.

[0022] Description of reference numerals:

[0023] 1. Conductive wire; 2. First insulating sleeve; 3. Second insulating sleeve; 4. Ceramic cylindrical assembly; 5. First stainless steel connector; 6. Second ceramic connector; 7. Spring; 8. Spherical ball; 9. Cylindrical connector; 10. Columnar bead; 11. Stainless steel wire mesh; 12. Stainless steel bellows; 13. Locking nut; 14. First conductive column; 15. Stainless steel connecting stud; 16. Convex ceramic component; 17. Second conductive column. DETAILED DESCRIPTION

[0024] The following describes preferred embodiments of the present invention in greater detail. Although preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0025] The utility model provides an explosion-proof and high and low temperature resistant flexible cable, comprising:

[0026] A conductive metal wire, a first insulating sleeve, and a second insulating sleeve are arranged from the inside out, a ceramic cylindrical component is arranged between the first insulating sleeve and the second insulating sleeve, the outer surface of the conductive metal wire is coated with high-temperature insulating paint, and the outer periphery of the second insulating sleeve is covered with a stainless steel protective layer;

[0027] A first explosion-proof joint assembly is provided, wherein one end of the conductive metal wire is provided. The first explosion-proof joint assembly includes a first stainless steel connector and a second ceramic connector. The outer periphery of the first stainless steel connector is connected to one end of the stainless steel protective layer, and the inner periphery of the second ceramic connector is clamped to the one end of the conductive metal wire. A spring is provided between the first stainless steel connector and the second ceramic connector.

[0028] The second explosion-proof joint assembly is arranged at the other end of the conductive metal wire, and the second explosion-proof joint assembly cooperates with the stainless steel protective layer and the second insulating sleeve.

[0029] Specifically, a conductive metal wire is arranged in the center of the flexible cable, and a first insulating sleeve, a ceramic cylindrical assembly, a second insulating sleeve and a stainless steel protective layer are included on the outer periphery of the conductive metal wire. In this way, the multi-layer protective structure can improve the conductive metal wire's ability to withstand high pressure and high and low temperatures. In addition, a first explosion-proof joint assembly and a second explosion-proof joint assembly are arranged at the end of the conductive metal wire. The two explosion-proof joint assemblies can fix the layers of protective sleeves on the outer periphery of the conductive metal wire, so that the ceramic cylindrical assembly can completely cover the conductive metal wire. In addition, a spring is arranged in the first explosion-proof joint assembly. When the stainless steel corrugation becomes longer due to heat, the end of the stainless steel bellows will push the first stainless steel connector toward the second ceramic connector. The spring can relieve the extrusion force of the first stainless steel connector on the second ceramic connector to prevent damage caused by extrusion deformation of both.

[0030] Optionally, the ceramic cylindrical assembly includes a plurality of spherical beads arranged along the length direction of the conductive metal wire, a cylindrical connector is provided between adjacent spherical beads, and the spherical beads and the cylindrical connector are respectively provided with through holes for passing the conductive metal wire, and the spherical beads located at the ends are respectively abutted against the second ceramic connector and the second explosion-proof joint assembly.

[0031] Optionally, first concave surfaces are provided at both ends of the cylindrical connecting piece, and the first concave surfaces of the two cylindrical connecting pieces close to each other cooperate with the spherical balls.

[0032] Specifically, the ceramic cylindrical assembly can be composed of multiple spherical beads and cylindrical connectors. A spherical bead is placed between two adjacent cylindrical connectors. The spherical bead is clamped and limited by the first concave surface on the cylindrical connector, and the conductive metal wire is passed through the through holes on the spherical bead and the cylindrical connector. In this way, the spherical bead and the cylindrical connector are squeezed and fitted together, so that the ceramic cylindrical assembly can fill the space between the first insulating sleeve and the second insulating sleeve, thereby improving the insulation and high-temperature resistance of the metal conductive wire.

