Stabilizing structure of single-beam grab crane

Abstract

The utility model provides a stabilizing structure of a single-beam grab crane, which comprises a main beam and auxiliary beams arranged on the two sides of the main beam, the auxiliary beams are fixed on the side edges of the main beam in parallel through a plurality of fixing frames, the auxiliary beams on the two sides of the main beam are located on the same horizontal plane after being installed, a crane hanger rail parallel to the main beam is arranged below the main beam, and the main beam is fixed on the crane hanger rail. The main body of the crane is connected with the crane hanger rail in a sliding manner, the crane is fixedly arranged on the crane outer frame, supporting legs are respectively welded and fixed at four corners of the crane outer frame, the end parts of the supporting legs are connected with supporting leg small wheels, and the supporting leg small wheels can freely slide along the length direction of the auxiliary beam. The steel wire rope winding device is simple in structure, convenient to install and low in manufacturing cost, can reduce shaking and vibration when the grab bucket crane hoists heavy objects during use, guarantees normal winding of the steel wire rope, guarantees working efficiency, and has high popularization value.

Description

Technical Field

[0001] The utility model relates to the technical field of crane devices, and particularly relates to a stable structure of a single-girder grab crane. Background Art

[0002] Single-girder cranes are widely used in scenarios such as material warehouses, port terminals, iron and steel chemical industries, railway transportation, and logistics turnover due to their advantages of simple structure, light weight, convenient installation and maintenance, and low cost. They are one of the most widely used and numerous machinery. Although single-girder cranes have strict usage specifications, when lifting heavy objects, due to their simple single-girder structure, problems such as shaking, vibration, wire rope derailment, and even derailment often occur, affecting work efficiency and posing safety hazards. Different usage scenarios and different lifting tools have varying degrees of impact on the disadvantages of single-girder cranes.

[0003] When a single-girder grab crane uses a grab as a lifting tool, during the process of the grab being lowered to grab materials and then lifted to raise the materials, due to the rapid change of the center of gravity and large deviation angle, the crane is more likely to shake, and its wire rope is more likely to derail, or even derail and knot. Especially when the grab needs to work underwater, the impact is even greater, seriously reducing work efficiency and causing the crane to need frequent shutdowns for maintenance.

[0004] Therefore, we propose a stable structure for a single-girder grab crane to solve the above-mentioned problems existing in the prior art. Content of the Utility Model

[0005] The purpose of the utility model is to provide a stable structure for a single-girder grab crane to solve problems such as large shaking and vibration frequencies and easy derailment or knotting of wire ropes during the operation of existing grab cranes.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: A stable structure of a single-girder grab crane includes a main girder and auxiliary girders installed on both sides of the main girder. The auxiliary girders are fixedly parallel to the side of the main girder through multiple fixed frames, and the auxiliary girders on both sides of the main girder are on the same horizontal plane after installation. A crane rail parallel to the main girder is arranged below the main girder, and the main body of the crane is slidably connected to the crane rail. The crane is fixedly installed on the crane outer frame. Support feet are respectively welded and fixed at the four corners of the crane outer frame, and the end of the support foot is connected with a support foot trolley wheel, and the support foot trolley wheel can freely slide along the length direction of the auxiliary girder.

[0007] Furthermore, the auxiliary girder is composed of multiple I-beams spliced together, and adjacent I-beams are connected through flange plates. The flange plates are fixedly connected to the left and right I-beams through high-strength bolts.

[0008] Further, the fixing frame is made of steel structure and is fixed to both the main beam and the auxiliary beam by welding.

[0009] Further, the fixing frame includes an end fixing frame and an intermediate fixing frame. The two ends of the auxiliary beam are fixedly connected to the main beam through the end fixing frame, and the auxiliary beam is fixedly connected to the main beam through the intermediate fixing frame at other positions except the two ends.

[0010] Further, the connecting ends of the end fixing frame, the intermediate fixing frame and the main beam are respectively provided with rib plates. The rib plate on the end fixing frame is arranged towards the intermediate fixing frame, and the rib plate on the intermediate fixing frame is vertically connected to the bottom of its main body.

[0011] Further, a trolley wheel frame is fixedly welded to the surface of the end of the support leg far away from the outer frame of the crane. A trolley wheel shaft is installed on the trolley wheel frame. The support leg trolley wheel is installed on the trolley wheel shaft and can rotate freely on the trolley wheel shaft.

