CN108799518A - Rectangular butterfly valve - Google Patents
Rectangular butterfly valve Download PDFInfo
- Publication number
- CN108799518A CN108799518A CN201810997569.8A CN201810997569A CN108799518A CN 108799518 A CN108799518 A CN 108799518A CN 201810997569 A CN201810997569 A CN 201810997569A CN 108799518 A CN108799518 A CN 108799518A
- Authority
- CN
- China
- Prior art keywords
- connecting shaft
- blade
- butterfly valve
- valve
- rectangular butterfly
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims abstract description 35
- 238000009434 installation Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
- F16K1/2261—Shaping or arrangements of the sealing the sealing being arranged on the valve member
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/224—Details of bearings for the axis of rotation
-
- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
- F16K31/535—Mechanical actuating means with toothed gearing for rotating valves
-
- 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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0008—Mechanical means
- F16K37/0016—Mechanical means having a graduated scale
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a kind of rectangular butterfly valve, including valve body and the blade that is arranged in valve body, it is characterised in that：Seal member is equipped between the blade and valve interior wall；The blade includes blade body, and the end of the blade body has sealing extension；The seal member is equipped with one end open, the closed seal groove in one end, and the sealing extension is inserted from the open end of the seal groove to the seal groove.Blade and connecting shaft are sealed in valve body by the rectangular butterfly valve of the present invention, integrally formed seal member, and the sealing performance of rectangular butterfly valve is improved with this.
Description
Technical field
The present invention relates to a kind of butterfly valve structures, and in particular to a kind of rectangular butterfly valve.
Background technology
Rectangular butterfly valve is commonly used for a kind of valve body in process gases system, and currently used rectangular butterfly valve uses axis spiral shell
The mode that silk fastening is opened, there are some defects for this rectangular butterfly valve：1, it is bolted, is commonly used using axis between blade and axis
The materials of coaxial bolts be PTFE or titanium alloy bolt, the bolt of one side titanium alloy is of high cost, on the other hand this bolt
It is easily used to be catalyzed in acid or alkali environment, to influence the service life of valve；2, poor sealing.
Invention content
The technical problem to be solved in the present invention is to provide a kind of rectangular butterfly valves, improve the sealing performance of butterfly valve.
In order to solve the above technical problem, the present invention provides a kind of rectangular butterfly valves, including valve body and setting are in valve body
Blade, between the blade and valve interior wall be equipped with seal member；The blade includes blade body, the blade body
End has sealing extension；The seal member is equipped with one end open, the closed seal groove in one end, the sealing extension
It is inserted from the open end of the seal groove to the seal groove.
In a preferred embodiment of the present invention, further comprise that the seal member is located at the outside of seal groove equipped with extension
Contact site, the seal member are in sealing contact by extending contact site and the valve interior wall.
In a preferred embodiment of the present invention, further comprises the seal member and extend contact site integrated molding.
In a preferred embodiment of the present invention, further comprise that the cross section of the sealing extension is " V " character form structure,
The seal groove is the profiling slot structure to match with sealing extension contour structures.
In a preferred embodiment of the present invention, further comprise the opening side of two described sealing extension " V " character form structures
To opposite.
In a preferred embodiment of the present invention, further comprise being fixed with connecting shaft on the valve body, the blade passes through
Connecting shaft is mounted on the valve inner；The connecting shaft has the connecting shaft one and connecting shaft two of split settings, the blade
Nesting is fixed in connecting shaft one and connecting shaft two respectively at the both ends being oppositely arranged.
In a preferred embodiment of the present invention, further comprise that the both ends that the blade body is oppositely arranged are equipped with nesting
The junction of slot, the blade body and nested troughs is respectively formed the first clamping portion and the second clamping portion；One edge of the connecting shaft
Its radial both sides is respectively equipped with the first card slot and the second card slot, and first card slot and the second card slot are along the axis of connecting shaft one
To extension；The end of the connecting shaft one is inserted into nested troughs and first clamping portion and the second clamping portion are not caught in the
In one card slot and the second card slot；
Both the connecting shaft one and connecting shaft two are identical as the fixed form of the blade.
