CN221765594U - Multi-branch insulation resistance automatic tester - Google Patents

Abstract

The utility model discloses a multi-branch insulation resistance automatic tester, which relates to the technical field of power measurement, and includes: a shell and a cover, the sides of the shell and the cover are connected by hinges; a mounting base plate, a power module, a wiring board, a control board and a panel are arranged inside the shell; the power module includes a transformer and a battery, and the battery is connected to the mounting base plate through a battery mounting seat; a support column is arranged on the mounting base plate, and the wiring board and the control board are connected to the mounting base plate through the support column, a panel mounting groove is arranged on the inner side of the shell, and the panel is arranged on the upper side of the control board and connected through the panel mounting groove; a display screen mounting hole for installing a display screen, a wiring terminal hole for installing a wiring terminal, and a switch hole for installing a switch button are arranged on the panel; the wiring terminal, the display screen and the switch button are connected to the control board through the wiring board. The utility model controls a relay module through a controller to connect multiple test circuits in sequence, has high measurement accuracy, and improves test efficiency.

Description

Multi-branch insulation resistance automatic tester

Technical Field

The utility model relates to the technical field of electric power measurement, in particular to an automatic tester for multi-branch insulation resistance.

Background Art

In the power system, the insulation of electrical equipment is related to the safety of the entire power grid operation. One of the most basic conditions for the normal operation of electrical equipment is the insulation degree of its insulating material, that is, the value of insulation resistance. When exposed to heat and moisture, the insulating material ages, causing the insulation resistance to decrease, which can lead to leakage or short circuit accidents of electrical equipment. In order to avoid accidents, it is required to frequently measure the insulation resistance of various electrical equipment. The tool for measuring the insulation resistance of various electrical equipment is the megohmmeter.

Substations have a wide variety of equipment, a large amount of equipment maintenance, and heavy maintenance work. The insulation resistance measurement of a large number of secondary cables requires repeated operations, which is a large workload. When the number of cable cores increases, the workload of phase-to-phase measurement will increase accordingly. The process is cumbersome, and one person needs to be responsible for recording, while the other person constantly changes the probe position, which is easy to miss. Discharge is required after each insulation resistance measurement, and the probe and clamp need to be frequently changed. The monitoring time is long, the operation is frequent, and the efficiency is low.

The current method of measuring insulation resistance at work sites has the following problems:

1. There are many cable cores, and the probe position needs to be changed frequently, which makes the operation troublesome;

2. Frequently changing the probe position for measurement may easily lead to missed measurements;

3. Each wire core needs to be discharged after each measurement, which is time-consuming and labor-intensive;

4. Continuously doing repetitive work for a long time can easily make people tired.

Utility Model Content

The technical problem to be solved by the utility model is to solve the deficiencies in the prior art and to design a multi-branch insulation resistance automatic tester.

The technical solution adopted by the utility model to solve its technical problems is:

Multi-branch insulation resistance automatic tester, including:

A shell and a cover, wherein the sides of the shell and the cover are connected by hinges;

The housing is internally provided with a mounting base plate, a power module, a wiring board, a control board and a panel;

The power module includes a transformer and a battery, and the battery is connected to the mounting base plate through a battery mounting seat;

The mounting base is provided with a support column, the wiring board and the control board are connected to the mounting base through the support column, the inner side of the housing is provided with a panel mounting groove, the panel is arranged on the upper side of the control board and connected through the panel mounting groove;

The panel is provided with a display screen mounting hole for mounting a display screen, a wiring terminal hole for mounting a wiring terminal, and a switch hole for mounting a switch button;

The wiring terminals, display screen and switch button are connected to the control panel via a wiring board;

A controller, a voltage detection module, a standard resistance module, a relay module and a discharge module are arranged on the control board. The output end of the voltage detection module is connected to the controller. The output end of the controller is connected to the relay control module and the display screen. The standard resistance module is connected to the wiring terminal through a wiring board. The wiring terminal is used to connect the insulation resistance to be measured. The power supply module is also connected to the discharge module.

As a further technical solution of the utility model, the controller adopts a STC89C52 single chip microcomputer.

As a further technical solution of the present invention, a charging interface is provided on the panel.

As a further technical solution of the utility model, a grounding column is also arranged on the panel.

As a further technical solution of the utility model, the shell and the cover are made of aluminum plates, and the surface of the aluminum plates is brushed anodized.

