CN201810354U - Automatic pressure regulator for main tube of steam supply for shaft seal - Google Patents
Automatic pressure regulator for main tube of steam supply for shaft seal Download PDFInfo
- Publication number
- CN201810354U CN201810354U CN2010205600201U CN201020560020U CN201810354U CN 201810354 U CN201810354 U CN 201810354U CN 2010205600201 U CN2010205600201 U CN 2010205600201U CN 201020560020 U CN201020560020 U CN 201020560020U CN 201810354 U CN201810354 U CN 201810354U
- Authority
- CN
- China
- Prior art keywords
- pressure
- shaft seal
- steam
- tube
- steam supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model relates to an automatic pressure regulator, in particular to an automatic pressure regulator for a main tube of steam supply for a shaft seal, which comprises a pressure equalizing tank which is communicated with a pressure cylinder. The automatic pressure regulator is characterized in that both ends of a steam tube of steam supply for the shaft seal on the outlet of the pressure equalizing tank are communicated with an air tube; pistons are arranged at two connectors of the air tube and the steam tube of steam supply for the shaft seal, and the air tube is provided with an air pump and a pressure transmitter. The utility model can effectively reduce the inleakage of air, improve vacuum and reduce the leakage of steam so as to stabilize the pressure of the main tube of steam supply for the shaft seal and improve the economical efficiency of power plant.
Description
(1) technical field
The utility model relates to a kind of pressure automatic adjusting device, particularly a kind of shaft seal steam main-piping pressure automatic control regulator.
(2) background technique
Modern generator set substantially all adopts surge tank steam regulation pressure about 0.101～0.113MPa, and this pressure is a little more than atmospheric pressure.Pressure is that inconvenience is kept, and its objective is to make shaft seal steam pressure a little more than atmospheric pressure, can make air be unlikely to bleed in the steam turbine system because surge tank pressure changes along with the variation of load in certain scope.
Unit is in operation, enter the steam turbine workshop in order to guarantee that steam leaks outside without axle, often axle is sealed the vapour main-piping pressure and transfer to low spot, make air have a little to bleed, this will make vacuum tightness reduce greatly, increased the burden of vacuum pump, the operations staff has also increased the randomness of unit operation to the adjustment of axial seal pressure, and is unfavorable to economical operation.
(3) summary of the invention
The utility model provides the shaft seal steam main-piping pressure that a kind of power consumption is low, leakproofness is high automatic control regulator in order to remedy the deficiencies in the prior art.
The utility model is achieved by the following technical solution:
A kind of shaft seal steam main-piping pressure automatic control regulator, comprise the surge tank that is communicated with the pressure cylinder, it is characterized in that: the shaft seal steam steam tube two ends in the described surge tank outlet are communicated with an air duct, two jointings of air duct and shaft seal steam steam tube are provided with piston, and gas-filled pump and pressure transmitter are installed on the air duct.
Key problem in technology of the present utility model is, vapor pressure after the surge tank adjusting is linked to each other with an air duct by piston, by female pipe of piston coupling shaft gland sealing steam supply and ambient atmosphere, can be according to atmospheric pressure, adjust the pressure in female pipe in real time, keep that main-piping pressure equates with atmospheric pressure or a little more than barometric pressure, reduce that air bleeds and steam is outwards revealed.
The utility model is installed bleed valve on gas-filled pump, on the surge tank outlet conduit throttle valve is set, by the pressure in valve and the automatic adjusting axle gland sealing steam supply of the pressure pump steam tube.
The utility model can effectively reduce the amount of bleeding of air, improves vacuum, reduces the leakage of steam simultaneously, and then the pressure of the female pipe of stable axis gland sealing steam supply, improves the Economy of power plant.
(4) description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Accompanying drawing is a structural representation of the present utility model.
Among the figure, 1 high-pressure cylinder, 2 intermediate pressure cylinders, 3 low pressure (LP) cylinders, 4 high pressure front axles envelope vapour, 5 high pressure rear shaft seal vapour, press front axle envelope vapour in 6, press rear shaft seal vapour, 8 low pressure front axles envelope vapour in 7,9 low pressure rear shaft seal vapour, 10 surge tanks, 11 throttle valve, 12 pistons, 13 gas-filled pumps, 14 pressure transmitters, 15 shaft seal steam steam tubes, 16 air ducts, 17 bleed valves.
(5) embodiment
Accompanying drawing is a kind of specific embodiment of the present utility model.This embodiment comprises the surge tank 10 that is communicated with the pressure cylinder, shaft seal steam steam tube 15 two ends in described surge tank 10 outlets are communicated with an air duct 16, air duct 16 is provided with piston 12 with two jointings of shaft seal steam steam tube 15, and gas-filled pump 13 and pressure transmitter 14 are installed on the air duct 16; On the described gas-filled pump 13 bleed valve 17 is installed; Described surge tank 10 outlet conduits are provided with throttle valve 11.
