CN111332749A - Concrete conveying system - Google Patents

Concrete conveying system Download PDF

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Publication number
CN111332749A
CN111332749A CN201911369070.3A CN201911369070A CN111332749A CN 111332749 A CN111332749 A CN 111332749A CN 201911369070 A CN201911369070 A CN 201911369070A CN 111332749 A CN111332749 A CN 111332749A
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China
Prior art keywords
hanging
plate
hanging plate
track
matched
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CN201911369070.3A
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CN111332749B (en
Inventor
汤杰
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Chongqing Zhongke construction technology (Group) Co.,Ltd.
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CHONGQING ZHONGKE CONSTRUCTION (GROUP) CO LTD
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Publication of CN111332749A publication Critical patent/CN111332749A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G47/00Article or material-handling devices associated with conveyors; Methods employing such devices
    • B65G47/34Devices for discharging articles or materials from conveyor 
    • B65G47/38Devices for discharging articles or materials from conveyor  by dumping, tripping, or releasing load carriers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G35/00Mechanical conveyors not otherwise provided for

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

The invention discloses a concrete conveying system, which comprises a track (100) and at least one conveying unit; the conveying unit comprises a cement silo (200); the track (100) is an I-shaped monorail; the cement tank (200) is connected with a hanger (400); the hanger (400) is fixedly connected with at least one hanging crane component (300); each crane component (300) is matched with the track (100); at least one end of the hanger (400) is provided with a first driving connecting part (21); the first drive connection part (21) is connected with a drive mechanism (500). The invention has simple control and lower cost, can run at higher speed and improves the efficiency of a factory; the reliability is high, and the maintenance is convenient; the starting torque is large, the speed regulation range is wide, and the speed is increased quickly during working; the device can well pass through a small-radius track, can be matched with a single-track driving device for use, and is high in bending passing speed; meanwhile, the splashing of cement is reduced, and the fouling of equipment is reduced.

