CN206193189U - Portable transformer buchholz relay calibration equipment - Google Patents

Abstract

The utility model discloses a portable transformer gas relay verification device, which comprises a gas relay verification device body and a touch display screen. The gas relay verification device body is connected with a transformer gas relay through an air pipe. The side is connected with an air intake pipe, and a pressure sensor is installed on the left side, a universal wheel is installed under the casing of the calibration device, a frequency converter is installed above the casing of the calibration device, and the front of the touch screen is passed through an electric A controller is connected, and a frequency converter is installed in front of the controller, and a touch screen is installed on the rear upper surface of the calibration device shell. The portable transformer gas relay calibration device has a reasonable structure and setting. Through the setting of the pressure sensor and the flow rate sensor, the action value of the gas relay is set, and the on-site calibration test of the contact is synchronized. The detection cycle is short, convenient, fast, accurate and reliable, and the work efficiency is high. Promote Development of the power industry.

Description

A portable transformer gas relay calibration device

technical field

The utility model relates to the technical field of transformer safety detection equipment for power systems, in particular to a portable transformer gas relay calibration device.

Background technique

In the power system and power supply system, the transformer is an extremely important power equipment, and protecting the safe and stable operation of the transformer has become an important task for the power supply department. At present, oil-immersed transformers and gas relays are commonly used in my country's power systems It is an important technical measure to protect the safe operation of the oil-immersed transformer. It has the advantages of high sensitivity and simple installation and wiring. The completion of the calibration during the short-term outage of the main transformer will cause potential hidden dangers in operation, which may cause the gas relay to respond untimely to the internal fault of the transformer, and expand the scope of the accident. The relay is placed on the test bench of the gas relay in the laboratory. Although this method is feasible, it has a large volume and is easy to pollute the environment because of the use of electric pumps and medium oil. In addition, this method needs to be carried out in a laboratory environment. The detection and calibration method cannot carry out on-site calibration, and its calibration period is long, and the work efficiency is low, which is not conducive to substation maintenance and on-site fault judgment.

Utility model content

The purpose of this utility model is to provide a portable transformer gas relay calibration device to solve the problem of inability to perform on-site calibration proposed in the above-mentioned background technology. And other issues.

In order to achieve the above purpose, the utility model provides the following technical solutions: a portable transformer gas relay calibration device, including a gas relay calibration device body and a touch display screen, the gas relay calibration device body is connected to a transformer through a gas pipeline Electric gas relay, and the left front end of the gas relay verification device body is equipped with a connector. The gas relay verification device body includes a verification device shell, a controller, an air pump and a gas storage device. A gas storage device is installed at the lower end, and an air pump is installed above the gas storage device. The right side of the air pump is connected to an intake pipe, and a pressure sensor is installed on the left side. Universal wheels are installed under the casing of the calibration device. A flow rate sensor is installed on the left side of the outer shell of the calibration device, and the flow rate sensor is connected to the air pump. An electric control valve is fixedly connected to the left side of the flow rate sensor. A controller is electrically connected in front of the display screen, and a frequency converter is installed in front of the controller, and a touch display screen is installed on the rear upper surface of the casing of the calibration device.

Preferably, the electrical signal output terminals of the pressure sensor, the electric control valve and the flow rate sensor are connected to the signal input terminal of the controller, and the signal output terminal of the controller is connected to the signal input terminal of the touch screen through a cable.

Preferably, the connecting head is a connecting head with a sealing ring, and the connecting head is sealed and connected with the gas delivery pipe.

Preferably, the frequency converter is electrically connected to the air pump, and the frequency converter is electrically connected to the controller.

Preferably, the controller is a single-chip microcomputer, and the air pump is a pneumatic actuator.

Compared with the prior art, the utility model has the beneficial effects that: the portable transformer gas relay verification device has a reasonable structure and small size, and is set by the pressure sensor and the flow rate sensor to set the action value of the gas relay and synchronize the contacts on the spot Calibration test, the detection cycle is short, convenient, fast, accurate and reliable, and the work efficiency is high, so that the power grid has convenient and reliable calibration capabilities, the calibration has been improved in terms of technical capabilities, and provides technical support for the safe operation of the power grid. The control display screen makes the operation more convenient and promotes the development of the electric power industry.

Description of drawings

Fig. 1 is a schematic diagram of the assembly of the main body of the gas relay calibration device of the utility model;

Fig. 2 is a schematic diagram of the main body of the gas relay verification device of the utility model.

