CN110904792B - An electro-hydraulic controlled leveling device and a concrete slipform paver - Google Patents
An electro-hydraulic controlled leveling device and a concrete slipform paver Download PDFInfo
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- CN110904792B CN110904792B CN202010017525.1A CN202010017525A CN110904792B CN 110904792 B CN110904792 B CN 110904792B CN 202010017525 A CN202010017525 A CN 202010017525A CN 110904792 B CN110904792 B CN 110904792B
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- trowelling
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- 239000003921 oil Substances 0.000 claims description 16
- 239000010720 hydraulic oil Substances 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 210000001503 joint Anatomy 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/48—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
- E01C19/4866—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ with solely non-vibratory or non-percussive pressing or smoothing means for consolidating or finishing
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Machines (AREA)
Abstract
An electrohydraulic control trowelling device and a concrete slipform paver relate to the technical field of concrete slipform pavers. The concrete road trowelling device comprises a transversely arranged truss, a track arranged on the truss along the length direction, a walking trolley travelling along the track, and a travelling driving mechanism driving the walking trolley to travel along the track, wherein an upper hinge frame arranged vertically is arranged on the walking trolley, the upper end of the upper hinge frame is rotatably arranged on the walking trolley, the lower end of the upper hinge frame is hinged with a trowelling mechanism, and a trowelling driving mechanism driving the upper hinge frame to drive the trowelling mechanism to trowelle a concrete road surface is arranged on the walking trolley. The invention is arranged on the concrete slipform paver to work, and the concrete pavement can be automatically smoothed simultaneously by matching the concrete slipform paver with the walking driving mechanism for driving the walking trolley to walk, so that the labor cost is saved, and the construction efficiency is improved.
Description
Technical Field
The invention relates to the technical field of concrete slipform pavers, in particular to an electrohydraulic control trowelling device and a concrete slipform paver.
Background
In the construction process of the concrete slipform paver, the formed concrete pavement is inevitably provided with defects such as pitted surface, longitudinal unevenness, bubble slurry and the like, the existing treatment method is to manually treat the concrete pavement by using a trowel, but people cannot stand on the newly paved concrete pavement, the middle position of the pavement is not free to reach, one method is to use an lengthened large trowel, the length is determined according to the width of the paved pavement, and the other method is to put a bridge crossing the concrete pavement, and the people stand on the bridge to bend over. The efficiency of both manual treatments is relatively low, which affects the construction progress.
Disclosure of Invention
One of the purposes of the invention is to provide an electrohydraulic control trowelling device arranged on a concrete slipform paver, through which the concrete surface can be automatically trowelled, the labor cost is saved, and the construction efficiency is improved.
The technical scheme for achieving the purpose is as follows: an electrohydraulic control trowelling device for a concrete slipform paver, characterized in that: the concrete road trowelling device comprises a transversely arranged truss, a track arranged on the truss along the length direction, a walking trolley travelling along the track, and a travelling driving mechanism driving the walking trolley to travel along the track, wherein an upper hinge frame arranged vertically is arranged on the walking trolley, the upper end of the upper hinge frame is rotatably arranged on the walking trolley, the lower end of the upper hinge frame is hinged with a trowelling mechanism, and a trowelling driving mechanism driving the upper hinge frame to drive the trowelling mechanism to trowelle a concrete road surface is arranged on the walking trolley.
The invention has the beneficial effects that:
The invention is arranged on the concrete slipform paver to work, and the concrete pavement can be automatically smoothed simultaneously by matching the concrete slipform paver with the walking driving mechanism for driving the walking trolley to walk, so that the labor cost is saved, and the construction efficiency is improved.
Further, the trowelling mechanism comprises a trowelling plate, a middle hinge frame and two lower hinge frames, wherein the trowelling plate is longitudinally arranged below the truss, one end of one lower hinge frame is hinged to one end of the back of the trowelling plate, one end of the other lower hinge frame is hinged to the other end of the back of the trowelling plate, the two lower hinge frames are symmetrically arranged, the middle hinge frame is hinged between the two lower hinge frames, and the lower end of the upper hinge frame is hinged to the middle of the middle hinge frame.
