CN108687959A - A kind of concrete mixer - Google Patents
A kind of concrete mixer Download PDFInfo
- Publication number
- CN108687959A CN108687959A CN201810317765.6A CN201810317765A CN108687959A CN 108687959 A CN108687959 A CN 108687959A CN 201810317765 A CN201810317765 A CN 201810317765A CN 108687959 A CN108687959 A CN 108687959A
- Authority
- CN
- China
- Prior art keywords
- stirring
- drive
- cam
- cylinder
- agitating shaft
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/10—Mixing in containers not actuated to effect the mixing
- B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
- B28C5/16—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a vertical or steeply inclined axis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/0806—Details; Accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/0806—Details; Accessories
- B28C5/0818—Charging or discharging gates or chutes; Sealing means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/16—Discharge means, e.g. with intermediate storage of fresh concrete
- B28C7/162—Discharge means, e.g. with intermediate storage of fresh concrete by means of conveyors, other than those comprising skips or containers, e.g. endless belts, screws, air under pressure
- B28C7/163—Discharge means, e.g. with intermediate storage of fresh concrete by means of conveyors, other than those comprising skips or containers, e.g. endless belts, screws, air under pressure using a pump
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The invention discloses a kind of concrete mixers, including stirring cylinder, agitating shaft and the stirring blade on agitating shaft are equipped in mixing drum body, the side wall for stirring cylinder is equipped with charge door at top, the bottom for stirring cylinder is equipped with discharging assembly, it stirs the monosymmetric of cylinder and is equipped with a pair of of drive cavity, head cover there are one being set at the top of stirring cylinder, it is separately installed with cam in two drive cavities, cam is driven by first motor and is rotated, there are one guide holders for the top fixed installation of cam, the center of guide holder is equipped with the pilot hole of vertical distribution, a drive link is interspersed in pilot hole, the bottom of drive link is connected to by idler wheel rolling, the top of drive link and the bottom of head cover are fixed;Agitating shaft is connected to head cover, and agitating shaft, by the second motor-driven rotation, the present invention can realize the uniformity of concrete stirring, improve the efficiency of concrete stirring.
Description
Technical field
The present invention relates to a kind of concrete stirring technology technology, more particularly to a kind of concrete mixer.
Background technology
Concrete central mix plant is the mechanical equipment that cement, sandstone and water are mixed and stirred into concrete mixture,
It uses on building sites extensive.Traditional concrete central mix plant relies solely on the rotation of agitating shaft to drive stirring blade
Realize stirring effect, still, such stirring can not often be sufficiently stirred concrete, and stirring and it is uneven, need
Mixing time is long, low so as to cause stirring efficiency.
Invention content
Technical problem to be solved by the invention is to provide a kind of concrete mixer, which can realize mixed
The uniformity of solidifying soil stirring, improves the efficiency of concrete stirring.
To achieve the above object, the present invention provides technical solution below:A kind of concrete mixer, including stir
Cylinder is mixed, is equipped with agitating shaft and the stirring blade on agitating shaft in the mixing drum body, the side wall for stirring cylinder leans on
It is equipped with charge door at nearly top, the bottom for stirring cylinder is equipped with discharging assembly, and stirring the monosymmetric of cylinder is equipped with one
To drive cavity, head cover there are one being set at the top of cylinder is stirred, is separately installed with cam in two drive cavities, cam passes through peace
The bottom that seat is mounted on drive cavity is filled, cam is driven by first motor and rotated, and the wheel face and horizontal plane of the cam are convex
The top of wheel is fixedly mounted there are one guide holder, and the center of the guide holder is equipped with the pilot hole of vertical distribution, is worn in pilot hole
It is inserted with a drive link, the bottom of the drive link is connected to by idler wheel rolling, and the top of drive link and the bottom of head cover are solid
It is fixed;The agitating shaft is connected to head cover, and agitating shaft, by the second motor-driven rotation, the stirring blade is equipped with two groups,
Two groups of stirring blades are distributed in the bottom end of agitating shaft at vertical type.
Preferably, there are one resetting spring, one end of the spring for part set of the drive link between pilot hole and cam
It is fixed on the bottom of pilot hole, the other end is fixed on the shaft of drive link.
