CN114812326A - Measure measuring tape of small crack width - Google Patents
Measure measuring tape of small crack width Download PDFInfo
- Publication number
- CN114812326A CN114812326A CN202210277276.9A CN202210277276A CN114812326A CN 114812326 A CN114812326 A CN 114812326A CN 202210277276 A CN202210277276 A CN 202210277276A CN 114812326 A CN114812326 A CN 114812326A
- Authority
- CN
- China
- Prior art keywords
- measuring
- scale
- cone
- width
- steel
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 210000003128 head Anatomy 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 210000000887 face Anatomy 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000001788 irregular Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B3/00—Measuring instruments characterised by the use of mechanical techniques
- G01B3/02—Rulers with scales or marks for direct reading
- G01B3/04—Rulers with scales or marks for direct reading rigid
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
Abstract
The utility model provides a measure measuring tape of small crack width, is including measuring awl, scale bar, hollow cylinder bucket, its characterized in that: the measuring cone comprises a steel cylinder and a cone body, a sealing cover is arranged on the top end of the cylinder, the scale rod comprises a steel round cover and a scale rod, the round cover is a round flat plate and serves as a handle, the hollow cylindrical barrel is a steel barrel, the inner wall of the steel barrel is smooth, and a through hole is formed in the top of the steel barrel, wherein: the other end of the cylindrical rod is fixedly welded with the center of the upper surface of the sealing cover. The measuring scale for measuring the width of the micro crack has the advantages that the needle-shaped superfine advantage of the end part of the measuring conical needle is utilized, the measuring conical needle is inserted into the micro crack to be measured to perform accurate measurement, the depth of the crack to be measured is converted into the width by skillfully taking the angle, and the measuring precision reaches the precision of the decimeter (Dmm) by skillfully taking the angle and customizing the dial scale, so that the measurement is more accurate.
Description
Technical Field
The invention relates to a measuring tape, in particular to a measuring tape for measuring the width of a micro crack.
Background
The traditional measuring tool (such as a meter ruler, a vernier caliper and the like) cannot accurately measure the width of the micro crack; moreover, when the width of some micro cracks needs to be accurately measured, observation and estimation can be carried out only by naked eyes by using an incoherent measuring tool (such as irregular micro cracks of building components, measurement of the width of template splicing seams and the like).
In the construction process of the main structure of the building, after various concrete members are formed by hoisting, stripping, vibrating, maintaining and the like, certain damage to the surface of the concrete is inevitable; the damage is often irregular tiny cracks; for such a tiny crack we are measuring, it is difficult to measure its width with a conventional measuring tool.
The known measuring tool for the width of a micro crack therefore suffers from the inconveniences and problems described above.
Disclosure of Invention
The invention aims to provide a safe and reliable measuring scale for measuring the width of a micro crack.
In order to achieve the purpose, the technical solution of the invention is as follows:
the utility model provides a measure measuring tape of small crack width, is including measuring awl, scale bar, hollow cylinder bucket, its characterized in that:
the measuring cone comprises a steel cylinder and a cone, the top end of the cylinder is provided with a sealing cover, and the bottom end of the cylinder is matched with the cone, so that the pointed cone head of the cone faces downwards;
the scale rod comprises a steel round cover and a scale rod, the round cover is a round flat plate and is used as a handle, the scale rod is a cylindrical rod, one end of the cylindrical rod is fixedly welded with the center of the round cover, scale marks are respectively arranged on two corresponding surfaces of the circumference of the cylindrical rod, and the scale marks are 1mm and equal to the standard length of 1 cm;
the hollow cylindrical barrel is a steel barrel, the inner wall of the steel barrel is smooth, a through hole is formed in the top of the steel barrel, and a cylindrical rod is movably accommodated in the through hole; two stepped inner cavities are sequentially arranged at the lower part of the through hole, a plurality of groups of springs are uniformly distributed in the circumferential direction of the first stepped inner cavity, one end of each spring is connected with the top of the first step through a connecting piece, and the other end of each spring is connected with the sealing cover through a connecting piece, so that the measuring cone moves in a controlled range; the second stepped inner cavity is circumferentially arranged so that the measuring cone is blocked when the spring rebounds; arc-shaped holes are formed in two symmetrical sides of the lower portion of the steel barrel so that a gap can be observed by naked eyes in the measuring process, and the sharp cone head is inserted into the gap to measure;
wherein: the other end of the cylindrical rod is fixedly welded with the center of the upper surface of the sealing cover.
