Wire-stripping-free photovoltaic direct-current circuit breaker device

Abstract

The invention relates to the technical field of photovoltaic intelligent terminal equipment, and particularly discloses a wire-stripping-free photovoltaic direct current circuit breaker device, which is characterized in that wire inlet cabinets which penetrate through each other are integrally formed on two sides of a residual current circuit breaker, a wire guide plate, a limiting plate and a pressing plate are sequentially inserted into the wire inlet cabinets, and a plurality of wire guide grooves are uniformly formed in the wire guide plate; array type rectangular grooves are uniformly formed in the limiting plate, wire contact pieces corresponding to the rectangular grooves in the limiting plate in position are arranged on the pressing plate, the rectangular grooves are used for allowing the wire contact pieces on the pressing plate to pass through, and the limiting plate is used for limiting the lower limit of the pressing plate and preventing the pressing plate from being excessively pressed downwards to damage the wire contact pieces; the problems that wires need to be stripped during connection of inlet and outlet terminals of a traditional circuit breaker, the wire stripping process is directly exposed in the air, a copper core after wire stripping is in contact with the air and is easy to age, the circuit breaker is damaged, and economic loss is caused are solved.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic intelligent terminal equipment, and specifically discloses a stripping-free photovoltaic DC circuit breaker device. Background Art

[0002] Photovoltaic industry refers to the industry that uses solar energy to convert sunlight into electrical energy. It makes full use of renewable energy, is environmentally friendly and has broad development prospects. With the rapid growth of the global population and economic development, energy demand has increased significantly, and the supply pressure of traditional energy has also increased. At the same time, the emission of fossil energy has had a serious impact on the environment, presenting problems such as greenhouse effect and climate change. Traditional energy such as oil and coal are limited resources, and the pressure on the environment is gradually emerging. As a non-renewable energy source, solar energy has broad potential and is an important choice to replace traditional energy.

[0003] The connection of the input and output terminals of traditional circuit breakers requires stripping of the wires. If the exposed length of the stripped copper core is too short, it is easy to cause poor contact and heat; if the exposed length of the stripped copper core is too long, it is easy to cause the copper core to touch accidentally and cause a phase-to-phase short circuit or a ground short circuit. The fixing of the wires at the input and output terminals of traditional circuit breakers requires the use of a screwdriver to tighten the screws and press them down for friction fixation. The exposed copper core, tightening screws and extrusion chamber are not in a relatively closed environment and are directly exposed to the air. They are easily oxidized by the air, causing the screws and extrusion chamber to rust and loosen the wires or make them unable to be screwed out, accelerating the aging of the wire rubber and causing failures. These disadvantages may cause energy waste and may even damage circuit breakers and other equipment, resulting in economic losses.

[0004] In view of this, there is an urgent need for a stripping-free photovoltaic DC circuit breaker device, which can achieve the connection between the wire and the circuit breaker without stripping and provide a relatively closed environment for the copper core to prevent the copper core from contacting the air and slowing down aging. The connection between the wire and the circuit breaker can be completed without tools, which is convenient and fast, ensuring the personal safety of the operating staff while providing effective protection for the safety of the load lines of the power system. Summary of the invention

[0005] In view of this, in order to solve the problem that the connection of the traditional circuit breaker's input and output terminals requires wire stripping, the stripping process is directly exposed to the air, and the copper core after stripping is easily aged when exposed to air, which leads to damage to the circuit breaker and causes economic losses. The present invention provides a photovoltaic DC circuit breaker device without wire stripping, which uses the pressing of contact pieces to achieve direct contact between the wires and the circuit breaker, and fundamentally solves a series of problems caused by wire stripping that is too long or too short, and provides the wires with a relatively closed environment to reduce air oxidation and protect the wires. The connection between the wires and the circuit breaker can be completed without the use of tools. The lever principle can be used to bend the middle section of the stud to rotate more labor-savingly, and after tightening, the buckle can be directly buckled into to prevent the wire from loosening, ensuring safe and reliable contact without loosening.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A stripping-free photovoltaic DC circuit breaker device, wherein both sides of the leakage circuit breaker are integrally formed with mutually penetrating incoming line cabinets, wherein a wire plate, a limit plate and a pressure plate are sequentially inserted in the incoming line cabinets, wherein the limit plate is located between the wire plate and the pressure plate, wherein a plurality of wire grooves for placing wires are evenly provided on the wire plate, wherein the limit plate is evenly provided with an array of rectangular grooves, wherein the pressure plate is provided with a contact piece corresponding to the position of the rectangular groove on the limit plate, wherein the rectangular groove on the limit plate is used for allowing the contact piece on the pressure plate to pass through, and the limit plate is used for limiting the lower limit of the pressure plate to prevent the pressure plate from being pressed too downward and damaging the contact piece.

