Novel six-petal grab bucket of gantry crane

Abstract

The utility model discloses a novel six-petal grab bucket of a gantry crane. The four sides of the stress part, connected with a bucket body, of each jaw supporting beam are welded by 16Mn first steel plates with the thickness of 10mm; a 16Mn second steel plate in the form of a crescent plate with the length of 300mm and the width of 100mm is welded at the bending joint of each jaw flap and the jaw flap supporting beam for reinforcement; the two sides of each jaw are connected with HARDOX 500 wear-resistant strips of 30 mm * 30 mm; a 1050mm * 1200mm trapezoid is additionally welded on the inner side of each jaw, close to the tip of the bucket, the radian of the trapezoid is consistent with that of the jaw, the jaw mother plate is completely covered, and the HARDOX 500 wear-resistant plate is 8mm thick. According to the structure, the jaw flap supporting beam stress point part reinforcing technology is optimized, the bent connecting position of each jaw flap and the jaw flap supporting beam is reinforced, stress deformation of the stress points is effectively prevented, and the leakproofness is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of the structure of portal cranes, and particularly relates to a new type of six-lobe grab for portal cranes. Background Art

[0002] When the traditional six-lobe grab of a portal crane grabs and transports materials such as ores and coals, it will be subjected to strong impacts and frictions. Especially when grabbing materials with higher hardness, parts such as the bucket wall and bucket teeth of the grab are extremely easy to wear. Although the materials of the traditional six-lobe grab have certain wear resistance, under long-term and high-intensity operations, the wear speed is relatively fast, and it needs to be replaced frequently, increasing the maintenance cost and downtime.

[0003] In addition, after the six-lobe grab grabs materials, it needs to maintain a certain tightness to prevent the materials from scattering during transportation. However, after long-term and high-intensity use, some stress points of the six-lobe grab are prone to stress deformation, thus affecting the tightness of the six-lobe grab. Insufficient tightness will cause the materials to scatter, not only causing waste, but also possibly polluting the environment. In addition, the scattered materials may also cause secondary wear to the equipment, accelerating the aging of the equipment. Content of the Utility Model

[0004] Aiming at the problems of easy wear and tightness pointed out in the above background art, the purpose of the utility model is to provide a new type of six-lobe grab for portal cranes to improve the wear resistance and tightness of the six-lobe grab.

[0005] To achieve the above purpose, the technical solution provided by the utility model is as follows:

[0006] For a new type of six-lobe grab of a portal crane, 16Mn first steel plates with a thickness of 10 mm are welded on the four sides of the stress-bearing part where each jaw flap support beam is connected to the bucket body;

[0007] At the bending connection of each jaw flap and the jaw flap support beam, 16Mn second steel plates in the form of crescent plates with a length of 300 mm and a width of 100 mm are welded for reinforcement;

[0008] On both sides of each jaw flap, 30 mm x 30 mm HARDOX 500 wear-resistant strips are connected;

[0009] A trapezoidal HARDOX 500 wear-resistant plate with a size of 1050 mm x 1200 mm, consistent with the arc of the jaw flap, completely covering the mother plate of the jaw flap and with a thickness of 8 mm is welded near the bucket tip on the inner side of each jaw flap.

[0010] Wherein, anti-overlapping flap stoppers extending 10 cm outward from the grab are provided at the upper ends on both sides of each jaw flap, and the anti-overlapping flap stoppers are perpendicularly welded to the wear-resistant strips. When the grab closes, the anti-overlapping flap stoppers at corresponding positions on adjacent jaw flaps are in close contact.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. Optimize the stress point part of the jaw flap support beam in terms of structure and strengthen the process. Reinforce the bending connection between each jaw flap and the jaw flap support beam, effectively preventing the stress point from deforming under stress and improving the tightness.

[0013] 2. Excellent wear resistance: The structural design of these wear-resistant strips and wear-resistant plates greatly improves the hardness and toughness of the wear-resistant layer. During the working process of the six-flap grab, the wear-resistant layer can effectively resist the wear of hard objects such as coal and ore, thus greatly extending the service life of the grab.

