CN215817848U - Automatic nitrogen-filling protection device for generator - Google Patents
Automatic nitrogen-filling protection device for generator Download PDFInfo
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- CN215817848U CN215817848U CN202122325818.9U CN202122325818U CN215817848U CN 215817848 U CN215817848 U CN 215817848U CN 202122325818 U CN202122325818 U CN 202122325818U CN 215817848 U CN215817848 U CN 215817848U
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Abstract
An automatic nitrogen-charging protection device of a generator comprises an end cover, a pressure-compensating valve, a gas collecting tank and a gas tank, wherein the end cover is arranged at the upper part of a stator of the generator; the end cover is a pressure-resistant semicircular cover, and a circular connecting flange is arranged at the lower end of the end cover; the utility model realizes the following beneficial effects in real time: the automatic nitrogen protection device that fills of generator is through setting up the pressure compensating valve on the end cover, and through introducing the side of nitrogen gas from pressure compensating valve side cap in with the generator stator, carries out the side pressure balance to the diaphragm in the pressure compensating valve, and the effectual concentration and the automatic replenishment when pressure that has guaranteed nitrogen gas in the gland lower part generator stator have guaranteed the later stage installation and the holistic performance of generator, have brought very big facility for power generating equipment's installation.
Description
Technical Field
The utility model relates to the field of power generation equipment, in particular to an automatic nitrogen charging protection device for a generator.
Background
In the construction process of a large-scale thermal power plant, a generator end cover is opened for generator installation work often for months after a generator stator is conveyed to a site to be in place, the generator stator needs to be protected by internal nitrogen filling for preventing the internal metal of the generator from being corroded or reduced in insulation due to water vapor before the generator end cover is installed for months, the generator stator is not sealed by a temporary end cover before the generator stator is installed, the tightness is not good, high-purity nitrogen needs to be frequently filled into the generator, the manual nitrogen filling is complicated, the nitrogen filling is easy to fail in time, the internal rust of the generator stator is caused, and the later installation and the integral performance of the generator are influenced; therefore, a device is needed to solve the problem that the corrosion of internal metal or the reduction of insulation is caused by untimely supplement of nitrogen after nitrogen escapes in the process of protecting the stator of the existing large generator by charging nitrogen.
SUMMERY OF THE UTILITY MODEL
The utility model provides an automatic nitrogen-charging protection device for a generator, which is used for solving the problem that metal inside the generator is rusted or insulation is reduced because nitrogen is not timely supplemented after escaping in the process of nitrogen-charging protection of a stator of the existing large generator.
An automatic nitrogen-charging protection device of a generator comprises an end cover, a pressure-compensating valve, a gas collecting tank and a gas tank, wherein the end cover is arranged at the upper part of a stator of the generator; the end cover is a pressure-resistant semicircular cover, a circular connecting flange is arranged at the lower end of the end cover, a bolt is arranged in a through hole of the connecting flange, the lower end of the bolt corresponds to and is connected with a threaded hole in the stator of the generator, an air inlet hole is arranged in the middle of the upper part of the end cover, and a vertical air inlet short pipe is arranged at the upper part of the air inlet hole; the right side of the air inlet hole is provided with a side pressure hole, the upper parts of the side pressure holes are provided with vertical side pressure short pipes, and the upper ends of the side pressure short pipes are provided with valves A.
The pressure compensating valve is a three-way balance valve and comprises a valve body, a diaphragm and a side cover, wherein the valve body is arranged at the upper part of the end cover, the diaphragm is arranged at the inner side of the valve body, and the side cover is arranged at the right side of the valve body; the valve body is of a pipeline three-way structure, the upper part of the valve body is provided with an air inlet, the lower side of the valve body is provided with an air outlet, and the air outlet is communicated with the upper end of an air inlet short pipe in the middle of the upper end of the end cover; a partition plate is arranged between the air inlet and the air outlet of the valve body, and a sealing hole with a spherical surface is arranged in the middle of the right side of the partition plate; the right side of valve body is provided with the side opening, evenly is provided with the screw hole around the side opening.
The diaphragm be the circular elastic sheet of putting immediately, set up around the diaphragm in the middle of the side opening of valve body, be provided with hemispherical chock plug in the middle of the left surface of diaphragm, the sphere of chock plug corresponds and contacts with the middle sealed hole face of the valve body side opening of pressure-compensating valve.
