CN109977608A - A kind of hoisting method and device based on cocked frame - Google Patents
A kind of hoisting method and device based on cocked frame Download PDFInfo
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- CN109977608A CN109977608A CN201910304577.4A CN201910304577A CN109977608A CN 109977608 A CN109977608 A CN 109977608A CN 201910304577 A CN201910304577 A CN 201910304577A CN 109977608 A CN109977608 A CN 109977608A
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- 238000012795 verification Methods 0.000 claims description 17
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- 238000004364 calculation method Methods 0.000 description 6
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Abstract
The invention discloses a kind of hoisting method and device based on cocked frame, comprising: measurement obtains the cocked frame angle of cocked frame；Arm of force parameter is determined according to cocked frame angle；Cocked power is determined according to force parameter and arm of force parameter；Heavy nucleus school has been carried out according to cocked power.Technical solution of the present invention can determine cocked power using simplified method in the structural parameters and movement position of variation to have carried out heavy nucleus school, reduce complexity and error rate, improve versatility.
Description
Technical Field
The present invention relates to cranes, and more particularly, to a method and apparatus for lifting based on a wrenching stand.
Background
For a crawler crane with a lifting oil cylinder structure, in the prior art, required variable data are mostly obtained through two-dimensional graph layout when the lifting frame stress is calculated, and then calculation is carried out. Once the structural parameters or the motion position state of the mechanism change, the variable data required by the calculation also changes, resulting in high complexity and error rate of the calculation process.
Aiming at the problems of high stress complexity and high error rate of the calculation cocking frame in the prior art, no effective solution is provided at present.
Disclosure of Invention
In view of the above, an object of the embodiments of the present invention is to provide a lifting method and apparatus based on a lifting frame, which can determine a lifting force for lifting verification using a simplified method in a changing structural parameter and a motion position, thereby reducing complexity and error rate and improving versatility.
Based on the above purpose, an aspect of the embodiments of the present invention provides a lifting method based on a wrenching frame, including the following steps:
measuring to obtain the angle of the cocking frame;
determining force arm parameters according to the angle of the cocking frame;
determining the cocking force according to the force parameter and the moment arm parameter;
and (5) carrying out lifting checking according to the lifting force.
In some embodiments, determining the moment arm parameter from the cocking block angle comprises:
measuring and obtaining the positions of a hinge point, a gravity center, a vertical center and/or a rotation center of each part;
determining a distance parameter according to the position;
and determining the arm force parameters according to the angle and distance parameters of the cocking frame.
In some embodiments, the moment arm parameter comprises at least one of: the steel wire rope pulling device comprises a pulling force arm, a pulling frame self-gravity arm, a pulling plate self-gravity arm, a steel wire rope friction force arm and a steel wire rope self-gravity arm.
In some embodiments, determining the cocking force as a function of the force parameter and the moment arm parameter comprises:
directly measuring to obtain a force parameter or calculating to obtain the force parameter according to the component parameter;
and determining the cocking force according to the force parameter and the moment arm parameter.
In some embodiments, the force parameter comprises at least one of: the self-weight of the lifting frame, the self-weight of the pulling plate, the friction force of the steel wire rope and the self-weight of the steel wire rope; the self-weight of the lifting frame, the self-weight of the pulling plate and the self-weight of the steel wire rope are obtained by direct measurement, and the friction force of the steel wire rope is obtained by calculating the tension of a single steel wire rope, the efficiency of a single pulley and the multiplying power of a pulley block.
In some embodiments, determining the cocking force as a function of the force parameter and the moment arm parameter comprises:
determining the total moment balance according to the self weight of the cocking frame and the moment arm thereof, the self weight of the pulling plate and the moment arm thereof, the friction force of the steel wire rope and the moment arm thereof, and the self weight of the steel wire rope and the moment arm thereof;
and determining the cocking force according to the cocking force arm and the moment balance total.
In some embodiments, the moment arm parameter is determined according to the cocking stand angle and the distance parameter, and the length of the steel wire rope is also determined.
In some embodiments, while the hoisting verification is performed based on the wrenching force, the hoisting verification is also performed based on the length of the wire rope.
