Adjustable grounding resistance tester

Abstract

The utility model discloses an adjustable grounding resistance tester, which belongs to the technical field of resistance testers and comprises a box body, a bearing block is mounted in the box body in a buckling manner, a tester main body is placed in the bearing block, the bottom of the box body is rotationally connected with a support frame in a symmetrical structure, and a rubber pad is arranged at the bottom of a base plate; according to the utility model, the box body is carried to a place needing a grounding resistance test and placed on a relatively flat ground, and the bottom of the box body is rotatably connected with the support frame, so that the support frame is firstly kept in a folded state, and the support frame with a symmetrical structure at the bottom of the box body is rotatably unfolded outwards to form a vertical angle with the bottom of the box body; according to the test requirement, the threaded rod located on the outer side of the supporting frame is rotated, the threaded rod penetrates through the supporting frame, the end, located in the supporting frame, of the threaded rod makes contact with the outer side of the extension rod, the pressure of the threaded rod on the extension rod is changed, the risks of pollution and collision damage are reduced, meanwhile, the operation time is saved, and the work efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of resistance testers, specifically an adjustable grounding resistance tester. Background Technology

[0002] Accurate measurement of grounding resistance is crucial for the safe operation of facilities such as power systems, communication base stations, and buildings. As the core equipment for achieving accurate measurement, the performance and function of the grounding resistance tester directly affect the safety assessment of the grounding system. Currently, most common grounding resistance testers on the market adopt a box-type structure to protect and store the tester body in order to meet the needs of outdoor mobile testing.

[0003] Existing ground resistance testers typically have the main body of the tester placed directly inside a box, with only simple support feet at the bottom. When in use, the main body of the tester must be removed.

[0004] Furthermore, existing resistance testers are difficult to operate at different heights. In terms of cable storage, most existing devices only have simple hooks or straps for arbitrarily wrapping the cables. This not only easily causes the cables to become tangled and knotted, but also causes the loose cables to shake and collide inside the box during transport. This not only affects the rational use of storage space, but also increases the risk of damage to the cable sheath and breakage of the internal wires. Utility Model Content

[0005] To overcome the above-mentioned shortcomings, this utility model provides an adjustable grounding resistance tester, which solves the problem that existing resistance testers are difficult to operate at different heights and that most existing devices only have simple hooks or straps for storing connecting wires, which are used to arbitrarily wrap the connecting wires.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an adjustable grounding resistance tester, comprising a housing, a support block snapped into the housing, a tester body placed inside the support block, a support frame rotatably connected to the bottom of the housing in a symmetrical structure, the support frame being a U-shaped structure, an extension rod slidably connected inside the support frame, a threaded rod threadedly connected to the outside of the support frame, the threaded rod penetrating the support frame, the end of the threaded rod located inside the support frame contacting the outside of the extension rod, a pad being provided at the bottom of each extension rod, and a rubber pad being provided at the bottom of the pad.

[0007] As a further embodiment of this utility model: a box cover is installed on the top of the box body by a locking buckle, a first limiting frame is fixedly installed inside the box cover, a plurality of take-up shafts for use with the main body of the tester are rotatably connected inside the first limiting frame, a second limiting frame for use with the take-up shafts is snapped to the bottom of the first limiting frame, and a plurality of rotating blocks for use with the take-up shafts are rotatably connected to the bottom of the second limiting frame.

[0008] As a further embodiment of this utility model: the top of the box cover has symmetrically installed protrusions, and the protrusions are rotatably connected to each other. The outer side of the box cover is fixedly connected to a locking block, which has an L-shaped structure. A slot for use with the locking block is opened on one side of the top of the box body.

[0009] As a further embodiment of this utility model: the bottom of the support block is provided with shock-absorbing sponge, and the bottom of the box is provided with a second slot for use with the support block.

[0010] As a further embodiment of this utility model: the bottom of the box is equipped with multiple sets of support legs in a symmetrical structure, and the bottom of the box is provided with an installation groove and a first slot for use with the support frame.

