Simple device for paying off photovoltaic direct-current cable

Abstract

The utility model discloses a simple device for paying off a photovoltaic direct current cable, which comprises a cable reel wound with a cable, the end face of the cable reel is upward, a paying off assembly is inserted into a shaft hole and comprises a vertical rod piece, a horizontal rod piece and a circular ring, the vertical rod piece is inserted into the shaft hole in the middle of the cable reel and naturally inclines, and the circular ring is arranged on the horizontal rod piece. One end of the horizontal rod piece is connected with the exposed upper end of the vertical rod piece, the other end of the horizontal rod piece is connected with the circular ring, and an opening of the circular ring is vertically downward; the simple device for paying off the photovoltaic direct-current cable further comprises a fixed pulley used for changing the direction of the cable, and the fixed pulley is connected with the ceiling and arranged over the cable reel shaft hole. The cable pay-off device has the advantages that a cable penetrates through the circular ring of the pay-off assembly and drives the pay-off assembly to rotate ceaselessly in the process of paying off from a cable reel, winding is prevented, and the cable pay-off device is simple in structure, convenient to manufacture and carry, small in limitation and suitable for being used in various environments; and the cable direction is changed by arranging the fixed pulley, so that cable laying work is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a simple device for laying out photovoltaic DC cables. Background Art

[0002] The DC cables for industrial and commercial photovoltaic projects have a wire diameter between 2.5mm and 10mm. They are usually wound on cable drums for transportation and then released from the cable drums when in use. The traditional method is to manually release the cables, with a dedicated person operating the cables near the cable drum, which wastes manpower and has low work efficiency. There are currently dedicated cable release equipment on the market, but the equipment is relatively bulky, complex in structure, not easy to carry, and has many restrictions, which makes it impossible to market. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the existing cable pay-off device is bulky as a whole, inconvenient to carry, and has a complex structure and cannot be commercialized; in view of the above problem, a simple device for paying out photovoltaic DC cables is proposed, comprising a cable reel wound with a cable, the end face of the cable reel facing upward, the outer width of the cable reel is L, the diameter of the reel surface is D, the diameter of the axial hole is d, and a pay-off component is inserted into the axial hole. The pay-off component comprises a vertical rod, a horizontal rod and a circular ring. The vertical rod is inserted into the axial hole in the middle of the cable reel and tilted naturally, one end of the horizontal rod is connected to the upper end of the vertical rod exposed to the outside, and the other end of the horizontal rod is connected to the circular ring, and the opening of the circular ring is vertically downward; the simple device for paying out photovoltaic DC cables also includes a fixed pulley for changing the direction of the cable, and the fixed pulley is connected to the ceiling and is arranged directly above the axial hole of the cable reel.

[0004] The technical solution of the utility model is to set up the structure of the wire-paying assembly, so that the cable passes through the circular ring of the wire-paying assembly and is continuously paid out from the cable drum, thereby driving the wire-paying assembly to rotate continuously to prevent the wire from being entangled. The overall structure of the device is simple, and it is easy to make and carry, with fewer restrictions, and can be used in various environments. The cable direction is changed by setting a fixed pulley, which makes it easier to lay the cable.

[0005] Preferably, the cross-section of the vertical rod is circular, the diameter of the circle is in the range of 20-50 mm, the distance between the contact point between the vertical rod and the upper end face of the cable drum and the connection point between the vertical rod and the horizontal rod is A, and the value range of A is 100-1000 mm, which can ensure that the horizontal rod will not contact the upper end face of the cable drum due to inclination, causing friction and preventing normal rotation, resulting in failure to lay out the cable normally.

[0006] Preferably, the cross-section of the horizontal rod is circular, the diameter of the circle is in the range of 6-12 mm, the length of the horizontal rod is B, the value range of B is 0.5D+d-D, and the horizontal rod has a certain length, which makes its outermost end located outside the outer contour of the cable reel. The cable does not need to be bent when it is laid out, and the laying out of the cable is normal.

[0007] Preferably, the outer diameter of the ring is in the range of 6-12 mm, and the inner diameter of the ring is larger than the diameter of the cable on the cable drum, and the ring is used to pass the cable and limit its position.

