CN204805569U - Power plant high -low pressure bypass subtracts steam converter valve - Google Patents
Power plant high -low pressure bypass subtracts steam converter valve Download PDFInfo
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- CN204805569U CN204805569U CN201520485576.1U CN201520485576U CN204805569U CN 204805569 U CN204805569 U CN 204805569U CN 201520485576 U CN201520485576 U CN 201520485576U CN 204805569 U CN204805569 U CN 204805569U
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- valve
- converter valve
- steam converter
- low pressure
- pressure bypass
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Abstract
The utility model relates to a power plant high -low pressure bypass subtracts steam converter valve belongs to the valve and makes technical field, and the back mounted of cylinder head has the pneumatic cylinder, and the fixed axle is installed to the output of pneumatic cylinder, installs the locator on the lateral wall of cylinder head, the baffle is installed in the front of cylinder head, is provided with the diaphragm orifice on the baffle, and the rear end of baffle is provided with the case, is provided with sealed face on the case wall adjacent with the baffle, installs the protective sheath corresponding with the diaphragm orifice on the sealed face, the cover is equipped with the graphite balance ring on the valve line of valve. Adopt high -low pressure bypass subtracting steam converter valve to install the scour protection additional and rinse the device, avoided the unit to start the blow damage of initial stage moist steam to the valve seal face effectively, the high -low pressure bypass subtracts the former pneumatic actuator of steam converter valve and changes gas -liquid linkage force amplifier into, has increased actuating mechanism moment. The problem of the high -low pressure bypass subtract and leak in the steam converter valve is solved, effectively reduce the meaningless loss that the high -low pressure bypass subtracts the steam converter valve, for reduce the coal consumption, energy saving and emission reduction works well.
Description
Technical field
The utility model belongs to technical field of valve manufacturing, particularly relates to a kind of power station hp and lp bypass steam converter valve.
Background technique
At present, leak phenomenon ubiquity in the hp and lp bypass steam converter valve of thermal power plant, had a strong impact on the thermal efficiency of unit.During valve opening state, spool there is water vapour wash away, open in machine process at unit, there is a large amount of wet vapor to be flushed on spool, because vapor (steam) velocity is very fast, reach more than 100m/s, when the entrainment portions globule, spool is washed away very large, often start shooting once just by valve erosion failure.Before valve closing, due to the effect of water erosion, result in the interior leakage of hp and lp bypass steam converter valve.The part superheated vapor that the boiler that should enter steam turbine acting is come could not participate in the acting of steam turbine high-pressure cylinder, and the efficiency of steam turbine is decreased, and coal consumption becomes large to some extent.Actuator is pneumatic hp and lp bypass steam converter valve, and valve closing power is little, and the specific pressure of valve sealing face is relatively little, is not easy to ensure that valve is tight.
Model utility content
The utility model provides the power station hp and lp bypass steam converter valve that a kind of structure is simple, easy to install, increase work efficiency for solving in known technology the technical problem that exists.
The technological scheme that the utility model is taked for the technical problem existed in solution known technology is:
This power station hp and lp bypass steam converter valve comprises: cylinder head, stationary axle, oil hydraulic cylinder, graphite balance ring, positioning work piece, spool, sealing surface, protecting jacket, plate hole;
The back side of cylinder head is provided with oil hydraulic cylinder, and the output terminal of oil hydraulic cylinder is provided with stationary axle, and the sidewall of cylinder head is provided with positioning work piece; The front of cylinder head is provided with dividing plate, and dividing plate is provided with plate hole, and the rear end of dividing plate is provided with spool, the spool wall adjacent with dividing plate is provided with sealing surface, sealing surface is provided with the protecting jacket corresponding with plate hole; The valve line of valve is set with graphite balance ring.
The utility model can also adopt following technical measures:
The ft connection of described oil hydraulic cylinder adopts pressurized air as the hydraulic proportional pump of power.
Described graphite balance ring is in series with and opens formula pilot valve in advance.
