CN110519966B

CN110519966B - Grounding resistance measuring tool

Info

Publication number: CN110519966B
Application number: CN201910726513.3A
Authority: CN
Inventors: 王飞; 魏丛亮; 郑家巧; 周克俊; 王惠
Original assignee: Nanjing Ningpu Lighting Protection Technology Co ltd
Current assignee: NANJING NINGPU LIGHTING PROTECTION TECHNOLOGY Co.,Ltd.
Priority date: 2019-08-07
Filing date: 2019-08-07
Publication date: 2020-09-11
Anticipated expiration: 2039-08-07
Also published as: CN110519966A

Abstract

The invention relates to the technical field of a ground resistance measuring instrument and discloses a ground resistance measuring tool which comprises a box body, wherein a fixed platform is fixedly arranged at the top of an inner cavity of the box body, a main board is fixedly arranged at the top of the fixed platform, a heat dissipation port is formed in the bottom of the fixed platform, which is positioned on the left side of a cavity of the box body, and a fixing device is fixedly arranged in the middle of the heat dissipation port. This ground resistance measuring tool, be provided with heat dissipation mechanism and air intake through the bottom at the mainboard, rotation through heat dissipation mechanism flabellum, drive the inside hot-air outgoing box of box, and fresh cold air continues to enter into the box from the air intake inside, the heat on the mainboard can be taken away to the cold air and discharges through the thermovent, thereby primary air circulation has been accomplished, can make the inside hot-air of box discharge that can be timely through such cold air circulation, thereby make the inside temperature of box keep the constant temperature, make the working property of components and parts can not decline.

Description

Grounding resistance measuring tool

Technical Field

The invention relates to the technical field of a grounding resistance measuring instrument, in particular to a grounding resistance measuring tool.

Background

The ground resistance tester is a novel digital ground resistance tester which abandons the traditional manual hand-operated power generation working mode, adopts an advanced large-scale integrated circuit and combines the three-terminal button and four-terminal button measuring modes into one model by applying a DC/AC conversion technology.

Current ground resistance tester is generally placed measuring instrument in the box, then open the case when using and can use, but certain drawback exists to the using-way like this, for example the box is sealed, and gap between the panel of instrument and the box opening is smaller again, this just leads to components and parts release a large amount of heats in work under the mainboard very easily, thereby can lead to the heat loss of components and parts, make the life of components and parts shorten, the lid of current box is opened for rolling over in addition, the mainboard of opening back instrument can all be opened, the inside that leads to the box when measuring very easily intakes, thereby lead to the condition that the inside components and parts of box can take place the short circuit, and then influence measuring tool's safety in utilization.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a grounding resistance measuring tool, which has the advantages that the working performance of components can be ensured in time by radiating heat in a box body, and the use safety of an instrument can be ensured by preventing rainwater from entering the box body through an integrally-lifted top cover, and solves the problems that the working temperature of the components in the box body is too high and the working performance of the components is influenced because the heat radiation in the box body is poor in the use process of the traditional grounding resistance tester.

The invention provides the following technical scheme: the ground resistance measuring tool comprises a box body, wherein a fixed platform is fixedly mounted at the top of an inner cavity of the box body, a main board is fixedly mounted at the top of the fixed platform, a heat dissipation port is formed in the bottom of the fixed platform and positioned on the left side of a cavity of the box body, a fixing device is fixedly mounted in the middle of the heat dissipation port, a motor is fixedly mounted in the middle of the fixing device, fan blades are fixedly mounted on an output shaft of the motor, an air inlet is formed in a cavity on the right side of the box body, a dustproof decorative board is fixedly mounted at the outer edge of the cavity of the box body near the air inlet, a buckle is fixedly mounted at the outer edge of the cavity of the box body near the fixed platform, a first folding mechanism is fixedly mounted at the top of the left side of the fixed platform, a second folding, the utility model discloses a folding culvert, including top cap, fixed platform, movable mechanism, fixed platform, movable culvert and movable culvert, the spacing recess has.

Preferably, the middle part of the fixed platform is of a hollow structure.