[0033] Optionally, the ceramic cylindrical assembly includes a plurality of columnar beads arranged along the length direction of the conductive metal wire, one end and the other end of the columnar beads are respectively provided with a second concave surface and a convex surface, one end of the columnar bead cooperates with the other end of the adjacent columnar bead, and the columnar beads located at the end portions are respectively abutted against the second ceramic connector and the second explosion-proof joint assembly.

[0034] Specifically, the ceramic cylindrical assembly can also be composed of multiple columnar beads. The two ends of the columnar beads are completely different, but the ends of the columnar beads with different shapes are docked together to achieve the snap-fitting of the two columnar beads; the conductive metal wire also runs through all the columnar beads, and is then clamped and fixed by two explosion-proof joint assemblies, so that the columnar beads can fill the space between the first insulating sleeve and the second insulating sleeve, thereby improving the insulation and high-temperature resistance of the metal conductive wire.

[0035] Optionally, the stainless steel protective layer includes a stainless steel wire mesh and a stainless steel bellows, the inner side of the stainless steel bellows is in contact with the second insulating sleeve, one end of the stainless steel bellows is against the first stainless steel connector, and the end of the first stainless steel connector is embedded in the stainless steel wire mesh.

[0036] Specifically, the stainless steel wire mesh can be a woven mesh sleeve to prevent the stainless steel bellows from being mechanically damaged. The bellows of the stainless steel bellows is a flexible hose, which is used to seal against moisture, rain and combustible gas, and can effectively prevent sparks from causing explosions; the end of the stainless steel bellows fits with the end face of the first stainless steel connector, so that under the action of the spring, when the length of the first stainless steel connector changes after being heated, it will not cause squeezing of the second ceramic connector. In addition, the end of the first stainless steel connector also extends into the interior of the stainless steel wire mesh, so that the first stainless steel connector and the stainless steel protective layer can achieve a sealed connection effect.

[0037] Optionally, one end of the first stainless steel connector abuts against the end of the second insulating sleeve, a first clamping portion is provided on the inner periphery of the first stainless steel connector, a second clamping portion is provided on the outer periphery of the second ceramic connector, and both ends of the spring abut against the first clamping portion and the second clamping portion respectively.

[0038] Specifically, the spring is arranged between the first stainless steel connector and the second ceramic connector, the outer side of the first stainless steel connector is in contact with the stainless steel protective layer, and the inner side of the second ceramic connector is connected to the conductive metal wire. As the second ceramic connector moves toward the middle of the conductive metal wire, the spring exerts greater pressure on the stainless steel protective layer, thereby making the wall size of the stainless steel bellows thicker and making the second insulating sleeve fit more closely with the ceramic cylindrical assembly.

[0039] Optionally, the first explosion-proof joint assembly also includes a locking nut and a first conductive column, the locking nut is threaded onto the outer periphery of the first stainless steel connector, the first conductive column is connected to one end of the conductive metal wire, and the first conductive column is clamped to the inner wall of the second ceramic connector.

[0040] Specifically, a first conductive post is welded to one end of the conductive metal wire, which can ensure the normal conductive function of the flexible cable. In addition, a second ceramic connector is also sleeved on the outer periphery of one end of the conductive metal wire. Since the outer diameter of the first conductive post is larger than the inner diameter of the second ceramic connector, the first conductive post can fix the second ceramic connector to the outer periphery of the conductive metal wire. A first stainless steel connector is also provided on the periphery of the second ceramic connector. Since the first stainless steel connector is connected to the stainless steel bellows, when the spring is subjected to force between the first stainless steel connector and the second ceramic connector, the displacement change between the two parts is reduced to prevent mutual extrusion damage. When the first explosion-proof connector assembly is connected to other equipment, the spring's own elastic force can prevent loosening during the connection process, ensuring the normal conductivity of the flexible cable.

