CN111216225A - Underground production system of prefabricated prestressed concrete floor slab - Google Patents
Underground production system of prefabricated prestressed concrete floor slab Download PDFInfo
- Publication number
- CN111216225A CN111216225A CN201811425964.5A CN201811425964A CN111216225A CN 111216225 A CN111216225 A CN 111216225A CN 201811425964 A CN201811425964 A CN 201811425964A CN 111216225 A CN111216225 A CN 111216225A
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- floor slab
- shear wall
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 60
- 239000011513 prestressed concrete Substances 0.000 title claims abstract description 18
- 239000004567 concrete Substances 0.000 claims abstract description 17
- 238000009415 formwork Methods 0.000 claims abstract description 17
- 239000002002 slurry Substances 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 238000005520 cutting process Methods 0.000 claims description 9
- 238000007788 roughening Methods 0.000 claims description 9
- 238000005192 partition Methods 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 5
- 239000011376 self-consolidating concrete Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 210000002435 tendon Anatomy 0.000 claims description 4
- 230000003028 elevating effect Effects 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 claims 2
- 239000000463 material Substances 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 5
- 239000011148 porous material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B15/00—General arrangement or layout of plant ; Industrial outlines or plant installations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
- B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
- B28B23/043—Wire anchoring or tensioning means for the reinforcements
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention discloses an underground production system of a prefabricated prestressed concrete floor slab, which comprises one or more subsystems arranged underground, wherein each subsystem consists of a three-dimensional mould platform system and a floor slab transportation system; the three-dimensional mould platform system comprises an underground shear wall, a plurality of layers of mould platforms and a transverse wall; the multi-layer mould tables are cantilevered on two sides of the underground shear wall through the cantilever beams, a movable type napping machine is mounted on each layer of mould table, and the movable type napping machine can move and nappe longitudinally along the mould tables to achieve napping in the production process of the prefabricated floor slab on each layer of mould table; a concrete conveying pipeline is laid above each layer of the formwork table, a slurry inlet and a slurry outlet are formed in the concrete conveying pipeline, and the slurry inlet is connected with a grouting device to realize grouting into the formwork; the transverse walls are arranged at two ends of the underground shear wall and are vertical to the underground shear wall; the floor transportation system is arranged on one side or two sides of the three-dimensional mould platform system and used for transporting the cut floors.
Description
Technical Field
The invention relates to the technical field of prefabricated parts, in particular to an underground production system for prefabricated prestressed concrete floors.
Background
The technical scheme is characterized in that a bench formwork (namely a working platform) flows to stations corresponding to each procedure through a conveying system of the production line according to a certain process sequence, the stations finish the placement of a mold on a mold platform, the material is distributed into the mold through a material distribution device, the concrete in the mold is vibrated and compacted through the vibration device, then the maintenance is carried out, and the mold is disassembled and lifted after the maintenance is finished. The defect of the patent lies in that the required space is large, the space utilization rate is low, and frequent formwork supporting and formwork removing are needed, and the production efficiency is low.
The patent is named as "an underground precuring storehouse and contains prefabricated component production system in this underground precuring storehouse", and the patent that patent number is 201520189715.6 shifts out the precuring station position on the prefab production line with the precuring station, need not occupy the station on the assembly line, reduces the quantity of station on the assembly line, can reduce the length of factory building like this, reduces the area of factory building promptly, practices thrift factory building construction cost. The technical method has the disadvantages that the maintenance system pre-maintenance station is only moved out of the station position on the prefabricated part production line to reduce the length of the plant so as to reduce the floor area of the plant, and the effect is not obvious; and the underground space is not fully utilized, and the effective space of a factory building is not fully improved.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a three-dimensional production system for a prefabricated floor slab, which integrates underground pouring, maintenance, cutting and transportation. Meanwhile, the invention designs an underground structure containing system corresponding to the production system, and the technical scheme can greatly improve the effective production space of the factory building, thereby improving the utilization rate of the factory building.
