CN204664444U - A kind of mazy type valve sealing device - Google Patents
A kind of mazy type valve sealing device Download PDFInfo
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- CN204664444U CN204664444U CN201520271609.2U CN201520271609U CN204664444U CN 204664444 U CN204664444 U CN 204664444U CN 201520271609 U CN201520271609 U CN 201520271609U CN 204664444 U CN204664444 U CN 204664444U
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Abstract
A kind of mazy type valve sealing device, comprises, valve body; Two flaps, semicircle plate body, is installed on valve shaft both sides respectively, and is located in valve body; Two valve seal seats, semicircle plate body, is installed on valve shaft both sides respectively, parallel relative with flap; Flap, valve seal seat and valve shaft coordinate formation valve, and valve-closed position is that valve and Vertical direction deflect 3 ~ 6 degree; The relative flap side projection one in valve seal seat outer end block, block relative flap one side epirelief establishes comb teeth-shaped structure, flap side is the comb teeth-shaped structure that mutually can plant with block comb teeth-shaped structure of projection also, and these two the comb teeth-shaped structures that can mutually plant form labyrinth seal structures; Adjusting seat and adjustment screw, be located at valve body inner bottom part central authorities, and adjustment screw is against a valve seal seat.The utility model changes valve sealing structure, improves sealability and the precision of valve group, reduces or stop gas leakage, reduce catastrophic failure, extend working life.
Description
Technical field
The utility model relates to blast furnace gas pressure regulating equipment, particularly a kind of mazy type valve sealing device, is applicable to the guard valve class of coal-gas turbine.
Background technique
Current medium-and-large-sized blast furnace high pressure gas is widely used TRT and carries out energy regenerating, and intrinsic coal gas pressure regulator valve group and TRT generator set are installed in parallel, and effect runs when TRT generator set maintenance down or unit break down.Therefore the intrinsic theory of reducer unit changes.
We know that TRT is a kind of energy recycle device, and in theory, whole coal gas that it is attempted blast furnace occurs enter the conversion that turbine set carries out energy; Therefore we think that reducer unit does not just have pressure regulation effect, also must have the effect of contract fully when TRT runs.
But the reducer unit adopted at present only ensures quick unlatching, the effect of adjustment blast furnace top pressure, as requiring very low to leakage during reducer unit contract fully, to such an extent as to has a certain amount of coal gas when TRT runs by the short circuit of pressure regulator valve group.Cause the waste of energy.
Summary of the invention
The purpose of this utility model is to design a kind of mazy type valve sealing device, changes valve sealing structure, improves sealability and the precision of valve group, reduce or to stop in TRT running coal gas from reducer unit internal leakage, improve TRT generated energy, reduce catastrophic failure, extend working life.
For achieving the above object, the technical solution of the utility model is:
A kind of mazy type valve sealing device, it comprises, valve body; Two flaps, semicircle plate body, is installed on valve shaft both sides respectively, and is arranged in described valve body; Two valve seal seats, semicircle plate body, is installed on described valve shaft both sides respectively, parallel relative with flap; Flap, valve seal seat and valve shaft coordinate formation valve, and valve-closed position is that valve and Vertical direction deflect 3 ~ 6 degree; The relative flap side projection one in described valve seal seat outer end block, this block establishes some comb teeth-shaped structures relative to flap one side epirelief, relative, flap side is the comb teeth-shaped structure that mutually can plant with block comb teeth-shaped structure of projection also, these two the comb teeth-shaped structures that can mutually plant form labyrinth seal structure, it is clearance seal, the gap of namely establishing an air feed to flow through between flap, valve seal seat comb teeth-shaped structure; Adjusting seat and on adjustment screw, be arranged at described valve body inner bottom part central authorities, this adjustment screw is against a valve seal seat.
Further, the tooth tip of the comb teeth-shaped structure of described valve seal seat, flap being planted mutually is adjustable relative to the gap length at the bottom of the other side's tooth.
The utility model is in order to solve valve leakage, the original seal form of valve will be changed, former design is clearance seal (namely flap cylindrical and valve seat have a certain amount of matching gap) to prevent valve opening action to lose efficacy valve design, and closed position is adjusted an angle, valve leaves gap all the time.
When Gas Flow crosses the gap that sealing comb (moving) and comb (quiet) surface forms, air-flow receives a throttling action, at this moment the pressure and temperature of air-flow is declined, and flow velocity is increased, it is the larger cavity that two sealing comb are formed after gap, coal gas volume in this cavity increases and speed declines, and form vortex motion, produce certain heat energy.Therefore gas makes before gas temperature got back to again throttling in this cavity, gas is often just subject to a throttling and dilatation through a gap and larger cavity air-flow subsequently, along with increasing and the reduction of gap width of gas through gaps and number of cavities, the flow velocity of coal gas and pressure drop is increasing no longer continues outflow until Pressure Drop to coal gas during approximate back pressure, thus achieve sealing.Can adjust tooth tip gap H1, H2 size, improve throttling and pressure drop effect, stop coal gas internal leakage to greatest extent.
The beneficial effects of the utility model:
The utility model improves the generated energy of TRT generator set by the sealability improving valve.Because medium is blast furnace gas and dust loading is higher, it is stuck that valve closes easy dust stratification for a long time, loses safety protection effect as guard valve.Therefore the utility model also plays stabilization in safety.This device can be widely used in long-term closedown, run into the guard valve of burst thing unlatching,
Accompanying drawing explanation
Fig. 1 is the front view of the utility model embodiment.
