CN214570258U

CN214570258U - Internode connecting structure of horizontal cantilever type crane boom of tower crane

Info

Publication number: CN214570258U
Application number: CN202120173058.1U
Authority: CN
Inventors: 郭志康; 胡婷; 孙秋香; 李芳�; 石小飞; 谢海建
Original assignee: Kerun Electro Mechanical Engineering Co ltd
Current assignee: Kerun Electro Mechanical Engineering Co ltd
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2021-11-02
Anticipated expiration: 2031-01-22

Abstract

The utility model discloses a horizontal cantilever type jib loading boom's of tower crane internode connection structure belongs to hoisting machinery technical field. The internode connecting structure comprises double hinge pin plates arranged at two ends of two upper chords in front and rear adjacent jib sections, pin shafts transversely inserted into pin holes in the double hinge pin plates correspondingly matched with the front and rear adjacent jib sections, and stressed pressure plates fixed at two ends of the lower chords in the jib sections; the interface between the lower chords of the front and rear adjacent crane booms is only in pressing contact through the stressed pressing plate and is not connected. The utility model discloses change the connection structure that the upper and lower chord member between traditional jib loading boom festival all combined together through round pin axle or bolt, the replacement is for only the upper chord member through the round pin hub connection, and kneck between the lower chord member only through the structure that atress clamp plate extrusion contact and do not connect, have that the atress is clear and definite, convenient, simple structure, the preparation of being convenient for, safe and reliable, the advantage that economy is suitable for to the dress, can produce apparent economic benefits and social.

Description

Internode connecting structure of horizontal cantilever type crane boom of tower crane

Technical Field

The utility model belongs to the technical field of hoisting machinery, more specifically say and relate to a horizontal cantilever type jib loading boom of tower crane internode connection structure.

Background

The lifting arm of the tower crane is horizontally arranged, and the lifting equipment which changes the amplitude by the movement of a lifting trolley hung on the horizontal lifting arm is called a flat-arm crane, such as a construction crane, various lifting arm guys and a flat-head tower crane on the tower top.

Compared with a movable-arm crane, the flat-arm crane, particularly the flat-head crane, has the advantages of compact structure, light weight, high amplitude variation speed and convenience in mounting and dismounting, and is widely applied to engineering construction and construction processes in the fields of thermal power, hydropower, metallurgy, mines and the like.

The length of a horizontal cantilever type crane arm (mainly applied to a flat-head crane) of the guy-cable-free complete cantilever is generally 70-80 m, the length of each section is 9-11 m, about 8 sections, and the length of the head is 2-3 m. The main chords between two adjacent sections of the traditional horizontal cantilever type crane boom are all connected through pin shafts or bolts (see fig. 5 and 6 in detail), and the number of the main chords between each section is generally three or four, so that the number of the pin shafts or the bolts used when the sections of the traditional horizontal cantilever type crane boom are connected is large, labor and time are consumed during installation, and the disassembly is difficult; and the upper and lower main chords of adjacent sections are all connected through pins or bolts, so that the stress is undefined, uneven and low in safety.

Disclosure of Invention

The utility model discloses just provide a tower crane horizontal cantilever type jib loading boom's internode connection structure to the weak point that exists among the above-mentioned prior art. The utility model has the advantages of the atress is clear and definite, convenient, the simple structure of adorning, be convenient for preparation, safe and reliable, economy are suitable for, be fit for the wide application on the flat arm crane, can produce apparent economic benefits and social.

The purpose of the utility model can be realized by the following technical measures:

the utility model discloses an internode connection structure of a tower crane horizontal cantilever type jib loading boom, which comprises a double-hinge pin plate (after the pin shaft is inserted, the quick connection of two upper chords in the front and back adjacent jib loading boom joints can be realized, and the structure has the advantages of convenient assembly and high installation efficiency); the joints between the lower chords of the front and rear adjacent crane jib sections are only in extrusion contact without connection through the stressed pressing plates (because the lower chords need to bear pressure instead of tension, the structure which is only in contact without connection is adopted, the stressed requirement is met, safety and reliability are achieved, constraint and restraint of excessive connection are reduced, the structure is greatly simplified, pin shafts and bolt connection are greatly reduced, the installation and the disassembly are convenient, and the cost is saved).

The utility model discloses in the internal diameter of pinhole and the diameter phase-match of round pin axle (be convenient for wear the dress round pin axle smoothly).