In a preferred embodiment of the present invention, further comprise that it further includes the driving mechanism rotated for driving blade,
The driving mechanism is connected in the connecting shaft one or connecting shaft two；The driving mechanism include the turbine that is rotatably assorted and
Worm screw, the turbine are mounted in connecting shaft one or connecting shaft two.
In a preferred embodiment of the present invention, further comprise that the free end of the worm screw is equipped with power source.
In a preferred embodiment of the present invention, further comprise that the lateral wall of the valve body is equipped with the installation that can be dismantled
Box, the mounting box is for accommodating the turbine and worm screw comprising cross section is first mounting blocks of " ∩ " font structure
With the second mounting blocks.
In a preferred embodiment of the present invention, further comprise that being arranged with band in the connecting shaft one or connecting shaft two refers to
The angle scale of needle.
Blade and connecting shaft are sealed in valve body by the rectangular butterfly valve of the present invention, integrally formed seal member, are come with this
Improve the sealing performance of rectangular butterfly valve.
Description of the drawings
Fig. 1 is the structural schematic diagram of rectangular butterfly valve in the preferred embodiment of the present invention；
Fig. 2 is the structural schematic diagram of rectangular butterfly valve after concealing mounting box in the preferred embodiment of the present invention；
Fig. 3 is the sealing fit structure schematic diagram of seal member and blade in the preferred embodiment of the present invention；
Fig. 4 is connecting shaft fixed structure schematic diagram nested with blade in the preferred embodiment of the present invention.
Wherein：2- valve bodies, 4- blades, 6- seal members, 8- blade bodies, 10- seal extension, 12- seal grooves, 14-
Extend contact site, 16- connecting shafts one, 18- connecting shafts two, 20- nested troughs, the first clampings of 22- portion, the second clampings of 24- portion, 26-
First card slot, the second card slots of 28-, 30- turbines, 32- worm screws, 34- handwheels, the first mounting blocks of 36-, the second mounting blocks of 38-, 40-
Angle scale.
Specific implementation mode
The invention will be further described in the following with reference to the drawings and specific embodiments, so that those skilled in the art can be with
It more fully understands the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
Embodiment
As shown in Figs 1-4, present embodiment discloses a kind of rectangular butterfly valves, including the valve body 2 of square structure and setting are in valve
Blade 4 in body 2 is equipped with seal member 6 between 2 inner wall of above-mentioned blade 4 and valve body；It is above-mentioned close in the present embodiment technical solution
Sealing component 6, it is preferable to use integrally formed rubber weather strips.Above-mentioned blade 4 includes blade body 8, the end of above-mentioned blade body 8
Portion has sealing extension 10；Above-mentioned seal member 6 is equipped with one end open, the closed seal groove 12 in one end, and above-mentioned sealing is prolonged
Extending portion 10 is inserted from the open end of above-mentioned seal groove 12 to above-mentioned seal groove 12.
As shown in figure 3, corresponding to the valve body 2 of square structure, the blade 4 in the present embodiment technical solution also has rectangular knot
Structure, for the tool of blade 4 there are four end (being respectively the four edges of blade 4), four ends of corresponding blade 4 have structure identical four
A seal member 6, certain four seal members 6 can be connected as the entirety of a loop configuration, can also respectively be independently arranged,
It is equipped with seal groove 12 on four seal members 6；Four ends of blade 4 are correspondingly configured with sealing extension 10, and four close
It seals in the corresponding inserting to four seal grooves 12 of extension 10, by sealing entire leaf in the inserting to seal groove 12 of extension 10
Piece 4 is sealingly disposed in valve body 2, and the sealing performance of rectangular butterfly valve is improved with this.
