CN211788819U - Intelligent double-floating-ball gas relay and monitoring system - Google Patents

Abstract

The utility model relates to an intelligent two floating ball gas relay, include: the junction box is arranged at the upper part of the convex-shaped shell and adopts a closed packaging structure and is used for realizing data transmission, light gas alarm and heavy gas trip protection functions; the lower side surface of the junction box is provided with a main guide pipe which is a sensing connecting rod and is used for realizing the real-time monitoring function of the oil level of the transformer; the upper floater is arranged at the main guide pipe between the upper retainer ring and the middle retainer ring, and the lower floater is arranged at the main guide pipe between the middle retainer ring and the lower retainer ring. A transformer gas relay monitoring system comprising: the intelligent double-floating-ball gas relay and the management background arranged at the far end. The utility model has simple structure, low implementation cost and easy popularization, and the intelligent double-floating-ball structure makes the monitoring result more accurate; the remote monitoring and control of the transformer can be realized; the production efficiency can be greatly improved.

Description

Intelligent double-floating-ball gas relay and monitoring system

Technical Field

The utility model belongs to the technical field of the relay, concretely relates to two ball gas relay of intelligent and monitored control system, this gas relay can the inside gaseous condition of gathering of real-time supervision gas relay to adopted two ball structure to realize respectively that the online monitoring gas volume gathers volume, light gas is reported to the police, low oil level is reported to the police and tripping operation function.

Background

The oil storage cabinet isolates the transformer oil from the outside atmosphere through adjustable capsules or corrugations, and the transformer oil is connected with the transformer body through a gas collecting pipe to form a transformer oil expansion and contraction compensation system. When the temperature rises, the volume of the transformer oil expands and flows into the oil conservator along with the gas collecting pipeline communicated with the transformer; when the temperature is reduced, the volume of the transformer oil is shrunk and the transformer oil flows back to the transformer from the oil storage cabinet, so that all components in the transformer are always protected by the insulating oil.

A non-electric quantity protection device commonly used on a transformer is called a gas relay (also called a gas relay), and the installation position of the gas relay is positioned at the highest position of a gas guide pipe between an oil storage cabinet and an oil tank and is close to the oil storage cabinet. If the transformer has faults, no matter the transformer is internally faulted, such as: the breakdown of the insulating oil to generate gas due to turn-to-turn short circuit, overheating, partial discharge, and the like; or a transformer external fault, such as: oil leakage, air intake due to poor sealing or internal gas accumulation due to improper installation process and the like, and the transformer is changed under the conditions, and the changes are gradually reflected on the gas relay.

And (3) light gas alarming: under normal operation, when a fault occurs inside a transformer (or a load switch) (such as a discharge fault or an overheating fault), transformer oil or solid insulating materials are decomposed along with the fault, and gases such as hydrogen, hydrocarbon gases, carbon monoxide and carbon dioxide are generated, and the gases can move into a gas relay installed at a high point along with the convection circulation of the transformer oil, and the gases slowly gather and form a certain pressure on the top of the gas relay along with the time to reduce the oil level. When the gas accumulation reaches a certain volume, the light gas alarm signal contact of the gas relay is switched on and sends out an alarm signal.

Heavy gas tripping protection: when serious faults such as high energy, arc discharge and the like occur in the transformer, the transformer oil is rapidly decomposed to generate a large amount of gas, the gas is accumulated towards the gas relay and the oil conservator through the gas collecting pipe, the formed oil and gas flow reach a certain flow velocity, the check ring is impacted, the lower magnet is arranged to enable the dry spring contact to be connected with a starting tripping signal, the power supply of the transformer is cut off, and the transformer is protected.

At present, most of conventional gas relays in operation adopt a single-floater and single-contact dry reed pipe structure, although the single-floater structure gas relays can make a transformer alarm or trip when the transformer has an internal fault, when the transformer has serious oil leakage, the relays of the structure only alarm by signals and do not trip, and great hidden danger is caused to safe operation of the transformer. Meanwhile, the single-contact dry spring is affected by vibration and the like, so that the stability is poor, the transformer is frequently tripped, and the potential safety hazard is large.

The method for detecting the specified gas volume value in the DL/T540-2013 gas relay test procedure comprises the following steps: and after the gas relay is filled with transformer oil, two ends of the gas relay are closed and horizontally placed, a gas release valve of the gas relay is opened, oil is slowly released to the relay, and the volume value of the released oil is measured until signal action is output, namely the gas volume action value of the gas relay. The test was repeated three times. The gas action range of the phi 50 and phi 80 gas relays is 250mL-300 mL. When the gas relay is not in accordance with the setting value, the adjustable gas relay is adjusted to reach the setting value.

