Auxiliary device for measuring grounding resistance

Abstract

The utility model provides an auxiliary device for ground resistance measurement, which comprises a mounting rack and a winding wheel arranged on the mounting rack, and a central shaft of the winding wheel is rotatably connected with the mounting rack; the mounting frame comprises a lifting frame arranged at the top, a placing frame arranged at the bottom and a middle supporting frame connected with the lifting frame and the placing frame; the end part of the winding wheel is connected with the middle support frame; a first positioning mechanism is arranged at one end of the middle support frame corresponding to the wire; and a second positioning mechanism is arranged at the other end of the placement frame corresponding to the wire. The auxiliary device for ground resistance measurement can be used for wire take-up and pay-off processes in the ground resistance measurement process, when wire connection is not needed, the two ends of a wire can be positioned through the first positioning mechanism and the second positioning mechanism, and the situation that the wire is scattered or the two ends of the wire are damaged due to collision and treading is avoided.

Description

Technical Field

[0001] This utility model relates to an auxiliary device for power detection, specifically, to an auxiliary device for measuring grounding resistance. Background Technology

[0002] Measuring grounding resistance is crucial for ensuring the safe operation of electrical equipment. A grounding resistance tester is an instrument specifically designed for measuring grounding resistance. When using it, first ensure the instrument is placed horizontally and check that the galvanometer pointer is on the center line. Then, set the "multiplier scale" to its maximum, slowly rotate the generator crank handle while simultaneously rotating the "measuring scale dial" until the galvanometer pointer points to the center line. When the galvanometer pointer is close to equilibrium, increase the speed of the generator crank handle and adjust the "measuring scale dial" until the pointer stably points to the center position. The measured grounding resistance value can then be obtained from the dial reading and the multiplier.

[0003] To make the grounding resistance measurement process more convenient, a series of auxiliary devices have been developed to assist in the measurement process. For example, Chinese patent CN213149087U discloses a grounding resistance measurement auxiliary device that facilitates the winding and unwinding of the wire during grounding resistance measurement. However, during the use of this device, after the wire passes through the first and second through holes, the end of the wire is directly connected to the grounding resistance measurement device. When not in use, the wire end is directly exposed to the outside, which not only makes it easy for the wound wire to unravel again, but also easily causes damage to the wire end.

[0004] In order to solve the above problems, people have been seeking an ideal technological solution. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing an auxiliary device for measuring grounding resistance.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An auxiliary device for measuring grounding resistance includes a mounting frame and a reel mounted on the mounting frame, with the central shaft of the reel rotatably connected to the mounting frame. The mounting frame includes a lifting frame at the top, a placement frame at the bottom, and a central support frame connecting the lifting frame and the placement frame. The end of the reel is connected to the central support frame. A first positioning mechanism is provided at one end of the central support frame corresponding to the conductor, and a second positioning mechanism is provided at the other end of the placement frame corresponding to the conductor.

[0008] Both the first and second positioning mechanisms include a positioning cavity, the top of which is constricted and has a through hole for accommodating the end of a wire; several sets of positioning clips are evenly arranged inside the positioning cavity.

[0009] Each set of positioning clips includes several mutually symmetrical elastic plates. The elastic plates are arc-shaped, with the middle part of the elastic plate protruding towards the central axis of the positioning cavity. One end of the elastic plate is fixedly connected to the inner wall of the positioning cavity, and the other end of the elastic plate abuts against the inner wall of the positioning cavity. The maximum distance between any two relatively symmetrical elastic plates is greater than the outer diameter of the wire, and the minimum distance is less than the outer diameter of the wire.

[0010] The winding reel includes a central drum, a central shaft coaxially arranged with the central drum, a first limiting plate located at one end of the central drum, and a second limiting plate located at the other end of the central drum; the first limiting plate is located near the central support frame; and a rotating handle is provided on the outer side of the second limiting plate.

[0011] The carrying rack and the placement rack each include a columnar connecting rod, which is bent into a U-shaped structure. The two ends of the carrying rack are connected to the upper side of the central support frame, and the two ends of the placement rack are connected to the lower side of the central support frame.

[0012] The two legs of the U-shaped structure of the carrying rack are bent horizontally towards the upper side of the winding reel, and the bottom edge of the U-shaped structure is close to the upper middle part of the central drum; the two legs of the U-shaped structure of the placement rack are bent horizontally towards the lower side of the winding reel, and the bottom edge of the U-shaped structure is close to the lower side of the second limiting plate.

[0013] Several anti-slip sleeves are evenly arranged on the columnar connecting rod of the placement rack, and the outer surface of the anti-slip sleeves is provided with anti-slip serrations.

[0014] The first positioning mechanism is vertically set and fixedly connected to the central support frame; the second positioning mechanism is horizontally set, and the bottom edge of the U-shaped structure of the placement frame is provided with a mounting seat corresponding to the second positioning mechanism.

