CN106352851B - A kind of level measurement device for column foot - Google Patents

A kind of level measurement device for column foot Download PDF

Info

Publication number
CN106352851B
CN106352851B CN201610830703.6A CN201610830703A CN106352851B CN 106352851 B CN106352851 B CN 106352851B CN 201610830703 A CN201610830703 A CN 201610830703A CN 106352851 B CN106352851 B CN 106352851B
Authority
CN
China
Prior art keywords
laser
bar
mapping plate
column foot
shell
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.)
Active
Application number
CN201610830703.6A
Other languages
Chinese (zh)
Other versions
CN106352851A (en
Inventor
李燕
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.)
Chengdu Jiushidu Industrial Product Design Co Ltd
Original Assignee
Chengdu Jiushidu Industrial Product Design 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 Chengdu Jiushidu Industrial Product Design Co Ltd filed Critical Chengdu Jiushidu Industrial Product Design Co Ltd
Priority to CN201610830703.6A priority Critical patent/CN106352851B/en
Publication of CN106352851A publication Critical patent/CN106352851A/en
Application granted granted Critical
Publication of CN106352851B publication Critical patent/CN106352851B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C9/00Measuring inclination, e.g. by clinometers, by levels

Abstract

The present invention relates to the measuring tool fields installed for tower crane for building, especially a kind of level measurement device for column foot, including cross frame with the first laser generator and the first mapping plate for being respectively arranged on one opposite side of cross frame, set on another opposite side second laser generator of cross frame and the second mapping plate;The laser in first laser generator and second laser generator emission level direction always be respectively radiated in the first mapping plate and the second mapping plate on.The structure is by remaining horizontal laser, can accurately judge whether the junction of column foot and tower crane is horizontal, rather than from horizontality is macroscopically seen, it measures more accurate and reliable, by the characteristic using laser, it is capable of the accuracy of more accurate determined level measurement.Amplify the distance of inclined angle by larger distance, to be conducive to inclined judgement.It can use gravity, so that laser emitter is remained horizontal, thus the accuracy for measurement of improving the standard.

