Irradiation crosslinking B-grade polyolefin wire

Abstract

The utility model discloses an irradiation crosslinking B1-level polyolefin wire, which comprises a conductor structure, and a buffer structure is sleeved outside the conductor structure. The outer portion of the buffer structure is sleeved with a fireproof mineral insulation layer, the outer portion of the fireproof mineral insulation layer is sleeved with a reinforcing structure, the outer portion of the reinforcing structure is sleeved with an outer protection structure used for insulation, and the outer protection structure comprises a macromolecule insulation layer. And anti-slip strips. According to the utility model, the arrangement mode that the reinforcing structure and the outer protection structure are matched is utilized, the anti-slip performance of the polymer insulating layer is enhanced conveniently through the protruding arrangement of the anti-slip strips, and the grooves are formed, so that on one hand, deformation space is provided for deformation of the wire when the wire is pressed, and on the other hand, the anti-slip performance is improved. And through the arrangement of the grooves, the anti-skid performance of the electric wire can be further improved, so that external substances can be clamped into the grooves for skid resistance, the anti-skid performance of the electric wire is higher, and the electric wire is not easy to roll at will.

Description

Technical Field

[0001] The utility model relates to the technical field of wires and cables, in particular to a radiation cross-linked B1-level polyolefin wire. Background Art

[0002] Special cables such as fire-resistant cables have grown in competition and have formed a certain scale after decades of development. Driven by global economic integration, cable companies have entered the most important perspectives of promoting the healthy development of the industry, such as scientific management, core technology, and core products, in order to avoid unfair competition of low quality and low end. At present, fire-resistant and flame-retardant cable products have formed a scaled form, and the overall improvement of product technology and product quality, as well as the standardization of services, have been increasingly accepted and affirmed by the industry and users. It is believed that with the continuous improvement of industrial concentration, the productivity generated by scale will be fully reflected in the market, and cost-effective products plus standardized services will surely occupy the vast majority of the cable market share.

[0003] In the prior art, the application number is 201820808490.1, and the name is a flame-retardant and fire-resistant wire, including a conductor and an insulating layer covering the conductor. The conductor is composed of a bundle of copper wires; the insulating layer includes a fire-resistant layer and a flame-retardant layer; the fire-resistant layer adopts two layers of single-sided slow-burning mica tapes with a thickness of 0.12 mm and is wrapped on the outer surface of the conductor; the flame-retardant layer adopts radiation cross-linked polyolefin and is extruded on the outer surface of the fire-resistant layer.

[0004] The flame-retardant and fire-resistant wire of the utility model has good flame-retardant and fire-resistant properties, and can maintain normal operation for a certain period of time after a fire occurs. However, the flame-retardant cable has only a double layer of polymer material on the outside, which ensures the flame-retardant effect of the electrical property. However, the relatively simple circular design has low anti-slip properties and is easy to roll randomly. Utility Model Content

[0005] The utility model aims to provide a radiation cross-linked B1 grade polyolefin electric wire to solve the problems raised in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical solution: a radiation cross-linked B-grade polyolefin wire, comprising:

[0007] A conductor structure, wherein a buffer structure is provided on the outside of the conductor structure;

[0008] The outer sleeve of the buffer structure is provided with a fire-resistant mineral insulation layer, the outer sleeve of the fire-resistant mineral insulation layer is provided with a reinforcement structure, the outer sleeve of the reinforcement structure is provided with an outer protective structure for insulation, and the outer protective structure includes:

[0009] A polymer insulating layer, the polymer insulating layer is wrapped around the outer surface of the reinforcement structure, and the polymer insulating layer is a polymer material obtained by radiation cross-linking;

[0010] The anti-slip strip is attached to the outer wall of the polymer insulation layer.

[0011] Preferably, the number of the anti-slip strips is at least three, and the anti-slip strips are arranged in a ring array outside the polymer insulation layer.

[0012] Preferably, the outer protective structure further comprises:

[0013] The inner wall of the groove is in an arc shape, and the groove is opened on the outer wall of the polymer insulating layer in a ring array.

[0014] Preferably, the conductor structure comprises:

[0015] Copper conductor, the copper conductor is made of copper;

[0016] The insulating wrapping layer is wrapped around the outside of the copper conductor and is made of rubber.

[0017] Preferably, the buffer structure comprises:

[0018] A support frame, wherein the support frame is a multi-faceted hollow columnar structure, and the number of corners of the support frame is at least three, and the conductor structure is tangentially arranged inside the support frame;

[0019] The buffer filler is filled inside and outside the support frame.

[0020] Preferably, the reinforcement structure comprises:

[0021] a first insulating layer, the first insulating layer being wrapped around the outer surface of the refractory mineral insulating layer;

[0022] A second partition layer, wherein the second partition layer is sleeved outside the first partition layer, and a gap is provided between an inner wall of the second partition layer and an outer wall of the first partition layer;

[0023] A plurality of reinforcing columns are arranged in the gap between the first insulating layer and the second insulating layer.

[0024] Preferably, the plurality of reinforcing columns are arranged in a ring array, and the axis of the reinforcing columns is parallel to the axis of the conductor structure.

