An insulating grounding resistance meter testing device

Abstract

This utility model discloses a grounding resistance meter calibration device, relating to the field of grounding resistance meter technology. It includes a chassis, with a calibration instrument body fixedly connected inside the chassis. A display screen is fixedly connected to one side of the calibration instrument body, and a test interface is provided on one side of the display screen. This utility model employs the above structure, using a transmission component installed inside the chassis to move an assembly plate. The assembly plate is tilted, and multiple cooling fans are fixed to the tilted assembly plate. The tilted cooling fans change the airflow direction, forming an angled airflow that better removes heat. The cooling fans move on both sides of the calibration instrument body inside the chassis, expanding the heat dissipation coverage, preventing localized heat accumulation inside the chassis, allowing heat to be dissipated more efficiently, effectively reducing the overall temperature inside the chassis, slowing down the aging of electronic components, and ensuring the long-term stable operation of the grounding resistance meter calibration instrument.

Description

Technical Field

[0001] This utility model belongs to the technical field of grounding resistance meters, and specifically relates to a calibration device for an insulation grounding resistance meter. Background Technology

[0002] With the rapid development of the power industry, the construction scale of projects such as smart grids and ultra-high voltage power transmission is constantly expanding, and the safety requirements for the grounding system of electrical equipment are becoming increasingly stringent. The insulation grounding resistance meter calibration device is a special equipment used to calibrate, test and verify whether the performance indicators of the insulation grounding resistance meter meet the relevant standards and specifications.

[0003] Currently, during the operation of the ground resistance meter calibrator, the high-frequency current conversion and precise calculation of the internal electronic components continuously generate a large amount of heat. Due to the relatively enclosed space inside the chassis and the limitations of the heat dissipation channel design, the heat is difficult to dissipate through natural convection and will continue to accumulate inside the chassis, causing the internal temperature to rise continuously. This not only accelerates the aging of electronic components and reduces the service life of the instrument, but may also cause circuit failures, seriously affecting the measurement accuracy of the ground resistance meter calibrator. Utility Model Content

[0004] In view of the problems mentioned in the background art, the purpose of this utility model is to provide an insulation grounding resistance meter calibration device to solve the problems in the background art.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] An insulation grounding resistance meter calibration device includes a chassis. A calibration instrument body is fixedly connected inside the chassis. A display screen is fixedly connected to one side of the calibration instrument body. A test interface is provided on one side of the calibration instrument body located on the display screen. A knob is rotatably connected to the other side of the calibration instrument body located on the display screen. A drive assembly is provided on one side of the chassis. Transmission components are provided on both sides of the chassis via the drive assembly. An assembly plate is provided on one side of the transmission component, and the assembly plate is inclined. A cooling fan is installed on one side of the assembly plate. A temperature sensor is fixedly connected to the side of the chassis away from the calibration instrument body.

[0007] As a preferred technical solution, the drive assembly includes a motor, which is fixedly connected to the outside of the chassis. Inside the chassis, a drive rod is rotatably connected to the left side of the calibrator body. Worms are fixedly connected to both sides of the drive rod. A worm gear is meshed with one side of the worm and is located on one side of the transmission assembly. A pinion is fixedly connected to the output end of the motor. A large gear is meshed with one side of the pinion and is fixedly connected to one side of the drive rod.

[0008] As a preferred technical solution, the transmission assembly includes a transmission lead screw, which is rotatably connected to both sides of the calibration instrument body inside the housing via bearings. One side of the transmission lead screw is fixedly connected to one side of the worm gear. A transmission seat is threadedly connected to the outer surface of the transmission lead screw. A connecting rod is fixedly connected to one side of the transmission seat. The side of the connecting rod away from the transmission seat is fixedly connected to one side of the assembly plate.

[0009] As a preferred technical solution, limit grooves are provided on both sides of the inside of the chassis, and limit blocks are slidably connected inside the limit grooves. One side of the limit block is fixedly connected to one side of the assembly plate.

[0010] As a preferred technical solution, support plates are fixedly connected to both sides of the bottom end of the tester body, and air guide holes are opened inside the support plates.

[0011] As a preferred technical solution, the chassis has a heat dissipation window on the side away from the cooling fan, and a protective mesh is fixedly connected inside the heat dissipation window.

[0012] In summary, the present invention has the following main advantages:

[0013] First, this utility model, by installing a transmission component inside the chassis, drives the assembly plate to move. The assembly plate is set at an angle, and multiple cooling fans are fixed on the inclined assembly plate. The inclined cooling fans change the airflow direction and form an angled airflow that can better remove heat. The cooling fans move on both sides of the tester body inside the chassis, expanding the heat dissipation coverage, avoiding local heat accumulation inside the chassis, allowing heat to be discharged more efficiently, effectively reducing the overall temperature inside the chassis, slowing down the aging speed of electronic components, and ensuring the long-term stable operation of the grounding resistance meter tester.

[0014] Secondly, this utility model, by installing a drive component on the chassis, can drive two transmission components to work, thereby driving the cooling fans on both sides of the chassis to move simultaneously, eliminating the need for multiple drive components and reducing energy consumption. Attached Figure Description

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

[0016] Figure 2 This is a schematic diagram of the internal structure of the chassis of this utility model;

[0017] Figure 3 This is a schematic diagram of one side of the chassis structure of this utility model;

[0018] Figure 4 This is a utility model Figure 2 A magnified structural diagram at point A;

[0019] Figure 5 This is a utility model Figure 2 A magnified structural diagram at point B.

[0020] Reference numerals: 1. Chassis; 2. Calibrator body; 3. Knob; 4. Test interface; 5. Display screen; 6. Assembly plate; 7. Cooling fan; 8. Transmission assembly; 81. Transmission screw; 82. Transmission seat; 83. Connecting rod; 9. Drive assembly; 91. Motor; 92. Pinion; 93. Gear; 94. Drive rod; 95. Worm gear; 96. Worm wheel; 10. Limiting groove; 11. Limiting block; 12. Temperature sensor; 13. Support plate; 14. Air vent; 15. Heat dissipation window; 16. Protective net. Detailed Implementation

[0021] Example

[0022] refer to Figures 1 to 5 This embodiment describes an insulation grounding resistance meter calibration device, comprising a chassis 1, with a calibration instrument body 2 fixedly connected inside the chassis 1. The calibration instrument body 2 includes a resistance module, a control module, a data processing and storage module, and a power management module. The power management module provides stable power to the entire calibration instrument body 2, ensuring the normal operation of each module. When grounding resistance testing is performed, the resistance module generates a standard resistance signal, providing reference data for the calibration work. The control module precisely adjusts the resistance module to generate the corresponding standard resistance signal according to the instructions input by the operator through the knob 3, and controls the test interface 4 to connect with the grounding resistance meter under test, initiating the testing process. During the testing process, the measurement data of the meter under test is transmitted to the data processing and storage module. This module analyzes and calculates the data, compares it with the standard data provided by the resistance module, obtains the calibration result, and stores the result for easy subsequent retrieval. The cooperation method of the above modules is a mature feature of existing grounding resistance meter calibration instrument bodies 2. The specific structural principle of the instrument has been widely applied and fully verified in related technical fields, and will not be repeated here. A display screen 5 is fixedly connected to one side of the instrument body 2. A test interface 4 is opened on one side of the instrument body 2 located on the display screen 5. A knob 3 is rotatably connected to the other side of the instrument body 2 located on the display screen 5. A drive assembly 9 is provided on one side of the chassis 1. Both sides of the interior of the chassis 1 are provided with transmission assemblies 8 through the drive assembly 9. An assembly plate 6 is provided on one side of the transmission assembly 8, and the assembly plate 6 is inclined. A cooling fan 7 is installed on one side of the assembly plate 6. Since the assembly plate 6 is inclined, the cooling fan 7 is also inclined. The direction of airflow of the inclined cooling fan 7 forms a certain angle with the direction of airflow inside the chassis 1, which can better agitate the air inside the chassis 1, promote air convection circulation, and make it easier for hot air to be discharged from the chassis 1. A temperature sensor 12 is fixedly connected to the side of the chassis 1 away from the instrument body 2.