As a further technical solution of the present invention, the thickness of the shell and the cover is 3 mm.

As a further technical solution of the utility model, the mounting base plate and the battery mounting plate are made of epoxy resin plates.

Compared with the prior art, the utility model has the following beneficial effects:

1. The utility model has a closed structure formed by the housing and the cover, and a handle can be provided on the housing for easy carrying; the controller adopts the STC89C52 single-chip microcomputer, and the controller controls the relay module to connect multiple test circuits in sequence, and discharges after all tests are completed. The test process is simple and convenient, and the resistance value of the insulation resistance to be tested is calculated by setting the standard resistance module, the circuit structure is simple, and the measurement accuracy is high.

2. During the test, there is no need to manually plug in additional wires. Just plug in the wiring terminals before the test. Active discharge will be performed after the test is completed, which reduces the test time and improves the test efficiency.

3. In order to ensure the safety of the test, a grounding pole is set on the panel to prevent the casing from being electrified and affecting the operator.

4. The outer shell and cover are made of aluminum plate, which is light in weight, and the surface of the aluminum plate is brushed anodized. The installation base and battery installation plate are made of epoxy resin plate with good insulation.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a split structure diagram of the multi-branch insulation resistance automatic tester proposed by the utility model;

FIG2 is a three-dimensional diagram of the multi-branch insulation resistance automatic tester proposed by the utility model;

FIG3 is a top view of the multi-branch insulation resistance automatic tester proposed by the utility model;

FIG4 is a side view of the multi-branch insulation resistance automatic tester proposed by the utility model;

FIG5 is a control structure diagram of the multi-branch insulation resistance automatic tester proposed by the utility model;

As shown in the figure:

10-housing, 20-power module, 30-wiring board, 40-control board, 50-panel; 60-display screen, 70-wiring terminal, 80-switch button;

101-cover body, 102-installation base plate, 103-panel installation slot, 121-support column;

201-transformer, 202-battery, 221-battery mounting seat, 102-mounting base plate;

501-display screen mounting hole, 502-terminal hole, 503-switch hole, 504-charging port, 505-grounding column;

401-controller, 402-voltage detection module, 403-standard resistance module, 404-relay module.

DETAILED DESCRIPTION

The following describes the specific implementation of the utility model in conjunction with the accompanying drawings and embodiments:

It should be noted that the structures, colors, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present utility model without substantially changing the technical content.

Referring to Fig. 1 to Fig. 5, the multi-branch insulation resistance automatic tester comprises: a housing 10 and a cover 101, wherein the sides of the housing 10 and the cover 101 are connected by hinges; a mounting base 102, a power module 20, a wiring board 30, a control board 40 and a panel 50 are arranged inside the housing 10; the power module 20 comprises a transformer 201 and a battery 202, and the battery 202 is connected to the mounting base 102 via a battery mounting seat 221; a support column 121 is arranged on the mounting base 102, and the wiring board 30 and the control board 40 are connected to the mounting base 102 via a battery mounting seat 221; The control panel 40 is connected to the mounting base plate 102 through the support column 121, the inner side of the housing 10 is provided with a panel mounting groove 103, the panel 103 is arranged on the upper side of the control panel 40 and connected through the panel mounting groove 103; the panel 50 is provided with a display screen mounting hole 501 for mounting the display screen 60, a terminal hole 502 for mounting the wiring terminal 70, and a switch hole 503 for mounting the switch button 80; the wiring terminal 70, the display screen 60 and the switch button 80 are connected to the control panel 40 through the wiring board 30;

A controller 401, a voltage detection module 402, a standard resistance module 403, a relay module 404 and a discharge module 405 are provided on the control board 40. The output end of the voltage detection module 402 is connected to the controller 401. The output end of the controller 401 is connected to the relay module 404 and the display screen 60. The standard resistance module 403 is connected to the terminal 70 through the terminal block 30. The terminal 70 is used to connect the insulation resistance to be measured. The discharge module 405 is grounded through the discharge switch.

In the embodiment of the utility model, the shell and the cover body form a closed structure. A handle can be provided on the shell for easy carrying. A lock is provided at the position where the shell and the cover body are buckled, and the cover body is connected and fixed to the shell by the lock.