The side cap be the conical casing of horizontal setting, the left surface of side cap is opened, the left surface edge of side cap is provided with flange, flange's left surface and diaphragm right flank edge contact, flange's through-hole corresponds and passes through bolted connection with the last screw hole of the valve body right flank, is provided with the pipe screw hole in the middle of the right side of side cap, the pipe screw hole passes through the trachea and communicates with the valve A on the end cover.
The gas collection box be the cylindrical box that the level set up, the right side of gas collection box is provided with the gas outlet, the gas outlet right side is passed through trachea and the intercommunication of pressure compensating valve upper portion air inlet, tracheal middle part is provided with valve B and pipeline barometer, the left side of gas collection box is provided with the air inlet.
The gas pitcher be the nitrogen gas holding vessel, the upper end of gas pitcher sets up the nipple, there is valve C the upper end of nipple, the valve C upper end is provided with the relief pressure valve, the upper portion of relief pressure valve is passed through the trachea and is connected with the air inlet of gas collecting box, upper portion one side of gas pitcher is provided with a jar body manometer.
The utility model realizes the following beneficial effects in real time: the automatic nitrogen protection device that fills of generator is through setting up the pressure compensating valve on the end cover, and through introducing the side of nitrogen gas from pressure compensating valve side cap in with the generator stator, carries out the side pressure balance to the diaphragm in the pressure compensating valve, and the effectual concentration and the automatic replenishment when pressure that has guaranteed nitrogen gas in the gland lower part generator stator have guaranteed the later stage installation and the holistic performance of generator, have brought very big facility for power generating equipment's installation.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic diagram of the internal structure of the pressure compensating valve.
In the figure: 1. the gas collection tank comprises an end cover, 2, valves A and 3, a pressure supplementing valve, 4, valves B and 5, a gas collection tank, 6, a pressure reducing valve, 7, valves C and 8, a tank pressure gauge, 9, a gas tank, 10, a pipeline pressure gauge, 11, a generator stator, 3-1, a valve body, 3-2, a side cover, 3-3, a diaphragm, 3-4 and a plug head.
Detailed Description
The utility model is further described with reference to the accompanying drawings and the detailed description below: as shown in fig. 1 and 2, the automatic generator nitrogen-charging protection device comprises an end cover 1, a pressure compensating valve 3, a gas collecting tank 5 and a gas tank 9, wherein the end cover 1 is arranged on the upper part of a generator stator 11, the end cover 1 is a pressure-resistant semicircular cover, a circular connecting flange is arranged at the lower end of the end cover 1, a bolt is arranged in a through hole of the connecting flange, the lower end of the bolt is correspondingly connected with a threaded hole on the stator of a generator, a gas inlet hole is arranged in the middle of the upper part of the end cover 1, and a vertical gas inlet short pipe is arranged at the upper part of the gas inlet hole; a lateral pressure hole is arranged on the right side of the air inlet hole, vertical lateral pressure short pipes are arranged on the upper parts of the lateral pressure holes, and a valve A2 is arranged at the upper end of each lateral pressure short pipe;
the pressure compensating valve 3 is a three-way balance valve, the pressure compensating valve 3 is composed of a valve body 3-1, a diaphragm 3-3 and a side cover 3-2, the valve body 3-1 is arranged at the upper part of the end cover 1, the valve body 3-1 is of a pipeline three-way structure, the upper part of the valve body 3-1 is an air inlet, the lower side of the valve body 3-1 is an air outlet, and the air outlet is communicated with the upper end of an air inlet short pipe in the middle of the upper end of the end cover 1; a partition plate is arranged between the air inlet and the air outlet of the valve body 3-1, and a sealing hole with a spherical surface is arranged in the middle of the right side of the partition plate; a side hole is formed in the right side of the valve body 3-1, and threaded holes are uniformly formed in the periphery of the side hole; the diaphragm 3-3 is arranged on the inner side of the valve body 3-1, the diaphragm 3-3 is a vertically arranged round elastic sheet, the periphery of the diaphragm 3-3 is arranged in the middle of a side hole of the valve body 3-1, a hemispherical plug 3-4 is arranged in the middle of the left side surface of the diaphragm 3-3, and the spherical surface of the plug 3-4 corresponds to and contacts with a sealing hole surface in the middle of the side hole of the valve body 3-1 of the pressure compensating valve 3; the side cover 3-2 is arranged on the right side of the valve body 3-1, the side cover 3-2 is a conical shell which is transversely arranged, the left side face of the side cover 3-2 is open, the edge of the left side face of the side cover 3-2 is provided with a connecting flange, the left side face of the connecting flange is contacted with the edge of the right side face of the diaphragm 3-3, a through hole of the connecting flange corresponds to a threaded hole in the right side face of the valve body 3-1 and is connected with the threaded hole through a bolt, the middle of the right side of the side cover 3-2 is provided with a pipe threaded hole, and the pipe threaded hole is communicated with a valve A2 on the end cover 1 through an air pipe;
