CN112504059A - Surveying and mapping device for saddle opening of pipeline - Google Patents

Surveying and mapping device for saddle opening of pipeline Download PDF

Info

Publication number
CN112504059A
CN112504059A CN202011536915.6A CN202011536915A CN112504059A CN 112504059 A CN112504059 A CN 112504059A CN 202011536915 A CN202011536915 A CN 202011536915A CN 112504059 A CN112504059 A CN 112504059A
Authority
CN
China
Prior art keywords
movable
movable base
guide rail
base band
circular ring
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.)
Pending
Application number
CN202011536915.6A
Other languages
Chinese (zh)
Inventor
樊春涛
卿勇
陈晨
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Petroleum Natural Gas Sixth Construction Co ltd
Original Assignee
China Petroleum Natural Gas Sixth Construction Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by China Petroleum Natural Gas Sixth Construction Co ltd filed Critical China Petroleum Natural Gas Sixth Construction Co ltd
Priority to CN202011536915.6A priority Critical patent/CN112504059A/en
Publication of CN112504059A publication Critical patent/CN112504059A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00Measuring arrangements characterised by the use of mechanical techniques
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/20Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)

Abstract

The invention discloses a surveying and mapping device for a pipeline saddle port, which comprises a plurality of movable rods and movable base bands, wherein the movable rods are provided with a plurality of movable base bands; the movable base belt is provided with a plurality of guide rails distributed along the length direction of the movable base belt, and each guide rail is provided with more than one movable rod matched with the guide rail; all the movable rods are connected to the guide rail in a side-by-side mode, can slide along the length direction of the movable rods and are locked, and can extend out of the movable base band; the movable base band comprises a circular ring state, when the movable base band is in the circular ring state, two ends of the movable base band in the length direction are connected to form a circular ring shape, and the length direction of the movable base band is consistent with the axis direction of the circular ring formed by the movable base band. The user can utilize the mapping device of this kind of pipeline saddle mouth to measure and rule at the job site direct measurement saddle mouth, and the effective repeatedly usable of easy operation has greatly reduced the construction degree of difficulty and cost.

