Compression-resistant and anti-static cable for coal mine

Abstract

The invention provides a compression-resistant anti-static coal mine cable, which belongs to the technical field of cables and comprises a wire core, a first impact-resistant mechanism and an insulating layer. The first anti-impact mechanism coats the exterior of the wire core; the first anti-impact mechanism comprises a plurality of first energy-absorbing capsules and first pipelines for connecting the adjacent first energy-absorbing capsules; the first energy absorption capsule is filled with insulating liquid and has elasticity. The first energy-absorbing capsules can deform when being impacted, and insulating liquid in the first energy-absorbing capsules enters the adjacent first energy-absorbing capsules through the first pipelines. And the insulating layer is coated outside the first anti-impact mechanism. According to the compression-resistant anti-static cable for the coal mine, when the cable is impacted, the impacted first energy absorption capsule deforms, and the impact force is reduced. When the cable is impacted, impact energy is absorbed through deformation buffering of the first energy absorption capsule and flowing of the insulating liquid, impact on the inner wire core is reduced, and therefore the wire core can work normally.

Description

Technical Field

[0001] The invention belongs to the technical field of cables, and more specifically, relates to a pressure-resistant and anti-static cable for coal mines. Background Art

[0002] Cable is a wire product used to transmit electrical (magnetic) energy information and realize electromagnetic energy conversion. In coal mines, there is a possibility that coal and stones fall off the wall and fall on the cable, which will have a great impact on the cable. The current cable has the following defects: the outside of the cable is protected by an insulating skin, and the impact resistance is weak. The falling stones and coal will damage the wire part inside the cable, causing the cable to fail to work properly. Summary of the invention

[0003] The purpose of the present invention is to provide a compression-resistant and anti-static cable for coal mines, aiming to solve the problem of poor impact resistance of cables in the prior art.

[0004] To achieve the above object, the technical solution adopted by the present invention is: to provide a pressure-resistant and anti-static coal mine cable, comprising: Conductor core; a first anti-shock mechanism, which is coated on the outside of the conductor core; the first anti-shock mechanism comprises a plurality of first energy-absorbing capsules and a first pipe connecting adjacent first energy-absorbing capsules; the first energy-absorbing capsules are filled with insulating liquid; the first energy-absorbing capsules may be deformed when impacted, and the insulating liquid inside flows through the first pipe in adjacent first energy-absorbing capsules to absorb energy; and The insulating layer is coated on the outside of the first anti-shock mechanism.

[0005] In a possible implementation, the first energy absorbing capsule includes a strength plate and a deformation plate connected to the strength plate, wherein the deformation plate is arranged on a side of the strength plate away from the conductor core; the deformation plate can undergo elastic deformation, and a cavity is formed between the deformation plate and the strength plate, and the cavity is filled with the insulating liquid.

[0006] In a possible implementation, the first anti-impact mechanism also includes a first coating layer; a first energy absorption cavity and a first accommodating groove are provided on the inner wall of the first coating layer close to the conductor core; the first energy absorption capsule is arranged in the first energy absorption cavity, and a deformation gap is reserved between the deformation plate and the inner wall of the first energy absorption cavity; the first pipe is arranged in the first accommodating groove.

[0007] In a possible implementation, it further includes a plurality of shaping rings sleeved on the outer circumferential surface of the conductor core, wherein the shaping rings are arranged perpendicular to the axis of the conductor core, and the plurality of shaping rings are evenly distributed along the axial direction of the conductor core.

[0008] In a possible implementation, the conductor core includes: A wire fixing member is provided with at least one wire fixing hole; wherein the first energy absorbing capsule and the first pipe are wrapped around the outside of the wire fixing member; and At least one wire strand is passed through the wire fixing groove in a one-to-one correspondence.

