A double-layer split eight-pole structure and a portal crane comprising the same

Abstract

The application discloses a double-layer split eight-pole structure and a portal crane comprising the same, which comprises a center tower, upper-layer circular tube main limbs and a lower-layer split structure. The bottom of the center tower is connected with eight upper-layer circular tube main limbs arranged in a positive cone shape. Two upper-layer circular tube main limbs on the same side of the center tower are arranged in an inverted V shape, and two upper-layer circular tube main limbs on adjacent sides of the center tower are arranged in a positive V shape. The lower-layer split structure is composed of four split components arranged in a positive cone shape. The top of each split component is connected with the bottom of two upper-layer circular tube main limbs arranged in a positive V shape through flanges.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of portal crane, and particularly relates to a double-layer split eight-pole structure of portal crane and a portal crane comprising the structure. BACKGROUND

[0002] With the expansion of production scale and the improvement of automation degree, the portal crane as an important material handling equipment is applied more and more in modern production process, but the traditional portal crane adopts cylindrical, truss type, independent portal structure, etc., and many types of portal structures cannot meet the performance parameters of large operation range, large span, large lifting height and other performance parameters required by the current port hoisting.

[0003] The top of the traditional eight-pole portal crane is a circular ring structure, and the annular track and gear are arranged on the circular ring structure, the cross section of the circular ring is usually box-shaped or H-shaped with wide web, which requires high matching precision, complex manufacturing process, high production cost, especially for the top circular ring structure, the welding amount is large, the detection standard is high, and the welding quality is difficult to effectively control and ensure, which greatly affects the safety and economy of the portal crane. SUMMARY

[0004] The purpose of the present application is to overcome the shortcomings of the prior art, and to provide a double-layer split eight-pole structure and a portal crane comprising the structure; the double-layer split eight-pole structure of the portal crane designed by the present application has the advantages of clear stress, simple manufacturing, large stiffness, good economy, strong wind resistance, etc., and gradually gets the favor of the port hoisting industry, solves the technical problems of low lifting height, complex manufacturing process and high assembly precision of the traditional portal crane; solves the technical defects of large weight, high material consumption and high cost of the traditional portal crane.

[0005] In order to achieve the above purpose, the present application is realized by the following technical scheme:

[0006] In the first aspect, the embodiment of the present application provides a double-layer split eight-pole structure for portal crane; comprising a center tower, an upper layer circular pipe main limb and a lower layer split structure, the bottom of the center tower is connected with eight upper layer circular pipe main limbs arranged in a positive cone shape, two upper layer circular pipe main limbs on the same side of the center tower are arranged in an inverted V shape, and two upper layer circular pipe main limbs on the adjacent side of the center tower are arranged in a positive V shape; the lower layer split structure is composed of four split components arranged in a positive cone shape, and the top of each split component is connected with the bottom of two upper layer circular pipe main limbs arranged in a positive V shape through flanges.

[0007] As a further technical scheme, the center tower is welded by connecting flanges, first main limbs, K-shaped web members and steel beams; the first main limbs include four first main limbs which are arranged in parallel and have equal lengths, first connecting flanges are welded at the top and bottom of each first main limb, and the K-shaped web members and the steel beams are welded between adjacent first main limbs to form an integral whole.

[0008] As a further technical scheme, the first connecting flange at the top of the first main limb is connected with a standard section of the crane tower body, and the first connecting flange at the bottom is connected with a base section of the crane tower body.

[0009] As a further technical scheme, the K-shaped web member is located at the upper part of the adjacent first main limb, and the steel beam is located at the lower part of the adjacent first main limb.

[0010] As a further technical scheme, the second connecting flange at the top of the upper circular pipe main limb is connected with the steel beam of the center tower, and the second connecting flange at the bottom is connected with the lower piece structure.

[0011] As a further technical scheme, the steel beams are connected by connecting rods.

[0012] As a further technical scheme, the piece assembly is welded into a tetrahedron structure by second main limbs and triangular web members, the upper end of the second main limb is forked, and the triangular web members are used for connecting adjacent piece assemblies.

[0013] As a further technical scheme, the upper end of the second main limb is connected with the lower part of the two upper V-shaped circular pipe main limb structures through third connecting flanges, and the lower end of the second main limb is connected with the portal through a fourth connecting flange.

[0014] As a further technical scheme, the triangular web members of adjacent piece assemblies are connected by fifth connecting flanges.

[0015] In a second aspect, the application also discloses a portal crane comprising the double-layer split piece eight-bar structure.