In another aspect of the embodiments of the present invention, there is also provided a hoisting apparatus based on a wrenching stand, including:
one end of the turning frame is hinged to the fixed pivot, and the other end of the turning frame is provided with a pulley;
the lifting oil cylinder is hinged to the lifting frame through an auxiliary mechanism and provides lifting force for the lifting frame;
one end of the pulling plate is hinged to one end of the wrenching frame, which is provided with the pulley, and the other end of the pulling plate is fixed to the main arm root;
the steel wire rope penetrates through the pulley and the pulling plate to extend, one end of the steel wire rope is fixed, and the other end of the steel wire rope is connected to a heavy object;
the lifting device uses the method described above to determine the lifting force for lifting verification.
In some embodiments, the hoisting device also determines the length of the wire rope for hoisting verification using the method described above.
The invention has the following beneficial technical effects: according to the lifting method and device based on the lifting frame, the lifting frame angle of the lifting frame is obtained through measurement, the moment arm parameter is determined according to the lifting frame angle, the lifting force is determined according to the force parameter and the moment arm parameter, and lifting verification is performed according to the lifting force.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other embodiments can be obtained by using the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a lifting method based on a lifting frame according to the present invention;
FIG. 2 is a force analysis diagram of a lifting method based on a lifting frame according to the present invention;
fig. 3 is a schematic structural diagram of a lifting device based on a wrenching frame provided by the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention are described in further detail with reference to the accompanying drawings.
It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it is understood that "first" and "second" are only used for convenience of expression and should not be construed as limitations to the embodiments of the present invention, and the descriptions thereof in the following embodiments are omitted.
In view of the above objects, a first aspect of embodiments of the present invention proposes an embodiment of a method for determining a cocking force for a jack-up verification using a simplified method in varying structural parameters and motion positions. Fig. 1 is a schematic flow chart of an embodiment of a lifting method based on a lifting frame according to the present invention.
The hoisting method based on the wrenching frame comprises the following steps:
step S101, measuring and obtaining a cocking frame angle of the cocking frame;
step S103, determining arm parameters according to the angle of the cocking stand;
step S105, determining a cocking force according to the force parameter and the moment arm parameter;
and step S107, performing lifting check according to the lifting force.
In some embodiments, determining the moment arm parameter from the cocking block angle comprises:
measuring and obtaining the positions of a hinge point, a gravity center, a vertical center and/or a rotation center of each part;
determining a distance parameter according to the position;
and determining the arm force parameters according to the angle and distance parameters of the cocking frame.
In some embodiments, the moment arm parameter comprises at least one of: the steel wire rope pulling device comprises a pulling force arm, a pulling frame self-gravity arm, a pulling plate self-gravity arm, a steel wire rope friction force arm and a steel wire rope self-gravity arm.
In some embodiments, determining the cocking force as a function of the force parameter and the moment arm parameter comprises:
directly measuring to obtain a force parameter or calculating to obtain the force parameter according to the component parameter;
and determining the cocking force according to the force parameter and the moment arm parameter.
In some embodiments, the force parameter comprises at least one of: the self-weight of the lifting frame, the self-weight of the pulling plate, the friction force of the steel wire rope and the self-weight of the steel wire rope; the self-weight of the lifting frame, the self-weight of the pulling plate and the self-weight of the steel wire rope are obtained by direct measurement, and the friction force of the steel wire rope is obtained by calculating the tension of a single steel wire rope, the efficiency of a single pulley and the multiplying power of a pulley block.
In some embodiments, determining the cocking force as a function of the force parameter and the moment arm parameter comprises:
determining the total moment balance according to the self weight of the cocking frame and the moment arm thereof, the self weight of the pulling plate and the moment arm thereof, the friction force of the steel wire rope and the moment arm thereof, and the self weight of the steel wire rope and the moment arm thereof;
and determining the cocking force according to the cocking force arm and the moment balance total.
In some embodiments, the moment arm parameter is determined according to the cocking stand angle and the distance parameter, and the length of the steel wire rope is also determined.
In some embodiments, while the hoisting verification is performed based on the wrenching force, the hoisting verification is also performed based on the length of the wire rope.
The specific calculation method can be further explained with reference to the force analysis diagram of fig. 2. As shown in FIG. 2, A1The hinge point of the stand is turned up; a. the2The center of gravity of the wrenching frame; a. the3Rotating the center of the pulley; a. the4Is a hinge point of the pulling plate and the wrenching frame; a. the5The hinge point of the oil cylinder is lifted; a. the6Rotating the center of the pulley of the rotary table; a. the7Is a vertical point of the wrenching oil cylinder and the wrenching frame; a. the8Is a hinged point of the wrenching oil cylinder and the auxiliary mechanism; a. the9Is the center of gravity of the steel wire rope; f is the cocking force; gbqFor self weight of the wrenching frame, η for angle of the wrenching frame, G2The dead weight of the pulling plate; m is the labor-saving multiplying power of the pulley block; sl is the pretightening force of a single steel wire rope. Corresponding to FIG. 2, it can be determined that A1A3For lifting, A5A8For cocking cylinders, A3A6Is a pulling plate.