[0015] The central support frame includes a fixed base, a central shaft rotatably connected to the fixed base, and a cavity inside the fixed base. A ratchet is connected to the part of the central shaft inside the fixed base. A positioning shaft is provided inside the fixed base corresponding to the ratchet. The positioning shaft is rotatably connected to the fixed base. A pawl is connected to one end of the positioning shaft inside the cavity of the fixed base, and the other end of the positioning shaft extends out of the outside of the fixed base and is connected to an operating knob.

[0016] Compared with the prior art, the present invention has the following advantages: the present invention provides an auxiliary device for measuring grounding resistance, which can be used in the process of winding and unwinding the wire during the grounding resistance measurement process. During the winding and unwinding process, the operator can rotate the winding wheel to wind or unwind the wire. When the wire connection is not required, the two ends of the wire can be positioned by the first positioning mechanism and the second positioning mechanism to avoid the wire from becoming tangled or being damaged by bumps or trampling. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model (I).

[0018] Figure 2 This is a schematic diagram of the structure of this utility model (II).

[0019] Figure 3 This is a cross-sectional structural diagram of the first positioning mechanism in this utility model.

[0020] In the diagram: 1. Lifting rack; 2. Placement rack; 3. Central support frame; 4. First limiting plate; 5. Second limiting plate; 6. Rotating handle; 7. First positioning mechanism; 8. Second positioning mechanism; 9. Anti-slip sleeve; 10. Positioning cavity; 11. Through hole; 12. Positioning clip. Detailed Implementation

[0021] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. "Installed," "equipped with," and "connected" can employ conventional means in the prior art, such as integral installation, snap-fit ​​installation, welding connection, adhesive connection, bolted connection, etc. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances and select suitable connection, setting, or installation methods from the existing technology.

[0023] like Figure 1-3 As shown, an auxiliary device for measuring grounding resistance includes a mounting frame and a winding reel mounted on the mounting frame. The central shaft of the winding reel is rotatably connected to the mounting frame. The mounting frame includes a lifting frame 1 at the top, a placement frame 2 at the bottom, and a central support frame 3 connecting the lifting frame 1 and the placement frame 2. The end of the winding reel is connected to the central support frame 3. A first positioning mechanism 7 is provided at one end of the central support frame corresponding to the conductor, and a second positioning mechanism 8 is provided at the other end of the placement frame 2 corresponding to the conductor.

[0024] This auxiliary device for measuring grounding resistance can be used for the winding and unwinding of the conductor during the grounding resistance measurement process. During the winding and unwinding process, the operator can rotate the winding reel to wind up or unwind the conductor. When conductor connection is not required, the two ends of the conductor can be positioned by the first positioning mechanism and the second positioning mechanism to prevent the conductor from becoming tangled or damaged by bumps or trampling.

[0025] In one embodiment, both the first positioning mechanism 7 and the second positioning mechanism 8 include a positioning cavity 10. The top of the positioning cavity 10 is constricted and has a through hole 11 for accommodating the end of a wire. Several sets of positioning clips 12 are evenly arranged inside the positioning cavity 10. When the wire is not used for connection, the end of the wire can be inserted into the positioning cavity and extended into the gap between the positioning clips, and clamped and positioned by the positioning clips. Specifically, the positioning clips can be made of common materials such as metal sheets or plastic sheets.

[0026] In one embodiment, each set of positioning clips 12 includes several mutually symmetrical elastic plates. The elastic plates are arc-shaped, with the middle part of the elastic plate protruding towards the central axis of the positioning cavity 10. One end of the elastic plate is fixedly connected to the inner wall of the positioning cavity 10, and the other end of the elastic plate abuts against the inner wall of the positioning cavity 10. The maximum distance between any two relatively symmetrical elastic plates is greater than the outer diameter of the wire, and the minimum distance is less than the outer diameter of the wire, which facilitates clamping the wire.

[0027] In one embodiment, the winding reel includes a central drum, a central shaft coaxially arranged with the central drum, a first limiting plate 4 disposed at one end of the central drum, and a second limiting plate 5 disposed at the other end of the central drum; the first limiting plate 4 is located near the central support frame 3; a rotating handle 6 is disposed on the outer side of the second limiting plate 5. Specifically, the rotating handle can be fixed at an eccentric position on the second limiting plate, allowing the operator to hold the rotating handle and rotate the winding reel during the winding and unwinding process.

[0028] In one embodiment, the lifting frame 1 and the placement frame 2 each include a columnar connecting rod, which is bent into a U-shaped structure. The two ends of the lifting frame 1 are connected to the upper side of the middle support frame 3, and the two ends of the placement frame 2 are connected to the lower side of the middle support frame 3.

[0029] In one embodiment, the two legs of the U-shaped structure of the lifting frame 1 are bent horizontally towards the upper side of the winding reel, and the bottom edge of the U-shaped structure is close to the upper middle part of the central drum, which facilitates lifting and moving; the two legs of the U-shaped structure of the placement frame 2 are bent horizontally towards the lower side of the winding reel, and the bottom edge of the U-shaped structure is close to the lower side of the second limiting plate 5, which facilitates the support of the winding reel when placed on a plane (e.g., the ground).

