Constant-current grounding resistance tester

Abstract

The utility model discloses a constant current type grounding resistance tester. The beneficial effects are that the two side walls of the protection box are symmetrically provided with the chutes, when the tester body needs to be used, the adjusting bolts are loosened to enable the U-shaped support frames to be stretched out of the support columns, the two clamping plates can be separated from the box cover to cancel the limitation of the box cover and the protection box, and then the fixing bolts are screwed to be separated from the fixing holes, so that the tester body can be used conveniently. By arranging the U-shaped supporting frame on the protective box, limiting on the supporting column can be cancelled, the supporting column can move on the protective box and rotate to adjust the position, the clamping plate is arranged on the U-shaped supporting frame, the landing area of the U-shaped supporting frame can be increased, the U-shaped supporting frame can stably support the protective box, the box cover can be limited on the protective box through the clamping plate, and the protective box is convenient to use. When a worker lifts the protective box through the handle, the box cover can be prevented from being opened without additionally arranging a cover locking mechanism, so that the U-shaped supporting frame has a supporting function and can fix the box cover on the protective box.

Description

Technical Field

[0001] This utility model relates to the field of resistance tester technology, specifically to a constant current grounding resistance tester. Background Technology

[0002] A grounding resistance meter is a resistance measuring device used in power, postal and telecommunications, railway, communications, mining and other sectors to measure the grounding resistance of various devices, as well as the resistance value of low-resistance conductors. It can also measure soil resistivity and ground voltage.

[0003] In the use of existing constant current grounding resistance testers, in order to avoid interference from stray ground potentials to the tester body, a support rod is often set at the bottom of the protective box so that the tester body can be far away from the ground during use. However, due to the small contact area of ​​the support rod with the ground, there is a risk that the protective box cannot be stably supported. Moreover, the support rod only serves a supporting function during use. When the staff limits the box cover to the protective box, an additional locking mechanism is required. Therefore, there is an urgent need for a new type of constant current grounding resistance tester to solve these problems. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The technical problem to be solved by this utility model is to provide a constant current grounding resistance tester that can both provide support and limit the position of the closed box cover, in light of the current state of the technology.

[0006] (II) Technical Solution

[0007] This utility model is achieved through the following technical solution: This utility model proposes a constant current grounding resistance tester, including a protective box. The protective box has symmetrically opened sliding grooves on both side walls. Each sliding groove has two fixing holes. The protective box is provided with two sets of support columns at the sliding grooves. A fixing bolt is connected to the upper side wall of one side wall of each support column. Each set of support columns is provided with a U-shaped support frame. An adjustment hole is opened on the U-shaped support frame. An adjustment bolt is connected to the adjustment hole through the lower side wall of one side wall of the support column. A clamping plate is fixed to the opposite side wall of the two U-shaped support frames.

[0008] Furthermore, the protective box is connected to a lid, the top of which is fixed with a handle, and the lid is inlaid with anti-collision sponge. The protective box contains the testing instrument body.

[0009] Furthermore, the groove is formed on the outer wall of the protective box, and the fixing holes are formed on both sides inside the groove.

[0010] Furthermore, the protective box is connected to the box lid via a hinge, the box lid is connected to the handle via bolts, and the anti-collision sponge is bonded to the box lid.

[0011] Furthermore, the fixing bolt passes through the support column and is threadedly connected to the fixing hole, and the fixing bolt is rotatably connected to the support column, which is made of stainless steel.

[0012] Furthermore, the support column is slidably connected to the U-shaped support frame, and the adjustment hole is formed on the U-shaped support frame.

