CN113090818A - Dynamic pipeline arrangement method - Google Patents
Dynamic pipeline arrangement method Download PDFInfo
- Publication number
- CN113090818A CN113090818A CN202110347565.7A CN202110347565A CN113090818A CN 113090818 A CN113090818 A CN 113090818A CN 202110347565 A CN202110347565 A CN 202110347565A CN 113090818 A CN113090818 A CN 113090818A
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- Prior art keywords
- pipe clamp
- pipeline
- pipe
- axis
- telescopic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000005452 bending Methods 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 abstract description 7
- 238000007790 scraping Methods 0.000 abstract description 6
- 238000004804 winding Methods 0.000 abstract description 6
- 230000009471 action Effects 0.000 abstract description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/01—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets for supporting or guiding the pipes, cables or protective tubing, between relatively movable points, e.g. movable channels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/08—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing
- F16L3/10—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing divided, i.e. with two members engaging the pipe, cable or protective tubing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/16—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with special provision allowing movement of the pipe
- F16L3/20—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with special provision allowing movement of the pipe allowing movement in transverse direction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/16—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with special provision allowing movement of the pipe
- F16L3/20—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with special provision allowing movement of the pipe allowing movement in transverse direction
- F16L3/202—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with special provision allowing movement of the pipe allowing movement in transverse direction the transverse movement being converted to a rotational movement
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
Abstract
The invention provides a dynamic pipeline arrangement method, wherein a pipeline has rotary motion around a rotary axis and telescopic motion in a plane perpendicular to the rotary axis, a telescopic structure of the telescopic motion is arranged on the rotary structure of the rotary motion, at least one point of the pipeline is restrained by a pipe clamp, the pipe clamp is fixedly arranged or movably arranged, and the pipe clamp is independent of the rotary structure and the telescopic structure. The pipe clamps comprise a first pipe clamp and a second pipe clamp, and the phenomena of winding, twisting, scraping and the like of the pipeline in the rotating and stretching processes can be avoided through the arrangement of the first pipe clamp and the second pipe clamp; the pipeline allowance generated by the telescopic action can be controlled within the length range from the telescopic structure to the first pipe clamp; the pipeline rotates along with the main body structure when the rotating structure rotates around the rotating axis, so that the pipeline is prevented from being twisted and bent, the reasonable bending radius of the pipeline is ensured, and the working medium in the pipeline flows smoothly.
Description
Technical Field
The invention relates to the technical field of pipeline arrangement, in particular to a dynamic pipeline arrangement method.
Background
In the prior art, the arrangement of a static hydraulic pipeline is usually to arrange a fixed pipe clamp along the way along the trend of working media in the pipeline so as to achieve the purpose of fixing the pipeline; in general, a dynamic hydraulic pipeline is arranged by restraining the pipeline from moving past the center of a moving point or only fixing two ends of the pipeline by using a fixed pipe clamp. When the pipeline not only rotates around a shaft, but also has working states of stretching and retracting along the plane of the vertical rotating shaft, the traditional pipeline arrangement method can cause the pipeline to be wound, twisted, scraped and the like in the working process, and the service life of the pipeline is influenced.
In view of the above, there is a need for a dynamic pipeline layout method to solve the problems in the prior art.
Disclosure of Invention
The invention aims to provide a dynamic pipeline arrangement method, which aims to solve the problems of winding, twisting, scraping and the like of pipelines in the working process in the traditional pipeline arrangement method, and the specific technical scheme is as follows:
a dynamic pipeline arrangement method is characterized in that a pipeline has rotary motion around a rotary axis and telescopic motion in a plane perpendicular to the rotary axis, wherein a telescopic structure of the telescopic motion is arranged on the rotary structure of the rotary motion, at least one point of the pipeline is restrained by a pipe clamp, the pipe clamp is fixedly arranged or movably arranged, and the pipe clamp is independent of the rotary structure and the telescopic structure.
