Grounding resistance testing device for lightning protection detection

Abstract

The utility model relates to the field of lightning protection detection, in particular to a grounding resistance testing device for lightning protection detection. Comprising a resistance measuring instrument, the upper surface of the resistance measuring instrument is electrically connected with a plurality of wires, the ends, away from the resistance measuring instrument, of two wires are electrically connected with probes, one side of the resistance measuring instrument is provided with an adjusting structure, the adjusting structure comprises a fixing plate, the fixing plate is fixedly connected with the resistance measuring instrument, and the side, away from the resistance measuring instrument, of the fixing plate is fixedly connected with a plurality of supporting plates; winding rods are fixedly connected to the upper surfaces of the multiple supporting plates, sliding grooves are formed in the surfaces of the supporting plates, and moving plates are slidably connected to the inner walls of the sliding grooves. The grounding resistance testing device for lightning protection detection provided by the utility model has the advantages that a plurality of wires are accommodated on the winding rod after the test operation at a designated place is completed, and the wound wires are limited by using the movable partition plate, so that the working efficiency of wire arrangement and accommodation is improved, and the next use is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of lightning protection detection, in particular to a grounding resistance testing device for lightning protection detection. Background Art

[0002] Lightning protection detection refers to preventive measures against overvoltage, overcurrent and electromagnetic pulse caused by lightning. The purpose is to reduce or avoid the harm of lightning-induced surge and voltage to buildings, equipment and personal safety. The grounding resistance testing device is a device used to test the grounding resistance of buildings to judge whether the lightning protection grounding resistance is less than 10 ohms.

[0003] In the prior art, when using a grounding resistance tester for lightning protection detection, two probes are first inserted into the ground 20 meters and 40 meters away from the grounding body respectively, and then several wires are connected to the resistance tester. The several wires are respectively connected to the E, C, and P terminals of the resistance tester. Then, the wire on the E terminal is connected to the grounding body, the wire on the C terminal is connected to the probe 40 meters away, and the wire on the P terminal is connected to the probe 20 meters away. After the wiring is completed, the megger is rotated evenly. When observing the deflection of the pointer, the fine-tuning dial is adjusted in time until the pointer is centered, and then the resistance value corresponding to the fine-tuning dial is read to judge whether the grounding resistance value meets the standard. However, the following problems will occur in this operation: the length of the wire is very long. Each time the resistance tester is used, the wire needs to be arranged and stored. The long wire is prone to be intertwined and wound during the storage process, which is time-consuming and laborious and affects the next use. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the disadvantage of low efficiency in wire arrangement and winding in the prior art.

[0005] To solve the above technical problems, the utility model provides a grounding resistance testing device for lightning protection detection, including: a resistance tester, several wires are electrically connected to the upper surface of the resistance tester, and one end of each of two of the wires far away from the resistance tester is electrically connected to a probe. An adjusting structure is arranged on one side of the resistance tester. The adjusting structure includes a fixing plate, the fixing plate is fixedly connected to the resistance tester, several supporting plates are fixedly connected to the side of the fixing plate far away from the resistance tester, winding rods are fixedly connected to the upper surfaces of the several supporting plates, a sliding groove is formed on the surface of the supporting plate, a moving plate is slidably connected to the inner wall of the sliding groove, two springs are fixedly connected to the side of the moving plate far away from the winding rod, and one end of the spring far away from the moving plate is fixedly connected to the fixing plate.

[0006] The effects achieved by the above components are: improving the working efficiency of wire arrangement and storage and facilitating the next use.

[0007] Preferably, a plurality of sliding rods are fixedly connected to the side of the fixed plate away from the resistance measuring instrument corresponding to the sliding groove, and the arc surface of the sliding rod is slidably connected to the moving plate.

[0008] The effect achieved by the above components is that the moving plate is further limited by the sliding rod, so that the moving plate moves more stably along the sliding groove.

[0009] Preferably, an anti-slip pad is fixedly connected to the side of the moving plate close to the winding rod, and the anti-slip pad is a rubber pad.

[0010] The effect achieved by the above components is that the friction on the surface of the moving plate is increased through the anti-slip pad, so that the limiting effect of the moving plate is better.

[0011] Preferably, an auxiliary frame is slidably connected to the upper surface of the fixed plate.

[0012] The effect achieved by the above components is that when the auxiliary frame is moved upward and away, after the moving plate approaches the fixed plate, the auxiliary frame is moved downward, and the moving plate is clamped by the auxiliary frame to temporarily limit the moving plate, which is convenient for the user to perform the winding operation.

