CN111649142A - Novel anti-blocking butterfly valve - Google Patents
Novel anti-blocking butterfly valve Download PDFInfo
- Publication number
- CN111649142A CN111649142A CN202010660361.4A CN202010660361A CN111649142A CN 111649142 A CN111649142 A CN 111649142A CN 202010660361 A CN202010660361 A CN 202010660361A CN 111649142 A CN111649142 A CN 111649142A
- Authority
- CN
- China
- Prior art keywords
- butterfly
- butterfly plate
- filter screen
- valve
- valve rod
- 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
- 238000007664 blowing Methods 0.000 claims abstract description 12
- 239000002002 slurry Substances 0.000 abstract description 19
- 238000011010 flushing procedure Methods 0.000 abstract description 15
- 239000007921 spray Substances 0.000 abstract description 13
- 239000012459 cleaning agent Substances 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract description 3
- 239000002893 slag Substances 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 description 11
- 239000007788 liquid Substances 0.000 description 7
- 239000013049 sediment Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
- B01D29/688—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles with backwash arms or shoes acting on the cake side
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
- B01D35/04—Plug, tap, or cock filters filtering elements mounted in or on a faucet
-
- 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
- F16K1/32—Details
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Water Supply & Treatment (AREA)
- Lift Valve (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention provides a novel anti-blocking butterfly valve which comprises a driving device, a back blowing device, a valve body, a valve rod and a butterfly plate, wherein the driving device, the back blowing device, the valve body, the valve rod and the butterfly plate are sequentially connected; the reverse blowing device is arranged between the driving device and the valve body, the butterfly plate is provided with a shaft sleeve, the valve rod penetrates through the reverse blowing device and the shaft sleeve and is connected with the driving device, and the butterfly plate is provided with a filter screen. The shaft sleeve is provided with a plurality of nozzles, the nozzles comprise a spray pipe and a spray pipe cover which are hinged through a hinge, and the spray pipe is provided with a magnet for closing the spray pipe cover. According to the invention, the filter screen is fixed on the butterfly plate, so that the slurry can be supported, large slurry solids are prevented from being accumulated on one side of the butterfly plate, the stress of the butterfly plate is prevented from being influenced, and the slag collection is realized; the butterfly valve is characterized in that the butterfly plate is provided with a plurality of nozzles, the nozzles can be used for back flushing or back flushing the slurry on the filter screen to remove the slurry on the filter screen, the valve rod is of a hollow structure and can be used for providing a channel for high-pressure gas or high-pressure cleaning agent, and the butterfly valve is compact in overall structure and convenient to install.
Description
Technical Field
The invention relates to the technical field of butterfly valve valves, in particular to a novel anti-blocking butterfly valve.
Background
A butterfly valve, also called a flap valve, is a regulating valve with simple structure, and can be used for the on-off control of low-pressure pipeline media, namely a valve which is opened and closed by rotating around a valve shaft, wherein a closing member (a valve clack or a butterfly plate) is a disk.
The valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like. The bottom of the filtering equipment is generally provided with a butterfly valve, and after the filtering equipment completes the filtering and separating task, the butterfly valve is opened to discharge solid impurities or slurry intercepted in the filtering equipment. At present, the butterfly valve that uses on filtration equipment is 90 reciprocal gyrations mostly, because the valve rod has protruding (axle sleeve) in the middle of the butterfly plate, when meetting the great or higher sediment thick liquids of water content of viscosity, has partly thick liquids to pile up in protruding one side, uses for a long time and can lead to one side of butterfly plate to be covered with thick liquids, and the opposite side then because thick liquids lean on self gravity whereabouts to keep clean, smooth when opening the valve at every turn. The butterfly plate is stressed unevenly for a long time, the sealing performance becomes worse and worse, and the butterfly valve cannot be used continuously.
In view of the above, there is a need for an improved butterfly valve in the prior art to solve the above problems.
Disclosure of Invention
The invention aims to disclose a novel anti-blocking butterfly valve, wherein a filter screen is fixed on a butterfly plate and used for filtering moisture in slurry and supporting the slurry, and a nozzle is arranged on a shaft sleeve in the center of the butterfly plate and used for back flushing the filter screen and cleaning the filter screen, so that the problem that the slurry is accumulated on the butterfly plate to influence the service life of the butterfly valve is avoided.
In order to achieve the purpose, the invention provides a novel anti-blocking butterfly valve which comprises a driving device, a back flushing device, a valve body, a valve rod and a butterfly plate, wherein the driving device, the back flushing device, the valve body, the valve rod and the butterfly plate are sequentially connected; the butterfly plate is provided with a shaft sleeve, the valve rod penetrates through the back blowing device and the shaft sleeve and is connected with the driving device, and the butterfly plate is provided with a filter screen.