[0008] Furthermore, a threaded hole is provided on the side wall of the incoming line cabinet, and a bolt for pressing the pressure plate is threadedly connected in the threaded hole.

[0009] Furthermore, the upper and lower parts of the bolt are hingedly connected. The screw rod of the upper part of the bolt is a smooth rod and the end is threadedly connected with a hand-rubbing wheel. The lower part of the bolt is a threaded screw rod. The bolt can be screwed in and out of the screw hole on the side wall of the incoming cabinet. The bolt is tightened or unscrewed by the hand-rubbing wheel at the end of the smooth rod section.

[0010] Furthermore, the contact piece is a sharp three-pronged copper piece, the surface of which is plated with a nickel layer to resist oxidation and prevent rust, and a gold layer to enhance conduction and stabilize transmission.

[0011] Furthermore, the wire plate has three wire grooves, the rectangular grooves on the limiting plate are in a 3×3 array, and the contact pieces on the pressure plate are in a 3×3 array corresponding to the positions of the rectangular grooves on the limiting plate.

[0012] Furthermore, the conductor plate has four conductor grooves, the rectangular grooves on the limiting plate are in a 4×4 array, and the contact pieces on the pressing plate 4 are in a 4×4 array corresponding to the positions of the rectangular grooves on the limiting plate.

[0013] Furthermore, a buckle is provided on the surface of the incoming cabinet 1 outside the threaded hole on the side wall of the incoming cabinet, and the buckle is used to fix the bare rod of the upper part of the bolt.

[0014] Furthermore, the incoming line cabinet is a hollow rectangular cabinet for accommodating internal structural components of the circuit breaker.

[0015] Furthermore, the conductor plate is made of insulating material to prevent the conductors from accidentally touching each other.

[0016] The working principle and beneficial effects of this solution are:

[0017] 1. The stripping-free photovoltaic DC circuit breaker device disclosed in the present invention has the circuit breaker inlet and outlet ports guiding the wires through the wire grooves on the wire board in the incoming cabinet. The contact pieces on the pressure plate pass through the rectangular grooves on the limit plate and pierce the surface of the wires to contact the copper core inside the wires. Each wire contacts four contact pieces to ensure a larger contact area, thereby stabilizing the connection between the wires and the contact pieces. The entire device can achieve the elimination of wire stripping when connecting the wires, thereby preventing the problem of poor contact and heating when the exposed length of the stripped copper core is too short; and the problem of the copper core accidentally touching and causing a phase-to-phase short circuit or a ground short circuit when the exposed length of the stripped copper core is too long. The entire device can achieve direct contact without stripping the wires connected to the inlet and outlet terminals of the circuit breaker, avoiding the economic losses caused by oxidation damage caused by the copper core of the wire being exposed or short circuit caused by excessive exposure.

[0018] 2. The stripping-free photovoltaic DC circuit breaker device disclosed in the present invention provides a relatively closed environment for the copper core inside the wire with the contact piece instead of being directly exposed to the air, and is not easily oxidized by air to accelerate aging and cause failures. This device can complete the connection between the wire and the circuit breaker without tools, which is convenient and quick while ensuring the personal safety of the staff operating. The contact area between the contact piece and the copper core inside the pierced wire is adjusted by the cooperation of the bolt and the pressure plate, and the upper and lower parts of the hinged bolt can use the lever principle to rotate the screw more labor-saving, and after tightening, it can be directly buckled into the buckle to prevent the wire from loosening, ensuring safe and reliable contact. In this way, there is no need to use wire stripping tools and screwdrivers to tighten the import and export terminals, which is convenient and quick, while also ensuring the personal safety of the staff operating, and providing effective protection for the safety of the load lines of the power system.

[0019] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an overall structural diagram of the stripping-free photovoltaic DC circuit breaker device of the present invention;

[0021] Figure 2 For the present invention Figure 1 Schematic diagram of the central incoming line cabinet;

[0022] Figure 3 For the present invention Figure 1 Schematic diagram of the middle wire duct;

[0023] Figure 4 For the present invention Figure 1 Schematic diagram of the middle limit plate;

[0024] Figure 5 For the present invention Figure 1 Schematic diagram of the intermediate pressure piece and contact piece;

[0025] Figure 6 For the present invention Figure 1 Schematic diagram of the bolt;

[0026] Figure 7 For the present invention Figure 1 Schematic diagram of the bending of the bolt;

[0027] Figure 8 For the present invention Figure 1 Schematic diagram of the middle buckle.

