CN208934747U - A kind of feed pump turbine switching valve it is anti-without instruction valve from opening apparatus - Google Patents
A kind of feed pump turbine switching valve it is anti-without instruction valve from opening apparatus Download PDFInfo
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- CN208934747U CN208934747U CN201821695517.7U CN201821695517U CN208934747U CN 208934747 U CN208934747 U CN 208934747U CN 201821695517 U CN201821695517 U CN 201821695517U CN 208934747 U CN208934747 U CN 208934747U
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- servo valve
- valve
- seal boss
- feed pump
- switching valve
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Abstract
The utility model relates to a kind of feed pump turbine switching valve it is anti-without instruction valve from opening apparatus, including electrohydraulic servo valve closure plate, electrohydraulic servo valve closure plate is equipped with multiple mounting grooves corresponding with servo valve oil pipe, plugging mechanism is equipped in mounting groove, the plugging mechanism includes that the seal boss being fixedly connected in mounting groove with electrohydraulic servo valve closure plate is arranged in, the end of seal boss connects support column, the end of support column is installed by annular plugging plate, the outside that the bottom of mounting groove is located at seal boss is equipped with the first sealing ring, fixes the second sealing ring on the circumferential surface of seal boss.By removing the electrohydraulic servo valve on feed pump turbine switching valve oil motor, in the electrohydraulic servo valve closure plate of the former servo valve position installation present apparatus, completely eliminate the defect that small machine switching valve is opened certainly without instruction, and it is swung at switching valve oil motor and oil-piping is caused to vibrate, the significant deficiency of joint looseness oil leak ensure that the safe operation of unit.
Description
Technical field
The utility model relates to power domain, especially a kind of feed pump turbine switching valve is anti-to open dress without instruction valve certainly
It sets.
Background technique
The thermal energy that thermal power generation generates when being using solids, liquid, gas fuel combustions such as coal, petroleum, natural gases, passes through
Generation power device is converted into a kind of generation mode of electric energy.It is the main generation mode in China, automobile assembly welding Iine is as fire
One of steam turbine generator Important Auxiliary equipment equipment of power station, there are two vapour sources for feed pump turbine, and a work vapour source, one standby
Use vapour source.Between low pressure vapour source and high pressure standby steam source by the way of outer switching, four sections of steam extractions to small machine are into vapour by a master
Steam valve and five regulating valve controls；Cold section of steam of reheating is then controlled by a switching valve, and main vapour is subsequently entered after flow restriction control
Valve and regulating valve.When unit operates normally, feed pump turbine is by four sections of steam extraction steam supplies, when control valve opening is greater than 95%, into vapour
When amount still can not meet feed pump power requirement, switching valve is opened, and high parameter steam enters stop valve through switching valve.
The aperture that switching valve is controlled by switching valve oil motor is adapted steam flow and required power.Switching valve
It is arranged on cold section of steam extraction line of reheater.Since small machine is uneconomical using cold section of steam of reheating, most power plant have cancelled
Pipeline of the cold section of steam of reheating to small machine, my company uses close switching valve before electrically operated gate measure, do not use Gao Pin
The steam of matter drives small machine acting.
Switching valve is by an oil motor continuous control, using unilateral oil inlet.Outer switching valve oil motivation is furnished with electrohydraulic servo valve,
The control signal proportion for receiving 4~20mA controls outer switching valve valve position；Real-time valve position is converted to 4~20mA signal and is output to MEH,
It is used to indicate outer switching valve displacement.Under emergency situation, it is subjected to the instruction of interrupting system, quick closedown interdicts unit into vapour.
But if switching valve oil motor electrohydraulic servo valve by alternating signal interfere when, switching valve without instruction repeatedly from
Open and close are closed, and EH oil-piping is impacted, locknut joint looseness, and since EH oil pressure is up to 14MPa, switching can not individually be isolated
Valve oil motivation, causes a large amount of oil leaks, and EH oil level is low or EH low oil pressure will cause that unit chaser is non-to stop, and primary method is will to cut
Valve servo valve oil inlet isolation is changed, installation valve will cause systemic contamination on EH oil-piping, and expense and time are longer.
Utility model content
Purpose of the utility model is to solve defects of the existing technology, provide a kind of feed pump turbine switching
Valve it is anti-without instruction valve from opening apparatus.
To achieve the goals above, the technical solution adopted in the utility model is:
A kind of feed pump turbine switching valve it is anti-without instruction valve from opening apparatus, including electrohydraulic servo valve closure plate, it is electro-hydraulic to watch
Valve plug plate is taken equipped with multiple mounting grooves corresponding with servo valve oil pipe, mounting groove is interior to be equipped with plugging mechanism, the plugging mechanism
Including the seal boss being fixedly connected in mounting groove with electrohydraulic servo valve closure plate is arranged in, the end of seal boss connects support
Annular plugging plate is installed in column, the end of support column, and the outside that the bottom of mounting groove is located at seal boss is equipped with the first sealing ring, close
It seals on the circumferential surface of boss and fixes the second sealing ring, the end of the servo valve oil pipe is located in mounting groove, annular plugging plate, support
Column and seal boss are extend into servo valve oil pipe, and the port of servo valve oil pipe and first sealing ring are in close contact, the
The inner wall of two sealing rings and the servo valve oil pipe is in close contact.
