A method for installing a boom and a tripod for changing the lifting height

Abstract

The present invention provides a method for installing a boom and a tripod for changing the lifting height. First, a connecting ear is welded on the top of a heightening module, and then the heightening module is welded on a rotating platform, so that the two heightening modules are symmetrical about the central axis and the distance between the centers of the two heightening modules is equal to the distance between the two lifting ears on the boom. Then, the distance from the center of the second through hole to the intersection of the vertical line and the horizontal line is measured, and a connecting rod is welded to the end of the rear support rod of the tripod, so that the distance from the center of the fourth through hole on the connecting ring to the welding point of the rear support rod and the connecting rod is equal to the distance from the center of the second through hole to the intersection of the vertical line and the horizontal line. Finally, the boom and the tripod are respectively installed on the rotating platform. The present invention can ensure that the tripod and the heightening module after the height is changed are accurately assembled, and the method is reliable and simple to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of cranes, and in particular to a method for installing a boom and a tripod for changing the lifting height. Background Art

[0002] In existing large-scale operating machinery and equipment, such as winches and cranes, wire ropes are often required to lift objects. For cranes, in actual applications, since the length of the object is almost the same as the originally designed boom length, in order to ensure the safety of the lifting operation, the lifting height of the boom needs to be changed to meet the lifting height requirements.

[0003] like Figure 1 As shown, the length of the crane's boom 1' is slewing, and the height of the platform base 2' is fixed. The lifting height of the boom and the tripod can be increased by providing a heightening module at the bottom of the platform base 2'. However, on the one hand, due to the heavy weight of the platform base, it is difficult to drive the platform base to rise. On the other hand, after the height of the platform base is increased, the center of gravity of the platform base moves upward, which makes the platform base prone to tipping, and thus the reliability of increasing the lifting height cannot be ensured. Summary of the Invention

[0004] The object of the present invention is to provide a method for installing a boom and a tripod with a variable lifting height, which can ensure that the tripod and the heightening module are accurately assembled after the height is changed, and the method is reliable and easy to operate.

[0005] To achieve the above purpose, a method for installing a boom and a tripod with a variable lifting height is provided, wherein the boom and the tripod are installed on a base through a heightening module;

[0006] The following steps are involved:

[0007] S1 welds the connecting ear to the top of the heightening module;

[0008] S2 takes the central axis of the rotary platform as the reference, and then welds the heightening module to the rotary platform so that the two heightening modules are symmetrical about the central axis and the distance between the centers of the two heightening modules is equal to the distance between the two lifting ears on the boom;

[0009] S3: In the plane where the connecting ear is located, draw a vertical line through the center of the second through hole on the connecting ear and a horizontal line through the center of the third through hole on the fixing base, and then measure the distance from the center of the second through hole to the intersection of the vertical and horizontal lines;

[0010] S4: Fix the angle between the front and rear struts, remove the connecting ring 1 from the end of the rear strut, then weld a connecting rod with a diameter that matches the rear strut to the end of the rear strut, and weld the connecting ring 1 to the connecting rod so that the distance from the center of the fourth through hole on the connecting ring 1 to the weld between the rear strut and the connecting rod is equal to the distance from the center of the second through hole to the intersection of the vertical line and the horizontal line;

[0011] S5: Use a crane to lift the tripod so that the second connecting ring at the end of the front support rod is aligned with the second through hole on the connecting ear and fixed, and the first connecting ring at the end of the rear support rod is aligned with the third through hole on the base and fixed;

[0012] S6: Use a crane to lift the boom, align the sixth through hole on the lifting ear at the base of the boom with the first through hole on the connecting ear, and then pass the fixed shaft through the first through hole and the sixth through hole in sequence to complete the installation of the boom.