In some embodiments, the valve rod is a hollow structure with two closed end faces, and the valve rod is provided with a plurality of small holes.
In some embodiments, a plurality of nozzles are arranged on the shaft sleeve parallel to the butterfly plate, and the nozzles are opposite to the small holes on the valve rod.
In some embodiments, the nozzle extends into the filter screen.
In some embodiments, the nozzle includes a spout and a spout cap hinged together, the spout being provided with a magnet located on a closure surface of the spout and the spout cap.
In some embodiments, the filter screen is fixed on a butterfly plate on one side of a shaft sleeve, and the vertex of the shaft sleeve is positioned on the extension surface of the upper surface of the filter screen.
In some embodiments, the blowback device comprises a bearing seat, a bearing matched with the bearing seat, and an air inlet pipe communicated with the bearing seat; the bearing is matched with the valve rod, the bearing seat is provided with a closed cavity, the air inlet pipe is communicated with the closed cavity, the valve rod is further provided with an air inlet hole, the air inlet hole is communicated with the closed cavity, and the two ends of the bearing seat are respectively provided with the bearing.
In some embodiments, the blow-back device is disposed intermediate the drive device and the valve body.
Compared with the prior art, the invention has the beneficial effects that: (1) the filter screen is fixed on the butterfly plate, so that the slurry can be supported, large slurry solids are prevented from being accumulated on one side of the butterfly plate, the stress of the butterfly plate is prevented from being influenced, and the slag collection is realized; (2) the butterfly plate is provided with a plurality of nozzles, and the back flushing or back flushing can be carried out on the slurry on the filter screen to remove the slurry on the filter screen; (3) each nozzle is provided with a hinged spray pipe cover, the spray pipe of each nozzle is also provided with a magnet for closing the spray pipe cover, and when the butterfly valve performs back flushing or back flushing, the spray pipe cover is opened by high-pressure gas or high-pressure cleaning agent to realize back flushing or back flushing; (4) the valve rod of the butterfly valve is of a hollow structure, can be used for providing a channel for high-pressure gas or high-pressure cleaning agent, and is compact in overall structure.
Drawings
FIG. 1 is a schematic view of an anti-blocking butterfly valve according to the present invention;
FIG. 2 is a schematic cross-sectional view of a butterfly plate according to the present invention;
FIG. 3 is a top view of the butterfly plate of the present invention;
FIG. 4 is a schematic view of a blowback apparatus according to the present invention;
FIG. 5 is a schematic view of a nozzle structure according to the present invention.
Description of reference numerals: 1. a hand wheel; 2. a drive device; 3. a back flushing device; 31. a bearing; 32. a bearing seat; 33. sealing the cavity; 4. an air inlet pipe; 5. a valve body; 6. a shaft sleeve; 7. a butterfly plate; 8. a filter screen; 9. a bolt; 10. a valve stem; 101. an air inlet; 11. a nozzle; 111. a nozzle; 112. a nozzle cap; 113. a magnet; 12. and (4) a hinge.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
As shown in fig. 1-5, a novel anti-blocking butterfly valve comprises a driving device 2, a valve body 5, a back-blowing device 3 arranged between the driving device 2 and the valve body 5, a valve rod 10 and a butterfly plate 7; the butterfly plate 7 is provided with a shaft sleeve 6 in the center, the valve rod 10 transversely penetrates through the back blowing device 3 and the shaft sleeve 6 and is connected with the driving device 2, the butterfly plate 7 is provided with a filter screen 8, and the filter screen 8 is arranged on one side, facing the slurry, of the butterfly plate 7.
In other embodiments, the blow-back device 3 may also be arranged at the bottom of the valve body 5.
The valve rod 10 is of a hollow structure with two closed end faces, and a plurality of small holes are formed in the valve rod 10. A plurality of nozzles 11 are arranged on the shaft sleeve 6 in parallel with the butterfly plate 7, the nozzles 11 are opposite to the small holes in the valve rod 10, and the nozzles 11 all extend into the filter screen 8.
The filter screen 8 is fixed on the butterfly plate 7 and located on one side of the shaft sleeve 6, and can also cover all the butterfly plates 7, the filter screen 8 only covers half of the butterfly plates 7, and the nozzle 11 and the filter screen 8 are located on the same side of the shaft sleeve 6.
The nozzle 11 comprises a spray tube 111 and a spray tube cover 112 which are hinged through a hinge 12, the spray tube 111 is provided with a magnet 113, and the magnet 113 is positioned on the closed surfaces of the spray tube 111 and the spray tube cover 112. The nozzle 11 of this embodiment is made of metal, and in other embodiments, the nozzle 11 may be made of nonmetal, and the corresponding magnets 113 are respectively disposed on the closing surfaces of the nozzle 111 and the nozzle cap 112 to provide a closing force for closing the nozzle cap 112.
As shown in fig. 2, the filter screen 8 is fixed on the butterfly plate 7 on one side of the shaft sleeve 6, and the vertex of the shaft sleeve 6 is positioned on the extending surface of the upper surface of the filter screen 8.
The blowback device 3 comprises a bearing seat 32, a bearing 31 matched with the bearing seat 32 and an air inlet pipe 4 communicated with the bearing seat 32; the bearing 31 is matched with the valve rod 10, the bearing seat 32 is provided with a closed cavity 33, the air inlet pipe 4 is communicated with the closed cavity 33, the valve rod 10 is further provided with an air inlet hole 101, the air inlet hole 101 is communicated with the closed cavity 33, and the two ends of the bearing seat 32 are respectively provided with the bearing 31.
When the butterfly valve is used specifically, the hand wheel 1 is rotated to drive the gear in the driving device 2 to rotate, and the valve rod 10 is driven to rotate through meshing of the gear, so that the butterfly plate 7 is driven to rotate around the valve rod 10 to open and close the butterfly valve. The driving device 2 is a manual device and is driven by the hand wheel 1, and in other embodiments, the driving device 2 can be designed to be in an electric mode, so that the hand wheel 1 is omitted.
In a typical filter or other purification apparatus, the side on which the filter screen 8 is disposed faces the inside of the filter or other purification apparatus, and meets slurry in the filter or other purification apparatus. The filtering precision of the filter screen 8 can be selected and matched according to the type and the particle size of the slurry, and the filtering precision range is generally 0.1 mm-20 mm.
When the butterfly valve is opened, the butterfly plate 7 rotates, and one side of the butterfly plate 7 provided with the filter screen 8 rotates towards the inside of the filter, and the other side rotates outwards. The butterfly plate 7 side that does not contain filter screen 8 is because the surface is smooth, and the sediment thick liquid leans on self gravity to follow the landing on the butterfly plate 7, contains 7 one sides of filter screen 8 because filter screen 8 supporting role, and bold sediment thick liquid also can follow the landing down on the filter screen 8, and the summit of axle sleeve 6 is located the extension face of filter screen 8, and axle sleeve 6 can not block the sediment thick liquid on the filter screen 8.
The slurry with smaller particles is slowly accumulated in the filter, high-pressure gas is introduced into the valve rod 10 through the back-blowing device 3, and the nozzle 11 sweeps the slurry in the filter screen 8 to remove the filter screen 8. The butterfly valve of this embodiment is normally positioned horizontally at the bottom of the strainer when in use, and when the butterfly plate 7 is rotated, the nozzle 11 is directed upward, and is normally closed because the nozzle 11 has the nozzle cover 112 disposed therein. The small particle slurry in the filter screen 8 can not enter the nozzle 11 to block the nozzle 11.
In other embodiments, the filtering net 8 may be a multi-layer structure, the filtering precision is gradient distribution, and the filtering net 8 is used to recycle the small particulate matters.
In other embodiments, the blowback device 3 may also be disposed at the bottom of the valve body 5 to achieve the same effect.
In this embodiment, the shaft sleeve 6 is fixed by the bolt 9 and the butterfly plate 7, the two ends of the shaft sleeve 6 are also provided with the bearing and the bearing seat, and a closed cavity is also formed inside the shaft sleeve 6, so that the back flushing device 3 can perform back flushing or back flushing on the filter screen 8.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. A novel anti-blocking butterfly valve is characterized by comprising a driving device, a back blowing device, a valve body, a valve rod and a butterfly plate which are sequentially connected; the butterfly plate is provided with a shaft sleeve, the valve rod penetrates through the back blowing device and the shaft sleeve and is connected with the driving device, and the butterfly plate is provided with a filter screen.
2. The novel anti-blocking butterfly valve according to claim 1, wherein the valve rod is a hollow structure with two closed end faces, and the valve rod is provided with a plurality of small holes.
3. The novel anti-blocking butterfly valve according to claim 2, wherein a plurality of nozzles are arranged on the shaft sleeve in parallel with the butterfly plate, and the nozzles are opposite to the small holes on the valve rod.
4. A novel anti-clogging butterfly valve according to claim 3, characterized in that said nozzle extends into the filter screen.
5. The novel anti-blocking butterfly valve according to claim 3, wherein the nozzle comprises a nozzle tube and a nozzle tube cover which are hinged, the nozzle tube is provided with a magnet, and the magnet is positioned on the closed surfaces of the nozzle tube and the nozzle tube cover.
