Transformer oil inlet gas collection device, gas detection system

Abstract

The present invention provides a gas collecting device and a gas detection system for the oil inlet of a transformer. The gas collecting tank of the gas collecting device for the oil inlet of the transformer is hollow inside; the two ends of the oil inlet pipe of the gas collecting structure are respectively connected to the oil inlet end and the oil return module of the transformer, one end of the air inlet pipe is connected to the middle of the oil inlet pipe, and the other end is connected to the gas collecting tank, and the gas blocking structure is arranged at the end where the air inlet pipe is connected to the oil inlet pipe; one end of the liquid level meter is fixed inside the gas collecting tank, and the other end extends to the outside of the gas collecting tank; the main control module is connected to the liquid level meter, works after receiving an alarm signal, collects liquid level information through the liquid level meter, and sends the alarm signal and liquid level information to a background server. The present invention can prevent air from entering the interior of the transformer to damage the transformer, prevent the gas relay from frequently working due to external air, improve the reliability of power supply, and can promptly send out the transformer with problems, reduce the troubleshooting time, and improve the safe and reliable operation level of the transformer.

Description

Technical Field

[0001] The invention relates to the field of transformer gas detection, and in particular to a transformer oil inlet gas collecting device and a gas detection system. Background Art

[0002] The transformer is one of the most important equipment in the power system. Its operating condition will directly affect the reliability of power supply. With the rapid development of the national economy, society is increasingly dependent on power supply. Therefore, it is of great significance to improve the safe and reliable operation level of the transformer.

[0003] There are some oil inlet pipes in the transformer, such as the oil return pipe of the oil chromatogram online monitoring device, the oil return pipe of the oil filter, etc. If these return pipes leak oil, coupled with the pressure of the return oil, it is possible that outside air will enter the transformer, which will cause the gas relay to operate. After the gas relay is activated, it takes a lot of time to check the reasons for the power outage one by one and cut off the power to the transformer, which affects the power supply reliability and cannot improve the safe and reliable operation level of the transformer. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention proposes a gas collecting device and a gas detection system at the oil inlet of a transformer. A gas collecting structure and a gas collecting tank are arranged on the oil inlet pipeline of the transformer, so as to collect the air on the oil inlet pipeline, prevent the air from entering the inside of the transformer and damaging the transformer, prevent the gas relay from frequently working due to external air, and improve the power supply reliability. Moreover, the liquid level information inside the gas collecting tank is detected by a liquid level gauge, and an alarm is issued according to the liquid level information, so that the transformer with problems can be promptly sent out, thereby reducing the troubleshooting time and improving the safe and reliable operation level of the transformer.

[0005] To solve the above problems, a technical solution adopted by the present invention is as follows: the gas collecting device at the oil inlet of the transformer comprises: a gas collecting tank, a gas collecting structure, a liquid level gauge and a main control module, the gas collecting tank is hollow inside, and the gas is collected by the gas collecting tank; the gas collecting structure comprises an oil inlet pipe, an air inlet pipe and an air blocking structure, the two ends of the oil inlet pipe are respectively connected to the oil inlet end and the oil return module of the transformer, one end of the air inlet pipe is connected to the middle part of the oil inlet pipe, and the other end is connected to the gas collecting tank, the air blocking structure is arranged at the end where the air inlet pipe is connected to the oil inlet pipe, and the gas in the oil inlet pipe is guided to the air inlet pipe through the air blocking structure; one end of the liquid level gauge is fixed inside the gas collecting tank, and the other end extends to the outside of the gas collecting tank, and is used to detect the liquid level inside the gas collecting tank, and send an alarm signal when the liquid level is lower than a preset value; the main control module is connected to the liquid level gauge, works after receiving the alarm signal, collects liquid level information through the liquid level gauge, and sends the alarm signal and liquid level information to the background server.

[0006] Furthermore, the main control module also includes a control circuit board, which is arranged on a side of the gas collecting tank away from the gas collecting structure, and includes a single-chip microcomputer. After receiving the alarm signal, the main control module wakes up the single-chip microcomputer and sends the alarm signal to the background server through the single-chip microcomputer.

