A DC photovoltaic cable with a large overhead span

Abstract

The present invention discloses a DC photovoltaic cable with a large overhead span, including a supporting cable. One end of the supporting cable is provided with a replacement cable. Both the supporting cable and the replacement cable are composed of an external insulating protective sheath and an internal lining. A hot-melt extrusion disc is clamped between the replacement cable and the supporting cable. The hot-melt extrusion disc is electrically connected to an external power source. The hot-melt extrusion disc is composed of two semi-circular rings, and the two semi-circular rings are spliced together to form a complete circle. An installation bracket is arranged outside the hot-melt extrusion disc. One side of the installation bracket is fixedly welded with a guiding slide rod, and the installation bracket and the guiding slide rod are slidably sleeved with each other. The two sides of the installation bracket are correspondingly movably connected with telescopic connecting arms through hinges. One side of the telescopic connecting arm is movably connected with an arc-shaped attaching disc through a hinge. One end of the replacement cable is provided with a waste material removing device through clamping. This device solves the problem of poor current practicability.

Description

Technical Field

[0001] The present invention belongs to the technical field of photovoltaic cables, and particularly relates to a DC photovoltaic cable with a large overhead span. Background Art

[0002] A photovoltaic cable is a cable for transmitting electric energy. Some cables are equipped with an inner lining for auxiliary signal transmission. In the case of ultra-long-distance use with a large span, due to the different thermal expansion and contraction properties of the cable sheath and the internal steel, there is a situation where the length of the sheath at the connection end is greater than or less than that of the internal steel. When it is less, the length of the sheath is usually forced to be consistent with the inner lining by pulling, but this will damage the life of the cable sheath, making it more likely to crack during long-term use, resulting in a large equipment transformation cost and poor practicability. This phenomenon has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0003] The purpose of the present invention is to provide a DC photovoltaic cable with a large overhead span for the existing logging equipment to solve the problems raised in the above background art.

[0004] To solve the above technical problems, the present invention provides the following technical solution: A DC photovoltaic cable with a large overhead span includes a supporting cable, and a replacement cable is arranged at one end of the supporting cable. Both the supporting cable and the replacement cable are composed of an external insulating protective sheath and an internal lining. A hot melt extrusion disc is clamped between the replacement cable and the supporting cable, and the hot melt extrusion disc is electrically connected to an external power source.

[0005] The present invention further explains that the hot melt extrusion disc is composed of two semi-circular rings, and the two semi-circular rings are spliced into a complete circle. An installation bracket is arranged outside the hot melt extrusion disc. One side of the installation bracket is fixedly connected by welding with a guiding slide rod, and the installation bracket and the guiding slide rod are slidably sleeved with each other. Telescopic connecting arms are correspondingly and movably connected to both sides of the installation bracket through hinges.

[0006] The present invention further explains that one side of the telescopic connecting arm is movably connected by a hinge with an arc-shaped attaching disc, and the two arc-shaped attaching discs are respectively clamped with the replacement cable and the supporting cable.

[0007] The present invention further explains that the arc-shaped attaching disc is made of a magnetic material, and the two arc-shaped attaching discs are magnetically attracted to each other.

[0008] The present invention further explains that hot melt wires one and two are correspondingly installed on both sides of the hot melt extrusion disc. The hot melt wire one and the insulating protective sheath are located within the same circumference, and the hot melt wire two and the lining are located within the same circumference.

[0009] The present invention is further described as follows. One end of the replacement cable is provided with a waste material removing device through clamping connection. Inside the waste material removing device, a transmitting disc is rotatably connected through a bearing. The inner wall of the waste material removing device is fixedly welded with a second motor. The output end of the second motor is movably connected with a gear through a coupling. The gear meshes with the transmitting disc. One side of the transmitting disc is provided with a transmitting head. A plurality of clamping grooves are evenly formed on one side of the transmitting head. A plurality of clamping blocks are evenly arranged on one side of the transmitting disc. The clamping grooves and the clamping blocks are in clamping fit with each other. A plurality of waste material collecting hoppers are evenly installed on the outer wall of the transmitting head. The waste material collecting hoppers are in contact with the inner wall of the lining.

