CN112163258A - Design method of venue hanging bracket based on BIM technology - Google Patents
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Abstract
The invention discloses a design method of a venue hanging bracket based on a BIM technology, which belongs to the field of venue engineering and comprises the following steps: determining design rules of a hanger and a pipeline, collecting drawings, limiting BIM models and sizes, linking related models and outputting distribution maps, checking collision of the BIM models, setting arrangement principles, selecting pipeline branches and elbows, reviewing materials by experts, estimating cost, recording data, arranging site construction and the like; the invention adopts BIM technology and Revit to solve the problems of unreasonable early-stage design, easy loss of design materials, high difficulty in field construction, easy rework, unreasonable space design, increased difficulty in later-stage maintenance and the like.
Description
Technical Field
The invention belongs to the field of venue engineering, and particularly relates to a design method of a venue hanging bracket based on a BIM technology.
Background
With the progress of science and technology, venue engineering has the advantages of complex structure and shape, multiple professional functions, centralized MEP pipelines and high requirement on indoor decoration, and more exploration and research are carried out in the construction process of the MEP pipelines. In the work progress, narrow spaces such as corridor area need satisfy the furred ceiling elevation requirement after the MEP pipeline is optimized, and partial perforation furred ceiling region or non-furred ceiling region still need reach MEP pipeline overall arrangement clear, and is pleasing to the eye, carries out comprehensive gallows design, construction based on BIM technique, optimizes spatial arrangement, reaches that the MEP pipeline concentrates compactly, and the overall arrangement is pleasing to the eye, satisfies the furred ceiling control elevation requirement.
In the prior art, the early preparation is insufficient, the coordination workload of site construction is large, the conditions of local damage and rework are easy to occur, the design is unreasonable, the difficulty of later maintenance is increased, and the maintenance cost is excessively increased.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the BIM technology and Revit are adopted to solve the problems that the design is unreasonable in the early stage, the design material is easy to lose, the on-site construction difficulty is high, the reworking is easy, the space design is unreasonable, the later maintenance difficulty is increased and the like.
In order to solve the technical problems, the inventor obtains the technical scheme of the invention through practice and summary, and the invention discloses the following steps: determining design rules of a stadium hanger and a pipeline, and listing rules;
step two: collecting and sorting drawings, and scanning and inputting the drawings into a file management system;
step three: determining Revit files of various hangers and pipelines required to be used in a BIM (building information modeling) model according to a design drawing in a file management system, establishing the hangers and the pipeline model, and selecting the hangers to be of a multilayer structure;
step four: according to the actual BIM model classification, linking the building model and the structural model in the third step into the electromechanical model, combining the models and carrying out comprehensive arrangement according to the rule in the first step, outputting distribution diagrams of pipelines and hanging frames, and returning to the second step to the third step when the distribution diagrams do not accord with the rule in the first step;
step five: carrying out MEP collision check on the BIM model, returning the model collision to the third step selection model or returning to the fourth step re-linking, recording the model meeting the standard in a file management system, checking hard collision in Revit software according to actual needs, and checking soft collision in Navisvarks;
step six: according to furred ceiling elevation, control elevation, MEP drawing among the distribution diagram accomplish the preliminary coordination of pipeline between the MEP specialty and arrange, to the crane span structure, tuber pipe and the water pipe that need install on the space height is concentrated, the design principle of arranging includes following:
a. the bridge is arranged above the water pipe, the pipeline with small diameter avoids the pipeline with large diameter, and the pipeline with pressure avoids the pipeline without pressure;
b. when the pipeline needs heat preservation, the pipeline arrangement space comprises the double-layer thickness of the heat preservation layer and the total diameter of the pipeline;
c. when single type pipelines in the MEP cannot be arranged on the same layer, the air pipes are respectively combined with the water pipes and the bridge frame to be arranged on the same layer;
d. when the bridge frame and the water pipe are arranged on the same layer, the distance between the bridge frame and the water pipe is 150-800 mm;
e. when an MEP pipeline is arranged, construction and maintenance space needs to be reserved, and an operation space of 500-800 mm is reserved in a middle gap M of the horizontal plane of the hanger;
f. reserving a clearance of no less than 150mm for the height of the MEP pipeline at each layer position;
g. same-layer pipeline arrangement principle: when the MEP pipelines on the same layer are arranged, the placement position of the pipeline with large volume is considered and is taken as a reference point, then the pipeline with small volume is arranged, and then the MEP pipeline arranged on each layer is close to the center from two ends;
and (4) checking the MEP pipeline collision, finishing the coordination of collision points, finishing the coordination optimization of the MEP pipeline, enabling the distribution of the optimized MEP pipeline to meet the design rule of the step one, and recording the arrangement principle in a document management system.
Specifically, the following arrangement rule is also satisfied:
the small pipe avoids the large pipe, and the small pipe is low in cost and easy to install; the temporary pipeline avoids the long pipeline so as to ensure the stability of the long pipeline; the newly-built pipeline avoids the original pipeline, so that adverse effects on the original pipeline are avoided; the metal pipe avoids the non-metal pipe, because the metal pipe is easy to bend, cut and connect; the cold water pipe is avoided from the hot water pipe, and the hot water pipe usually needs an insulating layer, so that the manufacturing cost is high; the water supply pipeline avoids a drainage pipeline, and because the drainage pipeline is mostly gravity flow and dirt in the pipeline is easy to block, the water supply pipeline is directly drained outdoors; the low-pressure pipe avoids the high-pressure pipe, and the high-pressure pipe is high in manufacturing cost; the pipeline with few accessories avoids the pipeline with many accessories, thus being beneficial to construction operation, maintenance and pipe fitting replacement;
step seven, respectively selecting cross sections arranged at the pipeline branch, the reducing and the elbow in the optimized model, preliminarily designing the size of the hanger according to the spatial position of the pipeline in the cross sections, and carrying out stress calculation and rechecking on the hanger to complete the shape and size design of the hanger;
calculating a reasonable distance of the hanger according to the load of the MEP pipeline to complete the plane arrangement of the hanger;
according to the design requirement of the first step, whether pipeline branching, reducing and elbow design is reasonable or not is calculated, the step is unreasonably repeated, optimized design is completed, a finished product diagram is output and subjected to stress analysis, and data are recorded in a file management system;
step eight, conveying the materials in the steps from the first step to the seventh step of the file management system to an expert group for reexamination, and recording the result of the reexamination without passing the output results of the steps from the first step to the seventh step;
step nine, calculating the capital required in the steps one to eight, estimating the cost, if the capital does not meet the cost requirement, returning to the steps one to eight again, and recording the estimated cost in the document management system after the result is calculated;
tenthly, recording the data of an expert group in a file management system through the review design of the expert group, selecting channel steel and angle steel with corresponding sizes according to the design of a hanger, processing and manufacturing the hanger on a construction site, performing construction and installation according to the plane arrangement of the hanger in the model, and performing MEP pipeline construction from top to bottom according to the spatial arrangement of pipelines in the MEP model.
Preferably, the BIM model data of the pipeline includes the type, material, diameter, length, plane position, elevation, pipeline number, pipeline attachment, pipeline connector and connection mode of each professional pipeline, and all contents related to the pipeline, and records the data in the file management system.
Preferably, the three-dimensional BIM model data of the hanger includes shape and style, material, plane position, elevation, width, connection mode of the hanger and all contents related to the hanger, and the data is recorded in the document management system.
Preferably, the pipeline branch, reducing and elbow accounting data comprises pipeline branch strength, rigidity and bearing capacity calculation, the reducing and elbow accounting data comprises section stress distribution and connection strength, and the data is recorded in a file management system.
Preferably, the finished product drawings comprise two-dimensional drawings, three-dimensional drawings, parameter tables and entity models, the parameter tables comprise hanger and pipeline parameter characteristics and accessory tables, the number of layers of each layer of the hanger model and the data number of the part are marked, and data are recorded in the file management system.
Preferably, the stress analysis of the finished product diagram comprises the stress analysis of the whole hanger, the stress analysis of hanger parts, the stress analysis of the whole pipeline and the stress analysis of pipeline individual parts, and the stress analysis of the finished product diagram is suitable for passing through finite element analysis.
Preferably, the hanger comprises upright posts and cross arms, the upright posts are fixedly connected with the cross arms, two groups of upright posts are arranged on the upright posts, the two groups of upright posts are distributed at two ends of the cross arms, and the pipeline distribution on the hanger is suitable for being integrally divided into an air pipe, a bridge frame and a water pipe from top to bottom;
the gallows distributes according to the cross arm and sets up the number of piles, and when crane span structure and water pipe were arranged on same layer, crane span structure and water pipe were located the cross arm respectively.
Compared with the prior art, the invention can obtain the following technical effects:
the invention designs aiming at the hanging bracket in the venue, avoids the problems of installation, quality, cost and later maintenance caused by unqualified early design, the design data is stored in a file management system, the review by a review department and the consideration of experts are facilitated, a design loop has self review, the design loop is intensively arranged in the early design, and the appearance of later problems is reduced; the distribution setting to tuber pipe, crane span structure and water pipe has the rationality, and the space is left to the interval, and the later maintenance of being convenient for all practices thrift the later stage cost greatly.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a flow chart of a design method of the present invention;
FIG. 2 is a diagram showing the distribution of the pipeline (including the stent) on the hanger in example 1 of the present invention;
fig. 3 is a distribution diagram of the pipeline on the hanger (without the bracket) in example 1 of the present invention.
In the figure: 1. a column; 2. a cross arm; 3. a smoke exhaust pipe; 4. a fresh air duct; 5. a security bridge frame; 6. an exhaust duct; 7. a first strong current bridge; 8. a second strong current bridge; 9. a weak current bridge frame I; 10. a weak current bridge frame II; 11. a weak current bridge frame III; 12. a weak current bridge frame IV; 13. a fire-fighting bridge frame; 14. a steam condensate pipe; 15. a condenser tube; 16. a reclaimed water supply pipe; 17. a hot water supply pipe; 18. fire-fighting water gun tubes; 19. a hydrant pipe; 20. an automatic spray pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The application of the principles of the present invention will be further described with reference to the accompanying drawings and specific embodiments.
Example 1
As shown in fig. 1: a design method of a venue hanging bracket based on a BIM technology comprises the following steps:
the method comprises the following steps: determining design rules of a stadium hanger and a pipeline, and listing rules;
step two: collecting and sorting drawings, and scanning and inputting the drawings into a file management system;
step three: determining Revit files of various hangers and pipelines required to be used in a BIM (building information modeling) model according to a design drawing in a file management system, establishing the hangers and the pipeline model, and selecting the hangers to be of a multilayer structure;
step four: according to the actual BIM model classification, linking the building model and the structural model in the third step into the electromechanical model, combining the models and carrying out comprehensive arrangement according to the rule in the first step, outputting distribution diagrams of pipelines and hanging frames, and returning to the second step to the third step when the distribution diagrams do not accord with the rule in the first step;
step five: carrying out MEP collision check on the BIM model, returning the model collision to the third step selection model or returning to the fourth step re-linking, recording the model meeting the standard in a file management system, checking hard collision in Revit software according to actual needs, and checking soft collision in Navisvarks;
step six: according to furred ceiling elevation, control elevation, MEP drawing among the distribution diagram accomplish the preliminary coordination of pipeline between the MEP specialty and arrange, to the crane span structure, tuber pipe and the water pipe that need install on the space height is concentrated, the design principle of arranging includes following:
a. the bridge is arranged above the water pipe, the pipeline with small diameter avoids the pipeline with large diameter, and the pipeline with pressure avoids the pipeline without pressure;
b. when the pipeline needs heat preservation, the pipeline arrangement space comprises the double-layer thickness of the heat preservation layer and the total diameter of the pipeline;
c. when single type pipelines in the MEP cannot be arranged on the same layer, the air pipes are respectively combined with the water pipes and the bridge frame to be arranged on the same layer;
d. when the bridge frame and the water pipe are arranged on the same layer, the distance between the bridge frame and the water pipe is 150-800 mm;
e. when an MEP pipeline is arranged, construction and maintenance space needs to be reserved, and an operation space of 500-800 mm is reserved in a middle gap M of the horizontal plane of the hanger;
f. reserving a clearance of no less than 150mm for the height of the MEP pipeline at each layer position;
g. same-layer pipeline arrangement principle: when the MEP pipelines on the same layer are arranged, the placement position of the pipeline with large volume is considered and is taken as a reference point, then the pipeline with small volume is arranged, and then the MEP pipeline arranged on each layer is close to the center from two ends;
and (4) checking the MEP pipeline collision, finishing the coordination of collision points, finishing the coordination optimization of the MEP pipeline, enabling the distribution of the optimized MEP pipeline to meet the design rule of the step one, and recording the arrangement principle in a document management system.
Specifically, the following arrangement rules are also satisfied: the small pipe avoids the large pipe; the temporary pipeline avoids the permanent pipeline; newly building a pipeline to avoid the original pipeline; the metal pipe avoids the non-metal pipe; the cold water pipe avoids the hot water pipe; the water supply pipeline avoids a drainage pipeline; the low-pressure pipe avoids the high-pressure pipe; the pipe with few accessories avoids the pipe with many accessories. When various pipelines are arranged at the same position, the pipelines are in a straight line, parallel to each other and not staggered as much as possible, and the operation space for construction, installation, maintenance and replacement, the space for arranging a support column and a hanging bracket and thermal expansion compensation are also considered.
Step seven, respectively selecting cross sections arranged at the pipeline branch, the reducing and the elbow in the optimized model, preliminarily designing the size of the hanger according to the spatial position of the pipeline in the cross sections, and carrying out stress calculation and rechecking on the hanger to complete the shape and size design of the hanger;
calculating a reasonable distance of the hanger according to the load of the MEP pipeline to complete the plane arrangement of the hanger;
according to the design requirement of the first step, whether pipeline branching, reducing and elbow design is reasonable or not is calculated, the step is unreasonably repeated, optimized design is completed, a finished product diagram is output and subjected to stress analysis, and data are recorded in a file management system;
step eight, conveying the materials in the steps from the first step to the seventh step of the file management system to an expert group for reexamination, and recording the result of the reexamination without passing the output results of the steps from the first step to the seventh step;
step nine, calculating the capital required in the steps one to eight, estimating the cost, if the capital does not meet the cost requirement, returning to the steps one to eight again, and recording the estimated cost in the document management system after the result is calculated;
tenthly, recording the data of an expert group in a file management system through the review design of the expert group, selecting channel steel and angle steel with corresponding sizes according to the design of a hanger, processing and manufacturing the hanger on a construction site, performing construction and installation according to the plane arrangement of the hanger in the model, and performing MEP pipeline construction from top to bottom according to the spatial arrangement of pipelines in the MEP model.
The BIM model data of the pipeline comprises the types, the pipeline materials, the diameters, the lengths, the plane positions, the elevations, the pipeline numbers, the pipeline accessories, the pipeline connecting pieces, the connecting modes and all contents related to the pipeline of various professional pipelines, and records the data in a file management system.
The three-dimensional BIM model data of the hanger comprises hanger shape style, material, plane position, elevation, width, connection mode and all contents related to the hanger, and the data is recorded in a file management system.
The pipeline branch, reducing and elbow accounting data comprises pipeline branch strength, rigidity and bearing capacity calculation, the reducing and elbow accounting data comprises section stress distribution and connection strength, and data are recorded in a file management system.
The finished product drawings comprise two-dimensional drawings, three-dimensional drawings, parameter tables and entity models, the parameter tables comprise hanger and pipeline parameter characteristics and accessory tables, the number of layers of each layer of the hanger model and the data number of parts are marked, and data are recorded in a file management system.
The stress analysis of the finished product diagram comprises the stress analysis of the whole hanger, the stress analysis of hanger parts, the stress analysis of the whole pipeline and the stress analysis of the single pipeline part, and the stress analysis of the finished product diagram is suitable for being analyzed through finite elements.
The gallows includes stand 1 and cross arm 2, stand 1 and cross arm 2 fixed connection, stand 1
Two groups of upright posts 1 are arranged at two ends of the cross arm 2, and the pipeline distribution on the hanger is suitable for being integrally divided into an air pipe, a bridge frame and a water pipe from top to bottom;
the gallows sets up the number of piles according to cross arm 2 distribution, when crane span structure and water pipe arrange on same layer, crane span structure and water pipe are located cross arm 2 respectively.
As shown in fig. 2, a hanger pipeline distribution diagram containing a support is shown, and fig. 3 is a hanger pipeline distribution diagram containing no support, the hanger comprises an upright post 1 and a cross arm 2, the uppermost layer in the hanger is a first layer, and the hanger comprises a smoke exhaust pipe 3, a fresh air pipe 4, a security bridge 5 and an exhaust pipe 6, wherein the smoke exhaust pipe 3, the fresh air pipe 4 and the exhaust pipe 6 are air pipes, the security bridge 5 belongs to the bridge, the volume of the middle of the security bridge 5 is small to avoid interference between the air pipes, the sum of the heights of the fresh air pipe 4 and the exhaust pipe 6 is smaller than that of the smoke exhaust pipe 3, and the support is arranged to separate the; a first electric bridge 7 and a second electric bridge 8 which belong to bridges are arranged on the second layer; the third layer is provided with a weak current bridge frame I9, a weak current bridge frame II 10, a weak current bridge frame III 11, a weak current bridge frame IV 12, a fire-fighting bridge frame 13, a steam condensate pipe 14 and a condenser pipe 15, wherein the steam condensate pipe 14 and the condenser pipe 15 belong to water pipes, the rest layers belong to bridge frames, and the fire-fighting bridge frame 13 and the steam condensate pipe 14 are arranged to be 200 mm; a water feeding pipe 16, a hot water feeding pipe 17, a fire water gun pipe 18, a fire hydrant pipe 19 and an automatic spraying pipe 20 are arranged in the fourth layer and belong to water pipes; the mid-gap M at the level of the spreader in the figure is 600 mm.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A design method of a venue hanging bracket based on a BIM technology is characterized in that: the method comprises the following steps:
the method comprises the following steps: determining design rules of a stadium hanger and a pipeline, and listing rules;
step two: collecting and sorting drawings, and scanning and inputting the drawings into a file management system;
step three: determining Revit files of various hangers and pipelines required to be used in a BIM (building information modeling) model according to a design drawing in a file management system, establishing the hangers and the pipeline model, and selecting the hangers to be of a multilayer structure;
step four: according to the actual BIM model classification, linking the building model and the structural model in the third step into the electromechanical model, combining the models and carrying out comprehensive arrangement according to the rule in the first step, outputting distribution diagrams of pipelines and hanging frames, and returning to the second step to the third step when the distribution diagrams do not accord with the rule in the first step;
step five: carrying out MEP collision check on the BIM model, returning the model collision to the third step selection model or returning to the fourth step re-linking, recording the model meeting the standard in a file management system, checking hard collision in Revit software according to actual needs, and checking soft collision in Navisvarks;
step six: according to furred ceiling elevation, control elevation, MEP drawing among the distribution diagram accomplish the preliminary coordination of pipeline between the MEP specialty and arrange, to the crane span structure, tuber pipe and the water pipe that need install on the space height is concentrated, the design principle of arranging includes following:
a. the bridge is arranged above the water pipe, the pipeline with small diameter avoids the pipeline with large diameter, and the pipeline with pressure avoids the pipeline without pressure;
b. when the pipeline needs heat preservation, the pipeline arrangement space comprises the double-layer thickness of the heat preservation layer and the total diameter of the pipeline;
c. when single type pipelines in the MEP cannot be arranged on the same layer, the air pipes are respectively combined with the water pipes and the bridge frame to be arranged on the same layer;
d. when the bridge frame and the water pipe are arranged on the same layer, the distance between the bridge frame and the water pipe is 150-800 mm;
e. when an MEP pipeline is arranged, construction and maintenance space needs to be reserved, and an operation space of 500-800 mm is reserved in a middle gap M of the horizontal plane of the hanger;
f. reserving a clearance of no less than 150mm for the height of the MEP pipeline at each layer position;
g. same-layer pipeline arrangement principle: when the MEP pipelines on the same layer are arranged, the placement position of the pipeline with large volume is considered and is taken as a reference point, then the pipeline with small volume is arranged, and then the MEP pipeline arranged on each layer is close to the center from two ends;
and (4) checking the MEP pipeline collision, finishing the coordination of collision points, finishing the coordination optimization of the MEP pipeline, enabling the distribution of the optimized MEP pipeline to meet the design rule of the step one, and recording the arrangement principle in a document management system.
