CN114941978B - Be used for power plant's cement prefabricated construction precision measurement device - Google Patents
Be used for power plant's cement prefabricated construction precision measurement device Download PDFInfo
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- CN114941978B CN114941978B CN202210855746.5A CN202210855746A CN114941978B CN 114941978 B CN114941978 B CN 114941978B CN 202210855746 A CN202210855746 A CN 202210855746A CN 114941978 B CN114941978 B CN 114941978B
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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
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
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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
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
-
- 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
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
- G01B5/0004—Supports
-
- 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
- G01B5/28—Measuring arrangements characterised by the use of mechanical techniques for measuring roughness or irregularity of surfaces
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a precision measuring device for a cement prefabricated structure of a power plant, which belongs to the field of precision measurement of the cement prefabricated structure and comprises a base and rollers, wherein the rollers are movably connected to the bottom of the base through an adjusting structure, a width measuring structure is arranged at the central position of the inner side of the base and comprises a sliding groove, a triangular seat, a scale rod, a sliding sleeve, a guide rod, a sleeve, a connecting column, a reset spring and a rotating rod, the sliding groove is formed in the central position of the upper surface of the base, the triangular seat is fixedly arranged at one end of the sliding groove in the upper part of the base, the scale rod is arranged on one side of the triangular seat, and the sliding sleeve is connected to the outer part of the scale rod in a sliding manner. The precision measuring device for the cement prefabricated structure of the power plant, disclosed by the invention, has the advantages of effectively improving the use convenience, being simpler and quicker to operate, having double measuring functions of width and flatness, having an adjusting function and being wide in application range.
Description
Technical Field
The invention relates to the field of precision measurement of a cement prefabricated structure, in particular to a precision measurement device for a cement prefabricated structure of a power plant.
Background
During building construction, a building structure usually has two preparation modes of in-situ casting and prefabrication in advance, the prefabricated cement structure can be used for lap joint of a building construction site, and is not limited by environment compared with the in-situ casting mode, the common prefabricated cement structure comprises a prefabricated beam, a prefabricated column and the like, the precision of the prefabricated beam and the prefabricated column needs to be measured after prefabrication, the purpose is to ensure the quality of the prefabricated member and further ensure the quality of the building, and in the process of measuring the precision, the length, the width, the aperture, the flatness and the like are usually included, and different measurement types need to be operated by different measuring devices;
however, when the existing cement prefabricated structure precision measuring device is used for measuring, tools such as a leveling ruler, a tape measure and the like are manually operated, so that on one hand, the operation is complicated, the use is inconvenient, on the other hand, the manual operation precision is poor, and the existing measurement error is large; secondly, the functionality is single, can only measure the prefabricated structure single value of cement simultaneously, and the functionality is poor.
Disclosure of Invention
The invention mainly aims to provide a device for measuring the precision of a cement prefabricated structure of a power plant, which can effectively solve the problems in the background art that: complex operation, poor precision and poor functionality.
In order to realize the purpose, the invention adopts the technical scheme that:
a precision measuring device for a cement prefabricated structure of a power plant comprises a base and rollers, wherein the rollers are movably connected to the bottom of the base through adjusting structures, and a width measuring structure is arranged at the center of the inner side of the base;
the width measurement structure is including spout, triangle seat, scale bar, sliding sleeve, guide arm, sleeve, spliced pole, reset spring and commentaries on classics rod, the spout is seted up and is put at the upper surface central point of base, triangle seat fixed mounting is located the one end of spout on the upper portion of base, one side at the triangle seat is installed to the scale bar, sliding sleeve sliding connection is in the outside of scale bar, guide arm fixed mounting is in the inside of spout, the sleeve cover is established in the outside of guide arm, spliced pole fixed connection is between sliding sleeve and sleeve, reset spring overlaps and establishes in the outside of guide arm and is located telescopic one side position, change the rod and rotate and connect in telescopic outside perpendicular bottom position.
