Large cantilever reinforced portal crane

Abstract

The utility model discloses a large cantilever reinforced portal crane which comprises a portal frame, rigid supporting legs are symmetrically arranged on the two sides, close to one end, of the bottom of the portal frame, and flexible supporting legs are symmetrically arranged on the two sides, close to the other end, of the bottom of the portal frame; the portion, extending out of the rigid supporting leg, of the portal is a first cantilever, and the portion, extending out of the flexible supporting leg, of the portal is a second cantilever. A diagonal brace is arranged between the bottom end of the rigid supporting leg and the end, away from the rigid supporting leg, of the first cantilever, the top end of the diagonal brace is welded to the first cantilever through an upper connecting plate, and the bottom end of the diagonal brace is welded to the rigid supporting leg through a lower connecting plate. Aiming at a structure with a longer cantilever at one end, the portal crane disclosed by the utility model ensures the structural strength of the cantilever, reduces the cost and ensures the structural safety under the condition that the cross section of the main beam is not increased.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a large-cantilever reinforced gantry crane. Background Art

[0002] The gantry crane is a deformation of the bridge crane, also known as the gantry crane. It is mainly used for the loading and unloading operations of outdoor freight yards, material yards, and bulk goods. The gantry crane has the characteristics of high site utilization rate, large operation range, wide adaptability, strong versatility, etc., and is widely used in port freight yards.

[0003] According to the usage requirements of customers, the cantilever length at one end of the gantry crane is relatively long. The part where the main beam extends out of the outrigger is the cantilever. Usually, the strength of the main beam within the span is sufficient, but the strength of the main beam of the cantilever part is insufficient. Therefore, only the cross-section of the main beam can be increased to meet the strength requirements of the cantilever. At this time, the strength of the main beam within the span far exceeds the requirements. The increase in the weight of the main beam results in a relatively heavy weight of the entire gantry, increasing the cost of the crane and having a certain impact on the structural safety of the crane. Summary of the Utility Model

[0004] In view of the above defects or deficiencies in the prior art, it is desirable to provide a large-cantilever reinforced gantry crane. For the structure with a relatively long cantilever at one end, without increasing the cross-section of the main beam, the structural strength of the cantilever is ensured, the cost is reduced, and the structural safety is ensured.

[0005] A large-cantilever reinforced gantry crane provided by the utility model includes a gantry; rigid outriggers are symmetrically arranged on both sides of the bottom of the gantry near one end, and flexible outriggers are symmetrically arranged on both sides of the bottom of the gantry near the other end;

[0006] The part where the gantry extends out of the rigid outrigger is the first cantilever, and the part that extends out of the flexible outrigger is the second cantilever; a stay cable is arranged between the bottom end of the rigid outrigger and the end of the first cantilever far from the rigid outrigger. The top end of the stay cable is welded and connected to the first cantilever through an upper connecting plate, and the bottom end is welded and connected to the rigid outrigger through a lower connecting plate.

[0007] Furthermore, an upper reinforcing plate is welded and connected between the upper connecting plate and the first cantilever; a lower reinforcing plate is welded and connected between the lower connecting plate and the rigid outrigger.

[0008] Furthermore, the gantry includes two main beams and two upper cross beams. The two main beams are arranged in parallel, and the two ends between the two main beams are fixedly connected through the upper cross beams.

[0009] Furthermore, lower cross beams are fixedly connected between the bottoms of the two rigid legs and between the bottoms of the two flexible legs respectively, and traveling wheel mechanisms are arranged at both ends of the bottom of the lower cross beam.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] In the crane of the present utility model, a relatively long cantilever is designed at one end of the rigid leg, and a stay bar is arranged between the rigid leg and the relatively long cantilever, which improves the structural strength of this section of the cantilever. Without increasing the cross-section of the main beam, it ensures that the structural strength of the cantilever meets the use requirements, reduces the cost, and ensures the structural safety of the crane.

[0012] It should be understood that the content described in the utility model content part is not intended to limit the key or important features of the embodiments of the present utility model, nor to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, purposes, and advantages of the present utility model will become more obvious:

[0014] Figure 1 FIG. is a structural schematic diagram of a large-cantilever reinforced gantry crane;

[0015] Figure 2 FIG. is a side structural schematic diagram of a large-cantilever reinforced gantry crane;

[0016] Figure 3 FIG. is a connection structural schematic diagram of the stay bar.

[0017] Reference numerals in the figures: 1, gantry; 2, rigid leg; 3, flexible leg; 4, stay bar; 5, lower cross beam; 6, traveling wheel mechanism;

[0018] 11, first cantilever; 12, second cantilever; 13, main beam; 14, upper cross beam

[0019] 41, upper connecting plate; 42, lower connecting plate; 43, upper reinforcing plate; 44, lower reinforcing plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. In addition, it should be noted that for the convenience of description, only the parts related to the utility model are shown in the drawings.

