CN110420959A - It is a kind of accurately to control blanking and dust is without the dust collection cover flown upward - Google Patents
It is a kind of accurately to control blanking and dust is without the dust collection cover flown upward Download PDFInfo
- Publication number
- CN110420959A CN110420959A CN201910771108.3A CN201910771108A CN110420959A CN 110420959 A CN110420959 A CN 110420959A CN 201910771108 A CN201910771108 A CN 201910771108A CN 110420959 A CN110420959 A CN 110420959A
- Authority
- CN
- China
- Prior art keywords
- turnover panel
- dust
- connecting rod
- shaft
- cover
- 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
Links
- 239000000428 dust Substances 0.000 title claims abstract description 38
- 230000007306 turnover Effects 0.000 claims abstract description 52
- 238000009423 ventilation Methods 0.000 claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 abstract description 27
- 239000000463 material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000013329 compounding Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000012372 quality testing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000010057 rubber processing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/22—Component parts, details or accessories; Auxiliary operations
- B29B7/24—Component parts, details or accessories; Auxiliary operations for feeding
- B29B7/242—Component parts, details or accessories; Auxiliary operations for feeding in measured doses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/22—Component parts, details or accessories; Auxiliary operations
- B29B7/28—Component parts, details or accessories; Auxiliary operations for measuring, controlling or regulating, e.g. viscosity control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
- B29B7/60—Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
- B29B7/72—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Blanking can be accurately controlled the present invention relates to one kind and dust is without the dust collection cover flown upward, including cover, flap valve, rotary valve.Cover includes fixed link, ventilation duct, volume damper, feed pipe, dust-collecting pipe, ventilator cowling.Flap valve includes turnover panel air cylinder, turnover panel air cylinder support, turnover panel connecting rod, bearing block, rotating plate shaft, turnover panel.Rotary valve includes turntable, shaft, rotary cylinder support, rotary cylinder, connecting rod.The ventilation duct of falling Y-shaped and volume damper being arranged improve the exhausting uniformity of cover surrounding during blanking weighs.90 ° of the achievable vertical direction of the flap valve overturnings on cover meet the unlatching and the rapid closing after weighing of feed opening when feeding machine blanking weighs, ensure that weighing accuracy.90 ° of the achievable horizontal direction of the rotary valve being arranged on cover rotations, meet the rapid precession of turntable at the end of the back-out and weighing of turntable when weighing to feeding machine blanking, it avoids dust whereabouts to fly upward, ensure that environment is clean and tidy and the steady operation of automatic weighing pipeline.
Description
Technical field
The present invention relates to ventilating dust-removing technology fields, and in particular to one kind can accurately control blanking and dust is without flying upward
Dust collection cover.
Background technique
Refining glue is the most important production process of rubber processing, is extremely closed to the quality of the processing and forming of subsequent rubber product
It is important.The general technology process of refining glue preparation are as follows: raw rubber and compounding agent are weighed, are kneaded, quality testing.Claim in raw rubber and compounding agent
When amount, it is desirable that quickly, it is accurate, do not leak, environmental protection.But the weighing of raw rubber and compounding agent, especially matches in actual production process
The weighing of mixture is difficult to meet the requirements, and has directly influenced the quality of mixing rubber.Because most compounding agents are powder, continuously certainly
Dynamicization weighs in blending process, often will appear weighing deviation in feeding machine feed opening and splicing basket position and dust from flying is existing
As dust is trickled down on following automatic weighing pipeline, and weighing accuracy is affected, and polluted workshop condition, or even influence
The normal work of a full set of automatic weighing pipeline, increases maintenance and repair workload.Now propose that one kind can accurately control blanking
And dust is without the dust collection cover flown upward, including cover, flap valve, rotary valve.The ventilation duct of falling Y-shaped and volume damper can be improved
The exhausting uniformity of cover surrounding during blanking weighs.90 ° of the achievable vertical direction of the flap valve overturnings on cover, can keep away
Exempt from have the phenomenon that material is fallen inside feed inlet, guarantees weighing accuracy.90 ° of the achievable horizontal direction of the rotary valve rotations on cover
Turn, ventilator cowling inner wall is avoided to have material to fall on the phenomenon on automatic weighing conveying equipment, guarantee that environment is clean and tidy, ensures that a full set is automatic and claim
Measure the steady operation of pipeline.
Summary of the invention
It is an object of the present invention to guarantee precise and avoid dust from flying, blanking and powder can accurately be controlled by providing one kind
Dirt can be improved the exhausting uniformity of cover surrounding during blanking weighs, avoid having inside feed inlet without the dust collection cover flown upward
Material is fallen has material to fall on the phenomenon on automatic weighing conveying equipment with ventilator cowling inner wall, to guarantee weighing accuracy, avoids dust
It flies upward, guarantees that environment is clean and tidy and the steady operation of automatic weighing pipeline.
To realize the purpose, the present invention adopts the following technical scheme: one kind can accurately control blanking and dust is without flying upward
Dust collection cover, including cover, flap valve, rotary valve, the cover include fixed link, ventilation duct, volume damper, feed pipe,
Dust-collecting pipe, ventilator cowling, the flap valve include turnover panel air cylinder, turnover panel air cylinder support, turnover panel connecting rod, bearing block, rotating plate shaft, turn over
Plate, the rotary valve include turntable, shaft, rotary cylinder support, rotary cylinder, connecting rod.
Further, ventilator cowling is rectangular, is surrounded by rib, the tapping of fixed link both ends, one end of 4 fixed links respectively with
The quadrangle of ventilator cowling is secured with nuts, and the other end is secured in rack with nut.
Further, the centre on ventilator cowling top taps into expects pipe, has flanked 2 dust-collecting pipes in the neighbour of feed pipe, has gathered dust
Pipe top is connected to volume damper and ventilation duct, and ventilation duct is the tee pipe fitting of falling Y-shaped, 2 branch pipes and air quantity tune of ventilation duct
Save valve connection.
Further, turnover panel and rotating plate shaft weld, and the both ends spindle nose of rotating plate shaft passes through bearing block, turnover panel connecting rod one end and turnover panel
One end spindle nose of axis is connected by flat key, and the other end and turnover panel air cylinder piston rod head are hinged, and turnover panel air cylinder passes through connection bolt
It is fixed on turnover panel air cylinder support, turnover panel air cylinder support is welded on ventilator cowling side, and the piston rod of turnover panel air cylinder is flexible by turning over
Plate connecting rod driving rotating plate shaft and turnover panel are rotated by 90 °.
Further, the steel plate bolt that turntable and shaft lower end are welded is affixed, and the upper end of shaft and connecting rod pass through flat key company
It connects, connecting rod and rotary cylinder piston head are hinged, and rotary cylinder is fixed on rotary cylinder support, and rotary cylinder support is fixed on logical
The side of fan housing, the piston rod of rotary cylinder is flexible to be rotated by connecting rod drive shaft, and shaft drives the rotation of turntable horizontal direction
90°。
After technical solutions according to the invention, bring it is following the utility model has the advantages that
One kind of the present invention can accurately control blanking and dust is without the dust collection cover flown upward, can be weighed with raising blanking
The exhausting uniformity of cover surrounding in the process, avoiding inside feed inlet has material to fall has material to fall on automatic title with ventilator cowling inner wall
The phenomenon on conveying equipment is measured, weighing accuracy is ensure that, avoids dust from flying, ensure that environment is clean and tidy and automatic weighing conveys
The steady operation of line.
Detailed description of the invention
Fig. 1: structural schematic diagram of the invention；
Top view when Fig. 2: Fig. 1 turntable removes；
Fig. 3: Fig. 1 lateral view.
Wherein: 1, fixed link, 2, ventilation duct, 3, volume damper, 4, feed pipe, 5, dust-collecting pipe, 6, ventilator cowling, 7, turnover panel
Cylinder, 8, turnover panel air cylinder support, 9, turnover panel connecting rod, 10, bearing block, 11, rotating plate shaft, 12, turnover panel, 13, turntable, 14, shaft,
15, rotary cylinder support, 16, rotary cylinder, 17, connecting rod.
Specific embodiment
A specific embodiment of the invention is described in further detail with reference to the accompanying drawing.
It is a kind of accurately to control blanking and dust is without the dust collection cover flown upward, including cover in conjunction with shown in Fig. 1, Fig. 2 and Fig. 3
Body, flap valve, rotary valve, the cover include fixed link 1, ventilation duct 2, volume damper 3, feed pipe 4, dust-collecting pipe 5, ventilation
Cover 6, the flap valve include turnover panel air cylinder 7, turnover panel air cylinder support 8, turnover panel connecting rod 9, bearing block 10, rotating plate shaft 11, turnover panel 12,
The rotary valve includes turntable 13, shaft 14, rotary cylinder support 15, rotary cylinder 16, connecting rod 17.Ventilator cowling 6 be it is rectangular, four
Week is equipped with rib, and 1 both ends tapping of fixed link, quadrangle of the one end of 4 fixed links 1 respectively with ventilator cowling 6 is secured with nuts, another
End is secured in rack with nut.The centre on 6 top of ventilator cowling taps into expects pipe 4, has flanked 2 receipts in the neighbour of feed pipe 4
Dirt pipe 5,5 top of dust-collecting pipe are connected to volume damper 3 and ventilation duct 2, and ventilation duct 2 is the tee pipe fitting of falling Y-shaped, and the 2 of ventilation duct 2
A branch pipe is connect with volume damper 3.Turnover panel 12 and rotating plate shaft 11 weld, and the both ends spindle nose of rotating plate shaft 11 passes through bearing block 8, turn over
9 one end of plate connecting rod is connect with one end spindle nose of rotating plate shaft 11 by flat key, and the other end and 7 piston rod head of turnover panel air cylinder are hinged,
Turnover panel air cylinder 7 is fixed on turnover panel air cylinder support 8 by connecting bolt, and turnover panel air cylinder support 8 is welded on 6 side of ventilator cowling, turns over
The piston rod of plate cylinder 7 is flexible to drive rotating plate shaft 11 and turnover panel 12 to be rotated by 90 ° by turnover panel connecting rod 9.Under turntable 13 and shaft 14
Hold the steel plate bolt of welding affixed, the upper end of shaft 14 is connect with connecting rod 17 by flat key, and connecting rod 17 and rotary cylinder 16 are living
Chock plug is hinged, and rotary cylinder 16 is fixed on rotary cylinder support 15, and rotary cylinder support 15 is fixed on the side of ventilator cowling 6,
The piston rod of rotary cylinder 16 is flexible to be rotated by 17 drive shaft 14 of connecting rod, and shaft 14 drives the rotation of 13 horizontal direction of turntable
90°。
In conjunction with shown in Fig. 1, Fig. 2 and Fig. 3, work starts, automatic weighing pipeline by splicing basket send to ventilator cowling 6 just under
After the weighing station of side, the piston rod of rotary cylinder 16 stretches out, and drives shaft 14 to be rotated by 90 ° by connecting rod 17, shaft 14 drives
Turntable 13 is horizontal to be screwed out, and the piston rod of subsequent turnover panel air cylinder 7 stretches out, and is driven rotating plate shaft 11 to overturn by turnover panel connecting rod 9, is made to weld
90 ° are downwardly turned in the turnover panel 12 of rotating plate shaft 11, feed pipe 4 is open-minded.At this time feeding machine start automatically by 4 blanking of feed pipe into
Enter splicing basket to be weighed, while blanking weighs, 2 dust-collecting pipes 5 of 4 two sides of feed pipe start to collect the powder that blanking generates