[0023] refer to Figure 1 and Figure 4 The drive assembly 9 includes a motor 91, which is fixedly connected to the outside of the housing 1. Inside the housing 1, on the left side of the calibration instrument body 2, a drive rod 94 is rotatably connected. Worms 95 are fixedly connected to both sides of the drive rod 94. A worm wheel 96 is meshed with one side of the worm 95 and is located on one side of the transmission assembly 8. A pinion 92 is fixedly connected to the output end of the motor 91. A large gear 93 is meshed with one side of the pinion 92 and is fixedly connected to one side of the drive rod 94. By setting up the drive assembly 9, when the transmission assembly 8 needs to be driven, the motor 91 drives the pinion 92 to rotate. The rotation of the pinion 92 drives the large gear 93 to rotate, reducing the speed of the large gear 93 to ensure the stable operation of the transmission assembly 8. The large gear 93 drives the drive rod 94 to rotate, and the worms 95 on both sides of the drive rod 94 rotate accordingly. The worms 95 then drive the worm wheels 96 meshing with them to rotate, thus driving the transmission assembly 8 to work.

[0024] refer to Figure 5 The transmission assembly 8 includes a transmission screw 81, which is rotatably connected to both sides of the calibration instrument body 2 inside the housing 1 via bearings. One side of the transmission screw 81 is fixedly connected to one side of the worm gear 96. A transmission seat 82 is threaded onto the outer surface of the transmission screw 81. A connecting rod 83 is fixedly connected to one side of the transmission seat 82. The side of the connecting rod 83 away from the transmission seat 82 is fixedly connected to one side of the mounting plate 6. Limiting grooves 10 are formed on both sides of the interior of the housing 1. The internal sliding connection of the 0 is limited by a limiting block 11, one side of which is fixedly connected to one side of the assembly plate 6. By setting the transmission assembly 8, after the worm gear 95 rotates, it drives the transmission screw 81 to rotate. Under the action of the rotation of the transmission screw 81, and simultaneously under the action of the limiting block 11 and the limiting groove 10, the transmission seat 82 will move linearly along the axial direction of the transmission screw 81, which can drive the cooling fan 7 to move and change the heat dissipation position, so as to facilitate the heat dissipation of the calibration instrument body 2, reduce the failure rate caused by high temperature, and reduce maintenance costs.

[0025] refer to Figure 3 The bottom two sides of the instrument body 2 are fixedly connected to support plates 13, and the support plates 13 have air guide holes 14 inside. By setting the support plates 13 and the air guide holes 14, the air blown out by the cooling fan 7 will flow through the air guide holes 14 inside the support plates 13 during the operation of the instrument body 2, so as to take away the heat generated inside the instrument body 2.

[0026] refer to Figure 2-3The chassis 1 has a heat dissipation window 15 on the side away from the cooling fan 7, and a protective net 16 is fixedly connected inside the heat dissipation window 15. By setting the heat dissipation window 15, some heat can be discharged to the outside of the chassis 1 through the heat dissipation window 15, realizing the exchange of air inside and outside the chassis 1. The protective net 16 can prevent foreign objects from entering the inside of the chassis 1 through the heat dissipation window 15, protecting the safety of the internal components.