In the selfsealings gland seal system, when steam turbine high-pressure cylinder 1 antero posterior axis envelope vapour 4,5 and intermediate pressure cylinder 2 antero posterior axis envelope vapour 6,7 behind surge tank 10 steam supplies, surge tank 10 is adjusted in pressure to 0.101～0.113MPa scope, and before installing the utility model additional, this pressure can change along with the change of load.After installing the utility model additional, keep the aperture of surge tank 10 speed control mufflers 11 constant, in feeding of low-pressure shaft seal steam tube 15, be higher than the air pressure of air duct 16 as vapor pressure, then piston 12 moves down, increase the steam side space, reduce air duct 16 pressure, be lower than air duct 16 inner air pressures as vapor pressure, then move on the piston 12, increase air duct 16 pressure, reduce the steam side space, keep vapor pressure identical with air side pressure all the time.
Air side pressure is lower than 0.101MPa, after gas-filled pump 13 is received the low-pressure signal that pressure transmitter 14 sends here, starts inflation, increases the pressure of air duct 16, as air duct 16 overpressure, then opens bleed valve 17 automatically, carries out pressure release.
Claims (3)
1. shaft seal steam main-piping pressure automatic control regulator, comprise the surge tank (10) that is communicated with the pressure cylinder, it is characterized in that: shaft seal steam steam tube (15) two ends in described surge tank (10) outlet are communicated with an air duct (16), air duct (16) is provided with piston (12) with two jointings of shaft seal steam steam tube (15), and gas-filled pump (13) and pressure transmitter (14) are installed on the air duct (16).
2. shaft seal steam main-piping pressure automatic control regulator according to claim 1 is characterized in that: bleed valve (17) is installed on the described gas-filled pump (16).
3. shaft seal steam main-piping pressure automatic control regulator according to claim 1 and 2 is characterized in that: described surge tank (10) outlet conduit is provided with throttle valve (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205600201U CN201810354U (en) | 2010-10-14 | 2010-10-14 | Automatic pressure regulator for main tube of steam supply for shaft seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205600201U CN201810354U (en) | 2010-10-14 | 2010-10-14 | Automatic pressure regulator for main tube of steam supply for shaft seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201810354U true CN201810354U (en) | 2011-04-27 |
Family
ID=43893297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205600201U Expired - Fee Related CN201810354U (en) | 2010-10-14 | 2010-10-14 | Automatic pressure regulator for main tube of steam supply for shaft seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201810354U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052103A (en) * | 2010-10-14 | 2011-05-11 | 山东电力高等专科学校 | Automatic pressure adjuster for main steam supply pipe with shaft seal |
-
2010
- 2010-10-14 CN CN2010205600201U patent/CN201810354U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052103A (en) * | 2010-10-14 | 2011-05-11 | 山东电力高等专科学校 | Automatic pressure adjuster for main steam supply pipe with shaft seal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201810354U (en) | Automatic pressure regulator for main tube of steam supply for shaft seal | |
| CN104329128A (en) | Back pressure machine work application device for supplying discharged steam of steam turbine high-pressure cylinder for industrial steam extracting system | |
| CN102052103A (en) | Automatic pressure adjuster for main steam supply pipe with shaft seal | |
| CN202598130U (en) | Self-gas-supplying system controlled by pressure adjusting device of compressed natural gas | |
| CN201982145U (en) | Shaft seal system of extraction condensing or condensing turbine | |
| CN108561190B (en) | Shaft seal system of steam turbine | |
| CN202188507U (en) | Pressure self-adaption multiple-air-source nozzle | |
| CN112127955A (en) | Cylinder structure with built-in steam seal pipeline and steam seal pressure regulator | |
| CN202081925U (en) | Electricity and heat cogeneration system of straight condensing steam turbine set | |
| CN201863471U (en) | Special cooling water tank for printer | |
| CN202047869U (en) | Steam turbine set steam sealing pressure equalizing box device | |
| CN203441638U (en) | Natural-gas engine gas-supply system | |
| CN207701185U (en) | Turbo-generator Set gland-packing leakage system | |
| CN208578589U (en) | A kind of steam turbine gland system of overflow heat recovery cascade utilization | |
| CN204478860U (en) | Plant condenser three grades of Roots's variable frequency pump group energy efficiency vacuum maintain system | |
| CN202125727U (en) | Air temperature heat exchange type decompression device for compressed natural gas | |
| CN204200287U (en) | For the back pressure machine acting device of steam turbine high-pressure cylinder steam discharge for extraction steam for factories system | |
| CN201826902U (en) | Vacuum sealing system of steam turbine | |
| CN102230576A (en) | Air-temperature heat exchange type compressed natural gas pressure-relief device | |
| CN214741485U (en) | Steam sealing system of back pressure steam turbine | |
| CN103861696A (en) | Gas feeding system of ball mill | |
| CN202090963U (en) | Turbine negative difference expansion control device | |
| CN202012738U (en) | Multi-air-source inflow integrated compression device | |
| CN202381896U (en) | Isobaric ventilation block for CNG filling station | |
| CN216240960U (en) | Gas supply transmission valve for PG9171E type gas turbine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110427 Termination date: 20131014 |