Dirt, dusty gas is discharged upwards after importing ventilation duct 2 by respective volume damper 3, according to dust from flying in ventilation process
Degree adjust 3 air volume of volume damper.When the powder in splicing basket reaches pre-set weight, turnover panel gas
The piston rod of cylinder 7 is shunk, and drives rotating plate shaft 11 to overturn by turnover panel connecting rod 9, makes the turnover panel for being welded on rotating plate shaft 11 12 to turning over
Turn 90 ° of resets, feed pipe 4 is closed, and the powder for avoiding 4 inner wall of feed pipe from adhering to continues the phenomenon that falling.Then rotary cylinder 16
Piston rod shrink, by connecting rod 17 drive shaft 14 reversely rotate 90 °, shaft 14 drive 13 horizontal direction of turntable rotate rapidly
It resets, splicing basket is removed along automatic weighing pipeline, and next splicing basket moves to weighing station along automatic weighing pipeline, is repeated
Above-mentioned movement can endlessly convey the splicing basket of accurate dosing to pipeline.2 dust-collecting pipes and rotating plate shaft 11 distinguish position
In the two sides of feed pipe 4, the pumping of cover surrounding during blanking weighs is improved by the ventilation duct 2 of setting, volume damper 3
Wind uniformity, 90 ° of the achievable vertical direction of the flap valve being arranged on cover overturnings meet blanking when feeding machine blanking weighs
Rapid closing after the unlatching and weighing of mouth, the rotary valve being arranged on cover can complete 90 ° of horizontal direction rotations, full
When foot weighs feeding machine blanking at the end of the back-out and weighing of turntable 13 turntable 13 rapid precession, turntable 13 can pick up
It is attached to the dust fallen on 6 inner wall of ventilator cowling, the dust timing picked up on turntable 13 is cleared up.To both ensure that weighing essence
Degree, in turn avoids dust from flying, ensure that environment is clean and tidy, ensured the steady operation of automatic weighing pipeline.
The foregoing is merely the preferred embodiment of the present invention, it is noted that for those of ordinary skill in the art and
Speech, without departing from the principles of the present invention, can also make various deformation and improvement, this also should be considered as protection of the invention
Range.
Claims (5)
1. one kind can accurately control blanking and dust is without the dust collection cover flown upward, it is characterised in that: including cover, flap valve, rotation
Rotary valve, the cover include fixed link (1), ventilation duct (2), volume damper (3), feed pipe (4), dust-collecting pipe (5), ventilator cowling
(6), the flap valve includes turnover panel air cylinder (7), turnover panel air cylinder support (8), turnover panel connecting rod (9), bearing block (10), rotating plate shaft
(11), turnover panel (12), the rotary valve include turntable (13), shaft (14), rotary cylinder support (15), rotary cylinder (16),
Connecting rod (17).
2. one kind according to claim 1 can accurately control blanking and dust is without the dust collection cover flown upward, feature exists
Be in: the ventilator cowling (6) it is rectangular, be surrounded by rib, fixed link (1) the both ends tapping, one end of 4 fixed links (1)
The quadrangle with ventilator cowling (6) is secured with nuts respectively, and the other end is secured in rack with nut.
3. one kind according to claim 1 can accurately control blanking and dust is without the dust collection cover flown upward, feature exists
In: the centre on ventilator cowling (6) top taps into expects pipe (4), has flanked 2 dust-collecting pipes (5) in the neighbour of feed pipe (4),
Dust-collecting pipe (5) top is connected to volume damper (3) and ventilation duct (2), and the ventilation duct (2) is the tee pipe fitting of falling Y-shaped,
2 branch pipes of ventilation duct (2) are connect with volume damper (3).