[0041] Optionally, the second explosion-proof joint assembly includes a stainless steel connecting stud and a convex ceramic part. The stainless steel connecting stud is sleeved on the outer periphery of the convex ceramic part and connected to the stainless steel protective layer. A boss is provided on the inner periphery of the stainless steel connecting stud, and a recess is provided on the outer periphery of one end of the convex ceramic part. The other end of the convex ceramic part is abutted against the ceramic cylindrical assembly, and the boss and the recess are snap-fitted together. A second conductive column is provided on the other end of the conductive metal wire, and the second conductive column is connected to the convex ceramic part.

[0042] Specifically, the stainless steel connecting stud is connected to the stainless steel protective cover, so that the stainless steel connecting stud can limit the movement of the concave platform on the convex ceramic part through the boss. Since the connecting bolt and the convex part are made of high and low temperature resistant insulating materials, no conductivity occurs although the two are in contact, so that the convex ceramic part cannot be separated from the conductive metal wire. In addition, the inner side of the convex ceramic part can always fit with the ceramic cylindrical assembly. A second conductive column is also provided on the convex ceramic part, and the second conductive column is connected to the other end of the conductive metal wire, which can ensure the normal conductive function of the flexible cable.

[0043] Optionally, the first insulating sleeve is a glass fiber sleeve, and the second insulating sleeve is a ceramic fiber sleeve.

[0044] Specifically, the glass fiber sheath can withstand temperatures up to 800°C, while the ceramic fiber sheath can withstand temperatures up to 1000°C. Furthermore, coating the outer surface of the conductive metal wire with a high-temperature insulating paint can further increase the wire's heat resistance to 800°C. Ceramic stoppers are placed around the outer periphery of the ceramic cylindrical assembly to provide enhanced thermal insulation.

[0045] Example

[0046] like Figures 1 to 3 As shown, the utility model provides an explosion-proof and high and low temperature resistant flexible cable, comprising:

[0047] A conductive metal wire 1, a first insulating sleeve 2, and a second insulating sleeve 3 are arranged from the inside out, with a ceramic cylindrical component arranged between the first insulating sleeve 2 and the second insulating sleeve 3. The outer surface of the conductive metal wire 1 is coated with high-temperature insulating paint, and the outer periphery of the second insulating sleeve 3 is covered with a stainless steel protective layer;

[0048] A first explosion-proof joint assembly is provided, wherein one end of the conductive metal wire 1 is provided. The first explosion-proof joint assembly includes a first stainless steel connector 5 and a second ceramic connector 6. The outer periphery of the first stainless steel connector 5 is connected to one end of the stainless steel protective layer, and the inner periphery of the second ceramic connector 6 is clamped to one end of the conductive metal wire 1. A spring 7 is provided between the first stainless steel connector 5 and the second ceramic connector 6;

[0049] The second explosion-proof joint assembly is arranged at the other end of the conductive metal wire 1 , and the second explosion-proof joint assembly cooperates with the stainless steel protective layer and the second insulating sleeve 3 .

[0050] In this embodiment, the ceramic cylindrical assembly includes a plurality of spherical beads 8 arranged along the length direction of the conductive metal wire 1, and a cylindrical connector 9 is arranged between adjacent spherical beads 8. The spherical beads 8 and the cylindrical connector 9 are respectively provided with through holes for passing the conductive metal wire. The spherical beads 8 at the ends are respectively abutted against the second ceramic connector 6 and the second explosion-proof joint assembly.

[0051] In this embodiment, first concave surfaces are provided at both ends of the cylindrical connecting member 9 , and the first concave surfaces of the two cylindrical connecting members 9 , which are close to each other, cooperate with the spherical balls 8 .

[0052] In this embodiment, the ceramic cylindrical assembly includes a plurality of columnar beads 10 arranged along the length direction of the conductive metal wire 1, and a second concave surface and a convex surface are respectively provided at one end and the other end of the columnar bead 10. One end of the columnar bead 10 cooperates with the other end of the adjacent columnar bead 10, and the columnar beads 10 located at the end portions are respectively abutted against the second ceramic connector 6 and the second explosion-proof joint assembly.

