CN111780733A - Method for measuring levelness and verticality of crane beam - Google Patents
Method for measuring levelness and verticality of crane beam Download PDFInfo
- Publication number
- CN111780733A CN111780733A CN202010679135.0A CN202010679135A CN111780733A CN 111780733 A CN111780733 A CN 111780733A CN 202010679135 A CN202010679135 A CN 202010679135A CN 111780733 A CN111780733 A CN 111780733A
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- crane beam
- verticality
- levelness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
- G01C15/10—Plumb lines
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- General Physics & Mathematics (AREA)
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Abstract
The invention discloses a method for measuring the levelness and the verticality of a crane beam, which is implemented by the following steps: s1, manufacturing a measuring tool: the measuring tool consists of a base, a supporting rod, a connecting rod and a plumb line weight; s2, installing a measuring tool: after the measuring tools are assembled into a whole, the two measuring tools are sequentially placed on the upper flange of the crane beam in a front-back order; s3, measuring levelness and verticality: after the measuring tools are manufactured, a level is placed on the ground, the level is placed between a front measuring tool and a rear measuring tool, two points on the same horizontal line are respectively measured on the plumb bob on two sides and marked, the height of each marked part and the lower end of the plumb bob is measured through a tape measure, and the levelness is judged according to the consistency of the heights; and (3) respectively measuring the distances between the two sides of the top flange of the crane beam and the corresponding plumb line plummets through the tape measure at high altitude, and judging the verticality according to whether the distances are consistent. The method is simple to operate, high in precision and low in risk.
Description
Technical Field
The invention relates to the technical field of measurement, in particular to a method for measuring the levelness and the verticality of a crane beam.
Background
When measuring the levelness and verticality of a crane beam, the tools traditionally used are gradienters and theodolites. The traditional measuring method needs a measurer to ascend, and the measuring instrument is also erected on the upper flange of the crane beam to measure. For measuring personnel, the traditional method needs to operate the measuring instrument all the time at high altitude for measurement, so that the method has great danger, meanwhile, the instrument is erected on the upper flange of the crane beam and has instability, and the error of measured data is large.
Disclosure of Invention
Aiming at the technical problems, the invention provides a method for measuring the levelness and the verticality of a crane beam, which is realized by a measuring tool manufactured by the inventor, so that the operation of a professional measuring instrument in high altitude is reduced.
The invention adopts the following technical scheme:
a method for measuring the levelness and the verticality of a crane beam is implemented by the following steps:
s1, manufacturing a measuring tool: the measuring tool consists of a base, a support rod, a connecting rod and a plumb line weight, wherein the lower end of the support rod is arranged on the base, the connecting rod is arranged in parallel to the horizontal plane, the central point is arranged at the upper end of the support rod, the two ends of the connecting rod are respectively connected with the plumb line weight, and the length of the connecting rod is greater than the width of the crane beam;
s2, installing a measuring tool: after the measuring tools are assembled into a whole, the two measuring tools are sequentially placed on the upper flange of the crane beam in a front-back order, wherein the supporting rod of each measuring tool is positioned on the central line of the upper flange of the crane beam, and the plumb line is suspended above the ground;
s3, measuring levelness and verticality: after the measuring tools are manufactured, a level gauge is placed on the ground and is arranged between the front measuring tool and the rear measuring tool, two points on the same horizontal line are respectively measured on the plumb bob on the two sides and marked, the height of each marked part and the lower end of the plumb bob is measured through a tape measure, if the heights are consistent, the levelness of the crane beam is shown to be in accordance with the standard requirement, otherwise, the levelness of the crane beam is not in accordance with the standard requirement; and respectively measuring the distances between the two sides of the upper flange of the crane beam and the corresponding plumb line drop through the measuring tape at high altitude, wherein if the two distances are consistent, the verticality of the crane beam is in accordance with the standard requirement, otherwise, the verticality of the crane beam is not in accordance with the standard requirement.
The measuring method has the advantages that the leveling instrument and the theodolite are prevented from being placed at high altitude for measurement, the risk of high-altitude operation is reduced, whether the levelness and the verticality of the crane beam meet the requirements or not can be judged only by the assistance of a common tape measure tool and the measurement of the leveling instrument on the ground, the specific offset is obtained, and the measuring tool is simple to manufacture and high in accuracy.
Further, the base is a weighted plate.
Drawings
FIG. 1 is a front view of a measurement tool of the present invention in use;
FIG. 2 is a side view of a measurement tool of the present invention in use;
in the figure: 1-a base; 2-a support rod; 3-a connecting rod; 4-plumb line weight; 5-crane beam; 6-a level gauge; d, d' -distance; h, h' -height.
Detailed Description
The invention will be further described with reference to specific embodiments. It is to be understood that the following description is only for purposes of clearly illustrating the present invention and is not to be taken in a limiting sense.
Referring to fig. 1 and 2, a method for measuring levelness and verticality of a crane beam is implemented by the following steps:
s1, manufacturing a measuring tool: the measuring tool of the invention is composed of a base 1, a support rod 2, a connecting rod 3 and a plumb line bob 4; base 1 is for aggravating the board, be 50mm by thickness, length is 100mm, the width is made for 100 mm's steel sheet, stability for strengthening whole device, bracing piece 2 and connecting rod 3 adopt the diameter to be 16 mm's reinforcing bar preparation separately, the length of connecting rod 3 is greater than crane beam 5's width, the central point that base 1 was welded to 2 lower extremes of bracing piece puts, connecting rod 3 is on a parallel with the horizontal plane setting, the bracing piece 2 upper ends are welded to the central point, the plumb line weighs down 4 is connected respectively at 3 both ends of connecting rod.
S2, installing a measuring tool: after the measuring tools are manufactured, the two measuring tools are sequentially placed on the top flange of the crane beam 5 in a front-back order, and the base 1 is a weighting plate, so that the stability of the base is ensured, wherein the supporting rod of each measuring tool is positioned on the central line of the top flange of the crane beam 5, and the plumb line weight 4 is suspended above the ground by about 1 m.
S3, measuring levelness and verticality: after the measuring tools are installed, a level 6 is placed on the ground, the level 6 is placed between a front measuring tool and a rear measuring tool, two points on the same horizontal line are respectively measured on the plumb line plummets 4 on two sides and marked, and the heights h and h 'between each marked position and the lower end of the plumb line plummets 4 are measured through a measuring tape, if h = h', the levelness of the crane beam 5 is shown to meet the standard requirement, otherwise, the levelness of the crane beam 5 is not met the standard requirement; and (3) respectively measuring the distances d and d 'between the two sides of the upper flange of the crane beam 5 and the corresponding plumb bob 4 through a measuring tape at high altitude, if d = d', indicating that the verticality of the crane beam meets the standard requirement, otherwise, not meeting the standard requirement.
The method of the invention is adopted to measure the levelness and the verticality, reduces the risk of high-altitude operation, avoids the measurement data error caused by the installation of a measuring instrument on the crane beam, can judge whether the levelness and the verticality of the crane beam meet the requirements only by the assistance of a common tape measure tool and the measurement of a level gauge on the ground, and obtains the specific offset, and the measuring tool has simple manufacture and high precision.
The foregoing is only a preferred embodiment of the present invention. Various modifications and equivalent changes may be made by those skilled in the art without departing from the spirit and scope of the present invention, and such modifications and changes are intended to be included within the scope of the present invention.
Claims (2)
1. A method for measuring the levelness and the verticality of a crane beam is characterized by comprising the following steps of:
s1, manufacturing a measuring tool: the measuring tool consists of a base, a support rod, a connecting rod and a plumb line weight, wherein the lower end of the support rod is arranged on the base, the connecting rod is arranged in parallel to the horizontal plane, the central point is arranged at the upper end of the support rod, the two ends of the connecting rod are respectively connected with the plumb line weight, and the length of the connecting rod is greater than the width of the crane beam;
s2, installing a measuring tool: after the measuring tools are assembled into a whole, the two measuring tools are sequentially placed on the upper flange of the crane beam in a front-back order, wherein the supporting rod of each measuring tool is positioned on the central line of the upper flange of the crane beam, and the plumb line is suspended above the ground;
s3, measuring levelness and verticality: after the measuring tools are manufactured, a level gauge is placed on the ground and is arranged between the front measuring tool and the rear measuring tool, two points on the same horizontal line are respectively measured on the plumb line pendants on two sides and marked, the height of each marked part and the lower end of the line pendant is measured through a measuring tape, if the heights are consistent, the levelness of the crane beam is shown to be in accordance with the specification requirement, otherwise, the levelness of the crane beam is not in accordance with the specification requirement; and respectively measuring the distances between the two sides of the upper flange of the crane beam and the corresponding plumb line drop through the measuring tape at high altitude, wherein if the two distances are consistent, the verticality of the crane beam is in accordance with the standard requirement, otherwise, the verticality of the crane beam is not in accordance with the standard requirement.
2. The method of measuring the levelness and verticality of a crane beam according to claim 1, wherein the base is a weighted plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010679135.0A CN111780733B (en) | 2020-07-15 | 2020-07-15 | Method for measuring levelness and verticality of crane beam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010679135.0A CN111780733B (en) | 2020-07-15 | 2020-07-15 | Method for measuring levelness and verticality of crane beam |
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| CN111780733A true CN111780733A (en) | 2020-10-16 |
| CN111780733B CN111780733B (en) | 2022-01-07 |
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Citations (12)
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2020
- 2020-07-15 CN CN202010679135.0A patent/CN111780733B/en active Active
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| CN104359469A (en) * | 2014-11-25 | 2015-02-18 | 杨树成 | Suspension wire device |
| CN104634267A (en) * | 2015-01-09 | 2015-05-20 | 河南省特种设备安全检测研究院 | Camber measuring method of overhead and gantry crane and matched measuring device |
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| CN111780733B (en) | 2022-01-07 |
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