As a further improvement on the present invention, in order to reduce the use of seal member 6, above-mentioned sealing extension 10 it is transversal
Face is " V " character form structure, and above-mentioned seal groove 12 is the profiling slot structure to match with sealing 10 contour structures of extension；Specifically
, the cross section of seal member 6 is " V " character form structure, the cross section of the seal groove 12 inside opened up also not " V " character form structure,
To further increase the sealing performance of rectangular butterfly valve in sealing extension 10 inserting to seal groove 12 of this special construction design, make
It obtains and only needs the opposite sides in blade 4 that seal member 6 is set, the sealing extension 10 compared to other structures and sealing
Slot 12 can reduce two seal members 6, and the use of seal member 6 can be reduced while not influencing sealing performance, reduce butterfly
The manufacturing cost of valve.
Further, above-mentioned seal member 6 is located at the outside of seal groove 12 equipped with extension contact site 14, above-mentioned seal member
6 are integrally formed with contact site 14 is extended, and above-mentioned seal member 6 is contacted by extending contact site 14 with 2 inner wall sealing of above-mentioned valve body.
The sealing performance of butterfly valve can be further increased by extending contact site 14.
The open direction of two above-mentioned sealing extension 10 " V " character form structures is opposite.
As a further improvement on the present invention, connecting shaft is fixed on above-mentioned valve body 2, above-mentioned blade 4 is pacified by connecting shaft
Inside above-mentioned valve body 2；Above-mentioned connecting shaft has the connecting shaft 1 and connecting shaft 2 18 of split settings, 4 phase of above-mentioned blade
To the both ends of setting, nesting is fixed in connecting shaft 1 and connecting shaft 2 18 respectively.Traditional rectangular butterfly valve, 4 use of blade are passed through
It wears the whole axis of blade 4 to be fixed in valve body 2, and uses screw close-fitting between blade 4 and axis.The present embodiment technical solution
In, the fixed form of the axis structure and blade 4 and axis of abandoning tradition, connecting shaft has split settings, is respectively used to and leaf
The fixed connecting shaft 1 in 4 both ends of piece and connecting shaft 2 18, and using embedding between blade 4 and connecting shaft 1 and connecting shaft 2 18
Set mode is fixed, and the bolt of abandoning tradition either fix in 2 the inside of valve body without a bolt or screw by screw, is come with this
Solve the problems, such as that bolt catalysis and processing cost are high.Its specific nested fixed realization structure is as follows：
As shown in figure 4, the both ends that above-mentioned blade body 8 is oppositely arranged are equipped with nested troughs 20, above-mentioned blade body 8 with it is embedding
The junction of grooving 20 is respectively formed the first clamping portion 22 and the second clamping portion 24；The both sides of above-mentioned connecting shaft 1 radially
It is respectively equipped with the first card slot 26 and the second card slot 28,26 and second card slot 28 of above-mentioned first card slot is along the axial direction of connecting shaft 1
Extend；The end of above-mentioned connecting shaft 1 is inserted into nested troughs 20 and above-mentioned first clamping portion 22 and the second clamping portion 24 are distinguished
It is caught in the first card slot 26 and the second card slot 28；It realizes that connecting shaft 1 is mutually nested with blade body 8 with this to be fixed together,
Any external fitted component need not be used.
Nested fixed form between connecting shaft 2 18 and blade body 8 is identical as connecting shaft 1, concrete structure and
Details are not described herein again for realization method.
Above-mentioned rectangular butterfly valve further includes the driving mechanism rotated for driving blade 4, as shown in Fig. 2, above-mentioned driving mechanism
It is connected in above-mentioned connecting shaft 1 or connecting shaft 2 18；Above-mentioned driving mechanism includes the turbine 30 being rotatably assorted and worm screw
32, above-mentioned turbine 30 is mounted in connecting shaft 1 or connecting shaft 2 18, and the free end of above-mentioned worm screw 32 is equipped with power source, moves
Power source can be can also be motor-driven electronic manually.It is rotated and is adjusted using worm and gear driving mechanism driving blade 4
The aperture of whole butterfly valve, worm and gear driving mechanism use more effortless convenience.