[0016] The beneficial effects of the above embodiments of the application are as follows:

[0017] 1) The application cancels the top circular ring of the traditional eight-bar structure, adopts a pipe truss structure, has clear stress, low wind force coefficient, strong wind resistance and strong anti-skid ability;

[0018] 2) The double-layer eight-bar structure can greatly increase the lifting height and rigidity of the crane compared with the single-layer structure;

[0019] 3) The eight-pole structure is divided into upper layer and lower layer, which can reduce the number of connecting nodes, and can also reduce the transportation cost;

[0020] 4) The new eight-pole structure and the crane center tower are connected by flanges. Under the conditions of meeting the strength and stability, the height of the center tower can be increased according to the demand, which can enhance the adaptability of the crane. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings constituting a part of this specification show further aspects of the present application, and to explain the illustrative embodiments of the present application and their descriptions serve to explain the present application, and do not constitute improper limitations on the present application.

[0022] Figure 1 is the overall structure schematic diagram of the present application;

[0023] Figure 2 is the center tower transition part schematic diagram of the present application;

[0024] Figure 3 is the upper layer V-shaped round pipe main limb structure schematic diagram of the present application;

[0025] Figure 4 is the lower layer piece structure schematic diagram of the present application;

[0026] Figure 5 is the connection state schematic diagram of the upper layer V-shaped round pipe main limb structure and the lower layer piece structure of the present application;

[0027] Figure 6 is the overall structure top view of the present application;

[0028] In the figure: 1, center tower, 2, upper layer V-shaped round pipe main limb, 3, connecting flange, 4, lower layer piece structure; 11, connecting flange; 12, main limb; 13, K-shaped web member; 14, steel beam; 41 main limb, 42 connecting flange, 43 connecting flange, 44 triangular web member. DETAILED DESCRIPTION

[0029] It should be pointed out that the following detailed description is exemplary, and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as that generally understood by those skilled in the art to which the present application belongs.

[0030] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0031] For the convenience of description, the "upper" and "lower" directions in the present application are defined with the height direction of the portal crane tower body as the reference.

[0032] As introduced in the background, in order to solve the above technical problems, the present application proposes a double-layer split eight-pole structure.

[0033] In a typical embodiment of the present application, as shown in Figure 1 The double-layer split eight-pole structure disclosed in the present embodiment comprises a center tower 1, a connecting flange 3, an upper-layer circular tube main limb 2, and a lower-layer split structure 4. The upper part of the portal crane structure is connected to the center tower 1 through the flange to downwardly transmit the bending moment, lateral force, and axial force. The center tower 1 is connected to the eight upper-layer circular tube main limbs 2 to form a transition structure. The upper-layer circular tube main limb 2 is connected to the lower-layer split structure 4 through a plurality of flanges to form a spatially symmetrical truss eight-pole structure. All the loads are sequentially transmitted through the center tower 1, the eight upper-layer circular tube main limbs 2, and the lower-layer split structure 4, and finally transmitted to the tower body base of the portal crane through the four nodes at the bottom of the lower-layer split structure 4, and then transmitted to the foundation through the portal crane running mechanism, thereby forming a stable spatial eight-pole portal structure.

[0034] Further, the center tower 1 is composed of a connecting flange 11, a main limb 12, a K-shaped web 13, and a steel beam 14. The main limb 12 comprises four main limbs 12 which are equal in length and arranged in parallel. The connecting flange 11 is welded to the top and bottom of each main limb 12. The connecting flange 11 at the top of the main limb 12 is connected to the standard section of the crane tower, and the connecting flange at the bottom of the main limb 12 is connected to the base section of the crane tower. The K-shaped web 13 and the steel beam 14 are welded between the adjacent main limbs 12 to form a whole with the K-shaped web 13 and the steel beam 14 located in the four planes of the center tower. The main limb 12 is of an equal cross-section square structure.

[0035] Further, the K-shaped web 13 is connected to the upper part of the adjacent main limb 12, and the steel beam 14 is connected to the lower part of the adjacent main limb 12.

[0036] Further, in order to enhance the strength of the whole device, the adjacent steel beams 14 are further connected through connecting rods to form a whole.

[0037] Further, the upper layer pipe main limb structure is composed of eight circular steel pipes of the same specification, and the two ends of the steel pipes are welded with connecting flanges, the upper end flange is connected with the steel beam 14 of the center tower through bolt connection of hinged holes, and the lower end flange is connected with the eight lower layer sheet type structure through bolt connection of hinged holes, the whole structure is arranged in a positive cone shape, two upper layer pipe main limbs on the same side of the center tower are arranged in an inverted V shape, and two upper layer pipe main limbs on adjacent sides of the center tower are arranged in a V shape; this structure converts the upper bending moment, transverse force and axial force into eight axial forces of the upper layer, and the axial force is a cyclic alternating internal force according to different boom angles.

