CN110220028A - Lower coal valve for power plant boiler - Google Patents
Lower coal valve for power plant boiler Download PDFInfo
- Publication number
- CN110220028A CN110220028A CN201910540933.2A CN201910540933A CN110220028A CN 110220028 A CN110220028 A CN 110220028A CN 201910540933 A CN201910540933 A CN 201910540933A CN 110220028 A CN110220028 A CN 110220028A
- Authority
- CN
- China
- Prior art keywords
- valve
- flashboard
- slot hole
- long slot
- lower coal
- 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.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/044—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0281—Guillotine or blade-type valves, e.g. no passage through the valve member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention discloses a kind of lower coal valves for power plant boiler, this lower coal valve is equipped with long slot hole in valve body side, positioning framework is set to valve body side and face long slot hole, upper rail is set to valve interior wall and positioning framework inner wall and is located at the upper edge of long slot hole, several idler wheels are set to valve body and positioning framework inner wall and are located at the lower edge of long slot hole, flashboard level is set in positioning framework and between upper rail and several idler wheels, cylinder is set to positioning framework tail end and piston rod connects flashboard tail end, cylinder driving flashboard is mobile and will separate above valve body with the material of lower section and flame when being moved in valve body through long slot hole, movable pressing board is set to valve outer wall and is located at long slot hole two sides, it keeps off fiery padding and is set to the top and bottom between the movable pressing board of long slot hole two sides and being located at flashboard.The action response speed of this lower coal valve is fast, and valve quick closedown and can be closed tight, avoid igniting it is coal-fired, burn out conveyor belt, it is ensured that the safe and reliable operation of power plant boiler.
Description
Technical field
The present invention relates to a kind of lower coal valves for power plant boiler.
Background technique
In thermal power plant, most of boiler fired coal uses belt horizontal feed, and vertical drop enters furnace when to boiler coal feed point
Thorax burning, before the fire coal in belt conveyor conveyor belt enters boiler coal feed point, the coal-fired vertical feed opening of belt conveyor
Linkage control is formed equipped with lower coal valve and with the furnace pressure of belt conveyor speed, boiler combustion situation and coal feed point.
The mechanism of lower coal valve is as follows:
1. hearth combustion needs coal, lower coal valve is opened, belt conveyor coal supply；
2. belt conveyor revolving speed is improved to increase coal supply amount when boiler need to increase load；
3. belt turn conveyor speed is reduced to reduce coal supply amount when boiler need to reduce load；
4. positive pressure exception, which occurs, in burner hearth need to stop rapidly coal-fired Belt Conveying, while fast when flame is sprayed to coal feed point anti-channeling
Speed closes lower coal valve, blocks flame to prolong combustion upwards, prevents the fire coal for burning out conveyor belt and igniting in conveyor belt.
Due to the limitation of boiler structure and equipment installation space, belt conveyor feed opening at a distance from boiler furnace mouth compared with
Closely, burner hearth positive pressure anti-channeling flame the outspoken speed of downward coal can spray immediately, can hinder this requires lower coal valve energy quick closedown and quickly
Cutoff flame.
Lower coal valve mostly uses greatly motor driven at present, and closing motion responds slower, the fire coal for the Belt Conveying that easily ignites, and
Burn out conveyor belt；Meanwhile flashboard easily blocks, and leads to motor burning, valve cannot be normally opened and closed, so that blanking port coal charge is gathered around
Stifled, valve closes failure, and the fire coal for the Belt Conveying that ignites when spraying on flame simultaneously burns out conveyor belt.Also there is lower coal valve using gas
Cylinder driving, but matching is improper, there is a problem of that closing driving is slow, causes not spraying on cutting flame when burner hearth positive pressure exception,
It ignites coal-fired and then burns out conveyor belt.
