CN115043340A - Double-amplitude hoisting system, hoisting method and crane - Google Patents

Double-amplitude hoisting system, hoisting method and crane Download PDF

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Publication number
CN115043340A
CN115043340A CN202210628475.XA CN202210628475A CN115043340A CN 115043340 A CN115043340 A CN 115043340A CN 202210628475 A CN202210628475 A CN 202210628475A CN 115043340 A CN115043340 A CN 115043340A
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CN
China
Prior art keywords
mast
main arm
pulley block
amplitude
winch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210628475.XA
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Chinese (zh)
Inventor
周玉龙
陈宏伟
张姗
谢鹏
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Construction Machinery Branch of XCMG
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Construction Machinery Branch of XCMG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Construction Machinery Branch of XCMG filed Critical Construction Machinery Branch of XCMG
Priority to CN202210628475.XA priority Critical patent/CN115043340A/en
Publication of CN115043340A publication Critical patent/CN115043340A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/82—Luffing gear
    • B66C23/821—Bracing equipment for booms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/82—Luffing gear
    • B66C23/821—Bracing equipment for booms
    • B66C23/823—Bracing equipment acting in vertical direction

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)

Abstract

The invention discloses a double-amplitude-variable hoisting system, a hoisting method and a crane in the technical field of crane equipment, and aims to solve the problem that the load requirement of hoisting equipment is difficult to reduce under standard working conditions in the prior art. The device comprises an action mechanism, a rotary table and a control unit, wherein the rotary table and the control unit are arranged on the action mechanism, and a mast and a main arm are respectively hinged to one side of the rotary table; the mast and the main arm are connected with each other at one side far away from the hinged end, the main arm and one side far away from the hinged end of the mast are respectively connected with a first pulley block and a second pulley block, and a first variable amplitude winch capable of leading out a steel wire rope to be connected with the first pulley block and the second pulley block is installed on the mast. The invention is used for adjusting the stress state of the boom under the standard working condition, can effectively meet the requirements of reducing the load under different working conditions, can avoid the problem of mast angle limitation, and can greatly improve the economic benefit of equipment under the standard working condition.

