阅读说明：本技术 显示实时吊钩偏角防斜吊防摇监控装置及起重机 (Real-time display monitoring device for preventing deviation angle of lifting hook from being inclined and shaking and crane ) 是由 林汉丁 胡立明 于 2020-12-08 设计创作，主要内容包括：本发明涉及一种显示实时吊钩偏角防斜吊防摇监控装置及起重机,其特点是：检测显示吊钩偏角：将起重机定滑轮组件a1经联接件a3用卸扣a5吊挂于吊臂b1的吊耳b2上,所述联接件a3另一端用绞接轴a2同所述定滑轮组件a1联接,并将绞接轴a2设在与定滑轮轴线相垂直方位,在所述联接件a3装设角度测量仪a7,并将所述角度测量仪与起重机控制器联接；依精确检测的实时吊钩偏角对中起吊实现垂直吊装或监控斜吊或用双脉冲前馈消除停车时所形成的摇摆。(The invention relates to an anti-oblique-hanging and anti-swing monitoring device capable of displaying real-time hook deflection angle and a crane, which are characterized in that: detecting and displaying a hook deflection angle: hanging a crane fixed pulley assembly a1 on a lifting lug b2 of a lifting arm b1 by using a shackle a5 through a connecting piece a3, connecting the other end of the connecting piece a3 with the fixed pulley assembly a1 by using a hinge shaft a2, arranging the hinge shaft a2 in a vertical direction to the axis of the fixed pulley, arranging an angle measuring instrument a7 on the connecting piece a3, and connecting the angle measuring instrument with a crane controller; and (3) realizing vertical hoisting or monitoring inclined hoisting by centering hoisting according to the accurately detected real-time deviation angle of the lifting hook or eliminating swing formed during parking by using double-pulse feedforward.)

1. The utility model provides a show real-time lifting hook declination and prevent hanging to one side anti-swing monitoring device which characterized by:

(1) detecting and displaying a hook deflection angle: hanging a crane fixed pulley assembly a1 on a lifting lug b2 of a lifting arm b1 by using a shackle a5 through a connecting piece a3, connecting the other end of the connecting piece a3 with the fixed pulley assembly a1 by using a hinge shaft a2, and arranging the hinge shaft a2 to be perpendicular to the axis of the fixed pulley; a platform surface a6 perpendicular to a force action line of the pulley block is arranged on the connecting piece a3, an angle measuring instrument a7 is arranged on the platform surface a6, the angle measuring instrument is connected with a controller arranged in a crane operation room, the detected real-time axial components X, Y are synthesized to be equal to a real-time hook deflection angle, and the real-time hook deflection angle is displayed on a display screen of the crane operation room;

(2) the hoisted object is hoisted in a centering way according to the deflection angle of the real-time hoisting hook;

(3) preventing and controlling the deflection angle of the crane hook to exceed an allowable value according to the deflection angle of the real-time hook;

(4) according to the obtained real-time lifting hook swinging angle and acceleration; at the moment when the crane hoists stop and swing back, the formed swing is eliminated by double-pulse feedforward.

2. The monitoring device for displaying the deflection angle of the lifting hook in real time for preventing the inclined lifting and the shaking of the lifting hook according to claim 1, wherein the vertical lifting is realized during the slow or extremely slow lifting of the crane and the centering of the crane are alternately carried out according to the deflection angle and the direction of the lifting hook which are accurately detected and displayed in real time.

3. The monitoring device for displaying the deviation angle of the real-time lifting hook to prevent the inclined lifting and the shaking of the lifting hook according to the claim 1 or 2 is characterized in that the corresponding rotary handle is firstly controlled to be centered according to the deviation angle direction of the lifting hook displayed in real time, so that the rotary table rotates the lifting arm to the deviation angle direction of the real-time lifting hook, and then the corresponding lifting arm pitching handle is controlled to be centered according to the deviation angle of the lifting hook displayed in real time, so that the deviation angle of the real-time lifting hook is 0.

