Tensile power cable for mine mobile electric equipment

Abstract

The utility model discloses a tensile power cable for mine mobile electric equipment. The tensile power cable comprises a cable core, and a belting layer, an inner sheath layer, a fiber woven reinforcing layer and an outer sheath layer which are sequentially coated outside the cable core from inside to outside, the cable core is provided with a tensile reinforcing core I, a plurality of power insulation wire cores, at least one ground wire core and at least one monitoring wire core, and the tensile reinforcing core I is arranged at the center of the cable core; the monitoring wire core is mainly composed of a second tensile reinforcing core, a first copper wire conductor layer braided and formed outside the second tensile reinforcing core, and a monitoring insulating layer extruded outside the first copper wire conductor layer. According to the utility model, the technical requirement that the power cable is used in a normal working condition environment is met, and the tensile property is more excellent.

Description

Technical Field

[0001] The utility model relates to a cable, in particular to a tensile power cable used for mobile power equipment in mines, such as an electric shovel. Background Art

[0002] In the operation of open-pit mines, mobile electrical equipment is involved, such as electric shovels. Due to their mobility in the mine environment, these mobile electrical equipment need to be connected to the power source through matching power cables to achieve power supply. Therefore, power cables are indispensable supporting facilities in open-pit mine operations.

[0003] Due to the special working conditions of open-pit mines and the special characteristics of mobile power equipment, the power cables connected to mobile power equipment in the mine are laid in a dragging manner in a complex and harsh ground environment. Therefore, power cables suitable for mobile power equipment in mines should have good wear resistance and tensile resistance, such as the technology named "A flexible anti-torsion medium-voltage dragging cable for mines", announcement number CN 220584960 U, announcement date March 12, 2024, and "A soft dragging cable for mines", announcement number CN 210429349, announcement date April 28, 2020, etc., published in Chinese patent documents.

[0004] The power cables used in mobile power equipment in mines are equipped with signal cores in the cable core structure, such as communication cores and / or monitoring cores, in order to meet the requirements of operation guarantee and communication control. Since the signal cores have a small conductor cross-section, are fragile in tensile performance, and have low tensile strength, the power cables are easily dragged and stretched during the displacement of the mobile power equipment, which makes it easy for the signal cores in the cable core to break due to insufficient tensile strength. The damaged power cables can only be replaced as a whole.

[0005] In summary, in view of the particularity of the working environment of open-pit mines and the particularity of the operation of mobile electrical equipment, it is necessary to design a power cable for electrical equipment with higher overall tensile strength. Utility Model Content

[0006] The technical purpose of the utility model is to provide a power cable for mobile power equipment in mines with higher overall tensile strength in view of the particularities of the working environment of the open-pit mine and the operation of mobile power equipment, as well as the deficiencies of the prior art.

[0007] The technical purpose of the utility model is achieved through the following technical solutions: A tensile power cable for mobile power equipment in mines, comprising a cable core and a tape layer, an inner sheath layer, a fiber braided reinforcement layer and an outer sheath layer sequentially coated on the outside of the cable core from the inside to the outside;

[0008] The cable core has a tensile strength core 1, a plurality of power insulation cores, at least one ground wire core, and at least one monitoring wire core, and the tensile strength core 1 is arranged at the center of the cable core;

[0009] The monitoring wire core is mainly composed of a second tensile strength core, a first copper wire conductor layer woven and formed outside the second tensile strength core, and a monitoring insulation layer extruded outside the first copper wire conductor layer.

[0010] The cable core of the above-mentioned technical measures has a tape layer, an inner sheath layer, a fiber braided reinforcement layer and an outer sheath layer reasonably arranged on the outside, forming a multi-layer reliable protection for the cable core; a tensile reinforcement core 1 is provided at the center of the cable core, which enhances the tensile strength of the power cable and makes it less likely to break during large displacement operations of electrical equipment; and a tensile reinforcement core 2 is provided in the monitoring core, which further improves the tensile strength of the power cable and has strong tensile resistance.

[0011] The second tensile strength core of the monitoring line core is a fiber rope structure;

[0012] There is also an isolation layer 2 between the second tensile strength core of the monitoring line core and the first copper wire conductor layer;

[0013] The second isolation layer is an extruded structure of EPDM insulation rubber outside the second tensile strength core.