Description

A kind of level measurement device for column foot
Technical field
The present invention relates to the measuring tool field installed for tower crane for building, especially a kind of level for column foot is surveyed Measure device.
Background technique
Tower crane installation needs foundation on the ground;Tower body is tower crane body and raised part;Jacking part is Tower crane is increased;Revolution is to maintain what tower crane can rotate horizontally above the waist;Lifting mechanism is used to play heavy lift Come;Balance cantilever crane is to maintain equalising torque;Elevator boom rack is generally exactly the part of the force of lifting heavy;Trolley is used to install Pulley blocks and steel cable and suspension hook, and it is stressed directly part;Tower top is certainly used to keep cantilever crane stress balance;Driver Room is the place of operation;Luffing is so that trolley orbiting.
In the installation process of tower crane, the qualification of column foot becomes most important safety assurance in tower crane use process, column foot Timely 1 degree of deflection, also being caused damages using safe to column foot, therefore, it is necessary to a kind of devices that can measure column foot level. Now horizontal calibration often uses weight, but weight is often larger in vertical direction the space occupied, is unfavorable for surface water Flat measurement, furthermore, it is necessary to which the calibration of long period, is affected by wind-force or other factors, volume is larger.
Summary of the invention
Goal of the invention of the invention is: in view of the above problems, providing a kind of horizontal measurement dress for column foot It sets, by remaining horizontal laser, can accurately judge whether the junction of column foot and tower crane is horizontal, rather than from macro Horizontality is seen in sight, measurement is more accurate and reliable, being capable of more accurate determined level survey by the characteristic using laser The accuracy of amount.Amplify the distance of inclined angle by larger distance, to be conducive to inclined judgement.It can use weight Power makes laser emitter remain horizontal, thus the accuracy for measurement of improving the standard.Using laser high aggregation and compared with The characteristics of strong propagation distance, realizes that horizontal direction emits laser, swims in laser on the water surface always, to guarantee laser It is horizontal project, the structure is simple, without calibration, can prevent other factors from reducing the body of structure to the influence of horizontal alignment Product.
The technical solution adopted by the invention is as follows:
The invention discloses a kind of level measurement device for column foot, including cross frame and it is respectively arranged on cross frame The first laser generator of one opposite side and the first mapping plate are reflected set on another opposite side second laser generator of cross frame and second Penetrate plate;The laser in first laser generator and second laser generator emission level direction always is respectively radiated to the first mapping plate In upper and the second mapping plate.The structure can accurately judge the company of column foot and tower crane by remaining horizontal laser Whether horizontal meet place, rather than from horizontality is macroscopically seen, measurement is more accurate and reliable, passes through the characteristic using laser, energy The accuracy of enough more accurate determined level measurements.Amplify the distance of inclined angle by larger distance, thus favorably In inclined judgement.It can use gravity, so that laser emitter is remained horizontal, thus the accuracy for measurement of improving the standard.
Further, in the first mapping plate or the second mapping plate has the lateral scale and longitudinal scale of intersection, work as cross When frame level, point of intersection of the laser irradiation to lateral scale and longitudinal scale.By the design of scale, it is inclined that observation can be convenient to Gradient, to improve the accuracy of the horizontal measurement of structure.
Further, it is respectively arranged with alignment device in four arm lower parts of cross frame, the lower end of alignment device is used In alignment tower crane in the installation place of column foot.The accuracy that the alignment device can be adjusted effectively, can be to the installation point of tower crane Carry out precise measurement.
Further, alignment device includes two contraposition bars and adjustment bar, and one end of two contraposition bars is hinged, the other end It is slidably connected on cross frame respectively;Adjustment bar is articulated with the middle parts of two contraposition bars, for adjust two contraposition bars away from From.The contraposition of the structure by way of contraposition, is realized to the measurement in short supply of column foot installation electricity in device, is convenient to column foot Amendment, reduces the amendment difficulty of column foot.
Further, the first mapping plate or the second mapping plate, which are met to the side of laser, has photic zone, the first mapping plate or the Two mapping plates have translucent polishing layer backwards to the side of laser, are provided with scale on layer of polishing.The structure can be convenient to Laser projects in mapping plate, is conducive to the observation and inspection of horizontality.