4. The monitoring device for displaying real-time lifting hook deflection angle anti-tilting and anti-shaking of the lifting hook according to claim 1 or 2, wherein the real-time lifting hook deflection angle and direction are aligned: the method comprises the following steps: s1, the controller acquires the deflection angle and the direction of the crane hook in real time; s2 revolving centering of the turntable: s21, detecting the deflection angle direction of the real-time lifting hook, S22 judging whether the suspension arm deviates from the deflection angle direction of the real-time lifting hook, if so, entering the step S23, otherwise, entering the step S21, and enabling the turntable to rotate the suspension arm to the deflection angle direction of the real-time lifting hook in the step S23; s3 boom pitch centering: s31, detecting a deflection angle of the real-time lifting hook, S32 judging whether the absolute value of the deflection angle of the real-time lifting hook is greater than 0 degrees, if yes, entering a step S33, if not, entering a step S31, and enabling the deflection angle of the real-time lifting hook to be 0 degrees in the step S33.

5. The monitoring device for displaying the deviation angle of the real-time lifting hook to prevent the inclined lifting and the shaking of the lifting hook according to the claim 1 or 2 is characterized in that corresponding cart handles are controlled to be centered according to the deviation angle direction of the real-time displayed lifting hook to enable a cart to walk on a trolley to be aligned with the deviation angle direction of the real-time lifting hook, and then corresponding trolley handles are controlled to be centered according to the deviation angle of the real-time displayed lifting hook to enable the trolley to walk to the deviation angle of the real-time lifting hook of 0 degree.

6. The monitoring device for displaying real-time lifting hook deflection angle anti-tilting and anti-shaking of the lifting hook according to claim 1 or 2, wherein the real-time lifting hook deflection angle and direction are aligned: the method comprises the following steps: s1, the controller acquires the deflection angle and the direction of the crane hook in real time; s2 centering the cart during walking: s21, detecting the deflection angle direction of the real-time lifting hook, S22 judging whether the trolley deviates from the deflection angle direction of the real-time lifting hook, if so, entering the step S23, otherwise, entering the step S21, and enabling the trolley walking on the cart to align to the deflection angle direction of the real-time lifting hook in the step S23; s3 trolley walking centering: s31, detecting a deflection angle of the real-time lifting hook, S32 judging whether the absolute value of the deflection angle of the real-time lifting hook is greater than 0 degrees, if yes, entering a step S33, if not, entering a step S31, and enabling the trolley to travel to the deflection angle of the real-time lifting hook of 0 degrees in a step S33.

7. The monitoring device for displaying real-time hook deflection angle and preventing inclined crane from shaking as claimed in claim 1, wherein the crane hook deflection angle is prevented from exceeding an allowable value during the hoisting process according to the precisely detected and real-time displayed hook deflection angle and direction.

8. The monitoring device for displaying real-time hook drift angle anti-tilting and anti-shaking of the lifting hook as claimed in claim 7, wherein the monitoring device alarms when the horizontal offset from the lifting hook at the lifting height of the crane reaches an early warning value.

9. The monitoring device for displaying real-time hook drift angle anti-sway and anti-sway of claim 7, wherein an alarm is given when the crane sway increase moment reaches an early warning value; the lifting is stopped or the movement in the large amplitude direction is stopped when the rated lifting moment is exceeded.

10. The device for displaying the deviation angle of the real-time lifting hook to prevent the deviation of the lifting hook from being hung and the shaking of the lifting hook according to the claim 1 is characterized in that an inertial sensor arranged on a movable pulley guard plate is wirelessly connected with a controller arranged in a crane operation chamber to obtain the real-time swinging angle and the acceleration of the lifting hook in the moving direction of the lifted object of the crane, the controller is started to control the crane to move continuously in the moving direction and the acceleration at the moment of the lifted object of the crane stopping until the swinging angle of the lifting hook of the crane is reduced to 0 degree.

11. A crane is characterized by comprising the monitoring device for displaying the real-time lifting hook deflection angle, preventing inclined lifting and preventing shaking, which is used for displaying the real-time lifting hook deflection angle, and is described in any one of the above 1 to 10.

Technical Field

The invention discloses an anti-oblique-hanging and anti-swing monitoring device capable of displaying a real-time lifting hook deflection angle and a crane, belongs to the technical field of cranes, and further relates to a crane comprising the anti-oblique-hanging and anti-swing monitoring device capable of displaying the real-time lifting hook deflection angle.

Background

According to the latest SH/T3515-2017 petrochemical engineering hoisting engineering construction technical regulation 11.1.4, the deflection angle of a lifting hook is less than 1 degree in the hoisting process.