According to the industrial standard, when the gas volume accumulation in the gas relay is 250-300 mL, a light gas alarm signal is required to be sent, the function can be generally realized by the conventional gas relay, but the gas volume accumulation cannot be monitored in real time, the change trend of the gas volume accumulation cannot be mastered, and the gas volume accumulation and the trend before the light gas alarm is sent cannot be known. With the requirement of the ubiquitous power internet of things provided by national grids and the intelligentization of products by the digital power grid provided by south grid companies, the data requirement on the sensing layer of the transformer is more and more urgent. The existing domestic gas relay manufacturers do not have digital products, the existing improvement strategies of the manufacturers only realize the double-floating-ball structure proposed in eighteen countermeasure requirements of the national grid, the patent barriers of foreign manufacturers are broken, the original double-floating-ball type is changed into a double-floater or double-floating-barrel type, the original hollow floating ball is changed into a solid foam ball, and the essential information output mode of the gas relay is not researched.

The floating ball type liquid level meter operates by using magnetic force, has no mechanical connecting piece and is simple and reliable to operate. When the detected medium floats on the float switch, the float drives the main body to move, and meanwhile, the magnet at the other end of the float controls the magnet on the switch action rod. The technical advantages of the floating ball type liquid level meter are as follows: the float switch does not contain a corrugated pipe, a spring, a seal and other parts which cause faults, but adopts a straight floater to drive a magnet inside the switch, and a simple lever of the float switch enables the switch to act instantly. The float cantilever angle is designed to limit, preventing the float from being vertical. One or more point magnetic reed switches are designed in a closed metal or plastic tube, then the tube penetrates through one or more hollow floating rings with annular magnets inside, and the floating ball and the magnetic reed switches are controlled to be in relevant positions by utilizing a fixing ring so as to float up and down within a certain range. The magnet in the floating ball is used to attract the contact of the magnetic reed switch to generate the on and off actions, thereby realizing the control or indication of the liquid level.

The device is used for changing a voltage division circuit consisting of a resistor in a connecting rod and a magnetic reed switch, and the smaller the gap of the magnetic reed switch is, the higher the precision is, so that the continuous liquid level monitoring is realized. The divided signal can be converted into 4-20mA or other different standard signal by a converter. The indicator can be matched with other gauge heads to carry out remote indication, and is a liquid level indicator with simple principle and excellent reliability.

Disclosure of Invention

In order to solve the technical problem, the utility model discloses gas relay gas volume alarm mechanism with traditional structure replaces with the floater formula level gauge. In order to realize the real-time supervision and the light gas warning of gas volume of gathering and heavy gas tripping operation protection, be the law of high point gathering, by the high low gradual pressure oil level that changes, the oil level also is the law that from top to bottom reduces gradually when transformer oil leak trouble, the utility model discloses a branch road structure of two magnetism floats establishing ties, the precision of going up the magnetic reed switch is high, can discern the small change of oil level to can transmit the gaseous condition of gathering in oil level top in real time. A light gas alarm magnetic reed switch is arranged at the position where the volume reaches 250-300 mL from top to bottom; and a lower magnetic reed switch is arranged at the lowest oil level position to carry out heavy gas tripping protection. The utility model discloses the technical scheme who adopts as follows:

an intelligent double-floating-ball gas relay comprising: the junction box is arranged at the upper part of the convex-shaped shell and adopts a closed packaging structure and is used for realizing data transmission, light gas alarm and heavy gas trip protection functions;

the lower side surface of the junction box is provided with a main conduit, the junction box is fixedly connected with the main conduit in a welding mode, and the main conduit is a sensing connecting rod and is used for realizing the real-time monitoring function of the oil level of the transformer; an upper retainer ring is arranged at the upper end part of the main guide pipe, a middle retainer ring is arranged in the middle of the main guide pipe, and a lower retainer ring is arranged at the lower end part of the main guide pipe; the upper retainer ring and the lower retainer ring are of circular metal structures and fixed after penetrating through the main catheter, and the middle retainer ring is an annular metal block fixed on the main catheter;

the upper floater is arranged at the main guide pipe between the upper retainer ring and the middle retainer ring, and an upper magnetic reed switch for light gas alarm is arranged in the main guide pipe between the upper retainer ring and the middle retainer ring; the lower floater is arranged at the main guide pipe between the middle check ring and the lower check ring, and a lower magnetic reed switch for heavy gas tripping is arranged in the main guide pipe between the middle check ring and the lower check ring; the upper floater and the lower floater are made of annular light materials, and magnets are arranged inside the upper floater and the lower floater.