Further, laser generator includes shell, the laser of bar shaped, floating body, cross connecting rod, lateral rotation bar, longitudinal direction Rotating bar and fixing piece, the interior Packed cavity of tool of shell, cavity are provided with transparency liquid, and floating body is wrapped in outside laser simultaneously Laser level is set to float on liquid level;The hinged cross connecting rod in center of gravity, the other side of the hinged laser in lateral rotation bar one end, makes Lateral rotation bar can be around cross connecting rod lateral rotation;The hinged cross connecting rod in one end, the hinged fixing piece of the other end of bar are longitudinally rotated, Making to longitudinally rotate bar can longitudinally rotate around fixing piece, and fixing piece is fixedly connected with the bottom wall of shell, laser caused by laser Across shell horizontal injection always.The design of the structure swims in laser on the water surface always using the buoyancy of liquid, from And guaranteeing that the horizontal of laser is projected, the use of structure is simple, and without calibration, good airproof performance can prevent other factors to water The influence of flat calibration, reduces the volume of structure.
Further, shell is in a strip shape, and in housing bottom setting, there are three foot stabilizations, and glass is arranged in the laser emitting side of shell Glass layer, position corresponding with the glassy layer is provided with through-hole on shell, and glassy layer covers and seals the through-hole;It is provided on shell For controlling the controller of laser intensity, the supply lines of laser is brought out from the position of the corresponding shell of laser center of gravity line And be electrically connected with the controller, laser is located at the 70-80% that subsurface part accounts for laser volume, the laser output of laser Mouth is located under liquid level;In lateral rotation bar, longitudinally rotates and be separately provided for offsetting the floating of its gravity in bar or cross connecting rod Item;The 65-80% of the volume station cavity volume of transparency liquid, the consistency of transparency liquid are 3-7 centipoise.Liquid can be effectively improved The validity of transfer laser in medium can reduce influence of the liquid flowing to laser water Pingdu, can reduce the flowing of liquid Property, it improves laser and reaches horizontal speed.
Further, mapping plate has the lateral scale and longitudinal scale of intersection, and when cross frame level, laser irradiation is arrived The point of intersection of lateral scale and longitudinal scale, is respectively arranged with alignment device, alignment device in four arm lower parts of cross frame Lower end for being directed at tower crane in the installation place of column foot, alignment device includes two contraposition bars and adjustment bar, two contrapositions One end of bar is hinged, the other end is slidably connected to respectively on cross frame;Adjustment bar is articulated with the middle part of two contraposition bars, For adjusting the distance of two contraposition bars, the first mapping plate or the second mapping plate, which are met to the side of laser, has a photic zone, and first Mapping plate or the second mapping plate have translucent polishing layer backwards to the side of laser, are provided with scale on layer of polishing.The structure It can be convenient to measure, use is simple and reliable, it is only necessary to open laser, when laser reaches level with liquid level, directly see Laser position is examined, using simple, without training.
Further, measurement method are as follows:
Step 1: the alignment device below four arms of cross frame being adjusted to contour, then, adjust alignment device Relative position make alignment device lower end aligned column foot and tower crane to link position;
Step 2: whether four alignment device lower parts of observation contact column foot, to judge that column foot waits for the smooth of joint face;
Step 3: opening first laser generator and second laser generator, laser level is irradiated to the first mapping plate and the In two mapping plates;Observe the horizontality that position of the laser in mapping plate judges column foot face.The structure.
The structure, method is measured by four points to the fixed position of tower crane, to guarantee the safety of tower crane installation Reliability can effectively ensure that the safety of equipment, can effectively improve the availability and ease of use of device, and reducing should The use difficulty of structure.
Further, the liquid is made of the material of following parts by weight: 6 parts of emulsified wax slurries, 17 parts of Lauxites, 6 parts Sodium thiosulfate, 6 parts of polyvinyl alcohol, 4 parts of acetic acid, 16 parts of hide glues, 13 parts of emulsifiers, 8 parts of propionic acid alcohol, 14 parts of sodium hydroxides, 22 Part polyacrylamide, 7 parts of butadiene rubbers, 8 parts of pine tars, 12 parts of microwaxes, 9 parts of stearic acid, appropriate amount of deionized water.
The liquid of the ingredient, the transparency is high, and toughness is good, reduces liquid by the fluctuation of external force, is reducing liquid flow In the case where dynamic property, the speed that liquid restores horizontal is improved, laser is improved and automatically adjusts speed.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
1. can accurately judge whether the junction of column foot and tower crane is horizontal by remaining horizontal laser, Rather than from horizontality is macroscopically seen, measurement is more accurate and reliable, by the characteristic using laser, can more accurately sentence The accuracy of disconnected horizontal measurement.
2. amplifying the distance of inclined angle by larger distance, to be conducive to inclined judgement.It can use weight Power makes laser emitter remain horizontal, thus the accuracy for measurement of improving the standard.
3. the characteristics of high aggregation and stronger propagation distance of utilization laser, realizing that horizontal direction emits laser, making Laser is swum on the water surface always, to guarantee that the horizontal of laser is projected, the structure is simple, without calibration, can prevent it His influence of the factor to horizontal alignment, reduces the volume of structure.
Detailed description of the invention
Examples of the present invention will be described by way of reference to the accompanying drawings, in which:
Fig. 1 is the top view of the level measurement device for column foot;
Fig. 2 is the side view of Fig. 1;
Fig. 3 is the structure chart of laser generator.
Appended drawing reference: 1- shell, 2- laser, 3- cross connecting rod, 4- lateral rotation bar, 5- longitudinally rotate bar, and 6- is fixed Part, 7- cross frame, 8- alignment device, the first mapping plate of 9-, the second mapping plate of 10- (10), 11- second laser generator (11).
Specific embodiment
Embodiment 1
As shown in Figure 1, of the invention, the invention discloses a kind of level measurement devices for column foot, which is characterized in that Including cross frame 7 with the first laser generator and the first mapping plate 9 for being respectively arranged on 7 one opposite side of cross frame, set on cross Another opposite side second laser generator 11 of shape frame 7 and the second mapping plate 10;First laser generator and second laser generator 11 Always the laser in emission level direction be respectively radiated in the first mapping plate 9 and the second mapping plate 10 on.
In first mapping plate 9 or the second mapping plate 10 has the lateral scale and longitudinal scale of intersection, when 7 water of cross frame Usually, point of intersection of the laser irradiation to lateral scale and longitudinal scale.By the design of scale, observation deflection can be convenient to Amount, to improve the accuracy of the horizontal measurement of structure.
Be respectively arranged with alignment device 8 in four arm lower parts of cross frame 7, the lower end of alignment device 8 for pair Quasi- tower crane is in the installation place of column foot.Alignment device 8 includes two contraposition bars and adjustment bar, and one end of two contraposition bars is mutually cut with scissors It connects, the other end is slidably connected to respectively on cross frame 7;Adjustment bar is articulated with the middle part of two contraposition bars, for adjusting two Align the distance of bar.
First mapping plate 9 or the second mapping plate 10, which are met to the side of laser, has photic zone, and the first mapping plate 9 or the second is reflected Penetrating plate 10 has translucent polishing layer backwards to the side of laser, is provided with scale on layer of polishing.
Laser generator includes shell 1, the laser 2 of bar shaped, floating body, cross connecting rod 3, lateral rotation bar 4, longitudinally rotates Bar 5 and fixing piece 6, the interior Packed cavity of tool of shell 1, cavity are provided with transparency liquid, and floating body is wrapped in outside laser 2 simultaneously 2 level of laser is set to float on liquid level;The hinged cross connecting rod in center of gravity, the other side of the hinged laser 2 in 4 one end of lateral rotation bar 3, make lateral rotation bar 4 can be around 3 lateral rotation of cross connecting rod;Longitudinally rotate the hinged cross connecting rod 3 in one end, the other end hinge of bar 5 Fixing piece 6 is connect, making to longitudinally rotate bar 5 can longitudinally rotate around fixing piece 6, and fixing piece 6 is fixedly connected with the bottom wall of shell 1, laser Laser caused by device 2 passes through the horizontal injection always of shell 1.
Shell 1 is in a strip shape, and in 1 bottom of shell, there are three foot stabilizations for setting, and glass is arranged in the laser emitting side of shell 1 Layer, position corresponding with the glassy layer is provided with through-hole on shell 1, and glassy layer covers and seals the through-hole;It is provided on shell 1 For controlling the controller of laser intensity, the supply lines of laser 2 is from quilt from the position of the corresponding shell 1 of 2 center of gravity line of laser It draws and is electrically connected with the controller, laser 2 is located at the 70-80% that subsurface part accounts for 2 volume of laser, and laser 2 swashs Light output mouth is located under liquid level;In lateral rotation bar 4, longitudinally rotates and be separately provided for offsetting in bar 5 or cross connecting rod 3 The floating item of its gravity;The 65-80% of the volume station cavity volume of transparency liquid, the consistency of transparency liquid are 3-7 centipoise.
Embodiment 2
Based on the level measurement device of embodiment 1, measurement method are as follows:
Step 1: the alignment device 8 below four arms of cross frame 7 is adjusted to it is contour, then, adjust alignment device 8 Relative position make alignment device 8 lower end aligned column foot and tower crane to link position;
Step 2: whether four 8 lower parts of alignment device of observation contact column foot, to judge that column foot waits for the smooth of joint face;
Step 3: opening first laser generator and second laser generator 11, laser level are irradiated to the first mapping plate 9 In the second mapping plate 10;Observe the horizontality that position of the laser in mapping plate judges column foot face.The structure.
The structure, method is measured by four points to the fixed position of tower crane, to guarantee the safety of tower crane installation Reliability can effectively ensure that the safety of equipment, can effectively improve the availability and ease of use of device, and reducing should The use difficulty of structure.
Embodiment 3
Based on the level measurement device of embodiment 1, liquid is made of the material of following parts by weight: 6 parts of emulsified wax slurries, 17 Part Lauxite, 6 parts of sodium thiosulfate, 6 parts of polyvinyl alcohol, 4 parts of acetic acid, 16 parts of hide glues, 13 parts of emulsifiers, 8 parts of propionic acid alcohol, 14 Part sodium hydroxide, 22 parts of polyacrylamides, 7 parts of butadiene rubbers, 8 parts of pine tars, 12 parts of microwaxes, 9 parts of stearic acid, go in right amount from Sub- water.