[0014] The reinforcing core 2 of the monitoring line core of the above technical measures is a fiber rope structure, and there is an isolation layer 2 of EPDM insulating rubber between the reinforcing core 2 and the copper wire conductor, which makes it more stable during operation and not prone to fatigue due to repeated stretching and bending, which may cause the monitoring line core to break. It can effectively monitor electrical equipment and has high tensile strength.

[0015] The cable core also has at least one communication wire core.

[0016] The communication line core is mainly composed of a tensile strength core three, a copper wire conductor layer two braided and formed outside the tensile strength core three, and a communication insulation layer extruded outside the copper wire conductor layer two.

[0017] The tensile strength core three of the communication line core is a fiber rope structure;

[0018] There is also an isolation layer 3 between the tensile strength core 3 of the communication line core and the copper wire conductor layer 2;

[0019] The isolation layer three is an extruded structure of EPDM insulation rubber outside the tensile reinforcement core three.

[0020] The cable of the above technical measures has a communication core, which ensures the signal transmission and communication functions between devices. The reinforcing core 2 of the communication core of the above technical measures is a fiber rope structure, and there is an isolation layer 2 of EPDM insulating rubber between the reinforcing core 2 and the copper wire conductor, which makes it more stable during operation and not easy to fatigue due to multiple stretching and bending, resulting in breakage of the communication core, and has high tensile strength.

[0021] The tensile strength core in the cable core is a fiber rope structure;

[0022] The tensile strength core in the cable core has an isolation layer formed by extrusion of a semi-conductive shielding rubber compound.

[0023] The reinforcing core of the above technical measures adopts a fiber rope structure, which increases the overall tensile strength of the cable, and the reinforcing core has an isolation layer extruded with a semi-conductive shielding rubber compound on the outside, which improves the cable's anti-interference ability in signal transmission during operation and has high tensile strength.

[0024] The power insulation core is mainly composed of a power conductor with a copper wire twisted structure, a power insulation layer with ethylene propylene rubber extruded on the outside of the power conductor, and a power shielding layer with aluminum-plastic composite tape wrapped around the outside of the power insulation layer. The cable of this technical measure has good conductivity and will not cause signal interference to the communication signal during the power supply process, and has good stability.

[0025] The ground wire core is mainly composed of a ground conductor with a copper wire structure and a ground insulation layer formed by extruding ethylene propylene rubber on the outside of the ground conductor. This technical measure ensures the safety of the cable power supply process, and has good safety.

[0026] The cable core is a twisted structure with a twisted pitch-diameter ratio of 12 to 20 times. This technical measure enables the inner core of the cable to form a stable cable core structure, with a tighter arrangement and a more rounded cable core.

[0027] The tape layer is a structure in which at least one layer of non-woven fabric is overlapped and wrapped around the outside of the cable core;

[0028] The inner sheath layer is an extruded structure of a polyurethane elastomer material outside the wrapping layer;

[0029] The fiber braided reinforcement layer is a braided structure of aramid fibers outside the inner sheath layer;

[0030] The outer sheath layer is an extruded structure of a polyurethane elastomer material outside the fiber braided reinforcement layer.

[0031] The above technical measures form multi-layer reliable protection for the cable core, greatly improving the pressure resistance and wear resistance of the cable. The use of polyurethane elastic material greatly increases the wear resistance and overall tensile resistance of the cable.

[0032] The beneficial technical effect of the utility model is that the above-mentioned technical measures are aimed at the particularities of the above-mentioned open-pit mine working environment and the operation of mobile electrical equipment, as well as the shortcomings of the existing technology. While meeting the technical requirements for the use of power cables under normal working conditions, they have better tensile properties and longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the utility model.

[0034] Figure 2 This is a structural diagram of the monitoring line core of the utility model.

[0035] Figure 3 This is a schematic diagram of the communication line core structure of the utility model.