Preferably, the wiring box is internally provided with a wiring board, a transient gas accumulation quantity characteristic quantity measuring module, a signal conditioning and collecting module, a gas relay switching quantity input module and a digital core processing module, and the signal conditioning and collecting module is respectively and electrically connected with the transient gas accumulation quantity characteristic quantity measuring module, the gas relay switching quantity input module and the digital core processing module to realize data interaction.

Preferably, the transient gas accumulation quantity characteristic quantity measuring module converts a transformer oil level signal into a gas accumulation quantity signal for monitoring, and outputs a 4-20mA signal;

the gas relay switching value input module directly inputs the light gas alarm of the upper magnetic reed switch and the heavy gas tripping protection signal value of the lower magnetic reed switch into the signal conditioning and collecting module;

the signal conditioning and acquisition module performs unified data format conversion on the data transmitted by the transient gas accumulation quantity characteristic quantity measurement module, converts the data into standard digital signals which can be identified by the digital core processing module, and then outputs the standard digital signals to the digital core processing module; and the signals are primarily screened and stored;

and the digital core processing module judges the signals transmitted by the signal conditioning and collecting module.

Preferably, a first window and a second window are arranged on the convex-shaped shell, the first window and the second window are visible transparent windows, and the position of the first window corresponds to the movable range of the upper float; the position of the second window corresponds to the range of motion of the lower float.

Preferably, the upper retainer ring, the middle retainer ring and the lower retainer ring are fixed in a welding mode.

Preferably, the lower portion of the terminal box has a small hole with the same diameter as the main conduit.

Preferably, the length of the main conduit is not less than the deepest half of the oil level of the oil-immersed part in the gas relay.

A transformer gas relay monitoring system comprising: the intelligent double-floating-ball gas relay comprises an intelligent double-floating-ball gas relay and a management background arranged at a far end, wherein the management background is used for inquiring the running state data of the transformer by transformer operation and maintenance management personnel.

Preferably, the intelligent double-floating-ball gas relay and the management background realize information exchange and data transmission through the Ethernet.

The utility model has the advantages that:

1) the utility model discloses simple structure, implementation cost is low, easy popularization, and intelligent two ball structures that float make the monitoring result more accurate.

2) The utility model discloses a monitoring system can realize remote monitoring and control to the transformer.

3) The utility model discloses both realized the real-time supervision that the gas volume gathers volume in the gas relay, realized light gas again and reported to the police, heavy gas low oil level tripping operation function, can improve production efficiency greatly.

4) The utility model is composed of light gas alarm and heavy gas trip two way signals, and has reliable structure; and a background intelligent system is arranged, and the intelligent system has an man-machine conversation interface and can carry out remote operation and maintenance.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are illustrative of some embodiments of the invention, and that those skilled in the art will be able to derive other drawings without inventive step from these drawings, which are within the scope of the present application.

Fig. 1 is a schematic structural diagram of a double-floating-ball gas relay according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the operating principle of the float level gauge;

fig. 3 is a schematic diagram illustrating a principle of monitoring an oil level of a transformer according to an embodiment of the present invention;

in the figure, 1-upper retainer, 2-main duct, 3-middle retainer, 4-lower retainer, 5-first flange, 6-convex shell, 7-junction box, 8-first window, 9-upper floater, 10-lower floater, 11-second flange, 12-second window, 13-magnetic reed switch, 14-permanent magnet, 15-magnetic floater, 16-sensing connecting rod.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1, it is a schematic structural diagram of a dual floating ball gas relay according to an embodiment of the present invention. The utility model provides a two ball gas relay that float of intelligent, gas relay installs between the communicating union coupling of oil conservator and transformer through first flange 5 and second flange 11. The double-floating-ball gas relay includes: the relay comprises a convex relay shell 6, wherein a junction box 7 is arranged at the upper part of the shell 6, and the junction box 7 is connected with the shell 6 through bolts; the junction box 7 is of a closed packaging structure, a wiring board, a transient gas accumulation quantity characteristic quantity measuring module, a signal conditioning and collecting module, a gas relay switching quantity input module and a digital core processing module are mounted inside the junction box, and the signal conditioning and collecting module is respectively electrically connected with the transient gas accumulation quantity characteristic quantity measuring module, the gas relay switching quantity input module and the digital core processing module to realize data interaction, and realize data transmission, light gas alarm and heavy gas trip protection functions. The wiring board is a circuit back board, and a transient gas accumulation quantity characteristic quantity measuring module, a gas relay switching quantity input module and the like are inserted on the wiring board; meanwhile, a light gas alarm and heavy gas tripping trigger circuit is arranged in the connecting plate, an alarm signal is sent out after the light gas alarm circuit acts in a delayed mode, and a main outlet of the transformer protection is started after the heavy gas tripping circuit acts, so that the circuit breaker is tripped. Patch panels and methods of implementing them are known in the art and will not be described in detail herein.

