CN208070832U - Negative pressure type high temperature mill material transfer valve - Google Patents

Abstract

The utility model discloses a kind of negative pressure type high temperature mill material transfer valves, include a valve body with tapping channel, a valve deck with feeding-passage, and the valve body forms valve chamber with valve deck；One is located at the valve plate for controlling feeding-passage conducting in valve chamber；One is set to the valve deck lower face valve seat concentric with the feeding-passage.The tapping channel is located at the waist side of valve body and its center line intersects with the center line of the feeding-passage；Air inlet adjustment valve is additionally provided on the valve body；The valve plate is tightly attached to the lower face of valve seat.Feeding-passage in the utility model intersects with tapping channel center line, and the feeding-passage sealing surface of entire valve is formed between valve deck and valve plate.After valve is closed, the dust stratification in valve chamber will not cause to wear to sealing surface, be also easier to be sucked under the booster action of air inlet adjustment valve；It follows that the high temperature coal ash in the transfer valve is not easy to be formed in valve chamber hardened, valve plate retard motion will not be caused, situation not in place is switched.

Description

Negative pressure type high temperature mill material transfer valve

Technical field

The utility model is related to material transfer valves, more particularly to the abrasive disk type material conveying being applied in thermoelectricity ash disposal system Valve belongs to valve technology field.

Background technology

Millstone type material conveying valve is a kind of Special valve applied in power plant ash disposal system, can be mounted on and save coal The stations such as device, ash bucket, the feed inlet of storehouse pump, discharge port, switching exhaust, unimpeded.Material transfer valve in the prior art mainly has Positive pneumatic transport and negative-pressure pneumatic convey two kinds of forms.Wherein, negative-pressure pneumatic conveying is made using the suction of vaccum-pumping equipment With, so that conveyance conduit and equipment in system is in negative pressure state, transports material to gas-solid separating device and detached, negative pressure The advantages of Geldart-D particle is that ash disposal system always is in a state of negative pressure operation, and therefore, rarely powder leaks out, building ring Border is good.

The utility model of Patent No. CN200820029396.2 discloses a kind of for fired power generating unit dedusting of negative pressure system E type valves.The valve is arranged in parallel into and out of material mouth, by the door-plate (flashboard) controlled by push rod directly block or connect into and out of Material mouth.High temperature coal ash is piled up in before valve opening in the valve chamber on the upside of door-plate and door-plate, and therefore, high temperature coal ash is easy in upper side valve " hardened " and it is gradually accumulated hardening in chamber, the coal ash after accumulation hardening not only has compressed valve chamber space, is not easy to later stage valve chamber Cleaning, and push rod smooth can not be acted, finally cannot be satisfied the operating mode of efficient, the unobstructed operation of ash disposal system needs It asks.

The utility model of Publication No. CN206449219U discloses a kind of anti-wear-resisting moushroom valve of accumulation, by existing E types valve Door-plate (flashboard) structure design is mill structure, and uses the ramp structure of gradual transition in tapping channel, and object is prevented to reach The purpose of material heap product.Such structure has certain positive effect on solid accumulation, it is disadvantageous that the discharging of ramp structure Channel is similar to throttle valve operation principle, and in the segment of runner variation, flyash washes away seriously runner inner wall surface, is This, which prevents the high speed of flyash from washing away on tapping channel inner wall coated with a diamond coatings.Although logical Protection against erosion can be achieved the purpose that by crossing diamond coated coating, but sufficiently complex in construction technology, and not only diamond applies The cost of material of layer is higher, and coating processes cost is also higher, has seriously affected the marketing of the valve to a certain extent Degree.

Invention content

Based on described above, the purpose of this utility model be to provide it is a kind of be applied in thermoelectricity dedusting of negative pressure system, can have Effect prevents flyash hardened and can reduce the high temperature mill material transfer valve that coal ash medium washes away, which largely meets Negative-pressure pneumatic conveying technology develops to by grey device long-life, easy-maintaining requirement.

Technical scheme is as follows：

Negative pressure type high temperature mill material transfer valve includes a valve body with tapping channel, a valve with feeding-passage Lid, the valve body form valve chamber with valve deck, and one is located at the valve plate for controlling feeding-passage conducting in valve chamber, and one is set under valve deck The end face valve seat concentric with the feeding-passage.Innovation is that the tapping channel is located at the waist side of valve body and its center Line intersects with the center line of the feeding-passage；Air inlet adjustment valve is additionally provided on the valve body；The valve plate is tightly attached to valve seat The lower face of valve seat is tightly attached in lower face, specifically, valve plate under spring precompressed effect.