The technical scheme adopted by the invention is as follows:
an underground production system of a prefabricated prestressed concrete floor slab comprises one or more subsystems arranged underground, wherein each subsystem consists of a three-dimensional mould platform system and a floor slab transportation system;
the three-dimensional mould platform system comprises an underground shear wall, a plurality of layers of mould platforms and a transverse wall; the multi-layer mould tables are cantilevered on two sides or one side of the underground shear wall through cantilever beams, a movable roughening machine is mounted on each layer of mould table, and the movable roughening machine can move and roughen along the longitudinal direction of the mould tables to achieve roughening in the production process of the prefabricated floor slab on each layer of mould table; concrete conveying pipelines are laid above each layer of mould platform, and are provided with slurry inlets and slurry outlets, wherein the slurry inlets are used for being connected with a grouting device to realize grouting into the template; the transverse walls are arranged at two ends of the underground shear wall and are vertical to the underground shear wall;
the floor slab transportation system is arranged on one side or two sides of the three-dimensional mould platform system and used for transporting the cut floor slabs.
Further, floor transportation system include floor place the platform, elevating system and grabbing device, floor place the platform be used for placing the floor, elevating system make floor place the platform go up and down to required mould platform height, grabbing device be used for snatching the floor of cutting completion and remove it to place the platform on.
Furthermore, guide rails are arranged on the ground on two sides or one side of the underground shear wall; the floor transport system and grouting device are movable along the guide rails.
Furthermore, the size of the underground shear wall is determined by the length according to the actual size of the underground pool, and can reach 100m or more; the height of the underground shear wall is determined according to the number of the layers of the overhanging mould tables, the bottom mould table is arranged on the bottom surface of the underground pool, the height of about 1.5m is required to be increased when one layer of mould table is overhung upwards, and the height of the wall body is about 1.5m higher than that of the top mould table. In addition, if the ground one deck also is as production space, then top layer mould platform and ground parallel and level, this moment underground shear force wall body top height need not to exceed top layer mould platform, with ground parallel and level can, top layer mould platform is used for ground one deck to use this moment.
Furthermore, the cantilever beam can adopt a steel beam, a steel truss or a concrete cantilever beam, and a mould platform is laid on the steel beam, the steel truss or the concrete cantilever beam.
Furthermore, the die table can be used for adapting to the production of ribbed prestressed composite slab test pieces and the installation of corresponding matched components (such as a movable napper, a concrete discharge port, a floor slab conveying device and the like), and the width of the floor slab can be designed to be 0.5-2.1 m.
Furthermore, the cantilever beam can preset an upward inclination angle according to the calculated deflection during installation or pouring, so that the mold table is kept horizontal during production after the mold table and related equipment are laid.
Furthermore, a row of pore channels are arranged on the transverse wall corresponding to each layer of the mould platform and used as a steel bar channel when the prestressed steel bars are tensioned.
Furthermore, a platform is arranged at a proper position below each row of pore channels, and when the platform is used for tensioning prestressed reinforcements, tensioning equipment and the platform which is convenient for workers to operate are installed.
The prefabricated floor slab is made of self-compacting concrete, so that a vibrating device is not required to be arranged; after the material distribution is finished, the grouting device moves to the end side of the mould platform system, quits the operation and leaves a transportation channel between the mould platform systems;
the whole underground pond can be used as a steam-curing container, and an underground steam-curing scheme is adopted to realize steam curing in the production process;
furthermore, the partition strips are arranged inside each die table, the prefabricated floor slabs can be flexibly arranged according to the size of the required prefabricated floor slabs, and the single floor slabs can be divided only by cutting off the prestressed tendons in the partition strips during cutting.
The technical scheme of the invention has the following beneficial effects:
1. the invention expands the production space to the underground, and provides a novel production system, which improves the space utilization rate while expanding the production space of a factory, thereby comprehensively improving the production capacity of the factory;
2. the large-scale die platform system adopted by the invention is matched with the floor slab cutting system and the floor slab conveying system, and the novel floor slab production mode greatly improves the production efficiency. The floor slab can be cut according to the requirement by the innovative production mode without adopting a bench formwork with excessive size, so that the production cost is reduced, and the benefit is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic plan view of an assembled precast floor slab underground production system according to one or more embodiments;
FIG. 2 is a schematic perspective view of a stereolithography system according to one or more embodiments;
in the figure: 1-a stereoscopic mould table system; 2-a guide rail; 3-a hopper; 4-a mobile napper; 5-transverse wall; 6-underground pool outlet; 7-floor transportation means; 8- (multi-layer) die table; 9-underground shear wall.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
as described in the background of the invention, there are disadvantages in the prior art, and in order to solve the above technical problems, the present application provides an underground production system of precast prestressed concrete floor slabs:
the technical problems to be solved by the invention are as follows:
1. the invention develops underground space under certain conditions of factory land, thereby solving the problem of insufficient effective production space of factories;
2. the invention utilizes the three-dimensional production line, improves the space utilization rate of the factory, and further improves the productivity;
3. the production system developed by the invention can realize the batch high-efficiency production of the precast prestressed concrete floor slabs.