[0007] Furthermore, the main control module also includes a wireless communication circuit, the single chip microcomputer is connected to the wireless communication circuit, and the alarm signal is sent to the background server through the wireless communication circuit.

[0008] Furthermore, the main control module also includes an oxygen sensor, the single chip microcomputer is connected to the oxygen sensor, the gas composition information inside the gas collecting tank is collected through the oxygen sensor, and the gas composition information is sent to the background server.

[0009] Furthermore, the transformer oil inlet gas collecting device also includes a power supply, and the power supply includes a battery. The battery is arranged on one side of the control circuit board, and the main control module is supplied with power through the battery.

[0010] Furthermore, the transformer oil inlet gas collecting device also includes a protective cover, which is fixed to a side of the gas collecting tank away from the gas collecting structure, and the liquid level meter and the main control module are arranged inside the protective cover.

[0011] Furthermore, the transformer oil inlet gas collecting device also includes a warning light, which is connected to the main control module and sends out an alarm signal through the warning light.

[0012] Furthermore, the transformer oil inlet gas collecting device also includes an exhaust valve, which is arranged on a side of the gas collecting tank away from the gas collecting structure and is connected to the gas collecting tank, and the air inside the gas collecting tank is discharged through the exhaust valve.

[0013] Furthermore, the transformer oil inlet gas collecting device also includes a control valve, which is arranged on the air inlet pipe and located between the air blocking structure and the air collecting tank.

[0014] Based on the same inventive concept, the present invention also proposes a gas detection system, which includes a transformer, a transformer oil inlet gas collecting device, and a background server. The transformer oil inlet gas collecting device is respectively connected to the transformer and the background server, and includes the transformer oil inlet gas collecting device as described above.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: an air collecting structure and an air collecting tank are arranged on the oil inlet pipeline of the transformer, so as to collect the air on the oil inlet pipeline, prevent the air from entering the transformer and damaging the transformer, prevent the gas relay from frequently working due to external air, and improve the power supply reliability. Moreover, the liquid level information inside the air collecting tank is detected by a liquid level gauge, and an alarm is issued according to the liquid level information, so that the transformer with problems can be promptly reported, thereby reducing the troubleshooting time and improving the safe and reliable operation level of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of an embodiment of a gas collecting device for an oil inlet of a transformer according to the present invention;

[0017] Figure 2 It is a cross-sectional view of a partial structure of a gas collecting device for an oil inlet of a transformer according to the present invention, cut along the axial direction of an oil inlet pipe;

[0018] Figure 3 It is a side view of a partial structure of an embodiment of a gas collecting device for an oil inlet of a transformer according to the present invention;

[0019] Figure 4 It is a structural diagram of an embodiment of a protective cover and a warning light of a gas collecting device at an oil inlet of a transformer according to the present invention;

[0020] Figure 5 It is a structural diagram of an embodiment of a gas detection system of the present invention.

[0021] In the figure: 1. Gas collecting structure; 2. Gas collecting tank; 3. Liquid level gauge; 4. Main control module; 5. Oil inlet end; 6. Oil return module; 7. Exhaust valve; 11. Oil inlet pipe; 12. Air inlet pipe; 13. Gas blocking structure; 41. Control circuit board; 42. Antenna; 9. Control valve. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0023] See also Figure 1-4 ,in, Figure 1 It is a structural diagram of an embodiment of a gas collecting device for an oil inlet of a transformer according to the present invention; Figure 2 It is a cross-sectional view of a partial structure of a gas collecting device for an oil inlet of a transformer according to the present invention, cut along the axial direction of an oil inlet pipe; Figure 3 It is a side view of a partial structure of an embodiment of a gas collecting device for an oil inlet of a transformer according to the present invention; Figure 4 This is a structural diagram of an embodiment of a protective cover and a warning light of a gas collecting device for an oil inlet of a transformer according to the present invention, wherein: Figure 1The protective cover is not installed on the gas tank. Figure 1-4 The gas collecting device for the oil inlet of the transformer of the present invention is described in detail.

[0024] In this embodiment, the gas collecting device at the oil inlet of the transformer includes: a gas collecting tank 2, a gas collecting structure 1, a liquid level meter 3 and a main control module 4. The gas collecting tank 2 is hollow inside and the gas is collected by the gas collecting tank 2; the gas collecting structure 1 includes an oil inlet pipe 11, an air inlet pipe 12 and a gas blocking structure 13. The two ends of the oil inlet pipe 11 are respectively connected to the oil inlet end 5 and the oil return module 6 of the main transformer, one end of the air inlet pipe 12 is connected to the middle part of the oil inlet pipe 11, and the other end is connected to the gas collecting tank 2. The gas blocking structure 13 is arranged at One end of the air inlet pipe 12 is connected to the oil inlet pipe 11, and the gas in the oil inlet pipe 11 is guided to the air inlet pipe 12 through the gas blocking structure 13; one end of the liquid level meter 3 is fixed inside the gas collecting tank 2, and the other end extends to the outside of the gas collecting tank 2, and is used to detect the liquid level inside the gas collecting tank 2, and send an alarm signal when the liquid level is lower than a preset value; the main control module 4 is connected to the liquid level meter 3, works after receiving the alarm signal, collects the liquid level information through the liquid level meter 3, and sends the alarm signal and liquid level information to the background server.

[0025] In other embodiments, the transformer oil inlet gas collecting device may also be connected to a user terminal and send liquid level information and an alarm signal to the user terminal.

[0026] In this embodiment, the shape of the gas collecting tank 2 is cylindrical. In other embodiments, the shape of the gas collecting tank 2 can also be a cuboid, a prism, or other regular or irregular shapes. The specific shape can be set according to user needs and is not limited here.

[0027] In this embodiment, the transformer is a main transformer, the oil inlet end 5 is the oil inlet flange of the transformer, the oil return module 6 is the oil chromatogram return flange, and the gas collecting structure 1 is the structural flange, through which the transformer is connected to the oil return structure of the oil chromatogram online monitoring device.

[0028] In this embodiment, the air-blocking structure 13 includes an air-blocking steel sheet, which is fixed inside the air intake pipe 12, connected to the inner side of the air intake pipe 12 on both sides, and extends to the inside of the oil inlet pipe 11 at one end, and is located at the upper end of the oil inlet pipe 11. Through the pressure and the blocking effect of the air-blocking steel sheet, the air that may exist inside the oil inlet pipe 11 enters the air intake pipe 12.

[0029] In this embodiment, the liquid level meter 3 is connected to the main control module 4 by wire, and sends an alarm signal and liquid level information to the main control module 4 by wired connection. In other embodiments, the liquid level meter 3 and the main control module 4 may also be connected wirelessly.

[0030] In this embodiment, the size of the preset value can be set according to the capacity of the gas collecting tank 2 and the design requirements of the user, and is not limited here.

[0031] In this embodiment, the main control module 4 also includes a control circuit board 41, which is arranged on the side of the gas collecting tank 2 away from the gas collecting structure 1, and includes a single-chip microcomputer. After receiving the alarm signal, the main control module 4 wakes up the single-chip microcomputer and sends the alarm signal to the background server through the single-chip microcomputer.

[0032] In this embodiment, the single-chip microcomputer is a low-power STM32Lx series single-chip microcomputer as the main chip, which is usually in a sleep state. When the alarm signal of the liquid level meter 3 is output, the single-chip microcomputer is awakened to work.

[0033] In this embodiment, the wake-up circuit for waking up the microcontroller can be set inside the microcontroller or independently of the microcontroller. The wake-up circuit only needs to be connected to the liquid level meter 3 and wake up the microcontroller after receiving the alarm signal. No limitation is made here.

[0034] In a specific embodiment, the control circuit board 41 is vertically fixed on a side of the gas collecting tank 2 away from the gas collecting structure 1 .

[0035] In this embodiment, the main control module 4 also includes a wireless communication circuit, the single chip is connected to the wireless communication circuit, and the alarm signal is sent to the background server through the wireless communication circuit. The wireless communication circuit includes an antenna 42 arranged on a side of the control circuit board 41 away from the liquid level meter 3.

[0036] In this embodiment, the wireless communication circuit includes any one of Bluetooth, LORA, WiFi, ZigBee, 2G, 3G, 4G and other wireless communication circuits. The main control module 4 is connected to the background server through the wireless communication circuit.

[0037] In a specific embodiment, the background server is arranged in the main control room of the substation, the wireless communication circuit is a LORA communication circuit, and the transformer oil inlet gas collecting device is connected to the background server via the LORA communication circuit.

[0038] In this embodiment, the main control module 4 also includes an oxygen sensor, and the single chip is connected to the oxygen sensor. The oxygen sensor collects the gas composition information inside the gas collecting tank 2 and sends the gas composition information to the backend server. The oxygen sensor is used to detect the oxygen information inside the gas collecting tank 2, and it is determined whether the outside air enters the gas collecting tank 2 according to the oxygen information.

[0039] In this embodiment, the transformer oil inlet gas collecting device also includes a power supply, which includes a battery. The battery is arranged on one side of the control circuit board 41, away from the control circuit board 41 relative to the liquid level meter 3, and supplies power to the main control module 4 through the battery.

[0040] In this embodiment, the power supply also includes a solar power supply circuit, which is connected to a battery to charge the battery and improve the endurance of the gas collecting device at the oil inlet of the transformer.

[0041] In this embodiment, the transformer oil inlet gas collecting device further comprises a protective cover, which is fixed to the side of the gas collecting tank 2 away from the gas collecting structure 1, and the liquid level meter 3 and the main control module 4 are arranged inside the protective cover.

[0042] The connection between the gas collecting tank 2 and the protective cover is provided with a boss which matches the inner side of the protective cover, and the protective cover is fixed on the boss.

[0043] In this embodiment, the protective cover is cylindrical and is fixed on the gas collecting tank 2 by screwing in, snapping, buckling or any other fixing method.

[0044] In this embodiment, the gas collecting device at the oil inlet of the transformer further includes a warning light, which is connected to the main control module 4 and sends out a warning signal through the warning light.

[0045] The warning light may be an LED light, a light emitting diode or other light emitting devices, wherein the warning light may send out a warning signal through its light emitting frequency, light color or a combination of light emitting frequency and light color.

[0046] In this embodiment, the transformer oil inlet gas collecting device further includes an exhaust valve 7 , which is arranged on the side of the gas collecting tank 2 away from the gas collecting structure 1 and is connected to the gas collecting tank 2 , and the air inside the gas collecting tank 2 is discharged through the exhaust valve 7 .

[0047] Among them, the exhaust valve 7 can be manually controlled or can be an electromagnetic exhaust valve 7. The main control module 4 is connected to the electromagnetic exhaust valve 7, and controls the electromagnetic exhaust valve 7 to exhaust according to the liquid level information sent by the liquid level meter 3 or the exhaust instruction received by the wireless communication circuit.

[0048] In this embodiment, the transformer oil inlet gas collecting device further comprises a control valve 9, which is arranged on the air inlet pipe 12 and located between the air blocking structure 13 and the gas collecting tank 2. The control valve 9 controls the communication state between the gas collecting tank 2 and the oil inlet pipe 11.

[0049] In a specific embodiment, the control valve 9 is a manual ball valve.

[0050] Beneficial effect: The transformer oil inlet gas collecting device of the present invention is provided with a gas collecting structure and a gas collecting tank on the oil inlet pipeline of the transformer, which can collect the air on the oil inlet pipeline, prevent the air from entering the transformer and damaging the transformer, prevent the gas relay from frequently working due to external air, and improve the power supply reliability. Moreover, the liquid level information inside the gas collecting tank is detected by a liquid level gauge, and an alarm is issued according to the liquid level information, so that the transformer with problems can be promptly sent out, which reduces the troubleshooting time and improves the safe and reliable operation level of the transformer.

[0051] Based on the same inventive concept, the present invention also proposes a gas detection system, see Figure 5 , Figure 5 The structure diagram of the gas detection system of the present invention is shown in FIG. Figure 5 The gas detection system of the invention will be described.

[0052] In this embodiment, the gas detection system includes a transformer, a transformer oil inlet gas collection device, and a background server, and the transformer oil inlet gas collection device is connected to the transformer and the background server respectively. Among them, the transformer oil inlet gas collection device includes the transformer oil inlet gas collection device as described in the above embodiment.

[0053] In other embodiments, the transformer oil inlet gas collecting device may also be connected to a user terminal and send liquid level information and an alarm signal to the user terminal.

[0054] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A gas collecting device for oil inlet of a transformer, characterized in that: The transformer oil inlet gas collecting device comprises: a gas collecting tank, a gas collecting structure, a liquid level meter and a main control module. The gas collecting tank is hollow inside and contains gas; The gas collecting structure includes an oil inlet pipe, an air inlet pipe and an air blocking structure, the two ends of the oil inlet pipe are respectively connected to the oil inlet end and the oil return module of the transformer, one end of the air inlet pipe is connected to the middle part of the oil inlet pipe, and the other end is connected to the air collecting tank, the air blocking structure is arranged at the end where the air inlet pipe is connected to the oil inlet pipe, and the gas in the oil inlet pipe is guided to the air inlet pipe through the air blocking structure; the air blocking structure includes an air blocking steel sheet, the air blocking steel sheet is fixed inside the air inlet pipe, the two sides of the air blocking steel sheet are connected to the inner side of the air inlet pipe, one end extends to the inside of the oil inlet pipe, and is located at the upper end inside the oil inlet pipe; One end of the liquid level meter is fixed inside the gas collecting tank, and the other end extends to the outside of the gas collecting tank, and is used to detect the liquid level inside the gas collecting tank and send out an alarm signal when the liquid level is lower than a preset value; The main control module is connected to the liquid level meter, operates after receiving the alarm signal, collects liquid level information through the liquid level meter, and sends the alarm signal and liquid level information to the background server.

2. The transformer oil inlet gas collecting device according to claim 1, characterized in that: The main control module also includes a control circuit board, which is arranged on a side of the gas collecting tank away from the gas collecting structure and includes a single-chip microcomputer. The main control module wakes up the single-chip microcomputer after receiving the alarm signal and sends the alarm signal to the background server through the single-chip microcomputer.

3. The transformer oil inlet gas collecting device according to claim 2, characterized in that: The main control module also includes a wireless communication circuit, the single chip microcomputer is connected to the wireless communication circuit, and the alarm signal is sent to a background server through the wireless communication circuit.

4. The transformer oil inlet gas collecting device according to claim 2, characterized in that: The main control module also includes an oxygen sensor. The single chip microcomputer is connected to the oxygen sensor. The oxygen sensor is used to collect gas composition information inside the gas collecting tank and send the gas composition information to a background server.

5. The transformer oil inlet gas collecting device according to claim 2, characterized in that: The transformer oil inlet gas collecting device also includes a power supply, and the power supply includes a battery. The battery is arranged on one side of the control circuit board, and the main control module is supplied with power through the battery.

6. The transformer oil inlet gas collecting device according to claim 1, characterized in that: The transformer oil inlet gas collecting device further comprises a protective cover, which is fixed to the gas collecting tank at a side away from the gas collecting structure, and the liquid level meter and the main control module are arranged inside the protective cover.

7. The transformer oil inlet gas collecting device according to claim 6, characterized in that: The transformer oil inlet gas collecting device also includes a warning light, which is connected to the main control module and sends out a warning signal through the warning light.

8. The transformer oil inlet gas collecting device according to claim 1, characterized in that: The transformer oil inlet gas collecting device also includes an exhaust valve, which is arranged on a side of the gas collecting tank away from the gas collecting structure and is connected to the gas collecting tank. The air inside the gas collecting tank is discharged through the exhaust valve.

9. The transformer oil inlet gas collecting device according to claim 1, characterized in that: The transformer oil inlet gas collecting device also includes a control valve, which is arranged on the air inlet pipe and located between the air blocking structure and the air collecting tank.

10. A gas detection system, characterized in that: The gas detection system includes a transformer, a gas collection device at the transformer oil inlet, and a background server. The gas collection device at the transformer oil inlet is connected to the transformer and the background server respectively, and includes the transformer oil inlet gas collection device as described in any one of claims 1-9.

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