A kind of above-mentioned feed pump turbine switching valve it is anti-without instruction valve from opening apparatus, the diameter of the annular plugging plate
Greater than the bore of servo valve oil pipe, the material of annular plugging plate is rubber or flexiplast.
A kind of above-mentioned feed pump turbine switching valve it is anti-without instruction valve from opening apparatus, the electrohydraulic servo valve closure plate
The quantity of mounting groove is multiple.
A kind of above-mentioned feed pump turbine switching valve it is anti-without instruction valve from opening apparatus, the electrohydraulic servo valve closure plate
Four corners are equipped with fixation hole.
A kind of above-mentioned feed pump turbine switching valve it is anti-without instruction valve from opening apparatus, the seal boss and support column
It is integrally formed.
A kind of above-mentioned feed pump turbine switching valve is anti-, and without valve is instructed, from opening apparatus, the section of the seal boss is in
It is trapezoidal.
The utility model has the following beneficial effects: the electrohydraulic servo valve closure plate of the device is equipped with multiple and servo valve oil pipe pair
The mounting groove answered, is equipped with plugging mechanism in mounting groove, and the plugging mechanism includes being arranged in mounting groove and electro-hydraulic servo valve plug
The seal boss that plate is fixedly connected, the end of seal boss connect support column, and annular plugging plate, installation are installed in the end of support column
The outside that the bottom of slot is located at seal boss is equipped with the first sealing ring, fixes the second sealing ring on the circumferential surface of seal boss, removes
Electrohydraulic servo valve on feed pump turbine switching valve oil motor, in the electro-hydraulic servo valve plug of the former servo valve position installation present apparatus
The end of servo valve oil pipe is extend into corresponding mounting groove by plate, at this point, the annular plugging plate of plugging mechanism, support column with
And seal boss is extend into servo valve oil pipe, since the diameter of annular plugging plate is greater than the bore of servo valve oil pipe, annular envelope
The material of closure plate is rubber or flexiplast, and annular plugging plate is squeezed into arc shape and is tightly fitted in the interior of servo valve oil pipe
On wall, while the port of servo valve oil pipe and first sealing ring are in close contact, the second sealing ring and the servo valve oil pipe
Inner wall be in close contact, by the first sealing ring and the second sealing ring to the port sealing of servo valve oil pipe, annular plugging plate is mentioned
The preceding hydraulic oil by servo valve oil pipe stops, and greatly reduces the hydraulic oil that the first sealing ring and the second sealing ring are subject to
Impact force ensure that plugging effect, completely eliminate at the small machine switching valve defect that oneself opens without instruction and switching valve oil motor
Swing causes oil-piping to vibrate, and the significant deficiency of joint looseness oil leak ensure that the safe operation of unit.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the schematic cross-section of the utility model；
Fig. 3 is the schematic diagram of closure servo valve oil pipe after the utility model installation；
Fig. 4 is the area the A enlarged drawing in Fig. 2；
Fig. 5 is the area the B enlarged drawing in Fig. 3.
Specific embodiment
As shown in Figures 1 to 5, a kind of feed pump turbine switching valve it is anti-without instruction valve from opening apparatus, including electro-hydraulic watch
Valve plug plate 1 is taken, electrohydraulic servo valve closure plate 1 is equipped with multiple mounting grooves 2 corresponding with servo valve oil pipe, is equipped with envelope in mounting groove 2
Stifled mechanism, the plugging mechanism includes that the seal boss 3 being fixedly connected in mounting groove 2 with electrohydraulic servo valve closure plate 1 is arranged in, close
The end for sealing boss 3 connects support column 4, and seal boss 3 and support column 4 are integrally formed, and the section of seal boss 3 is trapezoidal, branch
Annular plugging plate 5 is installed in the end of dagger 4, and the outside that the bottom of mounting groove 2 is located at seal boss 3 is equipped with the first sealing ring 6, close
It seals on the circumferential surface of boss 3 and fixes the second sealing ring 7, the end of servo valve oil pipe 8 is located in mounting groove 2, annular plugging plate 5, branch
Dagger 4 and seal boss 3 are extend into servo valve oil pipe 8, and the port of servo valve oil pipe 8 and the first sealing ring 6 are in close contact,
The inner wall of second sealing ring 7 and the servo valve oil pipe 8 is in close contact, wherein the diameter of annular plugging plate 5 is greater than servo valve oil
The bore of pipe 8, the material of annular plugging plate 5 are rubber or flexiplast.
