Cold-resistant and pressure-resistant cable

Abstract

The invention discloses a cold-resistant and compression-resistant cable, and belongs to the technical field of cables, the cable comprises a sheath and a plurality of cable cores, the plurality of cable cores are arranged in the sheath side by side in a line, and the cable also comprises a compression-resistant mechanism; the anti-compression mechanism comprises a buffer mechanism, a reverse confrontation mechanism and an air cylinder, the buffer mechanism is located between the sheath and the cable cores, the air cylinder is located between the adjacent cable cores, and the reverse confrontation mechanism is connected with the air cylinder and used for extruding the buffer mechanism towards the two sides in the height direction of the cable; and a thermal insulation filler is filled between the sheath and the cable core. The problem that an existing cable is poor in pressure resistance and cold resistance is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and more particularly to a cold-resistant and pressure-resistant cable. Background Art

[0002] Cable is a device for transmitting electric energy or signals. It usually consists of several or several groups of wires and has the characteristics of internal power supply and external insulation. Cables can be used to transmit electric (magnetic) energy and information and realize electromagnetic energy conversion. They are widely used in urban underground power grids, power station lead-out lines, internal power supply of industrial and mining enterprises, and underwater transmission lines across rivers and seas. There are many types of cables, including power cables, control cables, compensation cables, shielded cables, high-temperature cables, etc. They are composed of single or multiple wires and insulation layers, and are used to connect circuits and electrical appliances.

[0003] During the transportation, laying and use of cables, they are often squeezed and collided by external forces. The existing cables have simple structures and poor compression resistance, and the cable core is easily damaged, resulting in deformation. In addition, the existing cables have poor cold resistance and are easily brittle when used in cold areas, which affects the service life of the cables.

[0004] In view of this, the present invention provides a novel cold-resistant and pressure-resistant cable. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a cold-resistant and pressure-resistant cable, which solves the problem that the existing cables have poor pressure resistance and cold resistance.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A cold-resistant and pressure-resistant cable comprises a sheath and a plurality of cable cores, wherein the plurality of cable cores are arranged in a row in the sheath, and also comprises a pressure-resistant mechanism;

[0008] The anti-pressure mechanism includes a buffer mechanism, a reverse antagonism mechanism and an air cylinder, wherein the buffer mechanism is located between the sheath and the cable core, the air cylinder is located between adjacent cable cores, and the reverse antagonism mechanism is connected to the air cylinder and is used to squeeze the buffer mechanism toward both sides along the cable height direction;

[0009] A heat-insulating filler is filled between the sheath and the cable core.

[0010] It is further preferred that: the buffer mechanism comprises a pressure plate, a push rod, a spring and a piston;

[0011] The pressing plate is located on both sides of the cable core along the height direction of the cable, one end of the push rod is fixed on the pressing plate, and the other end is inserted into the gas cylinder and fixed to the piston, and the piston is located in the gas cylinder and pressed against the inner wall of the gas cylinder;

[0012] The spring is sleeved on the outer surface of the push rod, one end of the spring is fixed to the pressure plate, and the other end is fixed to the end of the gas cylinder, and the gas cylinder is provided with an air inlet and an air outlet.

[0013] It is further preferred that: the reverse countermeasure mechanism comprises an air bag and a connecting tube;

[0014] One end of the connecting tube is connected to the air inlet and outlet, and the other end is connected to the air bag, and the air bag is located between the pressing plate and the cable core.

[0015] Further preferably, an inner armor layer is provided on the outer surface of the cable core, the inner armor layer is used to wrap around one or more outer surfaces of the cable cores, and the airbag is provided on the outer surface of the inner armor layer.

[0016] Further preferably, the cross section of the airbag is "U"-shaped and the opening is close to the air cylinder, and the airbag is fixed to the outer surface of the inner armor layer.

[0017] Further preferably, the reverse antagonism mechanism is symmetrically arranged at opposite sides of the air cylinder along the cable width direction, the buffer mechanism is symmetrically arranged at both ends of the air cylinder along the cable height direction, and the air inlet and outlet are located in the middle of the air cylinder.

[0018] Further preferably, a fixing sheet is fixed to the pressing plate at the side away from the cable core, and the fixing sheet is adhered to the inner wall of the sheath.

