阅读说明：本技术 一种变压器本体快速排油装置、控制系统及控制方法 (Quick oil discharge device, control system and control method for transformer body ) 是由 谈翀 周斌 季炜 刘光辉 郭鹏鸿 王明胜 柴东新 贾志玲 李庭庭 杨帅 焉媛媛 于 2020-03-17 设计创作，主要内容包括：本发明涉及一种变压器本体快速排油装置,包括：由两路管路并联构成的排油管道结构,每路管路上分别布置一个电动球阀、及一个泄漏监测仪；在两路管路并联交汇后的排油口一端,在交汇管路的上部设置抽真空用截止阀,在交汇管路的下部设置注油用截止阀。本发明还涉及一种变压器本体快速排油控制系统、一种变压器本体快速排油的控制方法,启动快速排油装置时需进行双重确认。本发明可进一步降低变压器故障后的火灾蔓延风险,对变压器防火安全有着极为重要的意义；该装置具有结构简单、便于安装和运输的特点,该装置还可以应用于常规交流变压器上,具有广泛的应用前景。(The invention relates to a quick oil discharge device for a transformer body, which comprises: the oil discharge pipeline structure is formed by connecting two pipelines in parallel, and an electric ball valve and a leakage monitor are respectively arranged on each pipeline; one end of the oil outlet after the two pipelines are connected in parallel and intersected is provided with a vacuum-pumping stop valve at the upper part of the intersected pipeline and a stop valve for oil injection at the lower part of the intersected pipeline. The invention also relates to a system and a method for controlling the quick oil discharge of the transformer body, and double confirmation is required when the quick oil discharge device is started. The invention can further reduce the fire spreading risk after the transformer fails, and has very important significance on the fire safety of the transformer; the device has the characteristics of simple structure and convenience in installation and transportation, can be applied to a conventional alternating current transformer, and has wide application prospect.)

1. The utility model provides a quick oil extraction device of transformer body which characterized in that includes: the oil discharge pipeline structure is formed by connecting two pipelines in parallel, and an electric ball valve and a leakage monitor are respectively arranged on each pipeline; one end of an oil discharge port after the two pipelines are connected in parallel and intersected is connected with an oil discharge pipe, the upper part of an intersection pipeline at the other end of the two pipelines which are connected in parallel and intersected is provided with a stop valve for vacuumizing, and the lower part of the intersection pipeline is provided with a stop valve for oil injection.

2. The quick oil drain device of the transformer body as claimed in claim 1, wherein the two pipelines are DN150 pipelines, the stop valve for vacuum pumping is DN25 stop valve for vacuum pumping, and the stop valve for oil injection is DN25 stop valve for oil injection.

3. The quick oil discharge device of transformer body according to claim 2, wherein said two pipes are made of common carbon steel, and said electric ball valve is made of stainless steel.

4. The transformer body rapid oil drainage device according to any one of claims 1 to 3, wherein the oil drainage pipeline structure formed by connecting two pipelines in parallel, the electric ball valve and the leakage monitor are all packaged in a fireproof shell.

5. The transformer body quick oil drain device of claim 4, wherein the side wall of the fireproof casing is provided with a terminal row.

6. The utility model provides a quick oil extraction control system of transformer body which characterized in that includes: the transformer body rapid oil discharge device of claim 5, which is arranged in a remote place and comprises an oil discharge control module, a control button box, a display module and a display screen, wherein the oil discharge control module, the display module and the display screen realize wireless remote communication with the rapid oil discharge device; and the display module and the display screen are used for displaying the state quantity of the far-end transformer body.

7. The system of claim 6, wherein the display module and the display screen display the status of the remote transformer body, including but not limited to: heavy gas signal, power-off signal, fire alarm signal, electric ball valve state, pipeline leakage, and the working environment temperature and humidity of the quick oil discharge device.

8. The system of claim 6, wherein the oil discharge control module, the display module and the display screen communicate with the quick oil discharge device via hard contacts.

9. A control method for realizing the rapid oil drainage of a transformer body by applying the rapid oil drainage control system of the transformer body as claimed in any one of claims 6 to 8 is characterized by comprising the following steps:

step 1, building a transformer body rapid oil discharge control system comprising a transformer body rapid oil discharge device, an oil discharge control module, a control button box, a display module and a display screen;

step 2, a primary main change-over switch is arranged for a group of transformers, and the primary main change-over switch is provided with three gears: the device is started, stopped and closed and is used for controlling the starting, stopping and closing of an electric ball valve in the quick oil drainage device; each transformer is provided with a secondary independent change-over switch which is provided with two gears: stopping and discharging oil, wherein the oil discharging device is used for controlling a power supply of the quick oil discharging device, the quick oil discharging device is not electrified when the oil discharging device is stopped, and the quick oil discharging device is electrified when the oil discharging device is discharged;

and 3, when the oil discharge control module receives a transformer body weight gas two-out signal, an alternating current field switch position division node and a transformer fire alarm signal which are input from the outside, carrying out AND logic judgment in the oil discharge control module, and when AND logic conditions are met, sending an alarm signal and starting the quick oil discharge device to realize quick oil discharge.