Description

Double-amplitude hoisting system, hoisting method and crane
Technical Field
The invention relates to a double-amplitude-variation hoisting system, a hoisting method and a crane, and belongs to the technical field of crane equipment.
Background
At present, the arm support of the crawler crane is pulled up mainly by means of component force applied to the arm head by a pulling plate and perpendicular to the center line of the arm support, and the component force is larger, so that the arm lifting capacity is larger. Under the standard working condition, the main arm is connected with the mast through the pulling plate, the angle between the main arm and the mast is fixed, and the variable amplitude winch reduces the angle between the mast and the rotary table by tightening the steel wire rope between the mast and the pulley block on the rotary table, so that the main arm can be lifted. In the design process, the length of a pulling plate between a mast and a jib frame can be controlled, the angle between the mast and a rotary table is large enough when the jib lifting initial state is ensured, the jib frame can lift to the maximum working angle, however, in the state, the angle between the mast and the pulling plate is small, the effective jib lifting component force is small, for a lengthened main jib, the required load is larger, the use requirement of equipment is greatly improved, the safety performance is reduced, the use cost is increased, and good economic benefit is not achieved.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a double-variable-amplitude hoisting system, a hoisting method and a crane, which are used for adjusting the stress state of a hoisting arm under a standard working condition, can effectively meet the requirements of different working conditions on reducing load, can avoid the problem of mast angle limitation, and can greatly improve the economic benefit of equipment under the standard working condition.
In order to realize the purpose, the invention is realized by adopting the following technical scheme:
on one hand, the double-amplitude hoisting system provided by the invention comprises an action mechanism, a rotary table and a control unit, wherein the rotary table and the control unit are arranged on the action mechanism, and one side of the rotary table is respectively hinged with a mast and a main arm;
the mast and one side of the main arm, which is far away from the hinged end, are connected with each other, the main arm and one side of the mast, which is far away from the hinged end, are respectively connected with a first pulley block and a second pulley block, and a first variable amplitude winch capable of leading out a steel wire rope to be connected with the first pulley block and the second pulley block is arranged on the mast;
an amplitude variation pulley block is rotatably arranged on the rotary table, a second amplitude variation winch is arranged on the rotary table, and a guy rope penetrating through the upper end of the mast is wound between the amplitude variation pulley block and the second amplitude variation winch;
the control unit is used for controlling the first variable amplitude winch to drive the steel wire rope to contract the distance between the first pulley block and the second pulley block and controlling the second variable amplitude winch to pull up the main arm and the mast mechanism.
Specifically, one side, far away from the hinge point, of the main arm is rotatably provided with a first pulling plate, one side, far away from the hinge point, of the mast is rotatably provided with a second pulling plate, and the first pulley block and the second pulley block are respectively installed on one sides, far away from the rotating shaft, of the first pulling plate and the second pulling plate.
Specifically, an angle sensor is arranged between the second pulling plate and the mast, and the angle sensor is electrically connected with the control unit.
Specifically, a laser emitter perpendicular to the mast is installed at the connecting position of the top of the mast, a light receiver is installed at the connecting position of the end part of the main arm, and the light receiver is electrically connected with the control unit.
Specifically, the main arm is provided with a tilt sensor, and the tilt sensor is electrically connected with the control unit.
On the other hand, the invention provides a double-amplitude hoisting method, which comprises any one of the double-amplitude hoisting systems, and the method comprises the following steps:
the second variable amplitude winch is driven by the control unit to adjust the inclination angle between the mast and the rotary table until the connecting line between the mast and the end part of the main arm is perpendicular to the mast, and the action of the second variable amplitude winch is stopped;
after the angle between the mast and the main arm is determined, the first variable-amplitude winch is driven to retract a steel wire rope between the first pulley block and the second pulley block, so that a connecting mechanism between the end part of the mast and the end part of the main arm is in a tensioned state;
and the second variable-amplitude winch is started again to hoist the main arm.
Specifically, after the second variable-amplitude winch performs the second action, the first variable-amplitude winch is started after the load required by the main arm to be hoisted is obviously reduced, and the main arm is hoisted synchronously.
Specifically, the load of the main arm to be suspended is determined by determining an inclination angle between the main arm and a horizontal plane.
Specifically, the second action angle of the first luffing winch is an included angle of more than 10 degrees between the main arm and the horizontal direction.
In a final aspect, the invention provides a double-luffing crane, which comprises the double-luffing hoisting system.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the length of the connecting structure between the end part of the mast and the main arm is adjusted by arranging the first variable-amplitude winch at the mast part to adjust the distance between the first pulley block and the second pulley block, the hoisting part can adjust the mast to a proper angle to lift the action torque when acting, so that the best lifting effect of force application is ensured, the distance between the first pulley block and the second pulley block is converged again after the load required by the boom is reduced, and the boom can be ensured to accurately fall on a working condition position.
Drawings
FIG. 1 is a schematic structural diagram of a double-luffing crane according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a stress state of a double-amplitude crane provided by the embodiment of the invention;
reference numerals: 1. an actuating mechanism; 2. a turntable; 3. a mast; 41. a first pulley block; 42. a second pulley block; 43. an amplitude variation pulley block; 51. a first pulling plate; 52. a second pulling plate; 6. a main arm; 71. a first amplitude-variable winch; 72. a second amplitude-variable winch; 81. a wire rope; 82. a pull rope.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The first embodiment is as follows:
the double-variable-amplitude hoisting system provided by the embodiment of the invention is used for adjusting the stress state of a hoisting arm under a standard working condition, can effectively meet the requirements of reducing loads under different working conditions, can avoid the problem of mast angle limitation, can greatly improve the economic benefit of equipment under the standard working condition, and comprises an action mechanism 1, a rotary table 2 and a control unit, wherein the rotary table 2 is arranged on the action mechanism 1, and a mast 3 and a main arm 6 are respectively hinged to one side of the rotary table 2; in order to ensure the connection of the structural parts, the sides of the mast 3 and the main arm 6 far away from the hinged end are connected with each other, the sides of the main arm 6 and the mast 3 far away from the hinged end are respectively connected with a first pulley block 41 and a second pulley block 42, a first luffing winch 71 which can lead out a steel wire rope 81 and is connected with the first pulley block 41 and the second pulley block 42 is arranged on the mast 3, the distance between the first pulley block 41 and the second pulley block 42 is realized by controlling the first luffing winch 71, and the distance between the end part of the mast 3 and the end part of the main arm 6 is adjusted; in order to ensure the arm-raising action, an amplitude-changing pulley block 43 is rotatably arranged on the rotary table 2, a second amplitude-changing winch 72 is arranged on the rotary table 2, and a guy rope 82 penetrating through the upper end of the mast 3 is wound between the amplitude-changing pulley block 43 and the second amplitude-changing winch 72; the control unit at this time is used for controlling the first luffing winch 71 to drive the steel wire rope 81 to contract the distance between the first pulley block 41 and the second pulley block 42 and controlling the second luffing winch 72 to pull up the main arm 6 and the mast 3 mechanism, when the system acts, the mast 3 is firstly adjusted to a proper position, then the second luffing winch 72 is started to act and pull up, when the required load is reduced, the first luffing winch 71 is started again to act to adjust the included angle between the mast 3 and the main arm 6, and the system overcomes the problem that the main arm 6 cannot accurately move to the working state corresponding to the working condition due to the limited angle.
In order to prevent unstable deflection of the first pulley block 41 and the second pulley block 42, a first pulling plate 51 is rotatably arranged on one side of the main arm 6 away from the hinge point, and a second pulling plate 52 is rotatably arranged on one side of the mast 3 away from the hinge point, in the double-amplitude hoisting system provided by the embodiment of the invention, stable deflection of the first pulley block 41 and the second pulley block 42 can be ensured by respectively installing the first pulling plate 51 and the second pulling plate 52 on one sides of the first pulling plate 51 and the second pulling plate 52 away from the rotating shaft (as shown in fig. 1).
The double-luffing hoisting system provided by the embodiment of the invention specifically provides a means for detecting the proper position of the mast 3, and the angle sensor is arranged between the second pulling plate 52 and the mast 3, so that when the connecting mechanism between the mast 3 and the main jib 6 is at a certain angle, a prompt is given or an action is started (ideally, the connecting mechanism should be in a vertical state, which can be referred to as the following description), and the angle sensor should be electrically connected with the control unit.
