CN201069403Y - An axis gravity sensor for measuring lifting force of tower crane - Google Patents
An axis gravity sensor for measuring lifting force of tower crane Download PDFInfo
- Publication number
- CN201069403Y CN201069403Y CNU2007200732310U CN200720073231U CN201069403Y CN 201069403 Y CN201069403 Y CN 201069403Y CN U2007200732310 U CNU2007200732310 U CN U2007200732310U CN 200720073231 U CN200720073231 U CN 200720073231U CN 201069403 Y CN201069403 Y CN 201069403Y
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- China
- Prior art keywords
- tower crane
- gravity
- sensor
- shaft
- gravity sensor
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- Expired - Fee Related
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Abstract
The utility model belongs to the technical field of construction machinery, specifically an axial gravity sensor used for measuring the lifting force of a tower crane. The sensor comprises a shaft with the same diameter as the fixed pin shaft on the gravity limiter of the tower crane and a strain sheet. The shaft is drilled with two holes, and the strain sheet is attached to the two holes. The strain sheet is connected with a protection/conditioning circuit via wires, and guided to the mainframe of a recorder by an A/D conversion module. The shaft is coaxially fixed with the fixed pin shaft on the gravity limiter of the tower crane. The sensor has the advantages of reasonable structure, easy installation, good property of thermal compensation, good capability of overload resistance, and stable performance.
Description
Technical field
The utility model should belong to the building machinery technical field, be specifically related to the gravity sensor that a kind of tower crane safety detection that is used for building machinery is used, its effect is a lifting power of measuring tower crane, is an ingredient of TD series tower crane secure data registering instrument.
Background technology
Tower crane is the most widely used vertical transportation machinery in building ground, is bearing a large amount of vertical transport tasks at the construction field (site).The use of tower crane is frequent, along with the machinery growth of tenure of use, brings a lot of problems for the use of tower crane, often because machinery is outmoded, lacks the security incident that maintenance causes the tower machine.According to existing design of tower crane standard, be by the design of the working cycle number of times of tower machine the serviceable life of tower crane, but because the tower machine that uses all can write down the registering instrument of tower machine operating position and overload less than installing at present, can't correctly grasp tower machine operating position, can't grasp tower machine working condition in use and frequent degree, overload situation violating the regulations etc., bring difficulty for the assessment in serviceable life of tower machine, also can't implement tower machine system of scrapping.
At present, the sensor great majority that are applied to its lifting power of measurement on the tower crane all use foil gauge structure or non-axle type structure.Its foil gauge of the gravity sensor of foil gauge structure is exposed in the air, is subjected to the influence of surrounding environment easily, causes the data error of measuring not long than the serviceable life of big and sensor; Machinery locations of structures anxiety when the gravity sensor of non-axle type structure is installed the tower machine needs the original structure of change tower machine and installs to be difficult for.
Summary of the invention
The purpose of this utility model is to provide a kind of long service life, axle type gravity sensor simple in structure, easy for installation.This sensor is not only rational in infrastructure, simple installation, and temperature compensation characteristic is good, anti-overload ability strong, working stability.
The axle type gravity sensor that the utility model proposes is made up of axle and foil gauge that diameter is identical with fixed pin shaft on the tower crane gravity limiter, is drilled with two holes on axle, and the aperture is Ф 5～Ф 12, and foil gauge is affixed in two holes; Foil gauge is connected with the protection modulate circuit by electric wire, and via being connected to the registering instrument main frame behind the A/D modular converter, wherein foil gauge is an outsourcing piece, and axle is fixed with the fixed pin on the gravity limiter of tower crane is coaxial.
When tower machine hoisting heavy; the gravity sensor that is installed on the gravity limiter is subjected to shearing force; foil gauge stress deformation in the sensor produces electric signal; by the protection modulate circuit in the lifting power data acquisition unit nonlinear properties are adjusted to linear signal and amplification; by the A/D modular converter analog signal conversion is become digital signal again, be transferred to the registering instrument main frame at last and handle.
During concrete the use two gravity sensors are installed in the right and left of crane gravity limiter respectively, rely on the shaft shoulder and the split pin of sensor itself to fix its axial location, and with the rotation of rectangle limited block limiting sensor self.This sensor is not only rational in infrastructure, simple installation, and temperature compensation characteristic is good, anti-overload ability strong, working stability.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the positive diagram of a type gravity sensor.
Fig. 2 is a type gravity sensor side diagram.
Fig. 3 is a lifting power sensor-based system block diagram.
Fig. 4 is the stressed synoptic diagram of gravity sensor on tower crane.
Number in the figure: 1. electric wire, 2. electric wire guide pin bushing, 3. sensor body, the hole of 4. pasting foil gauge, 5. wear cotter-pin hold, 6. fixed stop, 7. bolt, 8. gravity limiter, 9. fixed mount, 10. display, 11. microprocessor data handling recording systems, 12. lifting power data acquisition units.
Embodiment
Adopt the 40CrNiMoA material, the preparation diameter is the axle of Ф 25, and the fixed pin shaft diameter on the gravity stop of tower crane is Ф 25 usually, and two holes are bored at the place in the middle of axle, diameter is 6～10 millimeters, commercial foil gauge is affixed in two holes, forms axle type gravity sensor, before the installation, earlier the axle of having strong market potential that is contained in a diameter Ф 25 on the gravity limiter is taken off, again gravity sensor is installed on both sides respectively, and adjusts loading angle, insert split pin and fix.The place, shaft shoulder plane of being close to gravity sensor installs and fixes block, prevent that gravity sensor from producing rotation when stressed, cause foil gauge to be subjected to force direction to change that (foil gauge stressed has directivity, onesize masterpiece is used on the foil gauge, when being subjected to force direction different, different data will be obtained).It is that vertical shaft shoulder plane is located inwards that its ideal is subjected to force direction.After gravity sensor installs, two wires are connected to, are connected on the registering instrument main frame by cable again.When the registering instrument host power supply is opened, by cable, electric wire be transferred to lifting power collector two ends provide 0～+ voltage of 5V, and power to foil gauge.
The key technical indexes is as follows:
A). working temperature-20 ℃～+ 60 ℃,
B). relative humidity 95%RH (40 ℃),
C). power supply (220
-33 + 22) V/ (50 ± 1) Hz,
D). measurement range 0～10T,
E). 4% of the full amplitude of measuring accuracy.
Claims (1)
1. one kind is used for the axle type sensor that the tower crane lifting power is measured, it is characterized in that by the fixed pin shaft on the gravity stop of diameter and tower crane identical spool and foil gauge constitute, be drilled with two holes on this axle, foil gauge is affixed in these two holes; Foil gauge is connected with the protection modulate circuit by electric wire, guides to the registering instrument main frame via connecing behind the A/D modular converter, and axle is fixed with the fixed pin shaft on the gravity stop of tower crane is coaxial.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200732310U CN201069403Y (en) | 2007-08-02 | 2007-08-02 | An axis gravity sensor for measuring lifting force of tower crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200732310U CN201069403Y (en) | 2007-08-02 | 2007-08-02 | An axis gravity sensor for measuring lifting force of tower crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201069403Y true CN201069403Y (en) | 2008-06-04 |
Family
ID=39490792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200732310U Expired - Fee Related CN201069403Y (en) | 2007-08-02 | 2007-08-02 | An axis gravity sensor for measuring lifting force of tower crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201069403Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865672A (en) * | 2016-06-14 | 2016-08-17 | 广东精铟海洋工程股份有限公司 | High-sensitivity rack load measuring device based on radial through hole |
| CN106017918A (en) * | 2016-06-14 | 2016-10-12 | 广东精铟海洋工程股份有限公司 | Marine engineering lifting platform rack load measuring device |
-
2007
- 2007-08-02 CN CNU2007200732310U patent/CN201069403Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865672A (en) * | 2016-06-14 | 2016-08-17 | 广东精铟海洋工程股份有限公司 | High-sensitivity rack load measuring device based on radial through hole |
| CN106017918A (en) * | 2016-06-14 | 2016-10-12 | 广东精铟海洋工程股份有限公司 | Marine engineering lifting platform rack load measuring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080604 Termination date: 20100802 |