Adopt and open formula pilot valve in advance and connect with graphite balance ring and carry out balance valve core work; can ensure that open force is little; ensure sealing effect again; leakage when preventing graphite balance ring from wearing and tearing; the valve line of thorough protection valve, makes the potted line of valve within protecting jacket, and it is on the protective sleeve that the high speed of wet vapor is washed away; such valve sealing face is unaffected, and protecting jacket damages to some extent also can not affect sealing effect.In order to improve the thrust of actuator, original actuator basis is transformed, cylinder head perforate is produced the stationary axle stretched out, cylinder head installs oil hydraulic cylinder additional, the ft connection of oil hydraulic cylinder adopts pressurized air as the hydraulic proportional pump of power, thrust is increased by oil hydraulic cylinder when valve-closed state, ensure sealing, during valve opening, by positioning work piece draw in addition the off-load of pressurized air hydraulic control cylinder, valve recovers pneumatic control, and technical ability controls reliably, can ensure again the necessary pressure of sealing surface.On pneumatic actuator, install oil hydraulic cylinder additional, adjustment at ordinary times adopts cylinder, adopts oil hydraulic cylinder afterburning, ensure closing forces during valve closing, and the source pressure of oil hydraulic cylinder adopts gas-liquid booster pump, simple and reliable for structure, and hydraulic oil adopts flame retardant oil.All control can not increase thermal technology's wiring, therefore transforms difficulty low, effective.
The advantage that the utility model has and good effect are: this power station hp and lp bypass steam converter valve employing hp and lp bypass steam converter valve installs additional to be prevented washing away device, efficiently avoid unit starting initial stage wet vapor to the blow loss of valve sealing face; The former pneumatic actuator of hp and lp bypass steam converter valve changes gas-liquid linked boosting mechanism into, increases actuator's moment.Solve the problem of leaking in hp and lp bypass steam converter valve, effectively reduce the meaningless loss of hp and lp bypass steam converter valve, for reduction coal consumption, energy-saving and emission-reduction are worked well.
Accompanying drawing explanation
Fig. 1 is the structural representation of the power station hp and lp bypass steam converter valve that the utility model embodiment provides;
Fig. 2 is the structural representation in the hp and lp bypass steam converter valve A portion, power station that the utility model embodiment provides;
In figure: 1, cylinder head; 2, stationary axle; 3, oil hydraulic cylinder; 4, graphite balance ring; 5, positioning work piece; 6, spool; 7, sealing surface; 8, protecting jacket; 9, plate hole.
Embodiment
For summary of the invention of the present utility model, Characteristic can be understood further, hereby exemplify following examples, and coordinating accompanying drawing to be described in detail as follows: the module used by the utility model or unit all belong to known module or unit, when buying module or unit, are provided with software.There is not the innovation of software or method in the utility model.
Refer to shown in Fig. 1 to Fig. 2: this power station hp and lp bypass steam converter valve comprises: cylinder head 1, stationary axle 2, oil hydraulic cylinder 3, graphite balance ring 4, positioning work piece 5, spool 6, sealing surface 7, protecting jacket 8, plate hole 9;
The back side of cylinder head 1 is provided with oil hydraulic cylinder 3, and the output terminal of oil hydraulic cylinder 3 is provided with stationary axle 2, the sidewall of cylinder head 1 is provided with positioning work piece 5; The front of cylinder head 1 is provided with dividing plate, dividing plate is provided with plate hole 9, and the rear end of dividing plate is provided with spool 6, spool 6 wall adjacent with dividing plate is provided with sealing surface 7, sealing surface 7 is provided with the protecting jacket 8 corresponding with plate hole 9; The valve line of valve is set with graphite balance ring 4.
The utility model can also adopt following technical measures:
The ft connection of described oil hydraulic cylinder 3 adopts pressurized air as the hydraulic proportional pump of power.
Described graphite balance ring 4 is in series with and opens formula pilot valve in advance.