As a further scheme of the invention, the sliding sleeve, the connecting column, the return spring and the rotating roller form elastic measuring assemblies, and the two elastic measuring assemblies are symmetrically arranged.
As a further scheme of the invention, the adjusting structure comprises a transverse plate, a guide sleeve, a guide pillar and a screw rod, the transverse plate is connected between the two rollers, the guide sleeve is fixedly arranged at the corner position of the upper part of the base, the guide pillar penetrates through the guide sleeve and the base and is fixedly connected with the transverse plate, and the screw rod penetrates through the base and is rotatably connected with the transverse plate.
As a further scheme of the invention, a screw seat is arranged at the center position of the upper part of the base close to one side, and the screw rod is in threaded connection with the contact surface of the screw seat.
As a further scheme of the invention, a flatness measuring structure is arranged at the position, close to the center of the front part, of the upper part of the base, and comprises a dial indicator, an upright post, a spring post, a rotary drum and a through hole, wherein the upright post is fixedly arranged at the position, close to the middle of the front part, of the upper part of the base, the spring post is movably connected to the bottom end of the upright post, the rotary drum is rotatably connected to the outer part of the spring post, and the through hole is formed in the position, close to the center of the front part, of the upper surface of the base.
As a further scheme of the invention, the spring column is in a shape of a letter' 21274.
As a further scheme of the invention, the dial indicator is connected with the upright post through an adjusting structure, the adjusting structure comprises a sleeve ring, a cross beam, a fixed block and a screw rod, the sleeve ring is fixedly arranged at the center position of the outer part of the dial indicator in the horizontal direction, the cross beam is arranged at the top end of the upright post, the fixed block is fixedly arranged at the center position of the outer part of the dial indicator in the vertical direction, and the screw rod penetrates through the cross beam and is rotatably connected with the fixed block.
As a further scheme of the invention, the screw rod is in threaded connection with the contact surface of the cross beam, the probe of the dial indicator penetrates through the through hole and is tightly pressed outside the rotary drum, and the lantern ring is sleeved outside the upright post.
As a further scheme of the invention, a handle is fixedly arranged at the rear part of the base, and the handle is arranged in a sixty-degree inclined manner in the horizontal direction.
The invention has the following beneficial effects:
the base is matched with the roller, a movable structure is adopted for measurement, the base is moved outside the cement prefabricated member through the roller, and the cement prefabricated member is measured, so that the convenience in use is effectively improved, and the operation is simpler and quicker compared with the traditional manual operation tape measure and ruler measurement modes;
by arranging the adjusting structure, the screw rod is rotated to push the transverse plate to move, so that the height of the roller can be adjusted, the distance between the base and the roller is adjusted, the measuring device can be suitable for cement prefabricated structures with different heights, and the application range is wider;
the width measuring structure is matched with the base and the roller, the base is pushed or pulled by the handle to move through the roller, the transfer roller is influenced by the reset spring in the moving process and always attached to the surface of the cement prefabricated member to move while rotating, and the width values of different positions of the cement prefabricated member can be obtained by observing the scales of the sliding sleeve outside the graduated rod, so that the measuring efficiency is effectively improved, the width of all the positions of the cement prefabricated member can be measured, the measuring precision is higher, the effect is better, and the operation is more convenient;
by arranging the flatness measuring structure, the base drives the rotary drum to move on the top surface of the prefabricated part while moving, and when an uneven structure is met, the spring column moves inside the upright column, so that the numerical value of the dial indicator can change due to the uneven surface of the cement prefabricated part, the surface flatness of the cement prefabricated part is measured, the purpose of simultaneously measuring the flatness and the width is realized by matching with the width measuring structure, and the functionality of the measuring device is effectively improved; the probe of the dial indicator is rotationally contacted by the rotary drum, so that the probe of the dial indicator is prevented from being directly contacted with the cement prefabricated member, and the protection of the probe of the dial indicator is improved;
through setting up adjustment structure cooperation roughness measurement structure, rotate the screw rod, the screw rod through with the crossbeam between the screw thread promote the fixed block vertical direction remove, can promote the percentage table through two lantern rings remove between two stands, adjust the height of percentage table for the roughness measurement structure can be applicable to the cement prefab of various not co-altitude, and application scope is more extensive.
