Installation method of novel upper and lower fragmentation type inverted triangular double-arm parallel connection cantilever crane

Abstract

The invention relates to an installation method of a novel upper and lower piece type inverted triangular double-arm parallel arm support, which comprises the following steps: preparing four arm supports of the novel upper and lower piece type inverted triangular double-arm parallel arm support, including a left upper main structure, a left lower main structure, a right lower main structure and a right upper main structure, an inclined fixed support rod connecting lug plate and a transverse fixed support rod connecting lug plate are welded on the left lower main structure and the right lower main structure; placing the left lower main structure and the right lower main structure according to a specified distance and direction; the lower fixing supporting rod, the transverse fixing supporting rod and the inclined fixing supporting rod are sequentially installed, and the two inverted triangle lower main structures are connected into a stable whole; mounting a left upper main structure or a right upper main structure; the remaining upper main structure is installed; mounting an upper connecting structure; and the transverse fixing supporting rod and the inclined fixing supporting rod are dismantled, and installation is completed. According to the invention, the safety and reliability in the installation process are ensured. The installation sequence of all the structures is specified, and the installation speed of the cantilever crane is greatly increased.

Description

Technical Field

[0001] The invention relates to an installation method for a novel upper and lower segmented inverted triangle double-arm parallel boom, belonging to the technical field of tower cranes. Background Art

[0002] The main structure of the existing double-arm structure in the industry is generally divided into two parts, left and right. There is no problem of center of gravity offset during installation of this structure, and only the double arms need to be assembled. However, for super-large tower cranes with larger tonnage, due to the large size and weight of the arm structure, in order to facilitate transportation and reduce the weight and size of each main structure unit, the arm is designed as an upper and lower split double-arm parallel arm structure, that is, each arm is composed of two single arms (arm section left + arm section right), and each single arm is composed of two upper and lower main structure units (upper structure + lower structure). At this time, each arm is composed of 4 main structure units. For this type of upper and lower segmented inverted triangle double-arm parallel boom composed of four main structural units, during the assembly of the boom structures, the center of gravity of the overall structure will change with each additional structure. In addition, since the inverted triangle boom is wide at the upper part and narrow at the lower part, if certain measures are not taken during the installation process, the boom will tip over as a whole no matter in which order it is installed, and there will be great safety hazards in the installation. Once the upper and lower segmented inverted triangle double-arm parallel boom is used, it usually means that the corresponding tower crane has a large tonnage, so the tower crane will have multiple upper and lower segmented inverted triangle structures. Summary of the invention

[0003] In order to ensure the smooth assembly of the boom, it is necessary to invent an installation method for the upper and lower segmented inverted triangle double-arm parallel boom, and this method should also be universal to cope with multiple booms of different sizes and weights.

[0004] The present invention is realized by the following technical scheme: a method for installing a novel upper and lower segmented inverted triangle double-arm parallel boom, comprising the steps of: Step 1: Prepare four booms of the new upper and lower segmented inverted triangle double-arm parallel boom, including the upper left main structure, the lower left main structure, the lower right main structure and the upper right main structure, and weld the oblique fixed strut connecting ear plates and the horizontal fixed strut connecting ear plates on the lower left main structure and the lower right main structure; Step 2: Place the lower left main structure and the lower right main structure according to the specified spacing and direction; Step 3: Install the lower fixed brace, the horizontal fixed brace and the oblique fixed brace in sequence to connect the two inverted triangle lower main structures into a stable whole; Step 4: Install the upper left main structure or the upper right main structure; Step 5: Install the remaining upper main structure; Step 6: Install the upper connection structure; Step 7: Remove the horizontal and diagonal fixed braces to complete the installation.

[0005] When the upper left main structure or the upper right main structure is installed in step 4, the upper left main structure or the upper right main structure is fixed to the lower left main structure or the lower right main structure by bolts and pins.

[0006] The horizontal fixed strut includes an adjusting screw I, a connecting rod and a connecting ear plate. The adjusting screw I is used to adjust the length of the strut. The adjustable length range of the strut is determined according to the hole spacing of the horizontal fixed strut connecting ear plates on the lower left main structure and the lower right main structure of different booms. First, the maximum hole spacing and the minimum hole spacing between the horizontal fixed strut connecting ear plates on the lower left main structure and the lower right main structure of all double-arm parallel booms in the same batch are determined, and then the length of the adjusting screw I is determined.

[0007] The connecting rod plays a supporting role, the length of the connecting rod is a fixed value, and the support rod is connected with the cross bar fixed support rod connecting ear plate and the oblique fixed support rod through the connecting ear plate.

