A mine cable provided with a buffer structure

Abstract

This invention belongs to the field of cable technology, specifically a mining cable with a buffer structure, comprising a sheathing assembly and a conductive assembly. The conductive assembly is enclosed within the sheathing assembly, serving as external protection and insulation for the conductive assembly, which conducts electricity. The sheathing assembly includes an insulation layer, core receiving holes, and arc-shaped wire holes. The core receiving holes are arranged in a circumferential array around the center of the insulation layer. Because the arc segment of the conductive assembly's core is arc-shaped, when the cable is subjected to tensile force, the straight sections of the core at both ends of the arc segment are stretched. The arc of the core gradually decreases, increasing the overall straight length of the conductive assembly, thereby buffering the tension on the cable and preventing damage due to stretching.

Description

Technical Field

[0001] This invention belongs to the field of cable technology, specifically a mining cable with a buffer structure. Background Technology

[0002] A cable is an insulated conductor consisting of one or more mutually insulated conductive cores placed in a sealed sheath. A protective covering layer may be added to the outside. It is used to transmit and distribute electrical energy or transmit electrical signals. Cables are characterized by being internally energized and externally insulated. There are many types of cables, and different cables are used in different fields.

[0003] A search revealed that Chinese patent application number 2021106601007 discloses a mining cable with pressure resistance. When the cable is compressed, the inner sheath and adjusting buffer block are deformed under external force, thus providing buffer protection for the cable core bundle. When the inner sheath and adjusting buffer block are deformed by compression, the buffer cavity can provide sufficient deformation space for the inner sheath and adjusting buffer block to improve the buffering effect of the inner sheath and adjusting buffer block on the cable core bundle. Although this cable provides a certain pressure resistance, underground cables often face external pulling. Due to the dim lighting in the underground environment, some underground equipment may trip the cable during manual movement, which can easily lead to cable damage. Summary of the Invention

[0004] The purpose of this invention is to provide a mining cable with a buffer structure to solve the problems mentioned in the background art.

[0005] This invention provides the following technical solution: a mining cable with a buffer structure, comprising:

[0006] The enclosure group and the conductive group are provided, wherein the conductive group is enclosed inside the enclosure group, the enclosure group is used for external protection and insulation of the conductive group, and the conductive group is used for conducting electricity;

[0007] The coating group includes:

[0008] Insulating layer;

[0009] The wire core receiving holes are arranged in a circular array around the center of the insulation layer inside the insulation layer;

[0010] An arc-shaped wire hole is formed between the left and right sections of the wire core receiving hole, and both ends of the arc-shaped wire hole are connected to the wire core receiving hole.

[0011] The conductive group includes:

[0012] A straight section of the wire core is fixedly installed inside a wire core receiving hole;

[0013] The wire core arc segment is fixedly installed inside the arc-shaped wire hole, and the wire core straight segment and the wire core arc segment are integrally connected.

[0014] As a preferred embodiment of the present invention, the coating group further includes:

[0015] An inner cavity is formed inside the insulation layer and located inside multiple wire core receiving holes. An elastic support is fixedly installed inside the inner cavity.

[0016] The annular cavity is formed inside the insulating layer, located on the periphery of the inner cavity, and inside the plurality of arc-shaped wire holes.

[0017] As a preferred embodiment of the present invention, the coating group further includes:

[0018] A pressurizing chamber is located on the left and right sides inside the inner cavity;

[0019] The pressure boosting hole is located on one side of the two pressure boosting chambers that are far apart from each other, and extends into the interior of the insulating layer;

[0020] A fan-shaped release groove is formed inside the insulation layer and located around multiple arc-shaped wire holes. The fan-shaped release groove is concentric with the inner cavity and has an arc-shaped cross-section.

[0021] A pressurization channel is provided between a pressurization hole and a fan-shaped release groove.

[0022] As a preferred embodiment of the present invention, there are multiple fan-shaped release slots, and the multiple fan-shaped release slots are distributed at equal intervals inside and outside. A conductive channel is provided between two adjacent fan-shaped release slots inside and outside, and the interiors of two adjacent fan-shaped release slots inside and outside are connected by the conductive channel.