The lateral wall of above-mentioned valve body 2 is equipped with the mounting box that can be dismantled, and above-mentioned mounting box is for accommodating 30 He of above-mentioned turbine
Worm screw 32 comprising cross section is first mounting blocks 36 and the second mounting blocks 38 of " ∩ ".
The angle scale 40 with pointer is arranged in above-mentioned connecting shaft 1 or connecting shaft 2 18.In connecting shaft rotation process
It drives pointer to be rotated on angle scale 40, the angle of rotation can be intuitively checked by the angle on angle scale 40.
Embodiment described above is only to absolutely prove preferred embodiment that is of the invention and being lifted, protection model of the invention
It encloses without being limited thereto.Those skilled in the art on the basis of the present invention made by equivalent substitute or transformation, in the present invention
Protection domain within.Protection scope of the present invention is subject to claims.
Claims (10)
1. a kind of rectangular butterfly valve, including valve body and the blade that is arranged in valve body, it is characterised in that：The blade and valve interior wall
Between be equipped with seal member；The blade includes blade body, and the end of the blade body has sealing extension；It is described close
It seals component and is equipped with one end open, the closed seal groove in one end, the sealing extension is inserted from the open end of the seal groove
In to the seal groove.
2. rectangular butterfly valve as described in claim 1, it is characterised in that：The seal member be located at seal groove outside be equipped with prolong
Contact site is stretched, the seal member is in sealing contact by extending contact site and the valve interior wall.
3. rectangular butterfly valve as claimed in claim 2, it is characterised in that：The seal member and extension contact site are integrally formed.
4. rectangular butterfly valve as described in claim 1, it is characterised in that：The cross section of the sealing extension is " V " font knot
Structure, the seal groove are the profiling slot structure to match with sealing extension contour structures；Two sealing extension " V " fonts
The open direction of structure is opposite.
5. rectangular butterfly valve as described in claim 1, it is characterised in that：Connecting shaft is fixed on the valve body, the blade is logical
It crosses connecting shaft and is mounted on the valve inner；The connecting shaft has the connecting shaft one and connecting shaft two of split settings, the leaf
Nesting is fixed in connecting shaft one and connecting shaft two respectively at the both ends that piece is oppositely arranged.
6. rectangular butterfly valve as claimed in claim 5, it is characterised in that：The both ends that the blade body is oppositely arranged are equipped with embedding
The junction of grooving, the blade body and nested troughs is respectively formed the first clamping portion and the second clamping portion；The connecting shaft one
Both sides radially are respectively equipped with the first card slot and the second card slot, and first card slot and the second card slot are along connecting shaft one
It is axially extending；The end of the connecting shaft one is inserted into nested troughs and first clamping portion and the second clamping portion are not caught in
In first card slot and the second card slot；
Both the connecting shaft one and connecting shaft two are identical as the fixed form of the blade.
7. rectangular butterfly valve as claimed in claim 5, it is characterised in that：It further includes the driving machine rotated for driving blade
Structure, the driving mechanism are connected in the connecting shaft one or connecting shaft two；The driving mechanism includes the whirlpool being rotatably assorted
Wheel and worm screw, the turbine are mounted in connecting shaft one or connecting shaft two.
8. rectangular butterfly valve as claimed in claim 7, it is characterised in that：The free end of the worm screw is equipped with power source.
9. rectangular butterfly valve as claimed in claim 7, it is characterised in that：The lateral wall of the valve body is equipped with the installation that can be dismantled
Box, the mounting box is for accommodating the turbine and worm screw comprising cross section is first mounting blocks of " ∩ " character form structure
With the second mounting blocks.