[0028] The markings in the accompanying drawings are as follows: incoming line cabinet 1, wire board 2, limit plate 3, pressure plate 4, contact piece 4-1, bolt 5, bare rod 5-1, buckle 6. DETAILED DESCRIPTION

[0029] The following is further described in detail through specific implementation methods:

[0030] like Figure 1 The photovoltaic DC circuit breaker device without wire stripping shown in the figure has a switch on the leakage circuit breaker, which is a necessary structure on the leakage circuit breaker. The two sides of the leakage circuit breaker are integrally formed with mutually penetrating incoming line cabinets 1, such as Figure 2 As shown, the incoming line cabinet 1 is a rectangular cabinet used to place internal structural components of the circuit breaker and is made of insulating material.

[0031] The incoming line cabinet 1 is hollow, and a conductor plate 2, a limit plate 3 and a pressure plate 4 are sequentially inserted in the incoming line cabinet 1. The conductor plate 2 is used to guide the conductors so that the conductors can be separated and in good contact with the contact piece. Figure 3 As shown, a plurality of wire slots are evenly arranged on the wire board 2, and the wire slots on the wire board 2 can be three slots or four slots, and the four slots are used for three-phase four-wire connection. The wire board 2 is made of insulating material, which can prevent the phases of the wires from accidentally touching each other to a certain extent.

[0032] Take the example of opening four slots on the conductor plate 2. Figure 4 As shown, the limit plate 3 is located between the wire plate 2 and the pressure plate 4, and 16 rectangular grooves in a 4×4 array are evenly opened on the limit plate 3. The pressure plate 4 is provided with 16 contact pieces 4-1 in a 4×4 array corresponding to the positions of the rectangular grooves on the limit plate 3. The rectangular grooves allow the contact pieces 4-1 on the pressure plate 4 to pass normally. The limit plate 3 is used to limit the lower limit of the pressure plate 4 to prevent the pressure plate 4 from being pressed too downward and damaging the contact piece 4-1.

[0033] like Figure 5As shown, a threaded hole is provided on the side wall of the incoming cabinet 1, and a bolt 5 for pressing the pressing plate 4 is connected with a thread in the threaded hole. The pressing plate 4 is located between the limit plate 3 and the bolt 5. The pressing plate 4 is evenly provided with a 4×4 array of contact pieces 4-1 on one side facing the limit plate 3. The contact pieces 4-1 are sharp three-pronged copper pieces, and the surface is plated with a nickel layer to resist oxidation and prevent rust and strengthen the conduction and stable transmission of the gold layer. The bolt 5 can be pressed down by the pressing plate 4 so that the contact piece 4-1 on the pressing plate passes through the rectangular groove of the limit plate 3 and pierces the surface of the wire and contacts the copper core inside the wire. Each wire contacts four contact pieces 4-1 to ensure a large contact area, thereby stabilizing the connection between the wire and the contact piece 4-1. The other side of the pressing plate 4 close to the bolt 5 is directly mechanically connected to the end of the threaded section of the bolt 5, so that the pressing plate 4 can change its position as the end of the threaded end of the bolt 5 is tightened or unscrewed.

[0034] like Figure 6 , 7 As shown, the bolt 5 can be bent in the middle section and is made of insulating material. The upper and lower parts of the bolt 5 are connected in a hinged manner. The screw in the upper part of the bolt 5 is a smooth rod 5-1 and the end is threadedly connected with a hand-rubbing wheel. The lower part of the bolt 5 is a threaded screw, which can be screwed in and out of the screw hole on the side wall of the incoming cabinet 1. The bolt 5 can be tightened or unscrewed using the hand-rubbing wheel at the end of the smooth rod section, or it can be bent in the middle section and the screw of the bent part can be rotated using the lever principle to tighten and unscrew the threaded section screw in the screw hole, which is more labor-saving and convenient.

[0035] like Figure 8 As shown, a buckle 6 is provided on the surface of the incoming cabinet 1 outside the threaded hole on the side wall of the incoming cabinet 1. The buckle 6 is used to fix the upper part of the light rod of the bolt. After the bolt 5 is tightened, the upper part of the light rod 5-1 can be directly buckled into the buckle 6 to prevent the bolt 5 from loosening and causing the wire to loosen, ensuring safe and reliable contact without loosening.

[0036] When the stripping-free photovoltaic DC circuit breaker device is used, the wire connected to the circuit breaker is passed through the wire groove on the wire plate 2, and the limit plate 3 is located between the wire plate 2 and the pressure plate 4. The contact wire piece 4-1 on the pressure plate 4 passes through the rectangular groove on the limit plate 3 and then pierces the surface of the wire and contacts the copper core inside the wire, so that each wire contacts four contact wire pieces to ensure a larger contact area, thereby stabilizing the connection between the wire and the contact wire piece 4-1. The pressure plate 4 is located between the limit plate 3 and the bolt 5, and the bolt 5 can adjust the degree of downward pressure of the pressure plate 4. The mechanical connection between the bolt 5 and the pressure plate 4 can be conveniently and labor-savingly adjusted by tightening or unscrewing the hand-rubbing wheel threaded at the end of the upper part of the light rod 5-1 of the bolt 5. After the bolt 5 is tightened, the upper part of the light rod 5-1 is buckled into the buckle 6 for storage.

[0037] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the present invention.

Claims

1. A stripping-free photovoltaic DC circuit breaker device, characterized in that: Both sides of the leakage circuit breaker are integrally formed with mutually penetrating incoming line cabinets (1), and a conductor plate (2), a limiting plate (3) and a pressing plate (4) are sequentially inserted in the incoming line cabinet (1). The limiting plate (3) is located between the conductor plate (2) and the pressing plate (4). The conductor plate (2) is evenly provided with a plurality of conductor grooves for placing conductors, the limiting plate (3) is evenly provided with array-type rectangular grooves, and the pressing plate (4) is provided with a contact piece (4-1) corresponding to the position of the rectangular groove on the limiting plate (3). The rectangular groove on the limiting plate (3) is used to allow the contact piece (4-1) on the pressing plate (4) to pass through, and the limiting plate (3) is used to limit the lower limit of the pressing plate (4) to prevent the pressing plate (4) from being pressed too downward and damaging the contact piece (4-1).

2. The stripping-free photovoltaic DC circuit breaker device according to claim 1 is characterized in that: A threaded hole is provided on the side wall of the incoming line cabinet (1), and a bolt (5) for pressing the pressure plate (4) is threadedly connected in the threaded hole.

3. The stripping-free photovoltaic DC circuit breaker device according to claim 2 is characterized in that: The upper and lower parts of the bolt (5) are connected in a hinged manner. The screw rod of the upper part of the bolt (5) is a smooth rod (5-1) and the end is threadedly connected to a hand-rubbing wheel. The lower part of the bolt (5) is a screw rod with threads. The bolt (5) can be screwed in and out of the screw hole on the side wall of the incoming cabinet (1). The bolt (5) is tightened or screwed out by the hand-rubbing wheel at the end of the smooth rod section.

4. The stripping-free photovoltaic DC circuit breaker device according to claim 1 is characterized in that: The contact wire sheet (4-1) is a sharp three-pronged copper sheet, the surface of which is plated with a nickel layer for resisting oxidation and preventing rust, and a gold layer for enhancing conduction and stabilizing transmission.

5. The stripping-free photovoltaic DC circuit breaker device according to claim 1, characterized in that: The conductor grooves on the conductor plate (2) are three grooves, the rectangular grooves on the limit plate (3) are a 3×3 array, and the contact wire pieces (4-1) on the pressure plate (4) are a 3×3 array corresponding to the positions of the rectangular grooves on the limit plate (3).

6. The stripping-free photovoltaic DC circuit breaker device according to claim 1, characterized in that: The conductor plate (2) has four conductor grooves, the limiting plate (3) has rectangular grooves in a 4×4 array, and the contact wire pieces (4-1) on the pressure plate (4) have a 4×4 array corresponding to the positions of the rectangular grooves on the limiting plate (3).

7. The stripping-free photovoltaic DC circuit breaker device according to claim 3 is characterized in that: A buckle (6) is provided on the surface of the incoming cabinet (1) outside the threaded hole on the side wall of the incoming cabinet (1), and the buckle (6) is used to fix the bare rod (5-1) on the upper part of the bolt.

8. The stripping-free photovoltaic DC circuit breaker device according to claim 1, characterized in that: The incoming line cabinet (1) is a hollow rectangular cabinet used for accommodating internal structural components of the circuit breaker.

9. The stripping-free photovoltaic DC circuit breaker device according to claim 2, characterized in that: The conductor plate (2) is made of insulating material and is used to prevent the conductors from accidentally touching each other.

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