The main guide pipe 2 is arranged on the lower side surface of the junction box 7 in a welding mode, so that transformer oil is prevented from permeating into the junction box 7, and the sealing performance of the junction box 7 is guaranteed. The lower part of the junction box 7 is provided with a small hole with the same diameter as the main guide pipe 2, the main guide pipe 2 penetrates into the gas relay through the small hole, the upper part of the main guide pipe 2 is provided with a wire connecting wiring board, and part of the wire connecting wiring board goes deep into the gas relay is provided with a check ring and a floating ball. The main duct 2 is a sensing connecting rod (a magnetic spring module is arranged in the sensing connecting rod, the internal resistance of the sensor is linearly changed through the magnetic coupling effect, when the floater moves on the sensing connecting rod, the reed switch is attracted by magnetism to cause the change of the resistance value, the resistance signal is converted into 4-20mA standard signal output through a converter, the oil level information is converted into an electric signal, the floater drives the magnet to move, and the function of monitoring the oil level of the transformer in real time is achieved. An upper retainer ring 1 is arranged at the upper end part of the main guide pipe 2, a middle retainer ring 3 is arranged in the middle of the main guide pipe 2, and a lower retainer ring 4 is arranged at the lower end part of the main guide pipe 2. Go up retaining ring 1 and lower retaining ring 4 for circular metal construction, pass main duct 2 after-fixing, well retaining ring 3 is the annular metal piece of fixing on main duct 2, the range of motion of restriction upper float 9, lower float 10, and it adopts the welding mode fixed to go up retaining ring 1, well retaining ring 3 and lower retaining ring 4.

The length of the main guide pipe 2 is determined according to the diameter of the oil guide pipe of the transformer and the oil storage cabinet, the inner diameter of the gas relay and the depth of the oil immersion part, and the length of the main guide pipe 2 is not less than half of the deepest oil level of the oil immersion part in the gas relay. For example, the connecting pipe diameter of the oil guide pipe is 80mm, the deepest oil level of the oil immersion part in the gas relay is 180mm, and the length of the main guide pipe 2 can be set to be 90-95 mm. The design fully considers the detection precision and the internal structure of the gas relay, thereby not only ensuring the requirement of the detection precision, but also reducing the spatial design of the gas relay.

The upper floater 9 is arranged at the main conduit 2 between the upper retainer ring 1 and the middle retainer ring 3, the gap of an upper magnetic reed switch inside the main conduit 2 between the upper retainer ring 1 and the middle retainer ring 3 is small, the precision is high, and the small change of the oil level of the insulating transformer can be identified. The upper float 9 can only move between the upper retainer ring 1 and the middle retainer ring 3, and an upper magnetic reed switch for light gas alarm is arranged in the section of the main guide pipe 2. The main duct 2 department between retainer ring 3 and lower retainer ring 4 is installed to lower float 10, and the clearance of the lower reed switch in the main duct 2 between well retainer ring 3 and lower retainer ring 4 is big, set up in this section main duct 2 be used for heavy gas trip lower reed switch can, lower float 10 can only move between well retainer ring 3 and lower retainer ring 4, soaks in transformer oil most of the time, near the below of well retainer ring 3. The upper floater 9 and the lower floater 10 are made of annular light materials, magnets are arranged in the upper floater 9 and the lower floater 10, and after the upper floater 9 and the lower floater 10 move to fixed positions, the upper magnetic spring switch and the lower magnetic spring switch act to communicate with a voltage division circuit.

In the embodiment of the utility model, a first window 8 and a second window 12 are arranged on the shell 6, the first window 8 and the second window 12 are visual transparent windows, the position of the first window 8 corresponds to the range of motion of the upper float 9 and is used for observing the position of the upper float 9 and the air volume aggregation condition; the position of the second window 12 corresponds to the movable range of the lower float 10 for observing the position of the lower float 10 and the condition of the transformer oil level.

