CN103017724A - Method for diagnosing sound condition of steel structure and steel structure inclination angle diagnosing device - Google Patents

Abstract

The invention provides a method for diagnosing the sound condition of a steel structure and a steel structure inclination angle diagnosing device used in the method. The device comprises a hoop for hoping a tested device, a pair of fixing columns respectively connected with two ends of the hoop, an inclination angle sensor connected with the other ends of the fixing columns, and a display recording alarming device electrically connected with the inclination angle sensor, wherein the inclination angle sensor is provided with a bayonet which is used for clamping the tested device. According to the device, an obtained inclination angle of the tested device is compared with an inclination angle characteristic model in the sound condition of the tested device, if the tested device is within a sound condition inclination angel characteristic model range, the steel structure of the tested device can be judged to be in the sound condition; and if the tested device is beyond a sound condition tower top inclination angle characteristic model range, the steel structure of the tested device can be judged to be not in the sound condition, and then the display recording alarming module gives an alarm.

Description

The diagnostic method of steel structure sound condition and steel construction inclination angle diagnostic device

[technical field]

The present invention relates to a kind of diagnostic method and the applied inclination angle of the method diagnostic device of mechanical steel structure sound condition.

[background technology]

Engineering machinery tower class steel construction has been brought into play vital role as the visual plant that its people build in the socio-economic development of China.Along with buildings develops to high level, its structure is more and more huger, and workload is increasing, the in addition uncertainty of working environment, and the frequency that security incident occurs is high, wherein typically is exactly tower crane.Tower crane is after installation, and the phenomenon that can occur tilting in order to guarantee the use safety of steel construction, need to be diagnosed inclined degree and angle of inclination that steel construction occurs, to determine that tower crane is in intact or not intact state.

How to confirm steel structure for tower crane inclined degree and angle of inclination are to judge that tower crane is in basis intact or not serviceable condition and difficult point.Different researchers once attempted to set up the tower crane life model with characteristic quantities such as natural frequency, distortion, stress, the life prediction of research steel structure for tower crane, damage.But have no the achievement of energy real-time judge steel structure sound condition aspect.

[summary of the invention]

The technical matters that the present invention need solve provides a kind of diagnostic method and the applied inclination angle of the method diagnostic device of mechanical steel structure sound condition.

According to above-mentioned technical matters, designed a kind of steel construction inclination angle diagnostic device, it comprises a pair of fixed leg that links to each other respectively be used to the anchor ear of waling tested device, with the anchor ear two ends, the obliquity sensor that links to each other with a pair of fixed leg other end and the demonstration record warning device that is electrical connected with obliquity sensor, and described obliquity sensor is provided be used to the bayonet socket that is fastened on the tested device.

Further improve as the present invention, described anchor ear comprises be used to the V-arrangement interlude of waling tested device and the left hand edge section that links to each other with the V-arrangement interlude and right hand edge section, be equipped with threaded hole on the described left and right edge section, described fixed leg is bolt, and described bolt cooperates with threaded hole and links to each other.

Further improve as the present invention, described bayonet socket is V-arrangement.

The diagnostic method of above-mentioned steel structure sound condition comprises:

A, provide a kind of steel construction inclination angle diagnostic device of said structure;

B, above-mentioned steel construction inclination angle diagnostic device is installed on the main limb of tested device;

C, steel construction inclination angle diagnostic device are determined the inclination angle characteristic model of tested device under serviceable condition by gathering the inclination data under tested device zero load and the rated load state;

D, the angle of inclination of the tested device that obtains and the inclination angle characteristic model under the serviceable condition are compared, if the angle of inclination is within this inclination angle characteristic model scope, can judge that then the tested device steel construction is in serviceable condition; If the angle of inclination is in outside this inclination angle characteristic model scope, can judge that then the tested device steel construction is in not serviceable condition, show the warning of record warning device.

The obliquity sensor of steel construction of the present invention inclination angle diagnostic device detects tested device, when the tested device run-off the straight, obliquity sensor can obtain relevant information, this communication is to showing the record warning device, show that recording alarm module signal obliquity sensor is measured and that pass over processes, then calculate the angle of inclination of tested device, and compare with inclination angle characteristic model under the tested device serviceable condition, if tested device is within the characteristic model scope of serviceable condition inclination angle, can judge that then the tested device steel construction is in serviceable condition; If the tested device inclination angle is in outside the characteristic model scope of serviceable condition inclination angle, can judge that the tested device steel construction is in not serviceable condition, show the warning of record alarm module.

[description of drawings]

Fig. 1 is the structural representation of steel construction of the present invention inclination angle diagnostic device;

Fig. 2 is the coordinate system synoptic diagram;

Fig. 3 is tested device tower crane serviceable condition inclination angle characteristic model.

[embodiment]

The invention will be further described below in conjunction with drawings and embodiments.

The tested device of embodiment of the invention steel construction inclination angle diagnostic device is take tower crane as example.

As shown in Figure 1, be steel construction of the present invention inclination angle diagnostic device, it is installed on the arbitrary main limb 2 of tower crane rotation body of the tower.The cross section of main limb 2 is quadrilateral.

This steel construction inclination angle diagnostic device comprises that anchor ear 1, a pair of fixed leg 3, an obliquity sensor 4 and show record warning device 6.

This anchor ear 1 is used for waling main limb 2.It comprises the V-arrangement interlude of waling main limb 2 adjacent dual-sides, with the left hand edge section that links to each other with the V-arrangement interlude and right hand edge section.Be equipped with threaded hole at left and right edge section.

In embodiments of the present invention, a pair of fixed leg 3 is bolt, and it passes respectively the threaded hole on the left and right edge section, links to each other with anchor ear 1 two ends screw thread.

Obliquity sensor 4 is provided with a V-arrangement bayonet socket 5, and it is connected on the main limb 2 by V-arrangement bayonet socket 5.And the two ends of obliquity sensor 4 and a pair of fixed leg 3 are fixedly linked.

Show that record warning device 6 is electrical connected by cable 7 with obliquity sensor 4.Show that record warning device 6 is installed in the cab of tower crane, is convenient to driver's real time inspection tower crane and whether is in serviceable condition.

The present invention utilizes the steel construction inclination angle diagnostic device diagnosis tower crane of said structure whether to be in serviceable condition, and diagnostic method comprises:

A, provide a kind of steel construction inclination angle diagnostic device of said structure;

B, above-mentioned steel construction inclination angle diagnostic device is installed on the main limb 2 of tower crane rotation body of the tower, the V-arrangement interlude of anchor ear 1 is waled the adjacent dual-side of main limb 2, the in addition adjacent dual-side engaging of the V-arrangement bayonet socket of obliquity sensor 4 and main limb 2 links to each other, and bolt is fixedly linked with left and right edge section and the obliquity sensor of anchor ear again;

C, steel construction inclination angle diagnostic device are determined the inclination angle characteristic model of tower crane under serviceable condition by gathering the inclination data under tower crane zero load and the rated load state;

D, the angle of inclination of the tower crane that obtains and the inclination angle characteristic model under the serviceable condition are compared, if the angle of inclination is within this inclination angle characteristic model scope, but then steel structure for tower crane is in serviceable condition; If the angle of inclination is in outside this inclination angle characteristic model scope, can judge that then steel structure for tower crane is in not serviceable condition, show the warning of record warning device.

Principle of work of the present invention:

Tower crane is in stressed constant situation, and when 360 ° gyration is carried out in top under slew gear drives, body of the tower top load will support with slew gear and do 360 ° of rotations.For this reason, set two coordinate systems, as shown in Figure 1, coordinate origin O be body of the tower at the central point of ground constant cross-section, coordinate axis x positive dirction is the ground north orientation, coordinate axis y positive dirction be the west, ground to, coordinate axis z positive dirction is perpendicular to ground facing up; Another coordinate origin O ' is that body of the tower top pivoting support is connected the kernel of section point with slewing tower, coordinate axis x ' positive dirction is that the lifting beam axis is away from the body of the tower direction, coordinate axis z ' positive dirction is perpendicular to ground facing up, and coordinate axis y ' positive dirction is for to meet right-hand rule perpendicular to lifting beam axis and x ', z ' axle.

1, tower crane is when normal operation, and load is on lifting beam-balance arm direction, and the tower crane ground is installed the judgement of stability formula among the GB/T13752:

$\frac{M+F_h\×h}{F_V+F_g}\≤\frac{b}{3}---\left(1\right)$

Wherein:

F _VBe the conduct oneself with dignity normal pressure in sensing the earth's core that relative ground produces of part more than the tower crane foundation;

F _gDeadweight for ground;

F _hBe the outer horizontal forces such as wind load;

H is the thickness of ground,

B is the width of ground,

M is that relative body of the tower top, tower crane top produces eccentric bending moment.

: $M\≤\frac{b}{3}(F_V+F_g)-F_h\×h$

This shows that stabilizing moment can not be infinitely great when normal operating conditions for tower crane, every kind of model tower crane has its specific maximal value.And then the tower crane that can draw every kind of model is in working order the time, along inclination angle value maximum on lifting beam-balance arm direction:

${\mathrm{\θ}}^{\′}=\frac{\mathrm{ML}}{\mathrm{EI}}\≤\frac{\frac{b}{3}(F_V+F_g)-F_h\×h}{\mathrm{EI}}L={\mathrm{\θ}}_0$

L is the stacker crane body height, and E is the elastic modulus of body of the tower, and I is the moment of inertia of body of the tower.

2, tower crane is under off working state, and on lifting beam-balance arm direction, the moment of flexure that body of the tower is subject to mainly comes from damper weight.Get relative body of the tower top, tower crane top according to formula (1) and produce eccentric bending moment

$M_1\≤\frac{b}{3}(F_{V1}+F_g)-F_h\×h$

F _V1Be the conduct oneself with dignity normal pressure in sensing the earth's core that relative ground produces of part more than the tower crane foundation;

This shows that tower crane along lifting beam-balance arm direction inclination maximum is when off working state:

${\mathrm{\θ}}^{\text{'}}=\frac{M_{1}L}{\mathrm{EI}}\≤\frac{\frac{b}{3}(F_{V1}+F_g)-F_h\×h}{\mathrm{EI}}L={\mathrm{\θ}}_1.$

Can draw, along body of the tower top change of pitch angle scope on lifting beam-balance arm direction be: [θ ₁, θ ₀].

3, on the direction perpendicular to lifting beam-balance arm, the moment of flexure that body of the tower is subject to is far smaller than the moment of flexure of lifting beam-balance arm direction, the body of the tower top change of pitch angle scope [θ of this direction ₃, θ ₂] be far smaller than lifting beam-balance arm direction top rade variation range [θ ₁, θ ₀].

In sum, inclination angle, the body of the tower top scope under the tower crane serviceable condition is a long L _θ=θ ₀-θ ₁, wide L _{θ '}=θ ₂-θ ₃Rectangle, this rectangle only with body of the tower characteristic (E, I), load (F _V, F _g, F _h), physical dimension (L, b) is relevant.As shown in Figure 2, this model is a kind of succinct refinement to inclination angle, body of the tower top feature under the tower crane serviceable condition, provide a kind of basis for estimation for the stacker crane body steel construction is intact with the diagnosis of serviceable condition not, be specially: when inclination angle, body of the tower top is in the rectangular extent, can judge that tower body steel structure is in serviceable condition; When the body of the tower inclination angle is in outside the rectangular extent, can judge that tower body steel structure is in not serviceable condition.

When steel construction of the present invention inclination angle diagnostic device is worked, obliquity sensor 4 is owing to connect firmly with tower crane master limb 2, so when the body of the tower run-off the straight, obliquity sensor 4 can obtain relevant information, this information exchange is crossed cable 7 and is delivered to demonstration record alarm module 6, show that recording alarm module 6 processes obliquity sensor 4 signals measured and that pass over, then calculate the angle of inclination of this main limb 2, and with inclination angle, tower crane serviceable condition body of the tower top characteristic model relatively, if inclination angle, body of the tower top is within the characteristic model scope of inclination angle, serviceable condition body of the tower top, can judge that then the stacker crane body steel construction is in serviceable condition; If inclination angle, body of the tower top is in outside the characteristic model scope of inclination angle, serviceable condition body of the tower top, can judge that the stacker crane body steel construction is in not serviceable condition demonstration record alarm module 6 warnings.

Above-described only is embodiments of the present invention, should be pointed out that for the person of ordinary skill of the art at this, under the prerequisite that does not break away from the invention design, can also make improvement, but these all belongs to protection scope of the present invention.

Claims (4)

1. steel construction inclination angle diagnostic device, it is characterized in that: described steel construction inclination angle diagnostic device comprises a pair of fixed leg that links to each other respectively be used to the anchor ear of waling tested device, with the anchor ear two ends, the obliquity sensor that links to each other with a pair of fixed leg other end and the demonstration record warning device that is electrical connected with obliquity sensor, and described obliquity sensor is provided be used to the bayonet socket that is fastened on the tested device.

2. steel construction according to claim 1 inclination angle diagnostic device, it is characterized in that: described anchor ear comprises be used to the V-arrangement interlude of waling tested device and the left hand edge section that links to each other with the V-arrangement interlude and right hand edge section, be equipped with threaded hole on the described left and right edge section, described fixed leg is bolt, and described bolt cooperates with threaded hole and links to each other.

3. steel construction according to claim 1 inclination angle diagnostic device, it is characterized in that: described bayonet socket is V-arrangement.

4. the diagnostic method of a steel structure sound condition, it is characterized in that: the method comprises:

A, provide a kind of steel construction as claimed in claim 1 inclination angle diagnostic device;

B, above-mentioned steel construction inclination angle diagnostic device is installed on the main limb of tested device;

C, steel construction inclination angle diagnostic device are determined the inclination angle characteristic model of tested device under serviceable condition by gathering the inclination data under tested device zero load and the rated load state;

D, the angle of inclination of the tested device that obtains and the inclination angle characteristic model under the serviceable condition are compared, if the angle of inclination is within this inclination angle characteristic model scope, can judge that then the tested device steel construction is in serviceable condition; If the angle of inclination is in outside this inclination angle characteristic model scope, can judge that then the tested device steel construction is in not serviceable condition, show the warning of record warning device.

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