Description

Concrete conveying system
Technical Field
The present invention relates to a conveying system, and more particularly to a conveying system for concrete.
Background
At present, a concrete conveying system of an assembly type building production factory mostly adopts double rails, and a conveying trolley travels on the double rails. The concrete tank of the conveying trolley adopts a large-opening form to accept, discharge and unload materials. The double-track mode has high requirement on the parallelism of double tracks, large occupied space and high construction cost, the turning radius of the curve is large, and the curve speed is very slow to pass the curve; the concrete tank adopts the big opening form, and when blowing and unloading, the concrete splashes seriously, is stained with the concrete everywhere on the dolly, and the clearance is difficult, and the outside is pleasing to the eye, influences the whole image of mill.
On the other hand, the concrete conveying system of the existing assembly type building production factory mostly adopts two driving structure forms, one is double-track driving, namely, the traditional left and right wheel driving is adopted, two sides are required to run synchronously in a straight line, and two sides are required to run in a differential mode in a curved road, so that the control is complex. If a single-rail drive is adopted, the speed reducer is hung on one side, and the friction wheel is uneven in loss and unbalanced in friction force due to the fact that the speed reducer is hung on one side, so that the drive cannot reach an ideal state.
Therefore, those skilled in the art are devoted to developing a concrete conveying system with a small floor space and high applicability.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention provides a concrete conveying system with small floor space and high applicability.
In order to achieve the above object, the present invention provides a concrete conveying system comprising a track and at least one conveying unit; the conveying unit comprises a cement tank; the track is an I-shaped monorail;
the cement tank is connected with the hanger; the hanger is fixedly connected with at least one hanging crane component; each crane component is matched with the track;
at least one end of the hanger is provided with a first driving connecting part; the first driving connecting part is connected with a driving mechanism.
Preferably, the hanging crane component comprises a first hanging plate and a second hanging plate which are positioned on two sides of the track; a first hanging wheel matched with the rail is rotatably arranged on the first hanging plate; a second hanging wheel matched with the rail is rotatably arranged on the second hanging plate; the first hanging plate and the second hanging plate are connected into an integral structure through a first stud nut; the lower ends of the first hanging plate and the second hanging plate are provided with brackets, the brackets are fixed between the first hanging plate and the second hanging plate through second stud nuts, the brackets are in rolling connection with the connecting shafts through rolling bearings, and the lower ends of the connecting shafts penetrate through the hanging bracket and then are matched with the nuts.
In order to turn over the cement tank, a first bracket and a second bracket are fixed on the lower surface of the hanger, which is far away from the track, at intervals; a first suspension wheel and a second suspension wheel which are oppositely arranged are fixed on the second bracket and the second bracket;
the surface of the cement tank is provided with a turnover rib with an arc-shaped overall appearance; the cross section of the overturning rib is I-shaped; the turnover rib is matched with the first suspension wheel and the second suspension wheel;
the hanger is a gantry hanger; a first overturning shaft and a second overturning shaft are respectively arranged on two end faces of the cement tank; the first overturning shaft and the second overturning shaft are supported on the hanging bracket;
one side of the hanger is provided with an electric control system, and the other side of the hanger is provided with a turnover mechanism; the output end of the turnover mechanism is connected with the corresponding turnover shaft; the electric control system is electrically connected with a motor of the turnover mechanism.
In order to facilitate material receiving and discharging, the cement tank is provided with a protruding material receiving and discharging opening.
Preferably, the material receiving and discharging opening consists of a first plate, a second plate, a third plate, a fourth plate and five plates which are sequentially connected end to end; the third plate is rectangular; the first plate and the fifth plate are triangles symmetrically arranged on two sides of the third plate; the second plate and the fourth plate are trapezoids symmetrically arranged on two sides of the third plate. And the included angle between the third plate and the cement tank body is an acute angle.
Preferably, the driving mechanism comprises a hanging load-bearing vehicle; a hub motor is arranged in the hanging bearing vehicle; a friction wheel is arranged on the surface of a hub of the hub motor; the friction wheel is matched with the lower surface of the track.
And the front end and/or the rear end of the hanging bearing vehicle are/is provided with a second driving connecting part connected with the first driving connecting part.
Preferably, the hanging load-bearing vehicle comprises a third hanging plate and a fourth hanging plate which are positioned at two sides of the track; a third hanging wheel matched with the rail is rotatably arranged on the third hanging plate; a fourth hanging wheel matched with the track is rotatably arranged on the fourth hanging plate; the third hanging plate and the fourth hanging plate are connected into an integral structure through a third stud nut;