[0036] The meaning of the codes in the figure are as follows: 1—tensile reinforcement core one; 11—isolation layer one; 2—power insulation core; 21—power conductor; 22—power insulation layer; 23—power shielding layer; 3—ground wire core; 31—ground conductor; 32—ground insulation layer; 4—monitoring core; 41—tensile reinforcement core two; 42—isolation layer two; 43—copper wire conductor layer one; 44—monitoring insulation layer; 5—communication core; 51—tensile reinforcement core three; 52—isolation layer three; 53—copper wire conductor layer two; 44—communication insulation layer; 6—tape layer; 7—inner sheath layer; 8—fiber braiding reinforcement layer; 9—outer sheath layer. DETAILED DESCRIPTION

[0037] The utility model relates to a low-voltage power cable, specifically a tensile power cable for mobile power equipment in mines. Figure 1 , Figure 2 and Figure 3 The technical solution of the utility model is clearly and in detail explained. Example

[0038] See also Figure 1 , Figure 2 and Figure 3 As shown, a tensile-resistant power cable for mobile electrical equipment in mines comprises a cable core and a tape layer 6, an inner sheath layer 7, a fiber braided reinforcement layer 8 and an outer sheath layer 9 which are sequentially coated on the outside of the cable core from the inside to the outside.

[0039] The cable core comprises a tensile strength core 1, three power insulation cores 2, a ground core 3, a monitoring core 4 and a communication core 5.

[0040] The tensile strength core 1 is arranged at the center of the cable core; the tensile strength core 1 is a fiber rope structure, and the fiber rope is strong, which can effectively increase the overall tensile strength of the cable; the tensile strength core 1 in the cable core has an isolation layer 11 formed by extrusion of semi-conductive shielding rubber, which reduces the interference to signal transmission in the working state of the cable. Further, the diameter of the tensile strength core 1 is about 3.0 mm.

[0041] Three power insulating cores 2 are twisted on the outer wall of the isolation layer 11 of the above-mentioned tensile reinforcement core 1, and the twisted pitch-diameter ratio is 12 times; the above-mentioned power insulating core 2 is mainly composed of a power conductor 21 with a copper wire twisted structure, a power insulating layer 22 extruded with ethylene propylene insulating rubber on the outside of the power conductor 21, and a power shielding layer 23 wrapped with an aluminum-plastic composite tape on the outside of the power insulating layer 22.

[0042] A ground wire core 3, a monitoring wire core 4 and a communication wire core 5 are arranged in sequence in the twisted side gaps of the three power insulating cores 2, forming a stable cable core structure.

[0043] The ground wire core 3 is mainly composed of a ground conductor 31 of copper wire structure and a ground insulation layer 32 of EPDM insulation rubber extruded outside the ground conductor 31. Furthermore, the conductor of the ground wire core 3 is the fifth type of soft copper conductor in the standard GB / T 3956.

[0044] The monitoring wire core 4 is mainly composed of a second tensile strength core 41 , a copper wire conductor layer 43 woven and formed outside the second tensile strength core 41 , and a monitoring insulation layer 44 extruded outside the copper wire conductor layer 43 .

[0045] The second tensile strength core 41 of the monitoring core is a fiber rope structure; there is also an isolation layer 42 between the second tensile strength core 41 of the monitoring core and the first copper wire conductor layer 43; the isolation layer 42 is an extruded structure of EPDM insulation rubber outside the second tensile strength core 41. Furthermore, the conductor of the monitoring core 4 is the fifth type of soft copper conductor in the standard GB / T 3956.

[0046] The communication line core 5 is mainly composed of a third tensile strength core 51 , a second copper wire conductor layer 53 woven and formed outside the third tensile strength core 51 , and a communication insulation layer 54 extruded outside the second copper wire conductor layer 53 .

[0047] The tensile strength core 3 51 of the communication core is a fiber rope structure; there is an isolation layer 3 52 between the tensile strength core 3 51 of the communication core and the copper wire conductor layer 2 53; the isolation layer 3 52 is an extruded structure of EPDM insulation rubber outside the tensile strength core 3 51. Furthermore, the conductor of the communication core 5 is the fifth type of soft copper conductor in the standard GB / T 3956.

[0048] The tape layer 6 is a structure in which at least one layer of non-woven fabric is wrapped around the outside of the cable core, which is beneficial to the rounding of the cable core twisted structure and avoids the appearance of a serpentine twisted structure.

[0049] The inner sheath layer 7 is an extruded structure of a polyurethane elastomer material outside the wrapping layer 6, which is beneficial to improving the tensile strength of the cable.