The utility model discloses in the jib loading boom festival connects into the truss structure that the cross section is triangle-shaped for falling through web member two upper chords that are parallel to each other and a lower chord (simple structure is stable, is fit for less tonnage, jib loading boom for complete cantilever type tower crane, light in weight, and economic nature is good).

The utility model discloses in the jib section is connected into the truss structure that the cross section is the square through web member two upper chords that are parallel to each other and two lower chords (rigidity is big, especially more is fit for the tower crane of big tonnage).

The design principle of the utility model is as follows:

the utility model discloses change the connection structure that the upper and lower chord member between traditional jib loading boom festival all combined together through round pin axle or bolt, the replacement is the structure that only upper chord member passes through the round pin hub connection, and kneck between the lower chord member only does not connect through atress clamp plate extrusion contact-promptly the lower chord member relies on the dead weight pressure and the frictional force of jib loading boom festival to realize the contact and combine, does not need rethread round pin axle or bolt to connect. More specifically, the utility model discloses an in every jib loading boom festival, bear the pulling force by two articulated continuous upper chord members, bear the shear force by the round pin axle, bear pressure by the lower chord member that only contacts and not connect, each part atress is clear and definite. The interface between the middle and lower chords of the utility model is designed into a structure which is not connected only by the extrusion contact of the stressed pressing plate, thereby not only meeting the stress requirement, but also being safe and reliable; the restraint and the containment of excessive connection are reduced, and the structure is greatly simplified; and the number of pin shafts and bolt connections is greatly reduced, so that the installation and the disassembly are convenient, and the cost is saved. Therefore the utility model discloses a connection structure has that the atress is clear and definite, convenient, the simple structure of adorning, the preparation of being convenient for, safe and reliable, the advantage that economy is suitable for, has that the atress is clear and definite, convenient, the simple structure of adorning, the preparation of being convenient for, safe and reliable, economy are suitable for, is fit for the wide application on flat-arm crane, can produce apparent economic benefits and social.

The utility model has the advantages of as follows:

the utility model discloses change the connection structure that the upper and lower chord member between traditional jib loading boom festival all combined together through round pin axle or bolt, the replacement is for only the upper chord member through the round pin hub connection, and kneck between the lower chord member only through the atress clamp plate extrusion contact and the structure that does not connect, have that the atress is clear and definite, convenient, simple structure, the preparation of being convenient for, safe and reliable, the advantage that economy is suitable for to adorn, be fit for wide application on flat arm crane, can produce apparent economic benefits and social.

Will the utility model discloses wide application can produce apparent economic benefits and social on the flat-arm crane, embodies as follows:

taking a flat-arm crane with a lifting capacity of 100 tons as an example, the boom length is 80 m. The number of large pin shafts can be reduced by 8, which is about 8000 yuan; the manufacturing of 8-group double-combination hinge pin plate can be reduced, and the cost is about 15000 yuan; the time for mounting and dismounting can be saved by 2 days, and the mounting and labor cost of the auxiliary crane can be reduced by 25000 yuan; the whole life cycle of the equipment is calculated according to 16 years and 10 projects, and the cost is saved by about 28 ten thousand yuan.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a schematic view of the internode structure of the crane boom of the present invention.

Fig. 4 is a top view of fig. 3.

Fig. 5 is a schematic view of an internode connection structure of a conventional horizontal cantilevered boom.

Fig. 6 is a schematic view of an internode structure of a conventional horizontal cantilevered boom.

The serial numbers of the parts in the figure illustrate that 1, a jib section, 2, an upper chord, 3, a double hinge pin plate, 3-1, a pin hole, 4, a pin shaft, 3-1, a pin hole, 5, a lower chord, 6, a stress pressure plate, 7 and a web member.

Detailed Description

The present invention will be further described with reference to the accompanying drawings:

example one

As shown in fig. 1 to 4, the internode connection structure of the horizontal cantilever type jib loading boom of the tower crane according to the first embodiment comprises double hinge pin plates 3 arranged at two ends of two upper chords 2 in front and rear adjacent jib sections 1 (after the pin shafts 4 are inserted, the quick connection of the two upper chords 2 in the front and rear adjacent jib sections 1 can be realized, and the advantages of convenient assembly and high installation efficiency are achieved; the joints between the lower chords 5 of the front and rear adjacent jib sections 1 are only in extrusion contact with each other through the stressed pressing plates 6 and are not connected (because the lower chords 5 need to bear pressure instead of tension, the structure which is only in contact with each other but not connected is adopted, the stressed requirements are met, the safety and the reliability are realized, the constraint and the restraint of excessive connection are reduced, the structure is greatly simplified, the connection of pin shafts and bolts is greatly reduced, the installation and the disassembly are convenient, and the cost is saved).