In the figure: 1. Transformer gas relay, 2. Air pipe, 3. Gas relay calibration device body, 4. Calibration device shell, 5. Pressure sensor, 6. Connector, 7. Electric control valve, 8. Flow rate Sensor, 9, frequency converter, 10, touch display screen, 11, controller, 12, air pump, 13, intake pipe, 14, gas storage device, 15, universal wheel.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Figure 1-2, the utility model provides a technical solution: a portable transformer gas relay calibration device, including transformer gas relay 1, air pipe 2, gas relay calibration device body 3, calibration device shell 4 , pressure sensor 5, connector 6, electric control valve 7, flow rate sensor 8, frequency converter 9, touch screen 10, controller 11, air pump 12, intake pipe 13, gas storage device 14, universal wheel 15, gas The relay verification device body 3 is connected to the transformer gas relay 1 through the air pipe 2, and the left front end of the gas relay verification device body 3 is equipped with a connector 6, the connector 6 is a connector with a sealing ring, and the connector 6 is sealed and connected with the gas pipeline 2. The gas relay calibration device body 3 includes a calibration device housing 4, a controller 11, an air pump 12 and a gas storage device 14. The lower end of the calibration device housing 4 is equipped with a gas storage device 14. And the air pump 12 is installed above the gas storage device 14, the air intake pipe 13 is connected to the right side of the air pump 12, and the pressure sensor 5 is arranged on the left side, the universal wheel 15 is installed under the calibration device shell 4, and the external left side of the calibration device shell 4 A flow rate sensor 8 is installed on the side, and the flow rate sensor 8 is connected to the air pump 12. An electric control valve 7 is fixedly connected to the left side of the flow rate sensor 8. A frequency converter 9 is installed above the inside of the calibration device shell 4. The front of the touch screen 10 passes through the A controller 11 is electrically connected, and a frequency converter 9 is installed in front of the controller 11. The frequency converter 9 is electrically connected to the air pump 12, and the frequency converter 9 is electrically connected to the controller 11. The controller 11 is a single-chip microcomputer set, and the air pump 12 is a pneumatic actuator, a touch screen 10 is installed on the rear upper surface of the calibration device housing 4, the electrical signal output end of the pressure sensor 5, the electric control valve 7 and the flow rate sensor 8 and the signal input end of the controller 11 connected, and the signal output end of the controller 11 is connected to the signal input end of the touch display screen 10 through a cable, and the on-site calibration test of the fixed value of the gas relay action and the synchronization of the contacts has a short detection period, is convenient, fast, accurate and reliable, and works The high efficiency enables the power grid to have convenient and reliable calibration capabilities, and the technical capabilities of calibration have been improved.

Working principle: When using the portable transformer gas relay calibration device, first transport the equipment to the site, connect it to the gas pipeline 2 through the connector 6, and calibrate the transformer gas relay 1 through the gas relay calibration device body 3 , to test the operating point of the gas relay, the gas flow rate of the equipment is detected by the flow sensor 8, the data is fed back to the controller 11 through the electric signal, the data is displayed through the touch screen 10, and the opening degree of the electric control valve 7 is controlled to adjust At the same time, the gas pressure is detected by the pressure sensor 5. If the amount is insufficient, the air pump 12 is used to inflate the gas, and the value is fed back to the controller 11. The controller 11 controls the air pump 12 through the frequency converter 9 to adjust the pressure. 5 and the flow rate sensor 8 record the flow rate, pressure and change time of the jet gas when the contact of the relay is triggered, and establish a mathematical model through the single-chip microcomputer to obtain the oil flow value corresponding to the gas flow value of the jet flow, so as to conduct on-site detection of the action characteristics of the relay. This is the whole working process of the portable transformer gas relay calibration device.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes and modifications can be made to these embodiments without departing from the principle and spirit of the present invention , replacements and modifications, the scope of the present utility model is defined by the appended claims and their equivalents.

Claims (5)

1. A portable transformer gas relay calibration device, comprising a gas relay calibration device body (3) and a touch display screen (10), characterized in that: the gas relay calibration device body (3) passes through the air pipe ( 2) A transformer gas relay (1) is connected, and a connector (6) is installed on the left front end of the gas relay calibration device body (3), and the gas relay calibration device body (3) includes a calibration device housing (4), controller (11), air pump (12) and gas storage device (14), the inner lower end of the said verification device housing (4) is provided with a gas storage device (14), and the gas storage device (14) An air pump (12) is installed above, the air intake pipe (13) is connected to the right side of the air pump (12), and a pressure sensor (5) is arranged on the left side, and a universal wheel is installed below the calibration device casing (4) (15), the outer left side of the calibration device housing (4) is equipped with a flow rate sensor (8), and the flow rate sensor (8) is connected with the air pump (12), and the left side of the flow rate sensor (8) is fixedly connected with An electric control valve (7), a frequency converter (9) is arranged above the inside of the calibration device housing (4), and a controller (11) is electrically connected to the front of the touch display screen (10), and the controller (11) A frequency converter (9) is installed in the front, and a touch screen (10) is installed on the rear upper surface of the calibration device housing (4). 2. A portable transformer gas relay verification device according to claim 1, characterized in that: the electrical signal output terminals of the pressure sensor (5), the electric control valve (7) and the flow rate sensor (8) are connected with the control The signal input terminal of the controller (11) is connected, and the signal output terminal of the controller (11) is connected with the signal input terminal of the touch display screen (10) through a cable. 3. A portable transformer gas relay verification device according to claim 1, characterized in that: the connector (6) is a connector with a sealing ring, and the connector (6) is connected to the air pipe (2 ) sealed connection. 4. A portable transformer gas relay calibration device according to claim 1, characterized in that: the frequency converter (9) is electrically connected to the air pump (12), and the frequency converter (9) is connected to the controller (11) Connected electrically. 5. A portable transformer gas relay calibration device according to claim 1, characterized in that: the controller (11) is provided with a single-chip microcomputer, and the air pump (12) is a pneumatic actuator.