The embodiment of the utility model provides an in, utilize present floater formula level gauge's principle and design, can realize light gas warning, heavy gas tripping operation protect function, the theory of operation of floater formula level gauge is as shown in figure 2. According to the buoyancy principle and the magnetic coupling principle, after gas is generated inside the transformer, the gas forces the magnetic floating ball 15 to descend, the permanent magnet 14 in the magnetic floating ball 15 is transmitted to the sensing connecting rod 16 through magnetic coupling, the position of the permanent magnet 14 changes the state (closing) of the magnetic reed switch 13 in the sensing connecting rod 16, the resistance value of the sensing connecting rod 16 changes along with the position of the magnetic floating ball 15, the lower the oil level of the transformer is, the larger the resistance value is, and further the lower the oil level of the transformer is, the larger the resistance value can be converted into a corresponding 4-20mA signal, and the real-time monitoring of the gas volume accumulation in. In the embodiment of the utility model, an upper magnetic reed switch (alarm switch) is arranged at the position where the volume of the gas accumulation from top to bottom reaches 250mL to 300mL, and an alarm signal (light gas alarm) is sent; and a lower magnetic reed switch (trip switch) is arranged at the position where the low oil level appears, so that heavy gas trip protection is realized. Therefore, the real-time monitoring of the gas volume accumulation in the gas relay is realized, and the functions of light gas alarming and heavy gas tripping protection are realized.

The embodiment of the utility model provides an in, the transformer operation in-process, be full of transformer oil in the gas relay under most circumstances, go up float 9 and be located retaining ring 1 below, near the lower surface of last retaining ring 1, lower float 10 is located well retaining ring 3 below, near the lower surface of well retaining ring 3. If the transformer breaks down and gas is generated inside, the gas is accumulated above the gas relay, the oil level gradually descends, firstly, the upper float 9 descends along with the oil level, and because the upper magnetic spring switch inside the upper half part of the main guide pipe 2 is high in precision, small changes of the liquid level can also transmit signals in real time, and therefore real-time monitoring of the gas accumulation amount is achieved. When the oil level continues to descend and falls below the middle retainer ring 3, the upper float 9 does not move downwards and is positioned on the upper surface of the middle retainer ring 3, and at the moment, common faults are serious, and the operation condition of the transformer needs to be focused. At this time, the lower float 10 descends along with the oil level, and when the lower float descends to the set lower magnetic reed switch, the heavy gas trip protection function is triggered.

The transient gas accumulation quantity characteristic quantity measuring module monitors oil level signals of the transformer through a double-floating-ball liquid level meter, converts the liquid level signals into gas accumulation quantity monitoring, and outputs 4-20mA signals.

The gas relay switching value input module directly inputs the light gas alarm of the upper magnetic reed switch and the heavy gas tripping protection signal value of the lower magnetic reed switch into the signal conditioning and collecting module, sets circuit trigger signals in different states and can be realized through hardware and programs.

The signal conditioning and acquisition module performs unified data format conversion on the data transmitted by the transient gas accumulation quantity characteristic quantity measurement module, converts the data into standard digital signals which can be identified by the digital core processing module, and then outputs the standard digital signals to the digital core processing module; and the signals are preliminarily screened and stored, the numerical value change condition of the electrical quantity before and after tripping or sending the alarm signal, such as the gas volume accumulation, is automatically and accurately recorded, and the method can be realized through a program module.

The digital core processing module judges the signals transmitted by the signal conditioning and acquisition module, judges whether light gas alarm and heavy gas trip are met, sends out corresponding trigger signals after the conditions are met, sends out light gas alarm or heavy gas trip, stores data before and after the signals are sent out, and is convenient for later checking.

As shown in fig. 3, is the schematic diagram of the monitoring principle of the transformer oil level of the embodiment of the present invention. Methods for realizing the transient gas accumulation quantity characteristic quantity measuring module, the signal conditioning and collecting module, the gas relay switching value input module and the digital core processing module through hardware or programs are all in the prior art, only relate to data collection, analog-to-digital conversion, transmission and comparison, do not relate to improvement of programs and methods, and are not described herein again.

A transformer gas relay monitoring system comprising: the intelligent double-floating-ball gas relay converts data into a unified data transmission message format and a communication protocol (a power equipment wireless sensor network node networking protocol) through a digital core processing module, and realizes information exchange, data transmission and remote operation and maintenance with the remote management background by utilizing an Ethernet. The transformer operation and maintenance manager logs in a remote management background, can input a data query command and a query time period, quickly queries running state data of the transformer in the time period, acquires gas accumulation quantity characteristics, analyzes accident reasons and provides a corresponding solution.

