CN102381645A - Method for correcting rated lifting capacities of tower cranes in wind state - Google Patents

Abstract

The invention relates to a method for correcting the rated lifting capacities of tower cranes in wind state. Compared with various existing limiters and tower crane black boxes, the method provided by the invention is used for measuring dip angles at top ends of tower body center lines of the tower cranes in wind state by utilizing a dip angle measurement device and then correcting the rated lifting capacities of the tower cranes in wind state according to dip angle modules at the top ends of the tower body center lines of the tower cranes, so that the rated lifting capacities of the tower cranes in wind state are corrected in real time and the construction safety of the tower cranes is ensured.

Description

A kind of modification method to tower machine specified load-carrying ability when the wind state is arranged

Technical field

The present invention relates to a kind of modification method, belong to construction machinery and equipment safety monitoring technology field tower machine specified load-carrying ability when the wind state is arranged.

Background technology

Along with developing rapidly of building industry, the application of tower machine also more and more widely.Because the structure of tower machine is huge, work under bad environment is born live load in addition when working, and these factors threaten all for the trouble free service of tower machine and tower machine operation personnel's life security.Regulation tower machine must possess safety guard in the national standard for this reason; Though various killers have been applied on the tower machine; And played the certain protection effect; But traditional killer such as weight limits device, limiter of moment all are that this method is not considered the influence of wind load to tower machine safety, has certain one-sidedness with the actual standard of the state of carrying as tower machine safety of hanging of tower machine.As a kind of safety device, should be able to consider the various factors that tower machine safety is impacted comprehensively, comprise lift heavy, amplitude under the mode of operation, also comprise environmental factor, like the differential settlement of wind load, ground, bolt looseness etc.For example; The black box of often using on the tower machine; Its principle of work be through gathering amplitude variation trolley range value with hang the gravimetric value that carries and obtain current moment values; Through more current moment values whether overrate judge that overload implements to control, the shortcoming of this control method is: when environmental factor caused significant impact to tower machine safety, excessive or ground generation differential settlement had increased the front rake of body of the tower like wind load; If also still carry out safety control, cause tower machine safety misadventure easily according to rated moment.

Summary of the invention

To the deficiency of prior art, the present invention provides a kind of modification method to tower machine specified load-carrying ability when the wind state is arranged.

Summary of the invention:

With different being of method that guaranteed tower machine safety through restraining moment in the past; A kind of modification method to tower machine specified load-carrying ability when the wind state is arranged according to the invention is the method that guarantees to hang under the wind state tower machine safety when carrying through inclination angle, real-time measurement tower machine body of the tower line of centers top: at first set up inclination angle, tower machine body of the tower line of centers top model under the tower machine serviceable condition, coming to revise the tower machine in real time according to the position of inclination angle, monitoring tower machine body of the tower line of centers top in the model of inclination angle, tower machine body of the tower line of centers top is in real time having the specified load-carrying ability under the wind state.

Terminological interpretation:

Tower machine serviceable condition: the i.e. tower machine of National standard and acceptance(check).

Detailed Description Of The Invention:

A kind of modification method to tower machine specified load-carrying ability when the wind state is arranged, method is following:

1) set up inclination angle, tower machine body of the tower line of centers top model:

A. set up model coordinate systems

With O is coordinate origin; Wherein O is the intersection point of body of the tower plane of rotation and body of the tower center vertical line; Said body of the tower plane of rotation is a body of the tower pivoting support plane of rotation; Described body of the tower center vertical line be with perpendicular to ground and cross the straight line of body of the tower center-point of constant cross-section on ground, coordinate axle x positive dirction is that crane arm is when being parallel to ground, away from the body of the tower direction; Coordinate axle z positive dirction is for to make progress perpendicular to ground, and coordinate axle y positive dirction is for to meet the right-handed helix rule perpendicular to the crane arm axis direction and with x, z axle;

2) in model coordinate systems xyz, set up inclination angle, tower machine body of the tower line of centers top model:

Utilize dip measuring device (like Chinese patent CN 201177499 described dip measuring devices) to measure inclination angle, tower machine body of the tower line of centers top; Dip measuring device is installed on the arbitrary main limb of slewing tower under the tower machine serviceable condition; After the tower machine returns three-sixth turn when unloaded, body of the tower line of centers top inclination data set when gathering the zero load of tower machine:

(θ _kxi，θ _kyi)(i＝1-n ₁)

, the unloaded center point coordinate of tower machine: ${\mathrm{\&theta;}}_x=\frac{\underset{i=1}{\overset{{\mathrm{<figure-callout\; id="1"\; label="n"\; filenames="HDA0000091577830000011.png"\; state="\{\{state\}\}">n</figure-callout>}}_1}{\mathrm{\&Sigma;}}}{\mathrm{\&theta;}}_{\mathrm{Kxi}}}{{\mathrm{<figure-callout\; id="1"\; label="n"\; filenames="HDA0000091577830000011.png"\; state="\{\{state\}\}">n</figure-callout>}}_1}$ ${\mathrm{\&theta;}}_y=\frac{\underset{i=1}{\overset{{\mathrm{<figure-callout\; id="1"\; label="n"\; filenames="HDA0000091577830000011.png"\; state="\{\{state\}\}">n</figure-callout>}}_1}{\mathrm{\&Sigma;}}}{\mathrm{\&theta;}}_{\mathrm{Kyi}}}{{\mathrm{<figure-callout\; id="1"\; label="n"\; filenames="HDA0000091577830000011.png"\; state="\{\{state\}\}">n</figure-callout>}}_1};$

In like manner, after tower machine volume returns three-sixth turn when carrying, body of the tower line of centers top inclination data set when collection tower machine volume carries: (θ _Lxj, θ _Lyj) (j=1-n ₂)

, tower machine volume carries center point coordinate: ${\mathrm{\&theta;}}_x=\frac{\underset{j=1}{\overset{{\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="HDA0000091577830000011.png"\; state="\{\{state\}\}">n</figure-callout>}}_2}{\mathrm{\&Sigma;}}}{\mathrm{\&theta;}}_{\mathrm{<figure-callout\; id="2"\; label="Lxj\; n"\; filenames="HDA0000091577830000011.png"\; state="\{\{state\}\}">Lxj</figure-callout>}}}{n_{}}$ ${\mathrm{\&theta;}}_y=\frac{\underset{j=1}{\overset{{\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="HDA0000091577830000011.png"\; state="\{\{state\}\}">n</figure-callout>}}_2}{\mathrm{\&Sigma;}}}{\mathrm{\&theta;}}_{\mathrm{Lyj}}}{{\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="HDA0000091577830000011.png"\; state="\{\{state\}\}">n</figure-callout>}}_2};$

Inclination angle, tower machine body of the tower line of centers top model is a long L _θ=sub (max (θ _Kxi), max (θ _Lxj)) K _x, wide L _{θ '}=sub (max (θ _Kyi), max (θ _Lyj)) K _yRectangle, wherein, K _x, K _yFor the adjustment coefficient, set K according to safety requirements _xSpan be 0.8～5, K _ySpan be 0.8～5.The cooresponding load-carrying ability of said rectangle is revised specified load-carrying ability;

3) coming in real time according to the position of inclination angle, the real-time monitoring tower machine of dip measuring device body of the tower line of centers top in the model of inclination angle, tower machine body of the tower line of centers top, correction tower machine is having the specified load-carrying ability under the wind state:

If the inclination angle, top of tower machine body of the tower line of centers is in the model scope of inclination angle, tower machine body of the tower line of centers top, then current heavy lift of tower machine in the specified load-carrying ability scope, judged tower machine work safety after correction;

When if the inclination angle, top of tower machine body of the tower line of centers reaches inclination angle, tower machine body of the tower line of centers top model boundary, then current heavy lift of tower machine reaches and revises the specified load-carrying ability scope in back, judges that the tower machine is in the hole, quits work immediately;

When if the inclination angle, top of tower machine body of the tower line of centers exceeds inclination angle, tower machine body of the tower line of centers top model scope, then current heavy lift of tower machine exceeds the specified load-carrying ability scope in back of revising, and judgement tower machine is in the hole, quits work immediately.

Beneficial effect of the present invention:

The present invention comes to revise the tower machine in real time according to the position of inclination angle, the real-time monitoring tower machine of dip measuring device body of the tower line of centers top in the model of inclination angle, tower machine body of the tower line of centers top is having the specified load-carrying ability under the wind state; To have avoided existing tower machine safety device be standard with the nominal parameter, do not consider that environmental factor causes the defective of safety misadventure; Guaranteed to have the tower machine construction safety under the wind state.

Description of drawings

Inclination angle, tower machine body of the tower line of centers top model under Fig. 1 tower machine serviceable condition;

Wherein, 1, the unloaded center-point of tower machine, 2, tower machine volume carries center-point.

The specific embodiment

Below in conjunction with embodiment and Figure of description the present invention is done detailed explanation, but be not limited thereto.

Embodiment

A kind of modification method to tower machine specified load-carrying ability when the wind state is arranged, method is following:

1) set up inclination angle, tower machine body of the tower line of centers top model:

A. set up model coordinate systems

With O is coordinate origin; Wherein O is the intersection point of body of the tower plane of rotation and body of the tower center vertical line; Said body of the tower plane of rotation is a body of the tower pivoting support plane of rotation; Described body of the tower center vertical line be with perpendicular to ground and cross the straight line of body of the tower center-point of constant cross-section on ground, coordinate axle x positive dirction is that crane arm is when being parallel to ground, away from the body of the tower direction; Coordinate axle z positive dirction is for to make progress perpendicular to ground, and coordinate axle y positive dirction is for to meet the right-handed helix rule perpendicular to the crane arm axis direction and with x, z axle;

2) in model coordinate systems xyz, set up inclination angle, tower machine body of the tower line of centers top model:

Utilize dip measuring device (like Chinese patent CN 201177499 described dip measuring devices) to measure inclination angle, tower machine body of the tower line of centers top; Dip measuring device is installed on the arbitrary main limb of slewing tower under the tower machine serviceable condition; After the tower machine returns three-sixth turn when unloaded, body of the tower line of centers top inclination data set when gathering the zero load of tower machine:

(θ _kxi，θ _kyi)(i＝1-n ₁)

, the unloaded center point coordinate of tower machine: ${\mathrm{\&theta;}}_x=\frac{\underset{i=1}{\overset{{\mathrm{<figure-callout\; id="1"\; label="n"\; filenames="HDA0000091577830000011.png"\; state="\{\{state\}\}">n</figure-callout>}}_1}{\mathrm{\&Sigma;}}}{\mathrm{\&theta;}}_{\mathrm{Kxi}}}{{\mathrm{<figure-callout\; id="1"\; label="n"\; filenames="HDA0000091577830000011.png"\; state="\{\{state\}\}">n</figure-callout>}}_1}$ ${\mathrm{\&theta;}}_y=\frac{\underset{i=1}{\overset{{\mathrm{<figure-callout\; id="1"\; label="n"\; filenames="HDA0000091577830000011.png"\; state="\{\{state\}\}">n</figure-callout>}}_1}{\mathrm{\&Sigma;}}}{\mathrm{\&theta;}}_{\mathrm{Kyi}}}{{\mathrm{<figure-callout\; id="1"\; label="n"\; filenames="HDA0000091577830000011.png"\; state="\{\{state\}\}">n</figure-callout>}}_1};$

In like manner, after tower machine volume returns three-sixth turn when carrying, body of the tower line of centers top inclination data set when collection tower machine volume carries: (θ _Lxj, θ _Lyj) (j=1-n ₂)

, tower machine volume carries center point coordinate: ${\mathrm{\&theta;}}_x=\frac{\underset{j=1}{\overset{{\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="HDA0000091577830000011.png"\; state="\{\{state\}\}">n</figure-callout>}}_2}{\mathrm{\&Sigma;}}}{\mathrm{\&theta;}}_{\mathrm{<figure-callout\; id="2"\; label="Lxj\; n"\; filenames="HDA0000091577830000011.png"\; state="\{\{state\}\}">Lxj</figure-callout>}}}{n_{}}$ ${\mathrm{\&theta;}}_y=\frac{\underset{j=1}{\overset{{\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="HDA0000091577830000011.png"\; state="\{\{state\}\}">n</figure-callout>}}_2}{\mathrm{\&Sigma;}}}{\mathrm{\&theta;}}_{\mathrm{Lyj}}}{{\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="HDA0000091577830000011.png"\; state="\{\{state\}\}">n</figure-callout>}}_2};$

In Fig. 1: inclination angle, tower machine body of the tower line of centers top model is a long L _θ=sub (max (θ _Kxi), max (θ _Lxj)) K _x, wide L _{θ '}=sub (max (θ _Kyi), max (θ _Lyj)) K _yRectangle, wherein, K _x, K _yFor the adjustment coefficient, set K according to safety requirements _xValue be 1.1, K _yValue be 1.1, the cooresponding load-carrying ability of this rectangle is revised specified load-carrying ability.

3) coming in real time according to the position of inclination angle, the real-time monitoring tower machine of dip measuring device body of the tower line of centers top in the model of inclination angle, tower machine body of the tower line of centers top, correction tower machine is having the specified load-carrying ability under the wind state:

If the inclination angle, top of tower machine body of the tower line of centers is in the model scope of inclination angle, tower machine body of the tower line of centers top, then current heavy lift of tower machine in the specified load-carrying ability scope, judged tower machine work safety after correction;

When if the inclination angle, top of tower machine body of the tower line of centers reaches inclination angle, tower machine body of the tower line of centers top model boundary, then current heavy lift of tower machine reaches and revises the specified load-carrying ability scope in back, judges that the tower machine is in the hole, quits work immediately;

When if the inclination angle, top of tower machine body of the tower line of centers exceeds inclination angle, tower machine body of the tower line of centers top model scope, then current heavy lift of tower machine exceeds the specified load-carrying ability scope in back of revising, and judgement tower machine is in the hole, quits work immediately.

Claims (2)

1. modification method to tower machine specified load-carrying ability when the wind state is arranged is characterized in that method is following:

Coming in real time according to the position of inclination angle, the real-time monitoring tower machine of dip measuring device body of the tower line of centers top in the model of inclination angle, tower machine body of the tower line of centers top, correction tower machine is having the specified load-carrying ability under the wind state:

If the inclination angle, top of tower machine body of the tower line of centers is in the model scope of inclination angle, tower machine body of the tower line of centers top, then current heavy lift of tower machine in the specified load-carrying ability scope, judged tower machine work safety after correction;

When if the inclination angle, top of tower machine body of the tower line of centers reaches inclination angle, tower machine body of the tower line of centers top model boundary, then current heavy lift of tower machine reaches and revises the specified load-carrying ability scope in back, judges that the tower machine is in the hole, quits work immediately;

When if the inclination angle, top of tower machine body of the tower line of centers exceeds inclination angle, tower machine body of the tower line of centers top model scope, then current heavy lift of tower machine exceeds the specified load-carrying ability scope in back of revising, and judgement tower machine is in the hole, quits work immediately.

2. the modification method of tower machine according to claim 1 specified load-carrying ability when the wind state is arranged is characterized in that, definite step of inclination angle, described tower machine body of the tower line of centers top model is following:

1) set up inclination angle, tower machine body of the tower line of centers top model:

A. set up model coordinate systems

With O is coordinate origin; Wherein O is the intersection point of body of the tower plane of rotation and body of the tower center vertical line; Said body of the tower plane of rotation is a body of the tower pivoting support plane of rotation; Described body of the tower center vertical line be with perpendicular to ground and cross the straight line of body of the tower center-point of constant cross-section on ground, coordinate axle x positive dirction is that crane arm is when being parallel to ground, away from the body of the tower direction; Coordinate axle z positive dirction is for to make progress perpendicular to ground, and coordinate axle y positive dirction is for to meet the right-handed helix rule perpendicular to the crane arm axis direction and with x, z axle;

2) in model coordinate systems xyz, set up inclination angle, tower machine body of the tower line of centers top model:

Utilize dip measuring device to measure inclination angle, tower machine body of the tower line of centers top; Dip measuring device is installed on the arbitrary main limb of slewing tower under the tower machine serviceable condition; After the tower machine returns three-sixth turn when unloaded, body of the tower line of centers top inclination data set when gathering the zero load of tower machine:

(θ _kxi，θ _kyi)(i＝1-n ₁)

, the unloaded center point coordinate of tower machine: ${\mathrm{\&theta;}}_x=\frac{\underset{i=1}{\overset{n_1}{\mathrm{\&Sigma;}}}{\mathrm{\&theta;}}_{\mathrm{Kxi}}}{n_1}$ ${\mathrm{\&theta;}}_y=\frac{\underset{i=1}{\overset{n_1}{\mathrm{\&Sigma;}}}{\mathrm{\&theta;}}_{\mathrm{Kyi}}}{n_1};$

In like manner, after tower machine volume returns three-sixth turn when carrying, body of the tower line of centers top inclination data set when collection tower machine volume carries: (θ _Lxj, θ _Lyj) (j=1-n ₂)

, tower machine volume carries center point coordinate: ${\mathrm{\&theta;}}_x=\frac{\underset{j=1}{\overset{n_2}{\mathrm{\&Sigma;}}}{\mathrm{\&theta;}}_{\mathrm{Lxj}}}{n_2}$ ${\mathrm{\&theta;}}_y=\frac{\underset{j=1}{\overset{n_2}{\mathrm{\&Sigma;}}}{\mathrm{\&theta;}}_{\mathrm{Lyj}}}{n_2};$

Inclination angle, tower machine body of the tower line of centers top model is a long L _θ=sub (max (θ _Kxi), max (θ _Lxj)) K _x, wide L _{θ '}=sub (max (θ _Kyi), max (θ _Lyj)) K _yRectangle, wherein, K _x, K _yFor the adjustment coefficient, set K according to safety requirements _xSpan be 0.8～5, K _ySpan be 0.8～5.

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