[0012] Further, a rib plate is welded between the support leg and the bottom steel plate of the trolley wheel frame.

[0013] Further, an anti-rust paint layer is sprayed on the outer surface of the stabilizing structure.

[0014] After adopting the above technical solutions, compared with the existing technologies, the following beneficial effects are achieved: simple structure, convenient installation, low manufacturing cost, capable of reducing the swaying and vibration of the grab crane when lifting heavy objects during use, ensuring the normal winding of the steel wire rope, guaranteeing the working efficiency, and having great popularization value. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 is the structural schematic diagram of the present invention;

[0017] Figure 2 is the partial structural schematic diagram of the present invention;

[0018] Figure 3 is the partial structural schematic diagram of the auxiliary beam 2 in the present invention;

[0019] Figure 4 is the connection structural schematic diagram of the support leg 61 and the support leg trolley wheel 62 in the present invention;

[0020] Figure 5 It is a schematic diagram of the connection structure of the middle fixing frame 31, the intermediate fixing frame 32 and the main beam 1 of the present utility model;

[0021] Figure 6 It is a schematic diagram of the structure of the end fixing frame 31 of the present utility model;

[0022] Figure 7 It is a schematic diagram of the structure of the intermediate fixing frame 32 of the present utility model.

[0023] Explanation of reference numerals: 1, main beam; 2, auxiliary beam; 21, I-beam; 22, flange plate; 221, high-strength bolt; 3, fixing frame; 31, end fixing frame; 32, intermediate fixing frame; 321, rib plate; 4, crane trolley rail; 5, crane; 6, crane outer frame; 61, support foot; 611, trolley wheel frame; 612, trolley wheel shaft; 62, support foot trolley wheel; 7, end beam. Detailed implementation manners

[0024] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0025] Aiming at the problems existing in the prior art, the present utility model provides a stable structure for a single-girder grab crane, and the present utility model will be described in detail below with reference to the accompanying drawings.

[0026] Referring to Figures 1-7 As shown, the technical solution adopted in this specific implementation manner is: a stable structure for a single-girder grab crane, including a main beam 1 and auxiliary beams 2 installed on both sides of the main beam 1. The auxiliary beams 2 are welded and fixed to the side of the main beam 1 through a plurality of fixing frames 3, and the auxiliary beams 2 on both sides of the main beam 1 are located on the same horizontal plane after installation. The fixing frame 3 is made of steel structure, and its two ends are respectively fixed to the main beam 1 and the auxiliary beam 2 by welding. The number of the fixing frames 3 is determined by the length of the main beam 1, and they are welded to the main beam 1 at equal intervals.

[0027] A crane rail 4 is provided below the main beam 1. The main body of the crane 5 is slidably connected to the crane rail 4. The crane 5 is fixedly installed on the outer frame 6 of the crane. Support feet 61 are respectively welded and fixed at the four corners of the outer frame 6 of the crane. The support feet 61 are also made of steel structure. After installation, the support feet 61 should be on the same plane as the auxiliary beam 2 on the same side. A support foot trolley wheel 62 is installed at the end of the support foot 61. The support foot trolley wheel 62 is slidably connected to the auxiliary beam 2 and can freely slide along the length direction of the auxiliary beam 2 without affecting the movement of the crane 5. After installation, all the support foot trolley wheels 62 should have no gap with the auxiliary beam 2. Specifically, a trolley wheel frame 611 is welded and fixed on the surface of the end of the support foot 61 away from the outer frame 6 of the crane. A trolley wheel shaft 612 is installed on the trolley wheel frame 611. The support foot 61 is installed on the trolley wheel shaft 612 and can freely rotate on the trolley wheel shaft 612.

[0028] It should be specifically noted that a rib plate 321 is welded between the support foot 61 and the bottom steel plate of the trolley wheel frame 611.

[0029] It should be specifically noted that the auxiliary beam 2 is composed of a plurality of I-beams 21 spliced together. Adjacent I-beams 21 are connected by flange plates 22. Both sides of the flange plate 22 are respectively fixedly connected to the left and right I-beams 22 through a plurality of high-strength bolts 221.