Description

Surveying and mapping device for saddle opening of pipeline
Technical Field
The invention relates to the technical field of pipeline saddle opening cutting, in particular to a surveying and mapping device for a pipeline saddle opening.
Background
As pipe structures are more and more widely applied to various industries, the processing difficulty of the pipe structures is reflected, in the connection of the pipe structures, more than two pipes are inevitably required to be connected in a cross mode, the intersection of a main pipe and a branch pipe is a pipe joint, and an opening at the pipe joint is called a saddle opening due to the shape of a saddle. And because of the special shape of the pipe, the intersecting line at the saddle opening is a three-dimensional space curve, which is difficult to directly measure and position, a saddle opening development figure needs to be drawn in advance, a sample plate is made according to the saddle opening development figure, then the sample plate is used for drawing a line on the steel pipe, and finally the required saddle opening is cut according to the drawn line.
In the existing saddle mouth measuring and marking method, a constructor can directly mark a line on a pipeline according to own experience for rapidness and convenience, but the precision of the method is difficult to ensure and other people are difficult to learn and copy. Another more accurate method is a CAD projection method, which collects data of the main pipe and the branch pipe, then uses the data to draw and calculate on CAD and other software, and then obtains a saddle opening development. However, the drawing method in the mode has higher requirement on measurement accuracy and depends on a computer and software; more importantly, the requirement on the professional performance of drawing personnel is high, and general site operators are difficult to draw lines by the method, so that special engineers are equipped to follow the whole connection processing process, and the labor cost is high.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the pipeline saddle opening surveying and mapping device, a user can directly measure the saddle opening on a construction site for measurement and marking, the operation is simple, the device is effective and can be repeatedly used, and the construction difficulty and the construction cost are greatly reduced.
The purpose of the invention is realized by adopting the following technical scheme:
a surveying and mapping device for a pipeline saddle opening comprises a movable rod and a movable base band,
the movable rod is provided with a plurality of rods;
the movable base belt is provided with a plurality of guide rails distributed along the length direction of the movable base belt, and each guide rail is provided with more than one movable rod matched with the guide rail; all the movable rods are connected to the guide rail in a side-by-side mode, can slide along the length direction of the movable rods and are locked, and can extend out of the movable base band;
the movable base band comprises a circular ring state, when the movable base band is in the circular ring state, two ends of the movable base band in the length direction are connected to form a circular ring shape, and the length direction of the movable base band is consistent with the axis direction of the circular ring formed by the movable base band.
Furthermore, the movable base band also comprises an unfolding state, and when the movable base band is in the unfolding state, the movable base band is in a straight strip shape, and the movable rods connected to the guide rails are on the same plane.
Further, the movable base band comprises a first base band and a second base band, the guide rail comprises a first guide rail and a second guide rail, the first guide rail is arranged on the first base band, and the second guide rail is arranged on the second base band; each movable rod is simultaneously connected with more than one first guide rail and more than one second guide rail in a sliding mode.
Furthermore, a plurality of first mounting holes are formed in the movable base band along the length direction of the movable base band, each guide rail is provided with a second mounting hole, and a bolt is further arranged to penetrate through the first mounting holes and the second mounting holes to connect the guide rails and the movable base.
Further, the guide rail can be reversibly deformed, and the cross section of the guide rail is C-shaped; when the guide rail deforms to the inner space larger than the outer diameter of the movable rod, the movable rod can slide in the guide rail; when the guide rail deforms to abut against the movable rod, the movable rod is locked.
Further, the movable rod comprises a writing pen at the bottom, and the pen point of the writing pen extends out of the guide rail from the lower part.
Further, the pen point of the writing pen is gradually inclined towards one side of the movable base band.
Further, the movable rod further comprises a scale, the scale is connected to the upper end of the writing pen, and length scales are arranged on the scale.
Furthermore, the movable base band and the guide rail are made of deformable flexible stainless steel materials.
Further, when the circular ring is in the circular ring state, the inner diameter of a circular ring formed by the base band is 60 mm-610 mm, and the distance between every two adjacent movable rods is 21 mm-24 mm.
The prior art saddle mouth mapping device has several drawbacks, and the present invention improves upon these drawbacks. Wherein, the activity baseband provides the basis for the slip of movable rod, and the movable rod stretches out from slidable on the activity baseband and contacts with the body. The movable base band in the circular ring state and the movable rods distributed in the axial direction form an approximate tubular structure together, and the approximate tubular structure is used as a simulation pipe of a branch pipe which is required to be connected with a main pipe. Different from the common branch pipe, the shape of the lower end of the simulation pipe can be changed, when the simulation pipe is used, the lower end of the movable rod slides along the guide rail to be attached to the surface of the main pipe, the position of the movable rod is locked and fixed after the lower end of the movable rod is completely matched with the shape of the outer part of the main pipe, and at the moment, the arc line formed by the lower ends of all the movable rods together is the arc line shape of the saddle opening.
In conclusion, the surveying and mapping device in the scheme can simply and directly measure the complex three-dimensional curve of the saddle opening on the construction site, the complex previous-stage size measurement is omitted, the analysis and calculation of a computer are not needed, construction operators do not need to have rich freehand drawing experience, good computer software using capacity is also not needed, and the difficulty, manpower and material resources of saddle opening processing construction can be greatly saved.
Drawings
FIG. 1 is a circular perspective view of a device for measuring saddle opening of pipeline according to the present invention;
fig. 2 is a perspective view of the deployed state of the surveying and mapping device for the saddle port of the pipeline.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present.
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. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Fig. 1-2 show a surveying and mapping device for a saddle opening of a pipeline, which comprises a plurality of movable rods 1 and a movable base band 2, wherein the number of the movable rods 1 is preferably large, and the larger the number of the movable rods 1 is, the more the curve formed is closer to the actual saddle opening curve;