10. The method as claimed in claim 9, wherein the quick oil discharge device is activated by a double confirmation, that is: when the gear of the primary main change-over switch is opened and the gear of the secondary independent change-over switch is oil drainage, the quick oil drainage device is started to realize quick oil drainage.

Technical Field

The invention belongs to the technical field of transformer production and manufacturing, and particularly relates to a quick oil discharge device, a control system and a control method for a transformer body, which are particularly suitable for extra-high voltage alternating current and direct current transmission projects and are also suitable for conventional transformers.

Background

With the rapid development of a strong smart power grid in China, an oil-immersed power transformer is the key for realizing the normal operation of the power grid, and plays a role of 'heart' in a power system, once serious accidents such as fire disasters occur, the power grid in the whole area is broken down, and the loss is immeasurable.

However, the oil-immersed power transformer inevitably has a risk of generating arc discharge inside the transformer due to an operation overvoltage, a lightning overvoltage, an overload, and the like. Because the transformer oil tank is a totally-enclosed whole, combustible gas generated by discharge can be rapidly gathered in the oil tank, so that the internal pressure of the oil tank can be rapidly increased, and the pressure relief valve can not rapidly relieve pressure, thereby easily causing major accidents such as explosion and the like. Dozens of tons of combustible transformer oil are filled in the transformer, and once the transformer oil flows out in a large area, a major fire accident is caused, and major loss is caused.

Disclosure of Invention

In order to solve the technical problems, the invention provides a device, a control system and a control method for quickly discharging oil from a transformer body, which can remotely start oil discharge to realize quick transfer of transformer oil and quick transfer of the transformer oil in the transformer body to a safe oil pool according to judgment of fire conditions by field watchmen when a transformer is in a fire disaster, so that loss in the fire disaster is reduced to the maximum extent, and the device, the control system and the control method are very important means for preventing explosion of the transformer body and large-range fire accidents. The technical scheme adopted by the invention is as follows:

the utility model provides a quick oil extraction device of transformer body, includes: the oil discharge pipeline structure is formed by connecting two pipelines in parallel, and an electric ball valve and a leakage monitor are respectively arranged on each pipeline; one end of an oil discharge port after the two pipelines are connected in parallel and intersected is connected with an oil discharge pipe for discharging transformer oil into an oil pool, the upper part of the intersection pipeline at the other end of the two pipelines after the two pipelines are connected in parallel and intersected is provided with a stop valve for vacuumizing, and the lower part of the intersection pipeline is provided with a stop valve for oil injection.

Preferably, the two pipelines are DN150 pipelines, the stop valve for vacuumizing is a DN25 stop valve for vacuumizing, and the stop valve for oil injection is a DN25 stop valve for oil injection.

Preferably, the two pipelines are made of common carbon steel, and the electric ball valve is made of stainless steel.

Preferably, the oil discharge pipeline structure, the electric ball valve and the leakage monitor which are formed by connecting two pipelines in parallel are all packaged in the fireproof shell.

Preferably, the side wall of the fireproof shell is provided with a terminal strip.

A transformer body quick oil discharge control system comprises: the transformer body quick oil discharge device comprises an oil discharge control module, a control button box, a display module and a display screen which are arranged remotely, wherein the oil discharge control module, the display module and the display screen realize wireless remote communication with the quick oil discharge device; and the display module and the display screen are used for displaying the state quantity of the far-end transformer body.

Preferably, the state quantity of the far-end transformer body displayed by the display module and the display screen includes but is not limited to: heavy gas signal, power-off signal, fire alarm signal, electric ball valve state, pipeline leakage, and the working environment temperature and humidity of the quick oil discharge device.

Preferably, the oil discharge control module, the display screen and the quick oil discharge device are communicated in a hard contact mode.

