CN115493778A - Main transformer nitrogen injection pressurization monitoring device - Google Patents
Main transformer nitrogen injection pressurization monitoring device Download PDFInfo
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- CN115493778A CN115493778A CN202211123863.9A CN202211123863A CN115493778A CN 115493778 A CN115493778 A CN 115493778A CN 202211123863 A CN202211123863 A CN 202211123863A CN 115493778 A CN115493778 A CN 115493778A
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- Prior art keywords
- transformer
- nitrogen
- pressure
- box body
- connecting pipe
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/30—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds using progressive displacement of one fluid by another
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a main transformer nitrogen injection pressurization monitoring device which comprises a box body, an air inlet interface, an air outlet interface, a solenoid valve, a connecting pipe, a pressure sensor, a control module and a power supply, wherein the box body is provided with a gas inlet and a gas outlet; the right side of the box body is provided with an air inlet interface and an air outlet interface; the connecting pipe is arranged in the box body, one end of the connecting pipe is connected with the air inlet interface, and the other end of the connecting pipe is connected with the air outlet interface; the body of the connecting pipe is provided with an electromagnetic valve and a pressure sensor; the top surface in the box body is provided with a control module, and the side surface in the box body is provided with a power supply; the electromagnetic valve and the pressure sensor are respectively connected with the control module through leads. According to the invention, the pressure sensor is arranged to monitor the pressure of the nitrogen filled in the transformer in real time, and workers can accurately know the pressure of the nitrogen filled in the transformer and the leakage condition inside the transformer body, so that the tightness inspection work of the transformer is faster and more accurate.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to a main transformer nitrogen injection pressurization monitoring device.
Background
The transformer is mainly used for meeting voltage exchange among power grids with different voltage grades, and plays a vital role in a power system. If the transformer is not well sealed, particularly in heavy rain, rainwater can enter the interior of the transformer through accessories such as oil conservators and sleeves and enter the winding insulation along the lead, the more the entering water is accumulated, the internal insulation is affected with damp, the insulation strength between windings is reduced, and in severe cases, insulation breakdown causes short-circuit tripping. Therefore, the transformer needs to be subjected to tightness inspection, and potential safety hazards are eliminated. The method used in the prior stage is to inject nitrogen into the transformer, inject the nitrogen to a certain pressure value, observe whether the display changes after a period of time after the pressure value is stable, and simultaneously spray foam water on the sealing part of the body to check whether the gas leaks. When nitrogen is injected into the transformer, the nitrogen is connected to the exhaust pipe of the transformer from the bottle through a pipeline with a pressure reducing valve. The discharge amount of the injected nitrogen is controlled by a pressure reducing valve, and the pressure of the nitrogen cylinder is displayed on the pressure reducing valve. The nitrogen injected into the main transformer cannot be well monitored, and whether the nitrogen is continuously output from the cylinder can be judged only by observing the stability of the indication on the pressure reducing valve. Therefore, the accuracy, the real-time performance and the working efficiency of nitrogen injection work are influenced to a certain extent.
Disclosure of Invention
In order to solve the problems, the invention provides a main transformer nitrogen injection pressurization monitoring device, so that a worker can accurately know the pressure of nitrogen gas filled in a transformer and the leakage condition inside a transformer body, and the tightness checking work of the transformer is quicker and more accurate.
The invention adopts the following technical scheme:
a main transformer nitrogen injection pressurization monitoring device comprises a box body, an air inlet interface, an air outlet interface, a solenoid valve, a connecting pipe, a pressure sensor, a control module and a power supply;
the right side of the box body is provided with an air inlet interface and an air outlet interface; the connecting pipe is arranged in the box body, one end of the connecting pipe is connected with the air inlet interface, and the other end of the connecting pipe is connected with the air outlet interface; the body of the connecting pipe is provided with an electromagnetic valve and a pressure sensor; the top surface in the box body is provided with a control module, and the side surface in the box body is provided with a power supply; the electromagnetic valve and the pressure sensor are respectively connected with the control module through leads.
The control module is a single chip microcomputer, receives nitrogen pressure data detected by the pressure sensor in real time and controls the opening and closing of the electromagnetic valve. The power supply is a storage battery and provides electric energy for the control module, the pressure sensor and the electromagnetic valve. When in use, the device is arranged between the pressure reducing valve and the transformer. The air inlet interface is connected with the pressure reducing valve through an air pipe, and the air outlet interface is connected with the transformer through an air pipe. When a worker fills nitrogen into the transformer, the electromagnetic valve is in an open state; and the nitrogen flows out of the pressure reducing valve, flows into the connecting pipe through the air inlet interface, flows out of the connecting pipe through the air outlet interface and is finally filled into the transformer.
The invention further discloses that a display module and a switch are arranged on the front surface of the box body; the display module and the switch are respectively connected with the control module through leads. The switch is used for controlling the on-off of the device; the display module be the touch-control screen, the staff can set for the pressure value of aerifing of transformer end and look over the inside nitrogen gas pressure value of transformer through display module control solenoid valve.
The invention further discloses that the pressure sensor is arranged on one side of the connecting pipe close to the air outlet interface; the electromagnetic valve is arranged on one side of the connecting pipe close to the air inlet interface. The pressure sensor is arranged on one side, close to the air outlet interface, of the connecting pipe, the electromagnetic valve is arranged on one side, close to the air inlet interface, of the connecting pipe, and when the electromagnetic valve is closed, the pressure sensor measures the pressure value of nitrogen inside the transformer, so that the accuracy of measured data is guaranteed.
The invention further discloses that a hook is arranged on the back of the box body. The hook arranged on the back of the box body facilitates the user to take the box body and hang the box body on the rope, so that the device is more convenient to use.
The use method of the main transformer nitrogen injection pressurization monitoring device comprises the following steps:
1) Connecting an air inlet interface on the side surface of the box body with a pressure reducing valve, and connecting an air outlet interface with a transformer; setting a nitrogen pressure inflation value and a nitrogen pressure leakage value through a control module;
2) Opening the pressure reducing valve, opening the electromagnetic valve and filling nitrogen into the transformer; when the pressure sensor detects that the pressure of the nitrogen inside the transformer reaches the nitrogen pressure inflation value, the electromagnetic valve is closed; the pressure sensor continues to detect the nitrogen pressure in the transformer; if the pressure sensor detects that the pressure of the nitrogen inside the transformer is basically unchanged, the transformer is well sealed; if the pressure sensor detects that the pressure of the nitrogen inside the transformer is reduced along with the time, the transformer leaks;
3) When the transformer leaks, the pressure sensor continues to detect the nitrogen pressure in the transformer; and when the nitrogen pressure in the transformer is reduced to the nitrogen pressure leakage value, the electromagnetic valve is opened, the nitrogen is continuously filled into the transformer to the nitrogen pressure filling value, and the time for reducing the nitrogen pressure in the transformer from the nitrogen pressure filling value to the nitrogen pressure leakage value is recorded.
The leakage condition of the transformer can be judged according to the time for reducing the nitrogen pressure in the transformer from the nitrogen pressure inflation value to the nitrogen pressure leakage value; the shorter the time for the nitrogen pressure inside the transformer to decrease from the nitrogen pressure charge value to the nitrogen pressure leakage value, the more serious the leakage of the transformer.
The invention has the advantages that:
the pressure of nitrogen filled in the transformer is monitored in real time by installing the pressure sensor; and the pressure data of the nitrogen gas detected by the pressure sensor in real time is received by the control module, and the opening and closing of the electromagnetic valve are controlled, so that a worker can accurately know the pressure of the nitrogen gas filled in the transformer and the leakage condition inside the transformer body, and the tightness inspection work of the transformer is quicker and more accurate. In addition, the invention is also provided with a display module, and workers can control the electromagnetic valve through the display module, set the air inflation pressure value of the transformer end and directly check the pressure value of the nitrogen gas inflated into the transformer, so that the whole tightness checking process is more visual through digital display feedback.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a partial cross-sectional view of the present invention.
The attached drawings are as follows:
the device comprises a box body 1, an air inlet 2, an air outlet 3, a switch 4, an electromagnetic valve 5, a connecting pipe 6, a pressure sensor 7, a control module 8, a power supply 9, a hook 10 and a display module 11.
Detailed Description
The invention is further illustrated below with reference to specific embodiments and the accompanying drawings.