4. one kind according to claim 1 can accurately control blanking and dust is without the dust collection cover flown upward, feature exists
In: the turnover panel (12) and rotating plate shaft (11) are welded, and the both ends spindle nose of the rotating plate shaft (11) passes through bearing block (10), described to turn over
Plate connecting rod (9) one end is connect with one end spindle nose of rotating plate shaft (11) by flat key, the other end and turnover panel air cylinder (7) piston rod head
Hingedly, the turnover panel air cylinder (7) is fixed on turnover panel air cylinder support (8) by connecting bolt, turnover panel air cylinder support (8) weldering
Connect in ventilator cowling (6) side, the piston rod of the turnover panel air cylinder (7) it is flexible by turnover panel connecting rod (9) driving rotating plate shaft (11) and
Turnover panel (12) is rotated by 90 °.
5. one kind according to claim 1 can accurately control blanking and dust is without the dust collection cover flown upward, feature exists
In: the turntable (13) and the steel plate bolt that shaft (14) lower end is welded are affixed, the upper end of the shaft (14) and connecting rod
(17) it is connected by flat key, the connecting rod (17) and rotary cylinder (16) piston head are hinged, and the rotary cylinder (16) is fixed on
On rotary cylinder support (15), the rotary cylinder support (15) is fixed on the side of ventilator cowling (6), the rotary cylinder (16)
Piston rod it is flexible rotated by connecting rod (17) drive shaft (14), shaft (14) drives turntable (13) horizontal direction to be rotated by 90 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910771108.3A CN110420959A (en) | 2019-08-20 | 2019-08-20 | It is a kind of accurately to control blanking and dust is without the dust collection cover flown upward |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910771108.3A CN110420959A (en) | 2019-08-20 | 2019-08-20 | It is a kind of accurately to control blanking and dust is without the dust collection cover flown upward |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110420959A true CN110420959A (en) | 2019-11-08 |
Family
ID=68415357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910771108.3A Pending CN110420959A (en) | 2019-08-20 | 2019-08-20 | It is a kind of accurately to control blanking and dust is without the dust collection cover flown upward |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110420959A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3669405A (en) * | 1970-02-23 | 1972-06-13 | Jansen Gmbh Th | Flap valve |
| JPH11179184A (en) * | 1997-12-25 | 1999-07-06 | Freunt Ind Co Ltd | Powder and granular material treatment apparatus |
| CN104565404A (en) * | 2014-12-22 | 2015-04-29 | 中冶南方工程技术有限公司 | Non-driven automatic reset turning plate valve |
| CN106523722A (en) * | 2016-12-05 | 2017-03-22 | 姚均甫 | Automatic flap valve |
| CN207089701U (en) * | 2017-07-07 | 2018-03-13 | 青岛科技大学 | A kind of device realized small powder weighing and convey non-dusting and leakage |
| CN210474942U (en) * | 2019-08-20 | 2020-05-08 | 青岛众屹科锐工程技术有限公司 | Dust collection cover capable of accurately controlling blanking and preventing dust from flying |
-
2019
- 2019-08-20 CN CN201910771108.3A patent/CN110420959A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3669405A (en) * | 1970-02-23 | 1972-06-13 | Jansen Gmbh Th | Flap valve |
| JPH11179184A (en) * | 1997-12-25 | 1999-07-06 | Freunt Ind Co Ltd | Powder and granular material treatment apparatus |
| CN104565404A (en) * | 2014-12-22 | 2015-04-29 | 中冶南方工程技术有限公司 | Non-driven automatic reset turning plate valve |
| CN106523722A (en) * | 2016-12-05 | 2017-03-22 | 姚均甫 | Automatic flap valve |
| CN207089701U (en) * | 2017-07-07 | 2018-03-13 | 青岛科技大学 | A kind of device realized small powder weighing and convey non-dusting and leakage |
| CN210474942U (en) * | 2019-08-20 | 2020-05-08 | 青岛众屹科锐工程技术有限公司 | Dust collection cover capable of accurately controlling blanking and preventing dust from flying |
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