Photovoltaic inverter terminal voltage detection clamp

Abstract

This utility model belongs to the field of photovoltaic inverter withstand voltage testing, specifically a photovoltaic inverter terminal withstand voltage testing fixture, including two spring clips with a wire fixedly connected between them. A pushing component is provided inside each spring clip, and a supporting component is provided on the surface of each spring clip. The pushing component includes a hollow tube fixedly installed on the bottom wall of the spring clip. After the spring clips clamp onto the surface of the connecting terminal, a sliding rod can be pushed out of the hollow tube, thereby pushing the top of the spring clip away from the bottom. This allows for a more stable clamping of the connecting terminal on the side of the spring clip. Furthermore, the internal threaded tube can be rotated to rotate the supporting block, which supports the side of the spring clip away from the connecting terminal, preventing the side of the spring clip away from the connecting terminal from descending, further ensuring the stability of the spring clip clamping the connecting terminal.

Description

Technical Field

[0001] This utility model relates to the field of withstand voltage testing of photovoltaic inverters, specifically a withstand voltage testing fixture for photovoltaic inverter terminals. Background Technology

[0002] In the production and testing of photovoltaic inverters, the withstand voltage performance of the terminals is one of the key indicators to ensure the safe operation of the equipment. Currently, when conducting withstand voltage tests on photovoltaic inverter terminals, the industry typically requires using clamps to fix the terminals to ensure the stability and accuracy of the testing process. After that, the clamps are connected to the positive terminal of the withstand voltage tester, and then the withstand voltage tester is grounded to perform the withstand voltage test. Currently, most clamps used to hold photovoltaic inverter terminals employ spring clip structures, which use the spring force to clamp the terminals. However, in practical applications, the end of the spring clip that connects to the terminal is usually tilted upwards. This tilted end will then lean downwards under gravity, causing the end holding the terminal to also tilt, resulting in loose clamping. Even worse, during testing, the spring clip may detach from the bolt terminal. This detachment not only affects the normal operation of withstand voltage testing, leading to inaccurate test data, but may also cause displacement during high-voltage testing due to the terminal not being effectively secured, thus creating safety hazards. Therefore, to address these issues, a withstand voltage testing clamp for photovoltaic inverter terminals is proposed. Utility Model Content

[0003] To overcome the shortcomings of existing technologies and avoid the problem of poor detection accuracy caused by the loosening of the clamp after holding the connection terminal, this utility model proposes a photovoltaic inverter terminal withstand voltage test clamp.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a photovoltaic inverter terminal withstand voltage test clamp, including two spring clamps, a wire fixedly connected between the two spring clamps, a pushing component is provided inside the spring clamp, and a supporting component is provided on the surface of the spring clamp; The pushing assembly includes a hollow tube fixedly installed on the bottom wall of the spring clip. A sliding rod is slidably connected inside the hollow tube. A vertical groove is formed on the surface of the sliding rod. A screw is threaded inside the hollow tube near the vertical groove. A push block is rotatably connected to the end of the screw near the vertical groove. A slider is hinged to the top of the sliding rod. Protrusions are fixedly connected to both ends of the slider. A guide rail is fixedly connected to the top wall of the spring clip.

[0005] Preferably, the top of the sliding rod extends to the outside of the hollow tube, and the angle between the two spring clips is adjusted by adjusting the length of the sliding rod extending out of the hollow tube.

[0006] Preferably, the screw penetrates the inner and outer walls of the hollow tube, and the push block and the vertical groove are adapted to each other and make contact. The rotatable screw pushes the push block against the inner wall of the vertical groove. At this time, the position of the sliding rod extending out of the hollow tube is limited by the friction between the push block and the vertical groove.

[0007] Preferably, the guide rail has inner grooves on both the front and rear sides that are adapted to and slidably connected to the protrusions. The slider is slidably connected to the bottom of the guide rail. The protrusions are inside the inner grooves so that when the slider moves, it can drive the guide rail to move accordingly, thereby pushing the top of the spring clip to rotate by an angle.

[0008] Preferably, the support assembly includes a fixing plate fixedly installed in the middle of the rear end of the spring clip. The fixing plate has a groove inside, and a slot is formed inside the groove. An internally threaded tube is rotatably connected inside the groove. An externally threaded rod is threadedly connected inside the internally threaded tube. A support block is rotatably connected to the end of the externally threaded rod away from the internally threaded tube.

[0009] Preferably, the slot extends through the upper and lower sides of the fixing plate, and the support block is fitted into the slot, so that the support block does not occupy a large external space.

[0010] Preferably, the support block is made of ceramic material, and the end of the support block away from the external threaded rod can be made on the surface of the photovoltaic inverter. The support block itself is insulated to avoid short circuit between the spring clip and the photovoltaic inverter.

