CN105927759A - Four-way valve used for high-temperature flue gas and air switching - Google Patents
Four-way valve used for high-temperature flue gas and air switching Download PDFInfo
- Publication number
- CN105927759A CN105927759A CN201610524902.4A CN201610524902A CN105927759A CN 105927759 A CN105927759 A CN 105927759A CN 201610524902 A CN201610524902 A CN 201610524902A CN 105927759 A CN105927759 A CN 105927759A
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- CN
- China
- Prior art keywords
- flue gas
- temperature flue
- air switching
- cross valve
- valve
- 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.)
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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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/08—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks
- F16K11/085—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug
- F16K11/0853—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug having all the connecting conduits situated in a single plane perpendicular to the axis of the plug
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Lift Valve (AREA)
- Air Supply (AREA)
Abstract
The invention discloses a four-way valve used for high-temperature flue gas and air switching. The four-way valve comprises a valve body, four openings, a valve plate, a main shaft, two large end covers, a worm speed reducer, an explosion-proof electric motor with braking, a combined sealing brush, two bearing parts and a machine base. By means of the four-way valve, flow direction switching of high-temperature flue gas and high-temperature air is achieved; the advanced combined sealing brush manner is adopted for the valve plate, and therefore the inner leakage amount of the four-way valve during work is decreased to a low level; the valve plate is made to rotate in a single direction through an electric executor, and therefore the fatigue damage problem of the combined sealing brush under the high temperature and corrosion work conditions is avoided, the service life of the four-way valve is prolonged, and the smooth running rate of the four-way valve is increased; the thermal efficiency of a whole heat storage type air preheater system is improved; and the four-way valve saves energy and is environment-friendly.
Description
Technical field
The present invention relates to a kind of petrochemical heating furnace flue gas waste heat recovery system heat accumulating type air preheater for switching flue gas, sky
Air-flow to cross valve.Particularly to a kind of high-temperature flue gas and air switching cross valve.
Background technology
At present, in prior art, the cross valve of application in the flue gas and air flow switching of regenerative air preheater, majority also exists the problems such as leakage rate is big, sealing structural life-time is low, and its switching is all carried out in the way of the reciprocating rotary of valve plate, the scheme of i.e. two position four-way valves, when the most reciprocal switching, executor and component, by alternate stress effect, are easily damaged.
Summary of the invention
The technical problem to be solved is for cross valve leakage rate in above-mentioned prior art big, sealing structural life-time is low, when frequently back and forth switching, by alternate stress effect, it is easily damaged etc. not enough, it is provided that a kind of leakage rate is little, seal structural life-time length, do not allow flimsy high-temperature flue gas and air switching cross valve.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that
A kind of high-temperature flue gas and air switching cross valve include valve body, four openings, valve plate, main shaft, two big end caps, whirlpools
Wheel reductor, band brake fire-proof motor, combination sealing brush, two bearing portions and support.
The sidewall of described valve body is along the circumferential direction uniformly arranged described four openings.The top of described valve body and bottom are respectively equipped with a described big end cap, and each described big end cap is designed with a described bearing portions.Described main shaft is through the center of two described big end caps and two described bearing portions and is arranged on described two bearing portions.The middle part of described main shaft is provided with described valve plate, and the edge of described valve plate is provided with described combination sealing brush and the described combination sealing brush inner surface respectively with the inner surface of described valve body and big end cap and fits.The big end cap that described body base is arranged is provided with support.Described worm speed reducer is connected with the bottom of described main shaft and is arranged on described support.Described band brake fire-proof motor is connected with described worm speed reducer.
Wherein in an embodiment, each described bearing portions includes bearing, bearing block and gland.
Described bearing block is arranged on described big end cap.Described bearing is arranged on described main shaft.Described bearing is fixed on described bearing block by described gland.Described main shaft is arranged on described two bearing blocks through two described big end caps, two described bearing blocks and two described glands.
Wherein in an embodiment, described high-temperature flue gas and air switching cross valve also include four square tubes and four flanges.
Described four square tubes are separately positioned on described valve body and a corresponding described opening of described square tube.Described four flanges are arranged in described four square tubes and a corresponding described flange of described square tube.
Wherein in an embodiment, described high-temperature flue gas and air switching cross valve also include gusset.Described gusset is arranged on described valve plate.
Wherein in an embodiment, described high-temperature flue gas and air switching cross valve also include two keyways.Described two keyways are separately positioned on the two ends of described main shaft.
