CN113060659A

CN113060659A - Arm support device and hoisting equipment

Info

Publication number: CN113060659A
Application number: CN202110509775.1A
Authority: CN
Inventors: 周玉龙; 赵江平; 孙丽; 孟进军
Original assignee: Construction Machinery Branch of XCMG
Current assignee: Construction Machinery Branch of XCMG
Priority date: 2021-05-11
Filing date: 2021-05-11
Publication date: 2021-07-02

Abstract

The present disclosure relates to a boom device and a hoisting apparatus, wherein the boom device includes: the cantilever crane device comprises a plurality of cantilever crane sections (1), wherein the cantilever crane sections (1) are sequentially arranged along the length direction of the cantilever crane device, each cantilever crane section (1) in the plurality of cantilever crane sections (1) comprises at least one cantilever crane body (10), and each cantilever crane body (10) comprises a plurality of main chords (11) and forms a space truss structure; and the connecting part (2) is connected between adjacent arm support sections (1) in the arm support sections (1), the connecting part (2) comprises a plurality of joint units (21) and a plurality of connecting rods (22), each connecting rod (22) is detachably connected between the adjacent joint units (21) to form a frame structure, the frame structure is matched with the layout of at least one arm support body (10), and the two ends of each joint unit (21) are detachably connected with the main chord (11) at the corresponding position in the adjacent arm support section (1) respectively.

Description

Arm support device and hoisting equipment

Technical Field

The disclosure relates to the technical field of engineering machinery, in particular to a boom device and hoisting equipment.

Background

When hoisting construction is carried out on hoisting equipment, efficiency and safety are key considered factors, the current trend that large-scale components are prefabricated in advance in a modularized mode on the ground and integrated hoisting of petrochemical tanks is more and more trend, and hoisting construction needs to be carried out by adopting an ultra-large and ultra-heavy device, so that higher requirements are put forward on the arm support bearing capacity of the hoisting equipment. According to the practical engineering, the hoisting ratio of the overweight part is not too high, the overweight part accounts for the hoisting of the medium-sized below parts mostly, and the problem of overhigh operation cost is often faced when the overweight part is hoisted by the ultra-large crane in the process of hoisting the medium-sized below parts. Therefore, the boom system can meet the requirements of hoisting the overweight part and is convenient to assemble, and the problem of improving the hoisting capacity and utilization rate of the boom is urgently needed to be solved.

Disclosure of Invention

The embodiment of the disclosure provides a boom device and hoisting equipment, which can be conveniently suitable for different hoisting working conditions.

According to a first aspect of the present disclosure, there is provided a boom apparatus, including:

the boom device comprises a boom device, a plurality of boom sections and a plurality of boom frames, wherein the boom sections are sequentially arranged along the length direction of the boom device, each boom section of the boom sections comprises at least one boom body, and each boom body comprises a plurality of main chords and forms a space truss structure; and

the connecting component is connected between adjacent arm support sections in the arm support sections and comprises a plurality of joint units and a plurality of connecting rods, each connecting rod is detachably connected between the adjacent joint units to form a frame structure in an assembling mode, the frame structure is matched with the layout of at least one arm support body, and two ends of each joint unit are detachably connected with the main chord members at corresponding positions in the adjacent arm support sections respectively.

In some embodiments, each boom section comprises a plurality of boom bodies, and the plurality of connecting rods in the same connecting member comprises:

the four main chords of the cantilever crane body are enclosed to form a rectangle, the size of the rectangle is consistent, and each corner of the rectangle is provided with a joint unit; and

and a plurality of second connecting rods connected between the joint units adjacent to each other in the adjacent rectangular units.

In some embodiments, the number of boom bodies is even and arranged in a rectangular array, and the number and layout of the rectangular units are adapted to the boom bodies.

In some embodiments, the number of the boom bodies is odd, the plurality of boom bodies are divided into a plurality of groups and are arranged at intervals, one group of boom bodies comprises one boom body, the other group of boom bodies comprises at least two boom bodies, the outer ends of the boom bodies of the groups are flush, and the number and the layout of the rectangular units are matched with those of the boom bodies.