[0011] Preferably, the two spring clips are electrically connected by a wire, and the spring clips are made of copper alloy.

[0012] The advantages of this utility model are: After the spring clip is clamped on the surface of the connecting terminal, the sliding rod can be pushed out of the hollow tube, thereby pushing the top of the spring clip away from the bottom. In other words, the side of the spring clip that clamps the connecting terminal can clamp the connecting terminal more stably. In addition, the rotatable internal threaded tube drives the support block to rotate. At this time, the support block supports the side of the spring clip away from the connecting terminal, so that the side of the spring clip away from the connecting terminal will not fall, further ensuring the stability of the spring clip holding the connecting terminal. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the spring clip structure of this utility model; Figure 3 This is a schematic cross-sectional view of the hollow tube structure of this utility model; Figure 4 This is a schematic diagram of the support component structure of this utility model; Figure 5 This is a schematic diagram of the internally threaded tube of this utility model after rotation.

[0015] In the diagram: 1. Spring clip; 2. Wire; 3. Push assembly; 31. Hollow tube; 32. Sliding rod; 33. Vertical groove; 34. Screw; 35. Push block; 36. Slider; 37. Protrusion; 38. Guide rail; 4. Support assembly; 41. Fixing plate; 42. Groove; 43. Slot; 44. Internally threaded tube; 45. Externally threaded rod; 46. Support block. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail. This application discloses a withstand voltage testing fixture for photovoltaic inverter terminals. (Refer to...) Figure 1 A photovoltaic inverter terminal withstand voltage test fixture includes two spring clips 1, a wire 2 is fixedly connected between the two spring clips 1, the two spring clips 1 are electrically connected through the wire 2, the spring clips 1 are made of copper alloy, a pushing component 3 is provided inside the spring clips 1, and a supporting component 4 is provided on the surface of the spring clips 1. Reference Figure 2 - Figure 3The pushing assembly 3 includes a hollow tube 31 fixedly installed on the bottom wall of the spring clip 1. A sliding rod 32 is slidably connected inside the hollow tube 31. The top of the sliding rod 32 extends to the outside of the hollow tube 31. Adjusting the length of the sliding rod 32 extending out of the hollow tube 31 adjusts the angle between the two spring clips 1. A vertical groove 33 is formed on the surface of the sliding rod 32. A screw 34 is threadedly connected inside the hollow tube 31 near the vertical groove 33. A push block 35 is rotatably connected to the end of the screw 34 near the vertical groove 33. The screw 34 passes through the inner and outer walls of the hollow tube 31. The push block 35 is adapted to and in contact with the vertical groove 33. The screw 34 can be rotated to push the push block. 35 abuts against the inner wall of the vertical groove 33. At this time, the position of the sliding rod 32 extending out of the hollow tube 31 is limited by the friction between the push block 35 and the vertical groove 33. The top of the sliding rod 32 is hinged to a slider 36. Both the front and rear ends of the slider 36 are fixedly connected to protrusions 37. The top wall of the spring clip 1 is fixedly connected to a guide rail 38. The front and rear sides of the guide rail 38 are provided with inner grooves that are adapted to and slidably connected to the protrusions 37. The slider 36 is slidably connected to the inside of the bottom end of the guide rail 38. The protrusions 37 are inside the inner grooves so that when the slider 36 moves, it can drive the guide rail 38 to move accordingly, thereby pushing the top of the spring clip 1 to rotate.

[0018] Reference Figure 4 - Figure 5 The support assembly 4 includes a fixing plate 41 fixedly installed in the middle of the rear end of the spring clip 1. The fixing plate 41 has a groove 42 inside, and a slot 43 is formed inside the groove 42. An internally threaded tube 44 is rotatably connected inside the groove 42. An externally threaded rod 45 is threaded inside the internally threaded tube 44. A support block 46 is rotatably connected to the end of the externally threaded rod 45 away from the internally threaded tube 44. The slot 43 passes through the upper and lower sides of the fixing plate 41. The support block 46 is fitted and snapped into the inside of the slot 43. At this time, the support block 46 does not occupy a large external space. The support block 46 is made of ceramic material. The end of the support block 46 away from the externally threaded rod 45 can be made on the surface of the photovoltaic inverter. The support block 46 is insulated to avoid short circuit between the spring clip 1 and the photovoltaic inverter.

