CN114739263A - Taper hole measuring device and measuring method thereof - Google Patents
Taper hole measuring device and measuring method thereof Download PDFInfo
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- CN114739263A CN114739263A CN202210286356.0A CN202210286356A CN114739263A CN 114739263 A CN114739263 A CN 114739263A CN 202210286356 A CN202210286356 A CN 202210286356A CN 114739263 A CN114739263 A CN 114739263A
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- sleeve
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- taper
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005259 measurement Methods 0.000 description 8
- 238000000465 moulding Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Classifications
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- 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
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
-
- 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
- G01B5/08—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The application discloses a taper hole measuring device and a measuring method thereof, which indirectly measure parameters of taper holes with different apertures by using the extension and retraction of a hollow measuring block and a standard measuring block, avoid frequent replacement of measuring instruments with different models by workers in actual operation, and improve the working efficiency; meanwhile, the calculation formula is simplified, the parameters of the conical hole can be obtained by measuring the two height data, the technical requirement on an operator is low, and the method is easy to popularize.
Description
Technical Field
The application relates to the field of mechanical part detection, in particular to a taper hole measuring device and a measuring method thereof.
Background
In the design of mechanical parts, conical matching has wide application because of the advantages of higher coaxiality, good sealing performance, stable matching and the like. However, the conical hole structure is tapered, which is inconvenient to measure compared with the cylindrical hole, and as shown in fig. 1, the conical hole is a common conical hole, wherein the taper α and the large end diameter D1 are important design parameters and frequently measured values of the conical hole, and it is difficult to accurately measure the taper and the large end diameter D1. At present, indirect measurement is usually used, some specific structures are adopted, linear dimensions related to the measured taper are measured by means of conventional measuring instruments, and related parameters of the measured taper are calculated through a trigonometric function.
However, in actual operation, when an operator measures a plurality of conical holes with different hole diameters, the detection efficiency is low.
Disclosure of Invention
The application mainly aims to provide a taper hole measuring device and a taper hole measuring method, and aims to solve the technical problem of low detection efficiency when measuring taper holes with different hole diameters.
In order to achieve the above object, the present application provides a taper hole measuring apparatus, including: the device comprises a standard measuring block, a hollow measuring block and a reference block; the datum block comprises a support plate and a first sleeve, the first sleeve is perpendicular to the plate surface of the support plate, and the first sleeve penetrates through the support plate; the supporting plate is used for supporting a taper opening of the taper hole;
the hollow measuring block comprises a first circular plate and a second sleeve, the second sleeve is perpendicular to the plate surface of the first circular plate, and the second sleeve penetrates through the first circular plate; the second sleeve is sleeved inside the first sleeve, so that the second sleeve can slide along the axial direction of the first sleeve;
the standard measuring block comprises a second circular plate and a sliding rod vertically connected with the second circular plate, and the sliding rod is sleeved inside the second sleeve, so that the sliding rod can slide along the axial direction of the first sleeve; the first circular plate, the second circular plate, the first sleeve, the second sleeve and the slide bar are coaxial;
scales are arranged on the first sleeve, the second sleeve and the sliding rod;
the diameter of the first circular plate is larger than the diameter of the second circular plate.
Optionally, a first threaded through hole is formed in the side surface of the first sleeve, and the first threaded through hole is in threaded connection with a first fixing screw.
Optionally, a second threaded through hole is formed in the side surface of the second sleeve, and a second fixing screw is connected to the second threaded through hole in a threaded manner.
Optionally, the support plate comprises a telescopic block for adjusting the support plate length.
Optionally, a first reading frame is arranged on the first sleeve, and the first reading frame is matched with the scale of the second sleeve to form a first vernier caliper.
Optionally, a second reading frame is arranged on the second sleeve, and the second reading frame is matched with the scale of the sliding rod to form a second vernier caliper.
Optionally, the standard gauge block is integrally formed.
Optionally, the hollow gauge block is integrally formed.
Optionally, the datum block is integrally formed.
In addition, to achieve the above object, the present application further provides a taper hole measuring method, including:
measuring a first height value and a second height value of the conical hole to be measured by using the conical hole measuring device;
based on the first height value and the second height value, the taper and the large end diameter of the conical hole to be measured are obtained through the following relational expression:
wherein alpha is the taper, D1 is the diameter of the large end, D2 is the diameter of the hollow gauge block, D3 is the diameter of the standard gauge block, H1 is the first height, H2 is the second height.