Example 1:
the main transformer nitrogen injection pressurization monitoring device comprises a box body 1, an air inlet interface 2, an air outlet interface 3, an electromagnetic valve 5, a connecting pipe 6, a pressure sensor 7, a control module 8 and a power supply 9;
an air inlet interface 2 and an air outlet interface 3 are arranged on the right side of the box body 1; the connecting pipe 6 is arranged in the box body 1, one end of the connecting pipe is connected with the air inlet interface 2, and the other end of the connecting pipe is connected with the air outlet interface 3; the body of the connecting pipe 6 is provided with an electromagnetic valve 5 and a pressure sensor 7; the top surface in the box body 1 is provided with a control module 8, and the side surface in the box body 1 is provided with a power supply 9; the electromagnetic valve 5 and the pressure sensor 7 are respectively connected with the control module 8 through leads.
The working principle of the embodiment is as follows:
the control module 8 is a single chip microcomputer, and the control module 5 receives nitrogen pressure data detected by the pressure sensor 7 in real time and controls the opening and closing of the electromagnetic valve 5. The power supply 9 is a storage battery and supplies electric energy to the control module 8, the pressure sensor 7 and the electromagnetic valve 5. When in use, the device is arranged between the pressure reducing valve and the transformer. The air inlet interface 2 is connected with the pressure reducing valve through an air pipe, and the air outlet interface 3 is connected with the transformer through an air pipe. When a worker fills nitrogen into the transformer, the electromagnetic valve 5 is in an open state; the nitrogen flows out of the pressure reducing valve, flows into the connecting pipe 6 through the air inlet connector 2, flows out of the connecting pipe 6 through the air outlet connector 3, and is finally filled into the transformer.
When the staff uses the main transformer to annotate nitrogen pressurization monitoring devices and detects the sealing condition of transformer, including the following steps:
1) An air inlet interface 2 on the side surface of a box body 1 is connected with a pressure reducing valve, and an air outlet interface 3 is connected with a transformer; then, setting a nitrogen pressure inflation value and a nitrogen pressure leakage value through a control module 8;
2) Opening the pressure reducing valve, opening the electromagnetic valve 5, and filling nitrogen into the transformer; when the pressure sensor 7 detects that the pressure of the nitrogen in the transformer reaches the nitrogen pressure inflation value, the electromagnetic valve 5 is closed; the pressure sensor 7 continues to detect the nitrogen pressure in the transformer; if the pressure sensor 7 detects that the pressure of the nitrogen inside the transformer is basically unchanged, the transformer is well sealed; if the pressure sensor 7 detects that the pressure of the nitrogen inside the transformer is reduced along with the time, the transformer leaks;
3) When the transformer leaks, the pressure sensor 7 continues to detect the nitrogen pressure in the transformer; when the nitrogen pressure in the transformer is reduced to the nitrogen pressure leakage value, the electromagnetic valve 5 is opened, the transformer is continuously filled with nitrogen to the nitrogen pressure filling value, and the time for reducing the nitrogen pressure in the transformer from the nitrogen pressure filling value to the nitrogen pressure leakage value is recorded.
The leakage condition of the transformer can be judged according to the time for reducing the nitrogen pressure in the transformer from the nitrogen pressure inflation value to the nitrogen pressure leakage value; the shorter the time for the nitrogen pressure inside the transformer to decrease from the nitrogen pressure charging value to the nitrogen pressure leakage value, the more serious the leakage of the transformer.
Example 2:
this embodiment differs from embodiment 1 in that: the front surface of the box body 1 is provided with a display module 11 and a switch 4; the display module 11 and the switch 4 are respectively connected with the control module 8 through wires. The switch 4 is used for controlling the on-off of the device; display module 11 be the touch-control screen, the staff can set for the pressure value of aerifing of transformer end and look over the inside nitrogen gas pressure value of transformer through display module 11 control solenoid valve 5.
The working principle of this embodiment is the same as that of embodiment 1.
Example 3:
this embodiment differs from embodiment 2 in that: the pressure sensor 7 is arranged on one side of the connecting pipe 6 close to the air outlet connector 3; the electromagnetic valve 5 is arranged on one side of the connecting pipe 6 close to the air inlet interface 2. Pressure sensor 7 install in the one side that connecting pipe 6 is close to interface 3 of giving vent to anger, solenoid valve 5 is installed in the one side that connecting pipe 6 is close to interface 2 of admitting air, when solenoid valve 5 closed, pressure sensor 7 measuring is the inside nitrogen pressure value of transformer to guarantee measured data's accuracy.