[0013] The above method, in the process of raising the lifting height of the boom, since the raising module is arranged at the front end of the slewing platform, the lifting height of the boom is increased, the bending moment of the boom acting on the slewing platform will become larger, and thus the length of the tripod arranged on the other side of the slewing platform needs to be lengthened, and the length of the extended rear support rod of the tripod is determined by the distance from the center of the second through hole to the intersection of the vertical line and the horizontal line. In order to ensure that the extended tripod can be accurately installed between the raising module and the slewing platform, it is necessary to accurately measure the extended length of the tripod, so as to ensure that the distance between the connection point of the front support rod of the tripod and the connection point of the rear support rod is equal to the distance between the connection point on the raising module and the connection point on the slewing platform. In this way, after the raising module is set on the slewing platform, the boom and tripod can be accurately installed on the base. Since only the boom and the front support rod of the tripod need to be raised by the raising module, the center of the base will not be raised, thereby preventing the base from tipping over, thereby further ensuring the reliability of lifting.

[0014] Furthermore, the step S1 further includes:

[0015] Align the outer side surfaces of the two connecting ears with the two side surfaces of the heightening module respectively, and at the same time align one side of the connecting ear with the first vertical portion of the heightening module and be located in the same vertical plane as the first vertical portion, and align the other side of the connecting ear with the inclined portion of the heightening module and be located in the same inclined plane as the inclined portion, and then weld them to fix the connecting ears on the top of the heightening module.

[0016] The above arrangement facilitates matching the connecting ears with the top of the heightening module to achieve a fixed connection and form an integral body.

[0017] Furthermore, the step S2 further includes: S2.1 to S2.3,

[0018] S2.1 Align the first vertical portion of the heightening module with the front end of the rotary platform so that they are in the same vertical plane. Then align the outer side of the heightening module with the side end of the rotary platform so that they are in the same vertical plane. Ensure that the two heightening modules are symmetrical about the central axis and the distance between the centers of the two heightening modules is equal to the distance between the two lifting ears on the boom.

[0019] S2.2 Weld the heightening modules so that the two heightening modules are fixedly connected to the rotary platform;

[0020] S2.3 Place one side of the rib plate against the inner side of the heightening module between the first through hole and the second through hole, and at the same time place the bottom of the rib plate against the rotating platform. After ensuring that the rib plate and the heightening module are vertically arranged, weld the rib plate to achieve a fixed connection between the rib plate, the heightening module and the rotating platform.

[0021] The above arrangement can accurately install the heightening module on the rotary platform, and at the same time further strengthen the connection between the heightening module and the rotary platform through the rib plate.

[0022] Furthermore, the distance in step S3 is obtained by measuring with a tape measure.

[0023] The above settings make it easy to measure the distance accurately and are easy to operate.

[0024] Furthermore, the step S4 further includes:

[0025] S4.1 Use a crane to lift the tripod and place it on a fixed platform. Weld the ends of the support rods to the front and rear support rods of the tripod, fixing the angle between the front and rear support rods.

[0026] S4.2 Remove the connecting ring 1 at the end of the rear support rod. Then, use a crane to lift a connecting rod that matches the diameter of the rear support rod and place it on a lifting platform. Use the lifting platform to adjust the height of the connecting rod so that the rear support rod and the connecting rod are at the same level. Then, weld one end of the connecting rod to the end of the rear support rod.

[0027] S4.3 Reserve a position for welding to connecting ring 1 at the other end of the connecting rod, and weld the other end of the connecting rod to connecting ring 1 so that the distance from the center of the fourth through hole on connecting ring 1 to the welding point between the rear support rod and the connecting rod is equal to the distance from the center of the second through hole to the intersection of the vertical line and the horizontal line.

[0028] In the above setting, since the lifting height of the boom is increased by the heightening module, in order to balance the force of the rotating platform, the rear support rod of the tripod only needs to be lengthened accordingly while keeping the angle between the front support rod and the rear support rod of the original tripod unchanged.

[0029] Furthermore, step S2 also includes: the two heightening modules are symmetrical about the central axis and the distance between the centers of the two heightening modules is equal to the distance between the two lifting ears on the boom.

[0030] The above arrangement enables the two lifting ears on the boom to be more accurately set on the heightening module.

[0031] Furthermore, in step S3, “fixing the angle between the front support rod and the rear support rod” further includes: welding a support rod between the front support rod and the rear support rod.