Further, the trowelling driving mechanism comprises auxiliary driving motors which are transversely arranged and mounted on the travelling trolley, the output ends of the auxiliary driving motors are connected with turntables, connecting rods are connected between the turntables and the upper hinge frames, one ends of the connecting rods are rotatably connected to the turntables, the other ends of the connecting rods are hinged to the middle parts of the upper hinge frames, and one ends of the connecting rods, which are connected with the turntables, are eccentrically arranged relative to the rotation center of the turntables.
The auxiliary driving motor drives the upper hinge frame to swing back and forth through the connecting rod, and drives the screeding plate to move back and forth through the middle hinge frame and the two lower hinge frames.
Further, in order to avoid the damage of hydraulic oil conveying rubber tube and knot in the running process of the walking trolley, a winder support is arranged in the middle of the truss, a winder is rotatably arranged on the winder support, and two hydraulic oil conveying rubber tubes connected with the auxiliary driving motor are wound on the winder.
Further, in order to avoid the pulling force that produces the link of hydraulic oil transportation rubber tube in the walking of walking dolly, cause the link not hard up, still install the rubber tube balance on the walking dolly, the rubber tube balance is the cylinder, is provided with two hydraulic joint in the rubber tube balance, and the rubber tube balance is all exposed at two ends of two hydraulic joints, two hydraulic oil transportation rubber tubes are connected pair driving motor through a hydraulic joint respectively.
Further, the walking driving mechanism comprises a driving seat frame arranged in the middle of the truss and a cable driving wheel rotatably arranged on the driving seat frame, a main driving motor for driving the cable driving wheel to rotate is further arranged on the driving seat frame, a driving cable is wound on the cable driving wheel, wire wheels are further arranged at two ends of the truss respectively, and two ends of the driving cable are connected with the walking trolley after respectively bypassing the wire wheels at the corresponding ends.
According to the invention, the driving cable is driven to rotate forward or reversely, so that the two ends of the driving cable are driven to be automatically retracted and released, and the travelling trolley is controlled to move left and right along the track.
Further, be provided with the vertically upward connecting plate on the travelling trolley, worn to put two transversely arranged cable dead levers on the connecting plate, connect in parallel the nut on the cable dead lever of connecting plate both sides respectively, two cable dead levers one of which all is connected with the rope loop, and the rope loop is located the opposite end of two cable dead levers.
According to the invention, through the nuts at the two sides of the connecting plate, the axial position of the cable fixing rod can be adjusted, so that the tension of the driving cable can be adjusted.
Further, the both sides of truss are connected with fixed connection frame, fixed connection frame includes the lead screw lift, and the lower extreme liftable of lead screw lift is connected with the lifting seat, lifting seat and truss fixed connection, have the fixed mounting panel that is used for being connected with the slipform paver through leg joint on the casing of lead screw lift.
The trowelling device is arranged on the slipform paver through a screw rod lifter with adjustable height so as to adapt to the pavement with different heights.
Further, a transverse movement electrohydraulic control system is further arranged on the truss and comprises a controller, an electric control reversing valve, a speed regulating valve and two travel switches, wherein the two travel switches are respectively arranged at two ends of a track and used for controlling the travel of a traveling trolley, the two travel switches are connected to the input end of the controller, the control end of the electric control reversing valve is connected to the output end of the controller, a main driving motor is connected between working oil ports A, B of the electric control reversing valve, a pressure oil port P of the electric control reversing valve and an oil return port T of the electric control reversing valve are connected with a hydraulic oil supply system of the concrete slipform paver, and the speed regulating valve is connected in series with the pressure oil port P of the electric control reversing valve and the oil supply system.
