Portable withstand voltage insulation resistance tester

Abstract

The utility model relates to the technical field of insulation resistance testers, and discloses a portable withstand voltage insulation resistance tester, which comprises a fixed shaft fixedly connected inside a box body; the top plate is fixedly connected to the top of the fixed shaft; the first spring is fixedly connected to the bottom of the top plate and arranged outside the fixing shaft in a sleeving mode. The fixing plate is slidably connected to the exterior of the fixing shaft and fixedly connected with the bottom end of the first spring; the test wire is wound outside the fixed shaft; and the limiting mechanism is arranged on the box body. One end of a test wire is placed on the top of a first fixing block, a fixing plate is moved upwards, the fixing plate compresses a first spring, then the middle of the test wire is wound outside a fixing shaft, after winding is completed, the other end of the test wire is placed on a second fixing block, the fixing plate is loosened, and the first spring drives the fixing plate to move downwards; the fixing plate is used for fixing the test wire wound at the bottom, so that the phenomenon that the test wire is wound and knotted when being placed in the box body is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of insulation resistance testers, specifically a portable withstand voltage insulation resistance tester. Background Technology

[0002] The insulation resistance tester, also known as a megohmmeter, high-voltage megohmmeter, or high-voltage insulation resistance tester, is specifically designed for insulation testing in laboratories or on-site. This instrument features a large LCD screen with gray-white backlight, data storage, and data retrieval functions. It also automatically calculates the absorption ratio and polarization index, and automatically stores data for 15 seconds, 30 seconds, 1 minute, and 10 minutes. It boasts high resolution, convenient operation, portability, accuracy, reliability, stable performance, and strong anti-interference capabilities.

[0003] Existing insulation resistance testers require the test leads to be plugged in before testing. After testing, the test leads are unplugged and placed in the box along with the insulation resistance tester. The test leads are not easy to fix, which makes them prone to displacement inside the box, increasing the probability of the test leads getting tangled and knotted, affecting the next use. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a portable withstand voltage insulation resistance tester with the advantage of fixed test leads. This solves the problem that the test leads of existing insulation resistance testers are usually placed directly inside the box, and the test leads are prone to tangling and knotting inside the box, thus affecting the next use.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a portable withstand voltage insulation resistance tester, comprising a main body assembly, wherein the main body assembly includes:

[0008] The box body has a hinged lid at the top;

[0009] The insulation resistance tester body is located inside the enclosure;

[0010] The housing is provided with a fixing component, which includes:

[0011] A fixed shaft is fixedly connected inside the housing;

[0012] Top plate, fixedly connected to the top of the fixed shaft;

[0013] Spring 1 is fixedly connected to the bottom of the top plate, and the spring is sleeved outside the fixed shaft;

[0014] A fixed plate is slidably connected to the outside of the fixed shaft and fixedly connected to one bottom end of the spring;

[0015] The test lead is wound around the outside of the fixed shaft;

[0016] Fixing block one is fixedly connected to the inside of the housing, and one end of the test line is placed on fixing block one;

[0017] Fixing block two is fixedly connected to the inside of the housing, and the other end of the test line is placed on fixing block two;

[0018] A limiting mechanism is provided on the housing.

[0019] Preferably, the limiting mechanism includes:

[0020] The bracket is fixedly connected to the inner side wall of the box.

[0021] A movable rod passes through and is slidably connected to the bracket;

[0022] A limiting block is fixedly connected to one end of the movable rod near the fixed plate;

[0023] Spring 2 is fixedly connected to the opposing surfaces of the bracket and the limiting block, and spring 2 is sleeved on the outside of the movable rod.

[0024] Preferably, two sets of the fixing components are symmetrically arranged.

[0025] Preferably, a connecting plate is fixedly connected between the two fixing plates.

[0026] Preferably, the bottom of the fixing plate has an arc-shaped groove.

[0027] Preferably, the inner wall of the box cover is symmetrically and fixedly connected with spring three, and the end of spring three away from the box cover is fixedly connected with a protective plate. The top of the box body is provided with a placement groove, and the placement groove has the same area as the protective plate.

[0028] (III) Beneficial Effects

[0029] Compared with the prior art, this utility model provides a portable withstand voltage insulation resistance tester, which has the following beneficial effects:

[0030] This tester features a unique advantage in securing test leads. One end of the test lead is placed on top of a fixing block, and the fixing plate is moved upwards. The fixing plate compresses a spring, causing the middle of the test lead to wind around the outside of the fixing shaft. After winding, the other end of the test lead is placed on a second fixing block, and the fixing plate is released. The spring then moves the fixing plate downwards, securing the bottom-wound test lead and preventing tangling and knotting when the test lead is placed inside the enclosure. This solves the problem of existing insulation resistance testers where externally plugged test leads are typically placed directly inside the enclosure, easily becoming tangled and knotted, thus affecting subsequent use. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of this utility model;

[0032] Figure 2 This is an enlarged structural diagram of point A in this utility model;

[0033] Figure 3 This is a schematic diagram of the limiting mechanism in this utility model;

[0034] Figure 4 This is a schematic diagram of the structure of this utility model without test lines.

