Round tube portal frame type hoisting crane and hoisting equipment

Abstract

The invention provides a circular tube portal frame type hoisting crane and hoisting equipment, and relates to the technical field of hoisting equipment structures. The circular tube portal frame type hoisting crane comprises a cross beam, a first supporting column, a second supporting column and a connecting beam. The first supporting column and the second supporting column are supported at the two axial ends of the cross beam, and the connecting beam is connected below the cross beam. According to the structure, the first supporting column, the second supporting column and the cross beam are arranged to be of a circular tube structure, on one hand, the welding amount of the circular tube structure is greatly reduced compared with an existing box body section structure, and on the other hand, through FEA (finite element) calculation, the welding amount of the circular tube structure is greatly reduced through the circular tube column and circular tube beam welding structure. Small rib plates do not need to be arranged in the first supporting columns, the second supporting columns and the cross beams, the strength requirement can be met, the welding workload is greatly reduced, welding construction in the small box body is not needed, the welding difficulty is greatly reduced, the manufacturing progress is accelerated, the manufacturing cost is reduced, and the weight can be saved by about 20%.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting equipment structures, and in particular to a lifting crane and lifting equipment in a circular tube gantry structure. Background Art

[0002] Yard cranes are the mainstream loading and unloading equipment used in container yards. To facilitate maintenance, their main beams are equipped with a lifting crane (also called a maintenance crane) to facilitate the lifting of components during maintenance.

[0003] The frame of a conventional crane is composed of columns and main beams forming a portal frame, which are all thin-walled rectangular boxes, such as Figure 1 The figure shows the structure of an existing field crane, which includes a column 1 and a main beam 2. Both the column 1 and the main beam 2 are rectangular box structures with small ribs arranged inside the box. However, during the manufacturing process, this structure has the problem of heavy box welding workload, and the small ribs arranged inside the narrow box make welding difficult. Summary of the Invention

[0004] The purpose of the present invention is to provide a hoisting crane with a circular tube gantry structure, which can improve the technical problems of large welding workload and high difficulty of the hoisting crane in the prior art.

[0005] Another object of the present invention is to provide a lifting device that can improve the technical problems in the prior art of heavy workload and high difficulty in lifting and welding.

[0006] The embodiments of the present invention can be implemented in the following ways:

[0007] A lifting crane with a circular tube gantry structure, comprising:

[0008] A first support column and a second support column are spaced apart, wherein the cross-sections of the first support column and the second support column are both tubular;

[0009] a crossbeam, wherein both ends of the crossbeam are respectively welded to the first support column and the second support column, and the cross section of the crossbeam is in the shape of a circular tube; and

[0010] A connecting beam is fixedly connected below the cross beam, and the connecting beam extends along the axial direction of the cross beam.

[0011] Optionally, the circular tube gantry type lifting crane also includes a plurality of first connecting plates, which are arranged in sequence and spaced apart along the axial direction of the crossbeam between the crossbeam and the connecting beam, and the upper and lower ends of the first connecting plates are respectively welded and fixed to the crossbeam and the connecting beam, and the length direction of the first connecting plates extends the axial extension of the crossbeam.

[0012] Optionally, the first connecting plate includes a first side welded and fixed to the crossbeam and a second side welded and fixed to the connecting beam, and the length of the first side is greater than the length of the second side.

[0013] Optionally, the first connecting plate further includes a first concave edge and a second concave edge located at both ends of the first edge and the second edge, the first concave edge and the second concave edge are symmetrically arranged concave curves, and along the direction from the first edge to the second edge, the distance between the first concave edge and the second concave edge first decreases and then increases.

[0014] Optionally, the connecting beam is an I-beam, which includes a first wing plate and a second wing plate that are spaced apart and a web plate located between the first wing plate and the second wing plate; the lower end of the first connecting plate is welded and fixed to the first wing plate.

[0015] Optionally, the hoisting crane with a circular tube gantry structure also includes a second connecting plate, which is arranged at the mid-span position of the beam; the upper and lower ends of the second connecting plate are respectively welded and fixed to the beam and the connecting beam, and the second connecting plate has a first plate portion extending along the axial direction of the beam and a second plate portion extending along the transverse direction of the hoisting crane with a circular tube gantry structure.

[0016] Optionally, there are multiple second connecting plates, one of which is located at the mid-span position; the remaining second connecting plates are distributed from the mid-span position to the axial sides of the beam, and a second connecting plate is provided every time a first connecting plate is spaced apart.

[0017] Optionally, along the direction from the cross beam to the connecting beam, the length of the second plate portion decreases, and the length of the first plate portion first increases and then decreases.

[0018] Optionally, the connecting beam includes a web and a wing plate, the upper end of the web is welded and fixed to the cross beam, and the lower end of the web is fixedly connected to the wing plate.

[0019] Optionally, the connecting beam is a structure obtained by removing a side wing plate from an I-beam.

[0020] Optionally, the crossbeam is a spiral steel pipe formed by rolling steel plates; and / or,

[0021] The first support column and the second support column are spiral steel pipes formed by rolling steel plates.

[0022] A lifting device includes a lifting crane of the circular tube gantry structure as described above.

[0023] The beneficial effects of the hoisting crane and the hoisting equipment of the circular tube gantry structure provided by the embodiments of the present invention include:

[0024] An embodiment of the present invention provides a lifting crane with a circular tube gantry structure, in which the first support column, the second support column and the cross beam are arranged to adopt a circular tube structure. On the one hand, the welding amount of the circular tube structure is greatly reduced compared with the existing box cross-section structure. On the other hand, according to FEA (finite element) calculation, the structure using circular tube columns and circular tube beams for welding can meet the strength requirements without the need to set small ribs in the first support column, the second support column and the cross beam, which greatly reduces the welding workload. Moreover, since there is no need to perform welding construction inside the small box, the welding difficulty is also greatly reduced, which helps to speed up the manufacturing progress, reduce manufacturing costs, and save approximately 20% of weight.

[0025] An embodiment of the present invention also provides a lifting device, which includes the above-mentioned circular tube gantry type lifting crane, so it can greatly reduce the welding workload, and since there is no need to perform welding construction inside the small box, the welding difficulty is also greatly reduced, which helps to speed up the manufacturing progress, reduce manufacturing costs, and also has the beneficial effect of reducing weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above features and advantages of the present invention will be better understood after reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings. In the drawings, the components are not necessarily drawn to scale, and components with similar related properties or characteristics may have the same or similar reference numerals.

[0027] Figure 1 Shows a schematic diagram of the structure of a crane in an existing structure;

[0028] Figure 2 A schematic structural diagram of a lifting crane of a circular tube gantry type provided according to one aspect of the present invention is shown;

[0029] Figure 3 Shown Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle;

[0030] Figure 4 Shown Figure 2 Schematic diagram of the cross-sectional structure at the middle BB;

[0031] Figure 5 It shows a schematic structural diagram of a first connecting plate provided according to one aspect of the present invention;

[0032] Figure 6 A cloud diagram showing a simulation calculation of a hoisting crane of a circular tube gantry structure provided according to one aspect of the present invention is shown;

[0033] Figure 7A simulation calculation cloud diagram of a crane in a circular tube gantry structure provided in accordance with one aspect of the present invention at the connection between the crossbeam and the first support column is shown;

[0034] Figure 8 A cloud diagram of simulation calculations of a crane using a first connecting plate structure of other configurations is shown;

[0035] Figure 9 A schematic structural diagram of a lifting crane of a circular tube gantry type provided according to another aspect of the present invention is shown;

[0036] Figure 10 Shown Figure 9 Schematic diagram of the cross-section structure at CC;

[0037] Figure 11 A schematic structural diagram of a second connecting plate in a hoisting crane of a circular tube gantry structure according to another aspect of the present invention is shown;

[0038] Figure 12 A simulated stress calculation cloud diagram of a hoist crane of a circular tube gantry structure provided according to another aspect of the present invention is shown;

[0039] Figure 13 It shows a stress cloud diagram of a simulated calculation of a hoisting crane of a circular tube gantry structure provided according to one aspect of the present invention;

[0040] Figure 14 A cloud diagram showing the calculated deformation of a crane with a circular tube gantry structure according to another aspect of the present invention is shown;

[0041] Figure 15 A cloud diagram showing the calculated deformation of a crane with a circular tube gantry structure according to one aspect of the present invention is shown;

[0042] Figure 16 A schematic structural diagram of a lifting crane of a circular tube gantry type provided according to another aspect of the present invention is shown;

[0043] Figure 17 Shown Figure 16 Schematic diagram of the cross-sectional structure at DD in the middle.

[0044] Reference numerals:

[0045] 100 - Hoist with circular tube gantry structure; 111 - Crossbeam; 112 - First support column; 113 - Second support column; 114 - Triangular connecting plate; 120 - Connecting beam; 121 - Wing plate; 122 - First wing plate; 123 - Second wing plate; 124 - Web plate; 130 - First connecting plate; 131 - First side; 132 - Second side; 133 - First concave side; 134 - Second concave side; 140 - Second connecting plate; 141 - First plate portion; 142 - Second plate portion; 150 - Suspension electric hoist;

[0046] 1-column; 2-main beam. DETAILED DESCRIPTION

[0047] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Note that the various aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of the present invention.

[0048] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inner", "outer", "vertical" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the invention is usually placed when in use, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0049] At the same time, it should be noted that the terms "first", "second", etc. are only used to distinguish and describe, and cannot be understood as indicating or implying relative importance.

[0050] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connection, integral connection, or detachable connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0051] First embodiment

[0052] Figure 2 This is a structural diagram of a hoisting crane 100 of a circular tube gantry structure provided in this embodiment. Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle, Figure 4 for Figure 2 Schematic diagram of the cross-section structure at the middle BB. Please refer to Figure 2-Figure 3This embodiment provides a hoisting crane 100 with a circular tube gantry structure, and also provides a lifting device. The lifting device can be a tire-type container gantry crane with the hoisting crane 100 with the above-mentioned circular tube gantry structure, or it can also be other equipment that requires lifting and maintenance with the hoisting crane 100 with the above-mentioned circular tube gantry structure.

[0053] The hoisting crane 100 of the circular tube gantry structure includes a first support column 112 and a second support column 113 arranged at intervals. The cross sections of the first support column 112 and the second support column 113 are both circular tube-shaped, that is, the first support column 112 and the second support column 113 are circular tubular members. It should be noted that in this embodiment, "cross section" refers to a surface cut by a plane perpendicular to the axis, that is, the cross section of the first support column 112 is as follows: Figure 4 The structure shown, similarly, Figure 3 The structure shown is a cross section of the beam 111 mentioned later.

[0054] Specifically, the first support column 112 and the second support column 113 have the same structure, being vertically arranged columnar members. The lower ends of the first support column 112 and the second support column 113 are fixedly connected to the ground or other locations, and the upper ends of the first support column 112 and the second support column 113 are fixedly connected to the crossbeam 111, thereby providing support for the crossbeam 111.

[0055] The circular tube gantry crane 100 further includes a crossbeam 111, the ends of which are welded to a first support column 112 and a second support column 113, respectively. The cross-section of the crossbeam 111 is a circular tubular member. The ends of the crossbeam 111 are welded to the upper ends of the first support column 112 and the second support column 113, respectively. Thus, the support of the first support column 112 and the second support column 113 maintains the crossbeam 111 in a substantially horizontal position.

[0056] Specifically, when connecting the crossbeam 111 with the first support column 112 and the second support column 113, the intersection line between the first support column 112 and the second support column 113 and the crossbeam 111 should first be processed, and then the intersection line position of the upper ends of the first support column 112 and the second support column 113 should be abutted against the bottom of the axial ends of the crossbeam 111, and finally the first support column 112 and the second support column 113 are welded and fixed to the crossbeam 111 by welding.

[0057] Furthermore, triangular connecting plates 114 are provided at the connection between the crossbeam 111 and the first support column 112 and the second support column 113. The triangular connecting plates 114 provided at the two locations have the same structure. The triangular connecting plate 114 at the connection between the first support column 112 and the crossbeam 111 is used as an example for explanation below:

[0058] The triangular connecting plate 114 is a structure consisting of two right-angled sides and an arcuate side 117 connected between the two right-angled sides. The two right-angled sides are respectively the first right-angled side and the second right-angled side. The first right-angled side is welded and fixed to the beam 111, and the second right-angled side is welded and fixed to the first support column 112. The arcuate side is an arc that is concave toward the connection between the two right-angled sides.

[0059] Furthermore, in this embodiment, crossbeam 111 is formed from a spiral steel tube formed from rolled steel plates. This structure can be manufactured using standardized production equipment, eliminating the need for on-site welding. Similarly, in this embodiment, first support column 112 and second support column 113 are formed from a spiral steel tube formed from rolled steel plates. It is understood that in other embodiments, other round tubes may be used as crossbeam 111, first support column 112, or second support column 113.

[0060] In this embodiment, the hoist crane 100 of the circular tube gantry structure further includes a connecting beam 120 fixedly connected to the bottom of the crossbeam 111, and the connecting beam 120 extends along the axial direction of the crossbeam 111, that is, the connecting beam 120 and the crossbeam 111 are arranged side by side up and down. Specifically, in this embodiment, the connecting beam 120 is an I-beam, which includes a first wing plate 122 and a second wing plate 123 spaced apart from each other, and a web plate 124 located between the first wing plate 122 and the second wing plate 123. Specifically, the hoist crane 100 of the circular tube gantry structure further includes a suspended electric hoist 150, which is mounted on the connecting beam 120 and can move along the connecting beam 120, thereby realizing the lifting and movement of objects through the suspended electric hoist 150.

[0061] Furthermore, in this embodiment, since the crossbeam 111 is a circular tube structure, its bending resistance is weaker than that of a box structure. Therefore, a connecting plate extending longitudinally (i.e., parallel to the axis of measurement) is required between the crossbeam 111 and the connecting beam 120. This connecting plate is the first connecting plate 130. The upper and lower ends of the first connecting plate 130 are welded to the crossbeam 111 and the connecting beam 120, respectively.

[0062] Figure 5 The schematic diagram of the structure of the first connecting plate 130 provided in this embodiment is shown. Figure 2-Figure 5 Specifically, there are multiple first plate-like members, spaced apart along the axial direction of the crossbeam 111. Furthermore, the first connecting plate 130 is a plate-like structural member, its length extending along the axial direction of the crossbeam 111. The first connecting plate 130 includes a first side 131 and a second side 132 spaced apart from each other. The first side 131 is welded to the crossbeam 111, and the second side 132 is welded to the connecting beam 120. The length of the first side 131 is greater than the length of the second side 132.

[0063] Optionally, the first connecting plate 130 also includes a first concave edge 133 and a second concave edge 134 located at both ends of the first edge 131 and the second edge 132. The first concave edge 133 and the second concave edge 134 are symmetrically arranged concave curves, and along the direction from the first edge 131 to the second edge 132, the distance between the first concave edge 133 and the second concave edge 134 first decreases and then increases.

[0064] Figure 6 The simulation calculation cloud diagram of the hoist crane 100 of the circular tube gantry structure provided in this embodiment is shown. Figure 7 The following figure shows a simulation calculation cloud diagram of the connection between the crossbeam 111 and the first support column 112 of the circular tube gantry crane 100 provided in this embodiment. At the same time, in order to further demonstrate the performance of the circular tube gantry crane 100 provided in this embodiment, Figure 8 The simulation calculation cloud diagram of the crane using the first connecting plate structure of other configurations is shown. Optionally, Figure 8 The first connecting plate in the embodiment is a square plate. Figure 6-Figure 8 ,contrast Figure 6 and Figure 8 It can be clearly seen that the connection between the cross beam 111 and the connecting beam 120 is achieved by setting the first connecting plate 130 of the structural shape, thereby transferring the load of the connecting beam 120 to the cross beam 111. The overall force of the hoisting crane 100 of the circular tube gantry structure is relatively Figure 8 The structure shown is more uniform, which helps improve performance. This type of circular tube gantry crane 100 is suitable for cranes with low lateral forces. In this structure, the distance between the first support column 112 and the second support column 113 reaches 20.7 meters, the height of the first support column 112 and the second support column 113 reaches 7 meters, and the crane itself weighs 7 tons. It is understood that in other embodiments, the structure of the first connecting plate 130 can also be configured as required.

[0065] The production process of the hoist crane 100 of the circular tube gantry structure provided in this embodiment is as follows:

[0066] 1. Using standardized production equipment, the steel plate is rolled into a spiral steel tube to form the crossbeam 111 and the first support column 112 and the second support column 113;

[0067] 2. Process the intersection line between the first support column 112 and the second support column 113 and the crossbeam 111;

[0068] 3. Cutting and forming the first connecting plate 130 and the connecting beam 120;

[0069] 4. Mark the first connecting plate 130 with the connecting beam 120 and the cross beam 111 and perform preliminary spot welding;

[0070] 5. Weld the first connecting plate 130 to the connecting beam 120 and the cross beam 111;

[0071] 6. Weld the first support portion and the second support column 113 to the crossbeam 111;

[0072] 7. Installation of suspended electric hoist 150;

[0073] 8. Welding of other accessories and auxiliary parts.

[0074] Second embodiment

[0075] Figure 9 FIG. 1 shows a structural diagram of a hoisting crane 100 of a circular tube gantry structure provided in this embodiment. Figure 10 for Figure 9 Schematic diagram of the cross-section structure at CC in the middle, Figure 11 The schematic diagram of the structure of the second connecting plate 140 in the hoisting crane 100 of the circular tube gantry structure provided in this embodiment is shown. Figures 9-11 This embodiment also provides a circular tube gantry crane 100, the structure of which is similar to Figure 2 The structure of the first embodiment shown is basically the same, and the similarities are not repeated here. The difference is that a second connecting plate 140 is further provided between the cross beam 111 and the connecting beam 120. The provision of the second connecting plate 140 can effectively increase the lateral strength of the circular tube gantry crane 100.

[0076] Specifically, the second connecting plate 140 is disposed at the mid-span of the crossbeam 111, with its upper and lower ends welded to the crossbeam 111 and the connecting beam 120, respectively. That is, the second connecting plate 140 and the first connecting plate 130 are both disposed within the gap between the crossbeam 111 and the connecting beam 120 in the vertical direction. The second connecting plate 140 comprises a cross-shaped structure formed by a first plate portion 141 and a second plate portion 142. The first plate portion 141 is a plate-like member extending axially along the crossbeam 111, while the second plate portion 142 is a plate-like member extending transversely along the circular tube gantry structure of the crane 100.

[0077] Furthermore, the number of the second connecting plates 140 is set to be multiple, one of the second connecting plates 140 is set at the mid-span position of the beam 111, and the remaining second connecting plates 140 are distributed from the mid-span position of the beam 111 to both sides along the axial direction of the beam 111. Specifically, a second connecting plate 140 is set every time a first connecting plate 130 is separated, that is, the second connecting plate 140 is set between two adjacent first connecting plates 130.

[0078] Furthermore, in this embodiment, the length dimension of the second plate portion 142 decreases along the direction from the crossbeam 111 to the connecting beam 120. The length dimension of the first plate portion 141 first increases and then decreases along the direction from the crossbeam 111 to the connecting beam 120. Specifically, the structure of the first plate portion 141 is the same as that of the first connecting plate 130, so the second connecting plate 140 can also be regarded as a structure formed by adding the second plate portion 142 to the first connecting plate 130. Therefore, the processing process of the hoisting crane 100 of the circular tube gantry structure provided in this embodiment can be achieved by adding the welding steps of the second plate portion 142, the crossbeam 111 and the connecting beam 120 to steps 4 and 5 of the processing process of the hoisting crane 100 of the circular tube gantry structure of the first embodiment.

[0079] Figure 12 The simulated stress calculation cloud diagram of the hoist crane 100 of the circular tube gantry structure provided in this embodiment is shown. Figure 13 The figure shows the simulated stress calculation cloud diagram of the hoist crane 100 of the circular tube gantry structure provided by the first embodiment. Figure 14 The calculation cloud diagram of the simulated deformation of the hoist crane 100 of the circular tube gantry structure provided in this embodiment is as follows: Figure 15 This is a calculation cloud diagram of the simulated deformation of the hoist crane 100 of the circular tube gantry structure provided in the first embodiment. Figure 12-15 , Figure 12-15 The simulation results of two types of circular tube gantry cranes 100 (the first embodiment structure and the second embodiment structure) under the same load (including lateral force) and constraint conditions are shown. Figure 12-15 The calculation results are shown in Table 1 below. Figure 12 and Figure 13 As can be seen from Table 1 below, under the same load (including lateral force) and constraint conditions, the hoisting crane 100 of the circular tube gantry structure provided in this embodiment is subjected to less stress, indicating that the hoisting crane 100 of the circular tube gantry structure provided in this embodiment has better strength against lateral force; Figure 14 and Figure 15 As can be seen from Table 1 below, under the same load (including lateral force) and constraint conditions, the circular tube gantry crane 100 provided in this embodiment produces less deformation, indicating that the circular tube gantry crane 100 provided in this embodiment has better rigidity against lateral forces. Specifically, the circular tube gantry crane 100 provided in this embodiment is suitable for situations where the lateral load is approximately 10% of the vertical load.

[0080] Table 1

[0081] First embodiment structure Second embodiment structure Maximum stress result (MPa) 300.74 269.71 Maximum deformation result (mm) 36.838 26.214

[0082] Third embodiment

[0083] Figure 16 FIG. 1 shows a structural diagram of a hoisting crane 100 of a circular tube gantry structure provided in this embodiment. Figure 17 Shown Figure 16 Please refer to the cross-sectional structure diagram at DD. Figure 16 and Figure 17 This embodiment also provides another circular tube gantry type crane 100, in which the structure and connection structure of the crossbeam 111, the first support column 112 and the second support column 113 are the same, except that the connection structure between the crossbeam 111 and the connecting beam 120 is different.

[0084] Specifically, in this embodiment, the connecting beam 120 includes a web 124 and a wing 121. The upper end of the web 124 is welded and fixed to the crossbeam 111, and the lower end of the web 124 is fixedly connected to the wing 121. Furthermore, in this embodiment, the connecting beam 120 is a structure obtained by removing a wing from one side of the I-beam. That is, compared with the first embodiment, the connecting beam 120 provided in this embodiment is a structure formed by removing the first wing 122 and being composed of the web 124 and the second wing 123. This structure is light in weight and the weld seam (the weld between the web 124 and the crossbeam 111) is continuous, which has great advantages for projects that require extreme weight reduction. At the same time, compared with the structure of the first embodiment, it has a stronger ability to resist lateral strength. However, if the work of cutting off the first wing 122 is not well controlled, the flatness will be poor and the error will be difficult to control.

[0085] The production process of the hoist crane 100 of the circular tube gantry structure provided in this embodiment is as follows:

[0086] 1. Using standardized production equipment, the steel plate is rolled into a spiral steel tube to form the crossbeam 111 and the first support column 112 and the second support column 113;

[0087] 2. Process the intersection line between the first support column 112 and the second support column 113 and the crossbeam 111;

[0088] 3. Cut the I-beam and remove the upper wing plate to form the connecting beam 120;

[0089] 4. Mark the connecting beam 120 and the cross beam 111 and perform preliminary spot welding;

[0090] 5. Weld the connecting beam 120 and the cross beam 111;

[0091] 6. Weld the first support portion and the second support column 113 to the crossbeam 111;

[0092] 7. Installation of suspended electric hoist 150;

[0093] 8. Welding of other accessories and auxiliary parts.

[0094] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technology in this field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A hoist with a circular tube gantry structure, characterized in that: The hoisting crane of the circular tube gantry structure includes: A first support column and a second support column are spaced apart, wherein the cross-sections of the first support column and the second support column are both tubular; a crossbeam, wherein both ends of the crossbeam are respectively welded to the first support column and the second support column, and the cross section of the crossbeam is in the shape of a circular tube; and A connecting beam is fixedly connected below the cross beam, and the connecting beam extends along the axial direction of the cross beam.

2. The circular tube gantry crane according to claim 1 is characterized in that: The circular tube gantry type lifting crane also includes a plurality of first connecting plates, which are arranged in sequence and spaced apart between the crossbeam and the connecting beam along the axial direction of the crossbeam, and the upper and lower ends of the first connecting plates are respectively welded and fixed to the crossbeam and the connecting beam, and the length direction of the first connecting plates extends the axial extension of the crossbeam.

3. The hoisting crane of the circular tube gantry structure according to claim 2 is characterized in that: The first connecting plate includes a first side welded and fixed to the crossbeam and a second side welded and fixed to the connecting beam, and the length of the first side is greater than the length of the second side.

4. The circular tube gantry crane according to claim 3 is characterized in that: The first connecting plate also includes a first concave edge and a second concave edge located at both ends of the first edge and the second edge. The first concave edge and the second concave edge are symmetrically arranged concave curves, and along the direction from the first edge to the second edge, the distance between the first concave edge and the second concave edge first decreases and then increases.

5. The circular tube gantry crane according to claim 2, characterized in that: The connecting beam is an I-beam, which includes a first wing plate and a second wing plate that are spaced apart and a web plate located between the first wing plate and the second wing plate; the lower end of the first connecting plate is welded and fixed to the first wing plate.

6. The circular tube gantry crane according to claim 2, characterized in that: The hoisting crane with a circular tube gantry structure also includes a second connecting plate, which is arranged at the mid-span position of the beam; the upper and lower ends of the second connecting plate are respectively welded and fixed to the beam and the connecting beam, and the second connecting plate has a first plate portion extending along the axial direction of the beam and a second plate portion extending along the transverse direction of the hoisting crane with a circular tube gantry structure.

7. The circular tube gantry crane according to claim 6, characterized in that: There are multiple second connecting plates, one of which is located at the mid-span position; the remaining second connecting plates are distributed from the mid-span position to the axial sides of the beam, and a second connecting plate is provided every time a first connecting plate is spaced apart.

8. The circular tube gantry crane according to claim 6, characterized in that: Along the direction from the cross beam to the connecting beam, the length of the second plate portion decreases gradually, and the length of the first plate portion first increases and then decreases gradually.

9. The circular tube gantry crane according to claim 1, characterized in that: The connecting beam includes a web and a wing plate. The upper end of the web is welded and fixed to the cross beam, and the lower end of the web is fixedly connected to the wing plate.

10. The circular tube gantry crane according to claim 9, characterized in that: The connecting beam is a structure obtained by removing a side wing plate from an I-beam.

11. The circular tube gantry crane according to claim 1, characterized in that: The crossbeam is a spiral steel pipe formed by rolling steel plates; and / or, The first support column and the second support column are spiral steel pipes formed by rolling steel plates.

12. A lifting device, characterized in that: The lifting equipment includes a lifting crane of a circular tube gantry structure as described in any one of claims 1-11.

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