Working principle of transverse movement electrohydraulic control system: the travel switch controls the electric control reversing valve to reverse through the controller after the travel switch at one end is triggered, so that the main driving motor is controlled to rotate in the opposite direction, the travel trolley is controlled to travel to the other end, and the travel trolley is enabled to travel in a circulating and reciprocating mode along the track.
Another object of the invention is to provide a concrete slipform paver equipped with an electrohydraulic control screeding device as described above.
Drawings
FIG. 1 is a schematic diagram of a trowelling apparatus;
FIG. 2 is a front view of the trowelling device;
FIG. 3 is a schematic view of the structure of the travelling carriage;
FIG. 4 is a schematic view of a travel drive mechanism;
FIG. 5 is a schematic structural view of a fixed connection frame;
FIG. 6 is a schematic diagram of a lateral movement electro-hydraulic control device;
FIG. 7 is a schematic view of the construction of the trowelling device mounted on a concrete slipform paver in a mold;
fig. 8 is a schematic structural view of the trowelling device installed on a concrete slipform paver with a rear die.
Detailed Description
As shown in fig. 1-6, the invention discloses an electrohydraulic control trowelling device 30 for a concrete slipform paver, which comprises a transversely arranged truss 1 and a traveling trolley 3, wherein rails 2 arranged along the length direction are arranged on two sides of the truss 1, the traveling trolley 3 is slidably arranged on the rails 2 through traveling wheels 33, and a traveling driving mechanism 4 for driving the traveling trolley 3 to travel along the rails 2 and a transversely moving electrohydraulic control system 26 are arranged on the truss 1.
The truss 1 comprises a basic section 1.1 and mechanical lengthening sections 1.2 connected to two ends of the basic section 1.1, wherein connecting plates 1.3 are fixedly connected to the two ends of the mechanical lengthening sections 1.2 and the two ends of the basic section 1.1, the connecting plates 1.3 between the basic section 1.1 and the mechanical lengthening sections 1.2 are mutually adhered and fixed through the bolts, the mechanical lengthening sections 1.2 can be divided into various length specifications, and the mechanical lengthening sections 1.2 are connected to two ends of the basic section 1.1 in a matched mode according to the width requirement of a paving road surface.
The walking trolley 3 is provided with an upper hinge frame 5 which is vertically arranged, the upper end of the upper hinge frame 5 is rotatably arranged on the walking trolley 3 through a rotating shaft 6 which is transversely arranged, the lower end of the upper hinge frame 5 is hinged with a screeding mechanism 7, the screeding mechanism 7 comprises a screeding plate 7.1, a middle hinge frame 7.2 and two lower hinge frames 7.3, the screeding plate 7.1 is longitudinally arranged below the truss 1, one end of one lower hinge frame 7.3 is hinged with one end of the back surface of the screeding plate 7.1 (namely, the opposite surface of the working surface of the screeding plate), one end of the other lower hinge frame 7.3 is hinged with the other end of the back surface of the screeding plate 7.1, the two lower hinge frames 7.3 are symmetrically arranged, two ends of the middle hinge frame 7.2 are hinged between the two lower hinge frames 7.3, and the lower end of the upper hinge frame 5 is hinged with the middle part of the middle hinge frame 7.2.
The trowelling driving mechanism 8 for driving the trowelling mechanism 7 to trowelle a concrete pavement is arranged on the traveling trolley 3, the trowelling driving mechanism 8 comprises auxiliary driving motors 8.1 which are transversely arranged and arranged on the traveling trolley 3, the output ends of the auxiliary driving motors 8.1 are connected with rotary tables 8.2, connecting rods 8.3 are connected between the rotary tables 8.2 and the upper hinge frame 5, one ends of the connecting rods 8.3 are rotatably connected to the rotary tables 8.2, the other ends of the connecting rods are hinged to the middle parts of the upper hinge frames, and one ends of the connecting rods 8.3 connected with the rotary tables 8.2 are eccentrically arranged relative to the rotation center of the rotary tables 8.2.