[0023] As a preferred embodiment of the present invention, the inner wall of the inner cavity near the annular cavity is provided with a plurality of directional tear guide holes distributed at equal angles, and the interior of the directional tear guide holes is not connected to the interior of the annular cavity.

[0024] In a preferred embodiment of the present invention, the interior of the annular cavity is connected to the middle region of the interior of the arc-shaped wire hole.

[0025] As a preferred embodiment of the present invention, the elastic support includes an annular spring sheet, which is fixedly installed inside the inner cavity. The outer surface of the annular spring sheet is in contact with the inner surface of the inner cavity. A plurality of clearance openings are provided through the outer wall of the inner cavity, and the positions of the clearance openings correspond one-to-one with the positions of the directional tear guide holes.

[0026] As a preferred embodiment of the present invention, the number of the pressurization channels is multiple, and the multiple pressurization channels are distributed at equal angles about the center of the pressurization hole, and the multiple pressurization channels are all connected to the interior of the pressurization hole and the fan-shaped release groove.

[0027] As a preferred embodiment of the present invention, the interior of the ulceration cavity is filled with an appropriate amount of anaerobic filling liquid, and the interior of the ulceration cavity is set as a vacuum.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] 1. In this invention, because the conductor core arc segment is set in an arc shape, when the cable is subjected to tensile force, the straight sections of the conductor core at both ends of the arc segment are pulled, and the arc of the conductor core arc segment gradually decreases, making the overall straight length of the conductor group longer, thereby buffering the tension on the cable and preventing the cable from being damaged due to tension.

[0030] 2. When the present invention is subjected to a large tensile force, the arc segment of the wire core is gradually straightened. Based on the same principle, the arc-shaped wire hole squeezes the inner cavity inward and shrinks, increasing the pressure inside the inner cavity. When the pressure value reaches the set value, the pressure inside the inner cavity causes the anaerobic filling liquid inside to squeeze the directional tear guide hole. Under the strong pressure, the directional tear guide hole is torn, and the anaerobic filling liquid inside the inner cavity will be injected into the annular cavity through the directional tear guide hole. Then, it will be injected into the gap between the arc-shaped wire hole and the arc segment of the wire core through the annular cavity, and extend along the gap between the arc segment of the wire core and the arc-shaped wire hole until the anaerobic filling liquid enters the crack inside the insulation layer and fills the crack, thereby restoring the insulation layer to its insulation properties and preventing electric shock accidents.

[0031] 3. During the process of strong tension on the insulation layer of this invention, multiple fan-shaped release grooves are gradually straightened, and the space inside the fan-shaped release grooves is compressed. Since two adjacent fan-shaped release grooves are connected by a conductive channel, after the internal space of the fan-shaped release grooves is compressed, the air inside the fan-shaped release grooves is squeezed into the pressurization hole through the pressurization channel, and finally squeezed into the pressurization chamber through the pressurization hole. The air pressure inside the pressurization chamber increases, causing the pressurization chamber to expand and encroach on the internal space of the inner cavity, continuing to pressurize the inner cavity. This increases the pressure of the anaerobic filling liquid inside the inner cavity, allowing the anaerobic filling liquid to penetrate deeper into the cracks inside the insulation layer, thereby improving waterproofing and thus improving the insulation of the cable. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0033] Figure 2 This is a side cross-sectional view of the coating assembly of the present invention;

[0034] Figure 3For the present invention Figure 2 A partial structural diagram;

[0035] Figure 4 For the present invention Figure 3 A partial structural diagram;

[0036] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A;

[0037] Figure 6 This is a schematic diagram of the structure of the annular spring sheet of the present invention;

[0038] Figure 7 This is a schematic diagram of the end cross-sectional structure of the coating assembly of the present invention.