[0013] Preferably, an auxiliary structure is provided on the side of the resistance measuring instrument away from the fixed plate. The auxiliary structure includes two positioning plates, the two positioning plates are fixedly connected to the resistance measuring instrument, two positioning grooves are formed on the surface of the positioning plate, an auxiliary rod is rotatably connected to the side of the resistance measuring instrument close to the positioning plate, a clamping plate is threadedly connected to the arc surface of the auxiliary rod, a round rod is fixedly connected to the side of the resistance measuring instrument close to the clamping plate, and the arc surface of the round rod is slidably connected to the clamping plate.

[0014] The effect achieved by the above components is that the probe is slid into the positioning grooves of the two positioning plates from the side, and the probe is squeezed and limited by the clamping plate, and the position of the real-time probe is fixed on the positioning plate, which is convenient for the user to store and manage the probe.

[0015] Preferably, a plurality of anti-slip protrusions are fixedly connected to the end of the auxiliary rod away from the resistance measuring instrument, and the plurality of anti-slip protrusions are evenly distributed on the arc surface of the auxiliary rod.

[0016] The effect achieved by the above components is that the friction of the operating end of the auxiliary rod is increased through the anti-slip protrusions, which is convenient for the user to rotate the auxiliary rod.

[0017] Preferably, two reserved grooves are formed on the side of the clamping plate close to the resistance measuring instrument corresponding to the positioning grooves, and the reserved grooves are arc-shaped grooves.

[0018] The effect achieved by the above components is that the inner wall of the reserved groove fits more fully with the arc surface of the probe, so that the limiting effect of the clamping plate on the probe is better.

[0019] Compared with the related technologies, a grounding resistance test device for lightning protection detection provided by the utility model has the following beneficial effects:

[0020] The utility model provides a grounding resistance test device for lightning protection detection. When using a grounding resistance tester for lightning protection detection, two probes are first inserted into the ground 20 meters and 40 meters away from the grounding body respectively, and then several wires are connected to the resistance tester. The several wires are respectively connected to the E, C, and P terminals of the resistance tester. Then, the wire on the E terminal is connected to the grounding body, the wire on the C terminal is connected to the probe 40 meters away, and the wire on the P terminal is connected to the probe 20 meters away. After the wiring is completed, the megger is shaken evenly. When observing the deflection of the pointer, the fine-tuning dial is adjusted in time until the pointer is centered, and then the resistance value corresponding to the fine-tuning dial is read to determine whether the grounding resistance value meets the standard. However, the following problems will occur in this operation. The length of the wires is very long. Each time the resistance tester is used, the wires need to be arranged and stored. The long wires are prone to being intertwined during the storage process, which is time-consuming and laborious and affects the next use. By setting an adjusting structure, after the test operation at a specified location is completed, the several wires are stored on the winding rod, and the moving partition is used to limit the wound wires, improving the working efficiency of wire arrangement and storage and facilitating the next use.

[0021] The user needs to store the two probes separately, which is inconvenient to manage and easy to lose. By setting an auxiliary structure, the probe is slid into the positioning grooves of the two positioning plates from the side, and the probe is squeezed and limited by the clamping plate, and the position of the real-time probe is fixed on the positioning plate, facilitating the user to store and manage the probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of a grounding resistance test device for lightning protection detection provided by the utility model;

[0023] Figure 2 is Figure 1 the schematic structural diagram of the adjusting structure shown in;

[0024] Figure 3 is Figure 2 the partial structural diagram of the adjusting structure shown in;

[0025] Figure 4 is Figure 1 the schematic structural diagram of the auxiliary structure shown in.

[0026] Reference numerals in the figure: 1, resistance measuring instrument; 2, wire; 3, probe; 4, adjusting structure; 41, fixing plate; 42, support plate; 43, winding rod; 44, chute; 45, moving plate; 46, spring; 47, anti-slip pad; 48, sliding rod; 49, auxiliary frame; 5, auxiliary structure; 51, positioning plate; 52, positioning groove; 53, auxiliary rod; 54, clamping plate; 55, round rod; 56, anti-slip protrusion; 57, reserved groove. Detailed implementation manners

[0027] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0028] The following describes in detail the specific implementation of the present utility model with reference to specific embodiments.

[0029] Please refer to Figures 1 to 4 , a grounding resistance testing device for lightning protection detection provided by an embodiment of the present utility model includes: a resistance measuring instrument 1, the upper surface of the resistance measuring instrument 1 is electrically connected to a plurality of wires 2, and one end of each of two wires 2 away from the resistance measuring instrument 1 is electrically connected to a probe 3, an adjusting structure 4 is provided on one side of the resistance measuring instrument 1, and an auxiliary structure 5 is provided on the side of the resistance measuring instrument 1 away from the fixing plate 41.