[0025] Technical effects and advantages of the utility model:

[0026] The utility model utilizes a setting mode in which a reinforcement structure and an outer protective structure are matched, and the anti-skid performance of the polymer insulating layer is enhanced by the protruding setting of the anti-skid strip. The opening of the groove provides a deformation space for the deformation of the wire when it is compressed, and on the other hand, the opening of the groove can further increase the anti-skid performance of the wire, so that foreign substances can be stuck in the interior of the groove for anti-skid, so that the anti-skid performance of the wire is higher and it is not easy to roll at will. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0028] Figure 2 It is a partial structural schematic diagram of the strengthening structure of the utility model.

[0029] In the figure: 1. conductor structure; 11. copper conductor; 12. insulating wrapping layer; 2. buffer structure; 21. support frame; 22. buffer filler; 3. refractory mineral insulating layer; 4. reinforcement structure; 41. first partition layer; 42. second partition layer; 43. reinforcement column; 5. outer protection structure; 51. polymer insulating layer; 52. anti-slip strip; 53. groove. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] The utility model provides Figure 1-2The radiation cross-linked B1 grade polyolefin wire shown in the figure comprises: a conductor structure 1, the outer sleeve of the conductor structure 1 is provided with a buffer structure 2; the outer sleeve of the buffer structure 2 is provided with a refractory mineral insulation layer 3, the outer sleeve of the refractory mineral insulation layer 3 is provided with a reinforcement structure 4, the outer sleeve of the reinforcement structure 4 is provided with an outer protective structure 5 for insulation, the outer protective structure 5 comprises: a polymer insulation layer 51, the polymer insulation layer 51 is wrapped around the outer surface of the reinforcement structure 4, and the polymer insulation layer 51 is a polymer material obtained by radiation cross-linking; an anti-slip strip 52, the anti-slip strip 52 is attached to the outer wall of the polymer insulation layer 51, the number of the anti-slip strips 52 is at least three, and the anti-slip strips 52 are arranged in an annular array outside the polymer insulation layer 51, and the outer protective structure 5 also comprises: a groove 53, the inner wall of the groove 53 is arc-shaped, and the groove 53 is opened in the polymer insulation layer 51 in an annular array. The outer wall of the sub-insulating layer 51 is convenient for enhancing the anti-slip performance of the polymer insulating layer 51 through the protruding setting of the anti-slip strip 52. The opening of the groove 53, on the one hand, provides a deformation space for the deformation of the wire when it is compressed. On the other hand, the opening of the groove 53 can further increase the anti-slip performance of the wire, so that foreign substances can be stuck in the interior of the groove 53 for anti-slip. The manufacturing process of the radiation cross-linked insulating material of the polymer insulating layer 51 is to put polymer materials such as polyethylene and polypropylene into a radiation chamber, and after the irradiation of high-energy electron beams or y-rays, the molecular chains undergo cross-linking reactions to form a three-dimensional network structure, thereby improving the physical and chemical properties of the polymer insulating layer 51 material, so that the polymer insulating layer 51 has high thermal stability and mechanical strength during use, can withstand high temperature, high pressure and strong electric field, and is not easy to age and crack.

[0032] Specifically, the conductor structure 1 includes: a copper conductor 11, the material of the copper conductor 11 is copper; an insulating wrapping layer 12, the insulating wrapping layer 12 is wrapped around the outside of the copper conductor 11, and the insulating wrapping layer 12 is made of rubber. The copper conductor 11 can be conductive, and the insulating wrapping layer 12 is convenient for wrapping and protecting the copper conductor 11, and also convenient for insulating the copper conductor 11 to prevent leakage.

[0033] Furthermore, the buffer structure 2 includes: a support frame 21, which is a multi-faceted hollow columnar structure, and the number of edges and corners of the support frame 21 is at least three, and the conductor structure 1 is tangentially arranged inside the support frame 21; a buffer filler 22, the buffer filler 22 is filled inside and outside the support frame 21, and the support frame 21 is made of steel, which is convenient for supporting and protecting the conductor structure 1 inside it, increasing the strength of the wires, and preventing the wires from undergoing large deformation due to squeezing. The buffer filler 22 is made of fine sand, which is convenient for buffering and shaping the support frame 21, and is also convenient for covering the conductor structure 1 to isolate oxygen and assist in fire extinguishing when a fire occurs in the wires.

[0034] Specifically, the reinforcement structure 4 includes: a first insulation layer 41, which is wrapped around the outer surface of the refractory mineral insulation layer 3; a second insulation layer 42, which is sleeved on the outside of the first insulation layer 41, and there is a gap between the inner wall of the second insulation layer 42 and the outer wall of the first insulation layer 41; a reinforcement column 43, wherein a plurality of reinforcement columns 43 are arranged in the gap between the first insulation layer 41 and the second insulation layer 42, and the plurality of reinforcement columns 43 are arranged in a circular array, and the axis of the reinforcement column 43 is parallel to the axis of the conductor structure 1. By sleeve connection between the first insulation layer 41 and the second insulation layer 42, it is convenient to provide installation space for the installation of the reinforcement column 43. By reinforcing the column 43, it is convenient to enhance the strength of the wire again. The gap between the first insulation layer 41, the second insulation layer 42 and the reinforcement column 43 is filled with refractory filler. The refractory filler can be aluminum foil fireproof and heat-insulating cotton to block combustion, further improve the fire resistance of the reinforcement structure 4, and use this wire more safely.