[0050] The fiber braided reinforcement layer 8 is a braided structure of aramid yarn with a fiber count of about 3000D outside the inner sheath layer 7, which can effectively disperse the external concentrated stress borne by the cable and improve the compression and tension resistance of the cable.

[0051] The outer sheath layer 9 is an extruded structure of a polyurethane elastomer material outside the fiber braided reinforcement layer 8, which further improves the overall tensile strength of the cable. Example

[0052] See also Figure 1 , Figure 2 and Figure 3 As shown, a tensile-resistant power cable for mobile electrical equipment in mines comprises a cable core and a tape layer 6, an inner sheath layer 7, a fiber braided reinforcement layer 8 and an outer sheath layer 9 which are sequentially coated on the outside of the cable core from the inside to the outside.

[0053] The cable core comprises a tensile strength core 1 , five power insulation cores 2 , a ground core 3 , two monitoring cores 4 and two communication cores 5 .

[0054] The tensile strength core 1 is arranged at the center of the cable core; the tensile strength core 1 is a fiber rope structure, and the fiber rope is strong, which can effectively increase the overall tensile strength of the cable; the tensile strength core 1 in the cable core has an isolation layer 11 formed by extrusion of semi-conductive shielding rubber, which reduces the interference to signal transmission in the working state of the cable. Furthermore, the diameter of the tensile strength core 1 is about 5.0 mm

[0055] Five power insulating cores 2 are twisted on the outer wall of the isolation layer 11 of the above-mentioned tensile reinforcement core 1, and the twisted pitch-diameter ratio is 20 times; the above-mentioned power insulating core 2 is mainly composed of a power conductor 21 with a copper wire twisted structure, a power insulating layer 22 extruded with ethylene propylene insulating rubber on the outside of the power conductor 21, and a power shielding layer 23 wrapped with an aluminum-plastic composite tape on the outside of the power insulating layer 22.

[0056] The twisted side gaps of the three power insulating cores 2 are arranged in sequence with a ground wire core 3, a monitoring wire core 4, a communication wire core 5, a ground wire core 3 and a monitoring wire core 4, forming a stable cable core structure. The copper wire is a copper single wire in GB / T 3953.

[0057] The ground wire core 3 is mainly composed of a ground conductor 31 with a copper wire structure and a ground insulation layer 32 made of EPDM insulation rubber extruded around the outside of the ground conductor 31 .

[0058] The monitoring wire core 4 is mainly composed of a second tensile strength core 41 , a copper wire conductor layer 43 woven and formed outside the second tensile strength core 41 , and a monitoring insulation layer 44 extruded outside the copper wire conductor layer 43 .

[0059] The second tensile strength core 41 of the monitoring wire core is a fiber rope structure; there is also an isolation layer 42 between the second tensile strength core 41 of the monitoring wire core and the copper wire conductor layer 43; the second isolation layer 42 is an extruded structure of EPDM insulation rubber outside the second tensile strength core 41.

[0060] The communication line core 5 is mainly composed of a tensile strength core 3 51, a copper wire conductor layer 2 53 braided and formed outside the tensile strength core 3 51, and a communication insulation layer 54 extruded outside the copper wire conductor layer 2 53. Furthermore, the conductor is the fifth type of soft copper conductor in the standard GB / T 3956.

[0061] The tensile strength core 3 51 of the communication core is a fiber rope structure; there is an isolation layer 3 52 between the tensile strength core 3 51 of the communication core and the copper wire conductor layer 2 53; the isolation layer 3 52 is an extruded structure of EPDM insulation rubber outside the tensile strength core 3 51. Furthermore, the conductor is the fifth type of soft copper conductor in the standard GB / T 3956.

[0062] The tape layer 6 is a structure in which at least one layer of non-woven fabric is wrapped around the outside of the cable core, which is beneficial to the rounding of the cable core twisted structure and avoids the appearance of a serpentine twisted structure.

[0063] The inner sheath layer 7 is an extruded structure of a polyurethane elastomer material outside the wrapping layer 6, which is beneficial to improving the tensile strength of the cable.

[0064] The fiber braided reinforcement layer 8 is a braided structure of aramid yarn with a fiber count of about 5000D outside the inner sheath layer 7, which can effectively disperse the external concentrated stress borne by the cable and improve the compression and tension resistance of the cable.

