CN108361373A - Vertical fast opening blind promotes pivoted arm composition - Google Patents
Vertical fast opening blind promotes pivoted arm composition Download PDFInfo
- Publication number
- CN108361373A CN108361373A CN201810130972.0A CN201810130972A CN108361373A CN 108361373 A CN108361373 A CN 108361373A CN 201810130972 A CN201810130972 A CN 201810130972A CN 108361373 A CN108361373 A CN 108361373A
- Authority
- CN
- China
- Prior art keywords
- opening blind
- pivoted arm
- cross beam
- connecting cross
- arm composition
- 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
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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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J13/00—Covers or similar closure members for pressure vessels in general
- F16J13/16—Pivoted closures
- F16J13/20—Pivoted closures mounted by mobile fastening on swinging arms
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/115—Caps
- F16L55/1155—Caps fixed by rotating a limited amplitude
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Emergency Lowering Means (AREA)
Abstract
The present invention discloses a kind of vertical fast opening blind promotion pivoted arm composition, include fixed part, connecting cross beam and hanging part, fixed part is used to lock-ring-type fast-opening blind pivoted arm composition being fixed on lock-ring-type fast-opening blind, one end of connecting cross beam is connected with the connection column being vertically arranged, and the other end of connecting cross beam has been connected with hanging part；One end lower part for playing hanging part is provided with hook in connecting cross beam, after opening the cover board of lock-ring-type fast-opening blind, hook is fixed for that will play hanging part.After cover board is opened, since weight is larger, stable unlatching cannot ensure, therefore lifting lead screw axis pin is caught on by the hook of setting, and then cover board is fixed, security performance is ensured well.Tumbler assembly is realized by hydraulic package to be opened and is closed, and is substantially reduced resistance when end cap switch, easily switch end cap is realized under very small outer force effect, especially suitable for bigbore vertical fast opening blind.
Description
Technical field
The present invention relates to a kind of pivoted arm structures more particularly to a kind of vertical fast opening blind to promote pivoted arm composition.
Background technology
In the corollary equipments such as pressure vessel, pressure pipeline, fast opening blind is a kind of to be commonly quickly turned on and off dress
It sets.Being widely used in gas filter, combustion gas filter separator, cyclone filter, receiving ball tube etc. need to irregularly open and close
Equipment.
Lock-ring-type fast-opening blind is mainly made of components such as shell flange, end cap, lock ring, blind plate attachmentes, certainly using lip
The seal form of close seal is realized out by opening, closing retaining mechanism, the rotation of pivoted arm composition, safety interlock for overhead etc.
Shutdown mechanism drives end cap revolution or moves up and down to realize unlatching, the closing motion of blind plate, the safety connection installed on end cap
Locking device can ensure equipment in almost zero pressure（Less than 3kPa）Under can open.
Pivoted arm forms the building block one of important as its, and performance directly affects the use of lock-ring-type fast-opening blind.
Existing pivoted arm is fixed after opening by the mutual attachment force of component, due to pivoted arm composition heavier-weight itself, cause
After unlatching not enough securely, there are security risks.
Invention content
It is a primary object of the present invention to, overcome defect existing for existing pivoted arm, and a kind of vertical fast opening blind is provided
Pivoted arm composition is promoted, the fastness after drawing high is provided, thus more suitable for practicality, and with the utility value in industry.
The present invention is realized using following scheme：
The present invention proposes that a kind of vertical fast opening blind promotes pivoted arm composition, includes fixed part, connecting cross beam and hanging part, fixes
Portion is used to lock-ring-type fast-opening blind pivoted arm composition being fixed on lock-ring-type fast-opening blind, one end of connecting cross beam be vertically arranged
Connection column be connected, the other end of connecting cross beam has been connected with hanging part；In connecting cross beam close to one end lower part for playing hanging part
It is provided with hook, after opening the cover board of lock-ring-type fast-opening blind, hook is fixed for that will play hanging part.
