CN203688174U - Device capable of onsite detecting transformer oil leakage and gas relay alarm performance - Google Patents

Abstract

The utility model discloses a device for on-site detection of transformer oil leakage and the alarm performance of a gas relay, which comprises a three-way joint matched with one end of the gas relay. One end of the joint is connected to an electric air pump through a conduit, and the electric air pump is connected to a controller. A gas flow sensor and a pressure sensor are arranged in the three-way joint, and both the gas flow sensor and the pressure sensor are connected to the controller. When in use, close the valve of the auxiliary oil tank, install the tee joint under the gas relay, connect the transformer oil pipe to the tee joint, close the control valve 1, turn on the electric air pump, and open the control valve 8 and control valve 9 at the same time, the gas flow sensor and The pressure sensor sends the pressure and flow of the output airflow to the controller for display.

Description

A device for on-site detection of transformer oil leakage and gas relay alarm performance

technical field

The utility model relates to the technical field of transformer detection equipment, in particular to a device for on-site detection of transformer oil leakage and gas relay alarm performance.

Background technique

The transformer is a very important device in the power system, and its reliable operation is crucial to the stable operation of the power system. At present, during the use of power transformers, the phenomenon of oil leakage can only be solved by manual inspection. This monitoring method not only wastes manpower, but also finds that there is great uncertainty and instability in transformer oil leakage. If the transformer oil leakage is not found in time, the insulation level of the transformer will drop after the oil leakage, resulting in breakdown damage, causing accidents, directly affecting power production and endangering personal safety.

At the same time, the gas relay is an important technical measure to protect the safe operation of the oil-immersed transformer, and has the advantages of high sensitivity, simple installation and wiring. However, gas relays are prone to failures such as oil leakage, which requires regular inspections. At present, the gas relay calibration and detection device is mainly the gas relay calibration table in the laboratory. The gas relay calibration table is used to simulate the actual operating conditions in the laboratory, and the electric pump is used to control the flow of the medium oil to push the baffle of the gas relay. That is, the flow action value of the gas relay is calibrated, so as to check the calibration of the gas relay. Although this kind of device is feasible, because of the use of electric pumps and medium oil, its volume is large and it is easy to pollute the environment. In addition, it is carried out in a laboratory environment. For the scene of the usual power equipment maintenance, this detection and calibration device cannot For on-site calibration, the 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 device for on-site detection of transformer oil leakage and gas relay alarm performance. The pump controls the flow rate of the medium oil, which can truly detect the performance of the gas relay.

In order to solve the above-mentioned technical problems, the technical proposal of the utility model is: a device for on-site detection of transformer oil leakage and gas relay alarm performance, including a three-way joint matched with one end of the gas relay, each end of the three-way joint is Control valves are all set, one end of the three-way joint is connected to an electric air pump through a conduit, the electric air pump is connected to a controller, and a gas flow sensor and a pressure sensor are arranged in the three-way joint, and the gas flow sensor and the pressure sensor are both Connect with the controller.

The controller is connected with an alarm.

The control valve adopts a one-way solenoid valve, and the one-way solenoid valve is connected with the controller.

When the utility model is in use, close the valve of the auxiliary oil tank, install the three-way joint under the gas relay, connect the transformer oil pipe to the three-way joint, close the control valve 1, open the electric air pump, and open the control valve 8 and control valve 9 at the same time. The gas flow sensor and pressure sensor send the pressure and flow of the output air flow to the controller for display, and record the gas pressure and change time when the contact of the gas relay is activated through the pressure sensor. Change the time to compare whether the performance of the gas relay is up to standard; adjust the output gas flow through the controller and check whether the light gas leakage alarm device is working and whether the heavy gas leakage device is working; close the valve at the side of the auxiliary fuel tank, check whether the gas relay is leaking, and set it through the controller Gas pressure and pressure test time, when the pressure test time is reached, the pressure does not change, which proves that the sealing performance of the gas relay is good; close the control valve 9, open the electric air pump, open the control valve 8 and control valve 1 at the same time, and set it through the controller Gas pressure and withstand voltage test time. When the withstand voltage test time is reached, the pressure does not change, which proves that the transformer has good sealing performance. When the pressure drops, the pressure sensor transmits the signal to the controller, and the controller starts the alarm to alarm. Therefore, based on the above, the device of the utility model can not only detect whether the transformer and the gas relay are leaking oil on site, the detection is accurate, convenient and fast, and the authenticity is high; and it does not need an electric pump to control the flow rate of the medium oil, and can truly detect the gas relay. performance.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is described further:

Fig. 1 is a structural representation of the utility model;

Fig. 2 is a schematic structural view of Embodiment 2 of the utility model.