Preferably, two cams are driven by the same first motor, and the first motor is fixedly mounted wherein
The center of rotation of the outer wall of one drive cavity, two cams is linked together by a transmission shaft, and transmission shaft is close to
One end of one motor and the output end of first motor connect, and the transmission shaft is vertical with the wheel face of cam.
Preferably, discharging assembly includes discharge tube and the discharging pump in discharge tube, the discharge tube are in back taper
Shape, discharge port is equipped at the center of the bottom of discharge tube, and the discharging pump is mounted at discharge port.
Preferably, transmission shaft laterally interts the both sides side wall of discharge tube, and the barrel of the transmission shaft and discharge tube connects
Tactile position is connected by bearing.
Preferably, the inside of discharge tube is that the corresponding position of transmission shaft sets that there are one for accommodating the guiding of transmission shaft
Cylinder, the both ends of the guide cylinder and the barrel of discharge tube are linked together, and the difference of the outer diameter of the internal diameter and transmission shaft of guide cylinder is
3mm, the bearing is located at the both ends of guide cylinder, and bearing is vertical with transmission shaft, and axle envelope is equipped between bearing and guide cylinder,
Gap filling between guide cylinder and transmission shaft has lubricating oil.
Preferably, agitating shaft includes drive section and stirring section, and the stirring blade is set to the bottom of stirring section, described to stir
It mixes and is set at the top of section there are one ball seat, ball seat is linked together setting, bottom and the ball seat of the drive section with stirring section
Top is linked together, and the agitating shaft is rotatablely connected by ball seat and head cover, the head cover be internally provided with one it is hollow
Driving chamber, the drive section are located in driving chamber, and the drive section is driven by the disk link mechanism in driving chamber, and
The centre of sphere around ball seat rotates.
Using above-mentioned technical proposal, the present invention, by the rotation of agitating shaft, makes stirring blade turn in ready-mixed concrete
It is dynamic, realize the stirring to concrete, simultaneously as the cam in drive cavity can drive drive link to move up and down, and therefore, head cover
Up and down motion can be also generated, with the up and down motion of drive link to make agitating shaft move up and down in mixing drum so that stirring
Axis also drives stirring blade to move up and down, so that stirring blade is to concrete while driving stirring blade rotation
It stirs evenly, fully, to improve the stirring efficiency of concrete.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention;
Fig. 2 is the portions the A enlarged drawing of Fig. 1;
Fig. 3 is the scheme of installation of the second motor of the present invention;
Fig. 4 is the state diagram when drive section of the agitating shaft of the present invention swings to centre position;
Fig. 5 is the state diagram when drive section of the agitating shaft of the present invention swings to location right;
Fig. 6 is the state diagram when drive section of the agitating shaft of the present invention swings to left position;
Fig. 7 is the structural schematic diagram of the disk link mechanism of the present invention.
Specific implementation mode
Below in conjunction with the accompanying drawings, by the description of the embodiment, the present invention will be further described:
As shown in Fig. 1 ~ 7, a kind of concrete mixer of the present invention, including stirring cylinder 1, interior be equipped with of stirring cylinder 1 are stirred
Axis 2 and the stirring blade 3 on agitating shaft 2 are mixed, the side wall for stirring cylinder 1 is equipped with charge door 4, stirring at top
The bottom of cylinder 1 is equipped with discharging assembly 7, and discharging assembly 7 includes discharge tube 701 and the discharging pump in discharge tube 701
702, discharge tube 701 is in back taper, and discharge port 703 is equipped at the center of the bottom of discharge tube 701, and discharging pump 702, which is mounted on, to be unloaded
At material mouth 703.
It stirs the monosymmetric of cylinder 1 and is equipped with a pair of of drive cavity 5, the top of stirring cylinder 1 is set there are one head cover 6, and two
Cam 8 is separately installed in a drive cavity 5, cam 8 is mounted on the bottom of drive cavity 5 by mounting base 9, and cam 8 passes through first
The top of the driving rotation of motor 10, the wheel face and horizontal plane of cam 8, cam 8 is fixedly mounted there are one guide holder 11, is oriented to
The center of seat 11 is equipped with the pilot hole 12 of vertical distribution, and a drive link 13, the bottom of drive link 13 are interspersed in pilot hole 12
It is connected to by the rolling of idler wheel 24, the top and the bottom of head cover 6 of drive link 13 are fixed, and two cams 8 rotate synchronously, and two
Drive link 13, which synchronizes, to move up and down, and two cams 8 are driven by the same first motor 10, and realization moves synchronously.Specifically, the
One motor 10 is fixedly mounted on the outer wall of one of drive cavity 5, and the center of rotation of two cams 8 is connected by a transmission shaft 16
It is connected together, two cams 8 are symmetrical, and transmission shaft 16 connects close to the output end of one end of first motor 10 and first motor 10
It connects, transmission shaft 16 is vertical with the wheel face of cam 8, and transmission shaft 16 laterally interts the both sides side wall of discharge tube 701, and transmission shaft 16
The position contacted with the barrel of discharge tube 701 is connected by bearing 704, and the inside of discharge tube 701 is that transmission shaft 16 is corresponding
Position is set there are one the guide cylinder 705 for accommodating transmission shaft 16, and the both ends of guide cylinder 705 and the barrel of discharge tube 701 are linked as
One, and the difference of the outer diameter of the internal diameter of guide cylinder 705 and transmission shaft 16 is 3mm, bearing 704 is located at the two of guide cylinder 705
End, and bearing 704 is vertical with transmission shaft 16, and axle envelope, guide cylinder 705 and transmission shaft 16 are equipped between bearing 704 and guide cylinder 705
Between gap filling have lubricating oil.Part of the drive link 13 between pilot hole 12 and cam 8 is covered there are one resetting spring 15,
One end of spring 15 is fixed on the bottom of pilot hole 12, and the other end is fixed on the shaft of drive link 13.
Agitating shaft 2 is connected to head cover 6, and agitating shaft 2 is driven by the second motor 14 and rotated, and stirring blade 3 is equipped with two
Group, two groups of stirring blades 3 are distributed in the bottom end of agitating shaft 2 at vertical type.Agitating shaft 2 includes drive section 201 and stirring section
202, stirring blade 3 is set to the bottom of stirring section 202, and the top of stirring section 202 is set there are one ball seat 203, ball seat 203 with stir
It mixes section 202 and is linked together setting, the bottom and the top of ball seat 203 of drive section 201 are linked together, and agitating shaft 2 passes through ball
Seat 203 is rotatablely connected with head cover 6, and head cover 6 is internally provided with a hollow driving chamber 601, and drive section 201 is located at driving chamber
In 601, drive section 201 is driven by the disk link mechanism 17 in driving chamber 601, and is turned around the centre of sphere of ball seat 203
It is dynamic.The top of drive section 201 is pierced by the upper cavity wall of driving chamber 601, and the second motor 14 is mounted on the end of drive section 201
On, the top of head cover 6 is equipped with a pair of connecting plate 18 for installing the second motor 14, and the second motor 14 is slided by connecting seat 19
Between two pieces of connecting plates 18, the sliding trace of connecting seat 19 is circular arc, and the center of circle of the circular arc is located at ball seat 203
The centre of sphere.
Disk link mechanism 17 includes the driving wheel 171 of a rotation, and driving wheel 171 is turned by the driving of third motor 172
It is dynamic, a connecting rod 173 is installed on driving wheel 171, hingedly there are one axle sleeve 174, axle sleeves 174 for the other end of connecting rod 173
It is sleeved in drive section 201, and moves back and forth along drive section 201.When third motor 172 starts, third motor 172 drives driving
171 rotation of wheel, driving wheel 171 drive connecting rod 173 to move in a circle, and to make axle sleeve 171 move in a circle, and axle sleeve 174 is then
It drives the drive section 201 of agitating shaft 2 to generate swing around the centre of sphere of ball seat 203, allows for agitating shaft 2 in this way in up and down motion
Meanwhile also having both pendulum motion so that the stirring range bigger of stirring blade 3 further improves the uniformity of stirring.
In addition, the agitating shaft 2 of the present invention also passes through a turntable 20 so that the stirring section 202 of agitating shaft 2 is in stirring cylinder
Axis in 1 around stirring cylinder 1 generates the effect that spiral is swung.Specifically, turntable 20 is rotatably connected on the bottom of driving chamber 601
The center in portion, ball seat 203 be also be rotatably connected on turntable 20, meanwhile, disk link mechanism 17 is also mounted on turntable 20.
The edge of turntable 20 is equipped with driving cog 21, and driving cog 21 is engaged with a driving gear 22 in driving chamber 601, driven
Gear 22 is driven by the 4th motor 23.When the 4th motor 23 starts, 23 driving disc 20 of the 4th motor generates rotation, turntable
20 center of rotation is overlapped with the centre of sphere of ball seat 203, in this way, generating up and down motion and left and right in the bottom of stirring section 202
When swing, turntable 20 can be such that the end of stirring section 202 is rotated around the axis of stirring cylinder 1 inside stirring cylinder 1, to
So that stirring blade 3 generates spiral helicine stirring track, it is capable of the raising stirring efficiency of further concrete.
The present invention, by the rotation of agitating shaft, makes stirring blade rotate in ready-mixed concrete, and concrete is stirred in realization
Mix, simultaneously as the cam in drive cavity can drive drive link to move up and down, therefore, head cover can with drive link up and down
Movement also generates up and down motion, to make agitating shaft move up and down in mixing drum so that agitating shaft is driving stirring blade turn
While dynamic, also stirring blade is driven to move up and down so that stirring blade to the stirring of concrete evenly, fully, from
And improve the stirring efficiency of concrete.
It should be pointed out that the stirring blade 3 of the present invention should not be too large, the appearance in stirring cylinder 1 on the one hand can be reduced
Quantity space occupies, in the case where ensureing identical capacity, reduce the volume of stirring cylinder 1.On the other hand it is to ensure
Stirring blade 3 will not scratch to the inner wall of stirring cylinder 1, prevent stirring 1 inner wall of cylinder from generating abrasion.The agitating shaft 2 of the present invention
Swing angle depending on the size of stirring blade 3, stirring blade 3 is smaller, and the swing angle of agitating shaft 2 is bigger, similarly, stirs
Mix that blade 3 is bigger, the swing angle of agitating shaft 2 is smaller, and still, in any case, the swing angle of agitating shaft 2 should be less than agitating shaft
2 angle in extreme position.And the length of connecting rod 173, then depending on required swing angle, swing angle is smaller, connecting rod
173 length is shorter, conversely, the length of connecting rod 173 is longer.
Described in upper is only the preferred embodiment of the present invention, it is noted that is come for those of ordinary skill in the art
It says, without departing from the concept of the premise of the invention, various modifications and improvements can be made, these belong to the present invention's
Protection domain.
Claims (7)
1. a kind of concrete mixer, including stirring cylinder(1), the stirring cylinder(1)It is interior to be equipped with agitating shaft(2)With
And it is mounted on agitating shaft(2)On stirring blade(3), stir cylinder(1)Side wall at top be equipped with charge door(4), stir
Mix cylinder(1)Bottom be equipped with discharging assembly(7), it is characterised in that:The stirring cylinder(1)It is monosymmetric be equipped with a pair
Drive cavity(5), stir cylinder(1)Top set there are one head cover(6), two drive cavities(5)Inside it is separately installed with cam
(8), cam(8)Pass through mounting base(9)Mounted on drive cavity(5)Bottom, cam(8)Pass through first motor(10)Driving turns
It is dynamic, the cam(8)Wheel face and horizontal plane, cam(8)Top be fixedly mounted there are one guide holder(11), described to lead
To seat(11)Center be equipped with vertical distribution pilot hole(12), pilot hole(12)Inside it is interspersed with a drive link(13), described
Drive link(13)Bottom pass through idler wheel(24)Rolling is connected to, drive link(13)Top and head cover(6)Bottom fix, two
A cam(8)It rotates synchronously, and two drive links(13)It is synchronous to move up and down;The agitating shaft(2)It is connected to head cover
(6), and agitating shaft(2)Pass through the second motor(14)Driving rotation, the stirring blade(3)Equipped with two groups, two groups of paddles
Piece(3)It is distributed in agitating shaft at vertical type(2)Bottom end.
2. concrete mixer according to claim 1, it is characterised in that:The drive link(13)In pilot hole
(12)With cam(8)Between part set there are one resetting spring(15), the spring(15)One end be fixed on pilot hole
(12)Bottom, the other end is fixed on drive link(13)Shaft on.
3. concrete mixer according to claim 2, it is characterised in that:Two cams(8)By same
One first motor(10)Driving, the first motor(10)It is fixedly mounted on one of drive cavity(5)Outer wall, two institutes
State cam(8)Center of rotation pass through a transmission shaft(16)It links together, transmission shaft(16)Close to first motor(10)'s
One end and first motor(10)Output end connection, the transmission shaft(16)With cam(8)Wheel face it is vertical.
4. concrete mixer according to claim 3, it is characterised in that:The discharging assembly(7)Including unloading
Barrel(701)And it is mounted on discharge tube(701)Interior discharging pump(702), the discharge tube(701)In back taper, discharge tube
(701)Bottom center at be equipped with discharge port(703), the discharging pump(702)Mounted on discharge port(703)Place.
5. concrete mixer according to claim 4, it is characterised in that:The transmission shaft(16)It is laterally interspersed
Discharge tube(701)Both sides side wall, and the transmission shaft(16)With discharge tube(701)Barrel contact position pass through bearing
(704)Connection.
6. concrete mixer according to claim 5, it is characterised in that:The discharge tube(701)Inside
It is transmission shaft(16)Corresponding position is used to accommodate transmission shaft there are one setting(16)Guide cylinder(705), the guide cylinder
(705)Both ends and discharge tube(701)Barrel be linked together, and guide cylinder(705)Internal diameter and transmission shaft(16)Outer diameter
Difference be 3mm, the bearing(704)It is located at guide cylinder(705)Both ends, and bearing(704)With transmission shaft(16)Vertically,
Bearing(704)With guide cylinder(705)Between be equipped with axle envelope, guide cylinder(705)With transmission shaft(16)Between gap filling have profit
Lubricating oil.
7. according to claim 1 ~ 6 any one of them concrete mixer, it is characterised in that:The agitating shaft(2)
Including drive section(201)And stirring section(202), the stirring blade(3)Set on stirring section(202)Bottom, the stirring
Section(202)Top is set there are one ball seat(203), ball seat(203)With stirring section(202)It is linked together setting, the driving
Section(201)Bottom and ball seat(203)Top be linked together, the agitating shaft(2)Pass through ball seat(203)With head cover
(6)Rotation connection, the head cover(6)Be internally provided with a hollow driving chamber(601), the drive section(201)Positioned at drive
Dynamic chamber(601)It is interior, the drive section(201)By being set to driving chamber(601)Interior disk link mechanism(17)Driving, and around circle
Ball seat(203)The centre of sphere rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810317765.6A CN108687959B (en) | 2018-04-10 | 2018-04-10 | Novel concrete stirring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810317765.6A CN108687959B (en) | 2018-04-10 | 2018-04-10 | Novel concrete stirring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108687959A true CN108687959A (en) | 2018-10-23 |
| CN108687959B CN108687959B (en) | 2023-07-04 |
Family
ID=63844939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810317765.6A Active CN108687959B (en) | 2018-04-10 | 2018-04-10 | Novel concrete stirring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108687959B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111015954A (en) * | 2019-12-24 | 2020-04-17 | 深圳市律远汇智科技有限公司 | High-efficient type concrete mixer of misce bene |
| CN112390028A (en) * | 2020-10-16 | 2021-02-23 | 方圆建设集团有限公司 | Construction is with vibrations blanking machine |
| CN118122177A (en) * | 2024-05-07 | 2024-06-04 | 江苏建筑职业技术学院 | Be used for chemical industry catalyst evenly mixed sampling device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111015954A (en) * | 2019-12-24 | 2020-04-17 | 深圳市律远汇智科技有限公司 | High-efficient type concrete mixer of misce bene |
| CN112390028A (en) * | 2020-10-16 | 2021-02-23 | 方圆建设集团有限公司 | Construction is with vibrations blanking machine |
| CN118122177A (en) * | 2024-05-07 | 2024-06-04 | 江苏建筑职业技术学院 | Be used for chemical industry catalyst evenly mixed sampling device |
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| CN108687959B (en) | 2023-07-04 |
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