Wherein in an embodiment, described high-temperature flue gas and air switching cross valve also include wired graphite packing.Described wired graphite packing is arranged on the junction of described two big end caps and described main shaft.
Wherein in an embodiment, described high-temperature flue gas and air switching cross valve also include O RunddichtringO.Described O RunddichtringO is arranged on the junction of described two glands and described main shaft.
Wherein in an embodiment, described valve body is the columnar structured of three layers of hollow, and three layers from inside to outside are followed successively by inner core, the first ceramic fiber cotton layer and urceolus.The inner surface laminating of described combination sealing brush and described inner core.
Wherein in an embodiment, described big end cap is three layers, and three layers from inside to outside are followed successively by inwall, the second ceramic fiber cotton layer and outer wall.Described combination sealing brush fits with the inner surface of described inwall.
Wherein in an embodiment, described four openings are respectively smoke inlet, exhanst gas outlet, air intake and air outlet slit.Described smoke inlet is symmetrical arranged with described air outlet slit, and described exhanst gas outlet is symmetrical arranged with described air intake.
Advantages of the present invention and beneficial effect:
1, the present invention solves the flow direction switching of high-temperature flue gas and high temperature air, and valve plate uses advanced combination sealing brush mode, makes
When obtaining cross valve work, internal leakage amount is reduced to reduced levels.
2, the present invention uses YE to make valve plate one direction rotate, it is to avoid the fatigue damage problem under combination sealing brush high temperature, corrosive conditions, extends cross valve service life and smooth running rate.
3, the present invention improves the thermal efficiency of whole regenerative air preheater system.
4, energy-conserving and environment-protective of the present invention.
Accompanying drawing explanation
Fig. 1 is high-temperature flue gas and the top view of air switching cross valve.
Fig. 2 is high-temperature flue gas and the A-A sectional view of air switching cross valve in Fig. 1.
Fig. 3 is high-temperature flue gas and the top view of air switching cross valve in Fig. 2.
Fig. 4 is high-temperature flue gas and the working state figure of air switching cross valve.
Fig. 5 is high-temperature flue gas and air another working state figure of switching cross valve.
Detailed description of the invention
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is comprehensively described.Accompanying drawing gives the first-selected embodiment of the present invention.But, the present invention can be embodied in many different forms, however it is not limited to embodiment described herein.On the contrary, providing the purpose of these embodiments is to make to the disclosure more thoroughly comprehensively.
It should be noted that when element be referred to as " setting " at another element, it can be direct on another element or can also there is element placed in the middle.When an element is considered as " to be connected " with another element, and it can be directly to another element, or may be simultaneously present centering elements.
Unless otherwise defined, all of technology used herein is identical with the implication that the those skilled in the art belonging to the present invention are generally understood that with scientific terminology.The term used the most in the description of the invention is intended merely to describe the purpose of specific embodiment, it is not intended that in limiting the present invention.
Embodiment 1
Refer to Fig. 1 to Fig. 5, a kind of high-temperature flue gas and air switching cross valve include valve body, four openings, valve plate 37,
7, two big end caps 3 of main shaft, worm speed reducer 71, band brake fire-proof motor 73,75, two bearing portions of combination sealing brush, 15, four flanges 17 of four square tubes, gusset, two keyways 79, wired graphite packing 97, O RunddichtringO 95 and support 77.
Wherein, the sidewall of valve body is along the circumferential direction uniformly arranged four openings.Four square tubes 15 are separately positioned on valve body and a corresponding opening of square tube 15.Four flanges 17 are arranged in four square tubes 15 and a corresponding flange 17 of square tube 15.
Concrete, the top of valve body and bottom are respectively equipped with a big end cap 3, and big end cap 3 is provided with the shaft shoulder cooperated with valve body and hole (being not drawn into the shaft shoulder and hole in figure), and big end cap 3 is arranged on valve body by screw 19, the shaft shoulder and hole.A bearing portions it is designed with on each big end cap 3.Main shaft 7 is through the center of two big end caps 3 and two bearing portions and is arranged on two bearing portions.
Wherein, each bearing portions includes bearing 9, bearing block 91 and gland 93.Bearing block 91 is arranged on big end cap 3.
Bearing 9 is arranged on main shaft 7.Bearing 9 is fixed on bearing block 91 by gland 93.Main shaft 7 is arranged on two bearing blocks 91 through 3, two bearing blocks 91 of two big end caps and two glands 93.