[0019] Further preferably, the cable core comprises a copper conductor, a shielding layer, an inner insulating layer and a thermal insulation sleeve, wherein the shielding layer, the inner insulating layer and the thermal insulation sleeve are sequentially coated on the outer surface of the copper conductor from the inside to the outside, and the thermal insulation sleeve is made of a polyurethane thermal insulation material.

[0020] Further preferably, an outer insulating layer and an outer armor layer are provided on the inner wall of the sheath, and the outer insulating layer is located between the sheath and the outer armor layer.

[0021] It is further preferred that the thermal insulation filler is a chrysotile fiber material.

[0022] In summary, the present invention has the following beneficial effects:

[0023] When the cable is subjected to external forces such as trampling, rolling, and squeezing, the two pressure plates in the height direction of the cable drive the pistons to approach each other. At this time, the spring can offset a certain amount of pressure and play a role in buffering and shock absorption. When the two pistons approach each other, the air in the cylinder will be continuously pressed into the airbag through the connecting pipe, causing the airbag to gradually expand, thereby pushing the two pressure plates in the opposite direction to offset all pressure through the airbag to prevent external forces from acting on the cable core. Under the dual action of the spring and the airbag, it can better resist external forces, and with the outer armor layer and the inner armor layer, it can effectively protect the cable core, improve the compressive strength of the cable, and extend its service life.

[0024] The provision of the insulation sleeve and insulation filler can effectively protect the copper conductor, so that the cable can be used normally in cold areas, thereby increasing the service life of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a cross-sectional schematic diagram in the embodiment, which is mainly used to illustrate the internal structure of the cable;

[0026] Figure 2 It is a cross-sectional schematic diagram in the embodiment, which is mainly used to illustrate the structure of the buffer mechanism and the air cylinder;

[0027] Figure 3 It is a partial cross-sectional schematic diagram in the embodiment, which is mainly used to illustrate the installation structure of adjacent pressure-resistant mechanisms.

[0028] In the figure, 1, sheath; 2, outer insulating layer; 3, outer armor layer; 4, thermal insulation filler; 5, inner armor layer; 61, buffer mechanism; 611, pressure plate; 612, fixing plate; 613, push rod; 614, spring; 615, piston; 621, air bag; 622, connecting pipe; 63, air cylinder; 64, air inlet and outlet; 71, copper conductor; 72, shielding layer; 73, inner insulation layer; 74, thermal insulation sleeve. DETAILED DESCRIPTION

[0029] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] Embodiment: A cold-resistant and pressure-resistant cable, such as Figure 1-3 As shown, it includes a sheath 1, a compression-resistant mechanism and a plurality of cable cores. The plurality of cable cores are arranged side by side in a line in the sheath 1 so that the cable as a whole presents a flat structure. An inner armor layer 5 is provided on the outer surface of the cable core, and the inner armor layer 5 is used to wrap around the outer surface of one or more cable cores. Preferably, in this embodiment, there are four cable cores in total and they are wrapped in the inner armor layer 5 in groups of two, and each group is filled with a thermal insulation filler 4 between the inner wall of the inner armor layer 5 and the outer wall of the cable core. Similarly, the thermal insulation filler 4 is filled between the sheath 1 and the cable core, and the thermal insulation filler 4 is a chrysotile fiber material. The chrysotile fiber material has a certain thermal insulation and temperature locking effect, and filling it in the sheath 1 can improve the cold resistance of the cable.

[0031] Preferably, the cable core includes a copper conductor 71, a shielding layer 72, an inner insulating layer 73 and an insulating sleeve 74. The shielding layer 72, the inner insulating layer 73 and the insulating sleeve 74 are sequentially coated on the outer surface of the copper conductor 71 from the inside to the outside, and the insulating sleeve 74 is made of a polyurethane insulating material. The provision of the insulating sleeve 74 can effectively protect the copper conductor 71, so that the cable can be used normally in cold areas, thereby increasing the service life of the cable. The inner wall of the sheath 1 is provided with an outer insulating layer 2 and an outer armor layer 3, and the outer insulating layer 2 is located between the sheath 1 and the outer armor layer 3. The provision of the inner armor layer 5 and the outer armor layer 3 can protect the cable and enhance the mechanical strength and anti-interference performance of the cable, such as tensile strength and compressive strength. Preferably, the inner armor layer 5 and the outer armor layer 3 are both steel belt armor layers.

[0032] Reference Figure 1-3 The anti-pressure mechanism includes a buffer mechanism 61, a reverse antagonism mechanism and an air cylinder 63. The air cylinder 63 is located between adjacent cable cores. Specifically, the air cylinder 63 is located at the center of the cable cross section and between two groups of cable cores. The buffer mechanism 61 is located between the sheath 1 and the cable core and at both ends of the air cylinder 63. The length direction of the air cylinder 63 is consistent with the height direction of the cable. The reverse antagonism mechanism is connected to the air cylinder 63 and is used to squeeze the buffer mechanism 61 to both sides along the height direction of the cable. There are multiple anti-pressure mechanisms arranged at equal intervals along the length direction of the cable. The multiple anti-pressure mechanisms are close to each other. When the cable needs to be cut, the cutting operation can be performed between adjacent anti-pressure mechanisms. More than two air cylinders 63 can be set between the upper and lower pressure plates 611 for connection, depending on the length of the pressure plate 611.

[0033] Preferably, the buffer mechanism 61 includes a pressing plate 611, a push rod 613, a spring 614 and a piston 615. The pressing plate 611 is located on both sides of the cable core along the height direction of the cable. The side of the pressing plate 611 away from the cable core is an arc surface with the middle gradually protruding outward. A fixing plate 612 is fixed in the middle of the arc surface. The fixing plate 612 is attached to the outer armor layer 3 of the inner wall of the jacket 1. The fixing plate 612 is located at both ends of the gas cylinder 63. One end of the push rod 613 is fixed to the pressing plate 611, and the other end is inserted into the gas cylinder 63 and fixed to the piston 615. The piston 615 is located in the gas cylinder 63 and is tightly pressed against the inner wall of the gas cylinder 63. The spring 614 is sleeved on the outer surface of the push rod 613. One end of the spring 614 is fixed to the pressing plate 611, and the other end is fixed to the end of the gas cylinder 63. The gas cylinder 63 is provided with an air inlet and outlet 64. In order to achieve good pressure resistance, the buffer mechanism 61 is symmetrically arranged at both ends of the air cylinder 63 along the height direction of the cable, and the air inlet and outlet 64 are located in the middle of the length direction of the air cylinder 63. The flat cable is generally subjected to external forces such as trampling, rolling, and squeezing in the height direction. The buffer mechanism 61 is arranged on both sides of the cable width direction to effectively protect the internal structure of the cable and play a role in buffering and shock absorption.

[0034] Preferably, the reverse antagonism mechanism includes an airbag 621 and a connecting tube 622. One end of the connecting tube 622 is connected to the air inlet and outlet 64, and the other end is connected to the airbag 621. The airbag 621 is located between the pressure plate 611 and the cable core. Specifically, the airbag 621 is wrapped on the outer surface of the inner armor layer 5 of the two groups of cable cores. The cross section of the airbag 621 is "U"-shaped and the opening is close to the air cylinder 63. The airbag 621 is fixed to the outer surface of the inner armor layer 5. The reverse antagonism mechanism is symmetrically arranged on opposite sides of the air cylinder 63 along the width direction of the cable. The arc surface of the pressure plate 611 is close to the outer armor layer 3, and the other side is located outside the airbag 621.

[0035] In the present invention, when the cable is subjected to external forces such as trampling, rolling, and squeezing, the two pressure plates 611 in the height direction of the cable drive the piston 615 to approach each other. At this time, the spring 614 can offset a certain pressure and play a role of buffering and shock absorption. When the two pistons 615 approach each other, the air in the cylinder 63 will be continuously pressed into the airbag 621 through the connecting pipe 622, so that the airbag 621 gradually expands, thereby pushing the two pressure plates 611 in the opposite direction to offset all pressure through the airbag 621 to prevent external forces from acting on the cable core. Under the dual action of the spring 614 and the airbag 621, it can better resist external forces, cooperate with the outer armor layer 3 and the inner armor layer 5, and effectively protect the cable core, improve the compressive strength of the cable, and extend the service life. After the external force is released, under the reset action of the spring 614 and the airbag 621, the two pressure plates 611 are reset, and the gas pressed into the airbag 621 returns to the cylinder 63 again. In addition, the airbag 621 is wrapped around the outer surface of the cable core, so that the cable can be protected by the airbag 621 even if it is squeezed in the width direction.

[0036] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A cold-resistant and pressure-resistant cable, comprising a sheath (1) and a plurality of cable cores, wherein the plurality of cable cores are arranged in a row in the sheath (1), characterized in that: It also includes stress-resistant mechanisms; The anti-pressure mechanism comprises a buffer mechanism (61), a reverse antagonistic mechanism and an air cylinder (63); the buffer mechanism (61) is located between the sheath (1) and the cable core; the air cylinder (63) is located between adjacent cable cores; the reverse antagonistic mechanism is connected to the air cylinder (63) and is used to squeeze the buffer mechanism (61) toward both sides along the cable height direction; A heat-insulating filler (4) is filled between the sheath (1) and the cable core.

2. A cold-resistant and pressure-resistant cable according to claim 1, characterized in that: The buffer mechanism (61) comprises a pressure plate (611), a push rod (613), a spring (614) and a piston (615); The pressing plate (611) is located on both sides of the cable core along the height direction of the cable, one end of the push rod (613) is fixed on the pressing plate (611), and the other end is inserted into the gas cylinder (63) and fixed to the piston (615), and the piston (615) is located in the gas cylinder (63) and is tightly pressed against the inner wall of the gas cylinder (63); The spring (614) is sleeved on the outer surface of the push rod (613), one end of the spring (614) is fixed to the pressure plate (611), and the other end is fixed to the end of the air cylinder (63), and the air cylinder (63) is provided with an air inlet and outlet (64).

3. A cold-resistant and pressure-resistant cable according to claim 2, characterized in that: The reverse countermeasure mechanism comprises an air bag (621) and a connecting pipe (622); One end of the connecting tube (622) is connected to the air inlet and outlet (64), and the other end is connected to the air bag (621), and the air bag (621) is located between the pressing plate (611) and the cable core.

4. The cold-resistant and pressure-resistant cable according to claim 3, characterized in that: The outer surface of the cable core is provided with an inner armor layer (5), and the inner armor layer (5) is used to wrap around one or more outer surfaces of the cable core, and the airbag (621) is arranged on the outer surface of the inner armor layer (5).

5. The cold-resistant and pressure-resistant cable according to claim 4, characterized in that: The cross section of the airbag (621) is "U"-shaped and its opening is close to the air cylinder (63). The airbag (621) is fixed to the outer surface of the inner armor layer (5).

6. The cold-resistant and pressure-resistant cable according to claim 3, characterized in that: The reverse countermeasure mechanism is symmetrically arranged at opposite sides of the air cylinder (63) along the cable width direction, the buffer mechanism (61) is symmetrically arranged at both ends of the air cylinder (63) along the cable height direction, and the air inlet and outlet (64) is located in the middle of the air cylinder (63).

7. The cold-resistant and pressure-resistant cable according to claim 2, characterized in that: A fixing sheet (612) is fixed to the pressure plate (611) at the side away from the cable core, and the fixing sheet (612) is bonded to the inner wall of the sheath (1).

8. The cold-resistant and pressure-resistant cable according to claim 1, characterized in that: The cable core comprises a copper conductor (71), a shielding layer (72), an inner insulating layer (73) and a thermal insulation sleeve (74); the shielding layer (72), the inner insulating layer (73) and the thermal insulation sleeve (74) are sequentially coated on the outer surface of the copper conductor (71) from the inside to the outside; and the thermal insulation sleeve (74) is made of a polyurethane thermal insulation material.

9. The cold-resistant and pressure-resistant cable according to claim 1, characterized in that: An outer insulating layer (2) and an outer armor layer (3) are provided on the inner wall of the sheath (1), and the outer insulating layer (2) is located between the sheath (1) and the outer armor layer (3).

10. The cold-resistant and pressure-resistant cable according to claim 1, characterized in that: The thermal insulation filler (4) is chrysotile fiber material.

Images