The working principle of this embodiment is the same as that of embodiment 1.
Example 4:
this embodiment differs from embodiment 3 in that: the back of the box body 1 is provided with a hook 10. The hook 10 arranged on the back of the box body 1 facilitates the user to take the box body 1 and hang the box body 1 on a rope, so that the device is more convenient to use.
The working principle of this embodiment is the same as that of embodiment 1.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made thereto by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should be considered as falling within the scope of the present invention.
Claims (5)
1. The utility model provides a main nitrogen injection pressurization monitoring devices which characterized in that: the device comprises a box body (1), an air inlet interface (2), an air outlet interface (3), an electromagnetic valve (5), a connecting pipe (6), a pressure sensor (7), a control module (8) and a power supply (9);
an air inlet connector (2) and an air outlet connector (3) are arranged on the right side of the box body (1); the connecting pipe (6) is arranged in the box body (1), one end of the connecting pipe is connected with the air inlet connector (2), and the other end of the connecting pipe is connected with the air outlet connector (3); the body of the connecting pipe (6) is provided with an electromagnetic valve (5) and a pressure sensor (7); a control module (8) is installed on the top surface inside the box body (1), and a power supply (9) is installed on the side surface inside the box body (1); the electromagnetic valve (5) and the pressure sensor (7) are respectively connected with the control module (8) through leads.
2. The main transformer nitrogen injection pressurization monitoring device of claim 1, characterized in that: the front surface of the box body (1) is provided with a display module (11) and a switch (4); the display module (11) and the switch (4) are respectively connected with the control module (8) through leads.
3. The main transformer nitrogen injection pressurization monitoring device of claim 1, characterized in that: the pressure sensor (7) is arranged on one side of the connecting pipe (6) close to the air outlet connector (3); the electromagnetic valve (5) is arranged on one side of the connecting pipe (6) close to the air inlet interface (2).
4. The main transformer nitrogen injection pressurization monitoring device of claim 1, characterized in that: the back of the box body (1) is provided with a hook (10).
5. The use method of the main transformer nitrogen injection pressurization monitoring device is characterized in that: the method specifically comprises the following steps: the method is characterized in that:
1) connecting an air inlet interface (2) on the side surface of a box body (1) with a pressure reducing valve, and connecting an air outlet interface (3) with a transformer; then setting a nitrogen pressure inflation value and a nitrogen pressure leakage value through a control module (8);
2) Opening the pressure reducing valve, opening the electromagnetic valve (5), and filling nitrogen into the transformer; when the pressure sensor (7) detects that the pressure of the nitrogen inside the transformer reaches a nitrogen pressure inflation value, the electromagnetic valve (5) is closed; the pressure sensor (7) continues to detect the nitrogen pressure in the transformer; if the pressure sensor (7) detects that the pressure of the nitrogen inside the transformer is basically unchanged, the transformer is well sealed; if the pressure sensor (7) detects that the pressure of the nitrogen inside the transformer is reduced along with the time, the transformer leaks;
3) When the transformer leaks, the pressure sensor (7) continues to detect the nitrogen pressure in the transformer; when the nitrogen pressure in the transformer is reduced to the nitrogen pressure leakage value, the electromagnetic valve (5) is opened, the transformer is continuously filled with nitrogen to the nitrogen pressure filling value, and the time for reducing the nitrogen pressure in the transformer from the nitrogen pressure filling value to the nitrogen pressure leakage value is recorded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211123863.9A CN115493778A (en) | 2022-09-15 | 2022-09-15 | Main transformer nitrogen injection pressurization monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211123863.9A CN115493778A (en) | 2022-09-15 | 2022-09-15 | Main transformer nitrogen injection pressurization monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115493778A true CN115493778A (en) | 2022-12-20 |
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ID=84469065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211123863.9A Pending CN115493778A (en) | 2022-09-15 | 2022-09-15 | Main transformer nitrogen injection pressurization monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115493778A (en) |
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2022
- 2022-09-15 CN CN202211123863.9A patent/CN115493778A/en active Pending
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