CN109366445B - Electric displacement scriber and lofting method of pipeline intersecting line - Google Patents
Electric displacement scriber and lofting method of pipeline intersecting line Download PDFInfo
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- CN109366445B CN109366445B CN201811276484.7A CN201811276484A CN109366445B CN 109366445 B CN109366445 B CN 109366445B CN 201811276484 A CN201811276484 A CN 201811276484A CN 109366445 B CN109366445 B CN 109366445B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
- B25H7/00—Marking-out or setting-out work
- B25H7/04—Devices, e.g. scribers, for marking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
- B25H7/00—Marking-out or setting-out work
- B25H7/04—Devices, e.g. scribers, for marking
- B25H7/045—Devices, e.g. scribers, for marking characterised by constructional details of the marking elements
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- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention relates to an electric displacement scriber and a lofting method of a pipeline intersecting line, wherein the device comprises a screw rod sliding table and a line drawing device arranged on the screw rod sliding table, and the screw rod sliding table drives the line drawing device to move to draw a line according to displacement information; the line drawing device comprises a support, a driving mechanism and a line drawing mechanism; the driving mechanism and the line drawing mechanism are arranged on the support, and the output end of the driving mechanism is provided with a cam; the line drawing mechanism comprises a connecting rod, a driven base and a line drawing end, wherein the driven base and the line drawing end are respectively installed at two ends of the connecting rod, the driven base is always in contact with the cam, and the line drawing end is used for drawing lines on the circular tube. The lofting method adopts the electric displacement scriber, avoids the problems of complicated steps of the conventional two-dimensional three-view drawing method and high requirements on the space imagination ability and the image recognition level of constructors, can meet the lofting of the intersecting line when large pipelines are connected, and can also meet the lofting of the intersecting line of a special-shaped spiral body steel structure, thereby ensuring the lofting precision, reducing the operation labor difficulty and lowering the construction cost.
Description
Technical Field
The invention relates to the technical field of construction of complex steel structures, in particular to an electric displacement scriber and a lofting method of a pipeline intersecting line.
Background
When a plurality of pipes are connected, the intersection line formed at the joint between the pipes is called as an intersecting line. The pipeline intersecting line lofting is generally performed by: firstly, dividing the circumference of the pipeline into a plurality of equal parts through three orthographic projection views (three basic views, namely a front view, a top view and a left view), and determining the real length of each equal part of a prime line; then, the circumference of the bottom surface of the pipeline is expanded into a straight line, the actual length of each element line is drawn at each corresponding equal division point of the straight line, and the upper end points of each element line are connected by a curve to obtain an expansion diagram of the intersecting line of the pipeline; and finally, laying and lofting construction on the real object through the development pattern template.
The method is convenient for the construction of small-diameter pipelines, but the welding of large-diameter pipelines is usually placed on a rotary tire, and the conventional intersecting line unfolding pattern plate lofting technology needs to avoid the rotary tire, so that the positioning is inaccurate easily, and the installation precision is influenced.
In view of this, the curved surface lofting method needs to be invented, which can meet the requirements of large-diameter pipeline construction, ensure lofting accuracy, reduce operation labor difficulty and reduce construction cost.
Disclosure of Invention
The invention aims to solve the technical problems of the prior art and provides an electric displacement scriber and a lofting method of a pipeline intersecting line, which can efficiently finish the lofting work of the pipeline intersecting line, ensure the lofting precision, reduce the operation labor difficulty and reduce the construction cost.
The technical scheme adopted by the invention for solving the technical problems is as follows:
an electric displacement scriber comprises a screw rod sliding table and a scribing device arranged on the screw rod sliding table, wherein the screw rod sliding table drives the scribing device to move for scribing according to displacement information; the line drawing device comprises a support, a driving mechanism and a line drawing mechanism; the driving mechanism and the line drawing mechanism are arranged on the support, and the output end of the driving mechanism is provided with a cam; the line drawing mechanism comprises a connecting rod and a driven base and line drawing ends, the driven base and the line drawing ends are respectively installed at the two ends of the connecting rod, the driven base is always in contact with the cam, and the line drawing ends are used for drawing lines on the round pipe.