The middle part of truss 1 installs winder support 9, rotates on the winder support 9 and installs automatic winder 11, and automatic winder 11 goes up to wind to put two hydraulic oil conveying rubber pipes 28 that are connected with auxiliary drive motor 8.1, still fixed mounting has rubber pipe balance 10 on the travelling car 3, and rubber pipe balance 10 is the cylinder, is provided with two hydraulic joint 29 in the rubber pipe balance 10, and rubber pipe balance 10 is all exposed at two hydraulic joint 29's both ends, two hydraulic oil conveying rubber pipes 28 connect auxiliary drive motor 8.1 through a hydraulic joint 29 respectively.
The walking driving mechanism 4 comprises a driving seat frame 13, a cable driving wheel 14 and a main driving motor 15, the driving seat frame 12 is longitudinally arranged in the middle of the truss 1, two ends of the cable driving wheel 14 are arranged on the driving seat frame 13 through bearings, the main driving motor 15 is arranged on the driving seat frame 12 and is in transmission connection with the cable driving wheel 14, a driving cable 16 is wound on the cable driving wheel 14, two ends of the truss 1 are respectively provided with a wire wheel 12, and two ends of the driving cable 16 are respectively connected with the walking trolley 3 after respectively bypassing the wire wheels 12 at corresponding ends.
As a further improvement of the embodiment, the traveling trolley 3 is provided with a vertically upward connecting plate 17, two transversely arranged cable fixing rods 18 are arranged on the connecting plate 17 in a penetrating manner, nuts 19 are respectively connected to the cable fixing rods 18 on two sides of the connecting plate 17 in parallel, one end of each of the two cable fixing rods 18 is integrally provided with a rope ring 20 connected with the driving cable 16, and the rope rings 20 are positioned at opposite ends of the two cable fixing rods 18.
By loosening the nuts 19 on both sides of the connection plate 17, an adjustment of the axial position of the cable fixing lever 18 can be achieved, thereby adjusting the tension of the drive cable 16.
The both sides of truss 1 are connected with a fixed connection frame 21 respectively, and fixed connection frame 21 includes lead screw lift 22, and the lower extreme liftable of lead screw lift 22 is connected with lifting seat 23, lifting seat 23 and truss 1 fixed connection are connected with the fixed mounting panel 25 that sets up backward through support 24 on the casing of lead screw lift 22.
The transverse movement electrohydraulic control system 26 comprises a controller 26.1, an electric control reversing valve 26.2, a speed regulating valve 26.3 and two travel switches 26.4, wherein the two travel switches 26.4 are respectively arranged at two ends of a track 2 and used for controlling the travel of a traveling trolley 3, the controller 26.1 can adopt a singlechip, the two travel switches 26.4 are connected with the input end of the controller 26.1, the control end of the electric control reversing valve 26.2 is connected with the output end of the controller 26.1, a main driving motor 15 is connected between working oil ports A, B of the electric control reversing valve 26.2, a pressure oil port P of the electric control reversing valve 26.2 is connected with an oil supply pump of a hydraulic system 27 of a concrete slipform paver, an oil return port T is connected with an oil tank of the hydraulic system 27 of the concrete slipform paver, and the speed regulating valve 26.3 is connected between the pressure oil port P of the electric control reversing valve 26.2 and the oil supply pump of hydraulic fluid 27 of the concrete slipform paver in series.
Principle of operation of the lateral movement electro-hydraulic control system 26: the travelling trolley 3 is driven to travel along the track 2 by the main driving motor 15, and after a travel switch 26.4 at one end is triggered, the travel switch 26.4 controls the electric control reversing valve 26.2 to reverse through the controller 26.1, so that the main driving motor 15 is controlled to rotate in the opposite direction, the travelling trolley 3 is controlled to travel towards the other end, and the travelling trolley 3 is enabled to travel in a circulating and reciprocating mode along the track 2.