In the process of hoisting operation of the crane, the hook following and stabilizing operation is to move the car to the direction of swinging of the lifting hook at the moment that a hoisted object swings to the maximum amplitude but does not swing back, so that the lifting hook is subjected to opposite force at the moment of swinging back, and the force of swinging back is counteracted, and the aim of eliminating swinging is fulfilled; and the lifting hook swing phenomenon can increase the operation degree of difficulty, reduce and transport efficiency, and the crane driver stadia constantly increases, and with the hook operation more and more difficult, greatly influenced production efficiency to the potential safety hazard has been caused.

The monitoring of the deflection angle of a lifting hook in vertical hoisting and hoisting is the basic requirement of the safety operation of a crane, however, the crane driver

The machine can not judge whether the lifting hook is in a vertical state or not in the hoisting process, and can not know that the force action line of the pulley block deviates from a plumb line

In any state, no matter what the force line of the prevention and control pulley block deviates from the plumb line, or in order to realize the plumb

The vertical hoisting is a problem that the crane needs to be improved urgently.

The traditional crane electronic anti-swing is a typical open-loop system, the anti-swing is a situation that an initial hook is static, and the actual working condition is that the hook mostly starts to swing before the crane accelerates or decelerates, so that the open-loop electronic anti-swing is difficult to perform.

Disclosure of Invention

The invention provides an anti-sway and anti-shake monitoring device based on accurate display of a real-time lifting hook deflection angle, and also aims to provide a crane comprising the anti-sway and anti-shake monitoring device for displaying the real-time lifting hook deflection angle.

Why the real time hook drift angle is to be displayed accurately: the deflection angle of the lifting hook is an angle of a force action line acting on a lifting hook (a force action point) of a crane pulley block deviating from a plumb line (a force action direction), and is a large element of a force action effect, according to the latest technical specification of large equipment lifting, the deflection angle of the lifting hook is smaller than 1 degree, a tower crane (a tower crane, the same below) is taken as an example, the lifting height of the tower crane is set to be 40m, when the deflection angle of the lifting hook is 3 degrees, the horizontal offset between the lifting height of the tower crane and the lifting hook reaches 2m at the moment when a lifted object is just lifted, and the lifting height of the mobile crane and the ultra-large tower crane can be increased by times if the tower crane swings back and forth after lifting; meanwhile, when a heavy object is hoisted, an overturning moment caused by a horizontal component of a hoisting weight acting on a hoisting height part (the top end of a suspension arm or a movable arm) is caused by an inclined hoisting angle (a hoisting hook deflection angle, the same applies below), and a bridge crane used for smelting, general assembly of a turbine and the like mostly needs accurate vertical hoisting, but as a crane for equipment hoisting process equipment, a hoisting hook deflection angle display is not set up so far.

The invention adopts the following technical scheme for solving the technical problems: anti-inclination display real-time lifting hook deflection angle

The hoisting anti-swing monitoring device is characterized in that as shown in figure 1:

(1) detecting and displaying a hook deflection angle: as shown in fig. 2, a crane fixed pulley assembly a1 is hung on a lifting lug b2 of a boom b1 by a shackle a5 through a connecting piece a3, the other end of the connecting piece a3 is connected with the fixed pulley assembly a1 by a hinge shaft a2, and the hinge shaft a2 is arranged in a vertical direction to the axis of the fixed pulley; a platform surface a6 perpendicular to a force action line of the pulley block is arranged on the connecting piece a3, an angle measuring instrument a7 is arranged on the platform surface a6, the angle measuring instrument is connected with a controller positioned in a crane operation room, and the detected real-time axial components X, Y are synthesized to be equal to a real-time hook deflection angle and displayed on a display screen of the crane operation room;

(2) the hoisted object is hoisted in a centering way according to the deflection angle of the real-time hoisting hook;

(3) preventing and controlling the deflection angle of the crane hook to exceed an allowable value according to the deflection angle of the real-time hook;

(4) according to the obtained real-time lifting hook swinging angle and acceleration; at the moment of the suspended object stopping and swinging back, the formed swing is eliminated by double-pulse feedforward.

Because the platform face a6 installs angle measurement appearance a7, detects real-time along X, Y axial component, and the synthetic back equals real-time lifting hook declination, and the position perpendicular to of the skew plumb line of real-time assembly pulley effort line platform face a6 and horizontal plane intersection line, the skew plumb line's of real-time assembly pulley effort line angle, with contained angle lies in the coplanar with the perpendicular platform face a6 of assembly pulley effort line between the horizontal plane in real time, so accurate detection and real-time display's lifting hook declination and direction provide the basis for lifting hook declination and direction adjustment control in the hoist and mount: the system comprises a mobile crane, a jib tower crane and the like, wherein a rotary table is centered in rotation, and a jib is centered in pitching; and bridge cranes with large and small vehicle running centers. The controller is a Programmable Logic Controller (PLC).

According to the monitoring device for displaying the deflection angle of the lifting hook in real time, the deflection angle and the direction of the lifting hook are accurately detected and displayed in real time, and vertical lifting is realized during slow or extremely slow lifting of the crane and centering of the crane alternately.

The monitoring device for displaying the real-time deviation angle of the lifting hook, preventing the inclined lifting and preventing the shaking is characterized in that firstly, according to the deviation angle direction of the lifting hook displayed in real time, a corresponding rotary handle is controlled to be centered, so that a rotary table rotates a lifting arm to the deviation angle direction of the real-time lifting hook (even if the real-time lifting arm pitching position is consistent with the real-time lifting hook deviation angle position), and then according to the real-time displayed deviation angle of the lifting hook, a corresponding lifting arm pitching handle is controlled to be centered, so that the real-time.

The display real-time lifting hook deflection angle anti-oblique lifting anti-shaking monitoring device is characterized in that the real-time lifting hook deflection angle and the direction are aligned (figure 6): the method comprises the following steps: s1, the controller acquires the deflection angle and the direction of the crane hook in real time; s2 revolving centering of the turntable: s21 detecting a real-time hook deflection angle direction, S22 judging whether the suspension arm deviates from the real-time hook deflection angle direction (namely judging whether the real-time suspension arm pitching azimuth deviates from the real-time hook deflection angle azimuth), if so, entering step S23, otherwise, entering step S21, and step S23 enabling the rotary table to rotate the suspension arm to the real-time hook deflection angle direction (even if the real-time suspension arm pitching azimuth is consistent with the real-time hook deflection angle azimuth); s3 boom pitch centering: s31 detects a real-time hook deflection angle, S32 determines whether the absolute value of the real-time hook deflection angle is greater than 0 °, if yes, then step S33 is performed, if not, then step S31 is performed, and step S33 makes the real-time hook deflection angle to 0 ° (or adjusts the real-time boom pitch to achieve the real-time hook deflection angle of 0 °). Wherein, S22 and S32 can also be preset to exceed a certain error before entering the centering procedures of S23 and S33, respectively.

The monitoring device for displaying the real-time deviation angle of the lifting hook, preventing the inclined lifting and preventing the shaking is characterized in that corresponding cart handles are controlled to be centered according to the deviation angle direction of the lifting hook displayed in real time, so that a cart travelling trolley is aligned to the deviation angle direction of the real-time lifting hook (even if the travelling direction of the cart travelling direction is consistent with the deviation angle direction of the lifting hook), and then corresponding trolley handles are controlled to be centered according to the deviation angle of the lifting hook displayed in real time, so that the trolley travels to the deviation angle of the lifting hook of 0 degree in real time.

The display real-time lifting hook deflection angle anti-oblique lifting anti-shaking monitoring device is characterized in that the real-time lifting hook deflection angle and the direction are aligned (figure 7): the method comprises the following steps: s1, the controller acquires the deflection angle and the direction of the crane hook in real time; s2 centering the cart during walking: s21 detecting the real-time hook deflection angle direction, S22 judging whether the trolley deviates from the real-time hook deflection angle direction (namely judging whether the real-time trolley walking direction deviates from the real-time hook deflection angle direction), if so, going to S23, otherwise, going to S21, and enabling the cart walking trolley to align to the real-time hook deflection angle direction (even if the real-time trolley walking direction is consistent with the real-time hook deflection angle direction) in step S23; s3 trolley walking centering: s31, detecting a deflection angle of the real-time lifting hook, S32 judging whether the absolute value of the deflection angle of the real-time lifting hook is greater than 0 degrees, if yes, entering a step S33, if not, entering a step S31, and enabling the trolley to travel to the deflection angle of the real-time lifting hook of 0 degrees in a step S33. Wherein, S22 and S32 can also be preset to exceed a certain error before entering the centering procedures of S23 and S33, respectively.

The bridge crane type of the cart walking centering and the trolley walking centering further comprises a portal crane, a container portal crane, a loading and unloading bridge, a trolley amplitude-variable tower crane and the like.