Since lower coal valve is applied to bad working environments, coal-burning particle and coal dust are frequently occluded the movable passageway of flashboard, such as valve
Flashboard is withstood by coal-burning particle when closing, causes flashboard stuck, is unable to quick closedown or is not closed completely, so that valve is anti-when being closed
It alters flame still to spray into from flashboard front end face and side, the fire coal for the lower coal valve feed side that ignites burns out belt.Simultaneously as combustion
Frictional static characteristic when coal falls, lower coal valve side of producing coal are easy to overwork coal-fired dust, and the valve that causes to ignite when positive pressure flame goes out
Coal side coal dust and fire of climbing, so that the valve that ignites burns out conveyor belt into coal side fire coal.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of lower coal valve for power plant boiler, this lower coal valve overcomes
The defects of conventional valves, improves the action response speed of lower coal valve, and valve quick closedown and can be closed tight, avoid igniting it is coal-fired,
Burn out conveyor belt, it is ensured that the safe and reliable operation of power plant boiler.
In order to solve the above technical problems, lower coal valve of the present invention for power plant boiler includes valve body, flashboard and posting
Frame further includes upper rail, several idler wheels, keeps off fiery padding, movable pressing board and cylinder, and the valve body side is equipped with long slot hole, described
Positioning framework is set to long slot hole described in the valve body side and face, and the upper rail is set to the valve interior wall and posting
Frame inner wall and the upper edge for being located at the long slot hole, several idler wheel intervals are set to the valve interior wall and positioning framework inner wall
And be located at the long slot hole lower edge, if the flashboard level be set to the positioning framework in and be located at the upper rail with
Between dry milling wheel, flashboard is inserted into valve chamber by long slot hole, and the cylinder is set to the positioning framework tail end and piston rod connects
The flashboard tail end is connect, the cylinder drives the flashboard to move along the upper rail and several idler wheels and through the long slot hole
It will separate above valve body with the material of lower section and flame when being moved in the valve body, the movable pressing board is set to outside the valve body
Wall and it is located at the long slot hole two sides, it is described to keep off fiery padding and be set between the movable pressing board of the long slot hole two sides and be located at
The top and bottom of the flashboard.
Further, this lower coal valve further includes conical flow guiding liner plate, and the conical flow guiding liner plate is set to the valve interior wall simultaneously
And it is located at the top of the upper rail.
Further, this lower coal valve further includes drawing head, and the drawing head front end is clamped and connected the flashboard tail by pin
Clamping gap is held and has, the traction tail end connects the piston rod of the cylinder.
Further, the pin hole of the drawing head is lateral elliptical aperture.
Further, this lower coal valve further includes hard alloy arc panel, and the hard alloy arc panel is set in the valve body
Flashboard front end face described in wall and face, hard alloy arc panel two sides are equipped with introduction bevel and hard alloy arc panel
It meets to the end face of the flashboard and is equipped with sword corner cut, the flashboard is along the upper rail and several idler wheels against the extremely hard alloy
When arc panel, the flashboard pushes against closing for the hard alloy arc panel and flashboard front end face under introduction bevel guidance
Camber line of the zygonema both sides symmetrically along hard alloy arc panel moves to form shearing point from both sides to center.
Further, the flashboard is stainless steel plate, and front end face is equipped with end cutting edge and front end face two sides are respectively equipped with side
Cutting edge.
Further, the upper rail is 304 stainless steel flashboard guide rail of square.
Further, several idler wheels pass through wheel respectively and are located in the valve interior wall and positioning framework inner wall, the wheel
Axis extends with positioning framework inner wall outside on the outside of the valve interior wall and is equipped with pouring orifice in elongated end.
Further, this lower coal valve further includes mounting base, and the cylinder is set to the positioning framework tail by the mounting base
End.
Further, at both ends, driving air inlet configures rapid escape valve to the cylinder simultaneously, when cylinder end drives air inlet
When mouthful air inlet, which is closed, and corresponds to the rapid escape valve of the other end and muffler is opened.
Further, the long slot hole two sides have refractory seals filler to be pressed in flashboard two sides.
Further, the flashboard feed side design has cone bucket shape blanking port.