In a typical embodiment of the present application, an underground production space (underground pit) of a prefabricated building prefabricated part production factory as shown in fig. 1 and fig. 2 is designed into an underground pit three-dimensional production system of a prefabricated prestressed concrete floor slab; the production system consists of one or more subsystems, and each subsystem consists of a three-dimensional mould platform system 1 and a floor slab transportation system 7;
the three-dimensional formwork system 1 is composed of an underground shear wall 9, a plurality of layers of overhanging formworks 8 at two sides of the underground shear wall 9 and transverse walls 5 at two longitudinal ends of the underground shear wall 9;
the multi-layer mould tables are cantilevered on two sides or one side of the underground shear wall through cantilever beams (in the figure 1, subsystems positioned at the top and the bottom are single-side mould tables, and subsystems positioned in the middle are double-side mould tables);
a movable roughening machine 4 is arranged on each layer of die table, and the movable roughening machine 4 can move and roughen along the longitudinal direction of the die table to achieve roughening in the production process of the precast floor slabs on each layer of die table;
a concrete conveying pipeline is laid above each layer of mould platform, a slurry inlet and a slurry outlet are arranged on the concrete conveying pipeline, the slurry inlet is used for connecting a grouting device, the grouting device provided in the embodiment corresponds to a hopper 3 in the figure, the hopper 3 is arranged on a guide rail between the two subsystems, grouting can be simultaneously carried out on the two subsystems, grouting can be carried out on only one subsystem, and grouting into the interior of the mould plate is realized by the hopper 3; and the hopper 3 in the figure is provided with a plurality of grouting pipes, so that grouting can be simultaneously performed in a plurality of mould platforms, and grouting can also be simultaneously performed in a plurality of mould platforms. The transverse walls 5 are arranged at two ends of the underground shear wall and are vertical to the underground shear wall;
in this embodiment or other implementations, the size of the underground shear wall 9 may be determined by the actual size of the underground pond, and may reach 100m or more, the height is determined by the number of layers of the suspended mold table, the bottom mold table is placed on the bottom surface of the underground pond, the height of about 1.5m is required to be increased when one layer of the mold table is suspended upwards, and the top height of the wall is about 1.5m higher than that of the top mold table, in fig. 2, 3 layers of the mold tables are illustrated as an example, wherein two layers are suspended, and the height of the wall is about 4.5m at this time;
in this embodiment or other implementations, the overhanging structure of the underground shear wall 9 can adopt a steel beam or a steel truss, and a mould platform is laid on the beam; or a concrete cantilever beam, and a mould platform is laid on the beam;
in this embodiment or other implementations, the die table 8 may be used for the production of ribbed prestressed laminated slab test pieces, and may also be used for the production of other test pieces; the mould table is provided with corresponding matched components (such as a movable napping machine, a concrete discharge port, a floor slab conveying device and the like); further, the width of the floor slab can be designed to be 0.5 m-2.1.
In the embodiment or other implementations, the upward inclination angle of the cantilever beam can be preset according to the calculated deflection during installation or pouring, so that the mold table is kept horizontal during production after the mold table and relevant equipment are laid;
in this embodiment or other embodiments, the transverse walls 5 are disposed at two longitudinal ends of the wall body, and the distance between the transverse walls at the two ends and the two ends of the mold table is about 0.5 m; a row of pore channels are arranged on the transverse wall corresponding to each layer of the mould platform and are used as steel bar channels when the prestressed steel bars are tensioned; a platform is arranged at a proper position below each layer of pore channel on the transverse wall 5, and when the platform is used for tensioning prestressed steel bars, tensioning equipment and the platform convenient for workers to operate are installed;
in this embodiment or other embodiments, a guide rail 2 is installed on the ground on one side or both sides of the three-dimensional mold table system, and a movable self-compacting concrete hopper 3 is arranged on the guide rail and used for feeding.
In this embodiment or other implementations, concrete conveying pipelines are laid on each layer of the mold platform, the other ends of the pipelines are connected with self-compacting concrete hoppers 3, pipeline discharge ports are arranged at intervals along the height direction, the hoppers move along the guide rails 2 during material distribution, concrete materials are conveyed to the conveying pipelines on the mold platform through the hoppers, and then the materials are uniformly distributed on the mold platform from the discharge ports;
in this embodiment or other embodiments, the precast floor slab is made of self-compacting concrete, so that a vibration device is not needed. After the material distribution is finished, the hopper 3 moves to the end side of the die table system, quits the work and leaves a transportation channel between the die table systems;
in the embodiment or other implementations, the whole underground pond can be used as a steam-curing container, and an underground steam-curing scheme is adopted to realize steam curing in the production process;
in the embodiment or other implementations, the partition strips are arranged on the multilayer die table, the partition strips can be flexibly arranged according to the size of the required prefabricated floor slab, and the single floor slab can be divided by cutting off the prestressed tendons in the partition strips during cutting;
in this embodiment or other implementations, a floor slab transportation device 7 is arranged on a guide rail system arranged on the ground on one side or two sides of the die table system, and the floor slab transportation device is composed of a floor slab placing platform, a lifting mechanism and a gripping device, can move up and down to a position flush with each layer of die tables, grips and cuts the floor slabs and moves to the placing platform, and can convey the floor slabs to an underground pool outlet 6 on the end side of the die table system along the guide rail 2 after loading is completed, so that the transportation and storage of the floor slabs are realized.
The invention innovatively provides a concept of an underground production system and provides an integrated form that a plurality of layers of large-scale die tables are arranged on two sides of an underground shear wall on two sides; compared with the single plane arrangement production line in the prior art, the scheme has the advantages that the underground space is utilized to carry out three-dimensional arrangement production system, the occupied space is small, the production efficiency is high (about 3-5 times of a single long line platform and 10 times of a single mould platform), the capacity is high (about 3-5 times of the single long line platform and 10 times of the single mould platform), the labor is saved by about 80%, and the production cost is reduced by about 70%;
the technical scheme of the invention can finish the formwork support, prestressed tendon tensioning and formwork removal of the prefabricated floor slab produced on the whole formwork table at a time, and cut a floor slab according to the preset dividing strips, so that the production efficiency is high, and the underground steam curing can be realized by means of the technical scheme of underground curing, thereby not only having high efficiency, but also saving energy.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. An underground production system of a prefabricated prestressed concrete floor slab is characterized by comprising one or more subsystems arranged underground, wherein each subsystem is composed of a three-dimensional mould platform system and a floor slab transportation system;
the three-dimensional mould platform system comprises an underground shear wall, a plurality of layers of mould platforms and a transverse wall; the multi-layer mould tables are cantilevered on two sides or one side of the underground shear wall through cantilever beams, a movable roughening machine is mounted on each layer of mould table, and the movable roughening machine can move and roughen along the longitudinal direction of the mould tables to achieve roughening in the production process of the prefabricated floor slab on each layer of mould table; concrete conveying pipelines are laid above each layer of mould platform, and are provided with slurry inlets and slurry outlets, wherein the slurry inlets are used for being connected with a grouting device to realize grouting into the template; the transverse walls are arranged at two ends of the underground shear wall and are vertical to the underground shear wall; the floor slab transportation system is arranged on one side or two sides of the three-dimensional mould platform system and used for transporting the cut floor slabs.
2. An underground production system of precast prestressed concrete floor slabs as recited in claim 1, wherein said floor slab transportation system includes a floor slab placement platform, an elevating mechanism, and a gripping device; the lifting mechanism enables the floor slab placing platform to be lifted to a required height, and the grabbing device is used for grabbing the cut floor slabs and moving the floor slabs to the floor slab placing platform.
