CN106311408B - A kind of large-scale vertical Ball-stirring mill automatic shutter grinding door system - Google Patents
A kind of large-scale vertical Ball-stirring mill automatic shutter grinding door system Download PDFInfo
- Publication number
- CN106311408B CN106311408B CN201610705736.8A CN201610705736A CN106311408B CN 106311408 B CN106311408 B CN 106311408B CN 201610705736 A CN201610705736 A CN 201610705736A CN 106311408 B CN106311408 B CN 106311408B
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- Prior art keywords
- grinding door
- door
- folding
- cylinder
- grinding
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- 238000003756 stirring Methods 0.000 title claims abstract description 15
- 238000001514 detection method Methods 0.000 claims description 19
- 238000009434 installation Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 239000003351 stiffener Substances 0.000 description 3
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 2
- 235000011613 Pinus brutia Nutrition 0.000 description 2
- 241000018646 Pinus brutia Species 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/40—Safety devices, e.g. detection of obstructions or end positions
- E05F15/49—Safety devices, e.g. detection of obstructions or end positions specially adapted for mechanisms operated by fluid pressure, e.g. detection by monitoring transmitted fluid pressure
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/50—Power-operated mechanisms for wings using fluid-pressure actuators
- E05F15/53—Power-operated mechanisms for wings using fluid-pressure actuators for swinging wings
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2201/00—Constructional elements; Accessories therefor
- E05Y2201/40—Motors; Magnets; Springs; Weights; Accessories therefor
- E05Y2201/43—Motors
- E05Y2201/448—Fluid motors; Details thereof
- E05Y2201/454—Cylinders
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2201/00—Constructional elements; Accessories therefor
- E05Y2201/40—Motors; Magnets; Springs; Weights; Accessories therefor
- E05Y2201/43—Motors
- E05Y2201/448—Fluid motors; Details thereof
- E05Y2201/458—Valves
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2999/00—Subject-matter not otherwise provided for in this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Pinball Game Machines (AREA)
Abstract
The invention discloses a kind of large-scale vertical Ball-stirring mill automatic shutter grinding door system, grinding door upper backup pad and grinding door lower supporting plate are provided with outside grinding door, transversely set respectively on grinding door upper backup pad and grinding door lower supporting plate there are one open and close gusset piece；Folding arm is additionally provided with outside grinding door, the one end for opening and closing arm is set among two folding gusset pieces and is hinged with two folding gusset pieces；Cylinder is equipped with folding upper backup pad and folding lower supporting plate, linear hydraulic cylinder is additionally provided with outside cylinder, the other end for opening and closing arm is in triangular shape, the side at the end is located among folding upper backup pad and folding lower supporting plate and hinged with folding upper backup pad and folding lower supporting plate, the other side and the end of the piston rod of linear hydraulic cylinder are hinged, and the cylinder barrel bottom of linear hydraulic cylinder is hingedly arranged on cylinder；Balanced valve is configured on linear hydraulic cylinder；Safe and efficient grinding door automatic shutter can be achieved in the present invention, reduces labor intensity, reduces enterprise's cost of labor.
Description
Technical field
The present invention relates to Ball-stirring mill fields, concretely relate to a kind of large-scale vertical Ball-stirring mill automatic shutter grinding door system
System.
Background technology
The grinding door of large-scale vertical Ball-stirring mill is similar to the hinge structure of household door, and high 5000mm of grinding door size or so is wide
4800mm or so, weight is at 20 tons or so.
Domestic opening and closing grinding door pulls steel wire rope using overhead traveling crane at present, grinding door is pulled open, after maintenance, then manually
Cooperation overhead traveling crane closes grinding door, needs live someone's work, commander.Since grinding door size, weight are big, inertia is also big, no
It is easy to start and stop, manually opening time-consuming and laborious, and there are insecurity.
The present invention can realize automatic shutter grinding door by lever principle, using hydraulic system, improve efficiency, increase safety
Property, reduce cost.
Invention content
It is an object of the present invention to which it is automatic to provide a kind of large-scale vertical Ball-stirring mill for solution problems of the prior art
Grinding door system is opened and closed, it can be achieved that safe and efficient grinding door automatic shutter, reduces labor intensity, reduces enterprise's cost of labor.
To achieve the above object, the technical solution adopted in the present invention is：A kind of large-scale vertical Ball-stirring mill automatic shutter mill
Door system includes the cylinder in hollow form, and cylinder side is equipped with opening, and is hingedly equipped with grinding door in the side.
It is provided with grinding door upper backup pad and grinding door lower supporting plate outside the grinding door, is supported under grinding door upper backup pad and grinding door
Gusset piece is opened and closed there are one transversely being set respectively on plate；Folding arm is additionally provided with outside grinding door, the one end for opening and closing arm is opened set on two
It closes among gusset piece and hinged with two folding gusset pieces；
It is relatively set with folding upper backup pad and folding lower supporting plate on the cylinder, is additionally provided with outside cylinder for driving
The linear hydraulic cylinder that grinding door opens and closes, the other end for opening and closing arm are in triangular shape, and the side setting at the end in folding upper backup pad and is opened
Close among lower supporting plate and hinged with folding upper backup pad and folding lower supporting plate, the other side and the piston rod of linear hydraulic cylinder
End is hinged, and the cylinder barrel bottom of linear hydraulic cylinder is hingedly arranged on cylinder；Configured with for making grinding door stop on linear hydraulic cylinder
In designated position and balanced valve that grinding door can be made locked；
It is equipped on the folding arm and closes a detection block and enabling detection block, opened and closed and be equipped with that close door close on upper backup pad
Switch opens and closes and is equipped with enabling on lower supporting plate close to switch；In the state of enabling, linear hydraulic cylinder is shunk to drive folding
Arm moves backward, and when the close switch that opens the door detects enabling detection block, balanced valve receives the inspection opened the door close to switch transmission
Linear hydraulic cylinder stop motion is controlled after surveying signal, so that grinding door is parked in designated position and locks；In the state of closing door, straight line liquid
Cylinder pressure elongation detects that balanced valve, which receives, to be closed when closing detection block to drive folding arm to travel forward, when closing door close to switch
Linear hydraulic cylinder stop motion is controlled after the detection signal that door is sent close to switch, so that grinding door is parked in designated position and grinding door is made to lock
Extremely.
Multiple be used for the small-sized hydraulic jack of the open-top certain angle of grinding door, small-sized hydraulic thousand is provided in the grinding door
The one end on jin top is arranged in grinding door, and the other end is used for the side wall of top pressure cylinder.
The length direction of the folding arm is parallel with the width direction of grinding door.
Oil cylinder backplate is installed on the cylinder, the cylinder barrel bottom of linear hydraulic cylinder is hingedly arranged in oil cylinder backplate.
The folding arm includes upper plate and lower plate, and the end of the piston rod is connect with upper plate and lower plate by axis pin, on
The centre of plate and lower plate is evenly arranged with multiple support plates.
The quantity of the small-sized hydraulic jack is four, is symmetricly set on the four corners of grinding door.
The small-sized hydraulic jack is threaded in grinding door.
Compared with prior art, beneficial effects of the present invention are：
1, it is ground for ore pulp due to vertical mixing mill, grinding door, which exists, to be bonded, can be light by using small-sized hydraulic jack
By grinding door top pine, reliable previous work is provided for subsequent opening and closing grinding door；
2, the present invention uses hydraulic-driven so that driving torque is big, operates steadily, compact-sized, if driven using motor
It is dynamic, then it needs to configure retarder and improves torque, can cause complicated huge；
3, present invention uses lever constructions, combine together with vertical mixing mill, make compact overall structure, space availability ratio
Height, occupied space are few；
4, the present invention is configured with balanced valve, and grinding door can be made to be parked in and require position and lock, and improves safety, no longer needs to use
External mechanical hatching gate；
5, the present invention is configured with close to switch, and monitoring and controlling is opened and closed stroke, it is ensured that the travel position of mechanism meets the requirements, and carries
If the cost of equipment will be significantly greatly increased using servo hydraulic cylinder in high security, and the present invention matches splice grafting using Normal hydraulic cylinder
Nearly switch can significantly reduce cost；
6, the present invention also have simple in structure, manufacture, installation, maintenance convenience, smooth running, it is cost-effective, be easily achieved
The characteristics of seriation.
Description of the drawings
Fig. 1 is the axonometric drawing one of the embodiment of the present invention.
Fig. 2 is the front view of the embodiment of the present invention.
Fig. 3 is to close a Stroke Control schematic diagram.
Fig. 4 is the local location enlarged diagram of Fig. 3.
Fig. 5 is the axonometric drawing two of the embodiment of the present invention.
Fig. 6 is the local location enlarged diagram of Fig. 5.
It is marked in figure：1, cylinder, 2, grinding door, 3, small-sized hydraulic jack, 4, grinding door upper backup pad, 5, folding gusset piece,
6, grinding door lower supporting plate, 7, folding arm, 8, folding upper backup pad, 9, folding lower supporting plate, 10, linear hydraulic cylinder, 11, oil cylinder shield
Plate, 12, close door close to switch, 13, close a detection block, 14, open the door close to switch, 15, enabling detection block.
Specific implementation mode
The present invention is described in further detail below in conjunction with the accompanying drawings.
As shown, a kind of large-scale vertical Ball-stirring mill automatic shutter grinding door system, includes the cylinder 1 in hollow form, cylinder 1
Side is equipped with opening, and is hingedly equipped with grinding door 2 in the side, and multiple be used for 2 open-top certain angle of grinding door is provided in grinding door 2
Small-sized hydraulic jack 3, it is optimal to select to be by the quantity of small-sized hydraulic jack 3 to be four, and it is symmetricly set on grinding door
Four corners.Wherein, one end of small-sized hydraulic jack 3, which is connected through a screw thread, is arranged in grinding door 2, and the other end is used for top pressure cylinder
1 side wall.
Grinding door upper backup pad 4 and grinding door lower supporting plate 6 are provided with outside the grinding door 2, under grinding door upper backup pad 4 and grinding door
Support plate 6 can be welded on outside grinding door 2, be can also be the modes such as to be bolted to be fixed at outside grinding door 2, ground
Gusset piece 5 is opened and closed there are one transversely being set respectively on door upper backup pad 4 and grinding door lower supporting plate 6；Folding is additionally provided with outside grinding door 2
Arm 7, the length direction for opening and closing arm 7 are parallel with the width direction of grinding door 2.The one end for opening and closing arm 7 is set in two folding gusset pieces 5
Between and it is hinged with two folding gusset pieces 5, folding arm 7 includes upper plate and lower plate, the end of piston rod and the upper plate of folding arm 7 and
Lower plate is connected by axis pin, and the upper plate and the centre of lower plate for opening and closing arm 7 are evenly arranged with multiple support plates, be used to support upper plate and
Lower plate simultaneously prevents it to be easily deformed.
Folding upper backup pad 8 and folding lower supporting plate 9, folding upper backup pad 8 and lower of folding are installed on the cylinder 1
Fagging 9 is oppositely arranged, and is welded on cylinder 1, and the upper end for opening and closing upper backup pad 8 is connected with stiffener plate, opens and closes lower supporting plate 9
Lower end be connected with stiffener plate, the purpose that stiffener plate is set be prevent folding upper backup pad 8 and open and close lower supporting plate 9 be easy
Deformation improves intensity；It is additionally provided with the linear hydraulic cylinder 10 for driving grinding door 2 to open and close outside cylinder 1, opens and closes the other end of arm 7
In triangular shape, the side setting at the end among folding upper backup pad 8 and folding lower supporting plate 9 and with open and close upper backup pad 8 and
It opens and closes lower supporting plate 9 to be hinged, the other side and the end of the piston rod of linear hydraulic cylinder 10 are hinged, due to being installed with oil on cylinder 1
The cylinder barrel bottom of cylinder backplate 11, linear hydraulic cylinder 10 is hingedly arranged in oil cylinder backplate 11.
Configured with the balanced valve for making grinding door 2 be parked in designated position and grinding door 2 can be made locked on linear hydraulic cylinder 10.
It is equipped on the folding arm 7 and closes a detection block 13 and enabling detection block 15, opened and closed to be equipped on upper backup pad 8 and close
Door opens and closes close to switch 12 and is equipped with enabling on lower supporting plate 9 close to switch 14；In the state of enabling, linear hydraulic cylinder 10
It shrinks to drive folding arm 7 to move backward, when the close switch 14 that opens the door detects enabling detection block 15, balanced valve receives out
10 stop motion of control linear hydraulic cylinder, makes grinding door 2 be parked in designated position and locks after the detection signal that door is sent out close to switch 14
Extremely；In the state of closing door, the elongation of linear hydraulic cylinder 10 is detected when closing door close to switch 12 with driving folding arm 7 to travel forward
To when closing detection block 13, balanced valve receives close the detection signal that door is sent out close to switch 12 after control linear hydraulic cylinder 10 and stop
It only moves, grinding door 2 is made to be parked in designated position and keeps grinding door 2 locked.
When work, first by after the bolt in grinding door completely dismounting, small-sized hydraulic jack is reused by grinding door top
Then pine is pulled open grinding door by linear hydraulic cylinder.
Claims (6)
1. a kind of large-scale vertical Ball-stirring mill automatic shutter grinding door system, includes the cylinder in hollow form（1）, cylinder（1）Side is set
There is opening, and grinding door is hingedly equipped in the side（2）, it is characterised in that：
The grinding door（2）Outside is provided with grinding door upper backup pad（4）With grinding door lower supporting plate（6）, grinding door upper backup pad（4）And mill
Door lower supporting plate（6）It is upper transversely set respectively there are one open and close gusset piece（5）；Grinding door（2）Outside is additionally provided with folding arm（7）, open
Close arm（7）One end be set to two folding gusset pieces（5）It is intermediate and with two folding gusset pieces（5）It is hinged；
The cylinder（1）On be relatively set with folding upper backup pad（8）With folding lower supporting plate（9）, cylinder（1）Outside is additionally provided with
For driving grinding door（2）The linear hydraulic cylinder of keying（10）, open and close arm（7）The other end be in triangular shape, open and close arm（7）In triangle
The side setting of shape one end is in folding upper backup pad（8）With folding lower supporting plate（9）It is intermediate and with folding upper backup pad（8）With open
Close lower supporting plate（9）It is hinged, and with linear hydraulic cylinder（10）Piston rod end it is hinged, linear hydraulic cylinder（10）Cylinder barrel bottom
Portion is hingedly arranged in cylinder（1）On；Linear hydraulic cylinder（10）It is upper to be configured with for making grinding door（2）It is parked in designated position and can make
Grinding door（2）Locked balanced valve；
The folding arm（7）On be equipped with and close a detection block（13）With enabling detection block（15）, open and close upper backup pad（8）Upper installation
Door is closed close to switch（12）, open and close lower supporting plate（9）On be equipped with enabling close to switch（14）；In the state of enabling, directly
Line hydraulic cylinder（10）It shrinks to drive folding arm（7）It moves backward, when the close switch that opens the door（14）Detect enabling detection block
（15）When, balanced valve receives enabling close to switch（14）Linear hydraulic cylinder is controlled after the detection signal sent out（10）Stop fortune
It is dynamic, make grinding door（2）It is parked in designated position and locks；In the state of closing door, linear hydraulic cylinder（10）Elongation is to drive folding arm
（7）It travels forward, when closing, door is close to be switched（12）It detects and closes a detection block（13）When, balanced valve, which receives, closes door close to switch
（12）Linear hydraulic cylinder is controlled after the detection signal sent out（10）Stop motion makes grinding door（2）It is parked in designated position and makes grinding door
（2）It is locked；
The grinding door（2）On be provided with it is multiple for by grinding door（2）The small-sized hydraulic jack of open-top certain angle（3）, small-sized
Hydraulic jack（3）One end be arranged in grinding door（2）On, the other end is used for top pressure cylinder（1）Side wall.
2. a kind of large-scale vertical Ball-stirring mill automatic shutter grinding door system according to claim 1, it is characterised in that：It is described to open
Close arm（7）Length direction and grinding door（2）Width direction it is parallel.
3. a kind of large-scale vertical Ball-stirring mill automatic shutter grinding door system according to claim 1, it is characterised in that：The cylinder
Body（1）On be installed with oil cylinder backplate（11）, linear hydraulic cylinder（10）Cylinder barrel bottom be hingedly arranged in oil cylinder backplate（11）It is interior.
4. a kind of large-scale vertical Ball-stirring mill automatic shutter grinding door system according to claim 1, it is characterised in that：It is described to open
Close arm（7）Including upper plate and lower plate, the end of the piston rod and upper plate and lower plate are hinged, and the centre of upper plate and lower plate is uniformly set
It is equipped with multiple support plates.
5. a kind of large-scale vertical Ball-stirring mill automatic shutter grinding door system according to claim 1, it is characterised in that：It is described small
Type hydraulic jack（3）Quantity be four, be symmetricly set on the four corners of grinding door.
6. a kind of large-scale vertical Ball-stirring mill automatic shutter grinding door system according to claim 1, it is characterised in that：It is described small
Type hydraulic jack（3）It is threaded in grinding door（2）On.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610705736.8A CN106311408B (en) | 2016-08-23 | 2016-08-23 | A kind of large-scale vertical Ball-stirring mill automatic shutter grinding door system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610705736.8A CN106311408B (en) | 2016-08-23 | 2016-08-23 | A kind of large-scale vertical Ball-stirring mill automatic shutter grinding door system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106311408A CN106311408A (en) | 2017-01-11 |
| CN106311408B true CN106311408B (en) | 2018-10-12 |
Family
ID=57741924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610705736.8A Active CN106311408B (en) | 2016-08-23 | 2016-08-23 | A kind of large-scale vertical Ball-stirring mill automatic shutter grinding door system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106311408B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464009B (en) * | 2021-08-06 | 2023-03-31 | 佛山市博顿光电科技有限公司 | Film coating machine door opening and closing device and system, door opening and closing control method and film coating machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201106349Y (en) * | 2007-09-12 | 2008-08-27 | 深圳市凯卓立液压设备有限公司 | System for unlatching vehicle wing door |
| CN201109161Y (en) * | 2007-10-31 | 2008-09-03 | 三一重工股份有限公司 | Vertical axis agitator discharging gate |
| CN101666242A (en) * | 2009-09-24 | 2010-03-10 | 中国人民解放军总参谋部工程兵第四设计研究院 | Hydraulic vertically rotary airtight flood and preventive partition door in metro running |
| CN101715504A (en) * | 2007-05-03 | 2010-05-26 | 瓦博泰克控股公司 | Locking mechanism for pneumatic differential engine for power-operated doors |
| CN103696643A (en) * | 2013-12-25 | 2014-04-02 | 济南重工股份有限公司 | Four-connection-bar structure sliding door for mill |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07145684A (en) * | 1993-11-24 | 1995-06-06 | Nippon Trailmobile Co Ltd | Switchgear for rear door of van-type car utilizing fluid pressure |
-
2016
- 2016-08-23 CN CN201610705736.8A patent/CN106311408B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101715504A (en) * | 2007-05-03 | 2010-05-26 | 瓦博泰克控股公司 | Locking mechanism for pneumatic differential engine for power-operated doors |
| CN201106349Y (en) * | 2007-09-12 | 2008-08-27 | 深圳市凯卓立液压设备有限公司 | System for unlatching vehicle wing door |
| CN201109161Y (en) * | 2007-10-31 | 2008-09-03 | 三一重工股份有限公司 | Vertical axis agitator discharging gate |
| CN101666242A (en) * | 2009-09-24 | 2010-03-10 | 中国人民解放军总参谋部工程兵第四设计研究院 | Hydraulic vertically rotary airtight flood and preventive partition door in metro running |
| CN103696643A (en) * | 2013-12-25 | 2014-04-02 | 济南重工股份有限公司 | Four-connection-bar structure sliding door for mill |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106311408A (en) | 2017-01-11 |
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