The beneficial effect that this application can realize.
The taper hole measuring device and the measuring method thereof provided by the embodiment of the application comprise a standard measuring block, a hollow measuring block and a reference block; the datum block comprises a support plate and a first sleeve, the first sleeve is perpendicular to the plate surface of the support plate, and the first sleeve penetrates through the support plate; the supporting plate is used for supporting a taper opening of the taper hole; the hollow measuring block comprises a first circular plate and a second sleeve, the second sleeve is perpendicular to the plate surface of the first circular plate, and the second sleeve penetrates through the first circular plate; the second sleeve is sleeved inside the first sleeve, so that the second sleeve can slide along the axial direction of the first sleeve; the standard measuring block comprises a second circular plate and a sliding rod vertically connected with the second circular plate, and the sliding rod is sleeved inside the second sleeve, so that the sliding rod can slide along the axial direction of the first sleeve; the first circular plate, the second circular plate, the first sleeve, the second sleeve and the slide bar are coaxial; scales are arranged on the first sleeve, the second sleeve and the sliding rod; the diameter of the first circular plate is larger than the diameter of the second circular plate. The parameters of the conical holes with different apertures are indirectly measured by the expansion of the hollow measuring block and the standard measuring block, so that the frequent replacement of measuring instruments with different models by workers in actual operation is avoided, and the working efficiency is improved; meanwhile, the calculation formula is simplified, the parameters of the conical hole can be obtained by measuring the two height data, the technical requirement on an operator is low, and the method is easy to popularize.
Drawings
FIG. 1 is a schematic view of a tapered hole structure according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a taper hole measuring apparatus according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a reference block of the taper hole measuring apparatus of FIG. 2;
FIG. 4 is a schematic view of a hollow measuring block of the taper hole measuring apparatus shown in FIG. 2;
FIG. 5 is a schematic view of a standard measuring block of the taper hole measuring apparatus shown in FIG. 2;
fig. 6 is a schematic view of measurement parameters of a taper hole measurement apparatus according to an embodiment of the present disclosure;
fig. 7 is a schematic measurement diagram of a taper hole measuring apparatus according to an embodiment of the present disclosure;
reference numerals: 1. a first sleeve; 2. a support plate; 3. a second sleeve; 4. a first circular plate; 5. a slide bar; 6. a second circular plate; 7. a first set screw; 8. a second set screw; 9. a first reading frame; 10. A second reading frame.
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that all directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is 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 at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 2 to 5, an embodiment of the present application provides a taper hole measuring apparatus, including a standard measuring block, a hollow measuring block, and a reference block; the datum block comprises a support plate 2 and a first sleeve 1, wherein the first sleeve 1 is perpendicular to the plate surface of the support plate 2, and the first sleeve 1 penetrates through the support plate 2; the supporting plate 2 is used for supporting a taper opening of the taper hole; the hollow measuring block comprises a first circular plate 4 and a second sleeve 3, the second sleeve 3 is perpendicular to the plate surface of the first circular plate 4, and the second sleeve 3 penetrates through the first circular plate 4; the second sleeve 3 is sleeved inside the first sleeve 1, so that the second sleeve 3 can slide along the axial direction of the first sleeve 1; the standard measuring block comprises a second circular plate 6 and a sliding rod 5 vertically connected with the second circular plate 6, and the sliding rod 5 is sleeved inside the second sleeve 3, so that the sliding rod 5 can slide along the axial direction of the first sleeve 1; the first circular plate 4, the second circular plate 6, the first sleeve 1, the second sleeve 3 and the slide bar 5 are coaxial; scales are arranged on the first sleeve 1, the second sleeve 3 and the sliding rod 5; the diameter of the first circular plate 4 is larger than the diameter of the second circular plate 6.
In this embodiment, as shown in fig. 3, fig. 3 is a reference block, the reference block includes a supporting plate 2 and a first sleeve 1, the first sleeve 1 vertically penetrates through the plate surface of the supporting plate 2, the first sleeve 1 is hollow, and the supporting plate 2 also has a hole with a size matched with that of the first sleeve for penetrating through other structures; the backup pad is placed in the circular cone top that awaits measuring for support the measuring device that this application provided.
As shown in fig. 4, fig. 4 is a hollow measuring block, which includes a first circular plate 4 and a second sleeve 3, the second sleeve 3 vertically penetrates through the plate surface of the first circular plate 4, the second sleeve 3 is hollow, and the first circular plate 4 also has a hole with a size matched with that of the first circular plate for passing through other structures; the second sleeve 3 passes through the hole of the support plate 2 and is sleeved inside the first sleeve 1, and the second sleeve 3 can slide along the axial direction of the first sleeve 1.
As shown in fig. 5, fig. 5 is a standard measuring block, the standard measuring block comprises a second circular plate 6 and a sliding rod 5, and the sliding rod 5 vertically penetrates through the plate surface of the second circular plate 6; the slide rod 5 passes through the hole of the first circular plate 4 and is sleeved inside the second sleeve 3, and the slide rod 5 can slide along the axial direction of the first sleeve 1 and the second sleeve 3.
The reference block, the hollow measuring block and the standard measuring block in the figures 3-5 are vertically nested together, the supporting plate 2 is placed above the conical hole to be measured, and the positions of the first circular plate 4 and the second circular plate 6 are adjusted by sliding up and down to be contacted with the inner wall of the conical hole to be measured; the scales on the first sleeve 1, the second sleeve 3 and the slide bar 5 are read to obtain the measured values. In practical situations, the conical hole has a structure with a wide top and a narrow bottom, so the diameter of the first circular plate 4 needs to be larger than the diameter of the second circular plate 6.
As an optional implementation manner, a first threaded through hole is formed in the side surface of the first sleeve 1, and a first fixing screw 7 is connected to the first threaded through hole in a threaded manner.
In this embodiment, a first threaded through hole is formed in the side surface of the first sleeve 1, the first fixing screw 7 is connected, the first fixing screw 7 is screwed after the position of the first circular plate 4 is determined in the measurement process, and the reference block and the hollow measurement block are fixed, so that the influence of slight sliding in the measurement process on the reading accuracy is prevented.
As an alternative embodiment, a second threaded through hole is formed in the side surface of the second sleeve 3, and a second fixing screw 8 is connected to the second threaded through hole in a threaded manner.
In this embodiment, a second threaded through hole is formed in the side surface of the second sleeve 3, the second fixing screw 8 is connected, the second fixing screw 8 is screwed after the position of the second circular plate 6 is determined in the measuring process, and the hollow measuring block and the standard measuring block are fixed, so that the influence of slight sliding on the reading accuracy in the measuring process is prevented.
As an alternative embodiment, the support plate 2 comprises a telescopic block for adjusting the length of the support plate 2.
In this embodiment, the aperture of taper hole probably is longer than measuring device's backup pad in the scene is measured to the reality, unable adaptation, and this application sets up flexible block structure in backup pad 2, prolongs backup pad 2 according to taper hole aperture, satisfies this measurement scene.
As an alternative embodiment, a first reading frame 9 is arranged on the first sleeve 1, and the first reading frame 9 is matched with the scale of the second sleeve 3 to form a first vernier caliper.
In this embodiment, the scale of the second sleeve 3 displayed in the first reading frame 9 and the scale on the first sleeve 1 are read, that is, the reading of the first vernier caliper is the distance between the lower edge of the first circular plate 4 and the lower edge of the supporting plate 2.
As an alternative embodiment, a second reading frame 10 is arranged on the second sleeve 3, and the second reading frame 10 is matched with the scale of the slide bar 5 to form a second vernier caliper.
In this embodiment, the scale of the sliding rod 5 displayed in the second reading frame 10 and the scale on the second sleeve 3 are read, that is, the reading of the second vernier caliper is the distance between the lower edge of the second circular plate 6 and the lower edge of the first circular plate 4.
As an alternative embodiment, the standard measuring block is integrally formed.
In this embodiment, the standard measuring block is composed of the sliding rod 5 and the second circular plate 6, and can be connected by means of integral molding, welding, adhesion and the like, wherein the strength and stability of the integral molding connection mode are highest.
As an alternative embodiment, the hollow gauge block is integrally formed.
In the embodiment, the hollow measuring block is composed of the second sleeve 3 and the first circular plate 4, and can be connected through integral forming, welding, adhesion and the like, wherein the strength and the stability of the integral forming connection mode are highest.
As an alternative embodiment, the reference block is integrally formed.
In this embodiment, the reference block is composed of the first sleeve 1 and the support plate 2, and can be connected by integral molding, welding, adhesion, etc., wherein the strength and stability of the integral molding connection are the highest.
Referring to fig. 6 to 7, an embodiment of the present application provides a taper hole measuring method based on the same inventive concept as the above-described embodiment, including:
measuring a first height value and a second height value of the conical hole to be measured by using the conical hole measuring device in the embodiment;
based on the first height value and the second height value, the taper and the large end diameter of the conical hole to be measured are obtained through the following relational expression:
wherein alpha is the taper, D1 is the diameter of the large end, D2 is the diameter of the hollow gauge block, D3 is the diameter of the standard gauge block, H1 is the first height, H2 is the second height.
In this embodiment, the taper of the conical hole is the ratio of the bottom surface diameter to the height of the cone, but it is difficult to accurately measure the height of the cone and the bottom surface diameter in real operation, a simpler calculation formula is derived according to the geometric characteristics of the conical hole, and the taper and the bottom surface diameter of the conical hole, that is, the diameter of the large end, can be calculated by measuring the first height H1 and the second height H2.
The first height H1 is measured by the support plate of the reference block and the first circular plate of the hollow measuring block, and the first vernier caliper reading is formed by the first reading frame and the second sleeve, as shown in fig. 7, and the first height H1 is 10.00 mm.
The second height H2 is measured by the first circular plate of the hollow measuring block and the second circular plate of the standard measuring block, and the second vernier caliper reading is formed by the second reading frame and the slide bar, as shown in fig. 7, and the second height H2 is 20.00 mm.
The diameter D2 of the hollow measuring block is 80mm, the diameter D3 of the standard measuring block is 40mm, and the diameter D2 of the hollow measuring block is calculated according to the formula
Calculating to obtain the taper alpha of 90 degrees; by the formula
The large end diameter D1 was calculated to be 100 mm.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.
Claims (10)
1. The taper hole measuring device is characterized by comprising a standard measuring block, a hollow measuring block and a reference block; the datum block comprises a support plate and a first sleeve, the first sleeve is perpendicular to the plate surface of the support plate, and the first sleeve penetrates through the support plate; the supporting plate is used for supporting a taper opening of the taper hole;
the hollow measuring block comprises a first circular plate and a second sleeve, the second sleeve is perpendicular to the plate surface of the first circular plate, and the second sleeve penetrates through the first circular plate; the second sleeve is sleeved inside the first sleeve, so that the second sleeve can slide along the axial direction of the first sleeve;
the standard measuring block comprises a second circular plate and a sliding rod vertically connected with the second circular plate, and the sliding rod is sleeved inside the second sleeve, so that the sliding rod can slide along the axial direction of the first sleeve; the first circular plate, the second circular plate, the first sleeve, the second sleeve and the slide bar are coaxial;
scales are arranged on the first sleeve, the second sleeve and the sliding rod;
the diameter of the first circular plate is larger than that of the second circular plate.
2. The taper hole measuring device according to claim 1, wherein a first threaded through hole is formed in a side surface of the first sleeve, and the first threaded through hole is in threaded connection with a first fixing screw.
3. The taper hole measuring device according to claim 1, wherein a second threaded through hole is formed in a side surface of the second sleeve, and the second threaded through hole is in threaded connection with a second fixing screw.
4. A taper hole measuring device according to claim 1, wherein said support plate includes a telescopic block for adjusting the length of said support plate.
5. A taper hole measuring device according to claim 1, wherein the first sleeve is provided with a first reading frame, and the first reading frame is matched with the scale of the second sleeve to form a first vernier caliper.
6. The taper hole measuring device according to claim 1, wherein a second reading frame is disposed on the second sleeve, and the second reading frame is engaged with the scale of the slide rod to form a second vernier caliper.
7. The taper hole measuring apparatus according to claim 1, wherein the reference gauge block is integrally formed.
8. The taper hole measuring apparatus of claim 1, wherein the hollow gauge block is integrally formed.
9. A taper hole measuring apparatus according to claim 1, wherein said reference block is integrally formed.
10. A taper hole measuring method, comprising:
measuring a first height value and a second height value of a conical hole to be measured by using the conical hole measuring device as claimed in any one of claims 1 to 9;
based on the first height value and the second height value, the taper and the large end diameter of the conical hole to be measured are obtained through the following relational expression:
wherein alpha is the taper, D1 is the diameter of the large end, D2 is the diameter of the hollow gauge block, D3 is the diameter of the standard gauge block, H1 is the first height, H2 is the second height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210286356.0A CN114739263A (en) | 2022-03-23 | 2022-03-23 | Taper hole measuring device and measuring method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210286356.0A CN114739263A (en) | 2022-03-23 | 2022-03-23 | Taper hole measuring device and measuring method thereof |
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| Publication Number | Publication Date |
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| CN114739263A true CN114739263A (en) | 2022-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210286356.0A Pending CN114739263A (en) | 2022-03-23 | 2022-03-23 | Taper hole measuring device and measuring method thereof |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2732979A1 (en) * | 1976-07-28 | 1978-02-02 | Finike Italiana Marposs | DEVICE FOR TESTING THE TOP ANGLE OF THE CONICAL SURFACE OF A WORKPIECE |
| CN201225875Y (en) * | 2008-07-24 | 2009-04-22 | 国营武昌造船厂 | Instrument for measuring small end conicity |
| CN202994045U (en) * | 2012-12-11 | 2013-06-12 | 南方天合底盘系统有限公司 | Diameter measuring tool of hole chamfer |
| CN203037196U (en) * | 2012-12-05 | 2013-07-03 | 柳州欧维姆机械股份有限公司 | Inner cone inclination steel ball measuring gauge |
| CN212692762U (en) * | 2020-07-27 | 2021-03-12 | 烟台瑱硕精密机械有限公司 | Numerical control radial drilling machine hole depth measuring device |
| CN213984862U (en) * | 2020-12-28 | 2021-08-17 | 中国建筑第二工程局有限公司 | Floor thickness measuring tool |
| CN214040108U (en) * | 2020-12-14 | 2021-08-24 | 余殿济 | Water conservancy parameter monitoring device |
| CN114061415A (en) * | 2021-12-08 | 2022-02-18 | 中国铁建重工集团股份有限公司 | Taper hole measuring device and measuring method |
| CN217786044U (en) * | 2022-05-25 | 2022-11-11 | 四川省亚通工程咨询有限公司 | Bridge bored pile aperture detection device |
-
2022
- 2022-03-23 CN CN202210286356.0A patent/CN114739263A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2732979A1 (en) * | 1976-07-28 | 1978-02-02 | Finike Italiana Marposs | DEVICE FOR TESTING THE TOP ANGLE OF THE CONICAL SURFACE OF A WORKPIECE |
| CN201225875Y (en) * | 2008-07-24 | 2009-04-22 | 国营武昌造船厂 | Instrument for measuring small end conicity |
| CN203037196U (en) * | 2012-12-05 | 2013-07-03 | 柳州欧维姆机械股份有限公司 | Inner cone inclination steel ball measuring gauge |
| CN202994045U (en) * | 2012-12-11 | 2013-06-12 | 南方天合底盘系统有限公司 | Diameter measuring tool of hole chamfer |
| CN212692762U (en) * | 2020-07-27 | 2021-03-12 | 烟台瑱硕精密机械有限公司 | Numerical control radial drilling machine hole depth measuring device |
| CN214040108U (en) * | 2020-12-14 | 2021-08-24 | 余殿济 | Water conservancy parameter monitoring device |
| CN213984862U (en) * | 2020-12-28 | 2021-08-17 | 中国建筑第二工程局有限公司 | Floor thickness measuring tool |
| CN114061415A (en) * | 2021-12-08 | 2022-02-18 | 中国铁建重工集团股份有限公司 | Taper hole measuring device and measuring method |
| CN217786044U (en) * | 2022-05-25 | 2022-11-11 | 四川省亚通工程咨询有限公司 | Bridge bored pile aperture detection device |
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