Preferably, vertical fast opening blind above-mentioned promotes pivoted arm composition, it includes that oil cylinder forms, lifting connects to play hanging part
Head and lifting lead screw axis pin, wherein oil cylinder composition include hydraulic cylinder and hydraulic pressure pump group at as the dynamic of opening and closing cover board
Power component；
Oil cylinder composition is connected on one end of connecting cross beam, hanger fitting is connected in the lower part of oil cylinder composition, in hanger fitting
On be provided with lifting lead screw axis pin；After cover board is opened, since weight is larger, stable unlatching cannot ensure, therefore pass through
The hook of setting catches on lifting lead screw axis pin, and then cover board is fixed.Security performance is ensured well.
Preferably, vertical fast opening blind above-mentioned promotes pivoted arm composition, it is connected with column is connect in connecting cross beam
It is formed at the position at right angle and is provided with stiffener, the shape of the stiffener is corresponding with the rectangular shaped of formation；Stiffener
In the presence of primarily to reinforce connecting cross beam and connect column between connection, prevent beam deformation.One end of stiffener is fixed
On connecting cross beam, the other end is fixed on connection column, plays the role of second consolidation, and preferably a kind of shape is：With it is straight
The corresponding triangle in angle, in order to reduce weight, the wherein right angle of triangle can remove.
Preferably, vertical fast opening blind above-mentioned promotes pivoted arm composition, hanging beam is internally provided in connection column
The lower external face of main shaft, hanging beam main shaft is provided with otic placode connecting tube, upper ear plate is provided with above otic placode connecting tube, in ear
It is provided with lower ear plate below plate connecting tube；Reinforcement is provided between the outer surface of otic placode connecting tube, upper ear plate and lower ear plate
Plate, the presence of reinforcing plate increase entire lock-ring-type fast-opening blind pivoted arm composition primarily to so that total is more secured
Switching performance between blind plate.
Preferably, vertical fast opening blind above-mentioned promotes pivoted arm composition, in the outer surface of connection column, upper ear plate
Top is provided with limit shaft.
Preferably, vertical fast opening blind above-mentioned promotes pivoted arm composition, in the outer surface of connection column close to upper ear
The position of plate is provided with limiting plate, and limit gusset is provided between connection column and limiting plate.
The beneficial effects of the present invention are：
The vertical fast opening blind of the present invention promotes pivoted arm composition, by stringent FEM mechanics analysis, the ratio of all parts
Operating mode setting is simulated, security performance is relatively reliable.
Wear-resisting property is more excellent, washer protection is both provided at each articulating members, being effectively reduced pivoted arm makes
Abrasion in, prolongs the service life, and reduces maintenance cost.
Pivoted arm structure is used as by hydraulic package to be opened and the actuating unit of closure flap, excessively additional need not be applied
Power.
Increase hook structure, after cover board is opened, further fixed cover board by linking up with, ensures security performance, especially
It is to be directed to heavy caliber blind plate, weight is heavier, the requirement higher to safety.
Description of the drawings
Fig. 1 is that the vertical fast opening blind of the present invention promotes pivoted arm composition front view；
Fig. 2 is that vertical fast opening blind promotes pivoted arm composition vertical view；
Fig. 3 is the first structural schematic diagram of ribbed stiffener；
Fig. 4 is second of structural schematic diagram of ribbed stiffener；
Fig. 5 is the third structural schematic diagram of ribbed stiffener；
Mark meaning in figure：1. lower ear plate, 2. times sealing plates, 3. hanging beam main shafts, 4. first bearings, 5. first O-rings, 6. otic placodes connect
It takes over, 7. reinforcing plates, 8. second bearings, 9. upper ear plates, 10. upper sealing plates, the 11, second O-ring, 12. third O-rings, in 13.