[0030] In an embodiment of the present utility model, please refer to Figure 1 and Figure 4, the adjustment structure 4 includes a fixing plate 41 which is fixedly connected to the resistance measuring instrument 1. On the side of the fixing plate 41 away from the resistance measuring instrument 1, a number of support plates 42 are fixedly connected. On the upper surfaces of the number of support plates 42, winding rods 43 are fixedly connected. A chute 44 is formed on the surface of the support plate 42. A moving plate 45 is slidably connected to the inner wall of the chute 44. On the side of the moving plate 45 away from the winding rod 43, two springs 46 are fixedly connected. The ends of the springs 46 away from the moving plate 45 are fixedly connected to the fixing plate 41. After the test operation is completed at the designated location, a number of wires 2 are stored on the winding rods 43, and the wound wires 2 are limited by the moving partition, improving the work efficiency of the arrangement and storage of the wires 2 and facilitating the next use. On the side of the fixing plate 41 away from the resistance measuring instrument 1, corresponding to the position of the chute 44, a number of sliding rods 48 are fixedly connected. The arc surface of the sliding rod 48 is slidably connected to the moving plate 45. The moving plate 45 is further limited by the sliding rod 48, making the moving plate 45 move more stably along the chute 44. On the side of the moving plate 45 close to the winding rod 43, an anti-slip pad 47 is fixedly connected. The anti-slip pad 47 is a rubber pad. The friction on the surface of the moving plate 45 is increased through the anti-slip pad 47, making the limiting effect of the moving plate 45 better. An auxiliary frame 49 is slidably connected to the upper surface of the fixing plate 41. Move the auxiliary frame 49 upward. After the moving plate 45 approaches the fixing plate 41, move the auxiliary frame 49 downward. The moving plate 45 is clamped by the auxiliary frame 49 to temporarily limit the moving plate 45, facilitating the user to perform the winding operation;

[0031] In an embodiment of the present invention, please refer to Figure 1 and Figure 4 , the auxiliary structure 5 includes two positioning plates 51 which are fixedly connected to the resistance measuring instrument 1. Two positioning grooves 52 are formed on the surface of the positioning plate 51. An auxiliary rod 53 is rotatably connected to the side of the resistance measuring instrument 1 close to the positioning plate 51. A clamping plate 54 is threadedly connected to the arc surface of the auxiliary rod 53. A round rod 55 is fixedly connected to the side of the resistance measuring instrument 1 close to the clamping plate 54. The arc surface of the round rod 55 is slidably connected to the clamping plate 54. The probe 3 is slid into the positioning grooves 52 of the two positioning plates 51 from the side, and the probe 3 is squeezed and limited by the clamping plate 54, fixing the position of the real-time probe 3 on the positioning plate 51, facilitating the user to store and manage the probe 3. A number of anti-slip protrusions 56 are fixedly connected to the end of the auxiliary rod 53 away from the resistance measuring instrument 1. The number of anti-slip protrusions 56 are evenly distributed on the arc surface of the auxiliary rod 53. The friction of the operating end of the auxiliary rod 53 is increased through the anti-slip protrusions 56, facilitating the user to rotate the auxiliary rod 53. Two reserved grooves 57 are formed on the side of the clamping plate 54 close to the resistance measuring instrument 1 corresponding to the position of the positioning groove 52. The reserved grooves 57 are arc-shaped grooves. The inner wall of the reserved groove 57 fits more fully with the arc surface of the probe 3, making the limiting effect of the clamping plate 54 on the probe 3 better;

[0032] The working principle of a grounding resistance testing device for lightning protection detection provided by the present utility model is as follows: By setting the adjustment structure 4, first slide the auxiliary frame 49 upward so that the height of the auxiliary frame 49 is higher than that of the moving plate 45. Then operate the moving plate 45 to move away from the winding rod 43. During this process, the moving plate 45 moves along the chute 44 on the support plate 42 towards the fixing plate 41, and the spring 46 is in a compressed state. After the moving frame fully approaches the fixing plate 41, move the auxiliary frame 49 downward, and the auxiliary frame 49 catches the upper end of the moving frame, making the moving frame unable to move under the action of the elastic force of the spring 46. At this time, the wire 2 can be wound around the winding rod 43. After the wire 2 is wound, move the auxiliary frame 49 upward, and the auxiliary frame 49 slides away from the moving plate 45, releasing the limit on the moving plate 45. The moving plate 45 moves towards the winding rod 43 under the action of the elastic force of the spring 46 until the moving plate 45 presses and limits the wound wire 2 on the winding rod 43. Among them, the moving plate 45 is further limited by the sliding rod 48 to make the movement of the moving plate 45 along the chute 44 more stable. The friction on the surface of the moving plate 45 is increased by the anti-slip pad 47 to make the limiting effect of the moving plate 45 better.