[0039] In the diagram: 100, sheathing group; 101, insulation layer; 102, core receiving hole; 103, arc-shaped wire hole; 104, inner cavity; 105, annular cavity; 106, pressure boosting cavity; 107, pressure boosting hole; 108, fan-shaped release groove; 109, pressure boosting channel; 1010, conductive channel; 1011, directional tear guide hole; 200, conductive group; 201, straight section of core; 202, arc section of core; 301, annular spring; 302, clearance opening. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Please see Figures 1 to 7 The technical solution provided by the present invention specifically includes the following embodiments:

[0042] A mining cable with a buffer structure includes a sheathing group 100 and a conductive group 200. The conductive group 200 is wrapped inside the sheathing group 100. The sheathing group 100 provides external protection and insulation for the conductive group 200, which conducts electricity. The sheathing group 100 includes an insulation layer 101, core receiving holes 102, and arc-shaped wire holes 103. The core receiving holes 102 are arranged in a circular array around the center of the insulation layer 101. The arc-shaped wire holes 103 are located between the left and right sections of the core receiving holes 102, and both ends of the arc-shaped wire holes 103 are connected to the core receiving holes 102. The conductive group 200... The conductive assembly 200 includes a straight section 201 and an arc section 202. The straight section 201 is fixedly installed inside the core receiving hole 102, and the arc section 202 is fixedly installed inside the arc-shaped wire hole 103. The straight section 201 and the arc section 202 are integrally connected. Since the arc section 202 of the conductive assembly 200 is arc-shaped, when the cable is subjected to tensile force, the straight section 201 at both ends of the arc section 202 will pull on it. The arc of the arc section 202 gradually decreases, making the overall straight length of the conductive assembly 200 longer, thereby buffering the tension on the cable and preventing the cable from being damaged due to tension.

[0043] For further details, please refer to [link / reference]. Figure 3 , Figure 5 As shown:

[0044] The coating assembly 100 also includes an inner cavity 104 and an annular cavity 105. The inner cavity 104 is opened inside the insulation layer 101 and is located inside the multiple wire core receiving holes 102. An elastic support is fixedly installed inside the inner cavity 104. The inner cavity 104 is filled with an appropriate amount of anaerobic filling liquid and is vacuum-sealed. The annular cavity 105 is opened inside the insulation layer 101 and is located outside the inner cavity 104. The annular cavity 105 is located inside the multiple arc-shaped wire holes 103.

[0045] Specifically, when the arc segment 202 of the wire core is stretched, its outer wall will press against the arc-shaped wire hole 103. Therefore, the arc-shaped wire hole 103 will deform towards the inner cavity 104, thereby compressing the internal space of the inner cavity 104. That is, the inner cavity 104 provides deformation space for the arc-shaped wire hole 103 to collapse inward, so that during the process of the arc-shaped part of the wire core arc segment 202 deforming towards the straightened state, it will not be greatly interfered by the arc-shaped wire hole 103. At the same time, the arc-shaped wire hole 103 collapses into the inner cavity 104. The deformation of the insulation layer 101 can also prevent the arc-shaped wire hole 103 from being torn due to excessive compressive force. Furthermore, because the elastic range of the insulation layer 101 is limited, when the cable is subjected to strong tensile force exceeding its withstand capacity, the deformation of the insulation layer 101 near the arc-shaped wire hole 103 is the greatest. Therefore, this part is easily torn, causing internal cracks. At this time, external liquids (such as water accumulated inside a mine) can easily penetrate through the cracks inside the insulation layer 101 and enter the arc-shaped wire hole 103, where they react with the wire. When the core arc segment 202 contacts, electrical conduction occurs, resulting in the loss of insulation effect of the insulation layer 101. This poses a risk of electric shock during cable use. Therefore, after the cable withstands significant tensile force, the core arc segment 202 gradually straightens. Following the same principle, the arc-shaped wire hole 103 compresses the inner cavity 104, causing it to collapse inward. The pressure inside the inner cavity 104 increases. When the pressure reaches a set value, the pressure inside the inner cavity 104 causes the anaerobic filling fluid inside to compress the directional tear guide hole 1011, strongly... Under pressure, the directional tear guide hole 1011 is torn, and the anaerobic filling liquid inside the inner cavity 104 will be injected into the annular cavity 105 through the directional tear guide hole 1011. Then, it will be injected into the gap between the arc-shaped wire hole 103 and the arc segment 202 of the wire core through the annular cavity 105, and extend along the gap between the arc segment 202 of the wire core and the arc-shaped wire hole 103 until the anaerobic filling liquid enters the crack inside the insulation layer 101, filling the crack and restoring the insulation layer 101 to its insulation properties to prevent electric shock accidents.

[0046] For further details, please refer to [link / reference]. Figure 4 , Figure 5 As shown:

[0047] The covering assembly 100 also includes a pressurizing chamber 106, a pressurizing hole 107, a fan-shaped release groove 108, and a pressurizing channel 109. The pressurizing chamber 106 is located on the left and right sides inside the inner cavity 104. The pressurizing hole 107 is located on the side of the two pressurizing chambers 106 that are far apart from each other and extends into the interior of the insulating layer 101. The fan-shaped release groove 108 is located inside the insulating layer 101 and is located around the periphery of multiple arc-shaped wire holes 103. The fan-shaped release groove 108 is concentric with the inner cavity 104 and has an arc-shaped cross-section. The pressurizing channel 109 is located between the pressurizing hole 107 and the fan-shaped release groove 108. There are multiple fan-shaped release grooves 108, and the multiple fan-shaped release grooves 108 are arranged inside and outside. The two adjacent fan-shaped release slots 108 are equidistantly distributed and each has a connecting channel 1010. The interiors of the two adjacent fan-shaped release slots 108 are connected through the connecting channel 1010. The inner wall of the inner cavity 104 near the annular cavity 105 has multiple directional tear guide holes 1011 distributed at equal angles. The interiors of the directional tear guide holes 1011 are not connected to the interiors of the annular cavity 105. The interiors of the annular cavity 105 are connected to the middle area of ​​the arc-shaped wire hole 103. There are multiple pressurization channels 109. The multiple pressurization channels 109 are distributed at equal angles about the center of the pressurization hole 107, and the multiple pressurization channels 109 are connected to the pressurization hole 107 and the interiors of the fan-shaped release slots 108.

[0048] Specifically, during the process of strong tension on the insulation layer 101, multiple sector-shaped release grooves 108 are gradually straightened, and the space inside the sector-shaped release grooves 108 is compressed. Since two adjacent sector-shaped release grooves 108 are connected by a conductive channel 1010, after the internal space of the sector-shaped release grooves 108 is compressed, the air inside the sector-shaped release grooves 108 is squeezed into the pressurization hole 107 through the pressurization channel 109, and finally squeezed into the pressurization chamber 106 through the pressurization hole 107. The air pressure inside the pressurization chamber 106 increases, causing the pressurization chamber 106 to expand and encroach on the internal space of the inner cavity 104, continuing to pressurize the inner cavity 104. This increases the pressure of the anaerobic filling liquid inside the inner cavity 104, allowing the anaerobic filling liquid to penetrate deeper into the cracks inside the insulation layer 101, thereby improving waterproofing and thus improving the insulation of the cable.

[0049] For further details, please refer to [link / reference]. Figure 6 As shown:

[0050] The elastic support includes an annular spring 301, which is fixedly installed inside the inner cavity 104. The outer surface of the annular spring 301 is in contact with the inner surface of the inner cavity 104. Multiple clearance openings 302 are provided through the outer wall of the inner cavity 104, and the positions of the clearance openings 302 correspond one-to-one with the positions of the directional tear guide holes 1011.

[0051] Specifically, during the process of the arc-shaped wire hole 103 compressing the inner cavity 104, the internal space of the inner cavity 104 is compressed, causing the annular spring 301 to undergo elastic deformation, thereby providing support for the inner wall of the inner cavity 104. At the same time, the rebound force of the annular spring 301 provides the potential energy for the inner cavity 104 to reset. Thus, after the tension on the cable disappears, the rebound force of the annular spring 301 causes the inner cavity 104 to be supported and restored to the outside by the compression. During the restoration process of the inner cavity 104, the arc-shaped wire hole 103 is pushed to the outside, so that the arc-shaped wire hole 103 returns to its initial arc shape, and the wire core arc segment 202 also returns to its initial arc shape. At the same time, the internal structure of the insulation layer 101 returns to its initial state under the action of its own rebound force, and the multiple fan-shaped release grooves 108 return to their initial arc shape.

[0052] When this invention is used, because the conductor core arc segment 202 of the conductive assembly 200 is arc-shaped, when the cable is subjected to tensile force, the straight sections 201 at both ends of the conductor core arc segment 202 are pulled, and the arc of the conductor core arc segment 202 gradually decreases, making the overall straight length of the conductive assembly 200 longer, thereby buffering the tension on the cable and preventing damage to the cable due to tension. When the conductor core arc segment 202 is pulled, its outer wall will press against the arc-shaped wire hole 103. Therefore, the arc-shaped wire hole 103 will deform towards the inner cavity 104, thereby compressing the internal space of the inner cavity 104. At the same time, the straight section 201 of the conductor core also undergoes tensile deformation. Since the insulation layer 101 has multiple fan-shaped release grooves 108 with arc-shaped cross-sections inside, after the insulation layer 101 is pulled, the arc of the arc-shaped fan-shaped release grooves 108 gradually decreases, which can release part of the arc. The stress inside the insulation layer 101 prevents it from tearing. During the process of the arc-shaped wire hole 103 squeezing the inner cavity 104, the space inside the inner cavity 104 is squeezed, causing the annular spring 301 to undergo elastic deformation, thereby providing support for the inner wall of the inner cavity 104. At the same time, the rebound force of the annular spring 301 provides the potential energy for the inner cavity 104 to reset. Thus, after the tension on the cable disappears, the rebound force of the annular spring 301 supports and restores the inner cavity 104 after squeezing and caving to the outside. During the restoration of the inner cavity 104, the arc-shaped wire hole 103 is pushed to the outside, so that the arc-shaped wire hole 103 returns to its initial arc shape, and the wire core arc segment 202 also returns to its initial arc shape. At the same time, the internal structure of the insulation layer 101 returns to its initial state under the action of its own rebound force, and the multiple fan-shaped release grooves 108 return to their initial arc shape.

[0053] Because the elastic range of the insulation layer 101 is limited, when the cable is subjected to strong tensile force that exceeds its bearing capacity, the deformation of the insulation layer 101 near the arc-shaped wire hole 103 is the greatest. Therefore, this part is easily torn, causing internal cracks. At this time, external liquids (such as water accumulated inside a mine) can easily penetrate through the cracks in the insulation layer 101 and enter the arc-shaped wire hole 103, coming into contact with the arc segment 202 of the wire core, thus causing electrical conduction. That is, the insulation effect of the insulation layer 101 is lost, and there is a risk of electric shock during cable use. Therefore, after the cable is subjected to a large tensile force, the arc segment 202 of the wire core is gradually straightened. Based on the same principle, the arc-shaped wire hole 103 squeezes the inner cavity 104 inward. As the pressure inside the inner cavity 104 increases, when the pressure reaches a set value, the pressure inside the inner cavity 104 causes the anaerobic filling liquid inside to squeeze the directional tear guide hole 1011. Under the strong pressure, the directional tear guide hole 1011 is torn, and the anaerobic filling liquid inside the inner cavity 104 will be injected into the annular cavity 105 through the directional tear guide hole 1011. Then, it will be injected into the gap between the arc-shaped wire hole 103 and the arc segment 202 of the wire core through the annular cavity 105, and extend along the gap between the arc segment 202 of the wire core and the arc-shaped wire hole 103 until the anaerobic filling liquid enters the crack inside the insulation layer 101 and fills the crack, thereby restoring the insulation layer 101 to its insulation properties and preventing electric shock accidents.