The calculated force arm parameters comprise a pulling force arm, a pulling frame self-gravity arm, a pulling plate self-gravity arm, a steel wire rope friction force arm and a steel wire rope self-gravity arm. Specifically, the method comprises the following steps:
arm l of the lifting force FF＝A1A5×sin∠A1A5A8，
Wherein,
while
Thus, it is possible to provide
Self weight G of the lifting framebqArm of force
Self weight of pulling plate G2Arm of force
Wire rope friction force fGsArm of force
Wherein,
and is
Force arm of self weight Gs of steel wire rope
Wherein,
and is
The steel wire rope friction force is obtained by calculating the tension of a single steel wire rope, the efficiency of a single pulley and the multiplying power of a pulley block: friction of steel cable
Wherein S isL1η for single variable-amplitude steel rope tension (N)0For single pulley efficiency, m is the multiplying power of the pulley block.
Finally, balanced by momentCan obtain the turning-up force
Wherein F is the cocking force, GbqFor lifting the frame and gravity of the pulley G2Is weight of the drawplate, fGsIs the friction force of the steel wire rope.
The invention only needs to input the angle η of the lifting frame when in use, other needed parameters are stored as constants without repeated acquisition or measurement, the output lifting force F can be regarded as a function of η, thereby reducing the calculation complexity to better carry out lifting check calibration, and the intermediate parameters can be simultaneously output to carry out the same lifting check calibration.
Additionally, the wire rope length L:
where k is the sag factor, generally takenβ takes 50 as empirical value, and takes k as 1 when η is less than or equal to 1150.
It can be seen from the above embodiments that, in the lifting method based on the cocking stand provided by the embodiments of the present invention, the cocking stand angle of the cocking stand is obtained through measurement, the moment arm parameter is determined according to the cocking stand angle, the cocking force is determined according to the force parameter and the moment arm parameter, and the lifting verification is performed according to the cocking force.
It should be particularly noted that, the steps in the embodiments of the hoisting method based on the cocking stand can be mutually intersected, replaced, added and deleted, so that the reasonable permutation and combination change of the hoisting method based on the cocking stand also belongs to the protection scope of the present invention, and the protection scope of the present invention should not be limited to the embodiments.
In view of the above, a second aspect of embodiments of the present invention proposes an embodiment of a device that enables determination of a cocking force for a jack verification using a simplified method in varying structural parameters and motion positions. Fig. 3 is a schematic structural diagram of an embodiment of a lifting device based on a wrenching frame provided by the invention.
The device comprises:
one end of the turning-up frame 3 is hinged to the fixed pivot, and a pulley is arranged at one end;
the cocking oil cylinder 4 is hinged to the cocking frame 3 through an auxiliary mechanism and provides cocking force for the cocking frame 3;
one end of the pulling plate 2 is hinged to one end of the wrenching frame 3 provided with the pulley, and the other end of the pulling plate is fixed to the main arm root 1;
the steel wire rope penetrates through the pulley and the pulling plate 2 to extend, one end of the steel wire rope is fixed, and the other end of the steel wire rope is connected to a heavy object;
the lifting device uses the method described above to determine the lifting force for lifting verification.
In some embodiments, the hoisting device also determines the length of the wire rope for hoisting verification using the method described above.
It can be seen from the above embodiments that, according to the lifting device based on the lifting frame provided by the embodiments of the present invention, the lifting frame angle of the lifting frame is obtained through measurement, the moment arm parameter is determined according to the lifting frame angle, the lifting force is determined according to the force parameter and the moment arm parameter, and the lifting verification is performed according to the lifting force.
It should be particularly noted that the above-mentioned embodiments of the lifting apparatus based on the lifting frame use the embodiments of the lifting method based on the lifting frame to specifically describe the working process of each module, and those skilled in the art can easily think that these modules are applied to other embodiments of the lifting method based on the lifting frame. Of course, since the steps in the embodiment of the lifting method based on the lifting frame can be mutually intersected, replaced, added, or deleted, these reasonable permutations and combinations should also belong to the scope of the present invention, and should not limit the scope of the present invention to the embodiment.
The foregoing is an exemplary embodiment of the present disclosure, but it should be noted that various changes and modifications could be made herein without departing from the scope of the present disclosure as defined by the appended claims. The functions, steps and/or actions of the method claims in accordance with the disclosed embodiments described herein need not be performed in any particular order. Furthermore, although elements of the disclosed embodiments of the invention may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.
It should be understood that, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly supports the exception. It should also be understood that "and/or" as used herein is meant to include any and all possible combinations of one or more of the associated listed items. The sequence numbers of the embodiments disclosed in the embodiments of the present invention are merely for description, and do not represent the merits of the embodiments.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, of embodiments of the invention is limited to these examples; within the idea of an embodiment of the invention, also technical features in the above embodiment or in different embodiments may be combined and there are many other variations of the different aspects of an embodiment of the invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of the embodiments of the present invention are intended to be included within the scope of the embodiments of the present invention.
Claims (10)
1. A lifting method based on a lifting frame is characterized by comprising the following steps:
measuring and obtaining a cocking frame angle of the cocking frame;
determining force arm parameters according to the angle of the cocking frame;
determining the cocking force according to the force parameter and the force arm parameter;
and carrying out lifting checking according to the lifting force.
2. The method of claim 1, wherein determining the moment arm parameter as a function of the cocking stand angle comprises:
measuring and obtaining the positions of a hinge point, a gravity center, a vertical center and/or a rotation center of each part;
determining a distance parameter according to the position;
and determining the moment arm parameter according to the angle of the cocking frame and the distance parameter.
3. The method of claim 2, wherein the moment arm parameter comprises at least one of: the steel wire rope pulling device comprises a pulling force arm, a pulling frame self-gravity arm, a pulling plate self-gravity arm, a steel wire rope friction force arm and a steel wire rope self-gravity arm.
4. The method of claim 1, wherein determining the cocking force from the force parameter and the moment arm parameter comprises:
directly measuring the force parameter or calculating the force parameter according to the component parameter;
and determining the cocking force according to the force parameter and the moment arm parameter.
5. The method of claim 4, wherein the force parameter comprises at least one of: the self-weight of the lifting frame, the self-weight of the pulling plate, the friction force of the steel wire rope and the self-weight of the steel wire rope; the self-weight of the lifting frame, the self-weight of the pulling plate and the self-weight of the steel wire rope are obtained by direct measurement, and the friction force of the steel wire rope is obtained by calculating the tension of a single steel wire rope, the efficiency of a single pulley and the multiplying power of a pulley block.
6. The method of claim 1, wherein determining the cocking force from the force parameter and the moment arm parameter comprises:
determining the total moment balance according to the self weight of the cocking frame and the moment arm thereof, the self weight of the pulling plate and the moment arm thereof, the friction force of the steel wire rope and the moment arm thereof, and the self weight of the steel wire rope and the moment arm thereof;
and determining the cocking force according to the cocking force arm and the moment balance total amount.
7. The method of claim 2, wherein the moment arm parameter is determined from the cocking stand angle and the distance parameter, and the wire rope length is also determined.
8. The method of claim 7, wherein the hoisting verification is performed based on the haul force and also based on the length of the wire rope.
9. A hoisting device based on a wrenching frame is characterized by comprising:
one end of the turning frame is hinged to the fixed pivot, and the other end of the turning frame is provided with a pulley;
the cocking oil cylinder is hinged to the cocking frame through an auxiliary mechanism and provides cocking force for the cocking frame;
one end of the pulling plate is hinged to one end of the turning frame, which is provided with the pulley, and the other end of the pulling plate is fixed to the main arm root;
a wire rope extending through the pulley and the pulling plate, one end of the wire rope being fixed and the other end being connected to a weight;
the hoisting device uses the method according to any one of claims 1-8 for determining a cocking force for hoisting verification.
10. An arrangement according to claim 9, characterized in that the hoisting device also uses the method according to any of claims 7-8 for determining the wire rope length for hoisting verification.
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| CN201910304577.4A CN109977608B (en) | 2019-04-16 | 2019-04-16 | Hoisting method and device based on cocking frame |
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| CN201910304577.4A CN109977608B (en) | 2019-04-16 | 2019-04-16 | Hoisting method and device based on cocking frame |
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