[0009] In a possible implementation, it also includes a second anti-impact mechanism arranged between the insulating coating and the first anti-impact mechanism, the second anti-impact mechanism includes a plurality of second energy-absorbing capsules and a second pipe connecting adjacent second energy-absorbing capsules; the second energy-absorbing capsules are filled with insulating liquid; the second energy-absorbing capsules can be deformed when impacted, and the insulating liquid inside flows through the second pipe in the adjacent second energy-absorbing capsules to absorb energy; the second energy-absorbing capsules are staggered with the first energy-absorbing capsules.

[0010] In a possible implementation manner, the second energy absorbing capsule has the same structure as the first energy absorbing capsule.

[0011] In a possible implementation, the second anti-impact mechanism also includes a second coating layer; a second energy absorption cavity and a second accommodating groove are provided on the inner wall of the second coating layer close to the conductor core; the second energy absorption capsule is arranged in the second energy absorption cavity, and a deformation gap is reserved between the deformation plate and the inner wall of the second energy absorption cavity; the second pipe is arranged in the second accommodating groove.

[0012] In a possible implementation, it further includes an antistatic layer covering the outside of the insulating layer, the antistatic layer includes a wire mesh and a grounding wire connected to the wire mesh; the wire mesh covers the outside of the insulating layer, and the grounding wire is grounded.

[0013] In a possible implementation, the antistatic layer further includes a base layer, the base layer is provided with a mounting groove, and the wire mesh is fixed in the mounting groove.

[0014] The beneficial effect of the pressure-resistant and anti-static coal mine cable provided by the present invention is that: compared with the prior art, the pressure-resistant and anti-static coal mine cable of the present invention is provided with a first anti-impact mechanism on the outside of the conductor core. When the cable is impacted, the pressure inside the impacted first energy-absorbing capsule increases, and the first energy-absorbing capsule is deformed to reduce the impact force. At the same time, the insulating liquid inside the impacted first energy-absorbing capsule enters the adjacent first energy-absorbing capsule through the first pipe, converting the impact energy into the kinetic energy of the flow of the insulating liquid, further reducing the damage caused by the impact. When the cable is impacted, the deformation buffer of the first energy-absorbing capsule and the flow of the insulating liquid absorb the impact energy, reducing the impact on the internal conductor core, so that the conductor core can work normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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.

[0016] Figure 1 A schematic diagram of the structure of a compression-resistant and anti-static cable for coal mines provided by an embodiment of the present invention; Figure 2 A schematic diagram of the structure of a first anti-shock mechanism and a second anti-shock mechanism provided in an embodiment of the present invention; Figure 3 A schematic structural diagram of a conductor core and a shaping ring provided in an embodiment of the present invention.

[0017] Description of reference numerals: 1. Wire core; 11. Wire fixing piece; 111. Wire fixing groove; 12. Wire strand; 2. First anti-impact mechanism; 21. First energy absorbing capsule; 211. Strength plate; 212. Deformation plate; 22. First pipeline; 23. First coating layer; 231. First energy absorbing cavity; 232. First containing groove; 3. Insulating layer; 4. Shaping ring; 5. Second anti-impact mechanism; 51. Second energy absorbing capsule; 52. Second pipeline; 53. Second coating layer; 531. Second energy absorbing cavity; 532. Second containing groove; 6. Antistatic layer; 61. Wire mesh; 62. Grounding wire; 63. Base layer. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] Reference Figure 1 and Figure 3 The anti-pressure and anti-static coal mine cable provided by the present invention is now described. The anti-pressure and anti-static coal mine cable comprises a conductor core 1, a first anti-shock mechanism 2 and an insulating layer 3.

[0020] The first anti-shock mechanism 2 is coated on the outside of the conductor core 1; the first anti-shock mechanism 2 includes a plurality of first energy-absorbing capsules 21 and a first pipe 22 connecting adjacent first energy-absorbing capsules 21; the first energy-absorbing capsules 21 are filled with insulating liquid, and the first energy-absorbing capsules 21 are elastic; the first energy-absorbing capsules 21 may be deformed when impacted, and the insulating liquid inside enters the adjacent first energy-absorbing capsules 21 through the first pipe 22; the insulating layer 3 is coated on the outside of the first anti-shock mechanism 2.