[0010] The present invention is further described as follows. An injection cylinder is installed on the inner wall of the waste material removing device. The output end of the injection cylinder is fixedly welded with a ventilation pipe. A plurality of through holes are evenly formed on the transmitting disc. The ventilation pipe is in communication with the through holes.

[0011] The present invention is further described as follows. One end of the transmitting head is connected with a pulling rope. A first motor is installed at the rear end of the waste material removing device. The output end of the first motor is connected with a rope reel. The pulling rope is wound around the outer part of the rope reel.

[0012] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: In the present invention, one end of the short matching cable is connected to the replacement cable by means of hot melt connection, so that the cable sheath can reach a suitable length without forced pulling, and the waste materials of the melted synthetic plastic can be removed, making the inside of the cable sheath smooth and flat, and preventing damage to the internal cables. Description of the Drawings

[0013] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0014] Figure 1 is the overall structural schematic diagram of the present invention;

[0015] Figure 2 is the schematic diagram of the waste material removing process of the present invention;

[0016] Figure 3 is the structural schematic diagram of the waste material removing device of the present invention;

[0017] Figure 4 is the structural schematic diagram of the hot melt extrusion disc of the present invention;

[0018] In the figure: 1. Substitute cable; 2. Supporting cable; 3. Hot melt extrusion disc; 31. First hot melt wire; 32. Second hot melt wire; 4. Installation bracket; 41. Guide slide bar; 42. Telescopic connecting arm; 43. Arc attachment disc; 51. Insulating protection sheath; 52. Inner lining; 6. Scrap removal device; 61. Emiting disc; 611. Clamping block; 62. Emiting head; 621. Card slot; 63. Scrap collection hopper; 64. First motor; 641. Rope disc; 65. Second motor; 651. Gear; 66. Injection cylinder; 661. Vent pipe; 67. Pull-back rope. Detailed implementation mode

[0019] The technical solution of the present invention will be further described in detail below in conjunction with the preferred embodiments and their accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1-4 , the present invention provides a technical solution: a DC photovoltaic cable with a large overhead span, including a supporting cable 2. One end of the supporting cable 2 is provided with a substitute cable 1. Both the supporting cable 2 and the substitute cable 1 are composed of an external insulating protection sheath 51 and an internal inner lining 52. A hot melt extrusion disc 3 is clamped between the substitute cable 1 and the supporting cable 2. The hot melt extrusion disc 3 is electrically connected to an external power supply. By hot melt connecting one end of the substitute cable 1 and the supporting cable 2, the supporting cable 2 can be extended to a suitable length, and it can be connected without modifying the structure of the wiring terminal, which is practical and convenient;

[0021] The hot melt extrusion disc 3 is composed of two semi-circular rings, and the two semi-circular rings are spliced together to form a complete circle. An installation bracket 4 is arranged outside the hot melt extrusion disc 3. One side of the installation bracket 4 is fixedly welded with a guide slide bar 41. The installation bracket 4 and the guide slide bar 41 are slidably sleeved with each other. The two sides of the installation bracket 4 are correspondingly connected with telescopic connecting arms 42 through hinges. When hot melting, the two semi-circular rings are spliced. At this time, the end of the protective inner lining can be heated and melted, and the two ends can be melted into one body after melting. When the hot melting is completed, the two semi-circular parts are unfolded and slide parallel on the guide slide bar 41 until they do not intersect with the hot melt extrusion disc 3. At this time, it is convenient to unfold it, and at this time, the two ends of the supporting cable 2 and the substitute cable 1 can be directly connected together, and the operation is convenient;