[0054] Simultaneously, during the intense stretching of the insulation layer 101, multiple sector-shaped release grooves 108 are gradually straightened, and the space inside the sector-shaped release grooves 108 is compressed. Since adjacent sector-shaped release grooves 108 are connected by a conductive channel 1010, after the internal space of the sector-shaped release grooves 108 is compressed, the air inside the sector-shaped release grooves 108 is squeezed into the pressurization hole 107 through the pressurization channel 109, and finally squeezed into the pressurization chamber 106 through the pressurization hole 107. The air pressure inside the pressurization chamber 106 increases, causing the pressurization chamber 106 to expand and encroach on the internal space of the inner cavity 104, continuing to pressurize the inner cavity 104. This increases the pressure of the anaerobic filling liquid inside the inner cavity 104, allowing the anaerobic filling liquid to penetrate deeper into the cracks inside the insulation layer 101, thereby improving waterproofing and thus improving the insulation of the cable.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A mining cable provided with a buffer structure, characterized in that: include: A covering group (100) and a conductive group (200), wherein the conductive group (200) is wrapped inside the covering group (100), the covering group (100) is used for the outer protection and insulation of the conductive group (200), and the conductive group (200) is used for conducting electricity; The coating group (100) includes: Insulation layer (101); The wire core receiving holes (102) are arranged in a circular array around the center of the insulation layer (101) and are located inside the insulation layer (101). An arc-shaped wire hole (103) is provided between two wire core receiving holes (102) on the left and right sides, and both ends of the arc-shaped wire hole (103) are connected to the wire core receiving hole (102). The conductive group (200) includes: A straight section (201) of the wire core is fixedly installed inside the wire core receiving hole (102); The wire core arc segment (202) is fixedly installed inside the arc-shaped wire hole (103), and the wire core straight segment (201) and the wire core arc segment (202) are integrally connected; The coating group (100) further includes: An inner cavity (104) is formed inside the insulation layer (101) and located inside the multiple wire core receiving holes (102). An elastic support member is fixedly provided inside the inner cavity (104). An annular cavity (105) is formed inside the insulating layer (101), the annular cavity (105) is located outside the inner cavity (104), and the annular cavity (105) is located inside the plurality of arc-shaped wire holes (103); The inner wall of the inner cavity (104) near the annular cavity (105) is provided with a plurality of directional tear guide holes (1011) distributed at equal angles. The interior of the directional tear guide holes (1011) is not connected to the interior of the annular cavity (105). The interior of the annular cavity (105) is connected to the middle region of the interior of the arc-shaped wire hole (103); The interior of the ulcer (104) is filled with an appropriate amount of anaerobic filling liquid, and the interior of the ulcer (104) is set as a vacuum.

2. A mining cable with a buffer structure according to claim 1, characterized in that: The coating group (100) further includes: The pressurization chamber (106) is located on the left and right sides inside the inner cavity (104); A pressure boosting hole (107) is provided on one side of the two pressure boosting chambers (106) that are far apart from each other, and extends into the interior of the insulating layer (101); A fan-shaped release groove (108) is formed inside the insulating layer (101) and located around a plurality of arc-shaped wire holes (103). The fan-shaped release groove (108) is concentric with the inner cavity (104). The cross section of the fan-shaped release groove (108) is arc-shaped. A pressurization channel (109) is provided between a pressurization hole (107) and a fan-shaped release groove (108).

3. A mining cable with a buffer structure according to claim 2, characterized in that: The number of the sector-shaped release slots (108) is multiple, and the multiple sector-shaped release slots (108) are distributed at equal intervals inside and outside. A conduction channel (1010) is provided between two adjacent sector-shaped release slots (108) inside and outside, and the inside of two adjacent sector-shaped release slots (108) inside and outside are connected through the conduction channel (1010).

4. A mining cable with a buffer structure according to claim 3, characterized in that: The elastic support includes an annular spring sheet (301), which is fixedly installed inside the inner cavity (104). The outer surface of the annular spring sheet (301) is in contact with the inner surface of the inner cavity (104). Multiple clearance openings (302) are provided through the outer wall of the inner cavity (104). The positions of the clearance openings (302) correspond one-to-one with the positions of the directional tear guide holes (1011).

5. A mining cable with a buffer structure according to claim 4, characterized in that: The number of the boosting channels (109) is multiple, and the multiple boosting channels (109) are distributed at equal angles about the center of the boosting hole (107), and the multiple boosting channels (109) are all connected to the interior of the boosting hole (107) and the fan-shaped release groove (108).

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