[0008] The oblique fixed strut comprises a long connecting rod, an adjusting screw II and a short connecting rod. The adjustment range of the oblique fixed strut is determined according to the hole distance between the connecting ear plate after the horizontal fixed strut is connected on different booms and the connecting ear plate of the diagonal oblique fixed strut.

[0009] Obliquely fixed strut connecting ear plates are welded on symmetrical positions of the left lower main structure and the right lower main structure, but one obliquely fixed strut connecting ear plate is idle during installation and use.

[0010] The short connecting rod of the oblique fixed strut is connected with the oblique fixed strut connecting ear plate.

[0011] The beneficial effects of the present invention are as follows: a fixed support rod is arranged to fix the two lower main structures into a stable integral structure, thereby ensuring safety and reliability during the installation process. The fixed support rod is a structure with adjustable telescopic length, thereby ensuring the versatility of the support rod. The installation sequence of each structure is specified, wherein the two lower main structures are fixed first and then the two upper main structures are installed in sequence, thereby ensuring the reliability and safety of the installation and greatly improving the installation speed of the boom. The support rod is removed after the boom is installed for use by other booms, which not only does not affect the installation of other auxiliary structures, but also reduces the weight of the boom. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention is further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 It is the installation flow chart of the present invention; Figure 2 It is a structural schematic diagram of the upper and lower segmented inverted triangle double-arm parallel boom of the present invention; Figure 3 It is a schematic diagram of the stable connection of the two lower main structures of the present invention; Figure 4 It is a schematic diagram of the installation of the main structure of the present invention; Figure 5 This is a schematic diagram of the arm support installation of the present invention; Figure 6 It is a schematic diagram of the structure of the transverse fixed support rod of the present invention; Figure 7 It is a structural schematic diagram of the oblique fixed support rod of the present invention.

[0014] In the figure: 1. upper left main structure; 2. lower left main structure; 3. lower right main structure; 4. upper right main structure; 5. oblique fixed struts connecting ear plates; 6. transverse fixed struts connecting ear plates; 7. lower fixed struts; 8. transverse fixed struts; 9. oblique fixed struts; 10. upper connecting structure; 11. adjusting screw rod I; 12. connecting rod; 13. connecting ear plates; 14. long connecting rod; 15. adjusting screw rod II; 16. short connecting rod. DETAILED DESCRIPTION

[0015] like Figures 1 to 5 The installation method of a novel upper and lower segmented inverted triangle double-arm parallel boom shown in the figure comprises the following steps: Step 1: prepare four booms of the new upper and lower segmented inverted triangle double-arm parallel boom, including an upper left main structure 1, a lower left main structure 2, a lower right main structure 3 and an upper right main structure 4, and weld oblique fixed strut connecting ear plates 5 and horizontal fixed strut connecting ear plates 6 on the lower left main structure 2 and the lower right main structure 3; Step 2: Place the lower left main structure 2 and the lower right main structure 3 according to the specified spacing and direction; Step 3: Install the lower fixed strut 7, the horizontal fixed strut 8 and the oblique fixed strut 9 in sequence to connect the two inverted triangle lower main structures into a stable whole; Step 4: Install the upper left main structure 1 or the upper right main structure 4; Step 5: Install the remaining upper main structure; Step 6: Install the upper connecting structure 10. At this time, the whole structure is a stable and symmetrical large inverted triangle structure. Step 7: Remove the horizontal fixed brace 8 and the diagonal fixed brace 9 to complete the installation.

[0016] When the upper left main structure 1 or the upper right main structure 4 is installed in step 4, the upper left main structure 1 or the upper right main structure 4 is fixed to the lower left main structure 2 or the lower right main structure 3 by bolts and pins.

[0017] like Figure 6As shown, the transverse fixed strut 8 includes an adjusting screw Ⅰ11, a connecting rod 12 and a connecting ear plate 13. The adjusting screw Ⅰ11 is used to adjust the length of the strut. The adjustable length range of the strut is determined according to the hole spacing of the transverse fixed strut connecting ear plates 6 on the lower left main structure 2 and the lower right main structure 3 of different booms. Usually, the center distance between the left and right arms of the double-arm parallel boom is a fixed value. However, due to the different specifications of the rods connected to the strut connecting ear plates on different boom sections, the hole spacing of the strut connecting ear plates on the left and right arms of different boom sections is different. First, the maximum hole spacing and the minimum hole spacing between the transverse fixed strut connecting ear plates 6 on the lower left main structure 2 and the lower right main structure 3 of all double-arm parallel booms in the same batch are determined, and then the length of the adjusting screw Ⅰ11 is determined.