[0053] In this embodiment, the stainless steel protective layer includes a stainless steel wire mesh 11 and a stainless steel bellows 12. The inner side of the stainless steel bellows 12 is in contact with the second insulating sleeve 3. One end of the stainless steel bellows 12 is in contact with the first stainless steel connector 5. The end of the first stainless steel connector 5 is embedded in the stainless steel wire mesh 11.

[0054] In this embodiment, one end of the first stainless steel connector 5 abuts against the end of the second insulating sleeve 3, a first clamping portion is provided on the inner periphery of the first stainless steel connector 5, a second clamping portion is provided on the outer periphery of the second ceramic connector 6, and both ends of the spring 7 abut against the first clamping portion and the second clamping portion respectively.

[0055] In this embodiment, the first explosion-proof joint assembly also includes a locking nut 13 and a first conductive column 14. The locking nut 13 is screwed onto the outer periphery of the first stainless steel connector 5. The first conductive column 14 is connected to one end of the conductive metal wire 1. The first conductive column 14 is clamped to the inner wall of the second ceramic connector 6.

[0056] In this embodiment, the second explosion-proof joint assembly includes a stainless steel connecting stud 15 and a convex ceramic part 16. The stainless steel connecting stud 15 is sleeved on the outer periphery of the convex ceramic part 16 and connected to the stainless steel protective layer. The inner periphery of the stainless steel connecting stud 15 is provided with a boss, and the outer periphery of one end of the convex ceramic part 16 is provided with a recessed platform. The other end of the convex ceramic part 16 is abutted against the ceramic cylindrical assembly, and the boss and the recessed platform are snap-fitted. The other end of the conductive metal wire 1 is provided with a second conductive column 17, and the second conductive column 17 is connected to the convex ceramic part 16.

[0057] In this embodiment, the first insulating sleeve 2 is a glass fiber sleeve, and the second insulating sleeve 3 is a ceramic fiber sleeve.

[0058] In summary, the explosion-proof and high and low temperature resistant flexible cable is composed of a conductive metal wire 1 from the inside to the outside, high-temperature insulating paint is applied on the surface of the conductive metal wire 1, the wire wire sprayed with high-temperature insulating paint is passed through a glass fiber sleeve, a plurality of spherical ceramic beads are passed through the wire wire and the glass fiber sleeve, a ceramic fiber sleeve is continued to be sleeved on the cable with a plurality of spherical ceramic beads, and then passed through an explosion-proof metal bellows, a metal braided mesh is passed through the outer layer of the bellows, two explosion-proof joint assemblies are installed at both ends of the flexible cable, and a spring 7 is installed between the first stainless steel connector 5 and the second ceramic connector 6. In this way, an extrusion force can be applied to the explosion-proof metal bellows, so that the bellows and the ceramic fiber sleeve fit tightly, the combustible gas is isolated from the outside, and sparks are prevented from causing explosions.

[0059] While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An explosion-proof and high and low temperature resistant flexible cable, characterized in that: include: A conductive metal wire (1), a first insulating sleeve (2), and a second insulating sleeve (3) are arranged from the inside out, a ceramic cylindrical component is arranged between the first insulating sleeve (2) and the second insulating sleeve (3), the outer surface of the conductive metal wire (1) is coated with high-temperature insulating paint, and the outer periphery of the second insulating sleeve (3) is sheathed with a stainless steel protective layer; A first explosion-proof joint assembly is provided on one end of the conductive metal wire (1), the first explosion-proof joint assembly comprising a first stainless steel connector (5) and a second ceramic connector (6), the outer periphery of the first stainless steel connector (5) being connected to one end of the stainless steel protective layer, the inner periphery of the second ceramic connector (6) being clamped to one end of the conductive metal wire (1), and a spring (7) being provided between the first stainless steel connector (5) and the second ceramic connector (6); A second explosion-proof joint assembly is provided at the other end of the conductive metal wire (1), and the second explosion-proof joint assembly cooperates with the stainless steel protective layer and the second insulating sleeve (3).