Drawings
FIG. 1 is a schematic overall structure diagram of a precision measuring device for a cement prefabricated structure of a power plant, which is disclosed by the invention;
FIG. 2 is an enlarged partial structure view in FIG. 1 of the precision measuring device for the cement prefabricated structure of the power plant according to the present invention;
FIG. 3 is a bottom view of a precision measuring device for a cement prefabricated structure of a power plant according to the present invention;
FIG. 4 is a front view of a precision measuring device for a cement prefabricated structure of a power plant according to the invention;
FIG. 5 is an internal structure diagram of a column of the precision measuring device for a cement prefabricated structure of a power plant;
FIG. 6 is a side view of an apparatus for measuring accuracy of a cement precast structure of a power plant according to the present invention;
fig. 7 is an illustration of a measurement cement precast beam for a precision measurement device of a power plant cement precast structure according to the present invention.
In the figure: 1. a base; 2. a handle; 3. a roller; 4. an adjustment structure; 5. a transverse plate; 6. a guide sleeve; 7. a guide post; 8. a screw rod; 9. a width measurement structure; 10. a chute; 11. a triangular base; 12. a graduated rod; 13. a sliding sleeve; 14. a guide bar; 15. a sleeve; 16. connecting columns; 17. a return spring; 18. rotating the stick; 19. a flatness measurement structure; 20. a dial indicator; 21. a column; 22. a spring post; 23. a rotating drum; 24. a through hole; 25. adjusting the structure; 26. a collar; 27. a cross beam; 28. a fixed block; 29. a screw; 30. the spring is compressed.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in figures 1-7, the precision measuring device for the cement prefabricated structure of the power plant comprises a base 1 and rollers 3, wherein the rollers 3 are movably connected to the bottom of the base 1 through adjusting structures 4, and a width measuring structure 9 is arranged at the center of the inner side of the base 1.
In this embodiment, width measurement structure 9 is including spout 10, triangular seat 11, scale bar 12, sliding sleeve 13, guide arm 14, sleeve 15, spliced pole 16, reset spring 17 and commentaries on classics rod 18, spout 10 sets up the upper surface central point at base 1 and puts, the one end that the upper portion of triangular seat 11 fixed mounting at base 1 is located spout 10, scale bar 12 is installed in one side of triangular seat 11, sliding sleeve 13 sliding connection is in the outside of scale bar 12, 14 fixed mounting of guide arm are in the inside of spout 10, sleeve 15 covers the outside at guide arm 14, 16 fixed connection of spliced pole is between sliding sleeve 13 and sleeve 15, reset spring 17 covers the outside of guide arm 14 and is located one side position of sleeve 15, change rod 18 and rotate the perpendicular bottom position in the outside of connecting at sleeve 15.
The two rotary rods 18 slide and rotate outside the cement prefabricated member, the sliding sleeve 13 and the sleeve 15 slide outside the graduated rod 12 and the guide rod 14 respectively, in the process, the width of the cement prefabricated member is measured by the position, located outside the graduated rod 12, of the sliding sleeve 13, and the whole measuring device is moved through the roller 3, so that the measuring efficiency is effectively improved.
In this embodiment, the sliding sleeve 13, the sleeve 15, the connecting column 16, the return spring 17 and the rotating rod 18 form two elastic measurement assemblies, and the two elastic measurement assemblies are symmetrically arranged.
The reset spring 17 pushes the sliding sleeve 13 in real time, so that the rotating rod 18 is attached to the outer portion of the cement prefabricated part in real time, and smooth measurement is guaranteed.
