Sectional connecting structure of tower top of movable arm tower

Abstract

The sectional connecting structure comprises a tower top root section and a tower top end section which are connected with each other, a lower connecting plate and an upper connecting plate are formed at the joint of the tower top root section and the tower top end section respectively, and the lower connecting plate and the upper connecting plate are attached to each other for supporting. A plurality of bolts are connected between the lower connecting plate and the upper connecting plate, the plurality of bolts are symmetrically arranged, the top surface of the lower connecting plate protrudes upwards to form a plurality of positioning pins, and the bottom surface of the upper connecting plate is concavely arranged upwards to form positioning holes into which the positioning pins are correspondingly inserted. According to the utility model, the tower top is divided into two parts so as to be convenient to transport, and the two parts can be quickly and reliably connected into an integral part before the tower crane is mounted.

Description

Technical Field

[0001] The present application relates to a tower crane mechanism, and in particular to a segmented connection structure of a boom tower top. Background Art

[0002] Tower cranes are widely used in construction, bridges, power and other fields. In recent years, the trend of flat top and boom has become more and more obvious, and it has also developed in the direction of large-scale and intelligent. Our company has developed a series of large flat top towers and boom towers in response to the market. Tower cranes are mainly affected by real estate and infrastructure, and are a highly cyclical industry. And accompanied by the continuous breakthroughs of major domestic manufacturers in technology, quality, large-scale, intelligent, and high reliability. Going out and expanding exports to make up for the decline and fluctuations in the domestic market has become an inevitable choice. The increase in the size and weight of structural parts brought about by the large-scale tower cranes has caused difficulties in the transportation of export products. There are different types of containers, such as standard containers, high containers, open top containers, and frame containers. Among them, the transportation cost of standard containers is the lowest, and the transportation cost of frame containers is much higher. When designing, it is necessary to consider as much as possible that the components can be transported in standard containers, which is conducive to reducing the shipping and transportation costs and the transshipment costs of customers. In the development of our company's large boom tower MCR615, it was found that the length of the tower top exceeded the standard, and the total length reached 14 meters, which could not be put into a standard container with a length of only 12m. Utility Model Content

[0003] The utility model aims to provide a segmented connection structure of a boom tower top, which divides the tower top into two parts for easy transportation, and before installing the tower crane, the two parts can be quickly and reliably connected into an integral component.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions.

[0005] An embodiment of the present application discloses a segmented connection structure of a boom tower top, comprising a tower top root section and a tower top section that are connected to each other, wherein a lower connecting plate and an upper connecting plate are respectively formed at the connection between the tower top root section and the tower top section, wherein the lower connecting plate and the upper connecting plate are fitted and supported with each other, wherein a plurality of bolts are connected between the lower connecting plate and the upper connecting plate, wherein the plurality of bolts are symmetrically arranged, wherein a plurality of positioning pins are formed by protruding upward from the top surface of the lower connecting plate, and a positioning hole corresponding to the insertion of each positioning pin is formed by recessing upward from the bottom surface of the upper connecting plate.

[0006] Preferably, in the above-mentioned segmented connection structure of the boom tower top, four positioning pins and four positioning holes are respectively provided, and two of them are relatively symmetrically arranged.

[0007] Preferably, in the above-mentioned segmented connection structure of the boom tower top, there are 12 bolts, which are symmetrically arranged in two groups, each group is provided with two symmetrical columns, and each column is provided with 3 bolts.

[0008] Preferably, in the segmented connection structure of the above-mentioned boom tower top, the tower top root section adopts a spatial truss structure, the main chord is made of square steel pipe, and the web is made of round steel pipe; the tower top section adopts a plane truss structure, the main chord is made of H-shaped steel, and the web is made of round steel pipe.

[0009] Preferably, in the above-mentioned segmented connection structure of the boom tower top, the length of the tower top root section is 11.8 meters, and the length of the tower top section is 2.2 meters.

[0010] The total length of the top of our company's MCR615 boom tower reaches 14 meters, while the inner length of a 40-foot international standard container is only 12 meters, and the entire tower top cannot be loaded into a 40-foot international standard container. In order to facilitate container transportation, the tower top is now divided into two parts: a 11.8-meter-long tower top root section and a 2.2-meter-long tower top section. Compared with the prior art, the advantage of the utility model is that the entire tower top assembly can be loaded into a 40-foot international standard container, and the remaining space in the container can also be used to load other components, greatly reducing transportation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 The figure is a three-dimensional diagram of the segmented connection structure of the boom tower top in the embodiment of the utility model;

[0013] Figure 2 The figure shows a disassembled view of the segmented connection structure of the boom tower top in the embodiment of the utility model;

[0014] Figure 3 The figure shows a partial view of the segmented connection structure of the boom tower top in the embodiment of the utility model;

[0015] Figure 4 for Figure 3 Split diagram of . DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to describe the technical solutions in the embodiments of the utility model in detail. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] Combination Figure 1-4 As shown, the segmented connection structure 100 of the top of the boom tower includes a tower top root section 110 and a tower top section 120 connected to each other, and the connection between the tower top root section 110 and the tower top section 120 is respectively formed with a lower connecting plate 111 and an upper connecting plate 121, the lower connecting plate 111 and the upper connecting plate 121 are mutually supported, and a plurality of bolts 130 are connected between the lower connecting plate 111 and the upper connecting plate 121, and the plurality of bolts 130 are symmetrically arranged, and the top surface of the lower connecting plate 111 protrudes upward to form a plurality of positioning pins 112, and the bottom surface of the upper connecting plate 121 is recessed upward to form a positioning hole 122 corresponding to each positioning pin 112. Four positioning pins 112 and four positioning holes 122 are respectively arranged, and two are relatively symmetrically arranged. Twelve bolts 130 are arranged, which are symmetrically arranged in two groups, and each group is arranged with two symmetrical columns, and each column is arranged with three bolts. The tower top root section 110 adopts a spatial truss structure, the main chord is made of square steel pipe, and the web is made of round steel pipe; the tower top section 120 adopts a plane truss structure, the main chord is made of H-shaped steel, and the web is made of round steel pipe. The tower top root section 110 is 11.8 meters long, and the tower top section 120 is 2.2 meters long.

[0018] In this embodiment, an upper connecting plate is welded on the top section of the tower, and a lower connecting plate is welded on the root section of the tower. The top section of the tower and the root section of the tower are connected by 12 screws, nuts and flat washers. The precise positioning of the two components is achieved by inserting 4 locating pins on the lower connecting plate of the root section of the tower into the 4 locating holes on the upper connecting plate of the top section of the tower. The screw adopts a high strength grade of 10.9, and the nut adopts a high strength grade of 10. The upper connecting plate has some ribs to disperse stress, and the lower connecting plate has a long "tail" to avoid stress concentration. The entire connection structure is simple, reliable, and quick to connect, which well solves the connection problem of the root section and the end section of the tower top of the MCR615 boom tower.

[0019] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0020] The above is only a specific implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A segmented connection structure of a boom tower top, characterized in that: It includes a tower top root section and a tower top section which are connected to each other, wherein a lower connecting plate and an upper connecting plate are respectively formed at the connection between the tower top root section and the tower top section, wherein the lower connecting plate and the upper connecting plate are fitted and supported with each other, and a plurality of bolts are connected between the lower connecting plate and the upper connecting plate, wherein the plurality of bolts are symmetrically arranged, and a plurality of positioning pins are formed on the top surface of the lower connecting plate protruding upward, and a positioning hole corresponding to the insertion of each positioning pin is formed on the bottom surface of the upper connecting plate.

2. The segmented connection structure of the boom tower top according to claim 1, characterized in that: The number of the positioning pins and the number of the positioning holes are four, respectively, and they are arranged symmetrically in pairs.

3. The segmented connection structure of the boom tower top according to claim 1, characterized in that: The bolts are provided in 12 numbers and are symmetrically arranged in two groups. Each group is provided with two symmetrical columns, and each column is provided with 3 bolts.

4. The segmented connection structure of the boom tower top according to claim 1, characterized in that: The tower top root section adopts a spatial truss structure, the main chord is made of square steel pipes, and the web is made of round steel pipes; the tower top section adopts a plane truss structure, the main chord is made of H-shaped steel, and the web is made of round steel pipes.

5. The segmented connection structure of the boom tower top according to claim 1, characterized in that: The length of the tower top root section is 11.8 meters, and the length of the tower top section is 2.2 meters.

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