Hexagonal screw rod, 14. limit shafts, 15. axis spring washers, 16. limiting plates, 17. limit gussets, 18. connection columns, 19. hanging beams
Column connector sleeve, 20. studs, 21. nuts, 22. washers, 23. connection transverse tube bolt pipe sleeves, 24. connection transverse tubes, 25. stiffeners,
26. oil cylinder forms, 27. first hex bolts, 28. oil cylinder backing plates, 29. crossbeam end sockets, 30. hanger fittings, 31. second hexagonal spiral shells
Bolt, 32. lifting lead screw axis pins, 33. axis check rings, 34. lifting lever seats, 35. cover boards lift by crane connecting flange, 36. safety
Hanging scroll, 37. safety pole hanging scrolls, 38. axis spring washers, 39. spring(-supported) mounts, 40. springs, 41. cross slot bolts, 42. hooks,
43. ribbed stiffener.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Embodiment 1
The present invention discloses a kind of vertical fast opening blind promotion pivoted arm composition, including following chunking, fixed part, connect connecting cross beam 24
It connects column 18 and plays hanging part, fixed part is used to lock-ring-type fast-opening blind pivoted arm composition being fixed on lock-ring-type fast-opening blind, even
The one end for connecing crossbeam 24 is connected with the connection column 18 being vertically arranged, and the other end of connecting cross beam 24 has been connected with hanging part；
Connecting cross beam 24 is provided with hook 42 close to one end lower part for playing hanging part, for fixing described hanging part.
Stiffener 25 is provided with connecting column 18 and be connected to be formed at the position at right angle in connecting cross beam 24, stiffener 25
Shape it is corresponding with the rectangular shaped of formation.The presence of stiffener 25 is primarily to reinforcing connecting cross beam 24 and connecting column
Connection between 18 prevents connecting cross beam 24 from deforming.One end of stiffener 25 is fixed on connecting cross beam 24, and the other end is fixed on
It connects on column 18, plays the role of second consolidation, preferably a kind of shape is：Triangle corresponding with right angle, in order to
Weight is reduced, the wherein right angle of triangle can remove, and form structure as shown in Figure 1.
Unlatching and closure that cover board is realized in hanging part are wherein played, includes mainly that oil cylinder forms the 26, first hex bolts 27, oil cylinder
Backing plate 28, hanger fitting 30, the second hex bolts 31, lifting lead screw axis pin 32, axis check ring 33,34 and of lifting lever seat
Cover board lifts by crane connecting flange 35.
Oil cylinder composition 26 is connected on connecting cross beam 24, is arranged at link position of the oil cylinder composition 26 with connecting cross beam 24
There is oil cylinder backing plate 28；It is connected with hanger fitting 30 in the lower part of oil cylinder composition 26, lifting lead screw is provided on hanger fitting 30
Axis pin 32.The outer surface of lifting lead screw axis pin 32 is provided with axis check ring 33.The lower part of hanger fitting 30 is provided with lifting
Lever seat 34 is provided with cover board in the outer surface of lifting lever seat 34 and lifts by crane connecting flange 35.
Wherein fixed part includes lower ear plate 1, lower sealing plate 2, first bearing 4, the first O-ring 5, otic placode connecting tube 6, reinforces
Plate 7, second bearing 8, upper ear plate 9, upper sealing plate 10, the second O-ring 11, third O-ring 12, interior hexagonal screw rod 13, limit shaft 14,
Axis spring washer 15, limiting plate 16 and limit gusset 17.
It is internally provided with hanging beam main shaft 3 in connection column 18, the lower external face of hanging beam main shaft 3 is provided with otic placode connection
Pipe 6 is provided with upper ear plate 9 in the top of otic placode connecting tube 6, and the top of upper ear plate 9 is provided with upper sealing plate 10；In otic placode connecting tube
6 lower section is provided with lower ear plate 1, and the lower part of lower ear plate 1 is provided with lower sealing plate 2.In the outer surface of otic placode connecting tube 6, upper ear plate 9
Reinforcing plate 7 is provided between lower ear plate 1.The top of the outer surface of connection column 18, upper ear plate 9 is provided with limit shaft 14.
Connection column 18 outer surface the position of upper ear plate 9 is provided with limiting plate 16, connection column 18 and limiting plate 16 it
Between be provided with limit gusset 17.
The outer surface of wherein hanging beam main shaft 3 is provided with connection column 18, and the outer surface of connection column 18 is provided with hanging beam and stands
Column connector sleeve 19, hanging beam main shaft 3 are respectively arranged with first bearing 4 and between upper ear plate 9 and the link position of lower ear plate 1
Two bearings 8 are convenient for the rolling of hanging beam main shaft 3, reduce frictional force.
Safe hanging scroll 36 is arranged by safety pole hanging scroll 37 on the top of oil cylinder composition 26, and auxiliary cylinder forms 26 operations,
Axis spring washer 38 is provided between safe hanging scroll 36 and safety pole hanging scroll 37 in order to reduce friction.
Oil cylinder composition 26 is connected on one end of connecting cross beam, and hanger fitting 30 is connected in the lower part of oil cylinder composition 26,
Lifting lead screw axis pin 32 is provided on hanger fitting 30；After cover board is opened, since weight is larger, stabilization cannot ensure
It opens, therefore lifting lead screw axis pin is caught on by the hook of setting 42, and then cover board is fixed, security performance is protected well
Barrier.
One preferred technical solution, as shown in figure 3, being the partial enlargement structural representation of stiffener 25, in order to mitigate
Weight, saves the manufacturing cost of material, and stiffener 25 is hollowed out at the position that transverse tube 24 is connected with connecting column 18 and connect, and is dug
The area of empty part is 1 with the area ratio of stiffener 25：6.
One preferred technical solution, for the high weight member in the technical program, mitigating weight has important reality
Border meaning, at this time stiffener 25 hollowed out at the position that is connected of transverse tube 24 with connecting column 18 and connect, the area of cut-out
Area ratio with stiffener 25 is 1：4.5, as shown in Figure 4.
One preferred technical solution, in order to improve the consolidation effect of stiffener 25, at this time in the upper surface of stiffener 25
45 ° are tilted with vertical direction and is provided with ribbed stiffener 43, as shown in Figure 5.
Verified by contrast test, in above-mentioned scheme, scheme as shown in Figure 4, stiffener 25 with connect column 18 and
It is hollowed out at the position that connection transverse tube 24 is connected, the area of cut-out is 1 with the area ratio of stiffener 25：When 4.5, material
Consolidation effect is best, and weight is most light.
The vertical fast opening blind of the present invention promotes pivoted arm composition, by stringent FEM mechanics analysis, all parts
Scale modeling operating mode is set, and security performance is relatively reliable.
Wear-resisting property is more excellent, washer protection is both provided at each articulating members, being effectively reduced pivoted arm makes
Abrasion in, prolongs the service life, and reduces maintenance cost.
Pivoted arm structure is used as by hydraulic package to be opened and the actuating unit of closure flap, excessively additional need not be applied
Power.
Increase hook structure, after cover board is opened, cover board is further fixed by linking up with, ensures security performance.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of vertical fast opening blind promotes pivoted arm composition, it is characterised in that：Include fixed part, connecting cross beam（24）And lifting
Portion, the fixed part are used to lock-ring-type fast-opening blind pivoted arm composition being fixed on lock-ring-type fast-opening blind, the connecting cross beam
（24）One end and the connection column that is vertically arranged（18）It is connected, the connecting cross beam（24）The other end be connected with described rise
Hanging part；In the connecting cross beam（24）One end lower part for playing hanging part is provided with hook（42）, for described hanging part to be consolidated
It is fixed.
2. vertical fast opening blind according to claim 1 promotes pivoted arm composition, it is characterised in that：Described hanging part includes
Oil cylinder forms（26）, hanger fitting（30）With lifting lead screw axis pin（32）, the oil cylinder composition（26）It is horizontal to be connected to the connection
Beam（24）On, it is formed in the oil cylinder（26）Lower part be connected with hanger fitting（30）, in the hanger fitting（30）Upper setting
There is lifting lead screw axis pin（32）.
3. vertical fast opening blind according to claim 1 promotes pivoted arm composition, it is characterised in that：In the connecting cross beam
（24）With connect column（18）It is connected to be formed and is provided with stiffener at the position at right angle（25）, the stiffener（25）Shape
It is corresponding with the rectangular shaped of formation.
4. vertical fast opening blind according to claim 1 promotes pivoted arm composition, it is characterised in that：In the connection column
（18）Be internally provided with hanging beam main shaft（3）, the hanging beam main shaft（3）Lower external face be provided with otic placode connecting tube（6）,
The otic placode connecting tube（6）Top be provided with upper ear plate（9）, in the otic placode connecting tube（6）Lower section be provided with lower ear plate
（1）；In the otic placode connecting tube（6）Outer surface, upper ear plate（9）And lower ear plate（1）Between be provided with reinforcing plate（7）.
5. vertical fast opening blind according to claim 4 promotes pivoted arm composition, it is characterised in that：In the connection column
（18）Outer surface, the upper ear plate（9）Top be provided with limit shaft（14）.
6. vertical fast opening blind according to claim 4 or 5 promotes pivoted arm composition, it is characterised in that：It is vertical in the connection
Column（18）Outer surface close to the upper ear plate（9）Position be provided with limiting plate（16）, in the connection column（18）And limit
Position plate（16）Between be provided with limit gusset（17）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810130972.0A CN108361373B (en) | 2018-02-09 | 2018-02-09 | Vertical fast opening blind promotes pivoted arm composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810130972.0A CN108361373B (en) | 2018-02-09 | 2018-02-09 | Vertical fast opening blind promotes pivoted arm composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108361373A true CN108361373A (en) | 2018-08-03 |
| CN108361373B CN108361373B (en) | 2019-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810130972.0A Active CN108361373B (en) | 2018-02-09 | 2018-02-09 | Vertical fast opening blind promotes pivoted arm composition |
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Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3386612A (en) * | 1966-07-20 | 1968-06-04 | Creal E. Kirkwood | Quick-opening lid for pressure vessels |
| DE4222726A1 (en) * | 1992-07-10 | 1994-01-13 | Hpt Konstruktion Und Service H | Pressurised chemical vessel sealed by quick-operating bar lock - cannot be accidently opened when vessel is under pressure |
| CN201306443Y (en) * | 2008-12-01 | 2009-09-09 | 上海航天能源有限公司 | Integrated insert alarm screw used for lock-ring-type fast-opening blind |
| CN201401602Y (en) * | 2009-04-21 | 2010-02-10 | 湖北兴成石化设备有限公司 | Clamp-type quick opening blind plate |
| CN202812181U (en) * | 2012-09-13 | 2013-03-20 | 泰安市山口锻压有限公司 | Automatic guide device for quick-opening valve of pressure container |
| CN103157332A (en) * | 2013-03-27 | 2013-06-19 | 中国石油天然气集团公司 | Filter |
| CN103206537A (en) * | 2013-04-03 | 2013-07-17 | 中国石油集团工程设计有限责任公司 | Hydraulic switching mechanism and switching method for quick-opening blind plate |
| CN203235469U (en) * | 2013-03-27 | 2013-10-16 | 中国石油天然气集团公司 | Vertical type rapidly opened type pressure container inner part lifting mechanism |
| CN103436432A (en) * | 2013-08-27 | 2013-12-11 | 江阴德尔热能机械有限公司 | Quick-opening manhole |
| CN103557326A (en) * | 2013-09-09 | 2014-02-05 | 开原化工机械制造有限公司 | Hydraulic quick-opening device |
| CN203656173U (en) * | 2013-11-06 | 2014-06-18 | 乐山川天燃气输配设备有限公司 | Lock ring type quick opening and closing blind plate device |
| CN104696511A (en) * | 2013-12-09 | 2015-06-10 | 安徽索维机电设备制造有限公司 | Container end cover lifting rotary on-off device |
| CN205559768U (en) * | 2016-04-22 | 2016-09-07 | 江苏华正环保科技有限公司 | Liftable translation rotation type pressure vessel upper cover structure |
| CN205820839U (en) * | 2016-06-27 | 2016-12-21 | 江苏盛伟过滤设备有限公司 | A kind of fast opening blind door closure boom hoisting |
| CN106402382A (en) * | 2016-12-12 | 2017-02-15 | 乐山川天燃气输配设备有限公司 | Accumulated water corrosion prevention blind plate capable of being quickly opened and closed |
| CN206972908U (en) * | 2017-07-07 | 2018-02-06 | 开原化工机械制造有限公司 | A kind of horizontal quick-opening device |
-
2018
- 2018-02-09 CN CN201810130972.0A patent/CN108361373B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3386612A (en) * | 1966-07-20 | 1968-06-04 | Creal E. Kirkwood | Quick-opening lid for pressure vessels |
| DE4222726A1 (en) * | 1992-07-10 | 1994-01-13 | Hpt Konstruktion Und Service H | Pressurised chemical vessel sealed by quick-operating bar lock - cannot be accidently opened when vessel is under pressure |
| CN201306443Y (en) * | 2008-12-01 | 2009-09-09 | 上海航天能源有限公司 | Integrated insert alarm screw used for lock-ring-type fast-opening blind |
| CN201401602Y (en) * | 2009-04-21 | 2010-02-10 | 湖北兴成石化设备有限公司 | Clamp-type quick opening blind plate |
| CN202812181U (en) * | 2012-09-13 | 2013-03-20 | 泰安市山口锻压有限公司 | Automatic guide device for quick-opening valve of pressure container |
| CN103157332A (en) * | 2013-03-27 | 2013-06-19 | 中国石油天然气集团公司 | Filter |
| CN203235469U (en) * | 2013-03-27 | 2013-10-16 | 中国石油天然气集团公司 | Vertical type rapidly opened type pressure container inner part lifting mechanism |
| CN103206537A (en) * | 2013-04-03 | 2013-07-17 | 中国石油集团工程设计有限责任公司 | Hydraulic switching mechanism and switching method for quick-opening blind plate |
| CN103436432A (en) * | 2013-08-27 | 2013-12-11 | 江阴德尔热能机械有限公司 | Quick-opening manhole |
| CN103557326A (en) * | 2013-09-09 | 2014-02-05 | 开原化工机械制造有限公司 | Hydraulic quick-opening device |
| CN203656173U (en) * | 2013-11-06 | 2014-06-18 | 乐山川天燃气输配设备有限公司 | Lock ring type quick opening and closing blind plate device |
| CN104696511A (en) * | 2013-12-09 | 2015-06-10 | 安徽索维机电设备制造有限公司 | Container end cover lifting rotary on-off device |
| CN205559768U (en) * | 2016-04-22 | 2016-09-07 | 江苏华正环保科技有限公司 | Liftable translation rotation type pressure vessel upper cover structure |
| CN205820839U (en) * | 2016-06-27 | 2016-12-21 | 江苏盛伟过滤设备有限公司 | A kind of fast opening blind door closure boom hoisting |
| CN106402382A (en) * | 2016-12-12 | 2017-02-15 | 乐山川天燃气输配设备有限公司 | Accumulated water corrosion prevention blind plate capable of being quickly opened and closed |
| CN206972908U (en) * | 2017-07-07 | 2018-02-06 | 开原化工机械制造有限公司 | A kind of horizontal quick-opening device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108361373B (en) | 2019-07-16 |
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