CN111863522A - Electronic gas relay - Google Patents

Abstract

The invention relates to an electronic gas relay, the main technical features of which are: a junction box is installed on the top of the relay shell, two connecting terminals, two signal output terminals and an information processor are arranged inside the junction box, and the gas relay A gas release valve is arranged at the side end of the top of the casing; a glass window is arranged in the middle of the front panel of the gas relay casing, and a liquid level sensor, a flow rate sensor and a liquid level sensor are respectively installed inside the gas relay casing through a fixed bracket; The position sensor, the flow rate sensor, the output end of the liquid level sensor, and the two signal output terminals are all connected with the information processor. The invention can accurately and effectively detect the action condition of the double-floating ball type gas relay, which facilitates the operation and maintenance personnel to grasp the equipment condition in time, more accurately sets the action value of the heavy gas, and avoids the misoperation of the lower floating ball heavy gas caused by the double-floating ball relay. In other cases, it can effectively reduce the gas malfunction rate.

Description

Electronic gas relay

technical field

The invention belongs to the technical field of relays, in particular to an electronic gas relay.

Background technique

Gas relay (also known as gas relay) is a basic protection device for transformers. As a non-electrical protection used for the main protection of power transformers, it can effectively reflect the internal fault of the transformer. The reliability and accuracy of its action are crucial to the operation of the transformer. important.

The gas relay mainly has two functions, the light gas acts on the signal, and the heavy gas acts on the trip. At present, the gas relays widely used in transformers mainly include two types: open cup type and double float type. Among them, the open cup type has no bottom oil level trip signal. Both gas relays cannot avoid the misoperation of heavy gas during operation. According to the analysis of the structure and actual operation of the gas relay, most of the malfunctions are caused by the action of the baffle that can cause heavy gas tripping or the action of the bottom oil level float that shares a contact with the heavy gas baffle.

In summary, how to quickly and accurately judge the malfunction of the gas relay is an urgent problem to be solved at present.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies of the prior art, and propose an electronic gas relay, which solves the malfunction of the lower floating ball caused by the oil flow surging of the double-float gas relay, and effectively reduces the gas malfunction rate.

The present invention solves its technical problem by adopting the following technical solutions to realize:

An electronic gas relay includes a relay housing, a junction box is installed on the top of the relay housing, two wiring terminals, two signal output terminals and an information processor are arranged inside the junction box, and on the top side of the gas relay housing A gas release valve is arranged at the end; a glass window is arranged in the middle of the front panel of the gas relay housing; a fixing bracket is arranged inside the gas relay housing; a scale is marked on the upper part of the fixing bracket; A liquid level sensor, a flow rate sensor and a liquid level sensor; the liquid level sensor, the flow rate sensor and the liquid level sensor output terminals are all connected with an information processor, and the information processor is connected with two signal output terminals.

Moreover, the two signal output terminals are connected to a remote monitoring system.

Moreover, the two connection terminals are respectively a light gas signal connection terminal and a trip signal connection terminal; the two signal output terminals are respectively a light gas signal output terminal and a trip signal output terminal.

Moreover, the light gas signal and the trip signal are both: 4-20mA/0-5V.

Moreover, a window cover is provided outside the glass window.

Moreover, the gas relay is a double float type gas relay.

The advantages and positive effects of the present invention are:

The invention installs a liquid level sensor, a flow rate sensor and a liquid level sensor in the gas relay housing, which can accurately and effectively detect the action of the gas relay, and upload the detected data to the remote monitoring system in real time, realizing the network communication function of the detection data. , it is convenient for the operation and maintenance personnel to grasp the equipment situation in time, set the heavy gas action value more accurately, and also help to accurately analyze and judge the equipment failure. Gas malfunction rate.