In the utility model, the quantity of mounting groove 2 is multiple on electrohydraulic servo valve closure plate 1, the four of electrohydraulic servo valve closure plate 1
Fixation hole 9 is equipped at angle, fixation hole 9 can be fixed in feed pump turbine main body by bolt,
The electrohydraulic servo valve closure plate 1 of the device is equipped with multiple mounting grooves 2 corresponding with servo valve oil pipe, in mounting groove 2
Equipped with plugging mechanism, the plugging mechanism includes that the sealing being fixedly connected in mounting groove 2 with electrohydraulic servo valve closure plate 1 is arranged in is convex
Platform 3, the end of seal boss 3 connect support column 4, and seal boss 3 and support column 4 are integrally formed, and the section of seal boss 3 is in ladder
Annular plugging plate 5 is installed in shape, the end of support column 4, and the outside that the bottom of mounting groove 2 is located at seal boss 3 is equipped with the first sealing
6 are enclosed, the second sealing ring 7 is fixed on the circumferential surface of seal boss 3, removes the electro-hydraulic servo on feed pump turbine switching valve oil motor
The end of servo valve oil pipe 8 is extend into mounting groove 2 in the electrohydraulic servo valve closure plate of the former servo valve position installation present apparatus by valve
Interior, annular plugging plate 5, support column 4 and seal boss 3 are extend into servo valve oil pipe 8, due to the diameter of annular plugging plate 5
Greater than the bore of servo valve oil pipe 8, the material of annular plugging plate 5 is rubber or flexiplast, and annular plugging plate 5 is squeezed into arc
Shape is simultaneously tightly fitted on the inner wall of servo valve oil pipe 8, while the port of servo valve oil pipe 8 closely connects with the first sealing ring 6
The inner wall of touching, the second sealing ring 7 and the servo valve oil pipe 8 is in close contact, right by the first sealing ring 6 and the second sealing ring 7
Hydraulic oil in servo valve oil pipe 8 is stopped in advance, is substantially reduced by the port sealing of servo valve oil pipe 8, annular plugging plate 5
The hydraulic oil impact force that first sealing ring 6 and the second sealing ring 7 are subject to, ensure that plugging effect, completely eliminates small machine-cut
Change valve and swung without instruction from the defect opened and switching valve oil motor and oil-piping is caused to vibrate, joint looseness oil leak it is great
Defect ensure that the safe operation of unit.
Basic principles, main features, and advantages of the present invention has been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only the principles of the present invention, the utility model also has respectively on the premise of not departing from the spirit and scope of the utility model
Kind changes and improvements, these changes and improvements are both fallen in the range of claimed invention.The requires of the utility model
Protection scope defined by appended claims and its equivalent.
Claims (6)
1. a kind of feed pump turbine switching valve it is anti-without instruction valve from opening apparatus, including electrohydraulic servo valve closure plate, electro-hydraulic servo
Valve plug plate is equipped with multiple mounting grooves corresponding with servo valve oil pipe, is equipped with plugging mechanism in mounting groove, which is characterized in that described
Plugging mechanism includes that the seal boss being fixedly connected in mounting groove with electrohydraulic servo valve closure plate is arranged in, and the end of seal boss connects
Support column is connect, annular plugging plate is installed in the end of support column, and it is close that the outside that the bottom of mounting groove is located at seal boss is equipped with first
Seal fixes the second sealing ring on the circumferential surface of seal boss, and the end of the servo valve oil pipe is located in mounting groove, and annular blocks
Plate, support column and seal boss are extend into servo valve oil pipe, and the port of servo valve oil pipe and first sealing ring are close
The inner wall of contact, the second sealing ring and the servo valve oil pipe is in close contact.
2. a kind of feed pump turbine switching valve according to claim 1 is anti-, without valve is instructed, from opening apparatus, feature exists
In the diameter of the annular plugging plate is greater than the bore of servo valve oil pipe, and the material of annular plugging plate is rubber or flexiplast.
3. a kind of feed pump turbine switching valve according to claim 1 is anti-, without valve is instructed, from opening apparatus, feature exists
In the quantity of mounting groove is multiple on the electrohydraulic servo valve closure plate.
4. a kind of feed pump turbine switching valve according to claim 1 is anti-, without valve is instructed, from opening apparatus, feature exists
In the four corners of the electrohydraulic servo valve closure plate are equipped with fixation hole.
5. a kind of feed pump turbine switching valve according to claim 1 is anti-, without valve is instructed, from opening apparatus, feature exists
In the seal boss and support column are integrally formed.
6. a kind of feed pump turbine switching valve according to claim 1 is anti-, without valve is instructed, from opening apparatus, feature exists
In the section of the seal boss is trapezoidal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821695517.7U CN208934747U (en) | 2018-10-19 | 2018-10-19 | A kind of feed pump turbine switching valve it is anti-without instruction valve from opening apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821695517.7U CN208934747U (en) | 2018-10-19 | 2018-10-19 | A kind of feed pump turbine switching valve it is anti-without instruction valve from opening apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208934747U true CN208934747U (en) | 2019-06-04 |
Family
ID=66725132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821695517.7U Active CN208934747U (en) | 2018-10-19 | 2018-10-19 | A kind of feed pump turbine switching valve it is anti-without instruction valve from opening apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208934747U (en) |
-
2018
- 2018-10-19 CN CN201821695517.7U patent/CN208934747U/en active Active
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