[0013] Furthermore, the adjusting bolt passes through the support column and is threadedly connected to the adjusting hole, the U-shaped support frame is welded to the clamping plate, and the clamping plate has an L-shaped structure.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model has the following advantages:

[0016] This invention utilizes symmetrical sliding grooves on both sides of the protective box. When the testing instrument body is needed, the adjusting bolt is first loosened to pull the U-shaped support frame out from the support column, thus separating the two clamping plates from the box cover and eliminating the restriction on the box cover and the protective box. Then, the fixing bolt is turned to disengage it from the fixing hole, thus eliminating the restriction on the support column on the protective box. This allows the support column to move and rotate on the protective box to adjust its position. After fixing the support column, which has been rotated to a vertical position, to the protective box with the fixing bolt, the support column and the U-shaped support frame can support the protective box. By setting clamping plates on the U-shaped support frame, the contact area of ​​the U-shaped support frame can be increased, allowing the U-shaped support frame to stably support the protective box. Moreover, the clamping plates can limit the box cover on the protective box. When the operator lifts the protective box with the handle, there is no need to set an additional locking mechanism to prevent the box cover from opening. Thus, the U-shaped support frame can provide support while fixing the box cover to the protective box. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a constant current grounding resistance tester according to the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the constant current grounding resistance tester described in this utility model during use;

[0019] Figure 3 This is a split view of the central support column and fixing bolt of the constant current grounding resistance tester described in this utility model.

[0020] The annotations in the attached figures are explained as follows:

[0021] 1. Protective box; 2. Slide groove; 3. Fixing hole; 4. Support column; 5. Fixing bolt; 6. U-shaped support frame; 7. Adjustment hole; 8. Adjustment bolt; 9. Clamping plate; 10. Box cover; 11. Handle; 12. Anti-collision sponge; 13. Tester body. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this 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 merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] like Figures 1-3 As shown, a constant current grounding resistance tester in this embodiment includes a protective box 1. The protective box 1 has symmetrically arranged sliding grooves 2 on both side walls. Each sliding groove 2 has two fixing holes 3. The fixing holes 3 facilitate the adjustment of the position of the support columns 4 on the protective box 1. Two sets of support columns 4 are arranged at the sliding grooves 2 on the protective box 1. Fixing bolts 5 are connected to the upper side wall of each support column 4. The fixing bolts 5 cooperate with the fixing holes 3 to facilitate the fixing of the support columns 4 onto the protective box 1. Loosening the fixing bolts 5 allows the support columns 4 to rotate and adjust their position on the protective box 1. Each set of support columns 4... Each U-shaped support frame 6 is provided inside, and an adjustment hole 7 is opened on the U-shaped support frame 6. An adjustment bolt 8 is connected to the adjustment hole 7 through the lower side wall of the support column 4. A clamping plate 9 is fixed on the opposite side wall of the two U-shaped support frames 6. The adjustment bolt 8 and the adjustment hole 7 can make the U-shaped support frame 6 more firmly fixed on the support column 4, which is convenient for limiting the U-shaped support frame 6 after the length is adjusted. The U-shaped support frame 6 can fix the clamping plate 9 more stably. The clamping plate 9 can increase the ground contact area of ​​the U-shaped support frame 6. At the same time, when not in use and folded up, it limits the box cover 10 to the protective box 1.

[0024] like Figures 1-3As shown, in this embodiment, a lid 10 is connected to the protective box 1, and a handle 11 is fixedly fixed at the center of the top of the lid 10. Anti-collision sponge 12 is embedded inside the lid 10. The testing instrument body 13 is installed inside the protective box 1. The protective box 1 can better secure the lid 10, and the lid 10 can better close the protective box 1. The lid 10 can also more firmly fix the handle 11. A sliding groove 2 is formed on the outer wall of the protective box 1, and fixing holes 3 are formed on both sides inside the sliding groove 2. The protective box 1 and the lid 10 are connected by hinges, and the lid 10 and the handle 11 are connected by bolts. The anti-collision sponge 12 is bonded to the lid 10. The handle 11 makes it easier for workers to handle the protective box. The protective case 1 can be lifted and carried. The anti-collision sponge 12 can better protect the tester body 13 and prevent the tester body 13 from colliding with the case cover 10. The fixing bolt 5 passes through the support column 4 and is threadedly connected to the fixing hole 3. The fixing bolt 5 and the support column 4 are rotatably connected. The support column 4 is made of stainless steel. The support column 4 is slidably connected to the U-shaped support frame 6. The adjustment hole 7 is formed on the U-shaped support frame 6. The U-shaped support frame 6 is easy to extend and retract within the support column 4 to adjust the length, which can better support the protective case 1 to a certain height. The adjustment bolt 8 passes through the support column 4 and is threadedly connected to the adjustment hole 7. The U-shaped support frame 6 is welded to the clamping plate 9. The clamping plate 9 has an L-shaped structure.

[0025] The specific implementation process of this embodiment is as follows: In use, the tester inside the protective case 1 is first carried to the place of use by the handle 11. After opening the case cover 10, professionals can use the tester body 13 to perform measurement work. By symmetrically opening the sliding grooves 2 on both sides of the protective case 1, when the tester body 13 needs to be used, first loosen the adjusting bolt 8 to pull the U-shaped support frame 6 out from the support column 4, so that the two clamping plates 9 can be separated from the case cover 10 and the limitation on the case cover 10 and the protective case 1 can be removed. Then, tighten the fixing bolt 5 to disengage it from the fixing hole 3, so that the limitation on the support column 4 on the protective case 1 can be removed, making it easier for the support column 4 to be placed on the protective case 1. After the support column 4, rotated to a vertical position, is fixed to the protective box 1 by the fixing bolt 5, the support column 4 and the U-shaped support frame 6 can support the protective box 1. By setting the clamping plate 9 on the U-shaped support frame 6, the ground contact area of ​​the U-shaped support frame 6 can be increased, so that the U-shaped support frame 6 can stably support the protective box 1. Moreover, the clamping plate 9 can limit the box cover 10 on the protective box 1. When the staff lifts the protective box 1 by the handle 11, there is no need to set an additional locking mechanism to prevent the box cover 10 from opening. Thus, the U-shaped support frame 6 can provide support while fixing the box cover 10 to the protective box 1.

[0026] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A constant current grounding resistance tester, characterized in that: The protective box (1) includes a protective box (1) with symmetrical grooves (2) on both sides of the protective box (1). Each groove (2) has two fixing holes (3). The protective box (1) is provided with two sets of support columns (4) at the grooves (2). A fixing bolt (5) is connected to the upper side wall of one side of the support column (4). Each set of support columns (4) is provided with a U-shaped support frame (6). An adjustment hole (7) is provided on the U-shaped support frame (6). An adjustment bolt (8) is connected to the lower side wall of one side of the support column (4) through the adjustment hole (7). A card plate (9) is fixed to the opposite side wall of the two U-shaped support frames (6).

2. The constant current grounding resistance tester according to claim 1, characterized in that: The protective box (1) is connected to a lid (10), and a handle (11) is fixed at the top center of the lid (10). Anti-collision sponge (12) is embedded in the lid (10), and the tester body (13) is installed inside the protective box (1).

3. A constant current grounding resistance tester according to claim 1, characterized in that: The groove (2) is formed on the outer wall of the protective box (1), and the fixing hole (3) is formed on both sides inside the groove (2).

4. A constant current grounding resistance tester according to claim 2, characterized in that: The protective box (1) is hinged to the box cover (10), the box cover (10) is bolted to the handle (11), and the anti-collision sponge (12) is bonded to the box cover (10).

5. A constant current grounding resistance tester according to claim 1, characterized in that: The fixing bolt (5) passes through the support column (4) and is threadedly connected to the fixing hole (3). The fixing bolt (5) is rotatably connected to the support column (4). The support column (4) is made of stainless steel.

6. A constant current grounding resistance tester according to claim 1, characterized in that: The support column (4) is slidably connected to the U-shaped support frame (6), and the adjustment hole (7) is formed on the U-shaped support frame (6).

7. A constant current grounding resistance tester according to claim 1, characterized in that: The adjusting bolt (8) passes through the support column (4) and is threadedly connected to the adjusting hole (7). The U-shaped support frame (6) is welded to the clamping plate (9), and the clamping plate (9) has an L-shaped structure.

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