[0011] As a further aspect of this utility model: both the first slot and the second slot are semi-circular structures.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. Move the enclosure to the site where the grounding resistance test needs to be performed and place it on a relatively flat ground. Since the bottom of the enclosure is connected to a support frame, keep the support frame folded for easy handling. Rotate the symmetrical support frame at the bottom of the enclosure outward to make it perpendicular to the bottom of the enclosure. According to the test requirements, rotate the threaded rod located on the outside of the support frame. Because the threaded rod passes through the support frame and its end inside the support frame contacts the outside of the extension rod, the pressure on the extension rod changes as the threaded rod rotates, allowing the extension rod to slide up and down within the U-shaped support frame. After adjusting the extension rod to a suitable height so that the main body of the tester is in a position that is easy to observe and operate, rotate the threaded rod in the opposite direction so that it presses tightly against the extension rod, thereby fixing the position of the extension rod and completing the adjustment of the enclosure height.

[0014] 2. If the housing needs to be moved, first loosen the threaded rod, retract the extension rod into the support frame, then rotate and fold the support frame to the bottom of the housing, and fasten the housing. It can then be moved without removing the main body of the tester from the housing, avoiding the tedious operation of frequent handling. Testers can directly connect circuits and read data inside the housing, especially in complex or harsh test environments, such as muddy ground or confined spaces. This reduces the contact between the main body of the tester and the external environment, lowering the risk of contamination and collision damage, while also saving operation time and improving work efficiency. Attached Figure Description

[0015] Figure 1 This is a first-view schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a second-view schematic diagram of the overall structure of this utility model;

[0017] Figure 3 This is a first-view schematic diagram of the disassembled structure of this utility model;

[0018] Figure 4 This is a second-view schematic diagram of the disassembled structure of this utility model;

[0019] Figure 5 This is a cross-sectional structural diagram of the present invention.

[0020] In the diagram: 1. Box body; 2. Box cover; 3. Protrusion; 4. Handle; 5. Locking block; 6. Lock; 7. Support frame; 8. Extension rod; 9. Threaded rod; 10. First slot; 11. Slot; 12. Support block; 13. Tester body; 14. Second slot; 15. First limiting frame; 16. Second limiting frame; 17. Take-up shaft; 18. Rotating block; 19. Mounting slot. Detailed Implementation

[0021] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0022] like Figures 1-5 As shown, this utility model provides a technical solution:

[0023] An adjustable grounding resistance tester includes a housing 1, a support block 12 is snapped into the housing 1, and the tester body 13 is placed inside the support block 12. The bottom of the housing 1 is symmetrically connected to a support frame 7, which is U-shaped. An extension rod 8 is slidably connected inside the support frame 7, and a threaded rod 9 is threadedly connected to the outside of the support frame 7. The threaded rod 9 passes through the support frame 7, and the end of the threaded rod 9 located inside the support frame 7 contacts the outside of the extension rod 8. A pad is provided at the bottom of each extension rod 8, and a rubber pad is provided at the bottom of the pad.

[0024] Specifically, transport the enclosure 1 to the site where the grounding resistance test needs to be performed and place it on a relatively flat surface. Since the bottom of the enclosure 1 is rotatably connected to the support frame 7, keep the support frame 7 folded for easy handling. Rotate the symmetrical support frame 7 at the bottom of the enclosure 1 outwards to form a perpendicular angle with the bottom of the enclosure 1. According to the test requirements, rotate the threaded rod 9 located on the outside of the support frame 7. Because the threaded rod 9 passes through the support frame 7 and its end inside the support frame 7 contacts the outside of the extension rod 8, the pressure on the extension rod 8 changes as the threaded rod 9 rotates, allowing the extension rod 8 to slide up and down within the U-shaped support frame 7. After adjusting the extension rod 8 to a suitable height so that the main body 13 of the tester is in a position that is easy to observe and operate, rotate the threaded rod 9 in the opposite direction to make it tightly press against the extension rod 8, thereby fixing the position of the extension rod 8 and completing the height adjustment of the enclosure 1. After the height of the enclosure 1 is adjusted, open the enclosure 1 directly. The main body 13 of the test instrument is installed in the support block 12 by a snap-fit. There is no need to remove the main body 13 of the test instrument. The test circuit can be directly connected inside the box 1. The test instrument 13 is turned on to perform the grounding resistance test. During the test, the data displayed on the main body 13 of the test instrument can be observed at any time. After the test is completed, the test circuit is disconnected and the main body 13 of the test instrument is turned off. If the box 1 needs to be moved, first loosen the threaded rod 9, retract the extension rod 8 into the support frame 7, then rotate and fold the support frame 7 to the bottom of the box 1, and fasten the box 1. It can then be moved. There is no need to take the main body 13 of the test instrument out of the box 1. It can be used directly without the need to take the main body 13 of the test instrument out of the box 1. This avoids the tedious operation of frequent picking and putting. The tester can directly connect the circuit and read the data inside the box 1. Especially in some complex or harsh test environments, such as muddy ground and narrow space, it reduces the contact between the main body 13 of the test instrument and the external environment, reduces the risk of contamination and collision damage, and also saves operation time and improves work efficiency.