[0032] The above arrangement ensures the stability of the angle between the front support rod and the rear support rod by welding the support rods.

[0033] Furthermore, step S5 also includes: aligning the fifth through hole set on the connecting ring 2 at the end of the front support rod with the second through hole on the connecting ear, and then passing the fixed axis through the second through hole and the fifth through hole in turn, and at the same time aligning the fourth through hole on the connecting ring 1 at the end of the rear support rod with the third through hole on the fixing seat, and then passing the fixed axis through the third through hole and the fourth through hole in turn to complete the tripod installation.

[0034] The above arrangement is achieved by aligning the second five through holes on the connecting ring with the second through holes and then fixing them through the fixing shaft, which facilitates installation and ensures installation reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of a boom in the prior art.

[0036] Figure 2 It is the workflow diagram of the present invention.

[0037] Figure 3 It is a schematic structural diagram of the tripod after lengthening in the present invention.

[0038] Figure 4 This is a side view of the heightening module of the present invention installed on the rotary platform.

[0039] Figure 5 This is the front view of the heightening module of the present invention installed on the rotary platform.

[0040] Figure 6 This is a schematic diagram of the boom and tripod installed on the rotary platform in the present invention.

[0041] Figure 7 for Figure 6 Enlarged view of point B in the middle. DETAILED DESCRIPTION

[0042] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] like Figures 4 to 7As shown, a method for installing a boom and a tripod for changing the lifting height includes two or more connecting ears 1, a heightening module 2 and a rib plate 3. In this embodiment, as shown in FIG. Figure 4 As shown, four connecting ears 1 are provided, two heightening modules 2 are provided, and two rib plates 3 are provided. The two heightening modules 2 are respectively fixedly connected to the rotary platform 4 along the length direction of the rotary platform 4 and symmetrically arranged about the central axis 5 of the rotary platform 4. The top 21 and the bottom 22 of the heightening module 2 are arranged in parallel. A first vertical portion 23 is provided on one side between the top 21 and the bottom 22 of the heightening module 2, and a second vertical portion 24 and an inclined portion 25 are provided on the other side between the top 21 and the bottom 22 of the heightening module 2. The first vertical portion 23 and the second vertical portion 24 are provided. The first vertical portion 23 and the second vertical portion 24 are arranged perpendicular to the rotary platform 4, and the bottom 21 of the heightening module 2 is tightly attached to the rotary platform 4 and fixedly connected to the rotary platform 4. The first vertical portion 23 and the second vertical portion 24 are arranged in parallel, and an angle a is formed between one end of the inclined portion 25 and the second vertical portion 24. The value range of a is 140°~160°. In this embodiment, a=157°, the height of the first vertical portion 23 is 5m, and the height of the second vertical portion 24 is 2m. The height of the first vertical portion 23 and the height of the second vertical portion 24 can be adjusted according to the needs of actual application.

[0044] like Figure 5 As shown, the width of the two connecting ears 1 matches the width of the heightening module 2. In this embodiment, the distance between the outer sides 15 of the two connecting ears 1 is equal to the width of the heightening module 2. The connecting ears 1 are fixedly connected to the top 21 of the heightening module 2. In this way, after the connecting ears 1 are fixedly connected to the heightening module 2, the two side surfaces of the connecting ears 1 can be aligned with the two side surfaces of the heightening module 2.

[0045] like Figure 4 As shown, the first vertical portion 23 is connected to one side 11 of the connecting ear 1, and the first vertical portion 12 is located in the same vertical plane after being connected to the one side 11 of the connecting ear 1. The other end of the inclined portion 25 is connected to the other side 12 of the connecting ear 1, and the inclined portion 25 is located in the same inclined plane where the inclined portion 25 is located after being connected to the other side 12 of the connecting ear 1. Therefore, after the connecting ear 1 is fixedly connected to the top 21 of the heightening module 2, it can be matched and aligned with the heightening module 2 to form a whole.