Further, the vertical and intersectant centerline of the center line of the feeding-passage and tapping channel.

Further, in order to ensure high temperature coal ash is more swimmingly sucked away along tapping channel, the air inlet adjustment valve is set In valve body waist side, specifically, the position of dust stratification is easiest on valve body waist side, this position can effectively adjust air inlet adjustment valve Adjustment effect.

Further, the dust stratification in valve chamber is cleared up and is overhauled for convenience, the lower end face charging of the valve body The position in channel is provided with access hole, and ash disposal maintenance closure plate is fitted in the access hole.When needing to clear up valve chamber dust stratification or folder When the foreign matter of band, dismantles lower ash disposal and overhaul closure plate；After cleaning out, reinstall.Moreover, in order to effectively drop Low high temperature coal ash falls ash and is washed away to the direct of windward side in valve body, and the inner wall of the ash disposal maintenance closure plate is equipped with closure plate wear body. Closure plate wear body adds the abrasion resistance that can greatly enhance ash disposal maintenance closure plate, extends valve service life.Even when length After time use, ash disposal maintenance closure plate fails because being washed, the closure plate dismantled and more renewed at that time, and whole without replacing A valve body not only reduces the manufacturing cost of valve body itself, also saves the time safeguarded and replaced.

Further, for the dust stratification service condition in daily observation valve chamber, the valve body-side waist is equipped with observation window.

Further, this transfer valve further includes the driving mechanism opened and closed for drive valve plate.The driving mechanism includes Cylinder set on valve deck upper end, the cylinder are connected by connecting plate, shaft, pivoted arm with valve plate.

The utility model has the beneficial effects that：

1, the feeding-passage in the utility model intersects with tapping channel center line, and the feeding-passage sealing of entire valve Face is formed between valve deck and valve plate.After valve is closed, the dust stratification in valve chamber will not cause to wear to sealing surface, in air inlet adjustment It is also easier to be sucked under the booster action of valve；It follows that the high temperature coal ash in the transfer valve is not easy to form plate in valve chamber Knot, will not cause valve plate retard motion, switch situation not in place.

2, the utility model has opened up access hole below face feeding-passage on valve body and has been provided in access hole Closure plate is overhauled, other than conveniently clearing up a small amount of sintering coal ash in valve chamber, it is often more important that, high temperature coal ash is opened in valve plate The moment opened, which washes away substantially to concentrate caused by valve body, to be transferred on the closure plate, therefore, in later maintenance, it is only necessary to more The closure plate is changed, for more existing E types valve, it is not necessary to entire body portion is replaced, the convenience of later maintenance is significantly improved, The maintenance cost for reducing the later stage meets the working condition requirement of thermoelectricity ash disposal system continuous operation.

Description of the drawings

Fig. 1 is transfer valve front view described in the utility model；

Fig. 2 is transfer valve vertical view described in the utility model；

Fig. 3 is the A-A of Fig. 2 to rotating clockwise 90 degree of sectional views.

In figure：1, valve body；10, tapping channel；11, closure plate is overhauled in ash disposal；110, closure plate wear body；12, observation window；2, valve Lid；20, feeding-passage；21, valve seat；3, valve plate；4, driving mechanism；40, cylinder；41, connecting plate；42, shaft；43, pivoted arm；5, Air inlet adjustment valve.

Specific implementation mode

The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1 to 3, the utility model discloses a kind of negative pressure type high temperature mill material transfer valves, including：One has The valve body 1 of tapping channel 10；One valve deck 2 with feeding-passage 20；The valve body 1 forms valve chamber with valve deck 2.It further include one In in valve chamber for control feeding-passage 20 conducting valve plate 3 and set on 2 lower face of valve deck and the feeding-passage 20 it is concentric Valve seat 21.The difference is that, the tapping channel 10 is located at the waist side of valve body 1 with existing E types valve, center line with it is described The center line of feeding-passage 20 intersects；The valve plate 3 is tightly attached to 2 lower face of valve deck.

Preferably, the feeding-passage 20 intersects vertically with tapping channel 10.At this point, by means of the air inlet tune on valve body 1 Valve 5 is saved, flyash is more conducive to and is pulled away, to reduce accumulation of the flyash in valve body.

As a kind of preferred embodiment, the position of the lower end face feeding-passage 20 of the valve body 1 is equipped with access hole, described Ash disposal maintenance closure plate 11 is fitted in access hole, the inner wall of the ash disposal maintenance closure plate 11 is equipped with closure plate wear body 110.This reality Closure plate 11 is overhauled with the lower section setting ash disposal of the novel face feeding-passage 20 on valve body 1, in addition to convenient to a small amount of in valve chamber Outside sintering coal ash is cleared up, it is often more important that, high temperature coal ash is basic to being washed away caused by valve body 1 in the moment that valve plate 3 is opened Upper concentration has been transferred on the closure plate, therefore, in later maintenance, it is only necessary to replace the closure plate, more existing E types valve and Speech, it is not necessary to replace entire body portion, significantly improve the convenience of later maintenance, reduce the maintenance cost in later stage, meet The working condition requirement of thermoelectricity ash disposal system continuous operation.Preferably, the dust stratification situation in valve chamber is observed for convenience, in valve body 1 Observation window 12 is equipped on the waist of side at access hole position.

Valve plate 3 in the utility model is plate-like, and valve plate 3 controls its folding by driving mechanism 4.Driving mechanism 4 includes Include the cylinder 40 set on 2 upper end of valve deck, the cylinder 40 is connected by connecting plate 41, shaft 42, pivoted arm 43 with valve plate 3. Specifically, shaft 42 is vertically situated on valve deck 2, and the upper end is connect by connecting plate 41 with cylinder 40, and lower end is by turning Arm 43 is connect with valve plate 3, when cylinder 40 works, pushes shaft 42 to rotate by connecting plate 41, when shaft 42 rotates, band turn Arm 43 rotates, and to drive valve plate 3 to switch on and off feeding-passage 20, completes the opening and closing function of conveying.

In addition, it should be noted that, the concepts such as upper end, lower end described in the present embodiment be relative to Figure of description and Speech, for those skilled in the art, when material transfer valve configuration occasion, station are different, in Figure of description The position legend presented should also be as adjusting accordingly, in other words, the concepts such as upper end, lower end may also change for left end, Right end；Either front end, rear end etc..

Above-described embodiment is the preferred embodiment of the utility model, is not the limitation to this practical technique scheme, only If without the technical solution that creative work can be realized on the basis of the above embodiments, it is regarded as falling into the present invention In the rights protection scope of patent.

Claims (8)

1. negative pressure type high temperature mill material transfer valve, including：One valve body (1) with tapping channel (10), one has charging logical The valve deck (2) in road (20), the valve body (1) form valve chamber with valve deck (2), and one is located in valve chamber for controlling feeding-passage (20) Set on valve deck (2) the lower face valve seat (21) concentric with the feeding-passage (20), feature exists the valve plate (3) of conducting and one In the tapping channel (10) is located at the waist side of valve body (1) and its center line intersects with the center line of the feeding-passage (20)； It is additionally provided with air inlet adjustment valve (5) on the valve body (1)；The valve plate (3) is tightly attached to the lower face of valve seat (21).

2. negative pressure type high temperature mill material transfer valve according to claim 1, which is characterized in that the feeding-passage (20) Center line and tapping channel (10) vertical and intersectant centerline.

3. negative pressure type high temperature mill material transfer valve according to claim 1 or 2, which is characterized in that the air inlet adjustment Valve (5) is set to the waist side of valve body (1).

4. negative pressure type high temperature mill material transfer valve according to claim 3, which is characterized in that under the valve body (1) Rectify and access hole is equipped with to the position of feeding-passage (20), ash disposal maintenance closure plate (11) is fitted in the access hole.

5. negative pressure type high temperature mill material transfer valve according to claim 4, which is characterized in that closure plate is overhauled in the ash disposal (11) inner wall is equipped with closure plate wear body (110).

6. negative pressure type high temperature mill material transfer valve according to claim 5, which is characterized in that the waist of the valve body (1) Observation window (12) is additionally provided on side.

7. negative pressure type high temperature mill material transfer valve according to claim 1, which is characterized in that the material transfer valve It further include the driving mechanism (4) for drive valve plate (3) folding.

8. negative pressure type high temperature mill material transfer valve according to claim 7, which is characterized in that the driving mechanism (4) include cylinder (40) set on valve deck (2) upper end, the cylinder (40) passes through connecting plate (41), shaft (42), pivoted arm (43) It is connected with valve plate (3).