[0035] Figure 5 This is a schematic diagram of the arc-shaped groove structure in this utility model.

[0036] In the picture:

[0037] 1. Main components; 11. Enclosure; 12. Enclosure cover; 13. Insulation resistance tester body;

[0038] 2. Fixing components; 21. Fixing shaft; 22. Top plate; 23. Spring 1; 24. Fixing plate; 241. Arc-shaped groove; 25. Test line; 251. Fixing block 1; 252. Fixing block 2; 26. Limiting mechanism; 261. Bracket; 262. Movable rod; 263. Limiting block; 264. Spring 2; 27. Connecting plate;

[0039] 3. Protective plate; 31. Spring 3; 32. Placement slot. Detailed Implementation

[0040] 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.

[0041] Example 1

[0042] See Figure 1-5 A portable withstand voltage insulation resistance tester includes a main body assembly 1, which includes: a housing 11 with a cover 12 hinged to its top; an insulation resistance tester body 13 disposed inside the housing 11; and a fixing assembly 2 disposed on the housing 11, which includes: a fixing shaft 21 fixedly connected to the inside of the housing 11; a top plate 22 fixedly connected to the top of the fixing shaft 21; and a spring 23 fixedly connected to the bottom of the top plate 22, the spring 23 being sleeved on the top plate 22. The structure includes: a fixed shaft 21 externally; a fixed plate 24 slidably connected to the outside of the fixed shaft 21 and fixedly connected to the bottom end of the first spring 23; a test wire 25 wound around the outside of the fixed shaft 21; a first fixed block 251 fixedly connected to the inside of the housing 11, with one end of the test wire 25 placed on the first fixed block 251; a second fixed block 252 fixedly connected to the inside of the housing 11, with the other end of the test wire 25 placed on the second fixed block 252; and a limiting mechanism 26 disposed on the housing 11. The limiting mechanism 26 includes: a bracket 261 fixedly connected to the inner side wall of the housing 11; a movable rod 262 passing through and slidably connected to the bracket 261; a limiting block 263 fixedly connected to one end of the movable rod 262 near the fixed plate 24; and a second spring 264 fixedly connected to the opposing surfaces of the bracket 261 and the limiting block 263, with the second spring 264 sleeved on the outside of the movable rod 262. The fixing components 2 are arranged symmetrically in two sets.

[0043] When in use, after the insulation resistance tester body 13 is finished, the operator disconnects the test lead 25 connected to the body 13. One end of the test lead 25 is placed on top of the fixing block 251, and the fixing plate 24 is moved upward. The fixing plate 24 compresses the spring 23, and then the middle part of the test lead 25 is wound around the outside of the fixing shaft 21. After winding, the other end of the test lead 25 is placed on the fixing block 252, and the fixing plate 24 is released. The spring 23 drives the fixing plate 24 to move downward, and the fixing plate 24 fixes the bottom of the wound test lead 25, preventing the test lead 25 from tangling or knotting when placed inside the housing 11. Since the insulation resistance tester body 13 is placed inside the housing 11 after use, and the test lead 25 is fixed, the housing cover 12 is closed. The housing 11 stores the insulation resistance tester body 13 and the test lead 25 together, increasing the convenience and pressure resistance of the insulation resistance tester body 13 when carried. The operator utilizes the limiting mechanism 26 to wind the test wire 25 without continuously lifting the fixing plate 24: When the operator lifts the fixing plate 24 before winding the test wire 25, the top of the fixing plate 24 passes the inclined surface at the bottom of the limiting block 263, pushing the limiting block 263 towards the second spring 264. The second spring 264 is compressed. When the bottom of the fixing plate 24 moves above the limiting block 263, the second spring 264 pushes the limiting block 263 to the bottom of the fixing plate 24, limiting the fixing plate 24 and facilitating the winding of the test wire 25. After the test wire 25 is wound, the operator pulls the movable rod 262 away from the fixing plate 24. The movable rod 262 moves the limiting block 263 out of the bottom of the fixing plate 24. At this time, the fixing plate 24 automatically moves down under the influence of the first spring 23, fixing the test wire 25. The multiple sets of fixing components 2 allow the housing 11 to fix two test wires 25 simultaneously, reducing the probability of the test wires 25 tangling.