[0038] Further, the above-mentioned lower layer sheet type structure 4 is composed of four sheet type assemblies with the same structure, and the four sheet type assemblies are arranged in a positive cone shape, wherein the structure of one sheet type assembly is as shown in Figure 4 The sheet type assembly structure is a tetrahedral structure composed of a main limb 41, a connecting flange 42, a connecting flange 43 and a triangular web 44, wherein the upper end of the main limb 41 is connected with the lower part of the two pipe main limbs arranged in a V shape through flanges, and the lower end is connected with the portal through high-strength bolt connection, so as to transmit all external loads to the portal, which can reduce the number of connection nodes and also can reduce the transportation cost without exceeding the limit. Specifically, the main limb 41 of the whole lower layer sheet type structure 4 includes four main limbs 41, the four main limbs 41 are designed to have the same length, and the adjacent main limbs 41 are connected through triangular webs 42 to form a whole.

[0039] Further, the triangular web 42 of one sheet type assembly includes five webs, and the five webs and the main limb 41 and the five webs form four triangles, which form a stable structure and further increase the stability of the whole device.

[0040] The present application cancels the top ring of the traditional eight-bar structure, adopts a pipe truss type structure, has clear stress, low wind force coefficient, strong wind resistance and sliding resistance; compared with the single-layer structure, the double-layer eight-bar structure can greatly increase the lifting height and rigidity of the crane; the split eight-bar structure adopts an upper layer segmentation and a lower layer splitting structure, which can reduce the number of connection nodes and also can reduce the transportation cost without exceeding the limit; the flange connection between the new eight-bar structure and the center tower of the crane can increase the height of the center tower according to the requirements under the conditions of meeting the strength and stability, and can enhance the adaptability of the crane.

[0041] The embodiment also provides a portal crane, which comprises the double-layer split eight-bar structure described above. Since the portal crane is provided with the double-layer split eight-bar structure described above, the portal crane also has all the advantages described above.

[0042] It is also important to note that the word "comprising" does not specify the presence of only the listed components or steps nor does it imply that other parts or steps can not be present. In a preferred embodiment of the application, each of the first and second entities or operations is a distinct entity or operation.

[0043] The above description is merely illustrative of the application, and is not intended to limit the scope of the application that is defined by the appended claims. Many variations and modifications of the application can be made by those skilled in the art without departing from the spirit and scope of the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall fall within the scope of the application.

Claims

1. A double-layer segmented eight-bar structure, characterized in that, The system includes a central tower, upper circular tube main members, and a lower plate structure. The bottom of the central tower is connected to eight upper circular tube main members arranged in a positive conical shape. Two upper circular tube main members on the same side of the central tower are arranged in an inverted V shape, and two upper circular tube main members on adjacent sides of the central tower are arranged in a positive V shape. The lower plate structure consists of four plate components arranged in a positive conical shape. The top of each plate component is connected to the bottom of two upper circular tube main members arranged in a positive V shape via a flange. The central tower is welded together from connecting flanges, first main members, K-shaped web members and steel beams; the first main members include four members, which are of equal length and arranged in parallel. A first connecting flange is welded to the top and bottom of each first main member. Adjacent first main members are welded together by K-shaped web members and steel beams, so that the K-shaped web members and steel beams form a whole on the four planes of the central tower. The upper circular tube main member is welded with a second connecting flange at both the top and bottom. The second connecting flange at the top is connected to the steel beam of the central tower, and the second connecting flange at the bottom is connected to the lower plate structure. The plate-type assembly is formed by welding a second main limb and a triangular web member into a tetrahedral structure, wherein the upper end of the second main limb is forked, and the triangular web member is used for connecting adjacent plate-type assemblies; The upper end of the second main member is connected to the lower part of the two round pipe main members of the upper layer in a positive V shape through the third connecting flange, and the lower end of the second main member is connected to the gantry through the fourth connecting flange.

2. The double-layer segmented eight-bar structure as described in claim 1, characterized in that, The first connecting flange at the top of the first main member connects to the standard section of the crane tower body, and the first connecting flange at the bottom connects to the foundation section of the crane tower body.

3. The double-layer segmented eight-bar structure as described in claim 1, characterized in that, The K-shaped web member is located on the upper part of the adjacent first main member; the steel beam is located on the lower part of the adjacent first main member.

4. The double-layer segmented eight-bar structure as described in claim 1, characterized in that, Adjacent steel beams are connected by connecting rods.

5. The double-layer segmented eight-bar structure as described in claim 1, characterized in that, The triangular web members of adjacent plate-type components are connected by a fifth connecting flange.

6. A gantry crane, characterized in that, Includes the double-layer segmented eight-bar structure as described in any one of claims 1-5.

Images