In the double-variable-amplitude hoisting system provided by the embodiment of the invention, considering that the connecting mechanism between the main jib 6 and the mast 3 may be in a non-straightening state when the mast 3 is adjusted, and at this time, a corresponding error exists in the angle measured by the angle sensor to influence the actual use effect of the equipment, for this reason, a laser transmitter perpendicular to the mast 3 may be installed at the connecting position at the top of the mast 3, and an optical receiver is installed at the connecting position at the end of the main jib 6 to receive a laser signal, and the optical receiver should be electrically connected with the control unit at this time, and when the optical receiver receives the optical signal of the laser transmitter, the mast 3 is adjusted to a proper working condition position.
The double-amplitude hoisting system provided by the embodiment of the invention is not convenient for hoisting the main arm 6 in the later period, and the inclination angle sensor can be arranged on the main arm 6 and is electrically connected with the control unit, so that when the load required by equipment is obviously reduced, the action efficiency can be improved by synchronously driving the first amplitude winch 71 and the second amplitude winch 72.
Example two:
the embodiment of the invention provides a double-amplitude hoisting method, in particular to a control method applying a double-amplitude hoisting system, which comprises the following steps: firstly, the control unit drives the second variable amplitude winch 72 to adjust the inclination angle between the mast 3 and the rotary table 2 until the connecting line between the end parts of the mast 3 and the main jib 6 is perpendicular to the mast 3, and the action of the second variable amplitude winch 72 is stopped; after the angle between the mast 3 and the main jib 6 is determined, the first luffing winch 71 is driven to converge the steel wire rope 81 between the first pulley block 41 and the second pulley block 42, so that the connecting mechanism between the end part of the mast 3 and the end part of the main jib 6 is in a tensioned state; and the second luffing winch 72 is started again to hoist the main arm 6.
Referring to fig. 2, the most suitable angle of mast 3 is determined according to the following that, in the process of normal jib 6 jib lifting, at the beginning, the jib is level to the ground, and the stress of the luffing system members including the plate pulling force of the jib 6, the axial force of mast 3, the main luffing force and the like is in the maximum state, along with the jib 6, the main luffing system members are subjected to the maximum stressThe lifting angle of (2) is increased, and the component force of the amplitude-changing system is reduced. An included angle alpha between the main arm 6 and the first pulling plate 51 is set 3 Angle alpha between mast 3 and first pulling plate 51 4 The included angle between the mast 3 and the guy rope 82 is alpha 5 (ii) a To give F 1 、F 2 、F 3 The relationship between is
F 2 ＝F 1 ·Sinα 4 ·Cosα 5 +F 1 Cosα 4
F 3 ＝F 1 ·Sinα 4 /Sinα 5
The crawler crane lifts the main arm 6 mainly by the component force provided by the first pulling plate 51 to the main arm 6 which is vertical to the main arm 6, so that alpha 3 The greater the angle, the less the pull plate force F1 is required. When the mast 3 forms an angle alpha with the first pulling plate 51 4 When equal to 90 deg., alpha 3 Maximum, the required pull plate force F1 is minimum. At this time F 2 、F 3 All values of (c) are minimal; therefore, the length of the distance control C between the first pulley block 41 and the second pulley block 42 is changed, the first pulling plate 51 of the jib is ensured to be vertical to the mast 3, the component force of the luffing system can be effectively reduced, and the optimal stress state is achieved.
In the double-amplitude hoisting method provided by the embodiment of the invention, in order to facilitate the hoisting of the working efficiency of the main arm, after the second amplitude winch 72 performs the second action, when the load required for hoisting the main arm 6 is obviously reduced, the first amplitude winch 71 is started, and the main arm 6 is hoisted through synchronous action acceleration.
The embodiment of the invention provides a double-amplitude hoisting method, and particularly provides a basis for the second action of the first amplitude winch 71, the specific judgment method for suspending the load of the main arm 6 is to judge the inclination angle between the main arm 6 and the horizontal plane, the judgment method is an estimation algorithm, a specific value cannot be provided, when the included angle between the main arm 6 and the horizontal plane is large, the load required by equipment is obviously reduced, and at the moment, the first amplitude winch 71 is started.
According to the double-amplitude hoisting method provided by the embodiment of the invention, the second action angle of the first amplitude winch 71 is set to be an included angle of more than 10 degrees between the main arm 6 and the horizontal direction.
Example three:
the double-luffing crane provided by the embodiment of the invention specifically comprises the double-luffing hoisting system in any one of the embodiments, and the crane applied to the system can effectively meet different hoisting requirements and ensure good working benefits.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A double-amplitude hoisting system is characterized by comprising an action mechanism (1), a rotary table (2) and a control unit, wherein the rotary table (2) is arranged on the action mechanism (1), and one side of the rotary table (2) is respectively hinged with a mast (3) and a main arm (6);
one sides, far away from the hinged end, of the mast (3) and the main arm (6) are connected with each other, one sides, far away from the hinged end, of the main arm (6) and the mast (3) are respectively connected with a first pulley block (41) and a second pulley block (42), and a first variable-amplitude winch (71) which can lead out a steel wire rope (81) and is connected with the first pulley block (41) and the second pulley block (42) is installed on the mast (3);
an amplitude variation pulley block (43) is rotatably arranged on the rotary table (2), a second amplitude variation winch (72) is arranged on the rotary table (2), and a guy cable (82) penetrating through the upper end of the mast (3) is wound between the amplitude variation pulley block (43) and the second amplitude variation winch (72);
the control unit is used for controlling the first variable-amplitude winch (71) to drive the steel wire rope (81) to contract the distance between the first pulley block (41) and the second pulley block (42) and controlling the second variable-amplitude winch (72) to pull up the main arm (6) and the mast (3) mechanism.
2. The double-amplitude lifting system as claimed in claim 1, wherein a first pulling plate (51) is rotatably arranged on one side of the main arm (6) far away from the hinge point, a second pulling plate (52) is rotatably arranged on one side of the mast (3) far away from the hinge point, and the first pulley block (41) and the second pulley block (42) are respectively arranged on one sides of the first pulling plate (51) and the second pulling plate (52) far away from the rotating shaft.
3. Double luffing hoisting system according to claim 2, wherein an angle sensor is arranged between the second pulling plate (52) and the mast (3), which angle sensor is electrically connected to the control unit.
4. The double-luffing hoisting system of claim 1, wherein the mast (3) is provided at a connection point at the top thereof with a laser transmitter perpendicular to the mast (3), and the mast (6) is provided at a connection point at the end thereof with a light receiver electrically connected to the control unit.
5. The double luffing hoisting system of any one of claims 1 to 4, wherein the main jib (6) is provided with a tilt sensor, and the tilt sensor is electrically connected to the control unit.
6. A double luffing hoisting method, comprising a double luffing hoisting system according to any one of claims 1-5, the method comprising the steps of:
the second variable-amplitude winch (72) is driven by the control unit to adjust the inclination angle between the mast (3) and the rotary table (2) until the connecting line between the mast (3) and the end part of the main arm (6) is perpendicular to the mast (3) to stop the action of the second variable-amplitude winch (72);
after the angle between the mast (3) and the main arm (6) is determined, a first amplitude variation winch (71) is driven to converge a steel wire rope (81) between a first pulley block (41) and a second pulley block (42), so that a connecting mechanism between the end part of the mast (3) and the end part of the main arm (6) is in a tensioned state;
and the second amplitude-variable winch (72) is started again to hoist the main arm (6).
7. The double-luffing hoisting method according to claim 6, wherein after the second luffing winch (72) is operated for the second time, the first luffing winch (71) is started again after the load required for hoisting the main arm (6) is significantly reduced, and the main arm (6) is hoisted synchronously.
8. A double luffing hoisting system according to claim 7, wherein the load of the suspended main arm (6) is determined by determining the inclination angle between the main arm (6) and the horizontal plane.
9. The double luffing hoisting system of claim 8, wherein the second actuation angle of the first luffing winch (71) is such that the main arm (6) is at an angle of more than 10 ° to the horizontal.
10. A double luffing crane comprising a double luffing hoisting system of any one of claims 1-5.
CN202210628475.XA 2022-06-06 2022-06-06 Double-amplitude hoisting system, hoisting method and crane Pending CN115043340A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210628475.XA CN115043340A (en) 2022-06-06 2022-06-06 Double-amplitude hoisting system, hoisting method and crane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210628475.XA CN115043340A (en) 2022-06-06 2022-06-06 Double-amplitude hoisting system, hoisting method and crane

Publications (1)

Publication Number Publication Date
CN115043340A true CN115043340A (en) 2022-09-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210628475.XA Pending CN115043340A (en) 2022-06-06 2022-06-06 Double-amplitude hoisting system, hoisting method and crane

Country Status (1)

Country Link
CN (1) CN115043340A (en)

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