Concrete, in order to prevent the leakage of flue gas or air, the junction of two big end caps 3 and main shaft 7 is provided with wired graphite packing 97.In order to ensure the sealing of bearing block 91, the junction of two glands 93 and main shaft 7 is provided with O RunddichtringO 95.
Wherein, the middle part of main shaft 7 is provided with valve plate 37, and valve plate 37 is arranged on main shaft 7 by the way of bolt or welding.The edge of valve plate 37 is provided with combination sealing brush 75 and combination sealing brush 75 inner surface respectively with the inner surface of valve body and big end cap 3 and fits, and have certain deflection, ensure in or rotation process static at valve plate, combination sealing brush 75 is fitted in inner surface and the inner surface of big end cap of valve body all the time, to cut off flue gas and air.
Concrete, combination sealing brush 75 uses high temperature alloy, has certain elasticity and intensity.
Concrete, for ensureing the intensity of valve plate 37, valve plate 37 is provided with gusset.The two ends of main shaft 7 are provided with keyway 79, the big end cap 3 that body base is arranged is provided with support 77, worm speed reducer 71 is arranged on support 77, and worm speed reducer 71 is connected with the bottom of main shaft 7, during i.e. worm speed reducer 71 output shaft end connecting hole is inserted in the bottom of main shaft 7.Worm speed reducer 71 is connected with band brake fire-proof motor 73.
Wherein, valve body is the columnar structured of three layers of hollow, and three layers from inside to outside are followed successively by inner core the 1, first ceramic fiber cotton layer 11 and urceolus 13.The sidewall of valve body is along the circumferential direction uniformly arranged four openings, and inner core 1 wall has certain circumferential distance between each opening, is the sealing area of the static work of valve plate 37, when i.e. valve plate 37 goes to sealing area, it is achieved flue gas and the partition completely of air.
Concrete, inner core 1 uses high temperature resistant stainless steel material manufacture, and through polish, combination sealing brush 75 and the inner surface gluing, sealing of inner core 1.When valve plate 37 rotates, combination sealing brush 75 and the inner surface of inner core 1 are fitted good all the time and wear and tear little, improve high-temperature flue gas and the sealing of air switching cross valve and service life.First ceramic fiber cotton layer 11 serves insulation and heat insulation effect.
Wherein, big end cap 3 is three layers, and three layers from inside to outside are followed successively by inwall the 31, second ceramic fiber cotton layer 33 and outer wall 35.Combination sealing brush 75 fits with the inner surface of inwall 31.
Concrete, four openings are respectively smoke inlet 51, exhanst gas outlet 53, air intake 55 and air outlet slit 57.Smoke inlet 51 is symmetrical arranged with air outlet slit 57, and exhanst gas outlet 53 is symmetrical arranged with air intake 55.
The operation principle of the present invention and work process thereof:
Smoke inlet 51 is connected with heating furnace chimney air flue, and air outlet slit 57 is connected with heating furnace hot-flow flue.The regenerator that exhanst gas outlet 53 is corresponding with preheater respectively with air intake 55 connects.During beginning, due on inner core 1 wall between each opening by certain circumferential distance, be the sealing area of the static work of valve plate 37, when i.e. valve plate 37 goes to sealing area, it is achieved the partition completely of flue gas and air.The most as shown in Figure 4, the left side is air intake 55, and the right is exhanst gas outlet 53, and the above is smoke inlet 51, and air outlet slit 57 is presented herein below.During commutation, main shaft 7 is driven to rotate by band brake fire-proof motor 73 and worm speed reducer 71, each commutation cycle main shaft 7 rotates 90 °, corresponding valve plate 37 also and then rotates 90 °, make the location swap of exhanst gas outlet 53 and air intake 55 switching direction, i.e. exhanst gas outlet 53 and air intake 55, as shown in Figure 5, the left side becomes exhanst gas outlet 53, and the right becomes air intake 55.In commutation at first, when valve plate 37 goes to the position of opening, there is connecting of short time in flue gas with air, causes the pressure in flue gas, air line, temperature momentary fluctuation, and therefore, when valve plate 37 switches, the rate request of switching is extremely short.In whole work process, valve plate 37 remains that one direction rotates, and rotates 90 °, it is to avoid combination sealing brush 75 moves back and forth, and is damaged by alternative cycle stress fatigue, extends service life every time.