In this embodiment, the adjusting structure 4 includes a transverse plate 5, a guide sleeve 6, a guide pillar 7 and a lead screw 8, the transverse plate 5 is connected between the two rollers 3, the guide sleeve 6 is fixedly mounted at the upper corner of the base 1, the guide pillar 7 penetrates through the guide sleeve 6 and the base 1 to be fixedly connected with the transverse plate 5, and the lead screw 8 penetrates through the base 1 to be rotatably connected with the transverse plate 5.
The height of the roller 3 can be adjusted by rotating the screw rod 8, so that the measuring device can be suitable for cement prefabricated structures with different heights, and the application range is wider.
In this embodiment, the screw seat is installed at the upper portion of the base 1 near the central position of one side, and the screw rod 8 is in threaded connection with the contact surface of the screw seat.
The screw rod 8 is in threaded connection with the screw seat, so that when the screw rod 8 rotates, the screw rod 8 can be driven to move in the vertical direction, the transverse plate 5 is pushed to move, and the purpose of adjusting the height of the roller 3 is achieved.
In this embodiment, a flatness measuring structure 19 is disposed at a position, close to the front center, of the upper portion of the base 1, the flatness measuring structure 19 includes a dial indicator 20, an upright column 21, a spring column 22, a rotary drum 23 and a through hole 24, the upright column 21 is fixedly mounted at a position, close to the front center, of the upper portion of the base 1, the spring column 22 is movably connected to the bottom end of the upright column 21, the rotary drum 23 is rotatably connected to the outer portion of the spring column 22, and the through hole 24 is formed in the upper surface of the base 1, close to the front center.
When base 1 passes through gyro wheel 3 and removes, drives rotary drum 23 and rotates on cement prefab surface, and the state that unevenness appears in the surface is, and rotary drum 23 promotes spring post 22 and shifts up perpendicularly, because of the probe of percentage table 20 and the contact of rotary drum 23, consequently 20 numerical values of percentage table can produce the change because of the cement prefab surface unevenness to record the surface smoothness of cement prefab, increased measuring device's functionality.
In this embodiment, the spring column 22 is in a shape of a letter \21274, the inside of the column 21 is in a central control type structure, and one end of the spring column 22 is located inside the spring column 22 and is connected with a pressing spring 30.
When the spring column 22 moves in the vertical direction, the elastic force of the hold-down spring 30 expands to enable the rotary drum 23 to contact the surface of the cement prefabricated member in real time, and smooth flatness measurement is guaranteed.
In this embodiment, the dial indicator 20 is connected with the upright post 21 through the adjusting structure 25, the adjusting structure 25 includes a collar 26, a beam 27, a fixing block 28 and a screw 29, the collar 26 is fixedly mounted at the center of the outer horizontal direction of the dial indicator 20, the beam 27 is mounted at the top end of the upright post 21, the fixing block 28 is fixedly mounted at the center of the outer vertical direction of the dial indicator 20, and the screw 29 penetrates through the beam 27 and is rotatably connected with the fixing block 28.
Through rotating screw 29, screw 29 can promote the vertical direction removal of fixed block 28 for dial indicator 20 passes through lantern ring 26 and moves between two stands 21 vertical direction, makes dial indicator 20 possess the vertical adjustment function, can be applicable to the cement prefabricated component of different heights.
In this embodiment, the screw 29 is in threaded connection with the contact surface of the cross beam 27, the probe through hole 24 of the dial indicator 20 is tightly pressed outside the drum 23, and the collar 26 is sleeved outside the column 21.
The screw 29 can move vertically when rotating due to the threaded connection surface between the screw 29 and the cross beam 27, and the adjusting function of the dial indicator 20 is realized.
In this embodiment, the handle 2 is fixedly installed at the rear portion of the base 1, and the handle 2 is arranged in a sixty-degree inclined manner in the horizontal direction.
When in use, the base 1 can be pulled or pushed to move through the handle 2, and the whole measuring device is convenient to operate and simple to use.