Adopt and open formula pilot valve in advance and connect with graphite balance ring 4 and carry out balance valve core 6 and work; can ensure that open force is little; ensure sealing effect again; leakage when preventing graphite balance ring 4 from wearing and tearing; the valve line of thorough protection valve, makes the potted line of valve within protecting jacket 8, and it is on protecting jacket 8 that the high speed of wet vapor is washed away; such valve sealing face 7 is unaffected, and protecting jacket 8 damages to some extent also can not affect sealing effect.In order to improve the thrust of actuator, original actuator basis is transformed, cylinder head 1 perforate is produced the stationary axle 2 stretched out, cylinder head 1 installs additional oil hydraulic cylinder 3, the ft connection of oil hydraulic cylinder 3 adopts pressurized air as the hydraulic proportional pump of power, thrust is increased by oil hydraulic cylinder 3 when valve-closed state, ensure sealing, during valve opening, by positioning work piece 5 draw in addition the off-load of pressurized air hydraulic control cylinder 3, valve recovers pneumatic control, and technical ability controls reliably, can ensure again the necessary pressure of sealing surface 7.On pneumatic actuator, install oil hydraulic cylinder 3 additional, adjustment at ordinary times adopts cylinder, adopts oil hydraulic cylinder 3 afterburning, ensure closing forces during valve closing, and the source pressure of oil hydraulic cylinder 3 adopts gas-liquid booster pump, simple and reliable for structure, and hydraulic oil adopts flame retardant oil.All control can not increase thermal technology's wiring, therefore transforms difficulty low, effective.
The above is only to preferred embodiment of the present utility model, not any pro forma restriction is done to the utility model, every according to technical spirit of the present utility model to any simple modification made for any of the above embodiments, equivalent variations and modification, all belong in the scope of technical solutions of the utility model.
Claims (3)
1. a power station hp and lp bypass steam converter valve, is characterized in that, this power station hp and lp bypass steam converter valve comprises: cylinder head, stationary axle, oil hydraulic cylinder, graphite balance ring, positioning work piece, spool, sealing surface, protecting jacket, plate hole;
The back side of cylinder head is provided with oil hydraulic cylinder, and the output terminal of oil hydraulic cylinder is provided with stationary axle, and the sidewall of cylinder head is provided with positioning work piece; The front of cylinder head is provided with dividing plate, and dividing plate is provided with plate hole, and the rear end of dividing plate is provided with spool, the spool wall adjacent with dividing plate is provided with sealing surface, sealing surface is provided with the protecting jacket corresponding with plate hole; The valve line of valve is set with graphite balance ring.
2. power station as claimed in claim 1 hp and lp bypass steam converter valve, is characterized in that, the ft connection of described oil hydraulic cylinder adopts pressurized air as the hydraulic proportional pump of power.
3. power station as claimed in claim 1 hp and lp bypass steam converter valve, is characterized in that, described graphite balance ring is in series with and opens formula pilot valve in advance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520485576.1U CN204805569U (en) | 2015-07-03 | 2015-07-03 | Power plant high -low pressure bypass subtracts steam converter valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520485576.1U CN204805569U (en) | 2015-07-03 | 2015-07-03 | Power plant high -low pressure bypass subtracts steam converter valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204805569U true CN204805569U (en) | 2015-11-25 |
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ID=54590398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520485576.1U Expired - Fee Related CN204805569U (en) | 2015-07-03 | 2015-07-03 | Power plant high -low pressure bypass subtracts steam converter valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204805569U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499827A (en) * | 2016-11-22 | 2017-03-15 | 辽宁大唐国际锦州热电有限责任公司 | The low side valve of protection against erosion |
-
2015
- 2015-07-03 CN CN201520485576.1U patent/CN204805569U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499827A (en) * | 2016-11-22 | 2017-03-15 | 辽宁大唐国际锦州热电有限责任公司 | The low side valve of protection against erosion |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151125 Termination date: 20180703 |