The invention can work on a concrete paver with two structural types, namely a die-in-die type concrete paver and a die-rear type concrete paver, wherein fig. 7 is a structural schematic diagram of the concrete slipform paver 31 arranged in the die, fig. 8 is a structural schematic diagram of the concrete slipform paver 32 arranged in the die-rear type concrete slipform paver, and trowelling devices 30 are fixedly arranged at the rear end of the concrete slipform paver through fixed mounting plates 25 of fixed connecting frames 21.
When the slip form paver works, the slip form paver paves a road surface forwards, meanwhile, the trowelling device 30 is driven to move forwards, meanwhile, the main driving motor 15 drives the travelling trolley 3 to reciprocate left and right along the track 2, in the moving process of the travelling trolley 3, the auxiliary driving motor 8.1 drives the upper hinge frame 5 to swing forwards and backwards around the rotating shaft 6, then the middle hinge frame 7.2 and the two lower hinge frames 7.3 drive the trowelling plate 7.1 to move forwards and backwards, and trowelling operation is carried out on the concrete road surface newly paved by the slip form paver through the forward and backward reciprocating movement of the trowelling plate 7.1.
Claims (5)
1. An electrohydraulic control trowelling device for a concrete slipform paver, characterized in that: the device comprises a transversely arranged truss, a track arranged on the truss along the length direction, a walking trolley travelling along the track, and a travelling driving mechanism driving the walking trolley to travel along the track, wherein an upper hinge frame arranged vertically is arranged on the walking trolley, the upper end of the upper hinge frame is rotatably arranged on the walking trolley, the lower end of the upper hinge frame is hinged with a trowelling mechanism, and a trowelling driving mechanism driving the upper hinge frame to trowelle a concrete pavement is arranged on the walking trolley;
The trowelling mechanism comprises a trowelling plate, a middle hinge frame and two lower hinge frames, wherein the trowelling plate is longitudinally arranged below the truss, one end of one lower hinge frame is hinged to one end of the back of the trowelling plate, one end of the other lower hinge frame is hinged to the other end of the back of the trowelling plate, the two lower hinge frames are symmetrically arranged, the middle hinge frame is hinged between the two lower hinge frames, and the lower end of the upper hinge frame is hinged to the middle part of the middle hinge frame;
The trowelling driving mechanism comprises auxiliary driving motors which are transversely arranged and mounted on the travelling trolley, the output ends of the auxiliary driving motors are connected with turntables, connecting rods are connected between the turntables and the upper hinge frames, one ends of the connecting rods are rotatably connected to the turntables, the other ends of the connecting rods are hinged to the middle parts of the upper hinge frames, and one ends of the connecting rods, which are connected with the turntables, are eccentrically arranged relative to the rotation center of the turntables;
a winder support is arranged in the middle of the truss, a winder is rotatably arranged on the winder support, and two hydraulic oil conveying rubber pipes connected with the auxiliary driving motor are wound on the winder;
The travelling trolley is also provided with a rubber tube balance wheel, the rubber tube balance wheel is a cylinder, two hydraulic joints are arranged in the rubber tube balance wheel, two ends of each hydraulic joint are exposed out of the rubber tube balance wheel, and the two hydraulic oil conveying rubber tubes are connected with a pair of driving motors through one hydraulic joint respectively;
the walking trolley is provided with a vertically upward connecting plate, two transversely arranged cable fixing rods penetrate through the connecting plate, nuts are respectively connected to the cable fixing rods on two sides of the connecting plate in parallel, one end of each of the two cable fixing rods is connected with a rope ring, and the rope rings are located at the opposite ends of the two cable fixing rods; the axial position of the cable fixing rod can be adjusted by loosening nuts on two sides of the connecting plate, so that the tension of the driving cable is adjusted.