[0022] One side of the telescopic connecting arm 42 is movably connected with an arc-shaped attaching disc 43 through a hinge. The two arc-shaped attaching discs 43 are respectively clamped with the replacement cable 1 and the matching cable 2. When connecting the matching cable 2 and the replacement cable 1 to each other, first reduce the included angle between the two telescopic connecting arms 42, and the distance between the two arc-shaped attaching discs 43 is close, so that the two can be easily connected together, which is convenient for guiding the connection to prevent deviation;

[0023] The arc-shaped attaching disc 43 is made of magnetic material, and the two arc-shaped attaching discs 43 are magnetically attracted to each other. When the two arc-shaped attaching discs 43 are in contact with each other, they can be magnetically attracted to each other due to the magnetic force. At this time, the two replacement cables 1 and the matching cable 2 can be closely attached together for cooling. When the hot melting is over, manually separate the two arc-shaped attaching discs 43;

[0024] On both sides of the hot-melt extrusion disc 3, a first hot-melt wire 31 and a second hot-melt wire 32 are correspondingly installed. The first hot-melt wire 31 and the insulating protective sheath 51 are located in the same circumference, and the second hot-melt wire 32 and the inner lining 52 are located in the same circumference. By passing different currents through the first hot-melt wire 31 and the second hot-melt wire 32, their heating temperatures can be made different. Among them, the heating temperature of the first hot-melt wire 31 is equal to the temperature of the plastic sheath, and the heating temperature of the second hot-melt wire 32 is equal to the heating temperature of the inner lining, so that the ends of both can be controlled at a suitable temperature for melting, improving the sealing performance when the insulating protective sheath 51 is sealed;

[0025] One end of the replacement cable 1 is provided with a waste material removing device 6 through clamping. Inside the waste material removing device 6, a transmitting disc 61 is rotatably connected through a bearing. The inner wall of the waste material removing device 6 is fixedly welded with a second motor 65. The output end of the second motor 65 is movably connected with a gear 651 through a coupling. The gear 651 meshes with the transmitting disc 61. One side of the transmitting disc 61 is provided with a transmitting head 62. On one side of the transmitting head 62, clamping grooves 621 are evenly opened. On one side of the transmitting disc 61, clamping blocks 611 are evenly arranged. The clamping grooves 621 and the clamping blocks 611 are clamped and matched with each other. On the outer wall of the transmitting head 62, waste material collecting hoppers 63 are evenly installed. The waste material collecting hoppers 63 are in contact with the inner wall of the inner lining 52. When the synthetic plastic cools and solidifies, start the second motor 65 to drive the transmitting disc 61 to rotate. At this time, when the clamping block 611 is inserted into the clamping groove 621, the transmitting disc 61 drives the transmitting head 62 to rotate, giving the transmitting head 62 an initial rotational speed. When the transmitting head 62 is separated from the transmitting disc 61, the transmitting head 62 can keep rotating all the time, which is convenient for driving the waste material collecting hoppers 63 to rotate through the circumferential rotation of the transmitting head 62. At this time, the inner wall of the protective inner lining can be fully scraped by the waste material collecting hoppers 63 to make its inner wall smooth without edges or protrusions, and the inner cable sheath will not be damaged due to friction, and the granular waste material scraped off will be collected;

[0026] An injection cylinder 55 is installed on the inner wall of the scrap removing device 6. The output end of the injection cylinder 55 is fixedly welded with a ventilation pipe 661. Through holes are evenly formed in the emission disc 61, and the ventilation pipe 661 communicates with the through holes. When it is necessary to recycle the scraps, at this time, the synthetic plastic should also be re-cooled into a solid state. The injection cylinder 55 is started to generate gas. The gas enters the ventilation pipe 661 and is ejected from the inside. When the emission disc 61 rotates to a certain angle, the through holes are conducted, and at this time, the emission head 62 is ejected to scrape the inner wall of the protective lining, providing sufficient power to remove the molten excess scraps.