Description of drawings

1 is a structural diagram of an electronic gas relay of the present invention;

Fig. 2 is the signal processing principle diagram of the present invention;

Among them, 1-relay housing, 2-junction box, 3-light gas signal wiring terminal, 4-trip signal wiring terminal, 5-light gas signal output terminal, 6-trip signal output terminal, 7-information processor, 8- Air release valve, 9-glass window, 10-window cover, 11-fixed bracket, 12-liquid level sensor, 13-flow rate sensor, 14-liquid level sensor.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

An electronic gas relay, as shown in FIG. 1 , includes a relay housing 1 , and a junction box 2 is installed on the top of the relay housing 1 . Inside the junction box 2 are arranged light gas signal wiring terminals 3 , trip signal wiring terminals 4 , and corresponding light gas signal output terminals 5 , trip signal output terminals 6 , and information processor 7 . A purge valve 8 is provided. The light gas signal and the trip signal are (4-20)mA/(0-5)V. A glass window 9 is arranged in the middle of the front panel of the gas relay housing 1 , a window cover 10 is arranged outside the glass window 9 , a fixing bracket 11 is arranged inside the gas relay housing 1 , and a scale is marked on the upper part of the fixing bracket 11 . The upper part, the middle part and the bottom part of the bracket 11 are respectively provided with a liquid level sensor 12 , a flow rate sensor 13 and a liquid level sensor 14 .

As shown in FIG. 2, the output ends of the liquid level sensor 12, the flow rate sensor 13 and the liquid level sensor 14 are all connected to the information processor 7, and the information processor 7 is connected to the signal (4-20)mA/(0-5)V signal Output terminal 5 and trip (4-20)mA/(0-5)V signal output terminal 6 are connected. The information processor 7 collects the signals collected by the liquid level sensor 12, the flow rate sensor 13 and the liquid level sensor 14, and outputs the terminal 5, trip (4-20) through the signal (4-20) mA/(0-5) V signal. mA/(0-5)V signal output terminal 6 outputs two kinds of signals in real time: real-time measured signal value (4-20)mA/(0-5)V and gas action signal/trip, and real-time upload to remote monitoring system, The network communication function of detection data is realized, which is convenient for operation and maintenance personnel to grasp the equipment situation in time. In this embodiment, the information processor may be implemented by a single-chip microcomputer.

The working process of the present invention is as follows: the scale marked on the upper part of the fixed bracket 11 is marked as 0ml at the top of the bracket, and the scale is marked as 10ml within the allowable action volume range of light gas, and the liquid level sensor 12 can record the liquid level change in real time. And within the allowable range, the fixed bracket 11 can be extended to adjust the fixed value, and the light gas action signal is sent out through the signal output terminal 3 at the set value. The flow rate sensor 13 arranged in the middle of the fixed bracket 11 can measure the flow rate of the passing liquid in real time, and send a trip signal through the trip output terminal 4 at the set flow rate value. There is a liquid level sensor 14 at the bottom of the fixed bracket. When the oil loss is lower than the set liquid level, a trip signal is sent through the trip output terminal 4.

It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive, so the present invention includes but is not limited to the embodiments described in the specific implementation manner. Other embodiments derived from the scheme also belong to the protection scope of the present invention.

Claims (6)

1. An electronic gas relay, comprising a relay housing, is characterized in that: a junction box is installed on the top of the relay housing, two wiring terminals, two signal output terminals and an information processor are arranged inside the junction box, The gas relay housing is provided with an air release valve at the top side end; a glass window is provided in the middle of the front panel of the gas relay housing; a fixing bracket is arranged inside the gas relay housing; a scale is marked on the upper part of the fixing bracket; A liquid level sensor, a flow rate sensor and a liquid level sensor are respectively installed in the middle and the bottom; the liquid level sensor, the flow rate sensor and the liquid level sensor output end are all connected with an information processor, and the information processor is connected with two signal output terminals connected. 2 . The electronic gas relay according to claim 1 , wherein the two signal output terminals are connected to a remote monitoring system. 3 . 3. The electronic gas relay according to claim 1 or 2, wherein the two terminals are light gas signal terminals and trip signal terminals respectively; the two signal output terminals are respectively light gas Signal output terminal, trip signal output terminal. 4. The electronic gas relay according to claim 1 or 2, wherein the light gas signal and the trip signal are both: 4-20mA/0-5V. 5 . The electronic gas relay according to claim 1 or 2 , wherein a window cover is provided outside the glass window. 6 . 6. The electronic gas relay according to claim 1 or 2, wherein the gas relay is a double float type gas relay.

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