[0044] The insulation resistance tester body 13 uses a voltage to excite the device or network under test, then measures the current generated by the excitation, and uses Ohm's law to measure the resistance. The workflow is as follows: First, insert two grounding probes into the ground at distances of 20m and 40m from the grounding electrode, respectively, along the radial direction of the grounding electrode, to a depth of 400mm. Then, place the grounding resistance tester horizontally near the grounding electrode and connect the wires. After placing the insulation resistance tester body 13 horizontally, check if the galvanometer pointer points to the center line; otherwise, adjust the "zero adjustment" to make the pointer of the insulation resistance tester body 13 point to the center line. Set the "multiplier scale" to the maximum multiplier and slowly rotate the generator handle while simultaneously rotating the "measuring scale dial" to make the galvanometer pointer point to the center line. When the galvanometer pointer is close to equilibrium, accelerate the rotation of the handle to a speed of 120r / min or higher, while simultaneously adjusting the "measuring scale dial" to make the pointer point to the center line. If the reading of the "measuring scale dial" is too small and difficult to read accurately, it indicates that the multiplier scale is too large. At this point, the "magnification scale" should be set to a smaller multiplier, and the "measurement scale" should be readjusted so that the pointer points to the center line and an accurate reading is obtained. The specific structure will not be described in detail here.

[0045] Example 2

[0046] An auxiliary function has been added based on Embodiment 1.

[0047] See Figure 1-5 A connecting plate 27 is fixedly connected between the two fixing plates 24. An arc-shaped groove 241 is provided at the bottom of the fixing plate 24. Springs 31 are symmetrically and fixedly connected to the inner wall of the box cover 12. A protective plate 3 is fixedly connected to the end of the springs 31 away from the box cover 12. A placement groove 32 is provided on the top of the box body 11. The placement groove 32 has the same area as the protective plate 3.

[0048] When the operator lifts one fixing plate 24, that fixing plate 24 moves upward simultaneously via the connecting plate 27, and is fixed by the limiting block 263, facilitating the operator to wind the two test leads 25 separately. After winding, the operator simultaneously moves the movable rod 262, causing the two movable rods 262 to move away in opposite directions, thus releasing the limiting blocks 263 from restricting the fixing plates 24, facilitating the simultaneous fixing of the two test leads 25. The arc-shaped groove 241 increases the contact area between the fixing plate 24 and the test leads 25, thereby enhancing the fixing effect. When the box cover 12 is closed, the protective plate 3 on the box cover 12 moves into the placement slot 32. The protective plate 3 is located on the top of the insulation resistance tester body 13, protecting the top surface of the insulation resistance tester body 13 and reducing the probability of the insulation resistance tester body 13 being bumped inside the box 11.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A portable withstand voltage insulation resistance tester, comprising a main body component (1), said main body component (1) comprising: The box body (11) has a lid (12) hinged to its top. The insulation resistance tester body (13) is located inside the housing (11); The feature is that a fixing component (2) is provided on the housing (11), and the fixing component (2) includes: A fixed shaft (21) is fixedly connected to the inside of the housing (11); Top plate (22) is fixedly connected to the top of the fixed shaft (21); Spring 1 (23) is fixedly connected to the bottom of the top plate (22), and spring 1 (23) is sleeved on the outside of the fixed shaft (21); The fixed plate (24) is slidably connected to the outside of the fixed shaft (21) and fixedly connected to the bottom end of the spring (23); Test line (25) is wound around the outside of the fixed shaft (21); Fixing block 1 (251) is fixedly connected to the inside of the box (11), and one end of the test line (25) is placed on fixing block 1 (251); Fixing block two (252) is fixedly connected to the inside of the box (11), and the other end of the test line (25) is placed on fixing block two (252); A limiting mechanism (26) is provided on the housing (11).

2. The portable withstand voltage insulation resistance tester according to claim 1, characterized in that: The limiting mechanism (26) includes: The bracket (261) is fixedly connected to the inner wall of the box (11); The movable rod (262) passes through and is slidably connected to the bracket (261); A limiting block (263) is fixedly connected to one end of the movable rod (262) near the fixed plate (24); Spring 2 (264) is fixedly connected to the opposing surfaces of the bracket (261) and the limiting block (263), and spring 2 (264) is sleeved on the outside of the movable rod (262).

3. The portable withstand voltage insulation resistance tester according to claim 2, characterized in that: The fixing components (2) are symmetrically arranged in two sets.

4. A portable withstand voltage insulation resistance tester according to claim 3, characterized in that: A connecting plate (27) is fixedly connected between the two fixing plates (24).

5. A portable withstand voltage insulation resistance tester according to claim 4, characterized in that: The bottom of the fixing plate (24) is provided with an arc-shaped groove (241).

6. A portable withstand voltage insulation resistance tester according to claim 5, characterized in that: The inner wall of the box cover (12) is symmetrically connected with spring three (31), and the end of the spring three (31) away from the box cover (12) is fixedly connected with a protective plate (3). The top of the box body (11) is provided with a placement groove (32), and the placement groove (32) has the same area as the protective plate (3).

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