10. rectangular butterfly valve as claimed in claim 5, it is characterised in that：It is arranged in the connecting shaft one or connecting shaft two
Angle scale with pointer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810997569.8A CN108799518B (en) | 2018-08-29 | Square butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810997569.8A CN108799518B (en) | 2018-08-29 | Square butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108799518A true CN108799518A (en) | 2018-11-13 |
| CN108799518B CN108799518B (en) | 2024-07-02 |
Family
ID=
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113915352A (en) * | 2020-07-07 | 2022-01-11 | 约克广州空调冷冻设备有限公司 | Air valve |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4193605A (en) * | 1978-05-05 | 1980-03-18 | American Hardware & Paint Co., Inc. | Seal for damper blades |
| US5081972A (en) * | 1990-02-16 | 1992-01-21 | Siemens Automotive L.P. | Engine throttle blade sealing |
| DE4423370A1 (en) * | 1994-07-04 | 1996-01-11 | Bayerische Motoren Werke Ag | Throttle flap socket for IC engines |
| DE19512875A1 (en) * | 1995-04-06 | 1996-10-10 | Vdo Schindling | Throttle valve connection for regulating intake air of vehicle Otto engine |
| US5669350A (en) * | 1993-09-02 | 1997-09-23 | Filterwerk Mann & Hummel Gmbh | Throttle device |
| DE19652169A1 (en) * | 1996-12-14 | 1998-06-18 | Glatt Systemtechnik Dresden | Sealing device for containers or pipes with coupling mechanisms |
| CN102287272A (en) * | 2010-06-17 | 2011-12-21 | 爱信精机株式会社 | Fluid control valve |
| CN103953739A (en) * | 2014-05-06 | 2014-07-30 | 刘磊 | Inner locked air valve device |
| CN205534279U (en) * | 2016-04-09 | 2016-08-31 | 浙江四通阀门制造有限公司 | Dismouting structure of butterfly plate and valve rod and have butterfly valve of this structure |
| CN107120441A (en) * | 2017-06-20 | 2017-09-01 | 盐城市星火阀业制造股份有限公司 | It is a kind of flexibly to change the butterfly valve shell structure of turnover panel |
| CN208719382U (en) * | 2018-08-29 | 2019-04-09 | 致和环境科技（江苏）有限公司 | Rectangular butterfly valve |
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4193605A (en) * | 1978-05-05 | 1980-03-18 | American Hardware & Paint Co., Inc. | Seal for damper blades |
| US5081972A (en) * | 1990-02-16 | 1992-01-21 | Siemens Automotive L.P. | Engine throttle blade sealing |
| US5669350A (en) * | 1993-09-02 | 1997-09-23 | Filterwerk Mann & Hummel Gmbh | Throttle device |
| DE4423370A1 (en) * | 1994-07-04 | 1996-01-11 | Bayerische Motoren Werke Ag | Throttle flap socket for IC engines |
| DE19512875A1 (en) * | 1995-04-06 | 1996-10-10 | Vdo Schindling | Throttle valve connection for regulating intake air of vehicle Otto engine |
| DE19652169A1 (en) * | 1996-12-14 | 1998-06-18 | Glatt Systemtechnik Dresden | Sealing device for containers or pipes with coupling mechanisms |
| CN102287272A (en) * | 2010-06-17 | 2011-12-21 | 爱信精机株式会社 | Fluid control valve |
| CN103953739A (en) * | 2014-05-06 | 2014-07-30 | 刘磊 | Inner locked air valve device |
| CN205534279U (en) * | 2016-04-09 | 2016-08-31 | 浙江四通阀门制造有限公司 | Dismouting structure of butterfly plate and valve rod and have butterfly valve of this structure |
| CN107120441A (en) * | 2017-06-20 | 2017-09-01 | 盐城市星火阀业制造股份有限公司 | It is a kind of flexibly to change the butterfly valve shell structure of turnover panel |
| CN208719382U (en) * | 2018-08-29 | 2019-04-09 | 致和环境科技（江苏）有限公司 | Rectangular butterfly valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113915352A (en) * | 2020-07-07 | 2022-01-11 | 约克广州空调冷冻设备有限公司 | Air valve |
| CN113915352B (en) * | 2020-07-07 | 2023-04-11 | 约克广州空调冷冻设备有限公司 | Air valve |
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