In the utility model, the inner diameter of the pin hole 3-1 is matched with the diameter of the pin shaft 4 (which is convenient for smoothly mounting the pin shaft 4).

The utility model discloses in jib festival 1 is the truss structure that the cross section is inverted triangle-shaped through web member 7 two upper chords 2 and a lower chord 5 that will be parallel to each other (simple structure is stable, is fit for less tonnage, jib loading boom and is complete cantilever type tower crane, light in weight, and economic nature is good).

Example two

The difference between the second embodiment and the first embodiment is that: in the second embodiment, the boom segment 1 is a truss structure (with large rigidity, especially suitable for large-tonnage tower cranes) with a square cross section formed by connecting two upper chords 2 and two lower chords 5 which are parallel to each other through web members 7. In the first embodiment, each jib section 1 is provided with a lower chord 5, and the cross section of the jib section 1 is in an inverted triangle shape.

The utility model discloses a concrete in service behavior as follows:

firstly, according to the tonnage, the required number of boom sections 1 with the cross section of an inverted triangular truss structure (in the first embodiment, the structure is simple and stable, and particularly suitable for tower cranes with small tonnage) or the boom sections 1 with the cross section of a square truss structure (with high rigidity, and particularly suitable for tower cranes with large tonnage) are manufactured, that is, two upper chords 2 and two lower chords 5 (the number of the lower chords 5 is 1 in the first embodiment, and the number of the lower chords 5 is 2 in the second embodiment) which are parallel to each other are connected into the truss structure through web members 7. And then, the two ends of the two upper chords 2 of each jib section 1 are fixedly provided with an upper hinge pin plate 3, and the two ends of the lower chord 5 of each jib section 1 are fixedly provided with an upper stress pressure plate 6. And then, inserting and embedding the double-hinge pin plates 3 at the joints of two groups of upper chords 2 corresponding to the front and rear adjacent jib sections 1 together, enabling the pin holes 3-1 in each pair of paired double-hinge pin plates 3 to be opposite, and inserting the pin shafts 4 into the pin holes 3-1 with opposite positions. And finally, adjusting the positions of stress pressing plates 6 at the joints of the front and rear adjacent lower chords 5 to align and press, contacting and attaching the stress pressing plates together, wherein the lower chords 5 realize contact type combination by means of the self-weight pressure and the friction force of the crane jib joint without connecting through pin shafts or bolts. And finally, starting the tower crane to carry out normal hoisting operation. In the normal hoisting operation process, two upper chords 2 which are hinged and connected bear tension, a pin shaft 4 bears shearing force, a lower chord 5 which is only contacted and not connected bears pressure, and all parts are stressed clearly; in addition, the interface between the middle and lower chords 5 of the utility model is designed into a structure which is not connected only by the extrusion contact of the stressed pressing plate 6, thereby not only meeting the stress requirement, but also being safe and reliable; the restraint and the containment of excessive connection are reduced, and the structure is greatly simplified; and the number of pin shafts and bolt connections is greatly reduced, so that the installation and the disassembly are convenient, and the cost is saved.

Claims

1. The utility model provides a tower crane horizontal cantilever type jib loading boom's internode connection structure which characterized in that: the internode connecting structure comprises double hinge pin plates (3) arranged at two ends of two upper chords (2) in front and rear adjacent jib sections (1), pin shafts (4) transversely inserted into pin holes (3-1) in the double hinge pin plates correspondingly matched with the front and rear adjacent jib sections, and stressed pressure plates (6) fixed at two ends of a lower chord (5) in the jib section (1); the interface between the lower chords (5) of the front and rear adjacent jib sections (1) is only in pressing contact with the stressed pressure plate (6) and is not connected.

2. The internode connection structure of a horizontal cantilever crane boom of a tower crane according to claim 1, characterized in that: the inner diameter of the pin hole (3-1) is matched with the diameter of the pin shaft (4).

3. The internode connection structure of a horizontal cantilever crane boom of a tower crane according to claim 1, characterized in that: the crane arm section (1) is a truss structure with an inverted triangular cross section formed by connecting two parallel upper chords (2) and a lower chord (5) through a web member (7).

4. The internode connection structure of a horizontal cantilever crane boom of a tower crane according to claim 1, characterized in that: the crane arm section (1) is a truss structure with a square cross section formed by connecting two upper chords (2) and two lower chords (5) which are parallel to each other through web members (7).