In some embodiments, the joint unit includes a body portion having a rectangular cross section, the end portion of the connecting rod has a first joint, and the plurality of joint units includes: the first joint unit is arranged at the corner of the frame structure, and two adjacent side walls of the first joint unit are provided with lug plates;

the plurality of connector units optionally comprises:

the second joint unit is arranged at the position of the corner of the outer side edge of the frame structure, and three side walls of the second joint unit are provided with ear plates; and

the third joint unit is arranged in the inner area of the frame structure, and four side walls of the third joint unit are provided with lug plates;

wherein the first joint is hinged with the ear plate.

In some embodiments, the joint unit includes a main body portion, and a second joint and a third joint respectively connected to two ends of the main body portion, in adjacent boom sections, a fourth joint is provided at an outer end of a main chord in one boom section, a fifth joint is provided at an outer end of a main chord in the other boom section, the fourth joint is hinged to the second joint, and the fifth joint is hinged to the third joint.

In some embodiments, the plurality of tie bars are spaced apart in two layers in the length direction.

In some embodiments, the arm support body comprises a plurality of arm sections arranged along the length direction, and the main chords of the adjacent arm sections are detachably connected.

In some embodiments, the boom sections further comprise a stiffener connected between the main chords of adjacent boom bodies.

In some embodiments, the arm support body includes four main chords and a plurality of connecting rods, the four main chords enclose to form a structure with a quadrilateral end face, any adjacent main chords are connected through a part of the connecting rods, and each connecting rod in the plurality of connecting rods is detachably connected between the adjacent main chords.

According to a second aspect of the present disclosure, a hoisting device is provided, which includes the boom apparatus of the above embodiment.

In some embodiments, the lifting apparatus comprises two boom devices, the two boom devices being arranged in parallel, spaced apart, or at an angle.

According to the boom device provided by the embodiment of the disclosure, adjacent boom sections are connected through the connecting part, the connecting part comprises a plurality of joint units and a plurality of connecting rods, each connecting rod is detachably connected between the adjacent joint units to form a frame structure, the frame structure is matched with the layout of at least one boom body, and two ends of each joint unit are detachably connected with the main chord rods at corresponding positions in the adjacent boom sections respectively. The detachable splicing structure is adopted by the connecting part, so that the structural form of the connecting part can be flexibly and conveniently adjusted according to the layout form of the boom frame body, the connecting part with various structures does not need to be processed in advance, the adaptability of the boom frame device to the hoisting working condition can be improved by various deformation modes, the bearing capacity of the boom frame device under the super-large hoisting working condition can be met, and the capacity waste under the medium and small hoisting working conditions can be avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure. In the drawings:

fig. 1A and 1B are a side view and a cross-sectional view of a boom apparatus in the prior art, respectively.

Fig. 2 is a schematic structural view of some embodiments of the boom apparatus of the present disclosure.

Fig. 3 is a schematic structural diagram of some embodiments of a connecting part in the boom apparatus of the present disclosure.

Fig. 4 is a schematic diagram illustrating a connection part of the boom device according to the present disclosure when an even number of boom bodies are provided.

Fig. 5 is a schematic diagram illustrating an alternative configuration of a connecting member in the boom apparatus according to the present disclosure when odd number of boom bodies are provided.

Fig. 6 is a schematic structural diagram of some embodiments of arm sections in the boom apparatus of the present disclosure.

Description of the reference numerals

1a, a main chord; 2a, a connecting rod;

1. a boom section; 10. an arm frame body; 10', arm sections; 11. a main chord; 111. a fourth joint; 112. a hinged seat; 12. a connecting rod; 121. a first link; 122. a second link;

2. a connecting member; 21. a joint unit; 21A, a main body part; 21B, a second joint; 21C, a third joint; 211. a first joint unit; 212. a second joint unit; 213. a third joint unit; 214. an ear plate; 22. a connecting rod; 221. a first connecting rod; 222. a second connecting rod; 223. a first joint; u, rectangular unit.

Detailed Description

The present disclosure is described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Aspects so defined may be combined with any other aspect or aspects unless clearly indicated to the contrary. In particular, any feature considered to be preferred or advantageous may be combined with one or more other features considered to be preferred or advantageous.