the hub motor is arranged between the third hanging plate and the fourth hanging plate;
the second driving connection part is arranged at the end parts of the third hanging plate and the fourth hanging plate.
In order to adjust the friction force between the friction wheel and the rail, the front part and the rear part of the third hanging plate and the fourth hanging plate are respectively provided with a first suspension and a second suspension; the hub motor is connected with the mounting frame; the mounting rack is connected with the first suspension and the second suspension through an adjusting screw and an adjusting nut; and a pressing force adjusting spring is arranged between the lower surface of the adjusting nut and the upper surfaces of the first suspension and the second suspension.
The side wall of the mounting rack is provided with a guide block; a guide groove matched with the guide block is formed in the third hanging plate and/or the fourth hanging plate;
and a guard plate is arranged at the position of the third hanging plate and/or the fourth hanging plate corresponding to the guide groove.
In order to facilitate the feedback of the stroke of the concrete conveying system and the control, an electrically-controlled encoder is arranged at the end part of the hanging bracket and used for stroke counting.
The invention has the beneficial effects that: the invention has simple control and lower cost, can run at higher speed and in a single track, and improves the efficiency of a factory; the reliability is high, and the maintenance is convenient; when in work, the starting torque is large, the speed regulation range is wide, the speed is quickly improved, and the small-radius track can be well passed; meanwhile, the splashing of cement is reduced, and the fouling of equipment is reduced.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a front view schematically showing the structure of fig. 1.
Fig. 3 is an enlarged schematic view of the structure at F in fig. 2.
Fig. 4 is a schematic perspective view of a conveying unit according to an embodiment of the present invention.
Fig. 5 is a schematic front view of the structure of fig. 4.
Fig. 6 is a schematic top view of the structure of fig. 4.
Fig. 7 is a rear view of the structure of fig. 4.
Fig. 8 is a left side view of the structure of fig. 4.
Fig. 9 is a schematic perspective view of a transfer unit with a cement silo removed, according to an embodiment of the present invention.
Fig. 10 is a schematic front view of the structure of fig. 9.
Fig. 11 is a partial enlarged view at I in fig. 10.
Fig. 12 is a left side view of the structure of fig. 10.
Fig. 13 is a partial enlarged view at II in fig. 12.
Figure 14 is a partial cross-sectional schematic view of a hoist assembly coupled to a hitch shaft according to the present invention.
Fig. 15 is a schematic sectional view in the direction of E-E in fig. 14.
Fig. 16 is a schematic top view of the structure of fig. 10.
Fig. 17 is a schematic structural view of a cement tank according to an embodiment of the present invention.
Fig. 18 is a partial enlarged view at IV in fig. 17.
Fig. 19 is a schematic front view of the structure of fig. 17.
Fig. 20 is a schematic top view of the structure of fig. 17.
Fig. 21 is a left side view of the structure of fig. 17.
Fig. 22 is a schematic perspective view of a driving mechanism according to an embodiment of the present invention.
Fig. 23 is a perspective view of fig. 22 with the housing removed and before the first suspension.
Fig. 24 is a front view schematic diagram of fig. 22.
Fig. 25 is a left side view of the structure of fig. 23.
Fig. 26 is an enlarged schematic view of fig. 25 at II.
Fig. 27 is a schematic top view of the structure of fig. 22.
FIG. 28 is a schematic view of the operation of the driving mechanism according to an embodiment of the present invention.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
as shown in fig. 1 to 28, a concrete transfer system includes a track 100 and at least one transfer unit including a cement silo 200. The track 100 is an i-shaped monorail.
The cement silo 200 is connected to a hanger 400, the hanger 400 is fixedly connected to two trolley assemblies 300, and each trolley assembly 300 is engaged with the rail 100.
Both ends of the hanger 400 are provided with first driving connection parts 21, and the first driving connection parts 21 are connected with the driving mechanism 500.
The hoist assembly 300 includes first and second clevis plates 1 and 2 located at both sides of the rail 100. The first hanging plate 1 is rotatably provided with a first change gear 3 matched with the track 100, and the second hanging plate 2 is rotatably provided with a second change gear 4 matched with the track 100. The first hanging plate 1 and the second hanging plate 2 are connected into an integral structure through a first stud nut 5. The lower ends of the first hanging plate 1 and the second hanging plate 2 are provided with a bracket 38, the bracket 38 is fixed between the first hanging plate 1 and the second hanging plate 2 through a second stud nut 6, the bracket 38 is in rolling connection with the connecting shaft 7 through a rolling bearing 39, and the lower end of the connecting shaft 7 is matched with a nut 8 after passing through the hanging bracket 400.
Two suspension assemblies are fixed on the lower surface of the hanger 400, which faces away from the rail 100, at intervals, and each suspension assembly comprises a first support 9 and a second support 10 which are arranged at intervals, and a first suspension wheel 11 and a second suspension wheel 12 which are oppositely arranged are fixed on the second supports 9 and 10.
