CN203257478U - Heat-supplying and steam-extracting check valve drainage pipeline with valve clack control device - Google Patents
Heat-supplying and steam-extracting check valve drainage pipeline with valve clack control device Download PDFInfo
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- CN203257478U CN203257478U CN 201320269460 CN201320269460U CN203257478U CN 203257478 U CN203257478 U CN 203257478U CN 201320269460 CN201320269460 CN 201320269460 CN 201320269460 U CN201320269460 U CN 201320269460U CN 203257478 U CN203257478 U CN 203257478U
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- heat supply
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Abstract
The utility model discloses a heat-supplying and steam-extracting check valve drainage pipeline with a valve clack control device. The heat-supplying and steam-extracting check valve drainage pipeline comprises front and rear drainage pipes of a heat-supplying and steam-extracting check valve, wherein the front and rear drainage pipes are independent; and a connection pipe and an isolating valve are connected between the front and rear drainage pipes of the heat-supplying and steam-extracting check valve. The heat-supplying and steam-extracting check valve drainage pipeline disclosed by the utility model is simple in improved structure and is very low in improvement cost; the defects in the prior art are overcome and noises generated by frequently swinging a valve clack are eliminated; and the collision of the valve clack is controlled to not cause fatigue damages of a pipeline welding opening and pipeline metal tissues, so that the safe production is guaranteed.
Description
Technical field
The utility model example relates to thermoelectric connection factory Steam Turbine in Fire Power Plant heat supply steam bleeding system, relates in particular to a kind of heat supply with flap control gear non-return flap hydrophobic pipeline that draws gas.
Background technique
The heat supply non-return flap that draws gas is thermal power generation steam turbine heat supply steam bleeding system protective gear, prevents medium or aqueous reflux, and steam turbine is had protective action.Under the abnormal condition such as pipeline medium refluence, outage, accident, this valve can be closed moment, and the shut-in time was less than 0.5 second.
At present, power plant's two 300MW heat supplies unit since 2006 go into operation with regard to have heat supply draw gas non-return flap stopping heat supply after the problem of flap frequent swing, the nominal diameter of non-return flap is DN1000 because this heat supply is drawn gas, and it swings momentum frequent swing bump sound large and flap and valve seat and can both significantly feel in more than 20 meters place.The long-term existence of this problem will certainly cause pipe welding port and tube metal to organize fatigue damage, is having a strong impact on long-term safety, the stable operation of unit.
For the existence that addresses this problem, in major overhaul in 2010, the heat supply of two the 300MW heat supply units non-return flap actuator of drawing gas is transformed, not only will make bilateral air inlet cylinder into by one-sided air inlet cylinder, but also cylinder bore is increased to 270mm by 160mm, the heat supply non-return flap flap that draws gas has been increased the power of closing of one more than 200 kilogram (cylinder piston 270mm, air pressure are 0.5MPa) in addition.From improved runnability, effect is not ideal, has just reduced the amplitude of fluctuation of flap, swings bump and still exists.
Adopt the method for intensifying cylinder piston diameter, be limited by field position, can't arrange, improvement expenses is expensive besides, and the heat supply of 300MW heat supply unit drawn gas after non-return flap actuator piston diameter strengthens and make the bilateral air inlet into, although the heat supply non-return flap flap that draws gas has been increased in addition one more than 200 kilogram and has closed power, but compare with more than the 3100 high kilogram opening forces of flap under the vapor pressure effect of diameter 1000, differ too many, so by having made bilateral air inlet cylinder into and the way that cylinder bore strengthens is solved the draw gas swing of non-return flap flap of heat supply by one-sided air inlet cylinder, bump.
The model utility content
The utility model provides a kind of heat supply with flap control gear non-return flap hydrophobic pipeline that draws gas, and in order to solve defective of the prior art, realizes eliminating noise, and control flap bump improves the purpose of safety in production.
The utility model is achieved through the following technical solutions:
A kind of heat supply with flap control gear non-return flap hydrophobic pipeline that draws gas comprises: the heat supply drain pipe before and after the non-return flap that draws gas, described front and back drain pipe is independently, connects a liaison tube and an isolating valve between the drain pipe before and after non-return flap is drawn gas in described heat supply.
Described liaison tube and former front and back drain pipe are isometrical, and described isolating valve is the DN32 valve.
Description of drawings
Fig. 1 is the heat supply non-return flap hydrophobic pipeline schematic representation that draws gas in the prior art.
Fig. 2 is the heat supply with the flap control gear described in the utility model non-return flap hydrophobic pipeline schematic representation that draws gas.