Claims (7)

1. a kind of level measurement device for column foot, which is characterized in that including cross frame (7) and be respectively arranged on cross frame The first laser generator and the first mapping plate (9) of (7) one opposite sides are set to cross frame (7) another opposite side second laser generation Device (11) and the second mapping plate (10);Emission level direction is swashed always for first laser generator and second laser generator (11) Light be respectively radiated on the first mapping plate (9) and the second mapping plate (10) on;
First laser generator and second laser generator include laser generator;Laser generator includes shell (1), bar shaped Laser (2), floating body, cross connecting rod (3), lateral rotation bar (4), longitudinally rotate bar (5) and fixing piece (6), shell (1) The interior Packed cavity of tool, cavity are provided with transparency liquid, and floating body is wrapped in laser (2) outside and makes the horizontal drift of laser (2) Float on liquid level;The hinged cross connecting rod in center of gravity, the other side (3) of the hinged laser in lateral rotation bar (4) one end (2), makes transverse direction Rotating bar (4) can be around cross connecting rod (3) lateral rotation;Longitudinally rotate the hinged cross connecting rod in one end (3), the other end hinge of bar (5) Fixing piece (6) are connect, making to longitudinally rotate bar (5) can longitudinally rotate around fixing piece (6), and fixing piece (6) and the bottom wall of shell (1) are fixed It connects, laser caused by laser (2) passes through shell (1) horizontal injection always.
2. being used for the level measurement device of column foot as described in claim 1, which is characterized in that in the first mapping plate (9) or the Two mapping plates (10) have the lateral scale intersected and longitudinal scale, when cross frame (7) level, laser irradiation to laterally quarter The point of intersection of degree and longitudinal scale.
3. being used for the level measurement device of column foot as described in claim 1, which is characterized in that at four of cross frame (7) Arm lower part is respectively arranged with alignment device (8), and the lower end of alignment device (8) is for being directed at tower crane in the installation place of column foot.
4. being used for the level measurement device of column foot as claimed in claim 3, which is characterized in that alignment device (8) includes two Bar and adjustment bar are aligned, one end of two contraposition bars is hinged, the other end is slidably connected to respectively on cross frame (7);It adjusts Whole bar is articulated with the middle part of two contraposition bars, for adjusting the distance of two contraposition bars.
5. being used for the level measurement device of column foot as described in claim 1, which is characterized in that the first mapping plate (9) or second Mapping plate (10), which is met to the side of laser, has photic zone, the first mapping plate (9) or the second mapping plate (10) backwards to the one of laser Side has translucent polishing layer, is provided with scale on layer of polishing.
6. being used for the level measurement device of column foot as described in claim 1, which is characterized in that shell (1) is in a strip shape, in shell (1) bottom setting is there are three foot stabilization, is arranged glassy layer in the laser emitting side of shell (1), on shell (1) with the glassy layer pair The position answered is provided with through-hole, and glassy layer covers and seals the through-hole;The control for controlling laser intensity is provided on shell (1) Device processed, the supply lines of laser (2) is brought out from the position of the corresponding shell (1) of laser (2) center of gravity line and and controller Electrical connection, laser (2) are located at the 70-80% that subsurface part accounts for laser (2) volume, the laser output of laser (2) Under liquid level;Lateral rotation bar (4), longitudinally rotate bar (5), be separately provided in cross connecting rod (3) offsetting its it is heavy The floating item of power;The 65-80% of the volume duty cavity volume of transparency liquid, the consistency of transparency liquid are 3-7 centipoise.
7. being used for the level measurement device of column foot as described in claim 1, which is characterized in that mapping plate has the transverse direction of intersection Scale and longitudinal scale, when cross frame (7) level, the point of intersection of laser irradiation to lateral scale and longitudinal scale, ten Four arm lower parts of shaped frame (7) are respectively arranged with alignment device (8), and the lower end of alignment device (8) is for being directed at tower crane In the installation place of column foot, alignment device (8) includes two contraposition bars and adjustment bar, and one end of two contraposition bars is hinged, separately One end is slidably connected to respectively on cross frame (7);Adjustment bar is articulated with the middle part of two contraposition bars, for adjusting two contrapositions The distance of bar, the first mapping plate (9) or the second mapping plate (10), which are met to the side of laser, has photic zone, the first mapping plate (9) Or second mapping plate (10) backwards to laser side have translucent polishing layer, polish layer on be provided with scale.
CN201610830703.6A 2016-09-19 2016-09-19 A kind of level measurement device for column foot Active CN106352851B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610830703.6A CN106352851B (en) 2016-09-19 2016-09-19 A kind of level measurement device for column foot