Step seven, respectively selecting cross sections arranged at the pipeline branch, the reducing and the elbow in the optimized model, preliminarily designing the size of the hanger according to the spatial position of the pipeline in the cross sections, and carrying out stress calculation and rechecking on the hanger to complete the shape and size design of the hanger;
calculating a reasonable distance of the hanger according to the load of the MEP pipeline to complete the plane arrangement of the hanger;
according to the design requirement of the first step, whether pipeline branching, reducing and elbow design is reasonable or not is calculated, the step is unreasonably repeated, optimized design is completed, a finished product diagram is output and subjected to stress analysis, and data are recorded in a file management system;
step eight, conveying the materials in the steps from the first step to the seventh step of the file management system to an expert group for reexamination, and recording the result of the reexamination without passing the output results of the steps from the first step to the seventh step;
step nine, calculating the capital required in the steps one to eight, estimating the cost, if the capital does not meet the cost requirement, returning to the steps one to eight again, and recording the estimated cost in the document management system after the result is calculated;
tenthly, recording the data of an expert group in a file management system through the review design of the expert group, selecting channel steel and angle steel with corresponding sizes according to the design of a hanger, processing and manufacturing the hanger on a construction site, performing construction and installation according to the plane arrangement of the hanger in the model, and performing MEP pipeline construction from top to bottom according to the spatial arrangement of pipelines in the MEP model.
2. The design method of the venue hanging bracket based on the BIM technology as claimed in claim 1, wherein: the BIM model data of the pipeline comprises the types, the pipeline materials, the diameters, the lengths, the plane positions, the elevations, the pipeline numbers, the pipeline accessories, the pipeline connecting pieces, the connecting modes and all contents related to the pipeline of various professional pipelines, and records the data in a file management system.
3. The design method of the venue hanging bracket based on the BIM technology as claimed in claim 1, wherein: the three-dimensional BIM model data of the hanger comprises hanger shape style, material, plane position, elevation, width, connection mode and all contents related to the hanger, and the data is recorded in a file management system.
4. The design method of the venue hanging bracket based on the BIM technology as claimed in claim 1, wherein: the pipeline branch, reducing and elbow accounting data comprises pipeline branch strength, rigidity and bearing capacity calculation, the reducing and elbow accounting data comprises section stress distribution and connection strength, and data are recorded in a file management system.
5. The design method of the venue hanging bracket based on the BIM technology as claimed in claim 1, wherein: the finished product drawings comprise two-dimensional drawings, three-dimensional drawings, parameter tables and entity models, the parameter tables comprise hanger and pipeline parameter characteristics and accessory tables, the number of layers of each layer of the hanger model and the data number of parts are marked, and data are recorded in a file management system.
6. The design method of the venue hanging bracket based on the BIM technology as claimed in claim 1, wherein: the stress analysis of the finished product diagram comprises the stress analysis of the whole hanger, the stress analysis of hanger parts, the stress analysis of the whole pipeline and the stress analysis of the single pipeline part, and the stress analysis of the finished product diagram is suitable for being analyzed through finite elements.
7. The design method of the venue hanging bracket based on the BIM technology as claimed in claim 1, wherein: the hanging bracket comprises upright posts (1) and cross arms (2), the upright posts (1) are fixedly connected with the cross arms (2), two groups of upright posts (1) are arranged, the two groups of upright posts (1) are distributed at two ends of the cross arms (2), and the pipeline distribution on the hanging bracket is suitable for being integrally divided into an air pipe, a bridge frame and a water pipe from top to bottom;
the gallows distributes according to cross arm (2) and sets up the number of piles, when crane span structure and water pipe arrange on same layer, crane span structure and water pipe are located cross arm (2) respectively.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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