6. The novel anti-blocking butterfly valve according to claim 1, wherein the filter screen is fixed to a butterfly plate on one side of the shaft sleeve, and the top of the shaft sleeve is located on an extending surface of the upper surface of the filter screen.
7. The novel anti-blocking butterfly valve according to claim 1, wherein the back-blowing device comprises a bearing seat, a bearing matched with the bearing seat, and an air inlet pipe communicated with the bearing seat; the bearing is matched with the valve rod, the bearing seat is provided with a closed cavity, the air inlet pipe is communicated with the closed cavity, the valve rod is further provided with an air inlet hole, the air inlet hole is communicated with the closed cavity, and the two ends of the bearing seat are respectively provided with the bearing.
8. The novel anti-blocking butterfly valve according to claim 1, wherein the back-blowing device is disposed between the driving device and the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010660361.4A CN111649142B (en) | 2020-07-10 | 2020-07-10 | Novel anti-blocking butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010660361.4A CN111649142B (en) | 2020-07-10 | 2020-07-10 | Novel anti-blocking butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111649142A true CN111649142A (en) | 2020-09-11 |
| CN111649142B CN111649142B (en) | 2024-08-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010660361.4A Active CN111649142B (en) | 2020-07-10 | 2020-07-10 | Novel anti-blocking butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111649142B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2386270Y (en) * | 1999-08-04 | 2000-07-05 | 张宗华 | Anticorrosive butterfly valve |
| US20080092848A1 (en) * | 2006-10-18 | 2008-04-24 | Aisan Kogyo Kabushiki Kaisha | Butterfly valves and intake air control devices for internal combustion engines |
| CN102996822A (en) * | 2012-10-22 | 2013-03-27 | 王洪娟 | Butterfly valve |
| CN205260863U (en) * | 2015-12-18 | 2016-05-25 | 安徽振海重工机械有限公司 | High sealed butterfly valve that shocks resistance |
| CN207848431U (en) * | 2017-11-23 | 2018-09-11 | 天津卡尔斯阀门股份有限公司 | A kind of filtering butterfly valve |
| CN210372041U (en) * | 2019-06-24 | 2020-04-21 | 泰州市龙瑞阀业有限公司 | Corrosion-resistant anti-blocking pipeline butterfly valve |
| CN210687024U (en) * | 2019-10-24 | 2020-06-05 | 浙江佰通防腐设备有限公司 | Take filtering capability's butterfly valve |
| CN111247320A (en) * | 2017-08-18 | 2020-06-05 | 康明斯有限公司 | Valve with a valve body |
| CN210770281U (en) * | 2019-08-12 | 2020-06-16 | 南安市丽迪家居用品有限公司 | Stainless steel butterfly valve with filtering and sterilizing functions |
| CN212509573U (en) * | 2020-07-10 | 2021-02-09 | 飞潮（无锡）过滤技术有限公司 | Novel anti-blocking butterfly valve |
-
2020
- 2020-07-10 CN CN202010660361.4A patent/CN111649142B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2386270Y (en) * | 1999-08-04 | 2000-07-05 | 张宗华 | Anticorrosive butterfly valve |
| US20080092848A1 (en) * | 2006-10-18 | 2008-04-24 | Aisan Kogyo Kabushiki Kaisha | Butterfly valves and intake air control devices for internal combustion engines |
| CN102996822A (en) * | 2012-10-22 | 2013-03-27 | 王洪娟 | Butterfly valve |
| CN205260863U (en) * | 2015-12-18 | 2016-05-25 | 安徽振海重工机械有限公司 | High sealed butterfly valve that shocks resistance |
| CN111247320A (en) * | 2017-08-18 | 2020-06-05 | 康明斯有限公司 | Valve with a valve body |
| CN207848431U (en) * | 2017-11-23 | 2018-09-11 | 天津卡尔斯阀门股份有限公司 | A kind of filtering butterfly valve |
| CN210372041U (en) * | 2019-06-24 | 2020-04-21 | 泰州市龙瑞阀业有限公司 | Corrosion-resistant anti-blocking pipeline butterfly valve |
| CN210770281U (en) * | 2019-08-12 | 2020-06-16 | 南安市丽迪家居用品有限公司 | Stainless steel butterfly valve with filtering and sterilizing functions |
| CN210687024U (en) * | 2019-10-24 | 2020-06-05 | 浙江佰通防腐设备有限公司 | Take filtering capability's butterfly valve |
| CN212509573U (en) * | 2020-07-10 | 2021-02-09 | 飞潮（无锡）过滤技术有限公司 | Novel anti-blocking butterfly valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111649142B (en) | 2024-08-16 |
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