The invention is a precision measuring device for a cement prefabricated structure of a power plant, when the precision measuring device is used, a base 1 is moved to the outer side of a cement prefabricated part through a roller 3, a screw rod 8 is rotated, the screw rod 8 moves in the direction vertical to a thread between screw bases, a transverse plate 5 is pushed to move, and the height of the roller 3 is adjusted by the transverse plate 5 under the guiding action of a guide post 7, so that the base 1 can cross the cement prefabricated part and move on the outer side of the cement prefabricated part;
then the rotating rod 18 slides outside the graduated rod 12 and the guide rod 14 through the sliding sleeve 13 and the sleeve 15 respectively, so that the rotating rod 18 is positioned at two sides of the cement prefabricated member, the return spring 17 expands elastically, and the rotating rod 18 is pushed to be attached to the surface of the cement prefabricated member;
rotating the screw 29, pushing the fixed block 28 to move in the vertical direction by the screw 29 through threads between the screw 29 and the cross beam 27, thereby pushing the dial indicator 20 to move between the two upright posts 21 through the two lantern rings 26, and simultaneously pushing the rotary drum 23 to move by the probe of the dial indicator 20, so that the rotary drum 23 is attached to the upper surface of the cement prefabricated member;
the base 1 is pushed or pulled by the handle 2 to move through the roller 3, the transfer roller 18 is influenced by the return spring 17 in the moving process, always adheres to the surface of the cement prefabricated member and moves while rotating, and the width values of different positions of the cement prefabricated member can be obtained by observing the scales of the sliding sleeve 13 outside the graduated rod 12;
base 1 drives rotary drum 23 when removing and removes at the prefab top surface, when meetting uneven structure, and spring post 22 removes in the inside of stand 21 for rotary drum 23 highly produces the change, because of dial indicator 20's probe and rotary drum 23 contact, therefore 20 numerical values of dial indicator can produce the change because of the cement prefab surface unevenness, thereby record the surface smoothness of cement prefab.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (1)
1. The utility model provides a be used for prefabricated structure precision measurement device of power plant's cement which characterized in that: including base (1) and gyro wheel (3), gyro wheel (3) are through adjusting structure (4) swing joint in the bottom of base (1), the central point of base (1) puts and is equipped with width measurement structure (9), width measurement structure (9) are including spout (10), three corner seats (11), scale bar (12), sliding sleeve (13), guide arm (14), sleeve (15), spliced pole (16), reset spring (17) and commentaries on classics rod (18), the central point of base (1) is put and is run through the logical groove of base (1) upper and lower surface is seted up in spout (10), three corner seats (11) fixed mounting is located the both ends of spout (10) at the upper surface of base (1), scale bar (12) are installed on two three corner seats (11) and are located between two three corner seats, sliding sleeve (13) sliding connection is on scale bar (12), guide arm (14) fixed mounting is in the inside of spout (10), sleeve (15) cover is established on guide arm (14), fixed connection is in sliding sleeve (13) and sleeve (15) and the perpendicular commentaries on classics rod (15) the sleeve (15) the end portion of commentaries on classics rod (15), the sliding sleeve (13), the sleeve (15), the connecting column (16), the reset spring (17) and the rotary rod (18) form elastic measuring assemblies, the elastic measuring assemblies are symmetrically arranged in two groups, the adjusting structure (4) comprises a transverse plate (5), a guide sleeve (6), a guide pillar (7) and a screw rod (8), four rollers are arranged at four corners of the bottom of the base (1), the transverse plate (5) is connected to the two rollers (3) at one end of the sliding chute (10) in the length direction, the two transverse plates (5) are symmetrically arranged, the guide sleeve (6) is fixedly arranged at four corner positions on the upper surface of the base (1), the guide pillar (7) penetrates through the guide sleeve (6) and the base (1) to be fixedly connected with the transverse plate (5), lead screw (8) run through base (1) and are rotated with diaphragm (5) and be connected, the screw base is installed to one side position placed in the middle that the upper surface of base (1) corresponds diaphragm (5), lead screw (8) and screw base contact surface threaded connection, the upper surface of base (1) is close to anterior central point and puts and be equipped with roughness measurement structure (19), roughness measurement structure (19) are including percentage table (20), stand (21), spring post (22), rotary drum (23) and through-hole (24), two stand (21) fixed mounting is close to anterior intermediate position at the upper surface of base (1) The spring column (22) is shaped like a Chinese character '21274', an opening is upward, two vertical columns of the spring column (22) are movably connected to the bottom ends of the two vertical columns (21) respectively, the rotary drum (23) is rotatably sleeved on a transverse column of the spring column (22), the through hole (24) is formed in the position, close to the front center, of the base (1), the vertical column (21) is of a hollow structure, one end of the spring column (22) is located inside the vertical column (21) and is connected with a compression spring (30), the dial indicator (20) and the vertical column (21) are connected through an adjusting structure (25), the adjusting structure (25) comprises a sleeve ring (26), a cross beam (27), a fixed block (28) and a screw rod (29), the two sleeve rings (26) are fixedly installed at the horizontal center positions on two sides of the dial indicator (20), the cross beam (27) is installed at the top ends of the two vertical columns (21), the screw rod (29) penetrates through the fixed block (28) and is connected with the screw rod (29) in a threaded manner, the screw rod (29) is connected with the through the sleeve ring (26) and is connected with the screw rod (23), the rear portion fixed mounting of base (1) has handle (2), handle (2) are the setting of sixty degrees slopes of horizontal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210855746.5A CN114941978B (en) | 2022-07-21 | 2022-07-21 | Be used for power plant's cement prefabricated construction precision measurement device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210855746.5A CN114941978B (en) | 2022-07-21 | 2022-07-21 | Be used for power plant's cement prefabricated construction precision measurement device |
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| CN114941978A CN114941978A (en) | 2022-08-26 |
| CN114941978B true CN114941978B (en) | 2022-10-25 |
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| CN117308734B (en) * | 2023-11-30 | 2024-02-06 | 成都欧派智能家居有限公司 | Rapid detection device for dimensional tolerance of plate |
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| CN216869435U (en) * | 2022-03-09 | 2022-07-01 | 重庆强捷钢结构有限公司 | Steel construction levelness detection device |
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| US5392527A (en) * | 1993-07-12 | 1995-02-28 | Wheelabrator Engineered Systems, Inc. | Annulus measuring device |
| CN206573059U (en) * | 2017-03-16 | 2017-10-20 | 刘涛 | A kind of large hydraulic engineering crack expansion joint change detecting device |
| CN207317766U (en) * | 2017-09-13 | 2018-05-04 | 张斌 | A kind of width detecting for Bridge Crack |
| CN207439339U (en) * | 2017-12-06 | 2018-06-01 | 安徽同利汽车零部件有限公司 | A kind of flatness detecting device of stamping parts of automobile |
| CN208983978U (en) * | 2018-10-09 | 2019-06-14 | 青岛市交通规划设计院有限公司 | A kind of pavement crack tilted object instrument |
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| CN212133531U (en) * | 2020-10-24 | 2020-12-11 | 长沙锐旭工程技术服务有限公司 | Wall gap width measuring device for detecting house building main body |
| CN213335887U (en) * | 2020-11-25 | 2021-06-01 | 安庆市磐石岩土有限公司 | Pavement crack width tester |
| CN213422021U (en) * | 2020-12-14 | 2021-06-11 | 山东省物化探勘查院 | Hydraulic ring geological crack measuring device |
| CN214095862U (en) * | 2021-01-25 | 2021-08-31 | 安徽理工大学 | Engineering geological crack measuring device |
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| CN114485332A (en) * | 2022-01-24 | 2022-05-13 | 池州市九华明坤铝业有限公司 | Flat width and parallelism measuring device |
| CN216869435U (en) * | 2022-03-09 | 2022-07-01 | 重庆强捷钢结构有限公司 | Steel construction levelness detection device |
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| CN114941978A (en) | 2022-08-26 |
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