Fig. 2 is the sectional view of the utility model embodiment.
Fig. 3 is the A portion enlarged diagram of Fig. 2.
Embodiment
See Fig. 1 ~ Fig. 3, a kind of mazy type valve sealing device of the present utility model, it comprises, valve body 1; Two flaps 2,2 ', semicircle plate body, is installed on valve shaft 3 both sides respectively, and is arranged in described valve body 1; Two valve seal seats 4,4 ', semicircle plate body, is installed on described valve shaft 3 both sides respectively, with flap 2,2 ' parallel relative; Flap 2,2 ', valve seal seat 4,4 ' and valve shaft 3 coordinate and form valve, valve 3 closed position is that valve and Vertical direction deflect 3 ~ 6 degree; Described valve seal seat 4,4 ' outer end relative flap 2,2 ' side projection one block 41 is (for valve seal seat 4, lower same), this block 41 relatively flap 2 one side epirelief establishes some comb teeth-shaped structures 42, relative, flap 2 side is the comb teeth-shaped structure 21 that mutually can plant with block comb teeth-shaped structure 42 of projection also, these two the comb teeth-shaped structures that can mutually plant form labyrinth seal structure, it is clearance seal, the gap B namely establishing an air feed to flow through between flap, valve seal seat comb teeth-shaped structure 21,42; Adjusting seat 5 and on adjustment screw 6, be arranged at described valve body 1 inner bottom part central authorities, this adjustment screw 6 is against a valve seal seat 4 '.
Further, the tooth tip of the comb teeth-shaped structure of described valve seal seat, flap being planted mutually is adjustable relative to the gap length at the bottom of the other side's tooth.
When the valve is closed, rotated by valve shaft and make flap near valve seal seat, until flap comb (moving) and valve seal seat comb (quiet) are inlayed, if now air-flow moves as shown by arrows.
When gas flows through the gap that sealing tooth and axle surface forms, air-flow receives a throttling action, the pressure and temperature decline of air-flow, and flow velocity increase.
Air-flow, after gap, is the larger cavity that two sealing teeth are formed.Gas is in the long-pending increase suddenly of compartment, and form very strong vortex, in the cavity that volume ratio clearance volume is much larger, airspeed is no better than zero, and therefore, gas is in this cavity, and before temperature has got back to again throttling, but pressure gos up seldom.Gas is often through a gap and larger cavity subsequently, air-flow is just subject to a throttling and dilatation, the energy due to eddy loss, and air-flow is often after sealing tooth together, and a pressure drop class, follow the step-down of pressure, Leakage Gas just reduces.Until consistent with pipeline back pressure.
As can be seen from the above analysis, seal clearance is less, and the sealing number of teeth is more, and its sealing effect will be better.Therefore the adjustment screw installing a sound comb fixed gap in valve additional can adjust arbitrarily comb (moving) and comb (quiet) fixed gap H1, H2 by adjustment screw.
The utility model structure is simple, can greatly reduce the leakage of dielectric gas, applied widely.
Claims (2)
1. a mazy type valve sealing device, is characterized in that, comprises,
Valve body;
Two flaps, semicircle plate body, is installed on valve shaft both sides respectively, and is arranged in described valve body;
Two valve seal seats, semicircle plate body, is installed on described valve shaft both sides respectively, parallel relative with flap; Flap, valve seal seat and valve shaft coordinate formation valve, and valve-closed position is that valve and Vertical direction deflect 3 ~ 6 degree;
The relative flap side projection one in described valve seal seat outer end block, this block establishes some comb teeth-shaped structures relative to flap one side epirelief, relative, flap side is the comb teeth-shaped structure that mutually can plant with block comb teeth-shaped structure of projection also, these two the comb teeth-shaped structures that can mutually plant form labyrinth seal structure, it is clearance seal, the gap of namely establishing an air feed to flow through between flap, valve seal seat comb teeth-shaped structure;
Adjusting seat and on adjustment screw, be arranged at described valve body inner bottom part central authorities, this adjustment screw is against a valve seal seat.
2. mazy type valve sealing device as claimed in claim 1, is characterized in that, the tooth tip of the comb teeth-shaped structure that described valve seal seat, flap are planted mutually is adjustable relative to the gap length at the bottom of the other side's tooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520271609.2U CN204664444U (en) | 2015-04-29 | 2015-04-29 | A kind of mazy type valve sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520271609.2U CN204664444U (en) | 2015-04-29 | 2015-04-29 | A kind of mazy type valve sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204664444U true CN204664444U (en) | 2015-09-23 |
Family
ID=54134827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520271609.2U Expired - Fee Related CN204664444U (en) | 2015-04-29 | 2015-04-29 | A kind of mazy type valve sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204664444U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106594297A (en) * | 2016-12-29 | 2017-04-26 | 封海涛 | Labyrinth valve |
-
2015
- 2015-04-29 CN CN201520271609.2U patent/CN204664444U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106594297A (en) * | 2016-12-29 | 2017-04-26 | 封海涛 | Labyrinth valve |
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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: 20150923 Termination date: 20170429 |