[0021] The insulating liquid is an insulating flame retardant oil, specifically transformer oil. Transformer oil is a fractionation product of petroleum, and its main components are compounds such as alkanes, cycloalkane saturated hydrocarbons, and aromatic unsaturated hydrocarbons. It is commonly known as square shed oil, a light yellow transparent liquid, with a relative density of 0.895 and a freezing point of less than -45°C. Transformer oil is a mineral oil obtained by distillation and refining of natural petroleum. It is a mixture of pure, stable, low-viscosity, good insulation, and good cooling liquid natural hydrocarbons obtained by acid-base refining of the lubricating oil fraction in petroleum. It is commonly known as square shed oil, a light yellow transparent liquid. The insulating oil is an insulating flame retardant oil, specifically linoleic acid ester insulating oil. The insulating liquid can be insulating oil, specifically fluoride insulating oil.

[0022] Compared with the prior art, the compression-resistant and anti-static coal mine cable provided by the present invention is that when coal blocks and stones in the mine fall onto the cable, the first energy-absorbing capsule 21 is impacted and begins to deform and absorb energy, thereby reducing the impact force of the coal blocks and stones on the cable. When the first energy-absorbing capsule 21 is deformed, the pressure inside the first energy-absorbing capsule 21 increases, and the insulating liquid inside it flows through the first pipe 22 to the adjacent first energy-absorbing capsule 21 with lower pressure, converting the impact of the coal blocks and stones on the cable into the kinetic energy of the insulating liquid, further weakening the energy of the impact. The deformation of the first energy-absorbing rubber stick is used for buffering, and the flow of the insulating liquid absorbs the impact energy, thereby protecting the conductor core 1, preventing the conductor core 1 from being subjected to greater impact and damage, and allowing the conductor core 1 to work normally.

[0023] Optionally, the first energy absorbing capsule 21 includes a strength plate 211 and a deformation plate 212 connected to the strength plate 211, and the deformation plate 212 is arranged on the side of the strength plate 211 away from the conductor core 1; the deformation plate 212 can undergo elastic deformation, and a cavity is formed between the deformation plate 212 and the strength plate 211, and the cavity is filled with insulating liquid.

[0024] The material of the strength plate 211 is a hard plastic plate, specifically a PP hard plastic plate, which is called a polypropylene (Polypropylene) hard plate, and is a thermoplastic synthetic resin. Its basic chemical component is propylene monomer, which forms a polymer chain structure through polymerization reaction. The PP hard plastic plate has the characteristics of high mechanical strength, excellent heat resistance, good chemical stability and low water absorption. The strength plate 211 is hard and is not easily deformed when impacted, and has a high structural strength. The deformation plate 212 is made of a rubber material with a certain elasticity, and will undergo elastic deformation when impacted.

[0025] The deformation plate 212 is arranged on the side away from the conductor core 1, and the strength plate 211 is arranged on the side close to the conductor core 1. When stones and coal blocks impact the cable, the pressure inside the first energy absorbing capsule 21 increases, and the deformation plate 212 undergoes elastic deformation and bulges toward the side away from the conductor core 1. The strength plate 211 will not deform significantly due to its own high structural strength. The strength plate 211 can prevent the first energy absorbing capsule 21 from bulging toward the conductor core 1, thereby protecting the conductor core 1.

[0026] Optionally, the first anti-impact mechanism 2 also includes a first coating layer 23; a first energy absorption cavity 231 and a first accommodating groove 232 are provided on the inner wall of the first coating layer 23 close to the conductor core 1; the first energy absorption capsule 21 is arranged in the first energy absorption cavity 231, and a deformation gap is reserved between the deformation plate 212 and the inner wall of the first energy absorption cavity 231; the first pipe 22 is arranged in the first accommodating groove 232.