2. An electrohydraulic control screeding device for a concrete slipform paver as claimed in claim 1 wherein: the walking driving mechanism comprises a driving seat frame arranged in the middle of the truss and a cable driving wheel rotatably arranged on the driving seat frame, a main driving motor for driving the cable driving wheel to rotate is further arranged on the driving seat frame, a driving cable is wound on the cable driving wheel, wire wheels are further arranged at two ends of the truss respectively, and two ends of the driving cable are connected with the walking trolley after respectively winding the wire wheels at corresponding ends.
3. An electrohydraulic control screeding device for a concrete slipform paver as claimed in claim 1 wherein: the two sides of the truss are connected with fixed connecting frames, the fixed connecting frames comprise screw rod lifters, lifting seats are connected with the lower ends of the screw rod lifters in a lifting manner, the lifting seat is fixedly connected with the truss, and a fixed mounting plate used for being connected with the slipform paver is connected to the shell of the screw rod lifter through a bracket.
4. An electrohydraulic control screeding device for concrete slipform pavers as claimed in claim 2 wherein: the truss is further provided with a transverse movement electrohydraulic control system, the transverse movement electrohydraulic control system comprises a controller, an electric control reversing valve, a speed regulating valve and two travel switches, the two travel switches are respectively arranged at two ends of a track and used for controlling the travel of a traveling trolley, the two travel switches are connected with the input end of the controller, the control end of the electric control reversing valve is connected with the output end of the controller, a main driving motor is connected between working oil ports A, B of the electric control reversing valve, a pressure oil port P and an oil return port T of the electric control reversing valve are connected with a hydraulic oil supply system of the concrete slipform paver, and the speed regulating valve is connected with the pressure oil port P of the electric control reversing valve in series.
5. A concrete slipform paver, characterized in that: the rear end of the slipform paver is connected with the electrohydraulic control trowelling device for the concrete slipform paver according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010017525.1A CN110904792B (en) | 2020-01-08 | 2020-01-08 | An electro-hydraulic controlled leveling device and a concrete slipform paver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010017525.1A CN110904792B (en) | 2020-01-08 | 2020-01-08 | An electro-hydraulic controlled leveling device and a concrete slipform paver |
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| Publication Number | Publication Date |
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| CN110904792A CN110904792A (en) | 2020-03-24 |
| CN110904792B true CN110904792B (en) | 2024-11-15 |
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| CN202010017525.1A Active CN110904792B (en) | 2020-01-08 | 2020-01-08 | An electro-hydraulic controlled leveling device and a concrete slipform paver |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116752400B (en) * | 2023-07-14 | 2025-07-18 | 江苏四明工程机械有限公司 | Adjustable concrete pavement leveling device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208925233U (en) * | 2018-07-04 | 2019-06-04 | 焦作荣利达食品有限公司 | A kind of dilated food oven |
| CN110593060A (en) * | 2019-09-25 | 2019-12-20 | 陈建军 | Movable floating device |
| CN211734970U (en) * | 2020-01-08 | 2020-10-23 | 江苏四明工程机械有限公司 | Electro-hydraulic control trowelling device and concrete slide die paver |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2575142Y (en) * | 2002-10-08 | 2003-09-24 | 陈天明 | Multifunction road-repairing cart |
| US7762144B2 (en) * | 2007-10-23 | 2010-07-27 | Board Of Regents, The University Of Texas System | Method and apparatus to perform profile measurements on wet cement and to report discrepancies |
| CN109701255B (en) * | 2018-12-29 | 2020-06-12 | 青岛农业大学 | Long jump competition venue sand trap automatic leveling device |
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2020
- 2020-01-08 CN CN202010017525.1A patent/CN110904792B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208925233U (en) * | 2018-07-04 | 2019-06-04 | 焦作荣利达食品有限公司 | A kind of dilated food oven |
| CN110593060A (en) * | 2019-09-25 | 2019-12-20 | 陈建军 | Movable floating device |
| CN211734970U (en) * | 2020-01-08 | 2020-10-23 | 江苏四明工程机械有限公司 | Electro-hydraulic control trowelling device and concrete slide die paver |
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