In the scheme, the support is provided with the base and the bracket respectively, the driving mechanism is installed on the base, one end of the connecting rod of the line drawing mechanism is connected with the line drawing end, and the other end of the connecting rod penetrates through the bracket and the driven base to be connected.
In the above scheme, the drawing end of the drawing mechanism is a self-adaptive adjusting structure, and comprises a pen point, a pen cap, a connecting rod sleeve, a pin shaft and a first spring; the pen point is arranged in the pen sleeve; the connecting rod sleeve is movably sleeved at the front end of the connecting rod and provided with a notch, the pin shaft penetrates through the notch to be fixedly connected with the connecting rod, the connecting rod and the connecting rod sleeve are prevented from loosening, and the pen cap is fixedly connected with the connecting rod sleeve; the connecting rod has a limiting plate fixedly mounted on one side of the line drawing end, a first spring is arranged between the limiting plate and the connecting rod sleeve, and the first spring is sleeved on the connecting rod, so that the pen point can be self-adaptive to the change of the ellipticity of the circular tube when in contact with the surface of the circular tube.
In the scheme, a second spring is arranged between the bracket and the driven base, the second spring is sleeved on the connecting rod, and the driven base is provided with the roller, so that the rotating motion of the cam pushes the connecting rod to move in a reciprocating mode, and the roller is always in contact with the cam under the action of the second spring.
In the above scheme, the lead screw slip table includes base, lead screw, bearing frame, slip table seat, step motor and shaft coupling, the both ends of lead screw are passed through the bearing frame with base fixed connection, the slip table is installed on the slip table seat, through slip table seat and lead screw threaded connection, step motor passes through the shaft coupling is connected with the lead screw to it is rotatory to drive the lead screw, drives the slip table displacement.
In the above scheme, the upper surface of base is equipped with spacing rail, the slip table bottom be equipped with spacing rail matched's stopper, the stopper uses spacing rail to remove as the route.
In the above scheme, the lower part of the support is provided with the connecting plate, and the connecting plate is fixedly connected with the sliding table.
The invention also provides a lofting method of the pipeline intersecting line, which adopts the electric displacement scriber to loft, and specifically comprises the following steps:
step 1, firstly, establishing three-dimensional models of a main pipe and a branch pipe, dividing bodies respectively by the axis annular array of the main pipe and the branch pipe, and subtracting the divided bodies from the main pipe and the branch pipe respectively to form a pipeline intersection line;
step 2, expanding the circumference of the bottom surface of the pipeline into a straight line, drawing the actual length of each element line at each corresponding equal division point of the straight line, and connecting the upper end points of each element line by using a curve to obtain an expanded view of the intersecting line of the pipeline;
and 3, erecting an electric displacement scriber on one side of the circular tube, enabling the height of a pen touch to be horizontal to the center of the circular tube, converting the actual length information of the plain lines into displacement information of the electric displacement scriber, namely enabling the circular tube to rotate on a rotating tire for one circle, and sequentially completing displacement of adjacent difference values of all the plain lines by the electric displacement scriber so as to quickly complete drawing of the intersecting lines of the pipeline.
The invention has the beneficial effects that:
1. the main pipe and branch pipe three-dimensional models are drawn in the AutoCAD, then the main pipe and branch pipe are respectively divided into the bodies by the axis annular arrays of the main pipe and the branch pipe, and the main pipe and the branch pipe are respectively subtracted from the divided bodies to quickly form a pipeline intersecting line plain line, so that the problems of complicated steps, high requirements on space imagination capacity and image recognition level of constructors, and the problems of intersection line formation by one-by-one projection and point seeking in a conventional two-dimensional three-view drawing method are solved.
2. The electric displacement scriber is erected on one side of the pipeline, the length information of the element lines is converted into the displacement information of the electric displacement scriber, the pipeline rotates for a circle on the rotary tire, the electric displacement scriber sequentially completes the displacement of adjacent difference values of all the element lines, the drawing of the pipeline intersection lines is rapidly completed, and the problems that when a large-diameter pipeline intersection line placed on the rotary tire is lofted, the rotary tire needs to be avoided, the pipeline surface is segmented and relay lofted, the positioning is inaccurate, and the construction of the installation precision is affected are solved.
3. The method can meet the layout of the intersecting line when the large-scale pipeline is connected, and can also meet the layout of the intersecting line of a process steel structure such as a deformed spiral body (spiral line) steel structure, thereby ensuring the layout precision, reducing the operation labor difficulty and reducing the construction cost.
4. The electric displacement scriber can realize the drawing of a dotted line and a solid line so as to distinguish complex line types.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic view of the construction of an electrically-actuated displacement line striper of the present invention;
figure 2 is a schematic view of an alternative angular configuration of the electrically-actuated displacement line striper of figure 1;
fig. 3 is a schematic view of the line striping apparatus of the electrically-actuated displacement line striper of fig. 1;
fig. 4 is a schematic view of an alternative angular configuration of the line striping apparatus of fig. 3;
FIG. 5 is a schematic view of the structure of the intersecting line of the tee pipe;
FIG. 6 is a schematic view of the pipeline axis circular array segment in step 1 of the method of the present invention;
FIG. 7 is a schematic view of the method of the present invention, step 1, forming a plain line of tubing;
FIG. 8 is a top view of FIG. 7;
FIG. 9 is an expanded view of the main tube shown in FIG. 7;
FIG. 10 is an expanded view of the manifold of FIG. 7;
FIG. 11 is a schematic diagram of the method of the present invention.
In the figure: 100. an electrically-driven displacement scriber; 10. a screw rod sliding table; 11. a base; 12. a screw rod; 13. a bearing seat; 14. a sliding table; 15. a slide pedestal; 16. a limiting block; 17. a limit rail; 18. a stepping motor; 19. a coupling; 20. a line drawing device; 21. a support; 211. a base; 212. a bracket; 213. a connecting plate; 22. a drive mechanism; 23. a cam; 24. a line drawing mechanism; 241. a connecting rod; 2411. a limiting plate; 242. a driven base; 2421. a roller; 243. a pen point; 244. a pen cap; 245. knob jackscrew; 246. a connecting rod sleeve; 247. a pin shaft; 248. a first spring; 249. a second spring; 201. a main pipe; 202. a branch pipe; 203. intersecting lines; 204. dividing the body; 205. a plain thread; 300. a circular tube; 400. and (5) rotating the tire.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 4, an electric displacement scriber 100 according to a preferred embodiment of the present invention includes a screw rod slide 10 and a scriber 20 mounted on the screw rod slide 10, wherein the screw rod slide 10 drives the scriber 20 to move for scribing according to displacement information. The line striping apparatus 20 comprises a support 21, a drive mechanism 22 and a line striping mechanism 24. The driving mechanism 22 and the line drawing mechanism 24 are mounted on the support 21, and the output end of the driving mechanism 22 is provided with the cam 23, so that the line drawing mechanism 24 is intermittently pushed to contact with the circular tube 300, and the drawing of the dotted line is completed. The line drawing mechanism 24 includes a connecting rod 241, and a driven base 242 and a line drawing end which are respectively installed at two ends of the connecting rod 241, wherein the driven base 242 is always in contact with the cam 23, and the line drawing end is used for drawing a line on the circular tube 300. The drive mechanism 22 is driven and controlled by a reduction motor and power supplied from a portable power source. When the driving mechanism 22 is not operated, the drawing end draws a solid line on the circular tube 300, and when the driving mechanism 22 is operated, the drawing end draws a dotted line on the circular tube 300 to distinguish complex line types.
Preferably, in the present embodiment, the base 211 and the bracket 212 are respectively provided on the support 21, the driving mechanism 22 is mounted on the base 211, one end of the link 241 of the line drawing mechanism 24 is connected to the line drawing end, and the other end passes through the bracket 212 and is connected to the driven base 242.
Further preferably, in the present embodiment, the line drawing end of the line drawing mechanism 24 is a self-adaptive adjusting structure, and includes a pen point 243, a pen cap 244, a knob jack 245, a connecting rod cap 246, a pin 247, and a first spring 248. The pen point 243 is arranged in the pen cap 244 and is fixed through a knob jackscrew 245; the connecting rod 241 is a cylinder, the connecting rod sleeve 246 is movably sleeved at the front end of the connecting rod 241, the connecting rod sleeve 246 is provided with a notch, the pin roll 247 penetrates through the notch to be fixedly connected with the connecting rod 241, the connecting rod 241 and the connecting rod sleeve 246 are prevented from loosening, and the pen cap 244 is fixedly connected with the connecting rod sleeve 246; a limiting plate 2411 is fixedly arranged on one side of the line drawing end of the connecting rod 241, a first spring 248 is arranged between the limiting plate 2411 and the connecting rod sleeve 246, and the first spring 248 is sleeved on the connecting rod 241 so as to be capable of adapting to the change of the ovality of the circular tube 300 when the pen point 243 is in contact with the surface of the circular tube 300.