[0046] like Figure 4As shown, the connecting ear 1 is provided with a first through hole 13 and a second through hole 14, and a spacing is provided between the first through hole 13 and the second through hole 14, which can ensure that the boom 6 and the tripod can be installed on the connecting ear 1 at the same time. The distance from the center of the first through hole 13 to the top 21 of the heightening module 2 is equal to the distance from the center of the second through hole 14 to the top 21 of the heightening module 2, thereby ensuring that after the connecting ear 1 is fixedly connected to the heightening module 2, the first through hole 13 and the second through hole 14 are on the same horizontal straight line 8.

[0047] like Figure 4-5 As shown, the rib plate 3 is fixedly connected to the inner side of the heightening module 2 and is arranged perpendicular to the heightening module 2. Specifically, one side 31 of the rib plate 3 is fixedly connected to the inner side of the heightening module 2, and the bottom 32 of the rib plate 3 is fixedly connected to the rotating platform 4. In this embodiment, the height of the rib plate 3 is equal to the distance from the center of the first through hole 13 to the bottom 22 of the heightening module 2. The other side 33 of the rib plate 3 is arranged parallel to the heightening module 2, and the top 34 of the rib plate 3 is arranged at an angle, so that the connecting ear 1 is fixedly connected to the heightening module 2 from the inner side of the heightening module 2 through the rib plate 3 to form a whole, so that the rib plate 3, the connecting ear 1 and the heightening module 2 are formed into a whole, so that the connecting ear 1 can withstand a greater force and has greater strength, thereby increasing the lifting height of the boom while also meeting the lifting requirements.

[0048] like Figure 2-7 As shown, the following specific steps are also included:

[0049] S1 Figure 4 As shown, the outer side surfaces of the two connecting ears 1 are aligned with the two side surfaces of the heightening module 2 respectively, and at the same time, one side 11 of the connecting ear 1 is aligned with the first vertical portion 23 of the heightening module 2 and is located in the same vertical plane as the first vertical portion 23. The other side 12 of the connecting ear 1 is aligned with the inclined portion 25 of the heightening module 2 and is located in the same inclined plane as the inclined portion 25. Then, welding is performed to fix the connecting ear 1 to the top of the heightening module 2.

[0050] S2 takes the central axis 5 of the rotary platform 4 as the reference, and then welds the heightening module 2 to the rotary platform 4, so that the two heightening modules 2 are symmetrical about the central axis 5 and the distance between the centers of the two heightening modules 2 is equal to the distance between the two lifting ears on the boom.

[0051] S2.1 As Figure 5 As shown, the first vertical portion 23 of the heightening module 2 is aligned with the front end surface 41 of the rotary platform 4 and located in the same vertical plane. Then, the outer side surface 26 of the heightening module 2 is aligned with the side end surface 42 of the rotary platform 4 and located in the same vertical plane, so that the two heightening modules 2 are symmetrical about the central axis 5 and the distance between the centers of the two heightening modules 2 is equal to the distance between the two lifting ears on the boom.

[0052] S2.2 Weld the heightening modules 2 so that the two heightening modules 2 are fixedly connected to the rotary platform 4;

[0053] S2.3 Place one side 31 of the rib plate 3 against the inner side surface 27 of the heightening module 2, between the first through hole 13 and the second through hole 14, and at the same time make the bottom 32 of the rib plate 3 against the rotating platform 4. After ensuring that the rib plate 3 and the heightening module 2 are vertically arranged, weld the rib plate 3 to achieve a fixed connection between the rib plate 3, the heightening module 2 and the rotating platform 4.

[0054] S3 Figure 7 As shown, in the plane where the connecting ear 1 is located, a vertical line L1 is drawn through the center of the second through hole 14 on the connecting ear 1, and a horizontal line L2 is drawn through the center of the third through hole 93 on the fixing seat 9. Then, the distance from the center of the second through hole 14 to the intersection D of the vertical line L1 and the horizontal line L2 is measured. In this embodiment, the distance d1 from the center of the second through hole 14 to the intersection D of the vertical line L1 and the horizontal line L2 is obtained by measuring with a tape measure.

[0055] S4: Weld a support rod (not shown) between the front strut a1 and the rear strut a2, fix the angle between the front strut 1 and the rear strut 2, remove the connecting ring s1 from the end of the rear strut a2, and then weld a connecting rod 10 with a diameter that matches the rear strut a2 to the end of the rear strut a2. Weld the connecting ring s1 to the connecting rod 10 so that the distance d2 from the center of the fourth through hole s14 on the connecting ring s1 to the weld point between the rear strut a2 and the connecting rod 10 is equal to the distance d1 from the center of the second through hole 14 to the intersection D of the vertical line L1 and the horizontal line L2.

[0056] S4.1 Use a crane to lift the tripod and place it on a fixed platform. Weld the ends of the support rods to the front support rod a1 and the rear support rod a2 of the tripod, respectively, and fix the angle between the front support rod a1 and the rear support rod a2.

[0057] S4.2 Remove the connecting ring s1 at the end of the rear support rod a2. Then, use a crane to lift a connecting rod 10 that matches the diameter of the rear support rod a2 and place it on a lifting platform (not shown in the figure). Use the lifting platform to adjust the height of the connecting rod 10 so that the rear support rod a2 and the connecting rod 10 are at the same level. Then, weld one end of the connecting rod 10 to the end of the rear support rod a2. In this embodiment, a limit block (not shown in the figure) is provided on the lifting platform to fix the connecting rod 10 and ensure that the connecting rod 10 remains stationary on the lifting platform. The lifting platform is conventional technology and will not be described in detail here.

[0058] S4.3 Reserve a position for welding to the connecting ring s1 at the other end of the connecting rod 10, and weld the connecting ring s1 to the other end of the connecting rod 10 so that the distance d2 from the center of the fourth through hole s14 on the connecting ring s1 to the welding point between the rear support rod a2 and the connecting rod 10 is equal to the distance d1 from the center of the second through hole 14 to the intersection D of the vertical line L1 and the horizontal line L2.

[0059] S5: Use a crane to lift the tripod, aligning the fifth through-hole s25 on the second connecting ring s2 at the end of the front support a1 with the second through-hole 14 on the connecting ear 1. Then, insert the fixing shaft (not shown) through the second through-hole 14 and the fifth through-hole s25 in sequence. At the same time, align the fourth through-hole s14 on the first connecting ring s1 at the end of the rear support a2 with the third through-hole 93 on the fixing base 9. Then, insert the fixing shaft through the third through-hole 93 and the fourth through-hole s14 in sequence, completing the tripod installation.

[0060] S6: Use a crane to lift the boom 6, align the sixth through hole s16 on the lifting ear at the root of the boom 6 with the first through hole 13 on the connecting ear 1, and then pass the fixed shaft through the first through hole 13 and the sixth through hole s16 in sequence to complete the installation of the boom.

[0061] The working principle of the present invention is as follows: first, a connecting ear is welded on the top of the heightening module, and then the heightening module is welded on the rotating platform, so that the two heightening modules are symmetrical about the central axis and the distance between the centers of the two heightening modules is equal to the distance between the two lifting ears on the boom, then the distance from the center of the second through hole to the intersection of the vertical line and the horizontal line is measured, and a connecting rod is welded to the end of the rear support rod of the tripod, so that the distance from the center of the fourth through hole on the connecting ring to the welding point of the rear support rod and the connecting rod is equal to the distance from the center of the second through hole to the intersection of the vertical line and the horizontal line, and finally the boom and tripod are respectively installed on the rotating platform.

Claims

1. A method for installing a boom and a tripod to change the lifting height, wherein the boom and the tripod are mounted on a base using a heightening module; The method comprises the following steps: S1 welds the connecting ear to the top of the heightening module; S2 takes the central axis of the rotary platform as the reference, and then welds the heightening module to the rotary platform, including: S2.1~S2.3, S2.1 Align the first vertical portion of the heightening module with the front end of the rotary platform so that they are in the same vertical plane. Then align the outer side of the heightening module with the side end of the rotary platform so that they are in the same vertical plane. Ensure that the two heightening modules are symmetrical about the central axis and the distance between the centers of the two heightening modules is equal to the distance between the two lifting ears on the boom. S2.2 Weld the heightening modules so that the two heightening modules are fixedly connected to the rotary platform; S2.3 Place one side of the rib plate against the inner side of the heightening module between the first through hole and the second through hole, and place the bottom of the rib plate against the rotating platform. After ensuring that the rib plate and the heightening module are perpendicular, weld the rib plate to securely connect the rib plate to the heightening module and the rotating platform. S3: In the plane where the connecting ear is located, draw a vertical line through the center of the second through-hole on the connecting ear, and a horizontal line through the center of the third through-hole on the fixing base located on the rotary platform and opposite to the heightening module, and then measure the distance from the center of the second through-hole to the intersection of the vertical line and the horizontal line; S4: Fix the angle between the front and rear struts, remove the connecting ring 1 from the end of the rear strut, then weld a connecting rod with a diameter that matches the rear strut to the end of the rear strut, and weld the connecting ring 1 to the connecting rod so that the distance from the center of the fourth through hole on the connecting ring 1 to the weld between the rear strut and the connecting rod is equal to the distance from the center of the second through hole to the intersection of the vertical line and the horizontal line; S5: Lift the tripod so that the second connecting ring at the end of the front support rod is aligned with the second through hole on the connecting ear and fixed, and the first connecting ring at the end of the rear support rod is aligned with the third through hole on the fixing base and fixed; S6: Lift the boom so that the sixth through hole on the lifting ear at the base of the boom is aligned with the first through hole on the connecting ear, and then pass the fixed shaft through the first through hole and the sixth through hole in sequence to complete the installation of the boom.

2. A method for installing a boom and a tripod for changing the lifting height according to claim 1, characterized in that: The step S1 further includes: Align the outer side surfaces of the two connecting ears with the two side surfaces of the heightening module respectively, and at the same time align one side of the connecting ear with the first vertical portion of the heightening module and be located in the same vertical plane as the first vertical portion, and align the other side of the connecting ear with the inclined portion of the heightening module and be located in the same inclined plane as the inclined portion, and then weld them to fix the connecting ears on the top of the heightening module.

3. The method for installing a boom and a tripod for changing the lifting height according to claim 1, wherein: The distance in step S3 is measured by a tape measure.

4. The method for installing a boom and a tripod for changing the lifting height according to claim 1, wherein: The step S4 further includes: S4.1 Use a crane to lift the tripod and place it on a fixed platform. Weld the ends of the support rods to the front and rear support rods of the tripod, fixing the angle between the front and rear support rods. S4.2 Remove the connecting ring 1 at the end of the rear support rod. Then, use a crane to lift a connecting rod that matches the diameter of the rear support rod and place it on a lifting platform. Use the lifting platform to adjust the height of the connecting rod so that the rear support rod and the connecting rod are at the same level. Then, weld one end of the connecting rod to the end of the rear support rod. S4.3 Reserve a position for welding to connecting ring 1 at the other end of the connecting rod, and weld connecting ring 1 to the other end of the connecting rod so that the distance from the center of the fourth through hole on connecting ring 1 to the welding point between the rear support rod and the connecting rod is equal to the distance from the center of the second through hole to the intersection of the vertical line and the horizontal line.

5. The method for installing a boom and a tripod for changing the lifting height according to claim 1, wherein: In step S4, “fixing the angle between the front support rod and the rear support rod” further includes: welding a support rod between the front support rod and the rear support rod.

6. The method for installing a boom and a tripod for changing the lifting height according to claim 1, characterized in that: Step S5 also includes: aligning the fifth through hole set on the second connecting ring at the end of the front support rod with the second through hole on the connecting ear, and then passing the fixed shaft through the second through hole and the fifth through hole in turn, and at the same time aligning the fourth through hole on the first connecting ring at the end of the rear support rod with the third through hole on the fixing seat, and then passing the fixed shaft through the third through hole and the fourth through hole in turn to complete the tripod installation.

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