[0008] Preferably, the distance between the fixed pulley and the upper end surface of the cable drum is H, H>1.5L, H>1.5L, to ensure that the angle of the cable is large enough when it passes around the fixed pulley upward, and the line release will not be stuck due to excessive friction, etc., affecting normal efficiency.

[0009] Preferably, the cable tap on the cable drum passes through the circular ring, bypasses the fixed pulley upward and continues to extend, and the extension direction is the direction of cable laying. The cable laying direction is consistent with the cable extension direction after the fixed pulley changes direction. The friction is small and the cable release is smooth. Therefore, the overall laying is more convenient and the efficiency is greatly improved.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] The technical solution of the utility model is to set up the structure of the wire-paying assembly, so that the cable passes through the circular ring of the wire-paying assembly and is continuously paid out from the cable drum, thereby driving the wire-paying assembly to rotate continuously to prevent the wire from being entangled. The overall structure of the device is simple, and it is easy to make and carry, with fewer restrictions, and can be used in various environments. The cable direction is changed by setting a fixed pulley, which makes it easier to lay the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic elevation diagram of a simple device for laying out photovoltaic DC cables;

[0013] Among them: 1-vertical rod, 2-horizontal rod, 3-circular ring, 4-fixed pulley, L-outer width of cable drum, D-cable drum surface diameter, d-cable drum shaft hole diameter. DETAILED DESCRIPTION

[0014] The following will be combined with the attached embodiment of the present utility model Figure 1 , the technical solutions in the embodiments of the utility model are described in detail. Example 1

[0015] like Figure 1As shown, the utility model is a simple device for paying out photovoltaic DC cables, including a cable reel wound with a cable, the end face of the cable reel facing upward, the outer width of the cable reel is defined as L, the diameter of the cable reel surface is D, the diameter of the cable reel axial hole is d, and a pay-out assembly is inserted into the axial hole. The pay-out assembly includes a vertical rod 1, a horizontal rod 2 and a ring 3. The vertical rod 1 is inserted into the axial hole, one end of the horizontal rod 2 is welded and fixed to the upper end of the vertical rod 1 exposed to the outside, and the other end of the horizontal rod 2 is welded and fixed to the ring 3. The dimensions of the various structural parts of the pay-out assembly are associated with the relevant data of the cable reel.

[0016] The vertical rod 1 is a round metal rod with a diameter ranging from 20 to 50 mm. The vertical rod 1 has a large overall mass and is not easy to detach from the axial hole of the cable drum. The vertical rod 1 is inserted into the axial hole of the cable drum and tilts naturally. The distance between the contact point between the vertical rod 1 and the upper end surface of the cable drum and the connection point between the vertical rod 1 and the horizontal rod 2 is A, and the value range of A is 100 to 1000 mm. This distance can ensure that the horizontal rod 2 will not fit against the upper end surface of the cable drum to generate friction or get stuck, causing the device to fail to work normally.

[0017] The cross-section of the horizontal rod 2 is circular, and the diameter of the circle ranges from 6 to 12 mm. The length of the horizontal rod 2 is B, and the value range of B is 0.5D+d-D. This length range can ensure that even if the pay-off assembly is tilted as a whole, the length of the horizontal rod 2 can still ensure that its outermost side is outside the outer contour of the cable drum, so that the cable does not need to be bent when passing through the ring, reducing friction and ensuring smooth pay-off. At the same time, the distance outside the outer contour will not be too large, resulting in reduced efficiency and affecting the smoothness of pay-off.

[0018] Ring 3 is used to pass the cable and limit it. The opening of ring 3 is vertically downward, so that it can release the wire normally without getting tangled. The outer diameter of ring 3 ranges from 6 to 12 mm. The inner diameter of ring 3 needs to be larger than the diameter of the laid cable, otherwise the cable will not be able to pass through ring 3 and the device will not work properly.

[0019] The simple device for releasing the photovoltaic DC cable also includes a fixed pulley 4 for changing the direction of the cable. The fixed pulley 4 is fixedly connected to the ceiling by bolts. The fixed pulley 4 is located directly above the axial hole of the cable drum. The distance between the fixed pulley 4 and the upper end surface of the cable drum is H, H>1.5L, to ensure that the angle of the cable is large enough when it passes around the fixed pulley upward, and the cable will not bend, etc., to avoid excessive friction and other reasons that may cause the release of the cable to be stuck, affecting normal efficiency.

[0020] When in use, the cable tap on the cable drum passes through the ring 3 and continues upward and around the fixed pulley 4, and then extends outward. The extension direction is the direction of cable laying. Therefore, when the cable tap is pulled, the cable on the cable drum will be released in circles, thereby driving the wire-releasing assembly to rotate continuously. Since the vertical rod 1 of the wire-releasing assembly has a large mass, it is not easy to separate from the shaft hole during rotation. Therefore, the wire protection process can be maintained normal without causing entanglement.

[0021] The method of using the simple photovoltaic DC cable laying device of this embodiment is as follows:

[0022] Insert the end of the vertical rod 1 of the pay-off assembly away from the horizontal rod 2 downward into the axial hole in the middle of the cable drum, then take out the cable tap on the cable drum, pass it through the ring 3 at the end of the horizontal rod 2, and continue upward, bypass the fixed pulley 4 installed on the ceiling, and extend in the direction of cable laying. When the cable needs to be released for laying, the cable tap is pulled to continuously release the cable from the cable drum. Since the cables are all wrapped around the cable drum, during the pay-off process, the pay-off assembly will continue to rotate as the cables are released, and since the vertical rod 2 is inserted in the axial hole, the pay-off assembly will not separate from the axial hole during rotation, and the cable will not be entangled, resulting in failure to release the cable normally.

[0023] The above embodiments are only for illustrating the technical idea of ​​the present utility model, and cannot be used to limit the protection scope of the present utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A simple device for releasing a photovoltaic DC cable, comprising a cable drum wound with a cable, the end face of the cable drum facing upward, the outer width of the cable drum is L, the diameter of the drum surface is D, the diameter of the shaft hole is d, and the release assembly is inserted into the shaft hole, characterized in that: The laying-out assembly comprises a vertical rod (1), a horizontal rod (2) and a circular ring (3); the vertical rod (1) is inserted into an axial hole in the middle of a cable drum and is naturally inclined; one end of the horizontal rod (2) is connected to the upper end of the vertical rod (1) exposed to the outside; the other end of the horizontal rod (2) is connected to the circular ring (3); the opening of the circular ring (3) is vertically downward; the simple photovoltaic DC cable laying-out device further comprises a fixed pulley (4) for changing the direction of the cable; the fixed pulley (4) is connected to the ceiling and is arranged directly above the axial hole of the cable drum.

2. A simple device for laying out a photovoltaic DC cable according to claim 1, characterized in that: The cross section of the vertical rod (1) is circular, the diameter of the circle is in the range of 20-50 mm, the distance between the contact point of the vertical rod (1) and the upper end surface of the cable drum and the connection point of the vertical rod (1) and the horizontal rod (2) is A, and the value range of A is 100-1000 mm.

3. A simple device for releasing a photovoltaic DC cable according to claim 1, characterized in that: The cross section of the horizontal rod (2) is circular, the diameter of the circle is in the range of 6-12 mm, the length of the horizontal rod (2) is B, and the value range of B is 0.5D+d-D.

4. A simple device for laying out a photovoltaic DC cable according to claim 1, characterized in that: The outer diameter of the ring (3) is in the range of 6-12 mm, and the inner diameter of the ring (3) is larger than the diameter of the cable on the cable reel.

5. A simple device for laying out a photovoltaic DC cable according to claim 2, characterized in that: The distance between the fixed pulley (4) and the upper end surface of the cable drum is H, where H>1.5L.

6. A simple device for laying out a photovoltaic DC cable according to claim 1, characterized in that: The cable tap on the cable drum passes through the ring (3), then passes around the fixed pulley (4) upwards and continues to extend, and the extension direction is the direction in which the cable is laid.

Images