Embodiment
For the purpose, technological scheme and the advantage that make the utility model embodiment clearer, below in conjunction with the accompanying drawing among the utility model embodiment, technological scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment who obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment one
The present invention is exactly that will to solve the heat supply of the 300MW heat supply unit non-return flap flap both sides after stopping to heat of drawing gas be the pressure reduction that produces under the vapor action of 0.4MPa at pressure.Concrete grammar be with heat supply draw gas before and after the non-return flap original separately independently drain pipe combine by an isolating valve, after stopping to heat, open this isolating valve, the pressure reduction that heat supply is drawn gas before and after the non-return flap flap is balanced by the drain pipe that combines, and thoroughly eliminates the oscillatory forces that flap produces because of pressure reduction.
The heat supply of former heat supply unit is drawn gas non-return flap front and back drain pipe as shown in Figure 1, the heat supply of former heat supply unit draw gas before and after the non-return flap drain pipe independently installed additional one with isometrical liaison tube and the shut-off valve of former drain pipe, the heat supply of 300MW heat supply unit is drawn gas non-return flap front and back drain pipe schematic representation shown in 2 after improving, concrete scheme be with heat supply draw gas before and after the non-return flap original separately independently drain pipe get in touch with a liaison tube with former drain pipe isometrical 32 by an isolating valve DN32 and being in the same place, after stopping to heat, open this isolating valve, the pressure reduction that heat supply is drawn gas before and after the non-return flap flap is balanced by liaison tube, thoroughly eliminates the oscillatory forces that flap produces because of pressure reduction.The key point of the method is by the liaison tube balance heat supply original pressure difference before and after the non-return flap of drawing gas, as long as pressure reduction has been eliminated, just do not cause the power source that drawn gas heat supply the non-return flap flap swings, swung old problem so can effectively solve the heat supply flap of non-return flap after heating stops that drawing gas.
It should be noted that this isolating valve will place closed condition at heating period, make it hydrophobicly carry out work by former design system.This liaison tube and shutoff door only could be opened under the operating mode that stops to heat, because under the operating mode that stops to heat, fast valve is in closed condition, whether putting into operation of this liaison tube and shutoff door can not affect normal start and stop and the operation of unit.Under the heating operating mode, must close this liaison tube and shutoff door, move by former design draining system.If do not close this liaison tube and shutoff door in heating under the operating mode, just might cause unit to cause in the removal of load operating mode and exceed the speed limit or danger that generating unit speed can not fast reducing.
The utility model improves simple in structure, and improvement expenses is extremely low, solves defective of the prior art, has eliminated the noise that the flap frequent swing produces, and control flap bump causes pipe welding port and tube metal to organize fatigue damage, has guaranteed safety in production.
It should be noted that at last: above embodiment only in order to the technical solution of the utility model to be described, is not intended to limit; Although with reference to previous embodiment the utility model is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technological scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characteristics wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of each embodiment's technological scheme of the utility model.
Claims (2)
1. the heat supply with flap control gear non-return flap hydrophobic pipeline that draws gas, comprise the heat supply drain pipe before and after the non-return flap that draws gas, described front and back drain pipe is independently, it is characterized in that: connect a liaison tube and an isolating valve between the drain pipe before and after non-return flap is drawn gas in described heat supply.
2. the heat supply with the flap control gear according to claim 1 non-return flap hydrophobic pipeline that draws gas, it is characterized in that: described liaison tube and former front and back drain pipe are isometrical, and described isolating valve is the DN32 valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320269460 CN203257478U (en) | 2013-05-16 | 2013-05-16 | Heat-supplying and steam-extracting check valve drainage pipeline with valve clack control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320269460 CN203257478U (en) | 2013-05-16 | 2013-05-16 | Heat-supplying and steam-extracting check valve drainage pipeline with valve clack control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203257478U true CN203257478U (en) | 2013-10-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320269460 Expired - Fee Related CN203257478U (en) | 2013-05-16 | 2013-05-16 | Heat-supplying and steam-extracting check valve drainage pipeline with valve clack control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203257478U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112302735A (en) * | 2020-10-26 | 2021-02-02 | 华北电力科学研究院有限责任公司 | Steam turbine main valve auxiliary system and control method thereof |
-
2013
- 2013-05-16 CN CN 201320269460 patent/CN203257478U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112302735A (en) * | 2020-10-26 | 2021-02-02 | 华北电力科学研究院有限责任公司 | Steam turbine main valve auxiliary system and control method thereof |
| CN112302735B (en) * | 2020-10-26 | 2022-08-02 | 华北电力科学研究院有限责任公司 | Steam turbine main valve auxiliary system and control method thereof |
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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: 20131030 Termination date: 20170516 |