[0027] One end of the emission head 62 is connected with a pulling rope 67. A first motor 64 is installed at the rear end of the scrap removing device 6. The output end of the first motor 64 is connected with a rope reel 641. The pulling rope 67 is wound around the outside of the rope reel 641. By starting the first motor 64, the rope reel 641 can be driven to rotate. At this time, the pulling rope 67 can be driven to wind around the outside of the rope reel 641, pulling the emission head 62 back to its original position. It can be repeatedly ejected and pulled, making the inner surface of the protective lining smooth and flat, no different from a normal protective lining.

[0028] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0029] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A DC photovoltaic cable with a large overhead span, comprising a supporting cable (2), characterized in that: One end of the supporting cable (2) is provided with a replacement cable (1). Both the supporting cable (2) and the replacement cable (1) are composed of an external insulating protective sheath (51) and an internal lining (52). A hot melt extrusion disc (3) is clamped between the replacement cable (1) and the supporting cable (2), and the hot melt extrusion disc (3) is electrically connected to an external power supply; One end of the replacement cable (1) is provided with a waste material removing device (6) through clamping. A launching disc (61) is rotatably connected to the inside of the waste material removing device (6) through a bearing. A second motor (65) is fixedly welded to the inner wall of the waste material removing device (6). The output end of the second motor (65) is movably connected with a gear (651) through a coupling. The gear (651) meshes with the launching disc (61). A launching head (62) is arranged on one side of the launching disc (61). A plurality of clamping grooves (621) are evenly formed on one side of the launching head (62). A plurality of clamping blocks (611) are evenly arranged on one side of the launching disc (61). The clamping grooves (621) and the clamping blocks (611) are clamped and matched with each other. A plurality of waste material collecting hoppers (63) are evenly installed on the outer wall of the launching head (62). The waste material collecting hoppers (63) are in contact with the inner wall of the lining (52); The hot melt extrusion disc (3) is composed of two semi-circular rings, and the two semi-circular rings are spliced into a complete circle. An installation bracket (4) is arranged outside the hot melt extrusion disc (3). A guiding sliding rod (41) is fixedly welded to one side of the installation bracket (4). The installation bracket (4) is slidably sleeved with the guiding sliding rod (41). Two telescopic connecting arms (42) are movably connected to the two sides of the installation bracket (4) through hinges respectively; A first hot melt wire (31) and a second hot melt wire (32) are respectively installed on the two sides of the hot melt extrusion disc (3). The first hot melt wire (31) and the insulating protective sheath (51) are located in the same circumference. The second hot melt wire (32) and the lining (52) are located in the same circumference.

2. The DC photovoltaic cable with a large overhead span according to claim 1, wherein: One side of the telescopic connecting arm (42) is movably connected with an arc-shaped attaching disc (43) through a hinge. The two arc-shaped attaching discs (43) are respectively clamped with the replacement cable (1) and the supporting cable (2).

3. The DC photovoltaic cable with a large overhead span according to claim 2, characterized in that: The arc-shaped attaching disc (43) is made of a magnetic material, and the two arc-shaped attaching discs (43) are magnetically attracted to each other.

4. A DC photovoltaic cable with a large overhead span according to claim 1, characterized in that: A spraying cylinder (55) is installed on the inner wall of the waste material removing device (6). The output end of the spraying cylinder (55) is fixedly welded with a ventilation pipe (661). A plurality of through holes are evenly formed on the launching disc (61). The ventilation pipe (661) is communicated with the through holes.

5. A DC photovoltaic cable with a large overhead span according to claim 1, characterized in that: One end of the launching head (62) is connected with a pulling rope (67). A first motor (64) is installed at the rear end of the waste material removing device (6). The output end of the first motor (64) is connected with a rope disc (641). The pulling rope (67) is wound around the outside of the rope disc (641).

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