[0030] It should be specifically noted that after welding, the fixing frame 3 should not affect the movement of the crane 5 on the main beam 1 and the auxiliary beam 2. And because the welding positions on the main beam 1 are different, the fixing frame 3 is subjected to different forces. Therefore, it is divided into an end fixing frame 31 and an intermediate fixing frame 32. The connecting ends of the end fixing frame 31 and the intermediate fixing frame 32 to the main beam 1 are respectively provided with rib plates 321. The main difference between the end fixing frame 31 and the intermediate fixing frame 32 lies in the different positions where the rib plates 321 are welded. Specifically, both ends of the auxiliary beam 2 are fixedly connected to the main beam 1 through the end fixing frame 31. The rib plate 321 on the end fixing frame 31 faces the intermediate fixing frame 32. Other positions of the auxiliary beam 2 except at both ends are fixedly connected to the main beam 1 through the intermediate fixing frame 32. The rib plate 321 on the intermediate fixing frame 32 is perpendicular to the bottom of its main body.

[0031] The stable structure of this application should be entirely made of steel. After the overall installation of the stable structure, an anti-rust paint layer (not marked in the figure) is sprayed on its outer surface to improve the overall service life. On the premise of meeting the bearing capacity, this stable structure can effectively reduce the sway generated when the single-girder grab crane grabs and hoists heavy objects, ensuring the normal winding of the wire rope. At the same time, this stable structure does not change the original overall structure of the single-girder crane, does not increase the stress on the end beam 7, occupies little space, and is especially suitable for scenarios with limited space. The stable structure of this single-girder grab crane can be divided into two parts for separate installation. Specifically, the first part is the auxiliary beam 2 and the fixing frame 3, and the second part is the support foot 61 and the support foot trolley wheel 62. Both parts can be pre-assembled and then welded to the main beam 1 and the crane 5. The overall installation is convenient, the construction time is short, the transformation cost is low, and the impact on production operations is small.

[0032] The specific installation process of the stable structure is as follows:

[0033] I. Splicing of the auxiliary beam 2

[0034] a. According to the design, select a suitable I-beam 21. Its length should not be too long to avoid deformation during installation. Measure the web of the I-beam 21 required for the auxiliary beam 2, determine the reserved hole positions for the high-strength bolts 221, and fabricate the flange plates 22 for the corresponding hole positions.

[0035] b. Adopt the method of clamping with double flange plates. Clamp the two flange plates 22 from both sides of the web, install the high-strength bolts 221 to tightly connect the two sections of the I-beam 21, and connect all the I-beams 21 in sequence to complete the splicing of the auxiliary beam 2. The overall length of the auxiliary beam 2 should be slightly longer than the travel of the crane 5 on the main beam 1 and shorter than the length of the main beam 1. For the spliced auxiliary beam 2, it is necessary to ensure that the surface of its wing plate is flat, there is no offset at the connection of the high-strength fastening bolts 221, and the auxiliary beam 2 is free of bending and deformation.

[0036] II. Welding of the fixing frame 3

[0037] c. Layout the welding positions of each fixing frame 3 on the auxiliary beam 2. The welding position of the fixing frame 3 and the auxiliary beam 2 should be on the upper wing plate of the auxiliary beam to avoid affecting the rolling of the support foot trolley wheel 62 on the lower wing plate of the auxiliary beam 2, and avoid the connection of the high-strength bolts 221. Then weld each fixing frame 3 in sequence.

[0038] d. Check whether there is any damage to the lower wing plate of the auxiliary beam 2 and whether all the fixing frames 3 are at the same height. After confirming that each fixing frame 3 is welded correctly, weld the steel plates in sequence to ensure the structural strength of the first part.

[0039] III. Assembly of the support foot 61 and the support foot trolley wheel 62

[0040] e. Place the webs of two channel steels facing each other, with the flanges facing outwards, and vertically weld them to a steel plate. Drill holes at the center of the webs to form the trolley wheel frame 611.

[0041] f. Install the support foot trolley wheels 62 on the trolley wheel frame 611, and the support foot trolley wheels 62 can rotate freely.

[0042] g. The support foot 61 is a section of I-beam structure. Weld it below the steel plate of the trolley wheel frame 611, and its web should be perpendicular to the trolley wheel shaft 612.

[0043] h. Weld the rib plates 321 between the two sides of the web of the support foot 61 and the bottom steel plate of the trolley wheel frame 611.

[0044] IV. Overall installation of the stable structure

[0045] i. Weld the four support feet 61 with the wheels facing upwards to the four corners of the outer frame 6 of the crane respectively, ensuring that the wheels of the four support feet 61 are at the same height.

[0046] j. Check whether the upper surfaces of the support foot trolley wheels 62 on the same side are at the same height, whether the center lines of the support foot trolley wheels 62 on the same side are parallel to the auxiliary beam 2, and whether the height difference between the support foot trolley wheels 62 on both sides is less than 5 mm.

[0047] k. Taking the height of the support foot trolley wheels 62 as the reference, move the crane 5 to the two ends and the middle three positions of the main beam 1 respectively. Loft the installation height of the auxiliary beam 2 at the three positions respectively. Taking the highest lofting point as the standard, mark the welding positions of the fixing frames 3.

[0048] l. Use three slings to lift one side of the auxiliary beam 2 over the main beam 1 to the lofted height. Start welding the fixing frames 3 from both ends. Weld the other side of the auxiliary beam 2 in the same way. After checking and confirming, weld the rib plates 321 to all the fixing frames 3 respectively. Due to different stress positions, after welding the rib plates 321 to the fixing frames 3 at both ends, end fixing frames 31 are formed, and after welding the rib plates 321 to the fixing frames 3 other than those at both ends, intermediate fixing frames 32 are formed.

[0049] m. Spray a layer of anti-rust paint on the outer surface of the entire stable structure.

[0050] In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 invention.

[0051] As described above, it is only used to illustrate the technical solution of the present utility model rather than to limit it. Any other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of the present utility model shall be covered within the scope of the claims of the present utility model as long as they do not depart from the spirit and scope of the technical solution of the present utility model.

Claims

1. A single-beam grab crane stabilizing structure, characterized in that: It includes a main beam and auxiliary beams installed on both sides of the main beam. The auxiliary beams are fixed in parallel to the sides of the main beam through multiple fixing frames, and the auxiliary beams on both sides of the main beam are located on the same horizontal plane after installation. A crane hanging rail parallel to the main beam is arranged below the main beam, and the main body of the crane is slidably connected to the crane hanging rail. The crane is fixedly installed on the outer frame of the crane, and supporting feet are respectively welded and fixed at the four corners of the outer frame of the crane. The ends of the supporting feet are connected to supporting foot wheels, and the supporting foot wheels can slide freely along the length direction of the auxiliary beam.

2. The single-beam grab crane stabilizing structure according to claim 1 is characterized in that: The auxiliary beam is formed by splicing a plurality of I-beams, and adjacent I-beams are connected by flange plates, and the flange plates are fixedly connected to the left and right I-beams by high-strength bolts.

3. The single beam grab crane stabilizing structure according to claim 1, characterized in that: The fixing frame is a steel structure and is fixed to the main beam and the auxiliary beam by welding.

4. The single-beam grab crane stabilizing structure according to any one of claims 1 or 3, characterized in that: The fixing frame includes an end fixing frame and an intermediate fixing frame. The two ends of the auxiliary beam are fixedly connected to the main beam through the end fixing frames, and the auxiliary beam is fixedly connected to the main beam at other positions other than the two ends through the intermediate fixing frame.

5. The single-beam grab crane stabilizing structure according to claim 4, characterized in that: The connecting ends of the end fixing frame, the middle fixing frame and the main beam are respectively provided with ribs, the ribs on the end fixing frame are arranged toward the middle fixing frame, and the ribs on the middle fixing frame are vertically connected to the bottom of the main body.

6. The single-beam grab crane stabilizing structure according to claim 1, characterized in that: A trolley wheel frame is welded and fixed to the surface of one end of the support foot away from the outer frame of the crane, a trolley wheel axle is installed on the trolley wheel frame, and the support foot trolley wheel is installed on the trolley wheel axle and can rotate freely on the trolley wheel axle.

7. The single-beam grab crane stabilizing structure according to claim 6, characterized in that: A rib plate is welded between the supporting foot and the bottom steel plate of the trolley wheel frame.

8. The single beam grab crane stabilizing structure according to claim 1, characterized in that: The outer surface of the stabilizing structure is sprayed with an anti-rust paint layer.

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