[0025] The top of the box body 1 is fastened with a box cover 2 by a latch 6. A first limiting frame 15 is fixedly installed inside the box cover 2. Multiple sets of take-up shafts 17 for use with the main body 13 of the tester are rotatably connected inside the first limiting frame 15. A second limiting frame 16 for use with the take-up shaft 17 is latched and connected below the first limiting frame 15. Multiple sets of rotating blocks 18 for use with the take-up shaft 17 are rotatably connected to the bottom of the second limiting frame 16. The top of the box cover 2 is symmetrically structured with protrusions 3. Handles 4 are rotatably connected between the protrusions 3. A locking block 5 is fixedly connected to the outside of the box cover 2. The locking block 5 has an L-shaped structure. A slot 11 for use with the locking block 5 is opened on one side of the top of the box body 1.

[0026] Specifically, the design of the take-up spool 17 in conjunction with the first limiting frame 15, the second limiting frame 16, and the rotating block 18 provides a neat storage space for the tester's connecting cable. After testing, the connecting cable can be neatly wound around the take-up spool 17, preventing tangling and making it easy to retrieve next time. Moreover, this built-in storage method prevents the connecting cable from scattering due to shaking during transport, keeping the inside of the housing 1 clean and reducing the risk of cable damage. The cooperation between the locking block 5 and the slot 11 allows the lid 2 to be inverted and fixed to one side of the housing 1, transforming it into a small platform. In actual testing, this small platform can be used to temporarily place testing tools, notebooks, and other small items, providing testers with an additional operating platform without the need to find other support surfaces. This allows testers to easily access items, improving work efficiency and reducing the risk of damage. To prevent the loss of small items due to careless placement, the lid 2 has symmetrically arranged handles 4 on top, which are rotatably connected to the protrusions 3. When carrying the tester, the tester can easily lift the entire device using the handles 4. The rotatable connection design allows the handles 4 to fit snugly against the lid 2 when not in use, reducing space occupation and facilitating storage. Moreover, the symmetrical structure of the handles 4 ensures even force distribution when lifting, making it easier and more stable to carry. The lid 2 is snapped onto the body 1 using the latch 6, ensuring the tightness and stability of the connection between the lid 2 and the body 1. It will not easily open during carrying and use. At the same time, the first limiting frame 15, the second limiting frame 16, and other components fix the winding shaft 17 and other components, making the internal structure of the lid 2 stable. Even when shaken, the internal winding shaft 17 and connecting wire will not shift, further ensuring the reliability of the overall structure of the tester.

[0027] The bottom of the support block 12 is provided with shock-absorbing sponge, and the bottom of the box body 1 is provided with a second slot 14 for use with the support block 12. The bottom of the box body 1 is equipped with multiple sets of support legs in a symmetrical structure, and the bottom of the box body 1 is provided with an installation slot 19 and a first slot 10 for use with the support frame 7. Both the first slot 10 and the second slot 14 are semi-arc structures.

[0028] Specifically, the bottom of the support block 12 is equipped with shock-absorbing sponge, which can effectively buffer the impact of external vibration on the main body 13 of the tester. During transportation or use, even if the housing 1 is hit or vibrated, the shock-absorbing sponge can play a good role in shock absorption, reducing the risk of damage to the main body 13 of the tester due to vibration and extending its service life. The bottom of the housing 1 is equipped with a second slot 14 for use with the support block 12, and an installation slot 19 and a first slot 10 for use with the support frame 7. Both the first slot 10 and the second slot 14 are semi-circular structures, which can flexibly unfold the support frame 7 and remove the support block 12.