3. An underground production system of precast prestressed concrete floor slabs as claimed in claim 1, wherein guide rails are provided on the ground on both sides or one side of the underground shear wall; the floor transport system and grouting device are movable along the guide rails.
4. An underground production system of precast prestressed concrete floor slabs as recited in claim 1, wherein said underground shear wall is sized in length in accordance with actual size of the underground pool; the height of the underground shear wall is determined according to the number of the layers of the suspended mould tables, the bottom mould table is arranged on the bottom surface of the underground pool, and the top height of the underground shear wall is higher than that of the top mould table.
5. An underground production system for precast prestressed concrete floor slabs according to claim 1, wherein said cantilever beam is a steel beam, a steel truss or a concrete cantilever beam, and a formwork is laid on said steel beam, steel truss or concrete cantilever beam.
6. An underground production system of precast prestressed concrete floor slab as recited in claim 1, wherein said cantilever beams are installed or poured with a preset upward inclination angle according to the calculated deflection, ensuring that the formwork is kept horizontal when the production is performed after the laying of the formwork and the installation of the related equipments.
7. An underground production system of precast prestressed concrete floor slab as claimed in claim 1, wherein a row of holes is provided on said lateral wall corresponding to each floor of the formwork for the passage of the reinforcing bars when the prestressed reinforcing bars are tensioned.
8. An underground production system of precast prestressed concrete floor slab as claimed in claim 7, wherein a platform is provided at a proper position below each row of said holes for installing a tension device and a platform for facilitating a worker's operation when tensioning the prestressed reinforcement.
9. An underground production system of precast prestressed concrete floor slabs as claimed in claim 7, wherein said concrete floor slab is made of self-compacting concrete, and after the distribution is completed, the grouting means is moved to the end side of the formwork system, withdrawn from operation and left from the transportation passage between the formwork systems.
10. An underground production system for precast prestressed concrete floor slabs according to claim 1, wherein a partition bar is provided inside each of the mold blocks, which can be flexibly arranged according to the size of the desired precast floor slab, and the individual floor slabs can be divided by cutting off the prestressed tendons inside the partition bars during cutting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811425964.5A CN111216225A (en) | 2018-11-27 | 2018-11-27 | Underground production system of prefabricated prestressed concrete floor slab |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811425964.5A CN111216225A (en) | 2018-11-27 | 2018-11-27 | Underground production system of prefabricated prestressed concrete floor slab |
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| CN111216225A true CN111216225A (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811425964.5A Pending CN111216225A (en) | 2018-11-27 | 2018-11-27 | Underground production system of prefabricated prestressed concrete floor slab |
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| KR20070102775A (en) * | 2006-04-17 | 2007-10-22 | 정재영 | Method of conctruction of retaining wall for reinforced earth using concrete block |
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| CN104493965A (en) * | 2015-01-26 | 2015-04-08 | 三一汽车制造有限公司 | Precast concrete curing and distribution device, production system and production method |
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| CN106493846A (en) * | 2016-12-23 | 2017-03-15 | 石狮市台瑞精密机械有限公司 | A kind of ceramic grout equipment of Automatic-feeding and grouting method |
| CN106760752A (en) * | 2016-12-29 | 2017-05-31 | 上海涂思机电技术有限公司 | Multipurpose stops wall and its parking scheme |
| CN209633327U (en) * | 2018-11-27 | 2019-11-15 | 山东大学 | A kind of underground production system of precast prestressed concrete floor |
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2018
- 2018-11-27 CN CN201811425964.5A patent/CN111216225A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070102775A (en) * | 2006-04-17 | 2007-10-22 | 정재영 | Method of conctruction of retaining wall for reinforced earth using concrete block |
| CN203765773U (en) * | 2014-04-10 | 2014-08-13 | 任丘市永基建筑安装工程有限公司 | Automatic maintenance device of precast concrete plate |
| CN104493965A (en) * | 2015-01-26 | 2015-04-08 | 三一汽车制造有限公司 | Precast concrete curing and distribution device, production system and production method |
| CN205296221U (en) * | 2016-01-12 | 2016-06-08 | 上海市城市建设设计研究总院 | Many function synthesis piping lane |
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