The terms "first", "second", and the like in the present disclosure are merely for convenience of description to distinguish different constituent elements having the same name, and do not denote a sequential or primary-secondary relationship.

In the description of the present invention, it is to be understood that the terms "inner", "outer", "upper", "lower", "left" and "right", etc., indicating orientations or positional relationships, are defined with reference to a driver sitting in a vehicle seat, are used for convenience of description of the present invention only, and do not indicate or imply that the device referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the present invention.

The present disclosure provides a boom apparatus, which may be used in a crane, and which is a space truss structure for lifting a heavy object to a certain height and amplitude and capable of bearing an axial force and a bending moment. The arm support belongs to a bidirectional bending component, namely, when the hoisting equipment is in hoisting work, the arm support device bears the action of axial force and bending moment in an amplitude variation plane and a rotation plane. The variable amplitude plane is a plane determined by the arm support and the variable amplitude pulling plate, and the arm support is used as a mechanical model with two simply-supported ends for analysis in the variable amplitude plane. The rotation plane is a plane which is parallel to the ground and is vertical to the amplitude variation plane, and in the rotation plane, the arm support is used as a mechanical model with one fixed end and one free end for analysis.

As shown in fig. 1A and 1B, the universal boom of the hoisting equipment generally includes four main chords 1A and a plurality of connecting rods 12a connected between the main chords 1A, and the connecting rods 12a and the main chords 1A are welded to form a truss structure. In terms of stress, the arm support belongs to a bidirectional bending component, namely, when the hoisting equipment is hoisted and carried to work, the arm support bears the action of axial force and bending moment in an amplitude variation plane and a rotation plane, so that the analysis of the section of the arm support requires enough sectional area to ensure the strength of the section of the arm support so as to resist the action of the axial force, and the analysis of the section of the arm support requires enough sectional width B and height H to ensure the inertia moment in the two planes so as to resist the action of the bending moment. In order to improve the bearing capacity of the arm support, the sectional size of the arm support needs to be increased, so that the weight of the arm support is increased, and the size of the arm support is limited by road transportation.

The present disclosure provides a boom apparatus, which in some embodiments, as shown in fig. 2 and 3, comprises a plurality of boom sections 1 and a connecting member 2.

The plurality of boom sections 1 are sequentially arranged along the length direction of the boom device, each boom section 1 of the plurality of boom sections 1 comprises at least one boom body 10 in the cross section, and each boom body 10 comprises a plurality of main chords 11 and forms a space truss structure.

The connecting part 2 is connected between adjacent boom sections 1 in the boom sections 1, the connecting part 2 comprises a plurality of joint units 21 and a plurality of connecting rods 22, each connecting rod 22 is detachably connected between the adjacent joint units 21 to form a frame structure, the frame structure is matched with the layout of at least one boom body 10, namely the combination mode of the joint units 21 and the connecting rods 22 is determined according to the size and the layout mode of the boom body 10, and two ends of each joint unit 21 are respectively detachably connected with the main chords 11 at corresponding positions in the adjacent boom sections 1.

According to the boom device provided by the embodiment of the disclosure, adjacent boom sections are connected through the connecting part, each connecting rod in the connecting part is detachably connected between adjacent joint units to form a frame structure, the frame structure is matched with the layout of at least one boom body, and two ends of each joint unit are detachably connected with the main chord at the corresponding position in the adjacent boom section respectively. Because the connecting part adopts a detachable splicing structure and is detachable from the arm support section, the structural form of the connecting part can be flexibly and conveniently adjusted according to the layout form of the arm support body, the connecting parts with various different structural specifications do not need to be processed in advance, and the cost is saved.

Moreover, the arm support device has various deformation modes, the adaptability of the arm support device to the hoisting working condition can be improved, the bearing capacity of the arm support device under the super-large hoisting working condition can be met, and the capacity waste under the medium and small hoisting working conditions can be avoided.

When the arm support device is assembled, the arm support section 1 and the connecting part 2 shown in fig. 2 can be installed as an integral module, so that the assembly efficiency can be improved.