Preferably in the above technical solution, the pipe clamp includes a first pipe clamp and a second pipe clamp, the first pipe clamp is connected with the second pipe clamp, the pipeline sequentially passes through the first pipe clamp and the second pipe clamp, and the first pipe clamp and the second pipe clamp respectively constrain two points of the pipeline.
Preferably, in the above technical solution, controlling the distance between the first pipe clamp and the rotating structure controls the bending radius of the pipeline.
Preferably, in the above technical scheme, the second pipe clamp is fixedly arranged, the first pipe clamp is rotatably arranged on a connecting piece of the second pipe clamp, the pipeline drives the first pipe clamp to rotate on the connecting piece, and the pipeline is movably arranged on the second pipe clamp.
Preferably, in the above technical solution, the second pipe clamp is provided with a through groove, the pipeline passes through the through groove and can slide in the through groove; alternatively, the line is rotatably connected to a fixed line section in the second clamp.
Preferably, in the above technical scheme, the first pipe clamp is fixedly arranged on a connecting piece of the second pipe clamp, the second pipe clamp is rotatably arranged, and the pipeline drives the second pipe clamp to rotate.
Preferably, in the above technical scheme, the first pipe clamp is rotatably arranged on a connecting piece of the second pipe clamp, the second pipe clamp is rotatably arranged, and the pipeline drives the first pipe clamp and the second pipe clamp to rotate.
Preferably, in the above technical solution, the first pipe clamp is disposed on an extension line of the rotation axis.
In the above technical solution, preferably, an included angle between the rotation axis of the first pipe clamp and the rotation axis is 0 ° to 90 °.
In the above solution, it is preferable that the rotation axis of the second pipe clamp is arranged parallel to the rotation axis.
The technical scheme of the invention has the following beneficial effects:
the first pipe clamp and the second pipe clamp are arranged to avoid winding, twisting, scraping and other phenomena of the pipeline in the rotating and stretching processes. The pipeline can be guided to be away from the structural part by arranging the first pipe clamp, the phenomena of winding, scraping and the like of the pipeline and the main body in the working process are avoided, and the pipeline allowance generated by the telescopic action can be controlled within the length range from the telescopic structure to the first pipe clamp; the pipeline rotates along with the main body structure when the rotating structure rotates around the rotating axis, so that the pipeline is prevented from being twisted and bent, the reasonable bending radius of the pipeline is ensured, and the working medium in the pipeline flows smoothly.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of the layout of piping in example 1 of the present invention;
FIG. 2 is a schematic view of the layout of piping in example 2 of the present invention;
FIG. 3 is a schematic view of the piping arrangement in example 3 of the present invention;
the pipeline clamp comprises a rotating structure 1, a telescopic structure 2, a pipeline 3, a pipeline 4, a first pipe clamp 5 and a second pipe clamp.
Detailed Description
In order that the invention may be more fully understood, a more particular description of the invention will now be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
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 invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Example 1:
referring to fig. 1, in a dynamic pipeline layout method, a pipeline 3 has a rotation motion around a rotation axis and a telescopic motion in a plane perpendicular to the rotation axis, wherein a telescopic structure 2 of the telescopic motion is disposed on a rotation structure 1 of the rotation motion, the telescopic structure and the rotation structure are both the prior art, and a specific structural composition of the telescopic structure and the rotation structure is not described in this embodiment. Referring to fig. 1, a rotating structure 1 drives a pipeline 3 to rotate around an X axis (the X axis is a rotating axis), a telescopic structure drives the pipeline 3 to perform telescopic motion along a Y axis, and at least one point of the pipeline 3 is constrained by a pipe clamp which is fixedly or movably arranged; the pipe clamp is independent of the rotating structure 1 and the telescopic structure 2, and specifically comprises the following components: the pipe clamp is not arranged on the rotating structure or the telescopic structure and is far away from the moving area of the rotating structure or the telescopic structure, and the pipe clamp is not driven by the rotating structure or the telescopic structure to move but driven by a pipeline to move so as to ensure that the pipeline 3 between the telescopic structure 2 and the first pipe clamp 4 can not be in frictional contact with the rotating structure or the telescopic structure.
Referring to fig. 1, the pipe clamp comprises a first pipe clamp 4 and a second pipe clamp 5, the first pipe clamp 4 is connected with the second pipe clamp 5, the pipeline 3 sequentially passes through the first pipe clamp 4 and the second pipe clamp 5, and the first pipe clamp 4 and the second pipe clamp 5 respectively restrain two points of the pipeline 3.
Preferably, controlling the distance between the first pipe clamp 4 and the rotating structure 1 controls the bending radius of the pipeline 3.
In this embodiment, the second pipe clamp 5 is fixedly arranged, the first pipe clamp 4 is rotatably arranged on a connecting piece of the second pipe clamp 5, the pipeline 3 drives the first pipe clamp 4 to rotate on the connecting piece, and the pipeline 3 is movably arranged on the second pipe clamp 5.
The second pipe clamp 5 is provided with a through groove, the pipeline 3 penetrates through the through groove, and the pipeline 3 can slide in the through groove. Referring to fig. 1, when the pipeline 3 rotates around the X axis along with the rotating structure 1, the first pipe clamp 4 also rotates along with the pipeline 3, and a pipeline section between the first pipe clamp 4 and the second pipe clamp 5 and even a pipeline section in the second pipe clamp 5 can swing along with the first pipe clamp 4, and a movement space is just provided for the swing of the pipeline section through the groove.
Besides the through groove arranged on the second pipe clamp 5, a mode that the pipeline 3 is rotatably connected with a fixed pipeline section in the second pipe clamp 5 can also be adopted, namely, the fixed pipeline section is fixedly arranged in the second pipe clamp, and the pipeline 3 passing through the first pipe clamp 4 is rotatably connected with the fixed pipeline section (here, the pipeline 3 is defined as the position from the telescopic structure 2 to the end part of the second pipe clamp 5); due to the rotation of the first pipe clamp, the pipeline 3 (the pipeline between the first pipe clamp 4 and the second pipe clamp 5) passing through the first pipe clamp can also swing, and the pipeline 3 and the fixed pipeline section are in rotating connection, so that corresponding freedom degree can be provided for the swinging, and the situations of pressure building and twisting of the pipeline can be prevented.
Referring to fig. 1, in the present embodiment, preferably, the first pipe clamp 4 is disposed on an extension line of the rotation axis, and it should be noted that the disposing of the first pipe clamp on the extension line of the rotation axis is only an optimal disposing manner in the present embodiment, and the disposing of the first pipe clamp on the extension line of the rotation axis may also satisfy that the pipeline drives the first pipe clamp to rotate. It is further preferred that the angle between the axis of rotation of the first pipe clamp 4 (i.e. the XY-axis in fig. 1) and the axis of rotation is 0-90 °, preferably 30 ° in this embodiment.
The first pipe clamp and the second pipe clamp are arranged in the embodiment, so that the phenomena of winding, twisting, scraping and the like of the pipeline in the rotating and stretching processes can be avoided. The pipeline can be guided to be far away from the structural part by arranging the first pipe clamp 4, the phenomena of winding, scraping and the like of the pipeline and a main body in the working process are avoided, and the pipeline allowance generated by the telescopic action can be controlled within the length range from the telescopic structure 2 to the first pipe clamp 4; the pipeline rotates along with the main structure when the rotating structure 1 rotates around the X axis, so that the pipeline is prevented from being twisted and bent, the reasonable bending radius of the pipeline is ensured, and the working medium in the pipeline flows smoothly.
Example 2:
referring to fig. 2, the present embodiment is different from embodiment 1 in that the first pipe clamp 4 is fixedly disposed on a connecting member of a second pipe clamp 5, the second pipe clamp 5 is rotatably disposed, and the pipeline 3 drives the second pipe clamp 5 to rotate. Preferably, the rotation axis of the second pipe clamp 5 is parallel to the rotation axis, and it should be noted that the parallel arrangement of the rotation axis and the rotation axis of the second pipe clamp is only an optimal arrangement, and the non-parallel arrangement of the rotation axis and the rotation axis of the second pipe clamp can also satisfy the requirement that the second pipe clamp rotates along with the pipeline. Referring to fig. 2, X1 is the rotation axis, and X2 is the rotation axis.
In this embodiment, the pipe 3 directly drives the second pipe clamp 5 to rotate, and the first pipe clamp only plays a role in fixing the pipe.
Example 3:
referring to fig. 3, the present embodiment is different from embodiment 1 in that the first pipe clamp 4 is rotatably disposed on a connecting member of the second pipe clamp 5, the second pipe clamp 5 is rotatably disposed, and the pipeline 3 drives the first pipe clamp 4 and the second pipe clamp 5 to rotate. Preferably, the rotation axis of the second pipe clamp 5 is parallel to the rotation axis, and it should be noted that the parallel arrangement of the rotation axis and the rotation axis of the second pipe clamp is only an optimal arrangement, and the non-parallel arrangement of the rotation axis and the rotation axis of the second pipe clamp can also satisfy the requirement that the second pipe clamp rotates along with the pipeline. Referring to fig. 3, the X-axis is the rotation axis of the rotating structure, X2 is the rotation axis of the second pipe clamp 5, and XY is the rotation axis of the first pipe clamp.
In the embodiment, the pipeline is restrained by the first pipe clamp and the second pipe clamp which are arranged in a rotating mode, and the pipeline is prevented from being held back, wound, twisted, scratched and the like through the rotation of the first pipe clamp and the second pipe clamp.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for dynamic pipe laying, in which the pipe (3) is subjected to a rotational movement about an axis of rotation and to a telescopic movement in a plane perpendicular to the axis of rotation, wherein a telescopic structure (2) for the telescopic movement is arranged on the rotational structure (1) for the rotational movement, characterized in that at least one point of the pipe (3) is restrained by means of a pipe clamp, which is arranged fixedly or movably and which is arranged independently of the rotational structure (1) and of the telescopic structure (2).
2. A dynamic pipe routing method according to claim 1, wherein the pipe clamps comprise a first pipe clamp (4) and a second pipe clamp (5), the first pipe clamp (4) being connected to the second pipe clamp (5), the pipe (3) passing through the first pipe clamp (4) and the second pipe clamp (5) in sequence, the first pipe clamp (4) and the second pipe clamp (5) constraining two points of the pipe (3) respectively.
3. A dynamic pipeline laying method according to claim 2, characterized in that controlling the distance between the first pipe clamp (4) and the rotating structure (1) controls the bending radius of the pipeline (3).
4. A method for dynamic pipeline layout according to claim 3, wherein the second pipe clamp (5) is fixedly arranged, the first pipe clamp (4) is rotatably arranged on a connecting piece of the second pipe clamp (5), the pipeline (3) drives the first pipe clamp (4) to rotate on the connecting piece, and the pipeline (3) is movably arranged on the second pipe clamp (5).
5. A method according to claim 4, characterized in that the second pipe clamp (5) is provided with a through slot through which the pipe (3) is arranged and in which the pipe (3) can slide; or the pipeline (3) is rotationally connected with a fixed pipeline section in the second pipe clamp (5).
6. A method according to claim 3, characterized in that the first pipe clamp (4) is fixedly arranged on a connecting piece of a second pipe clamp (5), the second pipe clamp (5) is rotatably arranged, and the pipeline (3) drives the second pipe clamp (5) to rotate.
7. A method according to claim 3, characterized in that the first pipe clamp (4) is rotatably arranged on a connecting piece of a second pipe clamp (5), the second pipe clamp (5) is rotatably arranged, and the pipeline (3) drives the first pipe clamp (4) and the second pipe clamp (5) to rotate.
8. A method according to any of claims 4-7, wherein the first pipe clamp (4) is arranged on an extension of the axis of rotation.
9. Method according to claim 8, wherein the angle between the axis of rotation of the first pipe clamp (4) and the axis of rotation is 0 ° -90 °.
10. A dynamic pipeline laying method according to claim 6 or 7, wherein the rotation axis of the second pipe clamp (5) is arranged parallel to the rotation axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110347565.7A CN113090818B (en) | 2021-03-31 | 2021-03-31 | Dynamic pipeline arrangement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110347565.7A CN113090818B (en) | 2021-03-31 | 2021-03-31 | Dynamic pipeline arrangement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113090818A true CN113090818A (en) | 2021-07-09 |
| CN113090818B CN113090818B (en) | 2022-12-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110347565.7A Active CN113090818B (en) | 2021-03-31 | 2021-03-31 | Dynamic pipeline arrangement method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113090818B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH579210A5 (en) * | 1973-11-08 | 1976-08-31 | Universale Hoch & Tiefbau | |
| DE3909212A1 (en) * | 1989-03-21 | 1990-09-27 | Putzmeister Maschf | Apparatus for introducing concrete into tunnel shutterings |
| JPH09184288A (en) * | 1995-12-28 | 1997-07-15 | Tobishima Corp | Concrete distributor and method |
| CN103993742A (en) * | 2014-05-26 | 2014-08-20 | 上海汽车改装厂有限公司 | Suspension type concrete spreader |
| CN105089678A (en) * | 2014-05-15 | 2015-11-25 | 中联重科股份有限公司 | Concrete spraying equipment and arm support system thereof |
| CN108716411A (en) * | 2018-08-02 | 2018-10-30 | 中铁工程装备集团有限公司 | Concrete spreader terminal mechanism and multiple degrees of freedom concrete distributing system |
| CN108798708A (en) * | 2017-04-27 | 2018-11-13 | 湖南五新隧道智能装备股份有限公司 | A kind of concrete spreader |
| CN110821522A (en) * | 2019-11-15 | 2020-02-21 | 湖南五新隧道智能装备股份有限公司 | Cloth dolly, concrete spreader and platform truck |
-
2021
- 2021-03-31 CN CN202110347565.7A patent/CN113090818B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH579210A5 (en) * | 1973-11-08 | 1976-08-31 | Universale Hoch & Tiefbau | |
| DE3909212A1 (en) * | 1989-03-21 | 1990-09-27 | Putzmeister Maschf | Apparatus for introducing concrete into tunnel shutterings |
| JPH09184288A (en) * | 1995-12-28 | 1997-07-15 | Tobishima Corp | Concrete distributor and method |
| CN105089678A (en) * | 2014-05-15 | 2015-11-25 | 中联重科股份有限公司 | Concrete spraying equipment and arm support system thereof |
| CN103993742A (en) * | 2014-05-26 | 2014-08-20 | 上海汽车改装厂有限公司 | Suspension type concrete spreader |
| CN108798708A (en) * | 2017-04-27 | 2018-11-13 | 湖南五新隧道智能装备股份有限公司 | A kind of concrete spreader |
| CN108716411A (en) * | 2018-08-02 | 2018-10-30 | 中铁工程装备集团有限公司 | Concrete spreader terminal mechanism and multiple degrees of freedom concrete distributing system |
| CN110821522A (en) * | 2019-11-15 | 2020-02-21 | 湖南五新隧道智能装备股份有限公司 | Cloth dolly, concrete spreader and platform truck |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113090818B (en) | 2022-12-09 |
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