The surface of the cement tank 200 is provided with a turnover rib 13 corresponding to the suspension component, the whole appearance of the turnover rib is arc-shaped, and the cross section of the turnover rib is I-shaped. The turnover rib 13 cooperates with the first suspension wheel 11 and the second suspension wheel 12.
The hanger 400 is a gantry type hanger. The two end faces of the cement silo 200 are respectively provided with a first overturning shaft 14 and a second overturning shaft 15, and the first overturning shaft 14 and the second overturning shaft 15 are supported on the hanger 400.
One side of the hanger 400 is provided with an electric control system 700, and the other side is provided with a turnover mechanism 600; the output end of the turnover mechanism 600 is connected with the corresponding turnover shaft; the electronic control system 700 is electrically connected to the motor 601 of the turnover mechanism 600. Therefore, the weight of the cement tank is borne by the suspension wheels, and the overturning shaft is only used for overturning, so that the problem that the shaft is easy to bend and deform is thoroughly solved.
The cement tank 200 is provided with a protruded material receiving and discharging opening 201, the material receiving and discharging opening 201 is composed of a first plate 16, a second plate 17, a third plate 18, a fourth plate 19 and a fifth plate 20 which are sequentially connected end to end, the third plate 18 is rectangular, the first plate 16 and the fifth plate 20 are triangles symmetrically arranged at two sides of the third plate 18, the second plate 17 and the fourth plate 19 are trapezoids symmetrically arranged at two sides of the third plate 18, and an included angle α between the third plate 18 and the cement tank 200 is an acute angle.
The driving mechanism 500 comprises a hanging bearing vehicle 501, a hub motor 27 is arranged in the hanging bearing vehicle 501, a friction wheel 34 is arranged on the surface of a hub of the hub motor 27, and the friction wheel 34 is matched with the lower surface of the track 100. The hub motor 27 can be driven and controlled by a direct current driver, so that the starting torque is large, the speed regulation range is wide, and the speed is increased quickly.
The front end and the rear end of the suspended vehicle 501 are provided with second drive connection portions 37 connected to the first drive connection portions 21.
The hanging bearing vehicle 501 comprises a third hanging plate 22 and a fourth hanging plate 23 which are positioned at two sides of the track 100, a third hanging wheel 24 matched with the track 100 is rotatably arranged on the third hanging plate 22, and a fourth hanging wheel 25 matched with the track 100 is rotatably arranged on the fourth hanging plate 23. The third hanging plate 22 and the fourth hanging plate 23 are connected into an integral structure through a third stud nut 26.
The hub motor 27 is disposed between the third link plate 22 and the fourth link plate 23. The second driving connection portion 37 is provided at the end portions of the third and fourth link plates 22 and 23. The second driving connecting portion 37 and the first driving connecting portion 21 are connected to each other and provided with a connecting rod 41 structure, and the two connecting rods 41 are fixed by screws. The drive mechanism can thus drag or push the transport unit into motion.
The front and rear portions of the third and fourth link plates 22 and 23 are provided with first and second suspensions 28 and 29, respectively. The hub motor 27 is connected to a mounting bracket 30, and the mounting bracket 30 is connected to the first suspension 28 and the second suspension 29 through an adjusting screw 31 and an adjusting nut 32. An adjustment spring 33 is provided between the lower surface of the adjustment nut 32 and the upper surfaces of the first and second suspensions 28 and 29.
The side wall of the mounting frame 30 is provided with a guide block 42, and the third hanging plate 22 and the fourth hanging plate 23 are provided with a guide groove 35 matched with the guide block 42. Guard plates 36 are arranged at the positions of the third hanging plate 22 and the fourth hanging plate 23 corresponding to the guide grooves 35.
The end of the hanger is provided with an electrically controlled encoder 40, and the encoder 40 is used for stroke counting, so that the stroke of the concrete conveying system can be fed back conveniently, and the control is facilitated.
When the concrete conveying system works, the electric control system 700 is operated to drive the direct current driver to control the hub motor 27 to rotate, so that the friction wheel and the lower surface of the track generate a friction wheel, and the driving mechanism 500 obtains forward power to push or drag the conveying unit to move forward. During the curve, the hanger 400 can rotate freely along the track direction through the connecting shaft 7.
And after the cement tank is conveyed to the right position, controlling the hub motor 27 to stop rotating, and pouring cement into the cement tank 200.
When the cement is required to be poured out, the electric control system 700 is operated to enable the motor 601 of the turnover mechanism 600 to act and drive the speed reducer 602, so that the turnover shaft rotates to pour out the cement. The cement silo 200 is turned over by the forward and reverse rotation of the speed reducer 602. Because the driving mechanism 500 is an independent single body, if a fault occurs, the whole can be replaced quickly, and the equipment is convenient and quick to maintain.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims (10)