In addition, when the arm support device is transported, the arm support section can be separated from the connecting part, and the connecting part can be disassembled into scattered joint units and connecting rods, so that the requirement on transportation capacity can be reduced.

In some embodiments, as shown in fig. 3, each boom section 1 includes a plurality of boom bodies 10, adjacent boom bodies 10 may be disposed at intervals, and the plurality of connecting rods 22 in the same connecting component 2 includes: a plurality of first connecting rods 221 and a plurality of second connecting rods 222.

Every four first connecting rods 221 in the plurality of first connecting rods 221 enclose to form a rectangular unit U, the number of the rectangular units U is consistent with that of the arm support body 10, the rectangular size of the rectangular units U, which is formed by enclosing the rectangular units U with the four main chords 11 of the arm support body 10, is consistent, each corner of each rectangular unit U is provided with one joint unit 21, and the four first connecting rods 221 are detachably connected with the joint units 21.

The second connection bar 222 is connected between the joint units 21 adjacent to each other in the adjacent rectangular units U. The second connecting bar 222 is used to connect adjacent rectangular units U so that the connecting member 2 forms an integral frame. The second connecting bar 222 is detachably connected to the joint unit 21 located at the corner in the rectangular unit U.

The connecting part 2 of the embodiment can realize the connection of the main chords 11 in the adjacent arm support sections 1, and can reinforce the adjacent arm support bodies 10 in the cross section at the connecting part of the adjacent arm support sections 1 through the second connecting rod 222, so that the bearing capacity of the arm support device is improved, and the deformation degree is reduced.

In some embodiments, as shown in fig. 3 and 4, the number of the boom bodies 10 is even and the boom bodies 10 are arranged in a rectangular array, adjacent boom bodies 10 are arranged at intervals, and the number and the layout of the rectangular units U are adapted to the boom bodies 10. In the arrangement mode, the layout of each arm support body 10 is more compact, and under the condition that the overall dimension of the cross section is fixed, higher bending strength can be achieved in the amplitude variation plane and the rotation plane, and the bearing capacity of the arm support is improved.

For example, as shown in fig. 4, the connecting member 2 at the rightmost middle position includes four rectangular units U (U1-U4) arranged in two rows and two columns to meet the requirement of medium load hoisting. On this basis, a row of rectangular units U (U5-U6) can be added to one side of the boom device in the width direction, and the connecting part 2 can be expanded to connect six boom bodies 10 arranged in two rows and three columns; or one row of rectangular units U (U5-U6) can be added on one side of the boom device in the height direction, and the connecting part 2 can be expanded to be connected with six boom bodies 10 arranged in three rows and two columns, so that the bearing requirement of the boom under the super-large hoisting working condition can be met.

Or the connecting parts 2 of the four rectangular units U can be split into two groups of connecting parts 2 containing one row of rectangular units U and two columns of rectangular units U, so as to meet the hoisting requirement of a lighter weight under medium-load hoisting; or the connecting part 2 comprising the two rectangular units U can be further split into the connecting part 2 comprising only one rectangular unit U, so that the requirements of light-load hoisting working conditions are met, and the waste of the bearing capacity of the arm support is reduced.

In some embodiments, as shown in fig. 5, the number of the boom bodies 10 is odd, the plurality of boom bodies 10 are divided into a plurality of groups and are spaced apart in one of the width direction and the height direction, one group of boom bodies 10 includes one boom body 10, the remaining groups of boom bodies 10 each include at least two boom bodies 10, and at least two boom bodies 10 are spaced apart in the other of the width direction and the height direction. And the outer ends of the arm support bodies 10 of each group are parallel and level, and the number and the layout of the rectangular units U are matched with the arm support bodies 10. For example, with the connecting member 2, the size of one rectangular unit U provided for each group alone is larger than the sum of the sizes of at least two rectangular units U provided for each group.

In the prior art, only even number of boom frames can be adopted, the embodiment can be flexibly assembled and deformed through the connecting part 2, is suitable for the condition of setting odd number of boom frames 10, and can enable the bearing capacity of the boom device to have more adjusting gears, so that the bearing capacity of the boom device is better matched with the hoisting working condition, the weight of the boom can be reduced, the bearing capacity is wasted, and the operation of hoisting equipment is more stable on the basis of meeting the hoisting requirement.

For example, as shown in fig. 5, the uppermost connecting member 2 includes four rectangular units U (U1-U4) arranged in two rows and two columns to meet the medium load hoisting requirement. On this basis, the two first connecting rods 221 between U1 and U2 can be removed, forming in the first row a rectangular unit U1 with a width covering the two rectangular units U3 and U4 of the second row, as appropriate for the case where three boom bodies 10 are provided; alternatively, the two first connecting rods 221 between U1 and U3 may be removed, forming a rectangular unit U1 in the first column that covers the width of the second column of two rectangular units U2 and U4, as may be appropriate for the case where three boom bodies 10 are provided.

Alternatively, a rectangular unit U5 with a width covering U1 and U2 may be added between the first row of rectangular units U1, U2 and the second row of rectangular units U3, U4 to accommodate the case where five cradles 10 are provided; or a rectangular unit U5 with a width covering U1 and U3 may be added between the first column of rectangular units U1, U3 and the second column of rectangular units U2, U4.

In some embodiments, as shown in fig. 3, the joint unit 21 includes a main body portion 21A having a rectangular cross section, the end portion of the connection rod 22 has a first joint 223, and the plurality of joint units 21 include: the first joint unit 211 is arranged at the corner of the frame structure, and two adjacent side walls of the first joint unit 211 are provided with ear plates 214.

The plurality of joint units 21 may optionally include: a second joint unit 212 and a third joint unit 213. The second joint unit 212 is arranged at the position except the corner part on the outer side edge of the frame structure, and three side walls of the second joint unit 212 are provided with ear plates 214; the third joint unit 213 is provided in an inner region of the frame structure, and four side walls of the third joint unit 213 are provided with ear plates 214.

The first joint 223 is hinged to the ear plate 214, for example, a hinge hole is formed in the ear plate 214, and the first joint 223 is of a fork-shaped structure and is detachably hinged to the ear plate 214 through a pin.

Taking as an example that the connecting member 2 of four rectangular units U is provided in fig. 3, the four rectangular units U are laid out in two rows and two columns. The plurality of joint units 21 includes four first joint units 211, eight second joint units 212, and four third joint units 213. Four first joint units 211 are arranged at the four corners of the frame structure, eight second joint units 212 are arranged at the corners of the four rectangular units U on the outer sides of the frame structure, and four third joint units 213 are arranged at the four corners of the central area.

The embodiment can form different frame structures by selecting different numbers and forms of the joint units 21 to make the frame structures adapt to the layout of the arm support body 10, so that the arm support device is flexible in change.

In some embodiments, as shown in fig. 1 and 3, the joint unit 21 includes a main body portion 21A, and a second joint 21B and a third joint 21C respectively connected to two ends of the main body portion 21A, in adjacent boom sections 1, a fourth joint 111 is provided at an outer end of the main chord 11 in one boom section 1, and a fifth joint is provided at an outer end of the main chord 11 in the other boom section 1, where the fourth joint 111 is hinged to the second joint 21B, and the fifth joint is hinged to the third joint 21C. The direction of the hinge axis of the second joint 21B and the third joint 21C may be the same or perpendicular to accommodate any joint at the outer end of the main chord 11.

This embodiment can conveniently realize the detachable connection of the two ends of the joint unit 21 with the main chord in the boom section 1.

In some embodiments, as shown in fig. 3, the plurality of tie bars 22 are spaced apart in two layers in the length direction. The structure can play a role in strengthening through the double-layer connecting rod 22, so that the connection between the adjacent arm support sections 1 is reliable, the deformation generated during the hoisting is reduced, the hoisting operation is more stable, and the arm support shaking is reduced.

In some embodiments, as shown in fig. 2, the arm support body 10 includes a plurality of arm sections 10 'arranged along the length direction, and the main chords 11 of the adjacent arm sections 10' are detachably connected. The number of the arm sections 10 'in the arm support body 10 can be determined according to the actual bearing capacity requirement, and each arm section 10' can be disassembled during transportation, so that the requirement on the transportation condition is further reduced. Alternatively, the boom body 10 may also comprise only one arm segment 10'.

In some embodiments, boom section 1 further comprises a stiffener connected between main chords 11 of adjacent boom bodies 10. Under the condition that the length of the arm support section 1 is longer, the bending strength and the integral rigidity of the arm support can be improved by arranging the reinforcing rods, the bearing capacity of the arm support can be improved, and deformation is prevented.

In some embodiments, as shown in fig. 6, the boom body 10 includes four main chords 11 and a plurality of connecting rods 12, the four main chords 11 are enclosed to form a structure with a quadrilateral end face, any adjacent main chords 11 are connected by a part of the connecting rods 12 in the plurality of connecting rods 12, and each connecting rod 12 in the plurality of connecting rods 12 is detachably connected between the adjacent main chords 11.

The main chord 11 may include one or more chords. By increasing the number of the chords in a single main chord 11, the bearing capacity of the boom device can be further improved on the basis of ensuring the bearing capacity of the boom device through the cross section shape and size design of the boom device.

The split assembly technology is fully utilized, the design idea of the traditional arm support device is broken through, the welded integral arm support is changed into the assembled combined arm support, all the rods in the arm support can be disassembled, and when the assembled arm support needs to be assembled, at least part of the main chord 11 and the connecting rod 12 can be selected from the rod library according to the use working condition of the arm support device and assembled to form the arm support device meeting the bearing capacity. In addition, the connecting part 2 can be assembled into different structures to meet the connection requirements among different boom sections 1, so that the boom device is more flexibly assembled, the adaptability of the boom device to the bearing capacity under different working conditions is improved, and the utilization rate of the boom device is improved.

When transportation is needed, integral transportation can be selected according to transportation conditions, or at least part of the rods in the main chord 11 and the connecting rod 12 can be disassembled, or even all the rods can be disassembled into scattered rods, so that the arm support device is not limited by transportation size and transportation weight any more, and transportation and transition are facilitated.

As shown in fig. 6, two rows of hinge seats 112 are circumferentially disposed on the side wall of the main chord 11, and are configured to be respectively hinged to the connecting rods 12 on two adjacent surfaces of the arm support body 10, and each row of hinge seats 112 includes a plurality of hinge seats 112 disposed at intervals along the length direction. For example, the cross section of the main chord 11 may be a circular tube, a rectangular tube, or the like, and when a rectangular rod is used, two rows of hinge seats 112 are respectively provided on two adjacent side walls of the main chord 11 to connect with the connecting rods 12 in the adjacent side of the boom body.

In the embodiment, the connecting rod 12 is connected with the main chord 11 in a hinged mode, so that the device is convenient to disassemble and assemble, higher installation and positioning precision can be realized, and the shaking amount of the arm support device during working is reduced. In addition, the connecting rod 12 and the main chord 11 may be connected by a fastener such as a bolt.

In some embodiments, as shown in fig. 6, in the plurality of connecting rods 12 between the adjacent main chords 11, the first ends of the adjacent connecting rods 12 are respectively connected to the two hinge holes of the same hinge seat 112 on one of the main chords 11, and the second ends of the adjacent connecting rods 12 are respectively connected to the adjacent hinge seats 112 on the other main chord 11.

The connection form enables the plurality of connecting rods 12 between the adjacent main chords 11 to form a continuous W-shaped structure, simplifies the connection structure between the common section of the adjacent connecting rods 12 and the main chords 11, and enables the first ends of the adjacent connecting rods 12 to be connected with the two hinge holes of the same hinge base 112, so that the adjacent connecting rods 12 can be independently installed, and the adjacent connecting rods 12 are in the same plane, thereby ensuring the structural strength of the boom body.

As shown in fig. 6, the plurality of connecting rods 12 on the same plane in the arm support body 10 includes: two first links 121 and a plurality of second links 122. The two first connecting rods 121 are respectively connected to the positions of the adjacent main chords 11 near the two ends, and the two first connecting rods 121 are perpendicular to the main chords 11. The plurality of second links 122 are sequentially disposed between the two first links 121 along the length direction of the main chord 11, and the plurality of second links 122 are disposed to be inclined with respect to the main chord 11. Wherein, the inclination directions of the adjacent second connecting rods 122 on the same plane are opposite; the two second links 122 at corresponding positions on the opposite surfaces are alternately arranged. This structure can improve the overall strength and rigidity of the boom body 10.

Specifically, the bearing capacity of the boom device may be changed as follows:

1. increasing the section size of the arm support section 1;

the principle of improving the bearing capacity of the arm support is as follows:

moment of inertia of arm support

Wherein: b is the width dimension of the section of the arm support section 1, and H is the height dimension of the section of the arm support section 1;

it can be seen that when the width B and the height H of the section of the boom section 1 are changed, the moment of inertia of the boom is increased, and the moment of inertia is a direct factor determining the bearing capacity of the boom, so that the bearing capacity of the boom device can be directly increased by changing the section size of the boom section 1.

2. The number of the arm support bodies 10 in the arm support section 1 is increased, namely, the single section can theoretically realize any number of single arm supports, double arm supports, triple arm supports, quadruple arm supports, quintuplet arm supports and the like, and the adjusting gears are more.

3. For the case that the boom section 1 includes a plurality of boom bodies 10, the center distance between adjacent boom bodies 10 may be increased;

I_x2＝8I_dg+2A²A_dg+2B²A_dg

I_y2＝8I_dg+2H²A_dg

A_dg-single main chord area;

I_dg-the moment of inertia of the single main chord;

a is the center distance of the double-arm frame body.

It can be known that increasing the number of the main chords 11 and increasing the center distance between the adjacent boom frames 10 can both improve the moment of inertia of the boom device, thereby improving the carrying capacity of the boom device.

From the above formula, it can also be seen that the inertia moment of the boom and the center distance between the adjacent boom frames 10 are in a square relationship, that is, for a multi-boom, increasing the distance between the boom frames 10 is more direct to improve the bearing capacity of the boom, and the effect is better. Meanwhile, because the connecting rods 12 are assembled, the purpose of increasing the center distance between the adjacent arm support bodies 10 can be achieved under the condition that the overall dimension of the whole arm support device is not changed by conveniently changing the length of the corresponding connecting rod 12 and reducing the section of a single arm support body 10.

The embodiment of the disclosure breaks through the thought limitation of the prior art, so that the transformation of the boom device can be simultaneously suitable for odd number boom bodies and even number boom bodies, the section shape and the size of the boom device can be randomly changed according to the hoisting working condition requirements, and therefore the bearing capacity of the boom device can be randomly adjusted according to the requirements. Moreover, the arm support device is simple to transform, different connecting parts 2 can be formed by increasing and decreasing the number, the size and the arrangement form of the joint units 21 and the connecting rods 22, the distance between different rectangular units U and the size of the rectangular units U can be realized through the connecting rods 22 with different lengths, so that different transformation requirements of the arm support device are met, and the component utilization rate is high.

Secondly, the present disclosure provides a hoisting device, including the boom apparatus of the above embodiment. The hoisting equipment can meet the requirements of different hoisting working conditions, not only can meet the requirements of an oversized hoisting working condition, but also can reduce the weight of the arm support under medium and small hoisting working conditions, improve the hoisting stability and fully utilize the bearing capacity of the arm support.

In some embodiments, the lifting apparatus comprises two boom devices, the two boom devices being arranged in parallel spaced apart relationship, or in an angled configuration to form an a-arm.

The boom device and the hoisting equipment provided by the present disclosure are described in detail above. The principles and embodiments of the present disclosure are explained herein using specific examples, which are set forth only to help understand the method and its core ideas of the present disclosure. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present disclosure without departing from the principle of the present disclosure, and such improvements and modifications also fall within the scope of the claims of the present disclosure.