Preferably, the motor is electrically connected to a power source through a wire.

Preferably, the number of buckles is four, and four buckles respectively symmetric distribution in four positions of box, the buckle is made for rigid plastic.

Preferably, the limiting groove is positioned on the left above the movable culvert.

Compared with the prior art, the invention has the following beneficial effects:

1. this ground resistance measuring tool, be provided with heat dissipation mechanism and air intake through the bottom at the mainboard, rotation through heat dissipation mechanism flabellum, drive the inside hot-air outgoing box of box, and fresh cold air continues to enter into the box from the air intake inside, the heat on the mainboard can be taken away to the cold air and discharges through the thermovent, thereby primary air circulation has been accomplished, can make the inside hot-air of box discharge that can be timely through such cold air circulation, thereby make the inside temperature of box keep the constant temperature, make the working property of components and parts can not decline.

2. This ground resistance measuring tool, through being provided with folding lift top cap, the both sides of this top cap all are provided with foldable fixed knot and construct, can rise the top cap and fix, thereby make the top cap keep residing directly over the box, make the device also can carry out normal work in rainwater weather, be located the inside that the brim of a hat around the top cap can effectually prevent that the rainwater from flowing into the box, and this foldable fixed knot constructs can vacate abundant space and operate to the instrument, can not hinder normal measuring operation.

Drawings

FIG. 1 is a front view in half section of the present invention;

FIG. 2 is a schematic view of the folding mechanism of the present invention;

FIG. 3 is a right side perspective view of the folding mechanism of the present invention;

fig. 4 is a perspective left view of the folding mechanism of the present invention.

In the figure: 1. a box body; 2. a fixed platform; 3. a main board; 4. a heat dissipation port; 5. a fixing device; 6. a motor; 7. a fan blade; 8. an air inlet; 9. a dustproof decorative plate; 10. buckling; 11. a first folding mechanism; 12. a second folding mechanism; 13. a top cover; 14. a brim; 15. a third folding mechanism; 16. fixing the card; 17. a movable card; 18. a limiting bulge; 19. a movable culvert; 20. and a limiting groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, a ground resistance measuring tool includes a box 1, a fixing platform 2 is fixedly installed on the top of an inner cavity of the box 1, the middle of the fixing platform 2 is a hollow structure, the hollow structure can meet the effect of placing components at the bottom of a main board, and the heat dissipation effect of circulating cold air on the main board 3 can be better through the hollow structure, the main board 3 is fixedly installed on the top of the fixing platform 2, a heat dissipating port 4 is formed on the left side of the cavity of the box 1 at the bottom of the fixing platform 2, a fixing device 5 is fixedly installed in the middle of the heat dissipating port 4, a motor 6 is fixedly installed in the middle of the fixing device 5, the motor 6 is electrically connected with a power supply through an electric wire, through the electrical connection between the motor 6 and the power supply, the power supply can provide continuous power supply for the motor 6, so, the fan blades 7 are fixedly installed on an output shaft of the motor 6, an air inlet 8 is formed in a cavity on the right side of the box body 1, dustproof decorative plates 9 are fixedly installed on the outer edges, located in the cavity of the box body 1, of the air inlet 8, four buckles 10 are fixedly installed on the outer edge, located in the cavity of the box body 1, of the fixing platform 2, the four buckles 10 are four in number and symmetrically distributed in four positions of the box body 1 respectively, the buckles 10 are made of hard plastics, the four buckles 10 are located on the periphery of the box body 1 respectively and are fixed to a cap edge 14 of the top cover 13 through the arrangement of the four buckles 10, connection between the box body 1 and the top cover 13 can be achieved, the buckles 10 can be bent and fixed due to the materials, a first folding mechanism 11 is fixedly installed on the top of the left side of the fixing platform 2, fixing clamps 16 are arranged at the top end and the bottom end, the four mechanisms can be symmetrically fixed on the top cover 13 through the arrangement of the first folding mechanism 11, the second folding mechanism 12 and the third folding mechanism 15, so that the top cover 13 is more stably fixed, the four mechanisms are all provided with fixing clips 16 to be connected with the box body 1 and the top cover 13, so that the top cover 13 can perform ascending and descending movement on the top of the box body 1, the second folding mechanism 12 is fixedly arranged at the top of the right side of the fixed platform 2, the top covers 13 are fixedly arranged at the top ends of the first folding mechanism 11 and the second folding mechanism 12, cap edges 14 are arranged around the top covers 13, the third folding mechanism 15 is fixedly arranged at the back of the first folding mechanism 11 at the top of the left side of the fixed platform 2, the fixing clips 16 are fixedly arranged at the side of the first folding mechanism 11, the movable clips 17 are fixedly arranged at the inner side of the bottom of the first folding mechanism 11, and a limiting protrusion 18 is fixedly arranged, the movable culvert 19 is arranged on the outer side of the top of the first folding mechanism 11, the limiting groove 20 is arranged near the movable culvert 19, the limiting groove 20 is positioned on the left side above the movable culvert 19, and through the arrangement, when the limiting protrusion 18 slides into the limiting groove 20, the two sections of the first folding mechanisms 11 are not in a completely vertical state but have certain bending degree, so that the first folding mechanisms 11 have directivity when descending, and the descending directions of the two first folding mechanisms 11 are not inconsistent.

