Photovoltaic real-time online insulation detection device

Abstract

The utility model provides a photovoltaic real-time online insulation detection device which comprises a storage box, a take-up assembly is arranged in the storage box, a containing groove is formed in the top end of the storage box, a sealing cover is hinged to the position, located on one side of the containing groove, of the top end of the storage box, and a limiting assembly is arranged in the containing groove. The beneficial effects of the utility model are that when the insulation detector is used, a user holds and pulls a first pull rod in the limiting assembly towards the direction of the insulation detector, and the first wire clamp and the second wire clamp can loosen the clamping of a connecting wire in cooperation with a limiting block, a limiting box, a telescopic rod, a first reset spring, a clamping block and a second reset spring; after the connecting line is connected, a second pull rod is pulled, a first line clamp and a second line clamp can clamp the connecting line in cooperation with a pressing plate, a third reset spring and a fixing plate, due to the fact that a limiting assembly is arranged in a containing groove, mistaken touch can be avoided, and the connecting line can be protected through a sealing cover when the device is idle.

Description

Technical Field

[0001] The utility model relates to a photovoltaic real-time online insulation detection device, belonging to the field of photovoltaic inverter testing. Background Technique

[0002] A photovoltaic inverter can convert the variable DC voltage generated by a photovoltaic solar panel into AC power with the mains frequency. After the photovoltaic inverter is installed, it is necessary to detect the insulation impedance of the photovoltaic inverter, so an insulation detection device is required.

[0003] In the prior art, during the use of the detection device on the market, it is necessary to connect the detection device to the photovoltaic inverter through a connecting wire. However, when the connecting wire is long or there are many connecting wires, it is easy for the connecting wires to knot, making the insulation impedance detection operation of the photovoltaic inverter difficult. Some detection devices, when in use, loosen the limit on the connecting wire by pressing a pressing block and squeezing a spring to make the fixing block and the pushing block move away from each other, and cooperate with the wire winding rod and the coil spring in the storage box to adjust the length of the connecting wire. However, this method requires continuous pressing of the block during the process of adjusting the length of the connecting wire, which is likely to cause hand fatigue. Moreover, since the pressing block extends out of the storage box, it is also easy to be accidentally touched, causing the connecting wire to be retracted into the storage box under the action of the coil spring, and further causing the plug to separate from the photovoltaic inverter, thus affecting the detection efficiency. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a photovoltaic real-time online insulation detection device to solve the problem that some detection devices in the above background technology loosen the limit on the connecting wire by pressing a pressing block and squeezing a spring to make the fixing block and the pushing block move away from each other, and cooperate with the wire winding rod and the coil spring in the storage box to adjust the length of the connecting wire. However, this method requires continuous pressing of the block during the process of adjusting the length of the connecting wire, which is likely to cause hand fatigue. Moreover, since the pressing block extends out of the storage box, it is also easy to be accidentally touched, causing the connecting wire to be retracted into the storage box under the action of the coil spring, and further causing the plug to separate from the photovoltaic inverter, thus affecting the detection efficiency.

[0005] To achieve the above purpose, the utility model is realized by the following technical solutions: A photovoltaic real-time online insulation detection device includes a storage box. A wire winding component is arranged in the storage box. A placing groove is opened at the top end of the storage box. A cover is hinged to the top end of the storage box on one side of the placing groove. A limiting component is arranged in the placing groove. An insulation detector is fixedly connected to one side of the storage box.

[0006] The wire winding assembly includes a first wire winding rod rotatably connected to the inner wall of the storage box. Below the first wire winding rod, a second wire winding rod is rotatably connected to the inner wall of the storage box. Below the second wire winding rod, a third wire winding rod is rotatably connected to the inner wall of the storage box. Protective shells are rotatably connected to the surfaces of the first wire winding rod, the second wire winding rod, and the third wire winding rod. The protective shells are fixedly connected to the storage box. A torsion spring is arranged inside the protective shell. The torsion spring has an outer end and an inner end. The outer end is fixedly connected to the protective shell, and the inner end is fixedly connected to the first wire winding rod, the inner end is fixedly connected to the second wire winding rod, and the inner end is fixedly connected to the third wire winding rod respectively.

[0007] Further, the limiting assembly includes a first wire clamp fixedly connected to the inner wall of the placement groove. A second wire clamp is movably connected to one side of the first wire clamp. The top of the second wire clamp is fixedly connected to a first pull rod. A telescopic rod is fixedly connected to the side of the second wire clamp away from the first wire clamp. The telescopic rod is fixedly connected to a limiting box on the side away from the second wire clamp. A first return spring is sleeved on the surface of the telescopic rod. The first return spring is fixedly connected to the second wire clamp and the limiting box respectively. A limiting block is slidably connected inside the limiting box. A second return spring is fixedly connected to the inner wall of the limiting block. The other end of the second return spring is fixedly connected to a clamping block. A pressing plate is slidably connected to the side of the limiting block inside the limiting box. A third return spring is fixedly connected to the top of the side of the pressing plate close to the clamping block. The other end of the third return spring is fixedly connected to a fixing plate. The fixing plate is fixedly connected to the limiting box. A second pull rod is fixedly connected to the top of the side of the pressing plate close to the clamping block inside the third return spring.

[0008] Further, the inner wall of the placement groove is stepped, and a sealing ring is fixedly connected to the inner wall of the placement groove.

[0009] Further, the length of the first wire winding rod is less than the length of the second wire winding rod, and the length of the second wire winding rod is less than the length of the third wire winding rod.

[0010] Further, arc-shaped grooves are formed in both the first wire clamp and the second wire clamp, and anti-slip pads are fixedly connected to the inner walls of the arc-shaped grooves.

[0011] Advantages of the utility model: During use, the user holds and pulls the first pull rod in the limit assembly towards the insulation detector. In cooperation with the limit block, limit box, telescopic rod, first return spring, clamping block and second return spring, the first wire clamp and the second wire clamp can be made to loosen the clamping of the connecting wire. Then, according to actual needs, the connecting wire is adjusted so that the part extending from the top of the storage box can be connected to the photovoltaic inverter. At this time, since one end of the connecting wire located at the top of the storage box elongates, it will drive the first wire winding rod, the second wire winding rod and the third wire winding rod in the wire winding assembly connected thereto to rotate and cause the coil spring to generate elastic force. After the connecting wire is connected, the second pull rod is pulled. In cooperation with the pressing plate, the third return spring and the fixing plate, the first wire clamp and the second wire clamp can be made to clamp the connecting wire. Next, the insulation detector can be used to detect the insulation impedance of the photovoltaic inverter. After the detection is completed, the restriction on the connecting wire is released through the above steps. Due to the elastic force of the coil spring, the connecting wire can be automatically wound up. Since the limit assembly is arranged in the storage groove, accidental touch can be avoided. When the device is idle, the connecting wire can be protected by the cover. Description of the Drawings

[0012] By reading the following detailed description of the non-restrictive embodiments with reference to the accompanying drawings, other features, objects and advantages of the present utility model will become more apparent:

[0013] Figure 1 Schematic diagram of the overall structure of a photovoltaic real-time online insulation detection device of the present utility model;

[0014] Figure 2 Schematic diagram of the internal structure of a photovoltaic real-time online insulation detection device of the present utility model;

[0015] Figure 3 Schematic diagram of the side sectional structure of the protective shell of a photovoltaic real-time online insulation detection device of the present utility model;

[0016] Figure 4 Schematic diagram of the limit assembly structure of a photovoltaic real-time online insulation detection device of the present utility model.

[0017] In the figure: 1, storage box; 2, wire winding assembly; 201, first wire winding rod; 202, second wire winding rod; 203, third wire winding rod; 204, protective shell; 205, coil spring; 3, storage groove; 4, cover; 5, limit assembly; 501, first wire clamp; 502, second wire clamp; 503, first pull rod; 504, telescopic rod; 505, limit box; 506, first return spring; 507, limit block; 508, second return spring; 509, clamping block; 510, pressing plate; 511, third return spring; 512, fixing plate; 513, second pull rod; 6, insulation detector; 7, sealing ring; 8, anti-slip pad. Detailed Embodiment

[0018] To make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] Please refer to Figure 1 , Figure 2 and Figure 4 , the present utility model provides a technical solution: a photovoltaic real-time online insulation detection device, including a storage box 1, a wire winding assembly 2 is arranged in the storage box 1, a placing groove 3 is opened at the top of the storage box 1, a cover 4 is hinged to one side of the top of the storage box 1 located at the placing groove 3, a limiting assembly 5 is arranged in the placing groove 3, and an insulation detector 6 is fixedly connected to one side of the storage box 1;

[0020] The wire winding assembly 2 includes a first wire winding rod 201 rotatably connected to the inner wall of the storage box 1, a second wire winding rod 202 rotatably connected to the inner wall of the storage box 1 below the first wire winding rod 201, and a third wire winding rod 203 rotatably connected to the inner wall of the storage box 1 below the second wire winding rod 202. Protective shells 204 are rotatably connected to the surfaces of the first wire winding rod 201, the second wire winding rod 202 and the third wire winding rod 203, and the protective shells 204 are fixedly connected to the storage box 1. A torsion spring 205 is arranged in the protective shell 204. The torsion spring 205 has an outer end and an inner end. The outer end is fixedly connected to the protective shell 204, and the inner end is fixedly connected to the first wire winding rod 201, the inner end is fixedly connected to the second wire winding rod 202, and the inner end is fixedly connected to the third wire winding rod 203.

[0021] When in use, the user holds and pulls the first pull rod 503 in the limiting assembly 5 in the direction of the insulation detector 6. With the cooperation of the limiting block 507, the limiting box 505, the telescopic rod 504, the first return spring 506, the clamping block 509 and the second return spring 508, the first wire clamp 501 and the second wire clamp 502 can be made to loosen the clamping of the connecting wire. Then, according to actual needs, the connecting wire is adjusted so that the part extending out of the top of the storage box 1 can be connected to the photovoltaic inverter. At this time, since one end of the connecting wire located at the top of the storage box 1 elongates, it will drive the first wire winding rod 201, the second wire winding rod 202 and the third wire winding rod 203 in the wire winding assembly 2 connected thereto to rotate and cause the torsion spring 205 to generate elastic force. After the connecting wire is connected, the second pull rod 513 is pulled. With the cooperation of the pressing plate 510, the third return spring 511 and the fixing plate 512, the first wire clamp 501 and the second wire clamp 502 can be made to clamp the connecting wire. Next, the photovoltaic inverter can be subjected to insulation impedance detection through the insulation detector 6. After the detection is completed, the restriction on the connecting wire is released through the above steps. Due to the elastic force of the torsion spring 205, the connecting wire can be automatically wound up. Since the limiting assembly 5 is arranged in the placing groove 3, it can avoid accidental touch. When the device is idle, the cover 4 can provide protection for the connecting wire.

[0022] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the limiting component 5 includes a first wire clamp 501 fixedly connected to the inner wall of the storage groove 3. A second wire clamp 502 is movably connected to one side of the first wire clamp 501. A first pull rod 503 is fixedly connected to the top end of the second wire clamp 502. A telescopic rod 504 is fixedly connected to the side of the second wire clamp 502 away from the first wire clamp 501. A limiting box 505 is fixedly connected to the side of the telescopic rod 504 away from the second wire clamp 502. A first return spring 506 is sleeved on the surface of the telescopic rod 504. The first return spring 506 is fixedly connected between the second wire clamp 502 and the limiting box 505. A limiting block 507 is slidably connected in the limiting box 505. A second return spring 508 is fixedly connected to the inner wall of the limiting block 507. The other end of the second return spring 508 is fixedly connected to a clamping block 509. A pressing plate 510 is slidably connected in the limiting box 505 on one side of the limiting block 507. A third return spring 511 is fixedly connected to the top of the side of the pressing plate 510 close to the clamping block 509. The other end of the third return spring 511 is fixedly connected to a fixing plate 512. The fixing plate 512 is fixedly connected to the limiting box 505. A second pull rod 513 is fixedly connected to the top of the side of the pressing plate 510 close to the clamping block 509 and is located inside the third return spring 511. The user holds and pulls the first pull rod 503 in the direction of the insulation detector 6, thereby driving the limiting block 507 connected to the second wire clamp 502 to slide in the same direction along the inner wall of the limiting box 505 until the clamping block 509 snaps into the area on one side inside the limiting box 505 under the action of the second return spring 508, so that the first wire clamp 501 and the second wire clamp 502 can release the clamping of the connecting wire. During this process, the telescopic rod 504 and the first return spring 506 will contract. Then, adjust the connecting wire according to actual needs so that the part extending out of the top of the storage box 1 can be connected to the photovoltaic inverter. After the connecting wire is connected, pull the second pull rod 513 in the direction of the fixing plate 512, thereby driving the pressing plate 510 to slide in the same direction along the inner wall of the limiting box 505 and compress the third return spring 511, and then cooperate with the second return spring 508 to push the clamping block 509 back into the limiting block 507. At this time, due to the removal of the restriction of the clamping block 509, the first return spring 506 will reset and drive the telescopic rod 504 to extend, thereby driving the second wire clamp 502 to move towards the connecting wire to limit the connecting wire. Then release the second pull rod 513, and the third return spring 511 will reset and make the pressing plate 510 return to its original position for subsequent use.

[0023] The inner wall of the storage groove 3 is in a stepped shape, and a sealing ring 7 is fixedly connected to the inner wall of the storage groove 3. The inner wall of the storage groove 3 being in a stepped shape and having a sealing ring 7 fixedly connected to its inner wall can improve the sealing performance between the cover 4 and the storage groove 3.

[0024] The length of the first wire take-up rod 201 is less than that of the second wire take-up rod 202, and the length of the second wire take-up rod 202 is less than that of the third wire take-up rod 203. The fact that the length of the first wire take-up rod 201 is less than that of the second wire take-up rod 202 and the length of the second wire take-up rod 202 is less than that of the third wire take-up rod 203 ensures that the second wire take-up rod 202 and the third wire take-up rod 203 do not hinder the movement of the connecting wire.

[0025] Arc-shaped grooves are formed in both the first wire clamp 501 and the second wire clamp 502, and an anti-slip pad 8 is fixedly connected to the inner wall of the arc-shaped groove. By providing the anti-slip pad 8, the friction force between the first wire clamp 501 and the connecting wire and between the second wire clamp 502 and the connecting wire can be increased, thereby further improving the limiting effect on the connecting wire.

[0026] Specific implementation method: When in use, the user holds and pulls the first pull rod 503 towards the direction of the insulation detector 6, thereby driving the limiting block 507 connected to the second wire clamp 502 to slide along the inner wall of the limiting box 505 in the same direction until the latch 509 is clamped into the area on one side inside the limiting box 505 under the action of the second return spring 508, so that the first wire clamp 501 and the second wire clamp 502 can release the clamping of the connecting wire. During this process, the telescopic rod 504 and the first return spring 506 will contract. Then, adjust the connecting wire according to actual needs so that the part extending out of the top of the storage box 1 can be connected to the photovoltaic inverter. At this time, since one end of the connecting wire located at the top of the storage box 1 elongates, it will drive the first wire take-up rod 201, the second wire take-up rod 202 or the third wire take-up rod 203 connected thereto to rotate, thereby causing the torsion spring 205 to generate elastic force. After the connection of the connecting wire is completed, pull the second pull rod 513 towards the direction of the fixing plate 512, thereby driving the pressing plate 510 to slide along the inner wall of the limiting box 505 in the same direction and compress the third return spring 511, and then cooperate with the second return spring 508 to push the latch 509 back into the limiting block 507. At this time, due to the removal of the restriction of the latch 509, the first return spring 506 will reset and drive the telescopic rod 504 to extend, thereby driving the second wire clamp 502 to move towards the connecting wire to limit the connecting wire. Then release the second pull rod 513, and the third return spring 511 will reset and make the pressing plate 510 return to its original position for subsequent use. Next, the photovoltaic inverter can be subjected to insulation impedance detection through the insulation detector 6. After the detection is completed, release the restriction on the connecting wire through the above steps. Due to the elastic force of the torsion spring 205, the first wire take-up rod 201, the second wire take-up rod 202 or the third wire take-up rod 203 will automatically rotate to wind up the connecting wire. Since the limiting component 5 is arranged in the storage groove 3, accidental touch can be avoided, and the connecting wire can be protected by the cover 4 when the device is idle.

[0027] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A photovoltaic real-time online insulation detection device, characterized in that: It includes a storage box (1), a wire winding component (2) is arranged in the storage box (1), a placing groove (3) is opened at the top of the storage box (1), a cover (4) is hinged to one side of the placing groove (3) at the top of the storage box (1), a limiting component (5) is arranged in the placing groove (3), and an insulation detector (6) is fixedly connected to one side of the storage box (1). The wire winding component (2) includes a first wire winding rod (201) rotatably connected to the inner wall of the storage box (1), a second wire winding rod (202) is rotatably connected to the inner wall of the storage box (1) below the first wire winding rod (201), a third wire winding rod (203) is rotatably connected to the inner wall of the storage box (1) below the second wire winding rod (202), protective shells (204) are rotatably connected to the surfaces of the first wire winding rod (201), the second wire winding rod (202) and the third wire winding rod (203), the protective shells (204) are fixedly connected to the storage box (1), a torsion spring (205) is arranged in the protective shells (204), the torsion spring (205) has an outer end and an inner end, the outer end is fixedly connected to the protective shell (204), and the inner end is fixedly connected to the first wire winding rod (201), the inner end is fixedly connected to the second wire winding rod (202), and the inner end is fixedly connected to the third wire winding rod (203).

2. The photovoltaic real-time online insulation detection device according to claim 1, characterized in that: The limiting component (5) includes a first wire clamp (501) fixedly connected to the inner wall of the placing groove (3), a second wire clamp (502) is movably connected to one side of the first wire clamp (501), a first pull rod (503) is fixedly connected to the top of the second wire clamp (502), a telescopic rod (504) is fixedly connected to the side of the second wire clamp (502) away from the first wire clamp (501), a limiting box (505) is fixedly connected to the side of the telescopic rod (504) away from the second wire clamp (502), a first return spring (506) is sleeved on the surface of the telescopic rod (504), the first return spring (506) is fixedly connected to the second wire clamp (502) and the first return spring (506) is fixedly connected to the limiting box (505), a limiting block (507) is slidably connected in the limiting box (505), a second return spring (508) is fixedly connected to the inner wall of the limiting block (507), the other end of the second return spring (508) is fixedly connected to a clamping block (509), a pressing plate (510) is slidably connected to one side of the limiting block (507) in the limiting box (505), a third return spring (511) is fixedly connected to the top of the side of the pressing plate (510) close to the clamping block (509), the other end of the third return spring (511) is fixedly connected to a fixing plate (512), the fixing plate (512) is fixedly connected to the limiting box (505), and a second pull rod (513) is fixedly connected to the top of the side of the pressing plate (510) close to the clamping block (509) and is located in the third return spring (511).

3. The photovoltaic real-time on-line insulation detection device according to claim 1, characterized in that: The inner wall of the storage groove (3) is stepped, and a sealing ring (7) is fixedly connected to the inner wall of the storage groove (3).

4. A photovoltaic real-time online insulation detection device according to claim 1, characterized in that: The length of the first wire take-up rod (201) is less than the length of the second wire take-up rod (202), and the length of the second wire take-up rod (202) is less than the length of the third wire take-up rod (203).

5. The photovoltaic real-time online insulation detection device according to claim 2, wherein: Arc-shaped grooves are formed in both the first wire clamp (501) and the second wire clamp (502), and an anti-slip pad (8) is fixedly connected to the inner wall of the arc-shaped groove.

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