[0033] By setting the auxiliary structure 5, after the probes 3 are used, slide the two probes 3 into the positioning grooves 52 on the two positioning plates 51 from both sides respectively, and then rotate the auxiliary rod 53. The auxiliary rod 53 drives the clamping plate 54 to move towards the resistance measuring instrument 1 by means of the thread. During this process, the clamping plate 54 is set to slide along the round rod 55 until the clamping plate 54 tightly abuts against the probe 3 towards the resistance measuring instrument 1, thereby fixing the probe 3 on the positioning plate 51. Among them, the friction of the operating end of the auxiliary rod 53 is increased by the anti-slip protrusion 56 to facilitate the user to rotate the auxiliary rod 53. The inner wall of the reserved groove 57 fits more fully with the arc surface of the probe 3 to make the limiting effect of the clamping plate 54 on the probe 3 better.

[0034] The circuits and controls involved in the present utility model are all prior arts and will not be elaborated here too much.

[0035] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. All equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, are similarly included in the patent protection scope of the present utility model.

Claims

1. A grounding resistance testing device for lightning protection detection, characterized in that, Including: A resistance measuring instrument (1), several wires (2) are electrically connected to the upper surface of the resistance measuring instrument (1), and probes (3) are electrically connected to the ends of two of the wires (2) away from the resistance measuring instrument (1). An adjusting structure (4) is provided on one side of the resistance measuring instrument (1). The adjusting structure (4) includes a fixing plate (41), the fixing plate (41) is fixedly connected to the resistance measuring instrument (1), several support plates (42) are fixedly connected to the side of the fixing plate (41) away from the resistance measuring instrument (1), winding rods (43) are fixedly connected to the upper surfaces of several support plates (42), a chute (44) is formed on the surface of the support plate (42), a moving plate (45) is slidably connected to the inner wall of the chute (44), two springs (46) are fixedly connected to the side of the moving plate (45) away from the winding rod (43), and the ends of the springs (46) away from the moving plate (45) are fixedly connected to the fixing plate (41).

2. The grounding resistance testing device for lightning protection detection according to claim 1, characterized in that, Several sliding rods (48) are fixedly connected to the side of the fixing plate (41) away from the resistance measuring instrument (1) corresponding to the position of the chute (44), and the arc surface of the sliding rod (48) is slidably connected to the moving plate (45).

3. An earthing resistance testing device for lightning protection detection according to claim 1, characterized in that, An anti-slip pad (47) is fixedly connected to the side of the moving plate (45) close to the winding rod (43), and the anti-slip pad (47) is a rubber pad.

4. A grounding resistance testing device for lightning protection detection according to claim 1, characterized in that, An auxiliary frame (49) is slidably connected to the upper surface of the fixing plate (41).

5. A grounding resistance testing device for lightning protection detection according to claim 1, characterized in that, An auxiliary structure (5) is provided on the side of the resistance measuring instrument (1) away from the fixing plate (41). The auxiliary structure (5) includes two positioning plates (51), the two positioning plates (51) are fixedly connected to the resistance measuring instrument (1), two positioning grooves (52) are formed on the surface of the positioning plate (51), an auxiliary rod (53) is rotatably connected to the side of the resistance measuring instrument (1) close to the positioning plate (51), a clamping plate (54) is threadedly connected to the arc surface of the auxiliary rod (53), a round rod (55) is fixedly connected to the side of the resistance measuring instrument (1) close to the clamping plate (54), and the arc surface of the round rod (55) is slidably connected to the clamping plate (54).

6. The grounding resistance testing device for lightning protection detection according to claim 5, characterized in that, Several anti-slip protrusions (56) are fixedly connected to the end of the auxiliary rod (53) away from the resistance measuring instrument (1), and several anti-slip protrusions (56) are evenly distributed on the arc surface of the auxiliary rod (53).

7. A grounding resistance testing device for lightning protection detection according to claim 5, characterized in that, Two reserved grooves (57) are formed on the side of the clamping plate (54) close to the resistance measuring instrument (1) corresponding to the position of the positioning groove (52), and the reserved grooves (57) are arc-shaped grooves.

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