1. A concrete conveying system comprising a track (100) and at least one conveying unit; the conveying unit comprises a cement silo (200); the method is characterized in that: the track (100) is an I-shaped monorail;
the cement tank (200) is connected with a hanger (400); the hanger (400) is fixedly connected with at least one hanging crane component (300); each hanging crane component (300) is matched with the track (100);
at least one end of the hanger (400) is provided with a first driving connecting part (21); the first drive connection part (21) is connected with a drive mechanism (500).
2. The concrete delivery system of claim 1 wherein: the hanging crane component (300) comprises a first hanging plate (1) and a second hanging plate (2) which are positioned on two sides of the track (100); a first hanging wheel (3) matched with the track (100) is rotatably arranged on the first hanging plate (1); a second hanging wheel (4) matched with the track (100) is rotatably arranged on the second hanging plate (2); the first hanging plate (1) and the second hanging plate (2) are connected into an integral structure through a first stud nut (5);
the lower ends of the first hanging plate (1) and the second hanging plate (2) are provided with brackets (38); the bracket (38) is fixed between the first hanging plate (1) and the second hanging plate (2) through a second stud nut (6); the bracket (38) is in rolling connection with the connecting shaft (7) through a rolling bearing (39), and the lower end of the connecting shaft (7) penetrates through the hanging bracket (400) and then is matched with the nut (8).
3. The concrete delivery system of claim 1 wherein: the hanger (400) is away from the lower surface of the rail (100) and fixes a first bracket (9) and a second bracket (10) at intervals; a first suspension wheel (11) and a second suspension wheel (12) which are oppositely arranged are fixed on the second bracket (9) and the second bracket (10);
the surface of the cement tank (200) is provided with a turnover rib (13) with an arc-shaped overall appearance; the cross section of the turnover rib (13) is I-shaped; the turning rib (13) is matched with the first suspension wheel (11) and the second suspension wheel (12);
the hanger (400) is a gantry hanger; a first overturning shaft (14) and a second overturning shaft (15) are respectively arranged on two end faces of the cement tank (200); the first overturning shaft (14) and the second overturning shaft (15) are supported on the hanging bracket (400);
an electric control system (700) is arranged on one side of the hanging bracket (400), and a turnover mechanism (600) is arranged on the other side of the hanging bracket; the output end of the turnover mechanism (600) is connected with the corresponding turnover shaft; the electric control system (700) is electrically connected with a motor of the turnover mechanism (600).
4. The concrete delivery system of claim 3 wherein: the cement tank (200) is provided with a protruding material receiving and discharging opening (201).
5. The concrete conveying system according to claim 4, wherein the material receiving and discharging opening (201) is composed of a first plate (16), a second plate (17), a third plate (18), a fourth plate (19) and a fifth plate (20) which are sequentially connected end to end, the third plate (18) is rectangular, the first plate (16) and the fifth plate (20) are triangular and symmetrically arranged on two sides of the third plate (18), the second plate (17) and the fourth plate (19) are trapezoidal and symmetrically arranged on two sides of the third plate (18), and an included angle (α) formed by the third plate (18) and the cement tank (200) is an acute angle.
6. A concrete delivery system as claimed in any one of claims 1 to 5, wherein: the driving mechanism (500) comprises a hanging bearing vehicle (501); a hub motor (27) is arranged in the hanging bearing vehicle (501); a friction wheel (34) is arranged on the surface of a hub of the hub motor (27); the friction wheel (34) is matched with the lower surface of the track (100);
the front end and/or the rear end of the hanging load-bearing vehicle (501) are/is provided with a second driving connecting part (37) connected with the first driving connecting part (21).
7. The concrete delivery system of claim 6 wherein: the hanging and hanging bearing vehicle (501) comprises a third hanging plate (22) and a fourth hanging plate (23) which are positioned on two sides of the track (100); a third hanging wheel (24) matched with the track (100) is rotatably arranged on the third hanging plate (22); a fourth hanging wheel (25) matched with the track (100) is rotatably arranged on the fourth hanging plate (23); the third hanging plate (22) and the fourth hanging plate (23) are connected into an integral structure through a third stud nut (26);
the hub motor (27) is arranged between the third hanging plate (22) and the fourth hanging plate (23);
the second driving connecting part (37) is arranged at the end parts of the third hanging plate (22) and the fourth hanging plate (23).
8. The concrete delivery system of claim 7 wherein: the front part and the rear part of the third hanging plate (22) and the fourth hanging plate (23) are respectively provided with a first suspension (28) and a second suspension (29); the hub motor (27) is connected with the mounting frame (30); the mounting frame (30) is connected with the first suspension (28) and the second suspension (29) through an adjusting screw rod (31) and an adjusting nut (32); an adjusting spring (33) is arranged between the lower surface of the adjusting nut (32) and the upper surfaces of the first suspension (28) and the second suspension (29).
9. The concrete delivery system of claim 8 wherein: the side wall of the mounting rack (30) is provided with a guide block (42); a guide groove (35) matched with the guide block (42) is formed in the third hanging plate (22) and/or the fourth hanging plate (23);
and a guard plate (36) is arranged at the position of the third hanging plate (22) and/or the fourth hanging plate (23) corresponding to the guide groove (35).
10. The concrete delivery system of claim 1 wherein: an encoder (40) for electric control is arranged at the end part of the hanger (400); the encoder (40) is used for stroke counting.
CN201911369070.3A 2019-12-26 2019-12-26 Concrete conveying system Active CN111332749B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911369070.3A CN111332749B (en) 2019-12-26 2019-12-26 Concrete conveying system