[0065] The outer sheath layer 9 is an extruded structure of a polyurethane elastomer material outside the fiber braided reinforcement layer 8, which further improves the overall tensile strength of the cable.

[0066] The above specific technical solutions are only used to illustrate the present invention, rather than to limit it.

[0067] Although the present invention has been described in detail with reference to the above-mentioned specific technical solutions, those skilled in the art should understand that they can still modify the above-mentioned specific technical solutions, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the present invention.

Claims

1. A tensile-resistant power cable for mobile electrical equipment in mines, comprising a cable core and a tape layer (6), an inner sheath layer (7), a fiber braided reinforcement layer (8) and an outer sheath layer (9) sequentially coated on the outside of the cable core from the inside to the outside; The cable core comprises a tensile strength core 1 (1), a plurality of power insulation cores (2), at least one ground wire core (3), and at least one monitoring wire core (4), wherein the tensile strength core 1 (1) is arranged at the center of the cable core; Features: The monitoring wire core (4) is mainly composed of a second tensile strength core (41), a first copper wire conductor layer (43) braided and formed outside the second tensile strength core (41), and a monitoring insulation layer (44) extruded outside the first copper wire conductor layer (43).

2. The tensile power cable for mobile electric equipment in mines according to claim 1, characterized in that: The second tensile strength core (41) of the monitoring line core is a fiber rope structure; A second isolation layer (42) is provided between the second tensile strength core (41) of the monitoring wire core and the first copper wire conductor layer (43); The second isolation layer (42) is an extruded structure of EPDM insulation rubber outside the second tensile reinforcement core (41).

3. The tensile-resistant power cable for mobile electric equipment in mines according to claim 1 is characterized in that: The cable core also has at least one communication wire core (5).

4. The tensile-resistant power cable for mobile electric equipment in mines according to claim 3 is characterized in that: The communication line core (5) is mainly composed of a third tensile strength core (51), a second copper wire conductor layer (53) braided and formed outside the third tensile strength core (51), and a communication insulation layer (54) extruded outside the second copper wire conductor layer (53).

5. The tensile-resistant power cable for mobile electric equipment in mines according to claim 4 is characterized in that: The tensile strength core 3 (51) of the communication line core is a fiber rope structure; There is also an isolation layer 3 (52) between the tensile strength core 3 (51) and the copper wire conductor layer 2 (53) of the communication line core; The isolation layer three (52) is an extruded structure of EPDM insulation rubber outside the tensile reinforcement core three (51).

6. The tensile-resistant power cable for mobile electric equipment in mines according to claim 1, characterized in that: The tensile strength core 1 (1) in the cable core is a fiber rope structure; The tensile strength core (1) in the cable core has an isolation layer (11) formed by extrusion of a semi-conductive shielding rubber material.

7. The tensile-resistant power cable for mobile electric equipment in mines according to claim 1 is characterized in that: The power insulating wire core (2) mainly comprises a power conductor (21) of a copper wire twisted structure, a power insulating layer (22) extruded with ethylene propylene rubber on the outside of the power conductor (21), and a power shielding layer (23) wrapped with an aluminum-plastic composite tape on the outside of the power insulating layer (22).

8. The tensile-resistant power cable for mobile electric equipment in mines according to claim 1 is characterized in that: The ground wire core (3) mainly consists of a ground conductor (31) with a copper wire structure and a ground insulation layer (32) formed by extruding ethylene propylene rubber around the outside of the ground conductor (31).

9. The tensile-resistant power cable for mobile electric equipment in mines according to claim 1 or 3, characterized in that: The cable core is a twisted structure, and the twisted pitch-diameter ratio is 12 to 20 times.

10. The tensile-resistant power cable for mobile electric equipment in mines according to claim 1, characterized in that: The wrapping layer (6) is a structure in which at least one layer of non-woven fabric is wrapped around the outside of the cable core; The inner sheath layer (7) is an extruded structure of a polyurethane elastomer material outside the wrapping layer (6); The fiber braided reinforcement layer (8) is a braided structure of aramid fibers outside the inner sheath layer (7); The outer sheath layer (9) is an extruded structure of a polyurethane elastomer material outside the fiber braided reinforcement layer (8).

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