[0021] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0022] Please refer to Figures 1 to 3 , an embodiment of the present utility model provides a large cantilever reinforced gantry crane, which includes a gantry 1; on both sides near one end of the bottom of the gantry 1, rigid legs 2 are symmetrically arranged, and on both sides near the other end of the bottom of the gantry 1, flexible legs 3 are symmetrically arranged;

[0023] The part of the gantry 1 extending beyond the rigid leg 2 is the first cantilever 11, and the part extending beyond the flexible leg 3 is the second cantilever 12; between the bottom end of the rigid leg 2 and the end of the first cantilever 11 far from the rigid leg 2, a stay bar 4 is arranged. The top end of the stay bar 4 is welded and connected to the first cantilever 11 through an upper connecting plate 41, and the bottom end is welded and connected to the rigid leg 2 through a lower connecting plate 42.

[0024] In this embodiment, the length of the gantry 1 of the gantry crane is L, the length of its first cantilever 11 is L1, and the length of its second cantilever 12 is L2. The length of the first cantilever 11 is longer to meet the user's usage requirements.

[0025] The first cantilever 11 is arranged at one end of the rigid leg 2, and the stay bar 4 is arranged between the rigid leg 2 and the first cantilever 11 to support the first cantilever 11, effectively improving the structural strength of the first cantilever 11. Without increasing the cross-section of the main beam 13, it ensures that the structural strength of the first cantilever 11 meets the usage requirements, reduces costs, and ensures the structural safety of the crane.

[0026] In a preferred embodiment, as Figure 1 and Figure 3 shown, an upper reinforcing plate 43 is welded and connected between the upper connecting plate 41 and the first cantilever 11; a lower reinforcing plate 42 is welded and connected between the lower connecting plate 42 and the rigid leg 2, effectively improving the connection strength of the stay bar 4 and ensuring the structural strength of the first cantilever 11.

[0027] In a preferred embodiment, as Figure 1 and Figure 3 shown, the gantry 1 includes two main beams 13 and two upper cross beams 14. The two main beams 13 are arranged in parallel, and both ends between the two main beams 13 are fixedly connected through the upper cross beams 14.

[0028] In this embodiment, the gantry 1 is composed of two main beams 13 and two upper cross beams 14. The parts of the two main beams 13 extending beyond the rigid legs 2 and the upper cross beam 14 at the same end form the first cantilever 11. Under the action of the stay bar 4, without increasing the cross-section of the main beam 13, it can ensure that the structural strength of the first cantilever 11 meets the requirements.

[0029] In a preferred embodiment, as Figure 1 and Figure 2 shown, lower cross beams 5 are fixedly connected between the bottom ends of two rigid legs 2 and between the bottom ends of two flexible legs 3 respectively, ensuring the strength of the overall frame structure of the crane; traveling wheel mechanisms 6 are respectively arranged at both ends of the bottom of the lower cross beam 5 to drive the crane to move along the track.

[0030] In the description of this specification, terms such as "connection", "installation", "fixation", etc. should all be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0032] The above are only the preferred embodiments of this application and are not used to limit this application. For those skilled in the art, various changes and modifications can be made to this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. A large cantilever reinforced gantry crane, characterized in that, It includes a gantry (1); on both sides near one end of the bottom of the gantry (1), rigid legs (2) are symmetrically arranged, and on both sides near the other end of the bottom of the gantry (1), flexible legs (3) are symmetrically arranged; The part of the gantry (1) extending beyond the rigid leg (2) is the first cantilever (11), and the part extending beyond the flexible leg (3) is the second cantilever (12); between the bottom end of the rigid leg (2) and the end of the first cantilever (11) away from the rigid leg (2), a stay bar (4) is arranged. The top end of the stay bar (4) is welded to the first cantilever (11) through an upper connecting plate (41), and the bottom end is welded to the rigid leg (2) through a lower connecting plate (42).

2. The large-cantilever reinforced gantry crane according to claim 1, characterized in that, An upper reinforcing plate (43) is welded between the upper connecting plate (41) and the first cantilever (11); a lower reinforcing plate (44) is welded between the lower connecting plate (42) and the rigid leg (2).

3. The large-cantilever reinforced gantry crane according to claim 1, wherein The gantry (1) includes two main beams (13) and two upper cross beams (14). The two main beams (13) are arranged in parallel, and the two ends between the two main beams (13) are fixedly connected through the upper cross beams (14) respectively.

4. The large cantilever reinforced gantry crane according to claim 1, characterized in that, Between the bottom ends of the two rigid legs (2) and between the bottom ends of the two flexible legs (3), lower cross beams (5) are fixedly connected respectively. At both ends of the bottom of the lower cross beam (5), traveling wheel mechanisms (6) are arranged respectively.

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