[0030] In one embodiment, a plurality of anti-slip sleeves 9 are evenly arranged on the cylindrical connecting rod of the placement frame 2. The outer surface of the anti-slip sleeves 9 is provided with anti-slip serrations to prevent slipping. Specifically, the anti-slip sleeves can be made of common materials such as rubber or plastic.

[0031] In one embodiment, the first positioning mechanism 7 is vertically arranged and fixedly connected to the central support frame 3; the second positioning mechanism 8 is horizontally arranged, and the bottom edge of the U-shaped structure of the placement frame 2 is provided with a mounting seat corresponding to the second positioning mechanism 8.

[0032] In one embodiment, the central support frame 3 includes a fixed base, a central shaft rotatably connected to the fixed base, and a cavity inside the fixed base. A ratchet is connected to the portion of the central shaft inside the fixed base. A positioning shaft is provided inside the fixed base corresponding to the ratchet, and the positioning shaft is rotatably connected to the fixed base. A pawl is connected to one end of the positioning shaft inside the cavity of the fixed base, and the other end of the positioning shaft extends out of the outside of the fixed base and is connected to an operating knob. After the winding and unwinding are completed, the operating knob can be rotated to make the pawl lock the ratchet, preventing the winding wheel from rotating arbitrarily. Specifically, the ratchet and pawl can adopt a ratchet and pawl structure commonly used in the prior art.

[0033] The above embodiments can be combined with each other.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. An auxiliary device for ground resistance measurement, characterized by: The mounting rack comprises a carrying rack arranged at the top, a placing rack arranged at the bottom, and a middle support rack connecting the carrying rack and the placing rack; the end of the winding wheel is connected with the middle support rack; the first positioning mechanism is arranged at one end of the wire corresponding to the middle support rack, and the second positioning mechanism is arranged at the other end of the wire corresponding to the placing rack.

2. An auxiliary device for ground resistance measurement according to claim 1, characterized in that: The first positioning mechanism and the second positioning mechanism each comprise a positioning cavity, the top of the positioning cavity is narrowed and a through hole for accommodating the end of the wire is arranged; the inside of the positioning cavity is uniformly provided with a plurality of groups of positioning clamping pieces.

3. An auxiliary device for ground resistance measurements according to claim 2, characterized in that: Each group of the positioning clamping pieces comprises a plurality of mutually symmetrical elastic pieces, the elastic pieces are in an arc shape, the middle part of the elastic pieces protrudes towards the center axis of the positioning cavity, one end of the elastic pieces is fixedly connected with the inner wall of the positioning cavity, the other end of the elastic pieces abuts against the inner wall of the positioning cavity, the maximum distance between any two symmetrical elastic pieces is greater than the outer diameter of the wire, and the minimum distance is less than the outer diameter of the wire.

4. An auxiliary device for ground resistance measurements according to claim 3, characterized in that: The winding wheel comprises a center winding drum, a center shaft coaxially arranged with the center winding drum, a first limiting plate arranged at one end of the center winding drum, and a second limiting plate arranged at the other end of the center winding drum; the first limiting plate is close to the middle support rack; the outer side of the second limiting plate is provided with a rotating handle.

5. An auxiliary device for ground resistance measurements according to claim 4, characterized in that: The carrying rack and the placing rack each comprise a column-shaped connecting rod, the column-shaped connecting rod is bent into a U-shaped structure, the two ends of the carrying rack are correspondingly connected to the upper side of the middle support rack, and the two ends of the placing rack are correspondingly connected to the lower side of the middle support rack.

6. An auxiliary device for ground resistance measurements according to claim 5, characterized in that: The two legs of the U-shaped structure of the carrying rack are horizontally bent towards the upper side of the winding wheel, and the bottom edge of the U-shaped structure is close to the middle upper side of the center winding drum; the two legs of the U-shaped structure of the placing rack are horizontally bent towards the lower side of the winding wheel, and the bottom edge of the U-shaped structure is close to the lower side of the second limiting plate.

7. An auxiliary device for ground resistance measurements according to claim 6, characterized in that: A plurality of anti-skid sleeves are uniformly arranged on the column-shaped connecting rod of the placing rack, and the outer surface of the anti-skid sleeve is provided with anti-skid serrations.

8. An auxiliary device for ground resistance measurements according to claim 7, characterized in that: The first positioning mechanism is vertically arranged and fixedly connected with the middle support rack; the second positioning mechanism is horizontally arranged, and the bottom edge of the U-shaped structure of the placing rack is provided with a mounting seat corresponding to the second positioning mechanism.

9. An auxiliary device for ground resistance measurements according to claim 8, characterized in that: The middle support rack comprises a fixed seat, the center shaft is rotationally connected with the fixed seat, the inside of the fixed seat is provided with a cavity, and the part of the center shaft located in the inside of the fixed seat is connected with a ratchet wheel; the inside of the fixed seat is provided with a positioning shaft corresponding to the ratchet wheel, the positioning shaft is rotationally connected with the fixed seat, one end of the positioning shaft located in the inside of the fixed seat is connected with a pawl, and the other end of the positioning shaft extends out of the outside of the fixed seat and is connected with an operation knob.

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