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610830703.6A CN106352851B (en) 2016-09-19 2016-09-19 A kind of level measurement device for column foot

Publications (2)

Publication Number Publication Date
CN106352851A CN106352851A (en) 2017-01-25
CN106352851B true CN106352851B (en) 2018-12-14

Family

ID=57859642

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610830703.6A Active CN106352851B (en) 2016-09-19 2016-09-19 A kind of level measurement device for column foot

Country Status (1)

Country Link
CN (1) CN106352851B (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19644701A1 (en) * 1996-10-16 1998-04-30 Tanis Necdet Cross-shaped spacer tool and spirit level
CN1472506A (en) * 2003-07-09 2004-02-04 雄 武 Buoyance positioning laser reference line projector
CN201016725Y (en) * 2007-03-28 2008-02-06 云南昆船设计研究院 Ground surface four-point planeness measuring instrument
CN202074973U (en) * 2011-04-02 2011-12-14 重庆工程职业技术学院 Floating ball type laser positioner
CN202501844U (en) * 2012-03-23 2012-10-24 杨广民 Square cross-shaped level gauge
CN104554341B (en) * 2014-12-06 2017-11-03 呼和浩特铁路局科研所 The system and method for detecting rail smooth degree
CN205426087U (en) * 2015-12-18 2016-08-03 江苏爱仕特精密电子科技有限公司 Special angle measuring tool of optical fiber base product
CN206073975U (en) * 2016-09-19 2017-04-05 江苏建科建设监理有限公司 A kind of level measurement device for column foot

Also Published As

Publication number Publication date
CN106352851A (en) 2017-01-25

Similar Documents

Publication Publication Date Title
BRPI0607509A2 (en) apparatus and method for propelling a support column on underwater substrates
CN103046760B (en) Composite wall board mounting machine and composite wall board mounting method
CN106352851B (en) A kind of level measurement device for column foot
CN202938729U (en) Ranging rod for length and distance measurement by using angle
CN209727919U (en) A kind of adjustable water monitoring device of measurement water level depth
CN206073975U (en) A kind of level measurement device for column foot
CN206696306U (en) A kind of current meter calibration equipment
CN210487017U (en) Circulating tank mud liquid level monitoring device
CN209433035U (en) A kind of test device for the detection of civil engineering bridge security
CN207758963U (en) Unmanned surveying vessel for underwater topography mapping
CN108068992B (en) Hull ultimate strength experimental device
CN105576564B (en) A kind of water proof constructing device for submerged cable connection
CN204902952U (en) Improve husky interface of water appearance of structure
CN205403757U (en) Wall face flatness detection device
CN106081973A (en) Safety and energy-saving digital watershed measure and control device
CN208026577U (en) A kind of natural feather water absorption rate measuring device
CN209841012U (en) A demonstration teaching aid for engineering survey and drawing
CN203881319U (en) A levelness-adjustable bench for measuring tools
CN209069280U (en) A kind of bathymetric surveying device
CN205843965U (en) A kind of factory car performance detector
CN204571971U (en) A kind of convenient gravity laser vertical degree, diameter detecting instrument
CN214999497U (en) High-precision switch pneumatic gate
CN214951153U (en) Elevator guide rail hole site detection device
CN108385736A (en) Passage formula clinoform model foundation level load test device
CN213148008U (en) Multilayer underground water level observation device for hydrogeological hole

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant