CN109126996A - A kind of vertical shaft type multistage bar sand making machine - Google Patents
A kind of vertical shaft type multistage bar sand making machine Download PDFInfo
- Publication number
- CN109126996A CN109126996A CN201811173762.6A CN201811173762A CN109126996A CN 109126996 A CN109126996 A CN 109126996A CN 201811173762 A CN201811173762 A CN 201811173762A CN 109126996 A CN109126996 A CN 109126996A
- Authority
- CN
- China
- Prior art keywords
- bar
- rotor
- bevel gear
- making machine
- sand making
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
- B02C13/16—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters hinged to the rotor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/26—Details
- B02C13/28—Shape or construction of beater elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/26—Details
- B02C13/288—Ventilating, or influencing air circulation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/26—Details
- B02C13/30—Driving mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/26—Details
- B02C13/28—Shape or construction of beater elements
- B02C2013/2812—Shape or construction of beater elements the beater elements are attached to a hollow cylindrical rotor
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
The invention discloses a kind of vertical shaft type multistage bar sand making machines, belong to sand making machine technical field, it is all that interval is fixedly mounted to solve the bar of existing vertical shaft type bar sand making machine, bar can not strike the sandstone between adjacent bar when broken, the broken lesser problem of range, including rack, casing, metal screen drum, driving motor, bar rotor and bar, umbrella baffle is fixedly installed with by outer girth sheets above the bar rotor, bar rotor center is equipped with fixed link, driving mechanism is equipped between the bar rotor and umbrella baffle, driving mechanism includes first bevel gear, second bevel gear, crankshaft-and-connecting-rod, it further include having dust exhaust apparatus, the present invention passes through setting bar rotor, fixed link and driving mechanism, by being swung up and down with upper-part mating band movable plate hammer, expand broken range, broken speed is faster, it improves Crushing efficiency, while it being equipped with dust exhaust apparatus, it is discharged after dust is sufficiently washed, avoids influencing environment and staff's health.
Description
Technical field
The present invention relates to sand making machine technical field, specifically a kind of vertical shaft type multistage bar sand making machine.
Background technique
Natural sand stone is the non-renewable resources in short-term, with the high speed development of China's capital construction, natural sand stone
It is closely exhausted.Simultaneously as excavation sandstone catastrophic collapse caused by resource and environment, for flood control, environmental protection, protection of resources
Etc. all various factors, many cities have been forbidden to use natural sand.Vertical-shaft sand making machine is exactly a kind of building materials system of developed recently
The building stones such as rock, ore or natural cobblestone can be crushed and industrial sand is made, to replace natural sand by sand equipment.
Existing vertical-spindle hammer crusher mostly uses single layer or two-layer rotor structure, and the bar installed on rotor is all that interval is fixed
Installation, then rotor is in driving bar rotation process, bar can not strike the sandstone between adjacent bar, and there are broken models
Enclose lesser problem.
Summary of the invention
The purpose of the present invention is to provide a kind of vertical shaft type multistage bar sand making machines, to solve to propose in above-mentioned background technique
The problem of.
To achieve the above object, the invention provides the following technical scheme:
A kind of vertical shaft type multistage bar sand making machine, including rack, casing, metal screen drum, driving motor, bar rotor and bar,
Casing is equipped with by screw in the rack, passes through strut in casing and is fixed with metal screen drum with one heart, opened at the top of metal screen drum
Mouthful, bar rotor is equipped in metal screen drum, bar rotor bottom is welded with hollow axle with one heart, and hollow axle extends to machine
Below frame, passes through bolt positioned at casing two sides in rack and driving motor is installed, the output shaft of driving motor passes through belt and passes
Dynamic component is connect with hollow axle, is fixedly installed with umbrella baffle by outer girth sheets above the bar rotor, and the bar turns
Sub- inner hollow, bar rotor center are equipped with fixed link, and equidistant interval is equipped with muti-piece bar from top to bottom on bar rotor,
Bar is rotatablely connected by pin shaft and bar rotor sidewall, and driving mechanism is equipped between the bar rotor and umbrella baffle, is driven
Motivation structure includes first bevel gear, second bevel gear, crankshaft-and-connecting-rod, and the first bevel gear is installed in fixed link, and first
Bevel gear two sides pass through mounting plate and bearing is equipped with crankshaft, and crankshaft is equipped with the second cone tooth close to one end of first bevel gear
Wheel, second bevel gear are engaged with first bevel gear, and the rod journal outer cover of the crankshaft is equipped with axle sleeve, the company of axle sleeve and crankshaft
Bar axle journal clearance fit, axle sleeve outer wall are welded with connecting rod, and the connecting rod other end is through bar rotor top and extends to bar
In rotor, bar rotor top offers the through slot for link motion, and the connecting rod other end is hingedly equipped with motion bar, the activity
It is located at bar on bar and is equipped with straight pin, one end that bar is located in bar rotor, which is offered, is inserted into and is slidably connected for straight pin
Sliding slot.
As a further solution of the present invention: the cabinet top two sides are equipped with feed hopper, and bottom of shell two sides are all provided with
There is discharge port.
As a further solution of the present invention: the bar rotor upper and lower ends are mounted on bearing, the bearing outer ring
Side wall is fixedly connected by circumferential more equidistantly fixed struts with casing inner wall.
As a further solution of the present invention: company is fixed through umbrella baffle and with cabinet top in the fixed link top
It connects, fixed link bottom end extends in the fixed plate of bottom of the frame.
As a further solution of the present invention: the motion bar bottom is equipped with guide plate, offers on guide rod for activity
The guide plate of bar movement.
As a further solution of the present invention: further including having dust exhaust apparatus, the dust exhaust apparatus includes exhaust fan, dust cleaning case
And spray tube, the cabinet top two sides are mounted on exhaust fan, and tracheae is connected at exhaust fan air outlet, the tracheae other end passes through
Dust cleaning case intracavity bottom is worn at the top of dust cleaning case and extended to, partition is fixed in the middle part of dedusting box cavity, is located at partition in dust cleaning case
Lower section is water storage cavity, and stomata is offered on partition, and spray tube is equipped at the top of the dust cleaning case, and spray bottom of the tube integral type is equipped with
Multiple nozzles are connected with water supplying pipe on spray tube.
As a further solution of the present invention: the dust cleaning case top side is equipped with escape pipe, and dust cleaning case bottom side is set
There is drainpipe, valve is installed on drainpipe, is located at below partition in the middle part of dust cleaning case and is equipped with water supplement port.
Compared with prior art, the beneficial effects of the present invention are: the present invention passes through setting bar rotor, fixed link, driving
Mechanism, driving mechanism includes first bevel gear, second bevel gear, crankshaft-and-connecting-rod, by upper-part mating band movable plate hammer
Lower swing during bar is swung up and down, expands broken range, is crushed speed faster, improves crushing efficiency, be equipped with simultaneously
Then air extraction with a large amount of dusts is passed through in dust cleaning case by dust exhaust apparatus, exhaust fan by tracheae, first pass through washing
Afterwards, then up flow during, washed again by spray tube, reach better dust removing effects, avoid influence environment and
Staff's health.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of vertical shaft type multistage bar sand making machine.
Fig. 2 is enlarged drawing at the A in Fig. 1.
Fig. 3 is second of structural schematic diagram of vertical shaft type multistage bar sand making machine.
In figure: 1- rack, 2- driving motor, 3- casing, 4- metallic sieve, 5- bar, 6- pin shaft, 7- bar rotor, 8-
Sliding slot, 9- motion bar, 10- umbrella baffle, 11- feed hopper, 12- driving mechanism, 13- fixed link, 14- belt gear, 15-
Discharge port, 16- hollow axle, 17- second bevel gear, 18- crankshaft, 19- axle sleeve, 20- first bevel gear, 21- connecting rod, 22- gas
Pipe, 23- dust cleaning case, 24- partition, 25- spray tube.
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.
Embodiment 1
Please refer to Fig. 1~2, in the embodiment of the present invention, a kind of vertical shaft type multistage bar sand making machine, including rack 1, casing 3, metal
Screen drum 4, driving motor 2, bar rotor 7 and bar 5 are equipped with casing 3 by screw in the rack 1, pass through branch in casing 3
Bar is fixed with metal screen drum 4 with one heart, and 4 top opening of metal screen drum, metal screen drum 4 is interior to be equipped with bar rotor 7,7 bottom of bar rotor
Portion is welded with hollow axle 16 with one heart, and hollow axle 16 extends to 1 lower section of rack, and it is logical to be located at 3 two sides of casing in rack 1
It crosses bolt and driving motor 2 is installed, the output shaft of driving motor 2 is connect by belt driving member 14 with hollow axle 16, institute
It states 3 top two sides of casing and is equipped with feed hopper 11,3 two sides of the bottom of casing are equipped with discharge port 15, the bar rotor about 7 two
End is mounted on bearing, and the bearing outer ring side wall is fixedly connected by circumferential more equidistantly fixed struts with 3 inner wall of casing,
Umbrella baffle 10,7 inner hollow of bar rotor are fixedly installed with by outer girth sheets above the bar rotor 7, bar turns
Sub 7 centers are equipped with fixed link 13,13 top of fixed link through umbrella baffle 10 and be fixedly connected at the top of casing 3, fixed link
13 bottom ends extend in the fixed plate of 1 bottom of rack, and equidistant interval is equipped with muti-piece bar 5, plate from top to bottom on bar rotor 7
Hammer 5 is rotatablely connected by pin shaft 6 and 7 side wall of bar rotor, and driving mechanism is equipped between the bar rotor 7 and umbrella baffle 10
12, driving mechanism 12 includes first bevel gear 20, second bevel gear 17, crankshaft 18 and connecting rod 21, and the first bevel gear 20 is pacified
Loaded in fixed link 13,20 two sides of first bevel gear pass through mounting plate and bearing is equipped with crankshaft 18, and crankshaft 18 is close to first
One end of bevel gear 20 is equipped with second bevel gear 17, and second bevel gear 17 is engaged with first bevel gear 20, the crankshaft 18
Rod journal outer cover is equipped with axle sleeve 19, the rod journal clearance fit of axle sleeve 19 and crankshaft 18, and 19 outer wall of axle sleeve is welded and fixed
There is connecting rod 21,21 other end of connecting rod is through 7 top of bar rotor and extends in bar rotor 7, offers at the top of bar rotor 7
For the through slot that connecting rod 21 moves, 21 other end of connecting rod is hingedly equipped with motion bar 9, and 9 bottom of motion bar is equipped with guide plate, guide rod
On offer the guide plate moved for motion bar 9, be located at bar 5 on the motion bar 9 and be equipped with straight pin, bar 5 is located at plate
One end in hammer rotor 7 offers the sliding slot 8 that is inserted into and is slidably connected for straight pin, and the cylinder pin end is equipped with spacer pin,
Straight pin and sliding slot 8 is avoided to be detached from, driving motor 2 drives bar rotor 7 to rotate by belt gear 14, bar rotor 7
It is rotated by band dynamic crankshaft 18 around fixed link 13, while second bevel gear 17 is engaged with first bevel gear 20, second bevel gear
17 band dynamic crankshafts 18 rotate, and crankshaft 18 drives motion bar 9 to move up and down by connecting rod 21, and motion bar 9 passes through straight pin and sliding slot 8
Mating band movable plate hammer 5 is swung up and down, and during bar 5 is swung up and down, expands broken range, is crushed speed faster, is improved
Crushing efficiency.
Embodiment 2
Referring to Fig. 3, the present embodiment is difference from example 1 is that further include having dust exhaust apparatus, the dust exhaust apparatus packet
Exhaust fan, dust cleaning case 23 and spray tube 25 are included, the 3 top two sides of casing are mounted on exhaust fan, connect at exhaust fan air outlet
It is connected to tracheae 22,22 other end of tracheae is through 23 top of dust cleaning case and extends to 23 intracavity bottom of dust cleaning case, 23 inner cavity of dust cleaning case
Middle part is fixed with partition 24, and being located in dust cleaning case 23 is water storage cavity below partition 24, offers stomata, the dedusting on partition 24
Spray tube 25 is installed at the top of case 23,25 bottom integral type of spray tube is equipped with multiple nozzles, is connected with water supplying pipe on spray tube 25,
Then air extraction with a large amount of dusts is passed through in dust cleaning case 23 by exhaust fan by tracheae 22, after first passing through washing, so
After flow up during, washed again by spray tube 25, reach better dust removing effects, 23 top one of dust cleaning case
Side is equipped with escape pipe, and 23 bottom side of dust cleaning case is equipped with drainpipe, and valve is equipped on drainpipe, be located in the middle part of dust cleaning case 23 every
Water supplement port is equipped with below plate 24.
The working principle of the invention is: raw material being added in casing 3 by feed hopper 11, starts driving motor 2, driving motor
2 drive bar rotor 7 to rotate by belt gear 14, and bar rotor 7 passes through band dynamic crankshaft 18 and rotates around fixed link 13,
Second bevel gear 17 is engaged with first bevel gear 20 simultaneously, and second bevel gear 17 is rotated with dynamic crankshaft 18, and crankshaft 18 passes through connecting rod
21 drive motion bar 9 to move up and down, and motion bar 9 is swung up and down by straight pin and 8 mating band movable plate of sliding slot hammer 5, about 5 bar
In swing process, broken range is expanded, speed is crushed faster, improves crushing efficiency, meanwhile, exhaust fan will be with a large amount of ashes
Then the air extraction of dirt is passed through in dust cleaning case 23 by tracheae 22, after first passing through washing, during flowing then up,
It is washed again by spray tube 25, reaches better dust removing effects, avoid influencing environment and staff's health.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (8)
1. a kind of vertical shaft type multistage bar sand making machine, including rack (1), casing (3), metal screen drum (4), driving motor (2), plate
It hammers rotor (7) and bar (5) into shape, is equipped with casing (3) on the rack (1) by screw, it is solid with one heart by strut in casing (3)
Surely have metal screen drum (4), metal screen drum (4) top opening, be equipped with bar rotor (7) in metal screen drum (4), bar rotor (7)
Bottom is welded with hollow axle (16) with one heart, and hollow axle (16) extends to below rack (1), and machine is located in rack (1)
Shell (3) two sides pass through bolt and are equipped with driving motor (2), and the output shaft of driving motor (2) passes through belt driving member (14)
It is connect with hollow axle (16), which is characterized in that umbrella baffle is fixedly installed with by outer girth sheets above the bar rotor (7)
(10), bar rotor (7) inner hollow, bar rotor (7) center are equipped with fixed link (13), on bar rotor (7) from
On down equidistant interval be equipped with muti-piece bar (5), bar (5) is rotatablely connected by pin shaft (6) and bar rotor (7) side wall,
Driving mechanism (12) are equipped between the bar rotor (7) and umbrella baffle (10)；
The driving mechanism (12) includes first bevel gear (20), second bevel gear (17), crankshaft (18) and connecting rod (21), described
First bevel gear (20) is installed on fixed link (13), and first bevel gear (20) two sides pass through mounting plate and bearing is equipped with song
Axis (18), crankshaft (18) are equipped with second bevel gear (17) close to the one end of first bevel gear (20), second bevel gear (17) with
The rod journal outer cover of first bevel gear (20) engagement, the crankshaft (18) is equipped with axle sleeve (19), axle sleeve (19) and crankshaft
(18) rod journal clearance fit, axle sleeve (19) outer wall are welded with connecting rod (21), and connecting rod (21) other end runs through bar
It at the top of rotor (7) and extends in bar rotor (7), the through slot for connecting rod (21) movement is offered at the top of bar rotor (7), even
Bar (21) other end is hingedly equipped with motion bar (9), is located at bar (5) on the motion bar (9) and is equipped with straight pin, bar
(5) one end being located in bar rotor (7) offers be inserted into and be slidably connected for straight pin sliding slot (8).
2. vertical shaft type multistage bar sand making machine according to claim 1, which is characterized in that two sides at the top of the casing (3)
It is equipped with feed hopper (11), casing (3) two sides of the bottom are equipped with discharge port (15).
3. vertical shaft type multistage bar sand making machine according to claim 2, which is characterized in that the bar rotor (7) is up and down
Both ends are mounted on bearing, and the bearing outer ring side wall is fixed by circumferential more equidistantly fixed struts with casing (3) inner wall
Connection.
4. vertical shaft type multistage bar sand making machine according to claim 3, which is characterized in that fixed link (13) top is passed through
It wears umbrella baffle (10) and is fixedly connected with casing (3) top, fixed link (13) bottom end extends to the fixed plate of rack (1) bottom
On.
5. vertical shaft type multistage bar sand making machine according to claim 1, which is characterized in that motion bar (9) bottom is set
There is guide plate, the guide plate for motion bar (9) movement is offered on guide rod.
6. -5 any vertical shaft type multistage bar sand making machine according to claim 1, which is characterized in that further include having dust suction dress
It sets, the dust exhaust apparatus includes exhaust fan, dust cleaning case (23) and spray tube (25), and two sides are mounted at the top of the casing (3)
Exhaust fan is connected with tracheae (22) at exhaust fan air outlet, and tracheae (22) other end is at the top of dust cleaning case (23) and extends to
Dust cleaning case (23) intracavity bottom, dust cleaning case (23) inner cavity middle part are fixed with partition (24), are located at partition (24) in dust cleaning case (23)
Lower section is water storage cavity, and stomata is offered on partition (24), is equipped with spray tube (25), spray tube at the top of the dust cleaning case (23)
(25) bottom integral type is equipped with multiple nozzles, and spray tube is connected with water supplying pipe on (25).
7. vertical shaft type multistage bar sand making machine according to claim 6, which is characterized in that one at the top of the dust cleaning case (23)
Side is equipped with escape pipe, and dust cleaning case (23) bottom side is equipped with drainpipe, is equipped with valve, position in dust cleaning case (23) on drainpipe
Water supplement port is equipped with below partition (24).
8. a kind of sand system processed comprising vertical shaft type multistage bar sand making machine a method as claimed in any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811173762.6A CN109126996A (en) | 2018-10-09 | 2018-10-09 | A kind of vertical shaft type multistage bar sand making machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811173762.6A CN109126996A (en) | 2018-10-09 | 2018-10-09 | A kind of vertical shaft type multistage bar sand making machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109126996A true CN109126996A (en) | 2019-01-04 |
Family
ID=64810539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811173762.6A Withdrawn CN109126996A (en) | 2018-10-09 | 2018-10-09 | A kind of vertical shaft type multistage bar sand making machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109126996A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110237909A (en) * | 2019-06-27 | 2019-09-17 | 枣庄鑫金山智能机械股份有限公司 | A kind of framework lateral plate for sand making machine |
| CN112221608A (en) * | 2020-09-17 | 2021-01-15 | 余华强 | Soil restoration pre-crushing treatment device for garden maintenance |
| CN113368965A (en) * | 2020-02-25 | 2021-09-10 | 长兴恒丰嘉泰矿山机械有限公司 | Mine breaker with dust removal function |
-
2018
- 2018-10-09 CN CN201811173762.6A patent/CN109126996A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110237909A (en) * | 2019-06-27 | 2019-09-17 | 枣庄鑫金山智能机械股份有限公司 | A kind of framework lateral plate for sand making machine |
| CN113368965A (en) * | 2020-02-25 | 2021-09-10 | 长兴恒丰嘉泰矿山机械有限公司 | Mine breaker with dust removal function |
| CN112221608A (en) * | 2020-09-17 | 2021-01-15 | 余华强 | Soil restoration pre-crushing treatment device for garden maintenance |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190104 |