[0018] The connecting rod 12 plays a supporting role, and the length of the connecting rod 12 is a fixed value. The support rod is connected to the cross bar fixed support rod connecting ear plate 6 and the oblique fixed support rod 9 through the connecting ear plate 13.

[0019] like Figure 7 As shown, the oblique fixed strut 9 includes a long connecting rod 14, an adjusting screw II 15 and a short connecting rod 16. The adjustment range of the oblique fixed strut 9 is determined according to the hole distance between the connecting ear plate 13 after the horizontal fixed strut 8 is connected on different arms and the diagonal oblique fixed strut connecting ear plate 5.

[0020] The obliquely fixed strut connecting ear plates 5 are welded on the symmetrical positions of the left lower main structure 2 and the right lower main structure 3, but one obliquely fixed strut connecting ear plate 5 is idle during installation and use.

[0021] The short connecting rod 16 of the oblique fixed strut 9 is connected to the oblique fixed strut connecting ear plate 5, so that the workers can adjust the length of the strut on the ground.

[0022] The boom structure of the upper and lower segmented inverted triangle double-arm parallel boom consists of two single arms of inverted triangle structure, and the left and right boom sections are assembled. Each single arm is a boom composed of two upper and lower main structural units, an upper structure and a lower structure.

Claims

1. A new type of installation method for an upper and lower split inverted triangle double-arm parallel boom, characterized in that: Includes steps: Step 1: Prepare four booms of the novel upper and lower segmented inverted triangle double-arm parallel boom, including an upper left main structure (1), a lower left main structure (2), a lower right main structure (3) and an upper right main structure (4), and weld an oblique fixed brace connecting ear plate (5) and a horizontal fixed brace connecting ear plate (6) on the lower left main structure (2) and the lower right main structure (3); Step 2: Place the lower left main structure (2) and the lower right main structure (3) according to the specified spacing and direction; Step 3: Install the lower fixed strut (7), the horizontal fixed strut (8) and the oblique fixed strut (9) in sequence to connect the two inverted triangle lower main structures into a stable whole; Step 4: Install the upper left main structure (1) or the upper right main structure (4); Step 5: Install the remaining upper main structure; Step 6: Install the upper connecting structure (10); Step 7: Remove the horizontal fixing brace (8) and the diagonal fixing brace (9) to complete the installation.

2. The installation method of the novel upper and lower segmented inverted triangle double-arm parallel boom according to claim 1 is characterized by: When the upper left main structure (1) or the upper right main structure (4) is installed in step 4, the upper left main structure (1) or the upper right main structure (4) is fixed to the lower left main structure (2) or the lower right main structure (3) by bolts and pins.

3. The installation method of the novel upper and lower segmented inverted triangle double-arm parallel boom according to claim 1 is characterized by: The transverse fixed strut (8) comprises an adjusting screw rod I (11), a connecting rod (12) and a connecting ear plate (13). The adjusting screw rod I (11) is used to adjust the length of the strut. The adjustable length range of the strut is determined according to the hole spacing of the transverse fixed strut connecting ear plates (6) on the left lower main structure (2) and the right lower main structure (3) of different booms. First, the maximum hole spacing and the minimum hole spacing between the transverse fixed strut connecting ear plates (6) on the left lower main structure (2) and the right lower main structure (3) of all the double-arm parallel booms in the same batch are determined, and then the length of the adjusting screw rod I (11) is determined.

4. The installation method of the novel upper and lower segmented inverted triangle double-arm parallel boom according to claim 3 is characterized by: The connecting rod (12) plays a supporting role. The length of the connecting rod (12) is a fixed value. The support rod is connected to the crossbar fixed support rod connecting ear plate (6) and the oblique fixed support rod (9) through the connecting ear plate (13).

5. The installation method of the novel upper and lower segmented inverted triangle double-arm parallel boom according to claim 1 is characterized by: The oblique fixed strut (9) comprises a long connecting rod (14), an adjusting screw II (15) and a short connecting rod (16). The adjustment range of the oblique fixed strut (9) is determined according to the hole distance between the connecting ear plate (13) after connecting the horizontal fixed strut (8) on different arm frames and the connecting ear plate (5) of the diagonal oblique fixed strut.

6. The installation method of the novel upper and lower segmented inverted triangle double-arm parallel boom according to claim 1 is characterized by: The oblique fixed strut connecting ear plates (5) are welded to the symmetrical positions of the left lower main structure (2) and the right lower main structure (3), but one oblique fixed strut connecting ear plate (5) is idle during installation and use.

7. The installation method of the novel upper and lower segmented inverted triangle double-arm parallel boom according to claim 5 is characterized by: The short connecting rod (16) of the oblique fixed strut (9) is connected to the oblique fixed strut connecting ear plate (5).

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