When in use, open the cover, the wiring terminals can be set according to the number of designed test branches, the insulation resistor to be tested is connected to the wiring terminals in turn, the switch button is turned on to power on, and the voltage detection module detects whether the connected insulation resistor to be tested is energized. If not, the test continues, and if it is energized, the test is stopped; if not, the controller controls the relay module to test the insulation resistor to be tested, and the resistance of the connected insulation resistor to be tested is measured in turn by controlling the relay module. After the measurement is completed, the discharge module is used to discharge. During the test process, there is no need to manually plug in the wires separately. The wiring terminals can be plugged in before the test. Active discharge is performed after the test is completed, which reduces the test time and improves the test efficiency.

In the embodiment of the utility model, the controller 401 adopts the STC89C52 single chip microcomputer, and the display screen adopts the 1602 liquid crystal display screen. The controller controls the relay module to connect multiple test circuits in sequence, and discharges after completing all the tests. The test process is simple and convenient. By setting the standard resistance module to calculate the resistance value of the insulation resistance to be tested, the circuit structure is simple and the measurement accuracy is high.

In the embodiment of the utility model, a charging interface 504 is provided on the panel 50, and the battery is charged through the charging interface. In order to ensure the safety of the test, a grounding post 505 is also provided on the panel 50, and the grounding post is used to ground the housing to prevent the housing from being charged and affecting the operator.

In the embodiment of the utility model, the shell 10 and the cover 101 are made of aluminum plates, which are light in weight, and the surface of the aluminum plates is brushed anodized. The thickness of the shell 10 and the cover 101 is 3 mm. The mounting base plate 102 and the battery mounting plate 221 are made of epoxy resin plates, which have good insulation properties.

The utility model is provided with a plurality of test branches, and by providing a plurality of wiring terminals, the circuits are connected once before the measurement starts, so that the probes are prevented from being frequently moved during the test, repetitive work is reduced on site, the workload on site is reduced, work efficiency is improved, and the operating error rate is reduced. Automatic measurement is realized through the controller, and the operation is simple, the indication is accurate, and the display is comprehensive.

The utility model obtains the insulation resistance value by testing the insulation resistance, improves the reliability and economy of the relay protection equipment, ensures the safety and reliability of the power grid, can test multiple insulation resistances at one time, reduces the maintenance outage time, increases the power supply, effectively improves the efficiency, provides users with safe, reliable, clean and high-quality electricity, and improves social benefits.

The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Many other changes and modifications can be made without departing from the concept and scope of the utility model. It should be understood that the utility model is not limited to a specific embodiment, and the scope of the utility model is defined by the appended claims.

Claims (7)

1. Multi-branch insulation resistance automatic tester, its characterized in that: comprising the following steps:

the shell and the cover body are connected through hinges;

the shell is internally provided with an installation bottom plate, a power supply module, a wiring board, a control board and a panel;

The power module comprises a transformer and a battery, and the battery is connected with the mounting bottom plate through a battery mounting seat;

The mounting baseplate is provided with a support column, the wiring board and the control board are connected with the mounting baseplate through the support column, the inner side of the shell is provided with a panel mounting groove, and the panel is arranged on the upper side of the control board and is connected through the panel mounting groove;

The panel is provided with a display screen mounting hole for mounting a display screen, a wiring terminal hole for mounting a wiring terminal and a switch hole for mounting a switch button;

The wiring terminal, the display screen and the switch button are connected with the control board through the wiring board;

The control panel is provided with a controller, a voltage detection module, a standard resistor module and a relay module, wherein the output end of the voltage detection module is connected with the controller, the output end of the controller is connected with the relay control module and the display screen, the standard resistor module is connected with a wiring terminal through a wiring board, the wiring terminal is used for connecting an insulation resistor to be tested, and the power module is further connected with a discharging module.

2. The automatic multi-branch insulation resistance tester according to claim 1, wherein: the controller adopts STC89C52 singlechip.

3. The automatic multi-branch insulation resistance tester according to claim 1, wherein: and a charging interface is arranged on the panel.

4. The automatic multi-branch insulation resistance tester according to claim 1, wherein: and the panel is also provided with a grounding column.

5. The automatic multi-branch insulation resistance tester according to claim 1, wherein: the shell and the cover body are made of aluminum plates, and the epitopes of the aluminum plates are wire drawing anodized.

6. The automatic multi-branch insulation resistance tester according to claim 1, wherein: the thickness of the shell and the cover body is 3mm.

7. The automatic multi-branch insulation resistance tester according to claim 1, wherein: the mounting bottom plate and the battery mounting plate are made of epoxy resin plates.