as the fixed foundation of the movable rod 1, the movable base band 2 is provided with a plurality of guide rails 3 distributed along the length direction of the movable base band, and each guide rail 3 is provided with more than one movable rod 1 matched with the guide rails; all the movable bars 1 are connected side by side to the guide rail 3, and the movable bars 1 can slide and be locked along the length direction thereof so as to slide in a substantially parallel direction; the width of the movable base band 2 can be set as required, but it is necessary to ensure that the movable rod 1 can extend out of the movable base band 2 to ensure that the movable rod 1 has a curve that can be formed beyond the movable base band 2. Wherein all the movable rods may be uniform or non-uniform in length, and only the non-uniformity is shown in the figures.
As shown in fig. 1, the movable base band 2 includes a circular ring shape, when in the circular ring shape, two ends of the movable base band 2 in the length direction are connected to form a circular ring shape, and the length direction of the movable rod 1 is in accordance with the axial direction of the circular ring formed by the movable base band 2. The movable base band 2 in the circular ring state and the movable rods 1 distributed in the axial direction form an approximate tubular structure together, and the approximate tubular structure is used as a simulation pipe of a branch pipe which is required to be connected with a main pipe. Different from a common branch pipe, the shape of the lower end of the simulation pipe can be changed, when the simulation pipe is used, the lower end of the movable rod 1 slides along the guide rail 3 to be attached to the surface of the main pipe, the position of the movable rod 1 is locked and fixed after the lower end of the movable rod 1 is completely matched with the shape of the outer part of the main pipe, and at the moment, an arc line formed by the lower ends of all the movable rods 1 together is the arc line shape of a saddle opening.
As shown in fig. 2, in order to perform other operations after the step of measuring the saddle mouth curve is completed in the circular ring state, the movable base band 2 further includes an unfolded state, and when the movable base band is in the unfolded state, the movable base band 2 is in a straight strip shape, and the movable rods 1 connected to the guide rails 3 are on the same plane. Since the circular ring is a simulated pipe of the branch pipe, but it is difficult to copy the curve to the real branch pipe while maintaining the circular ring, the whole surveying and mapping device can be wrapped on the branch pipe after the measurement is completed, and then the saddle line on the branch pipe is drawn according to the curve at the lower end of the movable rod 1. In addition, since the movable base band 2 is actually an expansion diagram of the saddle opening after being expanded, the saddle opening formed by connecting lines of the lower ends of all the movable rods is a smooth curve in a sine wave shape, and can be tiled on a sample plate to manufacture a proper sample plate for use.
As a preferable scheme of the movable base band 2, the movable base band 2 includes a first base band 21 and a second base band 22, the guide rail 3 includes a first guide rail 31 and a second guide rail 32, the first guide rail 31 is disposed on the first base band 21, and the second guide rail 32 is disposed on the second base band 22; each movable rod 1 is connected with more than one first guide rail 31 and more than one second guide rail 32 in a sliding mode, and compared with the connection and fixation of a single guide rail 3, the movable rods 1 can be connected with more than two guide rails 3 more stably, the sliding directions of the movable rods are more definite, and the movable rods are not prone to shifting.
As the preferred connected mode of guide rail 3 and activity baseband 2, the first mounting hole of a plurality of has been seted up along its length direction on the activity baseband 2, every be equipped with the second mounting hole on the guide rail 3, still be equipped with bolt 4 and pass first mounting hole and second mounting hole connect guide rail 3 and movable base, and the connection of this kind of mode is comparatively simple nimble, is convenient for change. However, the back of the guide rail 3 may be directly welded or glued to the movable base band 2, and all of them are within the protection scope of the present invention.
In the aspect of locking and fixing the movable rod 1 and the guide rail 3, the embodiment preferably adopts a scheme that the guide rail 3 can be reversibly deformed, the cross section of the guide rail 3 is in a C shape, the C shape can limit the movable rod 1 in the inner space of the guide rail 3, the semi-open structure is convenient for changing the diameter of the guide rail, and the guide rail can adapt to the movable rods 1 with different thicknesses. When the guide rail 3 is deformed to an inner space larger than the outer diameter of the movable rod 1, the movable rod 1 can slide in the guide rail 3; when the guide rail 3 deforms to abut against the movable rod 1, the movable rod 1 is locked, and the position of the movable rod 1 is fixed, so that the movable rod 1 moves to break the measured saddle shape in the next process.
In order to further save the working procedures and improve the working efficiency, the movable rod 1 comprises a writing pen 11 at the bottom, the pen point of the writing pen 11 extends out of the guide rail 3 from the bottom, the writing pen 11 carried by the movable rod 1 can directly draw marks on the outer side surfaces of the branch pipe and the main pipe, and the working procedures of manufacturing templates can be omitted even without additionally preparing a marking tool during operation. The pen point of the writing pen 11 is gradually inclined towards the movable base band 2 side, so that the pen point is prevented from having a certain distance with the outer side of the tube due to the diameter of the movable rod 1 during scribing, and accurate scribing is difficult. Because when the mapping device subsides in this scheme were put and is used for measuring the saddle mouth in being responsible for, whole slope skew may take place, in order to guarantee the precision, movable rod 1 still includes scale 12, scale 12 connect in writing pen 11 upper end is equipped with the length scale on the scale 12 to directly read out the distance of removal when removing movable rod 1, just can learn whether slope through the distance that the movable rod 1 of comparing both sides removed.
In terms of material selection, the movable base band 2 and the guide rail 3 are made of deformable flexible stainless steel materials so as to realize switching between the circular ring state and the unfolded state of the movable base band 2, and the guide rail 3 is switched between two states of locking the movable rod 1 and unlocking the movable rod 1.
In a specific size, when in the ring shape, the inner diameter of the ring formed by the base belt is 60 mm-610 mm, because the branch pipes preferably adopted in the embodiment are international standard specifications, the common specifications are phi 60.3mm, phi 73mm, phi 88.9mm, phi 114.3mm, phi 168.3mm, phi 219.1mm, phi 273.1mm, phi 323.9mm, phi 406.4mm, phi 508mm and phi 610mm, the number of the movable rods is increased along with the increase of the diameter, but the distance between two adjacent movable rods is required to be ensured to be 21 mm-24 mm, and the arrangement can maintain the proper scribing density and does not influence the sliding and locking of the movable rods 1.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims (10)

1. A surveying and mapping device for a pipeline saddle opening is characterized by comprising a movable rod and a movable base band,
the movable rod is provided with a plurality of rods;
the movable base belt is provided with a plurality of guide rails distributed along the length direction of the movable base belt, and each guide rail is provided with more than one movable rod matched with the guide rail; all the movable rods are connected to the guide rail in a side-by-side mode, can slide along the length direction of the movable rods and are locked, and can extend out of the movable base band;
the movable base band comprises a circular ring state, when the movable base band is in the circular ring state, two ends of the movable base band in the length direction are connected to form a circular ring shape, and the length direction of the movable base band is consistent with the axis direction of the circular ring formed by the movable base band.
2. The apparatus for surveying and mapping a pipe saddle opening as claimed in claim 1, wherein said movable base strip further comprises a deployed state in which said movable base strip is in a straight shape and the movable rods connected to said guide rails are in the same plane.
3. The apparatus for mapping the saddle port of a pipeline of claim 2, wherein the movable base strip comprises a first base strip and a second base strip, the guide track comprises a first guide track and a second guide track, the first guide track is disposed on the first base strip, and the second guide track is disposed on the second base strip; each movable rod is simultaneously connected with more than one first guide rail and more than one second guide rail in a sliding mode.
4. The apparatus for measuring and mapping the opening of a pipe saddle as claimed in claim 1, wherein the movable base band has a plurality of first holes formed along the length thereof, each of the guide rails has a second hole, and a bolt is inserted through the first and second holes to connect the guide rail and the movable base.
5. The apparatus for surveying and mapping a pipe saddle port as claimed in any one of claims 1 to 4, wherein the guide rail is reversibly deformable and has a C-shaped cross-section; when the guide rail deforms to the inner space larger than the outer diameter of the movable rod, the movable rod can slide in the guide rail; when the guide rail deforms to abut against the movable rod, the movable rod is locked.
6. The apparatus for mapping the saddle port of a pipeline of claim 1, wherein the movable rod comprises a bottom writing pen, the tip of which extends from below to the guide rail.
7. The apparatus for measuring the diameter of a pipe saddle as claimed in claim 6, wherein the tip of said writing pen is inclined gradually toward the side of said movable base band.
8. The apparatus for measuring and mapping the opening of a pipe saddle as claimed in claim 6, wherein said movable rod further comprises a scale, said scale is connected to the upper end of said writing pen, and length scales are provided on said scale.
9. The apparatus for measuring the diameter of a pipe saddle as claimed in claim 1, wherein said movable base strip and guide track are flexible deformable stainless steel.
10. The apparatus for measuring the diameter of a pipe saddle according to claim 1, wherein the base band forms a circular ring with an inner diameter of 60mm to 610mm and a distance between two adjacent movable rods of 21mm to 24mm when the circular ring is in the circular state.
CN202011536915.6A 2020-12-23 2020-12-23 Surveying and mapping device for saddle opening of pipeline Pending CN112504059A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011536915.6A CN112504059A (en) 2020-12-23 2020-12-23 Surveying and mapping device for saddle opening of pipeline