Lower coal valve due to the present invention for power plant boiler uses above-mentioned technical proposal, i.e., this lower coal valve is set in valve body side
There is long slot hole, positioning framework is set to valve body side and face long slot hole, and upper rail is set to valve interior wall and positioning framework inner wall
And it is located at the upper edge of long slot hole, several idler wheel intervals are set to valve interior wall and positioning framework inner wall and are located under long slot hole
Edge, flashboard level are set in positioning framework and between upper rail and several idler wheels, and cylinder is set to positioning framework tail end simultaneously
And piston rod connects flashboard tail end, cylinder driving flashboard moves along upper rail and several idler wheels and is moved to valve body through long slot hole
It will separate above valve body with lower section when interior, movable pressing board is set to valve outer wall and is located at long slot hole two sides, keeps off fiery padding and is set to
Top and bottom between the movable pressing board of long slot hole two sides and positioned at flashboard.This lower coal valve overcomes lacking for conventional valves
Fall into, improve the action response speed of lower coal valve, valve quick closedown and can be closed tight, have response quickly, close it is smooth tight etc.
Feature, it is reliable to completely cut off positive pressure flame and material, avoid igniting it is coal-fired, burn out conveyor belt, it is ensured that the safety of power plant boiler can
By operation.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:
Fig. 1 is structural schematic diagram of the present invention for the lower coal valve of power plant boiler；
Fig. 2 is this lower coal valve closing state schematic diagram；
Fig. 3 is this lower coal valve blanking schematic diagram；
Fig. 4 is flashboard structure schematic diagram in this lower coal valve；
Fig. 5 is the top view of Fig. 4.
Specific embodiment
Embodiment is as depicted in figs. 1 and 2, and the present invention includes valve body 1, flashboard 2 for the lower coal valve of power plant boiler and determines
Position frame 3 further includes that upper rail 4, several idler wheels 5, the fiery padding 6 of gear, movable pressing board 7 and cylinder 8,1 side of valve body are equipped with
Long slot hole, the positioning framework 3 are set to long slot hole described in 1 side of valve body and face, and the upper rail 4 is set to the valve
1 inner wall of body and 3 inner wall of positioning framework and the upper edge for being located at the long slot hole, several intervals of idler wheel 5 are set to the valve body 1
Inner wall and 3 inner wall of positioning framework and the lower edge for being located at the long slot hole, the flashboard 2 is horizontal to be set in the positioning framework 3
And between the upper rail 4 and several idler wheels 5, the cylinder 8 is set to 3 tail end of positioning framework and piston rod connects
2 tail end of flashboard is connect, the cylinder 8 drives the flashboard 2 to move along the upper rail 4 and several idler wheels 5 and through described
1 top of valve body is separated with lower section when long slot hole is moved in the valve body 1, the movable pressing board 7 is set to 1 outer wall of valve body
And it is located at the long slot hole two sides, it is described to keep off fiery padding 6 between the movable pressing board 7 of the long slot hole two sides and be located at
The top and bottom of the flashboard 2.
As shown in Figure 3, it is preferred that this lower coal valve further includes conical flow guiding liner plate 11, and the conical flow guiding liner plate 11 is set to
1 inner wall of valve body and the top for being located at the upper rail 4.Conical flow guiding liner plate can prevent coal charge when falling to valve interior wall
Erosive wear, while making the less accumulation of material at upper rail, keep the relative clean at upper rail；The coal charge of whereabouts is in flashboard
Downside is not contacted with valve interior wall, forms vortex when blanking on the downside of flashboard, which can remove fuel coal dust in this region
The absorption of valve interior wall, when boiler coal-in port flame, which can block, climbs fire along valve interior wall.
As shown in Figure 1, it is preferred that this lower coal valve further includes drawing head 81, and 81 front end of drawing head is pressed from both sides by pin 82
It holds connection 2 tail end of flashboard and there is clamping gap, 81 tail end of drawing head connects the piston rod of the cylinder 8.It leads
Leader connects flashboard using multiple pins, and drawing head and flashboard have biggish clamping gap, which can make flashboard exist
There is one to move freely gap along pin vertical direction in drawing head, to prevent cylinder piston rod and flashboard not dead.
Preferably, the pin hole of the drawing head 81 is lateral elliptical aperture.Traction pin can have a cross in elliptical aperture
To movable leeway, valve transverse direction geometric dimension is avoided to deviate and cause cylinder piston rod not dead with flashboard.
Preferably, this lower coal valve further includes hard alloy arc panel 12, and the hard alloy arc panel 12 is set to the valve
2 front end face of flashboard described in 1 inner wall of body and face, 12 two sides of hard alloy arc panel are equipped with introduction bevel and hard closes
Golden arc panel 12 meets to the end face of the flashboard 2 and is equipped with sword corner cut, the flashboard 2 along the upper rail 4 and several idler wheels 5 against
When to the hard alloy arc panel 12, the flashboard 2 pushes against the hard alloy arc panel under introduction bevel guidance
12 and the closed line both sides of 2 front end face of flashboard symmetrically move to be formed from both sides to center along the camber line of hard alloy arc panel 12
Shearing point.When flashboard all imports and pushes against hard alloy arc panel, cutting flame sprays open fire to flashboard top, meanwhile, lock
Closed line will be formed if any coal-burning particle or other small blocks between hard alloy arc panel and flashboard when plate imports
Shearing point shreds, to make the closely sealed closing of flashboard.
As shown in Figure 4 and Figure 5, it is preferred that the flashboard 2 is stainless steel plate, and front end face is equipped with end cutting edge 21 and preceding
End face two sides are respectively equipped with side cutting edge 22.Flashboard uses high temperature resistant, has the stainless steel plate of hardness to make, to guarantee that flashboard is indeformable
And there is certain finish；Side blade angle is 45 °, which can push to the fire coal in upper rail intermediate and be fallen,
Guarantee that flashboard moves in upper rail not being stuck；The front end face of flashboard designs end cutting edge at 45 °, and the end cutting edge and hard close
The sword corner cut of golden arc panel cooperates, and can shred the block that front end stops when valve is closed, and then close flashboard in place.
Preferably, the upper rail 4 is 304 stainless steel flashboard guide rail of square.304 stainless steels have stainless, certainly sliding
Function can prevent flashboard to the abrasion at valve body edge, avoid fire coal in the hardened of upper rail；Upper rail is on flashboard top simultaneously
Right-angle side can block flame open fire to leak upwards, and flame open fire after a right angle turns extinguishes；The design of square guide rail
It is avoided that guide rail is blocked by fire coal, fire coal can be fallen downwards with ram movement in guide rail, guarantee that flashboard is transported in square guide rail
It moves free and relaxed, the resistance of motion of flashboard is reduced, to guarantee that the closing speed of flashboard is greatly speeded up.
As shown in Figure 3, it is preferred that several idler wheels 5 are set to 1 inner wall of valve body and posting by wheel shaft 51 respectively
3 inner wall of frame, the wheel shaft 51 extend 1 inner wall outside of valve body and 3 inner wall outside of positioning framework and are equipped in elongated end
Pouring orifice 52.Idler wheel guarantees that contact of the flashboard with upper rail is closely sealed, prevents upper rail from accumulating fire coal, while reducing ram movement
Resistance；Idler wheel can be used two kinds of different metal materials with wheel shaft and match simultaneously, mitigation component autogenous grinding as far as possible；Pass through the note of wheel shaft
Hydraulic fluid port can squeeze into lubricating oil, keep idler wheel rotation flexible.
As shown in Figure 2, it is preferred that this lower coal valve further includes mounting base 83, and the cylinder 8 is set to by the mounting base 83
3 tail end of positioning framework.
As shown in Figure 1, it is preferred that at both ends, driving air inlet configures rapid escape valve 84 to the cylinder 8 simultaneously, works as cylinder
When 8 certain end drive inlet charge, which is closed, and corresponds to the rapid escape valve 84 and muffler of the other end
Open.By the Quick air-discharge of rapid escape valve, the sensitivity of cylinder movement is improved, to improve the lower coal valve of cylinder driving
The response speed of flashboard.
This lower coal valve is placed outside in positioning framework using cylinder driving, flashboard in valve body, and flashboard is driven by the cylinder along above leading
Rail and the self-positioning frame of several idler wheels are moved in valve body, to realize the opening and closing of lower coal valve；It keeps off fiery padding and passes through work
Dynamic pressure plate is placed on the outside of the long slot hole of valve body, and flame is avoided to scurry out from long slot hole；By reasonable selection cylinder, strength driving has
Driving force is big, the few feature of failure, carries out matching primitives to driving force, drive gas flow amount, shut-in time, improves lower coal valve
Response speed, it is ensured that the reliability of lower coal valve events is simultaneously closed tight.
This lower coal valve is suitable for the conveying of big flow particle and powder fire coal, can quickly block/open-minded, it blocks outside open fire
It alters, the occasion particularly suitable for heat power plant boiler fuel-feed.
Claims (12)
1. a kind of lower coal valve for power plant boiler, including valve body, flashboard and positioning framework, it is characterised in that: on further including
Guide rail, several idler wheels keep off fiery padding, movable pressing board and cylinder, and the valve body side is equipped with long slot hole, and the positioning framework is set to
Long slot hole described in the valve body side and face, the upper rail are set to the valve interior wall and positioning framework inner wall and position
In the upper edge of the long slot hole, several idler wheel intervals are set to the valve interior wall and positioning framework inner wall and are located at described
The lower edge of long slot hole, the flashboard level are set in the positioning framework and between the upper rail and several idler wheels,
Flashboard is inserted into valve chamber by long slot hole, and the cylinder is set to the positioning framework tail end and piston rod connects the flashboard tail
End, the cylinder drive the flashboard to move along the upper rail and several idler wheels and be moved to the valve through the long slot hole
It will separate above valve body with the material of lower section and flame when in vivo, the movable pressing board is set to the valve outer wall and is located at institute
State long slot hole two sides, the top for keeping off fiery padding between the movable pressing board of the long slot hole two sides and be located at the flashboard
Face and bottom surface.
2. the lower coal valve according to claim 1 for power plant boiler, it is characterised in that: this lower coal valve further includes taper
Water conservancy diversion liner plate, the conical flow guiding liner plate are set to the valve interior wall and are located at the top of the upper rail.
3. the lower coal valve according to claim 1 for power plant boiler, it is characterised in that: this lower coal valve further includes traction
Head, the drawing head front end by pin be clamped and connected the flashboard tail end and have clamping gap, the traction tail end
Connect the piston rod of the cylinder.
4. the lower coal valve according to claim 3 for power plant boiler, it is characterised in that: the pin hole of the drawing head
For lateral elliptical aperture.
5. the lower coal valve according to claim 1,2 or 3 for power plant boiler, it is characterised in that: this lower coal valve also wraps
Hard alloy arc panel is included, the hard alloy arc panel is set to flashboard front end face described in the valve interior wall and face, institute
Hard alloy arc panel two sides are stated equipped with introduction bevel and hard alloy arc panel is met to the end face of the flashboard and cut equipped with sword
Angle, the flashboard along the upper rail and several idler wheels against to the hard alloy arc panel when, the flashboard is led described
Enter the closed line both sides that the hard alloy arc panel and flashboard front end face are pushed against under inclined-plane guidance symmetrically along hard alloy arc
The camber line of shape plate forms shearing point from both sides to center movement.
6. the lower coal valve according to claim 5 for power plant boiler, it is characterised in that: the flashboard is stainless steel
Plate, front end face is equipped with end cutting edge and front end face two sides are respectively equipped with side cutting edge.
7. the lower coal valve according to claim 6 for power plant boiler, it is characterised in that: the upper rail is square
304 stainless steel flashboard guide rails.
8. according to claim 1, being used for the lower coal valve of power plant boiler described in 5, it is characterised in that: several idler wheel difference
It is located in the valve interior wall and positioning framework inner wall by wheel, the wheel shaft extends on the outside of the valve interior wall and posting
Frame inner wall outside and elongated end be equipped with pouring orifice.
9. the lower coal valve according to claim 1 for power plant boiler, it is characterised in that: this lower coal valve further includes installation
Seat, the cylinder are set to the positioning framework tail end by the mounting base.
10. according to claim 1, being used for the lower coal valve of power plant boiler described in 9, it is characterised in that: the cylinder exists simultaneously
Both ends drive air inlet to configure rapid escape valve, and when cylinder end drives inlet charge, which is closed, and
The rapid escape valve and muffler of the corresponding other end are opened.
11. the lower coal valve according to claim 1,2 or 3 for power plant boiler, it is characterised in that: the long slot hole two
Side has refractory seals filler to be pressed in flashboard two sides.
12. the lower coal valve according to claim 1 or 2 for power plant boiler, it is characterised in that: the flashboard feed side
Design has cone bucket shape blanking port.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811297552.8A CN109282068A (en) | 2018-11-01 | 2018-11-01 | Lower coal valve for power plant boiler |
| CN2018112975528 | 2018-11-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110220028A true CN110220028A (en) | 2019-09-10 |
Family
ID=65174384
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811297552.8A Withdrawn CN109282068A (en) | 2018-11-01 | 2018-11-01 | Lower coal valve for power plant boiler |
| CN201910540933.2A Pending CN110220028A (en) | 2018-11-01 | 2019-06-21 | Lower coal valve for power plant boiler |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811297552.8A Withdrawn CN109282068A (en) | 2018-11-01 | 2018-11-01 | Lower coal valve for power plant boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN109282068A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396571A (en) * | 2020-03-12 | 2020-07-10 | 杭州富阳恒通机电工程有限公司 | Electric flow control arc valve |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109282068A (en) * | 2018-11-01 | 2019-01-29 | 上海理工大学 | Lower coal valve for power plant boiler |
| CN112361000A (en) * | 2020-10-28 | 2021-02-12 | 张家港宏昌钢板有限公司 | Pneumatic gate valve device with external guide wheel |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2246922A1 (en) * | 1998-08-24 | 2000-02-24 | Technaflow, Inc. | Split knife gate valve having a uniformly compressed and constrained resilient gate seat and method for producing the same |
| CN103836217A (en) * | 2012-11-27 | 2014-06-04 | 哈尔滨弘盛电力设备有限公司 | Wedge-shaped door plank device |
| CN203717990U (en) * | 2013-10-28 | 2014-07-16 | 哈尔滨宏万智科技开发有限公司 | Slide plate gate |
| CN105257846A (en) * | 2015-11-25 | 2016-01-20 | 无锡山川环保机械有限公司 | Flange type pneumatic inserting plate valve |
| CN205260978U (en) * | 2015-12-22 | 2016-05-25 | 新兴能源装备股份有限公司 | Canned type pneumatic gate valve for buggy |
| CN205534311U (en) * | 2016-04-08 | 2016-08-31 | 合肥锦鸿机械制造有限公司 | Pneumatic roller type sealing gate valve |
| CN206754415U (en) * | 2017-04-17 | 2017-12-15 | 河南众森电力设备有限公司 | One kind singly drives electro-hydraulic push-pull valve |
| CN109282068A (en) * | 2018-11-01 | 2019-01-29 | 上海理工大学 | Lower coal valve for power plant boiler |
-
2018
- 2018-11-01 CN CN201811297552.8A patent/CN109282068A/en not_active Withdrawn
-
2019
- 2019-06-21 CN CN201910540933.2A patent/CN110220028A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2246922A1 (en) * | 1998-08-24 | 2000-02-24 | Technaflow, Inc. | Split knife gate valve having a uniformly compressed and constrained resilient gate seat and method for producing the same |
| CN103836217A (en) * | 2012-11-27 | 2014-06-04 | 哈尔滨弘盛电力设备有限公司 | Wedge-shaped door plank device |
| CN203717990U (en) * | 2013-10-28 | 2014-07-16 | 哈尔滨宏万智科技开发有限公司 | Slide plate gate |
| CN105257846A (en) * | 2015-11-25 | 2016-01-20 | 无锡山川环保机械有限公司 | Flange type pneumatic inserting plate valve |
| CN205260978U (en) * | 2015-12-22 | 2016-05-25 | 新兴能源装备股份有限公司 | Canned type pneumatic gate valve for buggy |
| CN205534311U (en) * | 2016-04-08 | 2016-08-31 | 合肥锦鸿机械制造有限公司 | Pneumatic roller type sealing gate valve |
| CN206754415U (en) * | 2017-04-17 | 2017-12-15 | 河南众森电力设备有限公司 | One kind singly drives electro-hydraulic push-pull valve |
| CN109282068A (en) * | 2018-11-01 | 2019-01-29 | 上海理工大学 | Lower coal valve for power plant boiler |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396571A (en) * | 2020-03-12 | 2020-07-10 | 杭州富阳恒通机电工程有限公司 | Electric flow control arc valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109282068A (en) | 2019-01-29 |
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Application publication date: 20190910 |
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| RJ01 | Rejection of invention patent application after publication |