[0029] The working principle of this utility model is as follows:

[0030] First, complete the test preparation and height adjustment. Move the folded box 1 to the test site and place it. Unfold the symmetrical U-shaped support frame 7 at the bottom. By rotating the threaded rod 9 on the outside of the support frame 7, change its pressure on the extension rod 8, so that the extension rod 8 slides in the support frame 7. After adjusting to a suitable height, rotate the threaded rod 9 in the opposite direction to fix it, and complete the height adjustment of the box 1 to provide a convenient height for the test operation.

[0031] Next, perform the grounding resistance test. Open the box 1. The main body 13 of the tester is fixed in the support block 12 by the buckle and does not need to be taken out. Connect the test line directly in the box 1, open the main body 13 of the tester to perform the grounding resistance test, and observe the data at any time during the test.

[0032] It is worth mentioning that the tester is designed with storage and auxiliary functions in mind. After the test, the winding shaft 17, the first limiting frame 15, the second limiting frame 16 and the rotating block 18 inside the case cover 2 can be used to neatly wind and store the tester's connecting wires. The L-shaped locking block 5 on the outside of the case cover 2 cooperates with the locking groove 11 on the top of the case body 1 to fix the case cover 2 upside down as a small platform for placing test tools, etc. The top handle 4 of the case cover 2 is rotatably connected to the protrusion 3, making it easy to carry and allowing it to be stored neatly when not in use. In addition, the shock-absorbing sponge at the bottom of the support block 12 can buffer vibrations and protect the tester body 13. The second slot 14, the mounting slot 19 and the first slot 10 (all semi-circular) at the bottom of the case body 1 facilitate the unfolding and storage of the support frame 7 and the removal and placement of the support block 12.

[0033] Finally, after completing the test, store and move the device. After the test is completed, disconnect the circuit, turn off the main body 13 of the tester, loosen the threaded rod 9 and retract the extension rod 8, fold the support frame 7, and fasten the box cover 2. The tester can then be moved and prepared for the next use.

[0034] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An adjustable grounding resistance tester, comprising a housing (1), characterized in that: The housing (1) is fitted with a support block (12), and the main body of the tester (13) is placed inside the support block (12). The bottom of the housing (1) is symmetrically connected to a support frame (7). The support frame (7) is a U-shaped structure. An extension rod (8) is slidably connected inside the support frame (7). A threaded rod (9) is threadedly connected to the outside of the support frame (7). The threaded rod (9) passes through the support frame (7). The end of the threaded rod (9) inside the support frame (7) contacts the outside of the extension rod (8). A pad is provided at the bottom of the extension rod (8), and a rubber pad is provided at the bottom of the pad.

2. The adjustable grounding resistance tester according to claim 1, characterized in that: The top of the box (1) is fastened with a box cover (2) by a latch (6). A first limiting frame (15) is fixedly installed inside the box cover (2). Multiple sets of take-up shafts (17) for use with the main body (13) of the tester are rotatably connected inside the first limiting frame (15). A second limiting frame (16) for use with the take-up shaft (17) is fastened to the bottom of the first limiting frame (15). Multiple sets of rotating blocks (18) for use with the take-up shaft (17) are rotatably connected to the bottom of the second limiting frame (16).

3. An adjustable grounding resistance tester according to claim 2, characterized in that: The top of the box cover (2) is fixedly equipped with protrusions (3) in a symmetrical structure. A handle (4) is rotatably connected between the protrusions (3). A locking block (5) is fixedly connected to the outside of the box cover (2). The locking block (5) has an L-shaped structure. A slot (11) is opened on one side of the top of the box body (1) to cooperate with the locking block (5).

4. An adjustable grounding resistance tester according to claim 3, characterized in that: The bottom of the support block (12) is provided with shock-absorbing sponge, and the bottom of the box (1) is provided with a second slot (14) for use with the support block (12).

5. An adjustable grounding resistance tester according to claim 4, characterized in that: The bottom of the box (1) is equipped with multiple sets of support legs in a symmetrical structure, and the bottom of the box (1) is provided with an installation groove (19) and a first slot (10) for use with the support frame (7).

6. An adjustable grounding resistance tester according to claim 5, characterized in that: Both the first slot (10) and the second slot (14) are semi-circular structures.

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