[0035] Index test data of polymer insulation layer 51:

[0036] 1. Cable combustion performance level is excellent:

[0037] Flame spread FS ≤ 1.5m;

[0038] Heat release rate peak HRR peak ≤ 30kW;

[0039] The total heat release within 1200S of fire is THR1200≤15MJ;

[0040] Combustion growth rate index FIGRA ≤ 150W / s;

[0041] The peak smoke production rate is ≤0.25m2 / s;

[0042] The total amount of smoke produced within 1200S of the fire is TSP1200≤400m2;

[0043] Smoke density ≥ 60%;

[0044] Vertical flame spread ≤425mm.

[0045] After burning at 950℃×90min, the fire resistance grade can reach the A-level standard requirement of GB / T12666.6, that is, burning in a flame of 950~1000℃ for 90min;

[0046] 2. The raw materials and auxiliary materials used in the manufacture of cables are environmentally friendly materials that do not pollute the surrounding environment; the cable materials do not contain halogens such as chlorine, bromine, and fluorine, and will not produce harmful and corrosive gases in emergency situations (such as electrical accidents, fires).

[0047] 3. It produces little smoke when burning, which can effectively increase the escape rate of trapped people when a fire occurs, and has good flame retardant properties.

[0048] 4. It does not contain heavy metals such as lead and cadmium that can cause harmful effects on the environment, does not contain environmental hormones, and does not pollute the soil.

[0049] 5. Cables can be recycled and reused after being discarded, and will not cause harm to the environment when buried or incinerated.

[0050] The conductor of the wire has the characteristics of ensuring good and safe electrical performance and mechanical and physical properties, and its combustion grade meets the B1 standard requirements of GB31247.

[0051] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A radiation cross-linked B1 grade polyolefin electric wire, comprising: A conductor structure (1), wherein a buffer structure (2) is provided on the outside of the conductor structure (1); The invention is characterized in that: the outer sleeve of the buffer structure (2) is provided with a fire-resistant mineral insulation layer (3), the outer sleeve of the fire-resistant mineral insulation layer (3) is provided with a reinforcement structure (4), the outer sleeve of the reinforcement structure (4) is provided with an outer protective structure (5) for insulation, and the outer protective structure (5) comprises: A polymer insulating layer (51), the polymer insulating layer (51) is wrapped around the outer surface of the reinforcing structure (4), and the polymer insulating layer (51) is a polymer material obtained by radiation cross-linking; An anti-slip strip (52) is attached to the outer wall of the polymer insulating layer (51).

2. The radiation cross-linked B1 grade polyolefin electric wire according to claim 1, characterized in that: The number of the anti-slip strips (52) is at least three, and the anti-slip strips (52) are arranged in a ring array outside the polymer insulating layer (51).

3. The radiation cross-linked B1 grade polyolefin electric wire according to claim 1, characterized in that: The outer protective structure (5) further comprises: The groove (53) has an inner wall in an arc shape, and the grooves (53) are arranged in a ring array on the outer wall of the polymer insulating layer (51).

4. The radiation cross-linked B1 grade polyolefin electric wire according to claim 1, characterized in that: The conductor structure (1) comprises: A copper conductor (11), wherein the copper conductor (11) is made of copper; An insulating wrapping layer (12), wherein the insulating wrapping layer (12) is wrapped around the outside of the copper conductor (11), and the insulating wrapping layer (12) is made of rubber.

5. The radiation cross-linked B1 grade polyolefin electric wire according to claim 1, characterized in that: The buffer structure (2) comprises: A support frame (21), the support frame (21) being a multi-faceted hollow columnar structure, and the number of corners of the support frame (21) is at least three, and the conductor structure (1) is tangentially arranged inside the support frame (21); A buffer filler (22), wherein the buffer filler (22) is filled inside and outside the support frame (21).

6. The radiation cross-linked B1 grade polyolefin electric wire according to claim 1, characterized in that: The reinforcement structure (4) comprises: A first insulating layer (41), the first insulating layer (41) being wrapped around the outer surface of the refractory mineral insulating layer (3); A second insulating layer (42), wherein the second insulating layer (42) is sleeved outside the first insulating layer (41), and a gap is provided between an inner wall of the second insulating layer (42) and an outer wall of the first insulating layer (41); Reinforcement columns (43), a plurality of the reinforcement columns (43) are arranged in the gap between the first insulation layer (41) and the second insulation layer (42).

7. The radiation cross-linked B1 grade polyolefin electric wire according to claim 6, characterized in that: The plurality of reinforcing columns (43) are arranged in a ring array, and the axes of the reinforcing columns (43) are parallel to the axis of the conductor structure (1).

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