Detailed ways

Embodiment 1: As shown in Figures 1 and 2, a device for on-site detection of transformer oil leakage and gas relay alarm performance includes a three-way joint 2 that matches one end of the gas relay, and on each end of the three-way joint 2 Control valves are all set, one end of the three-way joint 2 is connected to an electric air pump 5 through a conduit, and the electric air pump 5 is connected to a controller 7, and a gas flow sensor 3 and a pressure sensor 4 are arranged in the three-way joint 2. Both the gas flow sensor 3 and the pressure sensor 4 are connected with the controller 7 .

Embodiment 2: As shown in Figures 1 and 2, a device for on-site detection of transformer oil leakage and gas relay alarm performance includes a three-way joint 2 that matches one end of the gas relay, and on each end of the three-way joint 2 Control valves are all set, one end of the three-way joint 2 is connected to an electric air pump 5 through a conduit, and the electric air pump 5 is connected to a controller 7, and a gas flow sensor 3 and a pressure sensor 4 are arranged in the three-way joint 2. Both the gas flow sensor 3 and the pressure sensor 4 are connected with the controller 7 . The controller 7 is connected with an alarm 6 . The control valve adopts a one-way solenoid valve, and the one-way solenoid valve is connected with the controller 6 .

Embodiment 3: As shown in Figures 1 and 2, a device for on-site detection of transformer oil leakage and gas relay alarm performance includes a tee joint 2 that matches one end of the gas relay, and each end of the tee joint 2 is Control valves are all set, one end of the three-way joint 2 is connected to an electric air pump 5 through a conduit, and the electric air pump 5 is connected to a controller 7, and a gas flow sensor 3 and a pressure sensor 4 are arranged in the three-way joint 2. Both the gas flow sensor 3 and the pressure sensor 4 are connected with the controller 7 . The controller 7 is connected with an alarm 6 .

When the utility model is in use, close the valve of the auxiliary oil tank, install the three-way joint under the gas relay, connect the transformer oil pipe to the three-way joint, close the control valve 1, open the electric air pump, and open the control valve 8 and control valve 9 at the same time. The gas flow sensor and pressure sensor send the pressure and flow of the output air flow to the controller for display, and record the gas pressure and change time when the contact of the gas relay is activated through the pressure sensor. Change the time to compare whether the performance of the gas relay is up to standard; adjust the output gas flow through the controller and check whether the light gas leakage alarm device is working and whether the heavy gas leakage device is working; close the valve at the side of the auxiliary fuel tank, check whether the gas relay is leaking, and set it through the controller Gas pressure and pressure test time, when the pressure test time is reached, the pressure does not change, which proves that the sealing performance of the gas relay is good; close the control valve 9, open the electric air pump, open the control valve 8 and control valve 1 at the same time, and set it through the controller Gas pressure and withstand voltage test time. When the withstand voltage test time is reached, the pressure does not change, which proves that the transformer has good sealing performance. When the pressure drops, the pressure sensor transmits the signal to the controller, and the controller starts the alarm to alarm. The controller 7 is connected with an alarm 6 . The control valve adopts a one-way solenoid valve, and the one-way solenoid valve is connected with the controller 6, and the transformer to be tested or the gas relay is controlled by one key of the controller, which is convenient and fast. Therefore, based on the above, the device of the utility model can not only detect whether the transformer and the gas relay are leaking oil on site, the detection is accurate, convenient and fast, and the authenticity is high; and it does not need an electric pump to control the flow rate of the medium oil, and can truly detect the gas relay. performance.

Claims (3)

1. A device for on-site detection of transformer oil leakage and gas relay alarm performance, characterized in that: it includes a three-way joint matched with one end of the gas relay, each end of the three-way joint is provided with a control valve, and the three-way joint is equipped with a control valve. One end of the joint is connected to an electric air pump through a conduit, and the electric air pump is connected to a controller. A gas flow sensor and a pressure sensor are arranged in the three-way joint, and both the gas flow sensor and the pressure sensor are connected to the controller. 2. The device for on-site detection of transformer oil leakage and gas relay alarm performance as claimed in claim 1, characterized in that: said controller is connected with an alarm. 3. The device for on-site detection of transformer oil leakage and gas relay alarm performance as claimed in claim 1, characterized in that: said control valve adopts a one-way solenoid valve, and the one-way solenoid valve is connected to the controller.

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