[0027] The first coating layer 23 covers the first energy absorbing capsule 21 and the first pipe 22. When stones and coal blocks fall on the cable, the impact force is transmitted to the first energy absorbing capsule 21 and the first pipe 22 through the first coating layer 23. The first coating layer 23 absorbs part of the impact force to prevent the impact force from directly acting on the first energy absorbing capsule 21 and the first pipe 22, thereby protecting the first energy absorbing capsule 21 and the first pipe 22.

[0028] A gap is reserved between the deformable plate 212 and the inner wall of the first energy absorbing cavity 231. When the first energy absorbing capsule 21 is impacted and the pressure inside it increases, the insulating liquid in the impacted first energy absorbing capsule 21 enters the adjacent first energy absorbing capsule 21 through the first pipe 22. The insulating liquid in the adjacent first energy absorbing capsule 21 increases, causing the deformable plate 212 to bulge toward the inner wall of the first energy absorbing cavity 231 and finally abut against the inner wall of the first energy absorbing cavity 231. The first energy absorbing cavity 231 can limit the deformation amount of the deformable plate 212 to prevent the deformable plate 212 from being excessively deformed and damaged.

[0029] Optionally, the pressure-resistant and anti-static coal mine cable further comprises a plurality of shaping rings 4 sleeved on the outer circumferential surface of the conductor core 1 , the shaping rings 4 are arranged perpendicular to the axis of the conductor core 1 , and the plurality of shaping rings 4 are evenly distributed along the axial direction of the conductor core 1 .

[0030] The shaping ring 4 has a certain structural strength, and the material of the shaping ring 4 is metal. There is a certain distance between adjacent shaping rings 4. When the impact force brought by coal blocks and stones is transmitted to the conductor core 1, part of the impact force is dispersed to each shaping ring 4, further reducing the impact force on the conductor core 1. At the same time, a certain distance is set between adjacent shaping rings 4. When the cable needs to be bent, since there is a gap reserved between adjacent shaping rings 4, the cable can be bent smoothly, ensuring that the cable can be laid smoothly.

[0031] Optionally, the conductor core 1 includes a conductor fixing member 11 and at least one wire strand 12. The conductor fixing member 11 is fixed inside the first anti-shock mechanism 2; the conductor fixing member 11 is provided with at least one conductor fixing groove 111; the wire strands 12 are inserted into the conductor fixing grooves 111 one by one.

[0032] The wire fixing part 11 is a filler made of rubber material, and the wire fixing part 11 has a certain elasticity. The wire strand 12 is fixed in the wire fixing groove 111 inside the wire fixing part 11. During the production process, the wire fixing part 11 is filled around the wire strand 12 and twisted synchronously. When the impact force is transmitted to the wire core 1 through the first anti-impact mechanism 2, the wire fixing part 11 will be deformed to a certain extent by the impact, so as to reduce the impact force on the wire strand 12.

[0033] Optionally, the pressure-resistant and anti-static coal mine cable also includes a second anti-shock mechanism 5 arranged between the insulating layer 3 and the first anti-shock mechanism 2, the second anti-shock mechanism 5 includes a plurality of second energy-absorbing capsules 51 and a second pipe 52 connecting adjacent second energy-absorbing capsules 51; the second energy-absorbing capsules 51 are filled with insulating liquid, and the second energy-absorbing capsules 51 are elastic; the second energy-absorbing capsules 51 may be deformed when impacted, and the insulating liquid inside enters the adjacent second energy-absorbing capsules 51 through the second pipe 52; the second energy-absorbing capsules 51 are staggered with the first energy-absorbing capsules 21.