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011536915.6A CN112504059A (en) 2020-12-23 2020-12-23 Surveying and mapping device for saddle opening of pipeline

Publications (1)

Publication Number Publication Date
CN112504059A true CN112504059A (en) 2021-03-16

Family

ID=74923503

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011536915.6A Pending CN112504059A (en) 2020-12-23 2020-12-23 Surveying and mapping device for saddle opening of pipeline

Country Status (1)

Country Link
CN (1) CN112504059A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113043238A (en) * 2021-04-26 2021-06-29 中国十九冶集团有限公司 Pipeline opening and scribing positioning device and scribing method

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1364701A (en) * 2001-01-10 2002-08-21 杨延虎 On-spot sampling ruler for pipe joint
CN207384223U (en) * 2017-05-11 2018-05-22 巫建烽 A kind of besom
CN108274446A (en) * 2018-03-26 2018-07-13 吕守平 Pipe intersecting lines imitate type scriber
TWM563854U (en) * 2017-11-28 2018-07-21 游恒毅 Scraping device structure of cleaning appliance
CN110076745A (en) * 2019-06-03 2019-08-02 包头钢铁(集团)有限责任公司 Steel pipe construction lofting tools and setting out method
CN210060207U (en) * 2019-04-30 2020-02-14 河南方圆工业炉设计制造有限公司 Marking off auxiliary device of circular pipeline looks transversal
CN210233000U (en) * 2019-06-28 2020-04-03 鲁西工业装备有限公司 Intersecting line lofting tool
CN210551161U (en) * 2019-08-09 2020-05-19 山西省工业设备安装集团有限公司 Pipeline tee bend welded junction marking tool

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1364701A (en) * 2001-01-10 2002-08-21 杨延虎 On-spot sampling ruler for pipe joint
CN207384223U (en) * 2017-05-11 2018-05-22 巫建烽 A kind of besom
TWM563854U (en) * 2017-11-28 2018-07-21 游恒毅 Scraping device structure of cleaning appliance
CN108274446A (en) * 2018-03-26 2018-07-13 吕守平 Pipe intersecting lines imitate type scriber
CN210060207U (en) * 2019-04-30 2020-02-14 河南方圆工业炉设计制造有限公司 Marking off auxiliary device of circular pipeline looks transversal
CN110076745A (en) * 2019-06-03 2019-08-02 包头钢铁(集团)有限责任公司 Steel pipe construction lofting tools and setting out method
CN210233000U (en) * 2019-06-28 2020-04-03 鲁西工业装备有限公司 Intersecting line lofting tool
CN210551161U (en) * 2019-08-09 2020-05-19 山西省工业设备安装集团有限公司 Pipeline tee bend welded junction marking tool

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113043238A (en) * 2021-04-26 2021-06-29 中国十九冶集团有限公司 Pipeline opening and scribing positioning device and scribing method

Similar Documents

Publication Publication Date Title
US9731545B2 (en) Pivoting construction square and multipurpose measuring tool
CN112504059A (en) Surveying and mapping device for saddle opening of pipeline
CN206459587U (en) Measuring tool
US7793421B2 (en) Archway measuring device
CN208398761U (en) A kind of bend pipe dimensional gaughing jig
CN103575191B (en) The proving installation of foundation model test failure surface
CN207248185U (en) A kind of hull survey line line reverser
CN1987339A (en) Arc radius measurer
CN205175279U (en) Device is confirmed to connecting hole hole site of roll table base
CN213858169U (en) Nonrust steel pipe cutting device
CN111638275B (en) Measuring point positioning device for detecting strength of concrete beam column member by ultrasonic rebound method
CN209858485U (en) Measuring point positioning device suitable for measuring concrete strength by ultrasonic rebound method
CN208895950U (en) A kind of bracket for small pipeline hardness and metal lographic examination
CN207127865U (en) A kind of portable cable crane span structure elbow line mould
JP2013072830A (en) Bend pipe measurement jig
CN212282160U (en) Telescopic bone length sizing-dividing folding ruler
CN214643578U (en) Pipeline outer wall straight line calibration tool
JPH0875401A (en) Crossing angle and distance measuring ruler
CN216433999U (en) DAC curve calibrator
CN216683859U (en) Multifunctional semicircular ruler
CN211953904U (en) Multifunctional steel ruler
CN105241342B (en) The connecting hole hole position determining device of roller-way pedestal
CN215865008U (en) Radius measuring device
CN213422026U (en) Concrete plate thickness measuring tool
CN219368562U (en) Drawing dipperstick

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20210316

RJ01 Rejection of invention patent application after publication