According to the monitoring device for displaying the deflection angle of the lifting hook in real time, the deflection angle of the lifting hook of the crane is prevented from exceeding an allowable value in the hoisting process according to the deflection angle and the direction of the lifting hook which are accurately detected and displayed in real time.

The non-vertical hoisting and the existence of the inertia force in the hoisting can generate the inclined hoisting deviating from a plumb line on the action line of the pulley block force, the non-vertical hoisting can cause the swinging phenomenon of a lifting hook when the constraint disappears, and the existence of the inertia force in the hoisting can cause the swinging phenomenon of the lifting hook when a hoisted object stops, and the inclined hoisting causes the overturning moment caused by the horizontal component of the hoisting weight acting on the top end of the movable arm; however, since the real-time hook drift angle can be accurately detected and displayed, advanced monitoring including early warning or restriction can be performed on the mobile crane and the ultra-large tower crane.

The real-time lifting hook deflection angle display anti-oblique lifting and anti-shaking monitoring device is characterized in that when the horizontal offset between the lifting height of the mobile crane and the ultra-large tower crane and the lifting hook reaches an early warning value, an alarm is given [ namely: and when the product of the difference between the real-time lifting height (meter) and the real-time lifting hook height (meter) multiplied by the real-time lifting hook deflection angle (degree) reaches an early warning value, alarming.

The monitoring device for displaying the deviation angle of the real-time lifting hook, preventing the inclined lifting and preventing the shaking of the mobile crane and the ultra-large tower crane, wherein when the moment of increase of the inclined lifting of the mobile crane and the ultra-large tower crane reaches an early warning value, an alarm is given (the moment of increase of the inclined lifting is equal to the tangent of the real-time lifting weight (ton) multiplied by the inclined lifting angle (degree) multiplied by the lifting height (meter)); when the rated lifting moment is exceeded, the lifting is stopped and the movement in the large-amplitude direction is stopped [ namely: and stopping lifting and stopping moving towards a large amplitude direction when the sum of the real-time hoisting weight (ton) multiplied by the real-time operation radius (meter) and the increase moment (ton meter) of the inclined hoisting exceeds the rated hoisting moment ].

There is a double-pulse feedforward cancellation (shown in fig. 9) to create a wobble, where the wobble period T =2 pi √ l/g,

t is the deceleration time, l is the rope length, g is the acceleration of gravity, when the lifting hook swings with a certain swing period (T), and when a half swing period (T/2) (the moment of swinging back), an equal pulse amount is applied, and the formed swing can be eliminated.

(as shown in fig. 8) is a prior known hook assembly which is directly connected with a hook component A2 through a choke plate A3 by a movable pulley block A1, and an inertial sensor A6 is arranged on a platform A5 of a movable pulley guard plate A4; and the inertial sensor is wirelessly connected with the controller arranged in the crane operating room.

The monitoring device for displaying the real-time hook deflection angle to prevent the oblique lifting and the shaking is characterized in that the vertical lifting is realized by centering and hoisting according to the accurately detected real-time hook deflection angle, the open-loop electronic shaking prevention is facilitated, the double-pulse feedforward shaking prevention is realized by acquiring the real-time hook swinging angle and the acceleration (mean absolute value) of the crane hook according to the controller, after the crane trolley or the crane cart stops, the crane hook swings back to the second half period moment of the first period, the moving direction controls the moving direction of the crane trolley or the crane cart according to an operation signal sent by a crane handle, and the crane trolley or the crane cart is controlled by the hook swinging angle and the acceleration acquired by the controller according to the time to continue moving towards the moving direction until the crane hook swinging angle is reduced to zero.

A crane is characterized by comprising the anti-oblique-hanging and anti-shaking monitoring device capable of displaying the real-time lifting hook deflection angle.

2, 4, a crane fixed pulley assembly a1 is hung on a lifting lug b2 of a lifting arm b1 by a shackle a5 through a connecting piece a3, the other end of the connecting piece a3 is connected with the fixed pulley assembly a1 by a hinge shaft a2, and the hinge shaft a2 is arranged in a vertical direction to the axis of the fixed pulley; therefore, when the pulley block force application point acting on the fixed pulley axis is deviated, the fixed pulley assembly a1 is self-adjusted along the hinge shaft a2 under the action of the pulley block hanging weight tension, the fixed pulley axis is slightly inclined, and the pulley block force application line is always vertical to the platform surface a6 when the pulley block force application line is hung weight because the pulley block force application line passes through the connecting piece a3 and a platform which is vertical to the platform surface a6 is fixedly arranged on the connecting piece a 3. Need to explain: the crane fixed pulley assembly a1 is hung on a lifting lug b2 of a boom b1 through a connecting piece a3, namely, lifting lugs are arranged at various fixed pulleys (a boom, an arm support, a hanging beam and the like of the existing crane), and the crane fixed pulley assembly is hung on the lifting lugs through the limited connecting piece.

Because when hanging heavy the assembly pulley effort line perpendicular to all the time the platform face, work as the connector the fixed angle measuring apparatu of installing on the platform face, the contained angle between the perpendicular platform face of detected and assembly pulley effort line and horizontal plane, is equal to numerically the real-time lifting hook declination of the skew plumb line angle of assembly pulley effort line.

As shown in fig. 5, an intersection angle between a point b passing through the pulley block force application line m and a point b passing through a plumb line n is defined as ≥ b, and a flat surface W (i.e., a6 in fig. 2) perpendicular to the pulley block force application line m is sandwiched between the flat surface W and a horizontal plane Z

The angle is < a, the perpendicular lines from the point b in the dihedral angle to the W, Z dihedral plane are C, D and cross the point C

Making a point a of Ca perpendicular to the intersection line L of the W plane and the Z plane in the plane, connecting Da ^ L ^ Ca, L ^ bC,

l < T > face bCa, < T > ba, also < T > bD, < T > face bDa, < T > Da,

the angle CaD is a plane angle of a dihedral angle, the quadrangle aCbD is coplanar with m and n straight lines, and the angle C = D =90 DEG

Therefore, the angle a (complementary to the angle CbD) is equal to the angle b of the intersection of the m straight line and the n straight line

The above shows that: real-time the angle of the skew plumb line of assembly pulley effort line equals in real time with contained angle between the perpendicular platform face of assembly pulley effort line and the horizontal plane, real-time the position perpendicular to of the skew plumb line of assembly pulley effort line the platform face intersects with the horizontal plane, just the angle of the skew plumb line of real-time assembly pulley effort line, with contained angle is located the coplanar between the perpendicular platform face of real-time and assembly pulley effort line and the horizontal plane.

An angle gauge may thus be provided on the platform surface a6 to detect the real-time hook drift angle and direction of the angle of the pulley block force line from the plumb line.

Because the deflection angle and the direction of the lifting hook can be accurately detected and displayed in real time, a crane driver can operate a corresponding handle to adjust the rotary table to rotate towards the deflection angle direction of the lifting hook according to the matching of the crane driver and adjust the elevation angle of the lifting arm, and the lifted object is lifted in a centering way (the deflection angle of the lifting hook is 0 degrees) to realize vertical lifting; therefore, the technical scheme capable of accurately displaying the deflection angle and the direction of the real-time lifting hook creates necessary conditions for the intelligent crane.

Meanwhile, the technical scheme capable of accurately displaying the deflection angle and the direction of the real-time lifting hook can provide a foundation for implementation improvement of hoisting variable-frequency speed-regulating anti-swing cranes and other anti-swing cranes.

The monitoring device for displaying real-time hook deflection angle, preventing inclined lifting and preventing shaking and the crane have the advantages that:

the invention can accurately detect and display the deflection angle and the direction of the lifting hook in real time, thereby realizing the control of the centering lifting or the centering lifting of the controller or the monitoring of the inclined lifting as the basic requirement of the safe operation of the crane, and the advanced monitoring of the early warning or restriction of the mobile crane and the ultra-large tower crane, simultaneously adopting the double-pulse feedforward to eliminate the swing formed during the parking, and creating necessary conditions for further developing intelligent crane products.