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Application Number Priority Date Filing Date Title
CN201911369070.3A CN111332749B (en) 2019-12-26 2019-12-26 Concrete conveying system

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CN111332749A true CN111332749A (en) 2020-06-26
CN111332749B CN111332749B (en) 2021-12-10

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2663116Y (en) * 2003-07-04 2004-12-15 孙亮枝 Tumbling hoist for producing aeroconcrete
US20120291917A1 (en) * 2011-05-17 2012-11-22 Csaba Bera Method, system, and apparatus for directing fluid flow
CN203651562U (en) * 2013-12-18 2014-06-18 商庆申 Automatic overall loading and unloading vehicle
CN104960082A (en) * 2015-07-02 2015-10-07 张波 Traction trolley driven transport hopper
CN206951811U (en) * 2017-07-14 2018-02-02 无锡丰元新材料科技有限公司 Portable steel coil strip bag tilting machine
CN108356685A (en) * 2018-04-20 2018-08-03 象山通大机械制造有限公司 A kind of surface polishing system and its polishing method
CN108979159A (en) * 2018-09-11 2018-12-11 河北新大地机电制造有限公司 A kind of lower traveling appts. for transferring ready-mixed concrete
CN208557908U (en) * 2018-06-29 2019-03-01 张超 A kind of construction concrete mixer

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2663116Y (en) * 2003-07-04 2004-12-15 孙亮枝 Tumbling hoist for producing aeroconcrete
US20120291917A1 (en) * 2011-05-17 2012-11-22 Csaba Bera Method, system, and apparatus for directing fluid flow
CN203651562U (en) * 2013-12-18 2014-06-18 商庆申 Automatic overall loading and unloading vehicle
CN104960082A (en) * 2015-07-02 2015-10-07 张波 Traction trolley driven transport hopper
CN206951811U (en) * 2017-07-14 2018-02-02 无锡丰元新材料科技有限公司 Portable steel coil strip bag tilting machine
CN108356685A (en) * 2018-04-20 2018-08-03 象山通大机械制造有限公司 A kind of surface polishing system and its polishing method
CN208557908U (en) * 2018-06-29 2019-03-01 张超 A kind of construction concrete mixer
CN108979159A (en) * 2018-09-11 2018-12-11 河北新大地机电制造有限公司 A kind of lower traveling appts. for transferring ready-mixed concrete

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