the gas collection box 5 is arranged at the upper part of the pressure compensating valve 3, the gas collection box 5 is a horizontally arranged cylindrical box body, the right side of the gas collection box 5 is provided with a gas outlet, the right side of the gas outlet is communicated with a gas inlet at the upper part of the pressure compensating valve 3 through a gas pipe, the middle part of the gas pipe is provided with a valve B4 and a pipeline barometer 10, and the left side of the gas collection box 5 is provided with a gas inlet; the gas pitcher 9 set up in the left side of gas collecting box 5, gas pitcher 9 is the nitrogen gas holding vessel, the upper end of gas pitcher 9 sets up the nipple, there is valve C7 in the upper end of nipple, valve C7 upper end is provided with relief pressure valve 6, the upper portion of relief pressure valve 6 is passed through the trachea and is connected with the air inlet of gas collecting box 5, upper portion one side of gas pitcher 9 is provided with a jar body manometer 8.
When the automatic nitrogen-charging protection device of the generator is used, firstly, a valve C7 and a valve B4 on the upper part of a gas tank 9 are opened, meanwhile, a valve A2 is closed, nitrogen in the gas tank 9 enters a gas collecting tank 5 through a valve C7 and a pressure reducing valve 6, enters a pressure supplementing valve 3 through a valve B4 after reaching a certain pressure in the gas collecting tank 5, flows out of the lower part of a valve body 3-1 of the pressure supplementing valve 3, enters a generator stator 11 through a gas inlet short pipe on the upper part of an end cover 1 to flush nitrogen in the generator stator 11, after observing that a pipeline barometer 10 on the lower part of the gas collecting tank 5 reaches a designed air pressure, a valve A2 on a pressure supplementing short pipe on the upper side of the pressure cover is opened, at the moment, the nitrogen entering a cavity of the generator stator 11 enters a side hole of the pressure supplementing valve 3 through the side pressure short pipe and a valve A2 to push a membrane 3-3 to the left side, a plug 3-4 is pressed to the sealing hole of the valve body 3-1 of the pressure supplementing valve 3 to the left side, closing the nitrogen entering the pressure compensating valve 3 from the gas collecting tank 5, and stopping filling the generator stator 11 with the nitrogen; when the pressure in the cavity of the generator stator 11 is reduced, the pressure on the right side of the diaphragm 3-3 in the pressure compensating valve 3 is reduced, the nitrogen in the gas collection cavity pushes the plug head 3-4 on the left side of the diaphragm 3-3 away to supplement the nitrogen in the generator stator 11 on the lower portion of the gland until the pressure reaches the design, the plug head 3-4 of the diaphragm 3-3 seals the sealing hole of the pressure compensating valve 3 leftwards, the nitrogen addition is stopped, and the process of supplementing the nitrogen in the generator stator 11 is completed.
The present invention is not described in detail in the prior art.
Claims (6)
1. The utility model provides an automatic protection device that fills nitrogen of generator, includes end cover (1), pressure compensating valve (3), gas collection box (5) and gas pitcher (9), characterized by: the end cover (1) is arranged on the upper portion of a generator stator (11), the pressure compensating valve (3) is arranged on the upper portion of the end cover (1), the gas collecting box (5) is arranged on the upper portion of the pressure compensating valve (3), and the gas tank (9) is arranged on the left side of the gas collecting box (5); the end cover (1) is a pressure-resistant semicircular cover, a circular connecting flange is arranged at the lower end of the end cover (1), a bolt is arranged in a through hole of the connecting flange, the lower end of the bolt is correspondingly connected with a threaded hole in the stator of the generator, an air inlet hole is arranged in the middle of the upper part of the end cover (1), and a vertical air inlet short pipe is arranged at the upper part of the air inlet hole; the right side of the air inlet hole is provided with a side pressure hole, the upper parts of the side pressure holes are provided with vertical side pressure short pipes, and the upper ends of the side pressure short pipes are provided with valves A (2).
2. The automatic generator nitrogen-charging protection device as claimed in claim 1, wherein: the pressure compensating valve (3) is a three-way balance valve, the pressure compensating valve (3) is composed of a valve body (3-1), a diaphragm (3-3) and a side cover (3-2), the valve body (3-1) is arranged at the upper part of the end cover (1), the diaphragm (3-3) is arranged at the inner side of the valve body (3-1), and the side cover (3-2) is arranged at the right side of the valve body (3-1); the valve body (3-1) is of a pipeline three-way structure, the upper part of the valve body (3-1) is provided with an air inlet, the lower side of the valve body (3-1) is provided with an air outlet, and the air outlet is communicated with the upper end of an air inlet short pipe in the middle of the upper end of the end cover (1); a partition plate is arranged between the air inlet and the air outlet of the valve body (3-1), and a sealing hole with a spherical surface is arranged in the middle of the right side of the partition plate; a side hole is arranged on the right side of the valve body (3-1), and threaded holes are uniformly formed around the side hole.
3. The automatic nitrogen-charging protection device for the generator as claimed in claim 2, wherein: the diaphragm (3-3) is a vertically arranged circular elastic sheet, the periphery of the diaphragm (3-3) is arranged in the middle of a side hole of the valve body (3-1), the middle of the left side surface of the diaphragm (3-3) is provided with a hemispherical plug head (3-4), and the spherical surface of the plug head (3-4) corresponds to and contacts with a sealing hole surface in the middle of the side hole of the valve body (3-1) of the pressure compensating valve (3).
4. The automatic nitrogen-charging protection device for the generator as claimed in claim 2, wherein: the side cover (3-2) is a conical shell which is transversely arranged, the left side face of the side cover (3-2) is open, a connecting flange is arranged on the edge of the left side face of the side cover (3-2), the left side face of the connecting flange is in edge contact with the edge of the right side face of the diaphragm (3-3), a through hole of the connecting flange corresponds to a threaded hole in the right side face of the valve body (3-1) and is connected with the threaded hole through a bolt, a pipe threaded hole is formed in the middle of the right side of the side cover (3-2), and the pipe threaded hole is communicated with a valve A (2) in the end cover (1) through a gas pipe.
5. The automatic generator nitrogen-charging protection device as claimed in claim 1, wherein: gas collection case (5) be the cylindrical box that the level set up, the right side of gas collection case (5) is provided with the gas outlet, the gas outlet right side is passed through trachea and the intercommunication of pressure compensating valve (3) upper portion air inlet, tracheal middle part is provided with valve B (4) and pipeline barometer (10), the left side of gas collection case (5) is provided with the air inlet.
6. The automatic generator nitrogen-charging protection device as claimed in claim 1, wherein: the gas pitcher (9) be the nitrogen gas holding vessel, the upper end of gas pitcher (9) sets up the nipple, there is valve C (7) upper end of nipple, valve C (7) upper end is provided with relief pressure valve (6), the upper portion of relief pressure valve (6) is passed through the trachea and is connected with the air inlet of gas collecting tank (5), upper portion one side of gas pitcher (9) is provided with a jar body manometer (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122325818.9U CN215817848U (en) | 2021-09-26 | 2021-09-26 | Automatic nitrogen-filling protection device for generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122325818.9U CN215817848U (en) | 2021-09-26 | 2021-09-26 | Automatic nitrogen-filling protection device for generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215817848U true CN215817848U (en) | 2022-02-11 |
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ID=80166287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122325818.9U Active CN215817848U (en) | 2021-09-26 | 2021-09-26 | Automatic nitrogen-filling protection device for generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215817848U (en) |
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2021
- 2021-09-26 CN CN202122325818.9U patent/CN215817848U/en active Active
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