The measuring tape for measuring the width of the micro cracks can be further realized by adopting the following technical measures.
The measuring tape for measuring the width of the micro crack is characterized in that the cylinder is a hollow cylinder barrel.
The above measuring tape for measuring the width of a micro crack, wherein the scale mark is described as 0 to 10mm, the minimum unit scale is 1dmm, and the height of the scale mark is 10 mm.
In the measuring tape for measuring the width of the micro crack, the spring is arranged to stretch and contract the measuring cone under the non-measuring state, so that the scale of the cylindrical rod returns to zero.
In the measuring tape for measuring the width of the micro cracks, the material of the graduated rod is stainless steel.
The foregoing measuring tape for measuring the width of the minute crack, wherein the angle of the pointed conical head is set to 2 θ =5.725 °, θ =2.8625 °, tan θ ≈ 0.05= (W/2)/H = > W =0.1H, W is the diameter of the bottom end of the conical head, H is the height of the conical head, and H =10 cm.
After the technical scheme is adopted, the measuring tape for measuring the width of the micro crack has the following advantages:
1. the method is characterized in that the method utilizes the advantage of extremely fine needle shape of the end part of a measuring conical needle to be inserted into a micro crack to be measured for accurate measurement;
2. converting the depth of the crack to be measured into the width by skillfully taking the angle;
3. through skillfully taking the angle and customizing the dial, the measurement precision reaches the precision of the silk meter (Dmm), and the measurement is more accurate.
Drawings
Fig. 1 is a schematic view of a measuring tape according to an embodiment of the present invention, illustrating a return-to-zero state of the measuring tape, wherein F is a pressing direction of a handle of the measuring tape;
fig. 2 is a schematic view of a measuring tape in use according to an embodiment of the present invention.
In the figure: the measuring tool comprises a handle 1, a scale rod 2, a spring 3, a hollow cylindrical barrel 4, a measuring cone 5, a concrete member 6 and a crack 7.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
Example 1
Fig. 1 is a schematic view of a measuring tape according to an embodiment of the present invention, illustrating a zeroing state of the measuring tape, where F is a pressing direction of a handle of the measuring tape.
The invention relates to a method for manufacturing a measuring tape for measuring the width of a micro crack, which comprises the following steps:
(1) taking a stainless steel plate with the thickness of 2-3mm, and making a measuring cone (the height H =10 cm) according to the angle 2 theta =5.725 degrees shown by the measuring cone in FIG. 1; taking a stainless steel plate with the thickness of 2-3mm, manufacturing an upper barrel (the outer diameter width is w, the width is the same as the inner wall of a measuring cone sliding barrel, the barrel is utilized to enable the measuring cone to slide in the measuring cone sliding barrel), the height is self-determined, one end is sealed, and the other end is connected with the measuring cone (the welding is carried out, and the surface is polished to be smooth); a stainless steel column (the end part of which is provided with a measuring handle and is hollow and solid) is made into a cylindrical scale bar, and the cylindrical scale bar is connected with a barrel at the top of a measuring cone through a sliding barrel of the measuring cone. Taking a cylinder scale rod zero scale point at the top of the measuring cone sliding barrel, and manufacturing the cylinder scale rod with the height of 10mm and the minimum scale of 1Dmm (silk rice) according to the height of 1cm =1 mm.
(2) Taking one steel sliding barrel (the inner diameter is equal to the outer diameter of a measuring cone = w, the wall thickness is 3-5mm, the inner clear height = the height of the measuring cone (10 cm) + the height of an upper barrel), plugging one end (a hole with the same diameter and width as the cylindrical scale rod is reserved in the center to ensure that the cylindrical scale rod passes through the hole), reserving a concave area (used for installing a spring) at the bottom of the closed end, and reserving holes on two symmetrical surfaces of an opening area at the bottom to facilitate observation of the end part of the measuring cone and accurate positioning of a micro crack; the size is set according to actual needs).
(3) And (4) taking 2 springs to assemble the measuring cone, the measuring cone sliding barrel and the springs.
Fig. 2 is a schematic view of a measuring tape in an embodiment of the present invention, in which the width of the micro crack is 47Dmm =4.7 mm. The invention relates to a using method of a measuring tape for measuring the width of a micro crack, which comprises the following steps:
(1) and the tip of the measuring cone is inserted into the small crack by observing the hole at the bottom of the sliding barrel of the measuring cone.
(2) Slightly pushing the handle of the measuring scale at the top end of the cylindrical scale rod to enable the measuring cone to penetrate into the crack to reach the limit (only slightly pushing the crack, the limit is reached; and the repeated pushing is forbidden to prevent the measuring cone from damaging the edge of the micro crack and further enable the measured data to be inaccurate.)
(3) And reading the scale on the cylindrical scale bar to obtain the width of the micro crack.
The measuring scale for measuring the width of the micro cracks has substantial characteristics and obvious technical progress, and the progress of measuring the irregular damage surfaces, the carbonization depth and the like of the surfaces of the concrete columns and the beams is very smooth; the quality of the engineering entity is effectively controlled, and meanwhile, errors caused by pre-judgment measurement are reduced in the measurement process, so that the measurement precision is more accurate. Meanwhile, the measuring scale is simple and easy to manufacture, economical and practical, and unnecessary economic burden brought by purchasing of advanced electronic measuring instruments is reduced.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Accordingly, all equivalents are intended to fall within the scope of the invention, which is defined in the claims.
Claims (6)
1. The utility model provides a measure measuring tape of small crack width, is including measuring awl, scale bar, hollow cylinder bucket, its characterized in that:
the measuring cone comprises a steel cylinder and a cone, the top end of the cylinder is provided with a sealing cover, and the bottom end of the cylinder is matched with the cone, so that the pointed cone head of the cone faces downwards;
the scale rod comprises a steel round cover and a scale rod, the round cover is a round flat plate and serves as a handle, the scale rod is a cylindrical rod, one end of the cylindrical rod is fixedly welded with the center of the round cover, scale marks are respectively arranged on two corresponding surfaces of the circumference of the cylindrical rod, and the scale marks are 1mm and equal to the standard length of 1 cm;
the hollow cylindrical barrel is a steel barrel, the inner wall of the steel barrel is smooth, a through hole is formed in the top of the steel barrel, and a cylindrical rod is movably accommodated in the through hole; two stepped inner cavities are sequentially arranged at the lower part of the through hole, a plurality of groups of springs are uniformly distributed in the circumferential direction of the first stepped inner cavity, one end of each spring is connected with the top of the first step through a connecting piece, and the other end of each spring is connected with the sealing cover through a connecting piece, so that the measuring cone moves in a controlled range; the second stepped inner cavity is circumferentially arranged so that the measuring cone is blocked when the spring rebounds; arc-shaped holes are formed in two symmetrical sides of the lower portion of the steel barrel so that a gap can be observed by naked eyes in the measuring process, and the sharp cone head is inserted into the gap to measure;
wherein: the other end of the cylindrical rod is fixedly welded with the center of the upper surface of the sealing cover.
2. The measuring tape for measuring the width of the micro cracks as claimed in claim 1, wherein the cylinder is a hollow cylindrical barrel.
3. The measuring tape for measuring the width of minute cracks as claimed in claim 1, wherein the scale mark records 0-10mm, the minimum unit scale is 1dmm, and the scale mark height is 10 mm.
4. The measuring tape for measuring the width of the micro cracks as claimed in claim 1, wherein the spring is arranged to achieve that in a non-measuring state, the spring stretches and contracts the measuring cone to enable the scale of the cylindrical rod to return to zero.
5. The measuring tape for measuring the width of the micro cracks as claimed in claim 1, wherein the graduated rod is made of stainless steel.