Further preferably, in this embodiment, a second spring 249 is disposed between the bracket 212 and the driven base 242, the second spring 249 is sleeved on the connecting rod 241, and the driven base 242 is provided with a roller 2421, so that the rotating motion of the cam 23 reciprocally pushes the connecting rod 241 to move, and the roller 2421 is always in contact with the cam 23 under the action of the second spring 249.
Further optimize, in this embodiment, lead screw slip table 10 includes base 11, lead screw 12, bearing frame 13, slip table 14, slip table seat 15, step motor 18 and shaft coupling 19, and the both ends of lead screw 12 are through bearing frame 13 and base 11 fixed connection, and slip table 14 is installed on slip table seat 15, through slip table seat 15 and lead screw 12 threaded connection, step motor 18 passes through shaft coupling 19 and is connected with lead screw 12 to drive lead screw 12 is rotatory, drives slip table 14 displacement.
Further optimize, in this embodiment, the upper surface of base 11 is equipped with spacing rail 17, and slip table 14 bottom is equipped with the stopper 16 that matches with spacing rail 17, and stopper 16 uses spacing rail 17 to remove as the route.
Further preferably, in the present embodiment, a connecting plate 213 is disposed at a lower portion of the support 21, and the connecting plate 213 is fixedly connected to the sliding table 14.
When the electric displacement scriber 100 is used, the scribing mechanism 24 is tightly attached to the outer wall of the circular tube 300, the length information of the intersecting line of the pipeline is converted into the displacement information of the electric displacement scriber 100, namely, the pipeline rotates on the rotating tire for one circle, and the electric displacement scriber 100 finishes the displacement of the adjacent difference values of all the intersecting lines in sequence, so that the drawing of the intersecting line of the pipeline can be finished.
The invention also provides a lofting method of the pipeline intersecting line, which adopts the electric displacement scriber 100 to perform lofting work and specifically comprises the following steps:
step 1, drawing three-dimensional models of a main pipe 201 and a branch pipe 202 in AutoCAD, dividing a body 204 by an axial center annular array of the main pipe 201 and the branch pipe 202, and subtracting the divided bodies 204 from the main pipe 201 and the branch pipe 202 to form a pipeline intersecting line 205. The method avoids the problems that the conventional two-dimensional three-view drawing method projects and solves points one by one, and finally, the connection lines form intersecting lines, the steps are complicated, and the requirements on the space imagination ability and the map recognition level of constructors are high.
And 2, unfolding the circumference of the bottom surface of the pipeline into a straight line, drawing the actual length of each element line 205 at each corresponding equal division point of the straight line, and connecting the upper end points of each element line 205 by using a curve to obtain an unfolded drawing of the intersecting line 203 of the pipeline.
And 3, placing the circular tube 300 on the rotary tire 400, erecting the electric displacement scriber 100 on one side of the circular tube 300, enabling the height of a pen touch to be horizontal to the center of the circular tube 300, converting the actual length information of the plain lines 205 into displacement information of the electric displacement scriber 100, namely, rotating the circular tube 300 on the rotary tire 400 for one circle, and sequentially completing the displacement of adjacent difference values of all the plain lines 205 by the electric displacement scriber 100 to quickly complete the drawing of the intersecting lines 203 of the pipelines. The problems that when a large-diameter pipeline intersecting line placed on a rotary tire is subjected to lofting, the rotary tire needs to be avoided, and sectional and relay lofting are carried out on the surface of the pipeline, so that inaccurate positioning is easily caused, and the construction of installation precision is influenced are solved.
The electric displacement scriber 100 and the lofting method of the pipeline intersecting line can meet the lofting of the intersecting line when a large-scale pipeline is connected, and can also meet the lofting of the intersecting line of a process steel structure such as a special-shaped spiral body (spiral line) steel structure, and the electric displacement scriber 100 can realize the drawing of a dotted line and a solid line so as to distinguish complex line types.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (4)
1. A lofting method of a pipeline intersecting line is characterized in that an electric displacement scriber is adopted for lofting, the electric displacement scriber comprises a screw rod sliding table and a line drawing device installed on the screw rod sliding table, and the screw rod sliding table drives the line drawing device to draw lines according to displacement information; the line drawing device comprises a support, a driving mechanism and a line drawing mechanism; the support is respectively provided with a base and a bracket, the driving mechanism is arranged on the base, and the output end of the driving mechanism is provided with a cam; the line drawing mechanism comprises a connecting rod penetrating through the bracket, and a driven base and a line drawing end which are respectively arranged at two ends of the connecting rod, wherein a second spring is arranged between the bracket and the driven base, the second spring is sleeved on the connecting rod, a roller is arranged on the driven base, so that the rotating motion of the cam can push the connecting rod to move in a reciprocating manner, the roller is always in contact with the cam under the action of the second spring, and the line drawing end is used for drawing a line on a circular tube; the drawing line end is of a self-adaptive adjusting structure and comprises a pen point, a pen sleeve, a connecting rod sleeve, a pin shaft and a first spring; the pen point is arranged in the pen sleeve; the connecting rod sleeve is movably sleeved at the front end of the connecting rod and provided with a notch, the pin shaft penetrates through the notch to be fixedly connected with the connecting rod, the connecting rod and the connecting rod sleeve are prevented from loosening, and the pen cap is fixedly connected with the connecting rod sleeve; a limiting plate is fixedly arranged on one side of the line drawing end of the connecting rod, a first spring is arranged between the limiting plate and the connecting rod sleeve, and the first spring is sleeved on the connecting rod, so that the change of the ellipticity of the circular tube can be self-adapted when the pen point is in contact with the surface of the circular tube;
the lofting method of the pipeline intersecting line specifically comprises the following steps:
step 1, firstly, establishing three-dimensional models of a main pipe and a branch pipe, dividing bodies respectively by the axis annular array of the main pipe and the branch pipe, and subtracting the divided bodies from the main pipe and the branch pipe respectively to form a pipeline intersection line;
step 2, expanding the circumference of the bottom surface of the pipeline into a straight line, drawing the actual length of each element line at each corresponding equal division point of the straight line, and connecting the upper end points of each element line by using a curve to obtain an expanded view of the intersecting line of the pipeline;
and 3, erecting an electric displacement scriber on one side of the circular tube, enabling the height of a pen touch to be horizontal to the center of the circular tube, converting the actual length information of the plain lines into displacement information of the electric displacement scriber, namely enabling the circular tube to rotate on a rotating tire for one circle, and sequentially completing displacement of adjacent difference values of all the plain lines by the electric displacement scriber so as to quickly complete drawing of the intersecting lines of the pipeline.
2. The laying-out method of the pipeline intersecting line according to claim 1, wherein the screw rod sliding table comprises a base, a screw rod, a bearing seat, a sliding table seat, a stepping motor and a coupler, two ends of the screw rod are fixedly connected with the base through the bearing seat, the sliding table is installed on the sliding table seat, the sliding table seat is in threaded connection with the screw rod, and the stepping motor is connected with the screw rod through the coupler and drives the screw rod to rotate so as to drive the sliding table to displace.
3. The method for lofting the intersecting line of the pipelines according to claim 2, wherein the upper surface of the base is provided with a limiting rail, the bottom of the sliding table is provided with a limiting block matched with the limiting rail, and the limiting block moves by taking the limiting rail as a path.
4. The method of claim 2, wherein a connecting plate is provided at a lower portion of the support, and the connecting plate is fixedly connected to the slide.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811276484.7A CN109366445B (en) | 2018-10-30 | 2018-10-30 | Electric displacement scriber and lofting method of pipeline intersecting line |
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| CN201811276484.7A CN109366445B (en) | 2018-10-30 | 2018-10-30 | Electric displacement scriber and lofting method of pipeline intersecting line |
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| CN109366445B true CN109366445B (en) | 2022-01-25 |
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| CN110091061B (en) * | 2019-06-10 | 2021-02-05 | 武夷学院 | Simple laser intersecting line cutting machine |
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| CN109366445A (en) | 2019-02-22 |
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