Finally, it is to be noted that: the above embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, and the scope of the present invention is not limited thereto. Those skilled in the art will understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims (9)

1. The utility model provides an intelligent two floating ball gas relay which characterized in that includes: the high-voltage switch comprises a convex shell (6), wherein the upper part of the convex shell (6) is provided with a junction box (7), and the junction box (7) adopts a closed packaging structure and is used for realizing data transmission, light gas alarm and heavy gas trip protection functions;

the lower side surface of the junction box (7) is provided with a main conduit (2), the junction box (7) is fixedly connected with the main conduit (2) in a welding mode, and the main conduit (2) is a sensing connecting rod and is used for realizing the real-time monitoring function of the oil level of the transformer; an upper retainer ring (1) is arranged at the upper end part of the main guide pipe (2), a middle retainer ring (3) is arranged in the middle of the main guide pipe (2), and a lower retainer ring (4) is arranged at the lower end part of the main guide pipe (2); the upper retainer ring (1) and the lower retainer ring (4) are of circular metal structures and fixed after penetrating through the main catheter (2), and the middle retainer ring (3) is an annular metal block fixed on the main catheter (2);

the upper floater (9) is arranged at the main duct (2) between the upper retainer ring (1) and the middle retainer ring (3), and an upper magnetic reed switch for light gas alarm is arranged in the main duct (2) between the upper retainer ring (1) and the middle retainer ring (3); the lower floater (10) is arranged at the main conduit (2) between the middle check ring (3) and the lower check ring (4), and a lower magnetic reed switch for heavy gas tripping is arranged inside the main conduit (2) between the middle check ring (3) and the lower check ring (4); the upper floater (9) and the lower floater (10) are made of annular light materials, and magnets are arranged inside the annular light materials.

2. An intelligent double-floating-ball gas relay as claimed in claim 1, wherein a wiring board, a transient gas accumulation quantity characteristic quantity measuring module, a signal conditioning and collecting module, a gas relay switching quantity input module and a digital core processing module are installed inside the wiring box (7), and the signal conditioning and collecting module is respectively electrically connected with the transient gas accumulation quantity characteristic quantity measuring module, the gas relay switching quantity input module and the digital core processing module to realize data interaction.

3. The intelligent double-floating-ball gas relay as claimed in claim 2, wherein the transient gas accumulation quantity characteristic quantity measuring module is used for converting a transformer oil liquid level signal into a gas accumulation quantity signal for monitoring, and outputting a 4-20mA signal;

the gas relay switching value input module directly inputs the light gas alarm of the upper magnetic reed switch and the heavy gas tripping protection signal value of the lower magnetic reed switch into the signal conditioning and collecting module;

the signal conditioning and acquisition module performs unified data format conversion on the data transmitted by the transient gas accumulation quantity characteristic quantity measurement module, converts the data into standard digital signals which can be identified by the digital core processing module, and then outputs the standard digital signals to the digital core processing module; and the signals are primarily screened and stored;

and the digital core processing module judges the signals transmitted by the signal conditioning and collecting module.

4. An intelligent double-floating-ball gas relay according to any one of claims 1-3, characterized in that a first window (8) and a second window (12) are arranged on the convex-shaped shell (6), the first window (8) and the second window (12) are visual transparent windows, and the position of the first window (8) corresponds to the movable range of the upper float (9); the position of the second window (12) corresponds to the range of motion of the lower float (10).

5. An intelligent double-floating-ball gas relay according to any one of claims 1-3, wherein the upper retainer ring (1), the middle retainer ring (3) and the lower retainer ring (4) are fixed by welding.

6. An intelligent double-floating-ball gas relay according to any one of claims 1-3, wherein the lower part of the junction box (7) has a small hole with the same diameter as the main duct (2).

7. An intelligent double-floating-ball gas relay according to any one of claims 1-3, wherein the length of the main conduit (2) is not less than the deepest half of the oil level of the oil-immersed part in the gas relay.

8. A transformer gas relay monitoring system, comprising: the intelligent double-floating-ball gas relay as claimed in any one of claims 1-3, and a management background arranged at a remote end, wherein the management background is used for a transformer operation and maintenance manager to inquire the running state data of the transformer.

9. The transformer gas relay monitoring system according to claim 8, wherein information exchange and data transmission between the intelligent double-floating-ball gas relay and the management background are realized through Ethernet.

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