[0019] Working principle: The operator lays a spring clip 1 horizontally and clamps the connection terminal of the photovoltaic inverter. At this time, the sliding rod 32 can be pushed to move outwards from the hollow tube 31. The sliding rod 32 will push the slider 36 to move away from the hollow tube 31. Since the sliding rod 32 can only move along the axis of the hollow tube 31, the slider 36 will push the inclined protrusion 37 upwards. The protrusion 37 will then cause the side of the spring clip 1 away from the connection terminal to move upwards. In other words, the side of the spring clip 1 closest to the connection terminal moves towards the connection terminal. When the spring clip 1 is close to the upper and lower ends of the connecting terminal, it can clamp the connecting terminal more stably. At this time, when the sliding rod 32 is moved, it will encounter obvious resistance. At this time, the sliding rod 32 is stopped. Then the operator rotates the screw 34. The screw 34 pushes the push block 35 into the hollow tube 31 until the push block 35 abuts against the inner wall of the vertical groove 33. At this time, the position of the vertical groove 33 is limited by the friction between the push block 35 and the vertical groove 33, thereby completing the limitation of the position of the spring clip 1. That is, at this time, the spring clip 1 stably clamps the connecting terminal.

[0020] The operator then rotates the internal threaded tube 44. Since the spring clip 1 is horizontal, the internal threaded tube 44 is located below the spring clip 1. Rotating the internal threaded tube 44 will cause the external threaded rod 45 and the support block 46 to rotate accordingly. During this process, the operator pulls the external threaded rod 45 to rotate. The external threaded rod 45 will move inside the internal threaded tube 44. The length of the external threaded rod 45 extending out of the internal threaded tube 44 is adjusted according to the distance between the end of the support block 46 away from the external threaded rod 45 and the photovoltaic inverter. When the external threaded rod 45 rotates to be perpendicular to the fixing plate 41, the end of the support block 46 away from the external threaded rod 45 can be made to just abut against the surface of the photovoltaic inverter. At this time, one end of the spring clip 1 is clamped on the surface of the connection terminal, and the other end of the spring clip 1 is supported by the combination of the internal threaded tube 44, the external threaded rod 45 and the support block 46. Therefore, the spring clip 1 will not tilt due to gravity, and thus the spring clip 1 can be clamped on the surface of the connection terminal for a long time.

[0021] The operator then clamps another spring clip 1 onto the positive terminal of the withstand voltage detector. At this time, the negative terminal of the withstand voltage detector is connected to the grounding terminal of the photovoltaic inverter. Then, the withstand voltage detector is turned on to perform a withstand voltage test on the connection terminal.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A withstand voltage testing fixture for photovoltaic inverter terminals, characterized in that: It includes two spring clips (1), a wire (2) is fixedly connected between the two spring clips (1), a pushing component (3) is provided inside the spring clip (1), and a supporting component (4) is provided on the surface of the spring clip (1). The pushing assembly (3) includes a hollow tube (31) fixedly installed on the bottom wall of the spring clip (1). A sliding rod (32) is slidably connected inside the hollow tube (31). A vertical groove (33) is opened on the surface of the sliding rod (32). A screw (34) is threadedly connected inside the hollow tube (31) near the vertical groove (33). A push block (35) is rotatably connected to one end of the screw (34) near the vertical groove (33). A slider (36) is hinged to the top of the sliding rod (32). A protrusion (37) is fixedly connected to both the front and rear ends of the slider (36). A guide rail (38) is fixedly connected to the top wall of the spring clip (1).

2. The photovoltaic inverter terminal withstand voltage testing fixture according to claim 1, characterized in that: The top of the sliding rod (32) extends to the outside of the hollow tube (31).

3. The photovoltaic inverter terminal withstand voltage testing fixture according to claim 1, characterized in that: The screw (34) penetrates the inner and outer walls of the hollow tube (31), and the push block (35) and the vertical groove (33) are adapted to each other in contact.

4. The photovoltaic inverter terminal withstand voltage testing fixture according to claim 1, characterized in that: The guide rail (38) has inner grooves on both the front and rear sides that are adapted to slide and connect with the protrusion (37), and the slider (36) is slidably connected to the inside of the bottom end of the guide rail (38).

5. A photovoltaic inverter terminal withstand voltage testing fixture according to claim 1, characterized in that: The support assembly (4) includes a fixing plate (41) fixedly installed in the middle of the rear end of the spring clip (1). The fixing plate (41) has a groove (42) inside. The fixing plate (41) has a slot (43) inside the groove (42). An internal threaded tube (44) is rotatably connected inside the groove (42). An external threaded rod (45) is threaded inside the internal threaded tube (44). A support block (46) is rotatably connected to one end of the external threaded rod (45) away from the internal threaded tube (44).

6. A photovoltaic inverter terminal withstand voltage testing fixture according to claim 5, characterized in that: The slot (43) extends through the upper and lower sides of the fixing plate (41), and the support block (46) is adapted to be snapped into the inside of the slot (43).

7. A photovoltaic inverter terminal withstand voltage testing fixture according to claim 5, characterized in that: The support block (46) is made of ceramic material.

8. A photovoltaic inverter terminal withstand voltage testing fixture according to claim 1, characterized in that: The two spring clips (1) are electrically connected by a wire (2), and the spring clips (1) are made of copper alloy.

Images