[0034] A second anti-shock mechanism 5 is provided between the first anti-shock mechanism 2 and the insulating layer 3, and the first anti-shock mechanism 2 and the second anti-shock mechanism 5 cooperate with each other. A certain space is reserved between adjacent first energy-absorbing capsules 21 in the first anti-shock mechanism 2. A certain space is reserved between adjacent second energy-absorbing capsules 51 in the second anti-shock mechanism 5. The first energy-absorbing capsule 21 and the second energy-absorbing capsule 51 are arranged in a staggered manner. All energy-absorbing capsules are prevented from being arranged on a cylindrical surface, and the energy-absorbing capsules are prevented from having too high a density, resulting in the energy-absorbing capsules not having enough space to deform and absorb energy. The first anti-shock mechanism 2 and the second anti-shock mechanism 5 cooperate with each other to increase the number of energy-absorbing capsules, increase the impact energy that the cable can absorb, and reduce the impact of stones and coal blocks on the cable.

[0035] Optionally, the second energy absorbing capsule 51 has the same structure as the first energy absorbing capsule 21 .

[0036] Optionally, the second anti-impact mechanism 5 also includes a second coating layer 53; a second energy absorption cavity 531 and a second accommodating groove 532 are provided on the inner wall of the second coating layer 53 close to the conductor core 1; the second energy absorption capsule 51 is arranged in the second energy absorption cavity 531, and a gap is reserved between the deformation plate 212 and the inner wall of the second energy absorption cavity 531; the second pipe 52 is arranged in the second accommodating groove 532.

[0037] The second coating layer 53 covers the second energy absorbing capsule 51 and the second pipe 52. When stones and coal blocks fall on the cable, the impact force is transmitted to the second energy absorbing capsule 51 and the second pipe 52 through the second coating layer 53. The second coating layer 53 absorbs part of the impact force to prevent the impact force from directly acting on the second energy absorbing capsule 51 and the second pipe 52, thereby protecting the second energy absorbing capsule 51 and the second pipe 52.

[0038] A gap is reserved between the deformable plate 212 and the inner wall of the second energy absorbing cavity 531. When the second energy absorbing capsule 51 is impacted and the pressure inside it increases, the insulating liquid in the impacted second energy absorbing capsule 51 enters the adjacent second energy absorbing capsule 51 through the second pipe 52. The insulating liquid in the adjacent second energy absorbing capsule 51 increases, causing the deformable plate 212 to bulge toward the inner wall of the second energy absorbing cavity 531 and finally abut against the inner wall of the second energy absorbing cavity 531. The second energy absorbing cavity 531 can limit the deformation amount of the deformable plate 212 to prevent the deformable plate 212 from being excessively deformed and damaged.

[0039] Optionally, the pressure-resistant and anti-static coal mine cable also includes an anti-static layer 6 covering the outside of the insulating layer 3, the anti-static layer 6 includes a wire mesh 61 and a grounding wire 62 connected to the wire mesh 61; the wire mesh 61 is covered on the outside of the insulating layer 3, and the grounding wire 62 is grounded.

[0040] The wire mesh 61 is wrapped around the outside of the insulating layer 3. When the dust in the mine rubs and collides with the insulating layer 3 for a long time, the static electricity accumulated on the insulating layer 3 is transmitted to the ground through the wire mesh 61 and the grounding wire 62, avoiding excessive static electricity accumulation on the insulating layer 3 and eliminating the safety hazard of static electricity accumulation on the insulating layer 3.

[0041] Optionally, the antistatic layer 6 further includes a base layer 63 , on which a mounting groove is provided, and the wire mesh 61 is fixed in the mounting groove.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A compression-resistant and anti-static cable for coal mines, characterized in that: include: Conductor core (1); A first impact-resistant mechanism (2) is coated on the outside of the conductor core (1); the first impact-resistant mechanism (2) comprises a plurality of first energy-absorbing capsules (21) and a first pipe (22) connecting adjacent first energy-absorbing capsules (21); the first energy-absorbing capsules (21) are filled with insulating liquid; the first energy-absorbing capsules (21) are deformed when impacted, and the insulating liquid inside flows through the first pipe (22) in adjacent first energy-absorbing capsules (21) to absorb energy; and An insulating layer (3) is coated on the outside of the first anti-impact mechanism (2).