The operating principle, when this device work, at first outwards detain four buckles 10, make buckle 10 can break away from brim of a hat 14 of top cap 13, make top cap 13 and box 1 can separate, then upwards promote top cap 13, make two sections of first folding mechanism 11 can rotate around activity card 17, fix when spacing arch 18 moves inside spacing recess 20, thereby make top cap 13 be located box 1 directly over, when the instrument begins to work, motor 6 drives flabellum 7 and rotates, can take away the inside heat of box 1 from thermovent 4 through the rotation of flabellum 7 and discharge, fresh cold air enters into the inside of box 1 from air intake 8 afterwards and circulates, can.

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

Claims

1. Ground resistance measuring tool, including box (1), its characterized in that: the top fixed mounting of box (1) inner chamber has fixed platform (2), the top fixed mounting of fixed platform (2) has mainboard (3), fixed platform's (2) bottom is located the left side of box (1) cavity and has seted up thermovent (4), the middle part fixed mounting of thermovent (4) has fixing device (5), the middle part fixed mounting of fixing device (5) has motor (6), the output shaft fixed mounting of motor (6) has flabellum (7), air intake (8) have been seted up to the cavity on box (1) right side, the outer fringe fixed mounting that is located box (1) cavity near air intake (8) has dustproof decorative board (9), the outer edge fixed mounting that is located box (1) cavity near fixed platform (2) has buckle (10), the left top fixed mounting of fixed platform (2) has first folding mechanism (11), fixed platform (2) right side top fixed mounting have second folding mechanism (12), the top fixed mounting of first folding mechanism (11) and second folding mechanism (12) has top cap (13), be equipped with brim of a hat (14) all around of top cap (13), the back fixed mounting that fixed platform (2) left top is located first folding mechanism (11) has third folding mechanism (15), the side fixed mounting of first folding mechanism (11) has fixing clip (16), the inboard fixed mounting of first folding mechanism (11) bottom has activity card (17), the top fixed mounting of activity card (17) has spacing arch (18), movable culvert (19) have been seted up in the outside at first folding mechanism (11) top, spacing recess (20) have been seted up in near of activity culvert (19), the top and the bottom of first folding mechanism (11) all are equipped with fixing clip (16) respectively with top cap (13) and case The body (1) is fixedly installed.

2. The earth resistance measuring tool of claim 1, wherein: the middle part of the fixed platform (2) is of a hollow structure.

3. The earth resistance measuring tool of claim 1, wherein: the motor (6) is electrically connected with a power supply through an electric wire.

4. The earth resistance measuring tool of claim 1, wherein: the number of buckle (10) is four, and four buckle (10) respectively symmetric distribution in four positions of box (1), buckle (10) are made for rigid plastic.

5. The earth resistance measuring tool of claim 1, wherein: the limiting groove (20) is positioned on the left above the movable culvert (19).