Drawings

FIG. 1 shows a schematic diagram of a real-time anti-sway and anti-sway implementation of a hook deflection angle

FIG. 2 shows an explanatory view of a hook deflection angle structure;

the numbers in fig. 2: a1 fixed pulley assembly a2 articulated axle a3 coupling a4 shackle 1 a5 shackle 2

a6 platform surface a7 angle measuring instrument;

FIG. 3 is a schematic diagram of a left side sectional structure of the embodiment of FIG. 2

FIG. 4 is a schematic view of a lifting lug of the crane boom;

reference numbers in fig. 4: b1 davit b2 shackle;

FIG. 5 is an illustration of detecting a hook deflection angle from a pulley block force line;

FIG. 6 is a flow chart of a mobile crane centering type centering process;

FIG. 7 is a flow chart of a bridge crane centering type centering process;

FIG. 8 is a schematic view of a hook assembly;

reference numbers in fig. 8: a1 movable pulley assembly A2 hook assembly A3 yoke plate A4 movable pulley guard plate A5 platform A6 inertia

A sensor;

FIG. 9 is a schematic diagram of a double pulse feedforward scheme.

Detailed Description

Anti-oblique-hanging anti-shaking scheme capable of displaying real-time lifting hook deflection angle

Firstly, detecting and displaying the deflection angle of the lifting hook

As shown in fig. 2, a crane fixed pulley assembly a1 is hung on a lifting lug b2 of a lifting arm b1 through a connecting piece a3, the other end of the connecting piece a3 is connected with the fixed pulley assembly a1 through a hinge shaft a2, and the hinge shaft a2 is arranged in a vertical direction to the axis of the fixed pulley; therefore, when the force application point of the pulley block acting on the axis of the fixed pulley deviates, the fixed pulley assembly a1 is self-adjusted along the hinge shaft a2 under the action of the tension of the pulley block hanging weight, the axis of the fixed pulley is slightly inclined, and the force application line of the pulley block is always vertical to the platform surface a6 when the pulley block is hung weight because the force application line of the pulley block passes through the connecting piece a3 and a platform which is vertical to the platform surface a6 is fixedly arranged on the connecting piece a 3.

Therefore, the correct detection of the deflection posture and the like of the hook can be carried out through the platform surface a6, and the force action line of the pulley block is always vertical to the platform surface a6 during the hoisting; when the angle measuring instrument a7 is fixedly arranged on the platform surface a6 of the connecting piece a3, the detected included angle between the vertical platform surface of the force line of the pulley block and the horizontal plane is equal to the real-time hook deflection angle.

Because the detected real-time hook deflection angle is determined by the angle of the force action line of the pulley block deviating from the plumb line, the detection is clear according to the principle and has no doubt, and an angle measuring instrument is arranged on the platform surface for detection, which belongs to the reliable prior art, so that the hook deflection angle detection scheme has reliability and feasibility.

Real-time hook deflection angle detected by double-shaft dynamic inclinometer

A BWD-VG500 dynamic measurement inclinometer (X, Y shaft dynamic accuracy is 0.1 degree) of north micro sensing (WWW. angle. com. cn) is selected, and is arranged on the connecting plate a3 and the vertical platform surface a6 of the pulley block force action line, wirelessly transmits the detected real-time X, Y axial component or transmits the axial component through a bus, and the singlechip microcomputer calculates the real-time X, Y axial component synthetic value according to the real-time hook deflection angle value, meanwhile, the force action line of the pulley block is vertical to the intersection line of the platform surface and the horizontal plane according to the real-time direction of the deviation of the force action line of the pulley block from the plumb line, and the angle of the real-time pulley block force action line deviating from the plumb line and the included angle between the real-time pulley block force action line vertical platform surface a6 and the horizontal plane are positioned on the same plane, and according to the polarity of the real-time X, Y axial component, through the matched display screen in the prior art, the real-time numerical value and the direction of the deflection angle of the lifting hook are accurately displayed in the crane operation room.

And controlling the centering hoisting or the controller to perform centering hoisting or monitoring inclined hoisting according to the deflection angle and the direction of the lifting hook which are accurately detected and displayed in real time, and performing early warning or restriction monitoring.

The crane trolley is taken as an example below to prevent the crane hook from swinging: the inertial sensor detects the swing angle and the acceleration of the crane hook in real time and sends a detection result to the controller, and when the crane trolley stops, the crane hook swings under the action of inertia; and at the moment that the crane trolley hoisted objects are stopped and swung back to the latter half period of the first period according to the moving direction, the swinging angle and the acceleration of the obtained crane trolley handle operation signal by the controller, controlling the crane trolley to continuously move towards the moving direction according to the acceleration until the swinging angle of the crane hook is reduced to zero.

It should be noted that the above-mentioned embodiments of the present invention are examples only, and that several modifications and decorations made by those skilled in the art should be considered as the protection scope of the present invention.