2. The compression-resistant and antistatic coal mine cable according to claim 1, characterized in that: The first energy absorbing capsule (21) comprises a strength plate (211) and a deformation plate (212) connected to the strength plate (211), wherein the deformation plate (212) is arranged on a side of the strength plate (211) away from the conductor core (1); the deformation plate (212) can undergo elastic deformation, and a cavity is formed between the deformation plate (212) and the strength plate (211), wherein the cavity is filled with the insulating liquid.

3. The compression-resistant and antistatic cable for coal mines according to claim 2, characterized in that: The first anti-impact mechanism (2) further comprises a first coating layer (23); a first energy absorbing cavity (231) and a first containing groove (232) are arranged on the inner wall of the first coating layer (23) close to the conductor core (1); the first energy absorbing capsule (21) is arranged in the first energy absorbing cavity (231), and a deformation gap is reserved between the deformation plate (212) and the inner wall of the first energy absorbing cavity (231); and the first pipe (22) is arranged in the first containing groove (232).

4. The compression-resistant and antistatic cable for coal mines according to claim 1, characterized in that: It also comprises a plurality of shaping rings (4) sleeved on the outer circumferential surface of the conductor core (1), wherein the shaping rings (4) are arranged perpendicular to the axis of the conductor core (1), and the plurality of shaping rings (4) are evenly distributed along the axial direction of the conductor core (1).

5. The compression-resistant and antistatic cable for coal mines according to claim 4, characterized in that: The conductor core (1) comprises: A wire fixing member (11) is provided with at least one wire fixing groove (111); wherein the first energy absorbing capsule (21) and the first pipe (22) are wrapped around the outside of the wire fixing member (11); and At least one wire strand (12) is inserted into the wire fixing groove (111) in a one-to-one correspondence.

6. The compression-resistant and antistatic coal mine cable according to claim 1, characterized in that: The invention also comprises a second anti-shock mechanism (5) arranged between the insulating layer (3) and the first anti-shock mechanism (2), wherein the second anti-shock mechanism (5) comprises a plurality of second energy-absorbing capsules (51) and a second pipe (52) connecting adjacent second energy-absorbing capsules (51); the second energy-absorbing capsules (51) are filled with insulating liquid; the second energy-absorbing capsules (51) can be deformed when impacted, and the insulating liquid inside flows through the second pipe (52) in adjacent second energy-absorbing capsules (51) to absorb energy; the second energy-absorbing capsules (51) and the first energy-absorbing capsules (21) are arranged in a staggered manner.

7. The compression-resistant and antistatic cable for coal mines according to claim 6, characterized in that: The second energy absorbing capsule (51) has the same structure as the first energy absorbing capsule (21).

8. The compression-resistant and antistatic cable for coal mines according to claim 6, characterized in that: The second impact resistance mechanism (5) further comprises a second coating layer (53); a second energy absorption cavity (531) and a second containing groove (532) are arranged on the inner wall of the second coating layer (53) close to the conductor core (1); the second energy absorption capsule (51) is arranged in the second energy absorption cavity (531), and a deformation gap is reserved between the deformation plate (212) and the inner wall of the second energy absorption cavity (531); and the second pipe (52) is arranged in the second containing groove (532).

9. The compression-resistant and antistatic cable for coal mines according to claim 1, characterized in that: It also includes an antistatic layer (6) covering the outside of the insulating layer (3), the antistatic layer (6) including a wire mesh (61) and a grounding wire (62) connected to the wire mesh (61); the wire mesh (61) covers the outside of the insulating layer (3), and the grounding wire (62) is grounded.

10. The compression-resistant and antistatic cable for coal mines according to claim 9, characterized in that: The antistatic layer (6) further comprises a base layer (63), the base layer (63) being provided with a mounting groove, and the wire mesh (61) being fixed in the mounting groove.

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