6. The measuring tape for measuring the width of a minute crack as claimed in claim 1, wherein the angle of the pointed conical head is set to 2 θ =5.725 °, θ =2.8625 °, tan θ ≈ 0.05= (W/2)/H = > W =0.1H, W is the diameter of the bottom end of the conical head, H is the height of the conical head, and H =10 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210277276.9A CN114812326A (en) | 2022-03-21 | 2022-03-21 | Measure measuring tape of small crack width |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210277276.9A CN114812326A (en) | 2022-03-21 | 2022-03-21 | Measure measuring tape of small crack width |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114812326A true CN114812326A (en) | 2022-07-29 |
Family
ID=82530071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210277276.9A Pending CN114812326A (en) | 2022-03-21 | 2022-03-21 | Measure measuring tape of small crack width |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114812326A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871762A (en) * | 2010-06-30 | 2010-10-27 | 奇瑞汽车股份有限公司 | Clearance measurement tool |
| CN201897454U (en) * | 2010-11-29 | 2011-07-13 | 天津盛象塑料管业有限公司 | Special measuring tool for measuring gap width of forming die of plastic pipe extruder |
| CN109945766A (en) * | 2019-04-09 | 2019-06-28 | 田泽宇 | A kind of portable bridge fracture width measuring instrument |
| CN213041149U (en) * | 2020-10-22 | 2021-04-23 | 张烨 | Bridge crack measuring device for municipal bridge engineering |
| CN213748188U (en) * | 2021-01-08 | 2021-07-20 | 焦亚军 | Road and bridge crack detection device |
| CN214308536U (en) * | 2021-03-15 | 2021-09-28 | 西南交通大学青岛轨道交通研究院 | Track traffic switch tongue close contact detection tool |
-
2022
- 2022-03-21 CN CN202210277276.9A patent/CN114812326A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871762A (en) * | 2010-06-30 | 2010-10-27 | 奇瑞汽车股份有限公司 | Clearance measurement tool |
| CN201897454U (en) * | 2010-11-29 | 2011-07-13 | 天津盛象塑料管业有限公司 | Special measuring tool for measuring gap width of forming die of plastic pipe extruder |
| CN109945766A (en) * | 2019-04-09 | 2019-06-28 | 田泽宇 | A kind of portable bridge fracture width measuring instrument |
| CN213041149U (en) * | 2020-10-22 | 2021-04-23 | 张烨 | Bridge crack measuring device for municipal bridge engineering |
| CN213748188U (en) * | 2021-01-08 | 2021-07-20 | 焦亚军 | Road and bridge crack detection device |
| CN214308536U (en) * | 2021-03-15 | 2021-09-28 | 西南交通大学青岛轨道交通研究院 | Track traffic switch tongue close contact detection tool |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106152956B (en) | A kind of laser inside diameter measuring instrument | |
| CN207717524U (en) | A kind of concrete Intensity of Breaking Tester | |
| CN105571461A (en) | Accuracy measurement method for precision tapered hole | |
| CN201715984U (en) | Novel pitch-row distance admeasuring apparatus | |
| CN205482688U (en) | Multi -functional slide caliper makes up measuring tool | |
| CN103542791A (en) | Flange multi-parameter integrated measuring method and device | |
| CN205209415U (en) | Accurate taper hole NULL device | |
| CN114739256B (en) | Scribing and measuring method for cylindrical sample tensile experiment | |
| CN114812326A (en) | Measure measuring tape of small crack width | |
| CN208736281U (en) | A kind of flange form tyre crane modularization making special measuring tool | |
| CN114812327B (en) | Measuring scale for measuring deepest of irregular damaged surface of concrete member surface | |
| CN109443158A (en) | A kind of measuring device and its test method of deep-hole parts bottom hole wall thickness dimension | |
| CN108253915B (en) | Calibration method | |
| CN109323645A (en) | A kind of concrete surface roughness measuring device and its application method | |
| CN210603114U (en) | Measure measuring device of blind hole degree of depth | |
| CN209069158U (en) | A kind of fast sampling cone hole detection device meeting ergonomics | |
| CN202938764U (en) | Two-hole center distance measuring device | |
| CN204666056U (en) | Edge-shaped micrometric depth gauge | |
| CN109724497B (en) | Method for online detecting radius value of inner sphere | |
| CN106152905A (en) | Cantilevered dial gauge calibrator | |
| CN209911113U (en) | Reinforcing bar elongation tester | |
| CN213631854U (en) | Anti-abrasion high-precision angle measuring instrument for engineering measurement | |
| CN101344378A (en) | Internal hole reference positioning auxiliary measuring device | |
| CN218156139U (en) | Improved verticality observation scale | |
| CN220084464U (en) | Auxiliary tool for segmenting test piece for CA mortar separation degree test |
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: 20220729 |
|
| RJ01 | Rejection of invention patent application after publication |