[0014] 3. Improve work efficiency: Due to the wear resistance of the wear-resistant strips and wear-resistant plates, the six-flap grab can maintain a high work efficiency during operation, reduce the downtime caused by grab wear and replacement, and thus improve the economic benefits of the whole ship.

[0015] 4. Reduce maintenance costs: Since the wear-resistant strips and wear-resistant plates have a long service life, the number of repairs and replacements can be reduced, thereby reducing maintenance costs. In addition, due to their wear resistance, the downtime and repair time caused by equipment wear can be reduced, further reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic side view structure diagram of a single jaw flap provided by an embodiment of the present application;

[0017] Figure 2 It is a schematic top view structure diagram of a single jaw flap provided by an embodiment of the present application;

[0018] Figure 3 It is a partial top view structure diagram of a six-flap grab provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0021] In the description of this patent, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection", "setting" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set, and can refer to direct connection or indirect connection. For those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0022] Please refer to Figures 1-3 as shown, which is the structural embodiment provided by the present utility model.

[0023] A new type of six-lobe grab of a portal crane provided by this embodiment has been improved in structure, specifically as follows:

[0024] On the four sides of the stress-bearing part where each jaw lobe support beam is connected to the bucket body, 16Mn first steel plates 1 with a thickness of 10 mm are welded;

[0025] At the bending connection of each jaw lobe and the jaw lobe support beam, 16Mn second steel plates 2 in the form of welded crescent plates with a length of 300 mm and a width of 100 mm are used for reinforcement;

[0026] The main purpose of the above two structural improvements is to effectively prevent the jaw lobes from deforming under stress when grabbing materials, forming gaps between adjacent jaw lobes, causing material leakage, and improving the tightness of the six-lobe grab.

[0027] In addition, 30mmx30mm HARDOX 500 wear-resistant strips 3 are used on both sides of each jaw lobe. Among them, HARDOX 500 is a wear-resistant steel plate with a Brinell hardness of 500 HB, which is mainly applied to anti-wear working conditions;

[0028] A 1050mmx1200mm trapezoidal HARDOX 500 wear-resistant plate 4 with the same arc as the jaw lobe and a thickness of 8 mm is welded near the bucket tip on the inner side of each jaw lobe, completely covering the mother plate of the jaw lobe.

[0029] In a preferred embodiment, anti-overlapping flap stoppers 5 extending 10 cm outward from the grab are provided at the upper ends on both sides of each jaw flap. The anti-overlapping flap stoppers 5 are vertically welded to the wear-resistant strips. When the grab closes, the anti-overlapping flap stoppers 5 at corresponding positions on adjacent jaw flaps are closely attached. There are a total of 6 pairs of such stoppers on the entire grab. Their main purpose is that after the six-lobe grab is used for a period of time, the nylon bushings of the jaw flap struts will wear, resulting in misalignment of the closing gaps between the jaw flaps and the other jaw flaps. As the wear intensifies, the misalignment becomes more serious, eventually leading to flap overlapping. When the stoppers are installed, the misalignment of the gaps between the jaw flaps is restricted, keeping the misalignment of the jaw flaps within a relatively small range, and at the same time reducing the wear of the nylon bushings.

[0030] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and all such changes and improvements fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of six-petal grab bucket for portal crane, characterized in that: The four sides of the stress-bearing part where each jaw support beam is connected to the bucket body are welded with a 10 mm thick 16Mn first steel plate (1); A 16Mn second steel plate (2) in the form of a 300 mm long and 100 mm wide crescent plate is welded to reinforce the bent connection between each jaw flap and the jaw flap support beam; Connect 30mm x 30mm HARDOX 500 wear strips (3) on both sides of each jaw; A 1050mm x 1200mm trapezoidal HARDOX 500 wear-resistant plate (4) with a thickness of 8mm and the same curvature as the jaw flap and completely covering the jaw flap mother plate is welded to the inner side of each jaw flap near the bucket tip.

2. The novel six-petal grab bucket of portal crane according to claim 1 is characterized in that: An anti-flap stopper (5) extending 10 cm outward from the grab bucket is provided at the upper ends of both sides of each jaw flap. The anti-flap stopper (5) is vertically welded to the wear-resistant strip. When the grab bucket is closed, the anti-flap stopper (5) at corresponding positions on two adjacent jaw flaps fit tightly together.

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