2. The explosion-proof and high and low temperature resistant flexible cable according to claim 1, characterized in that: The ceramic cylindrical assembly comprises a plurality of spherical beads (8) arranged along the length direction of the conductive metal wire (1), a cylindrical connector (9) is arranged between adjacent spherical beads (8), and the spherical beads (8) and the cylindrical connector (9) are respectively provided with through holes for passing the conductive metal wire (1), and the spherical beads (8) located at the end portions are respectively in contact with the second ceramic connector (6) and the second explosion-proof joint assembly.

3. The explosion-proof and high and low temperature resistant flexible cable according to claim 2, characterized in that: Both ends of the cylindrical connecting member (9) are provided with first concave surfaces, and the first concave surfaces of the two cylindrical connecting members (9) close to each other are matched with the spherical ball (8).

4. The explosion-proof and high and low temperature resistant flexible cable according to claim 1, characterized in that: The ceramic cylindrical assembly comprises a plurality of columnar beads (10) arranged along the length direction of the conductive metal wire (1), one end and the other end of the columnar bead (10) are respectively provided with a second concave surface and a convex surface, one end of the columnar bead (10) is matched with the other end of the adjacent columnar bead (10), and the columnar beads (10) located at the end portions are respectively abutted against the second ceramic connector (6) and the second explosion-proof joint assembly.

5. The explosion-proof and high and low temperature resistant flexible cable according to claim 1, characterized in that: The stainless steel protective layer comprises a stainless steel wire mesh (11) and a stainless steel bellows (12); the inner side of the stainless steel bellows (12) is in contact with the second insulating sleeve (3); one end of the stainless steel bellows (12) is in contact with the first stainless steel connector (5); and the end of the first stainless steel connector (5) is embedded in the interior of the stainless steel wire mesh (11).

6. The explosion-proof and high and low temperature resistant flexible cable according to claim 5, characterized in that: One end of the first stainless steel connector (5) abuts against the end of the second insulating sleeve (3); a first clamping portion is provided on the inner periphery of the first stainless steel connector (5); a second clamping portion is provided on the outer periphery of the second ceramic connector (6); and both ends of the spring (7) abut against the first clamping portion and the second clamping portion, respectively.

7. The explosion-proof and high and low temperature resistant flexible cable according to claim 6, characterized in that: The first explosion-proof joint assembly further comprises a locking nut (13) and a first conductive column (14), wherein the locking nut (13) is screwed onto the outer periphery of the first stainless steel connector (5), the first conductive column (14) is connected to one end of the conductive metal wire (1), and the first conductive column (14) is clamped to the inner wall of the second ceramic connector (6).

8. The explosion-proof and high and low temperature resistant flexible cable according to claim 7, characterized in that: The second explosion-proof joint assembly comprises a stainless steel connecting stud (15) and a convex ceramic part (16), wherein the stainless steel connecting stud (15) is sleeved on the outer periphery of the convex ceramic part (16) and connected to the stainless steel protective layer, a boss is provided on the inner periphery of the stainless steel connecting stud (15), a concave is provided on the outer periphery of one end of the convex ceramic part (16), the other end of the convex ceramic part (16) abuts against the ceramic cylindrical assembly, the boss and the concave are snap-fitted, and a second conductive column (17) is provided on the other end of the conductive wire (1), and the second conductive column (17) is connected to the convex ceramic part (16).

9. The explosion-proof and high and low temperature resistant flexible cable according to claim 1, characterized in that: The first insulating sleeve (2) is a glass fiber sleeve, and the second insulating sleeve (3) is a ceramic fiber sleeve.

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