Claims

1. A boom apparatus, comprising:

the cantilever crane device comprises a plurality of cantilever crane sections (1), wherein the cantilever crane sections (1) are sequentially arranged along the length direction of the cantilever crane device, each cantilever crane section (1) in the plurality of cantilever crane sections (1) comprises at least one cantilever crane body (10), and each cantilever crane body (10) comprises a plurality of main chords (11) and forms a space truss structure; and

the connecting component (2) is connected between adjacent arm support sections (1) in the arm support sections (1), the connecting component (2) comprises a plurality of joint units (21) and a plurality of connecting rods (22), each connecting rod (22) is detachably connected between the adjacent joint units (21) to form a frame structure in an assembling mode, the frame structure is matched with the layout of the at least one arm support body (10), and two ends of each joint unit (21) are detachably connected with the main chord (11) at the corresponding position in the adjacent arm support section (1) respectively.

2. Boom arrangement according to claim 1, characterized in that each boom section (1) comprises a plurality of boom bodies (10), and that the plurality of connecting rods (22) in the same connecting part (2) comprises:

the four first connecting rods (221) are enclosed to form a rectangular unit (U), the number of the rectangular units (U) is consistent with that of the arm support body (10), the rectangular units (U) are consistent with the size of a rectangle formed by the four main chords (11) of the arm support body (10), and each corner of each rectangular unit (U) is provided with one joint unit (21); and

a plurality of second connection bars (222), the second connection bars (222) being connected between the joint units (21) adjacent to each other in the adjacent rectangular units (U).

3. Boom arrangement according to claim 2, characterized in that the number of boom bodies (10) is even and arranged in a rectangular array, the number and layout of rectangular units (U) being adapted to the boom bodies (10).

4. The boom device according to claim 2, characterized in that the number of the boom bodies (10) is odd, a plurality of boom bodies (10) are divided into a plurality of groups and arranged at intervals, one group of boom bodies (10) comprises one boom body (10), the rest groups of boom bodies (10) comprise at least two boom bodies (10), the outer ends of the boom bodies (10) in each group are flush, and the number and the arrangement of the rectangular units (U) are adapted to the boom bodies (10).

5. The boom apparatus according to claim 1, characterized in that the joint unit (21) comprises a main body part (21A) having a rectangular cross section, the end of the connecting rod (22) has a first joint (223), and the plurality of joint units (21) comprises: the first joint unit (211) is arranged at the corner position of the frame structure, and two adjacent side walls of the first joint unit (211) are provided with lug plates (214);

the plurality of connector units (21) optionally comprises:

the second joint unit (212) is arranged at the position except the corner part on the outer side edge of the frame structure, and the ear plates (214) are arranged on three side walls of the second joint unit (212); and

a third joint unit (213) arranged in an inner region of the frame structure, the four side walls of the third joint unit (213) being provided with the ear plates (214);

wherein the first joint (223) is articulated with the ear plate (214).

6. The boom device according to claim 1, characterized in that the joint unit (21) comprises a main body part (21A) and a second joint (21B) and a third joint (21C) respectively connected to two ends of the main body part (21A), in adjacent boom sections (1), a fourth joint (111) is arranged at an outer end of the main chord (11) in one boom section (1), a fifth joint is arranged at an outer end of the main chord (11) in the other boom section (1), the fourth joint (111) is hinged to the second joint (21B), and the fifth joint is hinged to the third joint (21C).

7. Boom arrangement according to claim 1, characterized in that a number of connecting rods (22) are arranged in two layers at intervals in the length direction.

8. Boom arrangement according to claim 1, characterized in that the boom body (10) comprises a plurality of boom segments (10 ') arranged in the length direction, the main chords (11) of adjacent boom segments (10') being detachably connected.

9. Boom arrangement according to claim 1, characterized in that the boom section (1) further comprises a reinforcement bar connected between the main chords (11) of adjacent boom bodies (10).

10. The boom device according to any one of claims 1 to 9, characterized in that the boom body (10) comprises four main chords (11) and a plurality of connecting rods (12), the four main chords (11) enclose to form a structure with a quadrilateral end face, any adjacent main chords (11) are connected through a part of the connecting rods (12) in the plurality of connecting rods (12), and each connecting rod (12) in the plurality of connecting rods (12) is detachably connected between adjacent main chords (11).

11. Hoisting equipment, characterized by comprising the boom device of any one of claims 1 to 10.

12. The hoisting device of claim 11, comprising two of the boom assemblies, the two boom assemblies being spaced apart in parallel or arranged at an angle.