WO2011147120A1

WO2011147120A1 - Photovoltaic cell cable connector

Info

Publication number: WO2011147120A1
Application number: PCT/CN2010/075648
Authority: WO
Inventors: 吕纪坤
Original assignee: Lv Jikun
Priority date: 2010-05-28
Filing date: 2010-08-03
Publication date: 2011-12-01

Abstract

A photovoltaic cell cable connector includes an anode plug (1) and a cathode plug (2) connected with the anode plug by being inserted. The anode plug and the cathode plug are thread-connected with seal nuts (3) at their non-inserting ends respectively. An anode terminal (4) connected with a photovoltaic cable is fastened in an inner hole of the anode plug. A cathode terminal (5) is fastened in an inner hole of the cathode plug and electrically connected with the anode terminal. An elastic seal member (6), through which the photovoltaic cable can pass, is provided in the inner chamber of the seal nut. The elastic seal members shrink radially to bundle closely the passing photovoltaic cables while the seal nuts are screwed down on the anode plug and the cathode plug. The cable connector solves the problems of large contact resistance, lower electrical conductivity, unsatisfied seal performance, inconvenience on assembling and disassembling, and poor handfeel when operating in the prior cable connector.

Description

Photovoltaic battery cable connector

The invention relates to the technical field of photovoltaic cell modules, in particular to a photovoltaic cell cable connector. Background technique

At present, the cable connectors used in solar power generation systems commonly used in the market generally have stamping parts inside, and the roundness is not too high, and it is necessary to increase the number of the drum springs to meet the use requirements, which increases the conductive links. The contact resistance is increased, and the electrical conductivity is lowered. When the ends of the connector are removed, the space of the buckle portion that needs to be pressed is narrow, and the finger of the person is pressed when pressed, and the finger of the existing connector is pinched at both ends of the connector. The edges and corners are hard and the surface is smooth. When the force is applied, people feel uncomfortable and slippery, which increases the difficulty of the operator. The sealing nut used for sealing the two ends of the connector also has many unreasonable places. The first is the seal. The annular cylinder is used. After the nut is tightened, there is still a large gap between the cable and the seal, leaving a hidden danger of moisture entering the water. On the other hand, the inside of the sealing nut is used for the tightening of the cable. The vertical long arm has a relatively rigid structure. After the head is tightened, there is still a large gap at the end, making it difficult to make the ring. The seals achieve the desired sealing effect. It is also very difficult and difficult for the operator to tighten the nut. Moreover, the outer surface of the nut has only the anti-slip pattern and there is no fastening surface for the tool to hold, which is not suitable for outdoor work.

Summary of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a photovoltaic cell cable connecting device with small contact resistance, high electrical conductivity, good sealing performance, convenient installation and disassembly, and comfortable operation.

The technical solution adopted by the present invention to solve the technical problem thereof is: a photovoltaic battery cable connector, comprising a positive plug and a negative plug connected to the plug, and a non-paired end of the positive plug and the negative plug The sealing nut is connected to the threaded connection, the positive terminal of the connecting photovoltaic cable is clamped in the inner hole of the positive plug, the negative terminal is clamped in the inner hole of the negative plug and electrically connected with the positive terminal, and the inner cavity of the sealing nut is set There is an elastic seal that can be worn through the photovoltaic cable. During the process of tightening the seal nut to the positive plug and the negative plug respectively, the elastic seal is radially contracted and wrapped around the inserted photovoltaic cable.

In order to realize the reliable plugging of the positive and negative plugs, the front end of the positive plug has a plug-in cylinder, and the positive plug is located at the rear of the plug cylinder and is provided with an elastic arm symmetrically with respect to the center of the plug cylinder, and the inner hole of the negative plug The front end portion is a plug-in inner hole into which the plug-in cylinder can be inserted, and the front end of the negative-electrode plug has a lap hole for elastically engaging the elastic arm.

Further, in order to ensure the sealing property after the positive and negative plugs are plugged, the positive plug is located at the rear of the plug cylinder, and an elastic rectangular arm is provided with an annular rectangular groove, and the rectangular groove is provided with a seal. After the positive plug and the negative plug are butted, the inner wall of the front end of the insertion inner hole is pressed against the sealing ring.

In order to achieve reliable connection between the positive and negative terminals, the front end of the positive terminal has an elastic inner hole, the front end of the negative terminal has a guiding spherical surface, and the negative terminal is inserted into the elastic inner hole of the positive terminal through the guiding of the guiding spherical surface to realize the two. Electrical connection between.

In order to ensure a good sealing property after the photovoltaic cable is connected, a tightening ring is arranged between the inner wall of the inner cavity of the sealing nut and the elastic sealing member, and the tightening ring is sleeved on the outer surface of the elastic sealing member, the sealing nut The inner cavity has a cone section, and one end of the tightening ring has a protruding inclined platform matched with the cone section, and the beveling section of the conical section presses the tightening ring during the process of tightening the sealing nut to the positive plug and the negative plug The protruding ramps cause radial shrinkage of the take-up ring to press the front end of the elastomeric seal against the threaded photovoltaic cable.

In order to ensure good sealing between the positive and negative plugs and the sealing nut, the rear end of the positive plug and the negative plug respectively have a sealing groove, and the rear end of the elastic sealing member has a sealing round table, and the sealing nut is tightened at the positive plug and the negative pole. During the process of the plug, the sealing round table of the elastic seal is pressed into the sealing groove Inside.

In order to ensure accurate positioning of the positive terminal and the negative terminal in the inner hole of the positive plug and the negative plug, the rear end portions of the inner hole of the positive plug and the negative plug respectively have inner grooves, and the inner grooves are provided for the card The limit ring of the positive terminal and the rear end of the negative terminal.

In order to facilitate the operation and comfort, the outer surface of the positive plug and the negative plug respectively have a curved anti-slip surface which is convenient for the fingers to be pinched when being assembled and disassembled, and the outer surface of the negative plug has an elastic snap-in at the proximal overlapping hole. Or the slanting inclined surface which is easy to force when exiting the lap hole. In order to facilitate manual tightening or tightening the sealing nut by using a tool, the outer surface of the sealing nut is circumferentially equally divided with at least four finger-shaped concave planes. .

The invention has the advantages of high electrical conductivity, good connection strength, convenient disassembly, reliable operation, and the connection between the conductors is a cylindrical surface contact, thereby improving the contact area, between the terminal and the terminal, between the terminal and the cable. The connection pressure is large, on the one hand, the contact resistance is lowered, on the other hand, the connection reliability is improved, and the positive plug and the negative plug are assembled and disassembled by the human body functional structure design, thereby improving the installation efficiency and the operation comfort, and the cable The sealing is achieved by the radial contraction of the elastic sealing member, so that the elastic sealing member is wrapped around the inserted photovoltaic cable to achieve a better sealing effect, and the finger-shaped concave surface of the outer surface of the sealing nut is convenient for manual operation. The grip is easy to use when holding the tool.

DRAWINGS

The invention will now be further described with reference to the drawings and embodiments.

Figure 1 is a schematic view of the structure of the present invention.

Figure 2 is a cross-sectional view of A-A in Figure 1.

In the figure, 1. positive plug 11. plug-in cylinder 12. elastic arm 13. rectangular groove 14. sealing groove 15. inner groove 16. curved anti-slip surface 2. negative plug 21. plug inner hole 22. Hole 23. slanted bevel 3. sealing nut 31. cone section 32. concave plane 4. positive terminal 41. elastic Inner hole 5. Negative terminal 51. Guide spherical surface 6. Elastic seal 61. Sealing round table 7. Sealing ring 8. Tightening ring 81. Projecting inclined table 9. Limit ring

detailed description.

The invention will now be further described with reference to the drawings. The drawings are simplified schematic diagrams only to illustrate the basic structure of the invention in a schematic manner, and thus only show the configurations related to the present invention.

As shown in FIG. 1 and FIG. 2, a photovoltaic cell cable connector includes a positive plug 1 and a negative plug 2 connected thereto, and a non-interposing end of the positive plug 1 and the negative plug 2 are respectively screwed with a sealing nut 3, the front end of the positive plug 1 has a plug-in cylinder 11, the positive plug 1 is located at the rear of the plug-in cylinder 11 and is symmetrically disposed with two upper and lower elastic arms 12 symmetrically with respect to the center of the plug-in cylinder 11, and the negative plug 2 has a plug-in inner hole 21, the front end of the negative plug 2 has a lap hole 22 for elastically engaging the elastic arm 12, and the plug cylinder 11 of the positive plug 1 is inserted into the insertion hole 21 of the negative plug 2, and the elastic arm of the positive plug 1 12 elastically snaps into the overlapping hole 22 of the negative plug 2 to realize the docking of the positive plug 1 and the negative plug 2, and the positive terminal 4 and the negative terminal 5 connected to the photovoltaic cable are all turned by using a brass piece with good electrical conductivity. The positive terminal 4 is inserted into the inner hole of the positive plug 1, and the negative terminal 5 is inserted into the inner hole of the negative plug 2 and electrically connected to the positive terminal 4, and the front end of the positive terminal 4 has elasticity. 41. The outer wall of the elastic inner hole 41 has four notches open in the circumferential direction, and the front portion of the notch is reduced in the diameter direction to form a tightened annular surface to better fit the outer wall of the negative electrode terminal 5, and the negative electrode The front end of the terminal 5 has a guiding spherical surface 51. After the negative terminal 5 is inserted from the rear end of the negative electrode plug 2, it is guided by the guiding spherical surface 51 to be inserted into the elastic inner hole 41 of the positive terminal 4 to electrically connect the two.

The inner cavity of the sealing nut 3 is provided with an elastic sealing member 6 through which the photovoltaic cable can be passed. The inner wall of the inner surface of the sealing nut 3 and the elastic sealing member 6 are provided with a tightening ring 8, and the tightening ring 8 is sleeved On the outer surface of the elastic seal 6, the elastic seal 6 is made of rubber, which has an inner hole passing through the photovoltaic cable, the inner hole has a certain taper, the diameter of the photovoltaic cable penetrates is large, and then slowly Zoom out until the PV cable is wrapped, The outer wall of the rubber seal 6 is a cylindrical surface having a certain inclination, and cooperates with the inner wall of the tightening ring 8. The inner cavity of the sealing nut 3 has a cone section 31, and the end of the tightening ring 8 has the cone section 31 mating protruding ramps 81 having twelve long arm jaws that are circumferentially uniform and oblique with respect to the center of the take-up ring 8, each having a certain oblique direction between the long arm jaws The gap, in the process of tightening the sealing nut 3 to the positive plug 1 and the negative plug 2, the bevel of the conical section 31 of the inner cavity of the sealing nut 3 presses the end of the long arm jaw, causing the long arm jaw to radially contract and fill the length The gap between the arm jaws, the inner wall of the long arm jaw formed after contraction completely uniformly annularly presses the outer wall of the front end portion of the elastic sealing member 6, and presses the elastic sealing member 6 against the inserted photovoltaic cable. Thereby, the sealing between the elastic rubber member 6 and the photovoltaic cable is achieved.

The rear ends of the positive plug 1 and the negative plug 2 respectively have a sealing groove 14 , and the rear end portion of the elastic sealing member 6 has a sealing circular table 61. During the process of tightening the sealing nut 3 to the positive plug 1 and the negative plug 2, the elastic The sealing round table 61 of the sealing member 6 is pressed into the sealing groove 14, thereby achieving a seal between the elastic sealing member 6 and the positive electrode plug 1 and the negative electrode plug 2.

An annular rectangular groove 13 is defined in the rear of the plug-in cylinder 11 of the positive plug 1 and between the two elastic arms 12, and a sealing ring 7 is arranged in the rectangular groove 13 in the positive plug 1 and the negative plug 2 After the docking, the front end portion of the insertion inner hole 21 of the negative electrode plug 2 is pressed against the seal ring 7, thereby achieving sealing between the positive electrode plug 1 and the negative electrode plug 2.

In order to ensure accurate positioning of the positive terminal 4 and the negative terminal 5 in the inner holes of the positive plug 1 and the negative plug 2, the rear end portions of the inner plugs of the positive plug 1 and the negative plug 2 respectively have inner grooves 15, respectively A limiting ring 9 for clamping the rear end portion of the positive terminal 4 and the negative terminal 5 is disposed in the groove 15, and the positive terminal 4 and the negative terminal 5 are respectively clamped to the positive plug 1 and the negative plug by the action of the limiting ring 9. 2 in the inner hole.

For convenience and comfort during operation, the positive plug 1 and the negative plug 2 have respective outer surfaces There is a curved anti-slip surface 16 which is convenient for fingers to pick up and disassemble. This part is designed according to the shape of the thumb and forefinger of the person to design a comfortable pressing surface, and at the same time, the anti-slip line is added on the curved anti-slip surface 16 to improve the friction and avoid the dismantling. When the finger slides on the outer surface of the negative electrode plug 2, the slanted inclined surface 23 is provided at the near-lapped hole 22 on the outer surface of the negative electrode plug 2 when the elastic arm 12 elastically snaps into or exits the overlapping hole 22, when the thumb and the index finger are used. When the connector is removed, the rear portion of the palm of the finger is focused on the slanted slope 23 of the negative plug 2, and the front portion of the palm of the finger is focused on the head of the elastic arm 12, at which time the head of the elastic arm 12 is inward. Shrinking until exiting from the overlapping hole 22; and on the outer surface of the body of the sealing nut 3, circumferentially aliquoting is provided with at least four finger-shaped concave planes 32, which are convenient for manual tightening or loosening When the sealing nut 3 is opened, the finger is grasped, and on the other hand, the wrench is easily inserted to realize the tightening or loosening of the sealing nut 3.

The invention has high conductivity, good connection strength, convenient disassembly and reliable operation, and the connection between the conductors is a cylindrical surface contact, thereby improving the contact area, and the connection between the terminal and the terminal and between the terminal and the cable is large. The contact resistance is lowered, and the connection reliability is also improved. The mounting position and the disassembly of the positive plug 1 and the negative plug 2 are designed by the human body function structure, thereby improving the installation efficiency and the comfort level, and the elastic seal 6 and the photovoltaic line Between the cables, the elastic sealing member 6 and the positive plug 1 and the negative plug 2 have good sealing performance, and the installation and disassembly are convenient and quick.

The above embodiments are merely illustrative of the technical concept and the features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the present invention, and the scope of the present invention is not limited thereto. Equivalent changes or modifications made in substantial form are intended to be included within the scope of the invention.

Claims

Claim WO 2011/147120 PCT/CN2010/075648

A photovoltaic cell cable connector comprising a positive plug (1) and a negative plug (2) connected thereto, wherein: a non-paired end of the positive plug (1) and the negative plug (2) respectively The threaded connection has a sealing nut (3), the positive terminal (4) connecting the photovoltaic cable is clamped in the inner hole of the positive plug (1), and the negative terminal (5) is clamped in the inner hole of the negative plug (2) and Electrically connected to the positive terminal (4), the inner cavity of the sealing nut (3) is provided with an elastic sealing member (6) through which the photovoltaic cable can be passed, and the sealing nut (3) is respectively tightened on the positive plug (1) During the process of the negative plug (2), the elastic seal (6) is radially contracted and wrapped around the inserted photovoltaic cable.

2 . The photovoltaic cell cable connector according to claim 1 , wherein: the front end of the positive plug (1) has a plug-in cylinder (11), and the positive plug (1) is located on the plug-in cylinder (11). The rear part is symmetrically disposed with a resilient arm (12) symmetrically with respect to the center of the plug cylinder (11), and the front end of the inner hole of the negative plug (2) is a plug-in inner hole (21) into which the plug cylinder (11) can be inserted. The front end of the negative plug (2) has a lap hole (22) for elastically engaging the elastic arm (12).

The photovoltaic cell cable connector according to claim 2, wherein: the positive plug (1) is located at the rear of the plug cylinder (11), and the elastic arm (12) is provided with a ring. a rectangular recess (13), and a rectangular ring (13) is provided with a sealing ring (7). After the positive plug (1) and the negative plug (2) are butted, the inner wall of the front end of the inner hole (21) is inserted. Press down on the seal (7).

The photovoltaic cell cable connector according to claim 1, wherein: the front end of the positive terminal (4) has an elastic inner hole (41), and the front end of the negative terminal (5) has a guiding spherical surface (51) , the negative terminal (5) is inserted into the elastic inner hole of the positive terminal (4) by guiding the guiding spherical surface (51)

(41) realizes the electrical connection between the two.

The photovoltaic cell cable connector according to claim 1, wherein: a sealing ring (8) is disposed between the inner wall of the inner cavity of the sealing nut (3) and the elastic sealing member (6), The tightening ring (8) is sleeved on the outer surface of the elastic sealing member (6), and the inner cavity of the sealing nut (3) has a cone section (31) for tightening Claim

WO 2011/147120 PCT/CN2010/075648 circle (8) - end having a protruding ramp (81) cooperating with the cone section (31), tightening the sealing nut (3) to the positive plug (1) and the negative pole During the process of the plug (2), the inclined surface of the conical section (31) presses the protruding inclined table (81) of the tightening ring (8), causing the tightening ring (8) to radially contract and elastically seal the elastic seal (6). The front end of the ) is pressed against the threaded PV cable.

The photovoltaic cell cable connector according to claim 1, wherein: the rear end of the positive plug (1) and the negative plug (2) respectively have a sealing groove (14), and an elastic seal (6) The rear end portion has a sealed round table (61), and the sealing round table (61) of the elastic sealing member (6) is pressed during the process of tightening the sealing nut (3) to the positive plug (1) and the negative plug (2) Inside the seal groove (14).

The photovoltaic cell cable connector according to claim 1, wherein: the rear end portions of the inner hole of the positive plug (1) and the negative plug (2) respectively have inner grooves (15), The inner groove (15) is provided with a retaining ring (9) for clamping the rear end portion of the positive terminal (4) and the negative terminal (5).

The photovoltaic cell cable connector according to claim 1, wherein: the outer surface of the positive plug (1) and the negative plug (2) respectively have a curved anti-slip which is convenient for the fingers to be pinched when being assembled and disassembled. On the outer surface of the negative plug (2), the near-lapped hole (22) has a slanted bevel which is easy to force when the elastic arm (12) elastically snaps into or exits the overlapping hole (22) (23) The outer surface of the sealing nut (3) is circumferentially equally divided by at least four finger-shaped concave planes (32).