A control method for quick oil discharge of a transformer body comprises the following steps:

step 1, building a transformer body rapid oil discharge control system comprising a transformer body rapid oil discharge device, an oil discharge control module, a control button box, a display module and a display screen;

step 2, a primary main change-over switch is arranged for a group of transformers, and the primary main change-over switch is provided with three gears: the device is started, stopped and closed and is used for controlling the starting, stopping and closing of an electric ball valve in the quick oil drainage device; each transformer is provided with a secondary independent change-over switch which is provided with two gears: stopping and discharging oil, wherein the oil discharging device is used for controlling a power supply of the quick oil discharging device, the quick oil discharging device is not electrified when the oil discharging device is stopped, and the quick oil discharging device is electrified when the oil discharging device is discharged;

and 3, when the oil discharge control module receives a transformer body weight gas two-out signal, an alternating current field switch position division node and a transformer fire alarm signal which are input from the outside, carrying out AND logic judgment in the oil discharge control module, and when AND logic conditions are met, sending an alarm signal and starting the quick oil discharge device to realize quick oil discharge.

Preferably, the quick oil drain device is activated with a double confirmation, namely: when the gear of the primary main change-over switch is opened and the gear of the secondary independent change-over switch is oil drainage, the quick oil drainage device is started to realize quick oil drainage.

The invention has the beneficial effects that:

the invention can further reduce the fire spreading risk after the transformer fails, forms a scientific, safe and reliable system together with other fire extinguishing measures of the transformer, reduces the loss when an accident occurs, and has very important significance on the fire safety of the transformer. Meanwhile, the device has the characteristics of simple structure and convenience in installation and transportation, can be applied to a conventional alternating current transformer, and has wide application prospect.

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 specific embodiments of the invention, and that other drawings within the scope of the present application can be obtained by those skilled in the art without inventive effort.

FIG. 1 is a side view of a quick drain of an embodiment of the present invention;

FIG. 2 is a top view of a quick drain of an embodiment of the present invention;

in the figure, 1-a fireproof shell, 2-DN 150 pipelines, 3-an electric ball valve, 4-a leakage detector, 5-a DN25 stop valve for vacuumizing and 6-a DN25 stop valve for oil injection.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a side view of a quick oil discharge device according to an embodiment of the present invention; fig. 2 is a top view of the quick oil drainage device according to the embodiment of the present invention. The utility model provides a quick oil extraction device of transformer body, includes: the oil discharge pipeline structure is formed by connecting two DN150 pipelines 2 in parallel, and an electric ball valve 3 and a leakage monitor 4 are respectively arranged on each DN150 pipeline 2. One end of an oil discharge port of the two DN150 pipelines 2 after being connected in parallel and intersected is connected with an oil discharge pipe and used for discharging transformer oil into an oil pool; at the other end of the two paths of DN150 pipelines 2 after being connected in parallel and intersected, the upper part and the lower part of the intersection pipeline are respectively led out of a pipe joint, the upper part of the intersection pipeline is provided with a DN25 stop valve 5 for vacuumizing of an oil discharge pipeline, and the lower part of the intersection pipeline is provided with a DN25 stop valve 6 for oil injection. The oil discharging is that the oil in the transformer body is discharged after the transformer is fired, and the oil filling is to fill the transformer oil into an oil discharging pipeline connected to the transformer body so as to avoid the oil level of the transformer in the transformer body from dropping. And finally, directly connecting one end of the stop valve to a DN150 oil discharge valve (or a valve connected to a plurality of small-caliber oil discharge valves in parallel) reserved on the transformer body through a transition connecting pipe, and arranging the quick oil discharge device on one side of the transformer, close to the accident oil discharge valve and far away from the high-voltage bushing.

In the embodiment of the invention, a pipeline structure formed by connecting two DN150 pipelines 2 in parallel, the electric ball valve 3 and the leakage monitor 4 are all packaged in the fireproof shell 1, and the side wall of the fireproof shell 1 is provided with a terminal row, so that power supply and signal connection of the electric ball valve 3 and the leakage monitor 4 are facilitated. The signal wiring refers to the state signal wiring of the electric ball valve 3 and the leakage detector 4, and uniformly leads the signal wire and the power wire to the terminal strip on the side wall, so that the subsequent wiring operation of the quick oil discharge device is facilitated. The fireproof casing 1 is arranged, so that the fireproof safety performance of the quick oil discharge device can be effectively guaranteed.

In the embodiment of the invention, the quick oil discharge device comprises 2 leakage detectors 4, 2 electric ball valves 3 and 2 DN25 stop valves. The electric ball valve 3 is made of stainless steel, and the DN150 pipeline is made of common carbon steel. DN150 and DN25 are the limit to the size of fittings such as pipelines and stop valves, and the fittings with the caliber are selected in the quick oil drainage device, so that the fittings which are most economical and reliable to use are used on the basis of meeting the requirement of quick oil drainage. The leakage monitor 4 is an existing product, monitors whether oil leaks in a transformer pipeline, automatically sends an alarm signal to a background monitoring system after oil leaks, transmits the alarm signal in a hard contact mode, and monitored data are used for guiding operation and maintenance personnel to perform pipeline inspection and maintenance so as to avoid faults caused by excessive oil leakage of the transformer.

In the embodiment of the invention, the oil discharge pipe connected with one end of the oil discharge port is a section of metal hose, the metal hose is arranged mainly in consideration of the problem of assembly error, and the metal hose is adjustable and convenient to install.

In the embodiment of the invention, the quick oil discharge device is directly connected to a DN150 oil discharge valve reserved on the transformer body. During installation, under the condition that the oil drain valve of the transformer body is closed, the transition connecting pipe is connected, then the quick oil drain device is connected, and finally the pipeline between the quick oil drain device and the oil collecting pit is connected. The electric ball valve 3 of the quick oil discharging device adopts a remote manual electric starting mode, and when the necessary condition of oil discharging is met, the electric ball valve 3 is manually started to start oil discharging. When oil is discharged, transformer oil passes through the oil discharge valve of the transformer body and passes through the quick oil discharge device, and then is led to the oil collection pit position in the transformer oil pit through the oil discharge pipeline. During oil discharge, auxiliary means is not needed, the transformer body is discharged through the default oil tank opening, the height of the oil tank is about 10 m, and quick oil discharge can be realized by simply utilizing 10 m of clean oil pressure.

A transformer body quick oil discharge control system comprises: quick oil extraction device of transformer body sets up in oil extraction control module, control button case, display module and the display screen in a distant place, oil extraction control module, display module and display screen realize wireless remote communication with quick oil extraction device, oil extraction control module is connected with the button case electricity, controls oil extraction control module through the button case and sends control signal to the quick oil extraction device's of distal end electric ball valve 3 for start electric ball valve 3. The display module and the display screen are used for displaying the state quantities of the heavy gas signal, the power-off signal, the fire alarm signal, the ball valve state, the pipeline leakage, the working environment temperature and humidity of the quick oil discharge device and the like of the far-end transformer body. The heavy gas signal and the power-off signal are self-owned signals of the transformer, the fire alarm signal is obtained from a fire-fighting system of the convertor station, and the state quantities of the ball valve state, the pipeline leakage state, the working environment temperature and humidity of the quick oil discharge device and the like are signals of the convertor transformer quick oil discharge system. The oil discharge control module, the display screen and the quick oil discharge device are communicated in a hard contact mode, and reliable transmission is guaranteed. The above-mentioned wireless telecommunication and the technology for starting the electric ball valve 3 are all the prior art, and are not described herein again.

A control method for quick oil discharge of a transformer body comprises the following steps:

step 1, building a transformer body rapid oil discharge control system comprising a transformer body rapid oil discharge device, an oil discharge control module, a control button box, a display module and a display screen;

step 2, a primary main change-over switch is arranged for a group of transformers in the control button box, and the primary main change-over switch is provided with three gears: the device is opened, stopped and closed and is used for controlling the opening, the stopping and the closing of an electric ball valve 3 in the quick oil discharge device; each transformer is provided with a secondary independent change-over switch which is provided with two gears: the system comprises a stop device and an oil discharge device, wherein the stop device and the oil discharge device are used for controlling a power supply of the quick oil discharge device;

and 3, when the oil discharge control module receives a transformer body heavy gas two-out-of-three signal (the transformer body heavy gas contains three tripping signal nodes, and when two or more signal contacts act, the action of the heavy gas is considered to occur, and the action is a redundant means for ensuring reliability), an alternating current field switch position division node (which means that an alternating current field breaker is disconnected, namely, a current conversion transformer loses power) and a transformer fire alarm signal, after AND logic judgment is carried out in the oil discharge control module, when AND logic conditions are met (after the AND logic judgment is carried out, the AND logic conditions are all met, and the AND logic conditions are not met when none of the AND logic conditions occurs), an alarm signal is sent out, and the quick oil discharge device is started to realize quick oil discharge.

In the embodiment of the invention, when the quick oil discharge device is started, double confirmation is required to be carried out through the control button box, namely: when the gear of the primary main change-over switch is turned on and the gear of the secondary independent change-over switch is turned off, the quick oil discharge device is started to realize quick oil discharge.

Finally, it is to be noted that: the above examples 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 depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein.