CN108817112A - A kind of protective device in middle machine drawing - Google Patents
A kind of protective device in middle machine drawing Download PDFInfo
- Publication number
- CN108817112A CN108817112A CN201810565501.2A CN201810565501A CN108817112A CN 108817112 A CN108817112 A CN 108817112A CN 201810565501 A CN201810565501 A CN 201810565501A CN 108817112 A CN108817112 A CN 108817112A
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- China
- Prior art keywords
- fixedly connected
- spring
- fixed plate
- shield
- workbench
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- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
-
- 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
- F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
- F16P1/00—Safety devices independent of the control and operation of any machine
- F16P1/04—Screens or hoods rotating with rotary shafts
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
Abstract
The invention discloses the protective devices in a kind of middle machine drawing, including workbench, the left side of the workbench is fixedly connected with the right side of rotating device, the upper surface of rotating device is fixedly connected with the lower surface of connecting plate, it is fixedly connected on the left of the upper surface of connecting plate and shield lower surface, the right side of shield is fixedly connected with the left side of the first fixed plate, the right side of workbench is fixedly connected with the left side of the second fixed plate, first through hole is offered vertically in first fixed plate, the second through-hole is offered in second fixed plate vertically, the upper surface of first fixed plate is welded with bracket.Protective device in this in machine drawing, pass through the first spring of setting, slide bar, sliding sleeve, bracket, fixture block, the first groove, second spring and telescopic rod, so as to can quickly open shield when copper wire is broken during stretching drawing, it is time saving and energy saving, high-efficient, to staff, when copper wire is broken, wiring operation is brought conveniently.
Description
Technical field
Protective device the present invention relates to protective device technical field, in specially a kind of middle machine drawing.
Background technique
Copper is soft metal, is reddish orange band metallic luster when surface is just cut, and simple substance is in aubergine, and ductility is good,
Thermal conductivity and electric conductivity are high, therefore are most common materials in cable and electrical, electronic component, it is also possible to make construction material, it can
To form numerous kinds of alloys, copper alloy mechanical performance is excellent, and resistivity is very low, most important one number bronze and brass, copper wire
Need to use middle machine drawing in use, copper wire intermediate drawing is the machinery for thick copper lines to be drawn into thin copper wire.
The stretching case of middle machine drawing stretches the copper wire between case and line sending cylinder due to jitter amplitude during stretching drawing copper wire
It is larger, and copper wire is in tensioned state when stretching drawing, therefore phenomenon of rupture can occur for copper wire, the protection dress in existing middle machine drawing
Setting all is to be fixedly connected using bolt on the table, and after copper wire is broken, the opening of shield is excessively troublesome, time-consuming
Arduously, low efficiency influences the progress of work, brings inconvenience to the opening and closing shield work of staff.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, it the present invention provides the protective device in a kind of middle machine drawing, solves existing
Protective device in middle machine drawing is all to be fixedly connected using bolt on the table, after copper wire is broken, shield
It opens and excessively bothers, time-consuming and laborious, low efficiency influences the progress of work, to the opening and closing shield work belt of staff
Inconvenient problem is carried out.
(2) technical solution
To achieve the above object, the present invention provides the following technical solutions：A kind of protective device in middle machine drawing, including work
Make platform, the left side of the workbench is fixedly connected with the right side of rotating device, the upper surface of the rotating device and connection
The lower surface of plate is fixedly connected, and is fixedly connected on the left of the upper surface and shield lower surface of the connecting plate, the shield
Right side be fixedly connected with the left side of the first fixed plate, the left side of the right side of the workbench and the second fixed plate is solid
It is fixed to connect, first through hole is offered vertically in first fixed plate, offers the second through-hole vertically in second fixed plate,
The upper surface of first fixed plate is welded with bracket, and the upper surface of the bracket is connected with sliding sleeve, the inner wall sleeve of the sliding sleeve
It is connected to slide bar, the outside of the slide bar is socketed with the first spring, and the top of the slide bar is fixedly connected with the lower surface of pressing plate, institute
The bottom end for stating the first spring is fixedly connected with the upper surface of sliding sleeve, the fixed company in the top of first spring and the lower surface of pressing plate
It connects, the outside of the slide bar is socketed with limit plate, and limit plate is located in bracket, and the bottom of the slide bar left side offers
One groove, the inside of second fixed plate offer cavity, and the lower surface of second fixed plate offers the second groove, and
Second groove is connected to by cavity with the second through-hole, the fixed company in the left side of the cavity inner sidewall and the left end of telescopic device
It connects, the right end of the telescopic device is fixedly connected with the left side of fixture block, and fixture block and the first groove are clamped, the telescopic device
The right side of lower surface is fixedly connected with the upper surface of handle, and handle passes through the second groove and extends to outside the second fixed plate, institute
The upper surface for stating workbench is fixedly connected with the bottom end of two support rods, and the top of two support rods is connected with threading respectively
Ring, the thimble is interior to be equipped with copper wire, and the upper surface of the workbench is fixedly connected with the lower surface for stretching drawing case.
Preferably, the rotating device is made of two bearings and a shaft, and the right side of two bearings is and work
The left side for making platform is fixedly connected, and the inner wall of two bearings is rotatablely connected with the anode of shaft and backside respectively.
Preferably, the telescopic device is made of telescopic rod and second spring, and the outside of the telescopic rod is socketed with second
Left side of the left and right ends of spring, the second spring and telescopic rod respectively with the left side of cavity inner sidewall and fixture block is fixed
Connection.
Preferably, the right side of the telescopic rod lower surface is fixedly connected with the upper surface of handle.
Preferably, the anode of the copper wire is wrapped on line sending cylinder, and the backside of the copper wire is wrapped on wire winding tube, and is received
Spool is fixedly connected with the output shaft of driving motor.
Preferably, observation window is provided on the shield, the observation window is specially transparent glass.
(3) beneficial effect
The present invention provides the protective devices in a kind of middle machine drawing, have following beneficial effect：
1, the protective device in this in machine drawing, by the first spring of setting, slide bar, sliding sleeve, bracket, fixture block, first recessed
Slot, second spring and telescopic rod, when copper wire is broken, the left toggle handle of staff's case makes handle that telescopic rod be driven to receive
Contracting, to drive second spring to shrink, so that fixture block, which is moved to the left, is detached from the first groove, since the elastic reaction of the first spring makes
It obtains the first spring band dynamic pressure plate to move up, to be moved up with moving slide-bar, so that slide bar is detached from the second through-hole, revolve counterclockwise
Turn shield so as to open shield to copper wire carry out wiring work, when wiring completion after, when needing to close shield,
Rotating clockwise shield overlaps the first fixed plate and the second fixed plate, and then pressing pressing plate makes pressing plate drive cunning down
Bar moves down, and squeezes fixture block to the left when slide bar is contacted with fixture block, so that fixture block drives telescopic rod and second spring to shrink, when
Slide bar continues to be moved downward to the first groove and when fixture block is in same horizontal line, since the elastic reaction of second spring makes
Second spring drives telescopic rod to restore to the original state to the right, sticks into the first groove so that fixture block be driven to move right, to complete anti-
The closing of shield is fixed, so as to can quickly open shield, time saving province when copper wire is broken during stretching drawing
Power, high-efficient, to staff, when copper wire is broken, wiring operation is brought conveniently.
2, the protective device in this in machine drawing, by setting slide bar, sliding sleeve and limit plate, so that when pressing pressing plate
So that pressing plate band moving slide-bar moved up and down in sliding sleeve it is more stable, by be arranged limit plate, to avoid slide bar in sliding sleeve
The sliding sleeve being detached from bracket when moving up and down, ensure that the stability that slide bar moves up and down.
3, the protective device in this in machine drawing, by the first spring of setting, second spring and telescopic rod, so as to
Using the elastic reaction of the first spring the first spring is moved up when opening shield by pressing plate band moving slide-bar, closed
Elastic reaction when shield using second spring makes second spring that fixture block be driven to stick into the second groove, the opening of shield
It is time saving and energy saving with closing process, it is brought conveniently to the work of staff, and structure of the invention is compact, design is rationally, practical
Property is strong.
Detailed description of the invention
Fig. 1 is the schematic diagram of the section structure of main view of the present invention；
Fig. 2 is the schematic diagram of the section structure of left view of the present invention；
Fig. 3 is the structural schematic diagram amplified at A of the present invention.
In figure：1, workbench；2, rotating device；201, bearing；202, shaft；3, connecting plate；4, shield；5, first is solid
Fixed board；6, the second fixed plate；7, first through hole；8, the second through-hole；9, bracket；10, sliding sleeve；11, slide bar；12, the first spring；
13, pressing plate；14, limit plate；15, the first groove；16, cavity；17, telescopic device；1701, telescopic rod；1702, second spring；
18, fixture block；19, the second groove；20, handle；21, support rod；22, thimble；23, copper wire；24, drawing case is stretched；25, observation window.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1-3, the present invention provides a kind of technical solution：A kind of protective device in middle machine drawing, including work
The left side of platform 1, workbench 1 is fixedly connected with the right side of rotating device 2, and rotating device 2 is turned by two bearings 201 and one
Axis 202 forms, and the right side of two bearings 201 is fixedly connected with the left side of workbench 1, and two bearings 201 is interior
Wall is rotatablely connected with the anode of shaft 202 and backside respectively, by setting bearing 201 and shaft 202, so that shield 4
It can be rotated on workbench 1 around shaft 202, thus realize the opening and closing of shield 4, the upper surface of rotating device 2
It is fixedly connected, is fixedly connected on the left of the upper surface and 4 lower surface of shield of connecting plate 3, shield with the lower surface of connecting plate 3
Observation window 25 is provided on 4, observation window 25 is specially transparent glass, and by the way that observation window 25 is arranged, and observation window 25 is specially saturating
Bright glass, so that staff can observe the process that copper wire 23 stretches drawing at any time, convenient for going out during copper wire 23 stretches drawing
It finds and handles in time when being now broken, the right side of shield 4 is fixedly connected with the left side of the first fixed plate 5, workbench 1
Right side is fixedly connected with the left side of the second fixed plate 6, offers first through hole 7 in the first fixed plate 5 vertically, and second is fixed
The second through-hole 8 is offered on plate 6 vertically, the upper surface of the first fixed plate 5 is welded with bracket 9, and the upper surface of bracket 9 is connected with cunning
Set 10, by the way that sliding sleeve 10 is arranged, so that when pressing plate 13 moves up and down in sliding sleeve 10 with moving slide-bar 11 when pressing pressing plate 13
More stable, the inner wall of sliding sleeve 10 is socketed with slide bar 11, and the outside of slide bar 11 is socketed with the first spring 12, by the way that the first bullet is arranged
Spring 12, so that with hand, toggle handle 20 makes handle 20 that telescopic rod 1701 be driven to be moved to the left to the left when opening shield 4, from
And second spring 1702 is driven to shrink, so that fixture block 18 is moved to the left and is detached from fixture block 18, due to the elasticity of the first spring 12
Effect is so that the first spring 12 has a upward elastic force, to be moved up with dynamic pressure plate 13, thus with moving slide-bar 11 to
On be moved out the second through-hole 8 so that staff can open shield 4, under the top of slide bar 11 and pressing plate 13
Surface is fixedly connected, and the bottom end of the first spring 12 is fixedly connected with the upper surface of sliding sleeve 10, the top of the first spring 12 and pressing plate
13 lower surface is fixedly connected, and the outside of slide bar 11 is socketed with limit plate 14, and limit plate 14 is located in bracket 9, and slide bar 11 is left
The bottom of side offers the first groove 15, and the inside of the second fixed plate 6 offers cavity 16, the lower surface of the second fixed plate 6
Offer the second groove 19, and the second groove 19 is connected to by cavity 16 with the second through-hole 8, the left side of 16 inner sidewall of cavity and
The left end of telescopic device 17 is fixedly connected, and telescopic device 17 is made of telescopic rod 1701 and second spring 1702, telescopic rod 1701
Outside be socketed with second spring 1702, the right side of 1701 lower surface of telescopic rod is fixedly connected with the upper surface of handle 20, second
Left side of the left and right ends of spring 1702 and telescopic rod 1701 respectively with the left side of 16 inner sidewall of cavity and fixture block 18 is fixed
Connection, by the way that second spring 1702 is arranged, so that when pressing pressing plate 13 is moved down with moving slide-bar 11, slide bar 11 and card
Block 18 squeezes fixture block 18 when contacting to the left, so that fixture block 18 drives second spring 1702 and telescopic rod 1701 to shrink, when slide bar 11
When continuing to be moved down into the first groove 15 and being in same horizontal line with fixture block 18, due to the elastic reaction of second spring 1702
So that second spring 1702 drives telescopic rod 1701 to restore to the original state, so that fixture block 18 be driven to stick into the first groove 15, stretch dress
It sets 17 right end to be fixedly connected with the left side of fixture block 18, and fixture block 18 and the first groove 15 are clamped, 17 lower surface of telescopic device
Right side be fixedly connected with the upper surface of handle 20, and handle 20 pass through the second groove 19 extend to outside the second fixed plate 6, work
The upper surface for making platform 1 is fixedly connected with the bottom end of two support rods 21, and the top of two support rods 21 is connected with threading respectively
Ring 22, thimble 22 is interior to be equipped with copper wire 23, and the anode of copper wire 23 is wrapped on line sending cylinder, and the backside of copper wire 23 is wrapped in wire winding tube
On, and wire winding tube is fixedly connected with the output shaft of driving motor, company is fixed with the lower surface for drawing case 24 is stretched in the upper surface of workbench 1
It connects.
In use, the left toggle handle 20 of staff's case makes handle 20 drive telescopic rod when copper wire 23 is broken
1701 shrink, to drive second spring 1702 to shrink, so that fixture block 18, which is moved to the left, is detached from the first groove 15, due to the first bullet
The elastic reaction of spring 12 moves up the first spring 12 with dynamic pressure plate 13, to move up with moving slide-bar 11, so that sliding
Bar 11 is detached from the second through-hole 8, and rotation shield 4 carries out wiring work so as to open shield 4 to copper wire 23 counterclockwise, when
After wiring is completed, when needing to close shield 4, rotates clockwise shield 4 and make the first fixed plate 5 and the second fixed plate 6
Overlap joint, then pressing pressing plate 13 moves down pressing plate 13 with moving slide-bar 11 down, when slide bar 11 and fixture block 18 are contacted to
Left extruding fixture block 18, so that fixture block 18 drives telescopic rod 1701 and second spring 1702 to shrink, when slide bar 11 continues to move down
When being in same horizontal line to the first groove 15 with fixture block 18, since the elastic reaction of second spring 1702 makes second spring
1702 drive telescopic rods 1701 restore to the original state to the right, stick into the first groove 15 so that fixture block 18 be driven to move right, thus complete
It is fixed at the closing of shield.
It can to sum up obtain, 1, the protective device in this in machine drawing, pass through the first spring 12 of setting, slide bar 11, sliding sleeve 10, branch
Frame 9, fixture block 18, the first groove 15, second spring 1702 and telescopic rod 1701, when copper wire 23 is broken, staff's case
Left toggle handle 20 makes handle 20 that telescopic rod 1701 be driven to shrink, to drive second spring 1702 to shrink, so that fixture block 18
It is moved to the left and is detached from the first groove 15, since the elastic reaction of the first spring 12 makes the first spring 12 with dynamic pressure plate 13 to moving up
It is dynamic, to move up with moving slide-bar 11, so that slide bar 11 is detached from the second through-hole 8, rotate shield 4 counterclockwise so as to beat
It opens shield 4 and wiring work is carried out to copper wire 23, after wiring completion, when needing to close shield 4, rotate clockwise protection
Cover 4 overlaps the first fixed plate 5 and the second fixed plate 6, then down pressing pressing plate 13 make pressing plate 13 with moving slide-bar 11 to
Lower movement squeezes fixture block 18 when slide bar 11 is contacted with fixture block 18 to the left, so that fixture block 18 drives telescopic rod 1701 and the second bullet
Spring 1702 is shunk, when slide bar 11, which continues to be moved downward to the first groove 15, to be in same horizontal line with fixture block 18, due to the
The elastic reaction of two springs 1702 makes second spring 1702 that telescopic rod 1701 be driven to restore to the original state to the right, to drive fixture block 18
It moves right and sticks into the first groove 15, so that the closing for completing shield 4 is fixed, so as to the copper wire 23 during stretching drawing
Shield 4 can be quickly opened when being broken, it is time saving and energy saving, it is high-efficient, give staff's wiring when copper wire 23 is broken
Operation is brought conveniently.
2, the protective device in this in machine drawing, by setting slide bar 11, sliding sleeve 10 and limit plate 14, so that pressing
Move up and down pressing plate 13 in sliding sleeve 10 with moving slide-bar 11 more stable, by the way that limit plate 14 is arranged, thus
The sliding sleeve 10 being detached from bracket 9 when slide bar 11 being avoided to move up and down in sliding sleeve 10, ensure that the stabilization that slide bar 11 moves up and down
Property.
3, the protective device in this in machine drawing, by the way that the first spring 12, second spring 1702 and telescopic rod 1701 is arranged,
It is slided so as to drive the first spring 12 by pressing plate 13 using the elastic reaction of the first spring 12 when opening shield 4
Bar 11 moves up, and makes second spring 1702 drive card using the elastic reaction of second spring 1702 when closing shield 4
Block 18 sticks into the first groove 15, and the opening and closing process of shield 4 is time saving and energy saving, to the work side of bringing of staff
Just, and structure of the invention is compact, and design is rationally, practical.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. the protective device in a kind of middle machine drawing, including workbench (1), it is characterised in that：The left side of the workbench (1)
It is fixedly connected with the right side of rotating device (2), the upper surface of the rotating device (2) and the lower surface of connecting plate (3) are fixed
It connects, is fixedly connected on the left of the upper surface and shield (4) lower surface of the connecting plate (3), the right side of the shield (4)
Face is fixedly connected with the left side of the first fixed plate (5), the right side of the workbench (1) and the left side of the second fixed plate (6)
Face is fixedly connected, and is offered vertically first through hole (7) on first fixed plate (5), is opened vertically on second fixed plate (6)
Equipped with the second through-hole (8), the upper surface of first fixed plate (5) is welded with bracket (9), the upper surface card of the bracket (9)
It is connected to sliding sleeve (10), the inner wall of the sliding sleeve (10) is socketed with slide bar (11), and the outside of the slide bar (11) is socketed with the first bullet
The top of spring (12), the slide bar (11) is fixedly connected with the lower surface of pressing plate (13), the bottom end of first spring (12) with
The upper surface of sliding sleeve (10) is fixedly connected, and the top of first spring (12) is fixedly connected with the lower surface of pressing plate (13), institute
The outside for stating slide bar (11) is socketed with limit plate (14), and limit plate (14) is located in bracket (9), slide bar (11) left side
Bottom offer the first groove (15), the inside of second fixed plate (6) offers cavity (16), second fixed plate
(6) lower surface offers the second groove (19), and the second groove (19) is connected to by cavity (16) with the second through-hole (8), institute
The left side for stating cavity (16) is fixedly connected with the left end of telescopic device (17), the right end and fixture block of the telescopic device (17)
(18) left side is fixedly connected, and fixture block (18) and the first groove (15) are clamped, the right side of telescopic device (17) lower surface
Side is fixedly connected with the upper surface of handle (20), and handle (20) passes through the second groove (19) and extends to the second fixed plate (6) outside
The upper surface in portion, the workbench (1) is fixedly connected with the bottom end of two support rods (21), and the top of two support rods (21)
It is connected with respectively thimble (22), is equipped with copper wire (23) in the thimble (22), the upper surface of the workbench (1) and stretch drawing
The lower surface of case (24) is fixedly connected.
2. the protective device in a kind of middle machine drawing according to claim 1, it is characterised in that：The rotating device (2)
It is made of two bearings (201) and a shaft (202), and left side of the right side of two bearings (201) with workbench (1)
Face is fixedly connected, and the inner wall of two bearings (201) is rotatablely connected with the anode of shaft (202) and backside respectively.
3. the protective device in a kind of middle machine drawing according to claim 1, it is characterised in that：The telescopic device (17)
It is made of telescopic rod (1701) and second spring (1702), the outside of the telescopic rod (1701) is socketed with second spring
(1702), the left and right ends of the second spring (1702) and telescopic rod (1701) left side with cavity (16) inner sidewall respectively
It is fixedly connected with the left side of fixture block (18).
4. the protective device in a kind of middle machine drawing according to claim 3, it is characterised in that：The telescopic rod (1701)
The right side of lower surface is fixedly connected with the upper surface of handle (20).
5. the protective device in a kind of middle machine drawing according to claim 1, it is characterised in that：The copper wire (23) is just
End is wrapped on line sending cylinder, and the backside of the copper wire (23) is wrapped on wire winding tube, and the output shaft of wire winding tube and driving motor
It is fixedly connected.
6. the protective device in a kind of middle machine drawing according to claim 1, it is characterised in that：On the shield (4)
It is provided with observation window (25), the observation window (25) is specially transparent glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810565501.2A CN108817112A (en) | 2018-06-04 | 2018-06-04 | A kind of protective device in middle machine drawing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810565501.2A CN108817112A (en) | 2018-06-04 | 2018-06-04 | A kind of protective device in middle machine drawing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108817112A true CN108817112A (en) | 2018-11-16 |
Family
ID=64144090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810565501.2A Withdrawn CN108817112A (en) | 2018-06-04 | 2018-06-04 | A kind of protective device in middle machine drawing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108817112A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110523633A (en) * | 2019-08-01 | 2019-12-03 | 江苏金天雪莲生态保养有限公司 | A kind of airflow screen that material screening efficiency can be improved |
-
2018
- 2018-06-04 CN CN201810565501.2A patent/CN108817112A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110523633A (en) * | 2019-08-01 | 2019-12-03 | 江苏金天雪莲生态保养有限公司 | A kind of airflow screen that material screening efficiency can be improved |
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| PB01 | Publication | ||
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Application publication date: 20181116 |