Wherein, band brake fire-proof motor 73 by the control system that separately sets can drive valve plate 37 action accurately, complete 90 ° of angles of each cycle quick rotation, the most accurately stop at operating position.
Concrete, the present invention typically uses with low temperature side cross valve in the application in pairs, and four interfaces of low temperature side cross valve connect with cold air duct, cold smoke road and two corresponding regenerator respectively.During work, flue gas is switched successively in paired regenerator by low temperature side cross valve and high-temperature flue gas and air switching cross valve with air, to realize flue gas heat release and air absorbs heat this continuous print heat transfer process.
Advantages of the present invention and beneficial effect:
1, the present invention solves the flow direction switching of high-temperature flue gas and high temperature air, and valve plate 37 uses combination sealing brush 75 side of advanced person
Formula so that during cross valve work, internal leakage amount is reduced to reduced levels.
2, the present invention uses YE to make valve plate 37 one direction rotate, it is to avoid fatigue damage problem under combination sealing brush high temperature, corrosive conditions, extends cross valve service life and smooth running rate.
3, the present invention improves the thermal efficiency of whole regenerative air preheater system.
4, energy-conserving and environment-protective of the present invention.
Embodiment described above only have expressed one embodiment of the present invention, and it describes more concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that, for the person of ordinary skill of the art, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a high-temperature flue gas and air switching cross valve, it is characterised in that include valve body, four openings, valve plate, main shaft,
Two big end caps, worm speed reducer, band brake fire-proof motor, combination sealing brush, two bearing portions and support；
The sidewall of described valve body is along the circumferential direction uniformly arranged described four openings, the top of described valve body and bottom are respectively equipped with a described big end cap, it is designed with a described bearing portions on each described big end cap, described main shaft is through the center of two described big end caps and two described bearing portions and is arranged on described two bearing portions, the middle part of described main shaft is provided with described valve plate, the edge of described valve plate is provided with described combination sealing brush and the described combination sealing brush inner surface respectively with the inner surface of described valve body and big end cap and fits, the big end cap that described body base is arranged is provided with support, described worm speed reducer is connected with the bottom of described main shaft and is arranged on described support, described band brake fire-proof motor is connected with described worm speed reducer.
High-temperature flue gas the most according to claim 1 and air switching cross valve, it is characterised in that each described bearing portion
Divide and include bearing, bearing block and gland；
Described bearing block is arranged on described big end cap, described bearing is arranged on described main shaft, described bearing is fixed on described bearing block by described gland, and described main shaft is arranged on described two bearing blocks through two described big end caps, two described bearing blocks and two described glands.
High-temperature flue gas the most according to claim 1 and air switching cross valve, it is characterised in that described high-temperature flue gas and
Air switching cross valve also includes four square tubes and four flanges, described four square tubes are separately positioned on described valve body and a corresponding described opening of described square tube, and described four flanges are arranged in described four square tubes and a corresponding described flange of described square tube.
High-temperature flue gas the most according to claim 1 and air switching cross valve, it is characterised in that described high-temperature flue gas and
Air switching cross valve also includes that gusset, described gusset are arranged on described valve plate.
High-temperature flue gas the most according to claim 1 and air switching cross valve, it is characterised in that described high-temperature flue gas and
Air switching cross valve also includes that two keyways, described two keyways are separately positioned on the two ends of described main shaft.
High-temperature flue gas the most according to claim 1 and air switching cross valve, it is characterized in that, described high-temperature flue gas and air switching cross valve also include that wired graphite packing, described wired graphite packing are arranged on the junction of described two big end caps and described main shaft.
High-temperature flue gas the most according to claim 2 and air switching cross valve, it is characterised in that described high-temperature flue gas and air switching cross valve also include that O RunddichtringO, described O RunddichtringO are arranged on the junction of described two glands and described main shaft.
High-temperature flue gas the most according to claim 1 and air switching cross valve, it is characterised in that described valve body is three layers
Hollow columnar structured, three layers from inside to outside are followed successively by inner core, the first ceramic fiber cotton layer and urceolus, the inner surface laminating of described combination sealing brush and described inner core.
High-temperature flue gas the most according to claim 1 and air switching cross valve, it is characterised in that described big end cap is three
Layer, three layers from inside to outside are followed successively by inwall, the second ceramic fiber cotton layer and outer wall, and described combination sealing brush fits with the inner surface of described inwall.
High-temperature flue gas the most according to claim 1 and air switching cross valve, it is characterized in that, described four openings are respectively smoke inlet, exhanst gas outlet, air intake and air outlet slit, described smoke inlet is symmetrical arranged with described air outlet slit, and described exhanst gas outlet is symmetrical arranged with described air intake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610524902.4A CN105927759A (en) | 2016-07-06 | 2016-07-06 | Four-way valve used for high-temperature flue gas and air switching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610524902.4A CN105927759A (en) | 2016-07-06 | 2016-07-06 | Four-way valve used for high-temperature flue gas and air switching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105927759A true CN105927759A (en) | 2016-09-07 |
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ID=56827474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610524902.4A Pending CN105927759A (en) | 2016-07-06 | 2016-07-06 | Four-way valve used for high-temperature flue gas and air switching |
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| CN (1) | CN105927759A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120450A (en) * | 2017-05-08 | 2017-09-01 | 深圳市鸿效节能股份有限公司 | A kind of four-way valve and its heat accumulating type waste heat recovery system |
| CN110159799A (en) * | 2019-05-31 | 2019-08-23 | 岳阳恒盛石化科技有限公司 | A kind of nothing alters wind high-temperature flue gas and air switching four-way valve |
| CN110805721A (en) * | 2019-10-31 | 2020-02-18 | 安徽中泰创展环境科技股份有限公司 | Four-way valve for switching high-temperature flue gas |
| CN111232675A (en) * | 2020-03-25 | 2020-06-05 | 中粮工科茂盛装备(河南)有限公司 | Four-way type discharging device for belt conveyor |
| CN112843297A (en) * | 2021-01-06 | 2021-05-28 | 宁波方太厨具有限公司 | Layered disinfection cabinet |
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| US4982760A (en) * | 1988-10-31 | 1991-01-08 | Flotec, Inc. | Three-way valve with radial seal |
| CN2365474Y (en) * | 1999-01-18 | 2000-02-23 | 冶金工业部鞍山热能研究院 | Four-way change valve |
| EP1355095A2 (en) * | 2002-04-16 | 2003-10-22 | Traugott Albert | Four way mixing valve |
| CN2581769Y (en) * | 2002-11-07 | 2003-10-22 | 鞍山热能研究院 | Four-way reversing valve |
| CN101493154A (en) * | 2009-03-04 | 2009-07-29 | 中国科学院广州能源研究所 | Thermal storage burning four-way valve |
| CN204387399U (en) * | 2014-10-18 | 2015-06-10 | 浙江鸿森机械有限公司 | Apparatus of air conditioning four-way change-over valve |
| CN205859232U (en) * | 2016-07-06 | 2017-01-04 | 岳阳钟鼎热工电磁科技有限公司 | High-temperature flue gas and air switching cross valve |
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2016
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4982760A (en) * | 1988-10-31 | 1991-01-08 | Flotec, Inc. | Three-way valve with radial seal |
| CN2365474Y (en) * | 1999-01-18 | 2000-02-23 | 冶金工业部鞍山热能研究院 | Four-way change valve |
| EP1355095A2 (en) * | 2002-04-16 | 2003-10-22 | Traugott Albert | Four way mixing valve |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120450A (en) * | 2017-05-08 | 2017-09-01 | 深圳市鸿效节能股份有限公司 | A kind of four-way valve and its heat accumulating type waste heat recovery system |
| CN107120450B (en) * | 2017-05-08 | 2020-12-01 | 深圳市鸿效节能股份有限公司 | Heat accumulating type waste heat recovery system |
| CN110159799A (en) * | 2019-05-31 | 2019-08-23 | 岳阳恒盛石化科技有限公司 | A kind of nothing alters wind high-temperature flue gas and air switching four-way valve |
| CN110159799B (en) * | 2019-05-31 | 2024-07-30 | 岳阳恒盛石化科技有限公司 | Four-way valve for switching high-temperature flue gas and air without channeling |
| CN110805721A (en) * | 2019-10-31 | 2020-02-18 | 安徽中泰创展环境科技股份有限公司 | Four-way valve for switching high-temperature flue gas |
| CN111232675A (en) * | 2020-03-25 | 2020-06-05 | 中粮工科茂盛装备(河南)有限公司 | Four-way type discharging device for belt conveyor |
| CN112843297A (en) * | 2021-01-06 | 2021-05-28 | 宁波方太厨具有限公司 | Layered disinfection cabinet |
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