[0027] Operating principle and advantages: Before use, connect the grounding resistance meter to be tested to the test interface 4 of the calibration instrument body 2, and input the test command through the knob 3. At this time, the power management module provides stable power to the resistance module, control module, and data processing and storage module of the calibration instrument body 2, and each module is in standby state. The temperature sensor 12 inside the chassis 1 monitors the initial temperature inside the chassis 1 in real time. When the temperature sensor 12 detects that the temperature inside the chassis 1 has risen to the set threshold, the motor 91 drives the pinion 92 to rotate, the pinion 92 drives the large gear 93 to rotate, the large gear 93 drives the drive rod 94 to rotate, and the worm gears 95 on both sides of the drive rod 94 rotate accordingly. The worm gears 95 then drive the meshing worm gears to rotate. When the worm gear 96 rotates, it drives the transmission screw 81 to rotate. Under the guidance of the limit block 11 and the limit groove 10, the transmission seat 82 moves linearly along the axis of the transmission screw 81, thereby driving the inclined assembly plate 6 and the cooling fan 7 to move. The direction of the inclined cooling fan 7 forms an angle with the direction of air flow inside the chassis 1, stirring the air inside the chassis 1 and promoting convection circulation. During this process, the air blown out by the cooling fan 7 will also flow through the air guide hole 14 inside the support plate 13 at the bottom of the tester body 2, thus effectively reducing the overall temperature inside the chassis 1, slowing down the aging speed of electronic components, and ensuring the long-term stable operation of the grounding resistance meter tester.

Claims

1. An insulation resistance resistance meter verification device comprising a cabinet (1), characterized in that: The inside of the chassis (1) is fixedly connected to the calibrator body (2). A display screen (5) is fixedly connected to one side of the calibrator body (2). The calibrator body (2) has a test interface (4) on one side of the display screen (5). The calibrator body (2) has a knob (3) rotatably connected to the other side of the display screen (5). A drive assembly (9) is provided on one side of the chassis (1). Both sides of the inside of the chassis (1) are provided with transmission assemblies (8) through the drive assembly (9). An assembly plate (6) is provided on one side of the transmission assembly (8), and the assembly plate (6) is inclined. A cooling fan (7) is installed on one side of the assembly plate (6). A temperature sensor (12) is fixedly connected to the side of the chassis (1) away from the calibrator body (2).

2. The insulation resistance resistance meter calibrating device according to claim 1, characterized in that: The drive assembly (9) includes a motor (91), which is fixedly connected to the outside of the housing (1). Inside the housing (1), a drive rod (94) is rotatably connected to the left side of the tester body (2). Worms (95) are fixedly connected to both sides of the drive rod (94). A worm wheel (96) is meshed with one side of the worm (95). The worm wheel (96) is located on one side of the transmission assembly (8).

3. The device for calibrating the insulation resistance resistance meter according to claim 2, characterized in that: A small gear (92) is fixedly connected to the output end of the motor (91), and a large gear (93) is meshed with one side of the small gear (92). One side of the large gear (93) is fixedly connected to one side of the drive rod (94).

4. The device for calibrating the insulation resistance resistance meter according to claim 2, characterized in that: The transmission assembly (8) includes a transmission screw (81), which is rotatably connected to both sides of the tester body (2) inside the housing (1) via bearings. One side of the transmission screw (81) is fixedly connected to one side of the worm gear (96). The outer surface of the transmission screw (81) is threadedly connected to a transmission seat (82). One side of the transmission seat (82) is fixedly connected to a connecting rod (83). The side of the connecting rod (83) away from the transmission seat (82) is fixedly connected to one side of the mounting plate (6).

5. The device for calibrating the insulation resistance resistance meter according to claim 1, characterized in that: The chassis (1) has limit grooves (10) on both sides inside. Limit blocks (11) are slidably connected inside the limit grooves (10). One side of the limit block (11) is fixedly connected to one side of the assembly plate (6).

6. The device for calibrating the insulation resistance resistance meter according to claim 1, characterized in that: Both sides of the bottom end of the test instrument body (2) are fixedly connected to support plates (13), and air guide holes (14) are opened inside the support plates (13).

7. The device for calibrating the insulation resistance resistance meter according to claim 1, characterized in that: The chassis (1) has a heat dissipation window (15) on the side away from the cooling fan (7), and a protective net (16) is fixedly connected inside the heat dissipation window (15).

Images