A large-tonnage gantry crane's outrigger structure

Abstract

The utility model provides a kind of large-tonnage portal crane's supporting leg structure, including rigid supporting leg, flexible supporting leg and the main beam of connecting rigid supporting leg and flexible supporting leg;Rigid supporting leg includes two symmetrically arranged first supporting legs, the upper end of two first supporting legs is provided with first support seat, the downside middle part of first support seat is provided with inverted V-shaped gap, the inclined side surface of the both sides of inverted V-shaped gap is opposite to the side surface of first supporting leg and is located in the same plane;The lower end of two first supporting legs is connected by first ground beam, and the downside of first ground beam is provided with travelling trolley;Flexible supporting leg includes two symmetrically arranged second supporting legs, the top of two second supporting legs is provided with wedge-shaped gap correspondingly, two wedge-shaped gaps are docked, the lower end of two second supporting legs is connected by second ground beam, and the upper end of two second supporting legs is provided with second support seat.The large-tonnage portal crane's supporting leg structure is more stable, and the bearing capacity is stronger, not easy to deform, suitable for being applied to large-tonnage portal crane.

Description

Technical Field

[0001] This utility model relates to a crane accessory, specifically, to a leg structure for a large-tonnage gantry crane. Background Technology

[0002] Gantry cranes are a type of bridge crane, also known as portal cranes, and are mainly used for loading and unloading cargo and bulk materials in outdoor freight yards and material yards. Gantry cranes are characterized by high site utilization, large operating range, wide adaptability, and strong versatility, and are widely used in port freight yards.

[0003] The load-bearing capacity of gantry cranes relies on the outrigger mechanism of the gantry frame. Currently, the outrigger structure of most gantry cranes on the market includes an upper beam (also known as an upper support), a lower crossbeam (also known as a ground beam), and inclined outriggers connecting the upper beam and the lower crossbeam. For example, Chinese Patent CN209635744U discloses a large-span prestressed main beam gantry crane, Chinese Patent CN119589593A discloses a tooling and method for assembling a gantry crane using a forklift, and Chinese Patent CN214399537U discloses a semi-gantry crane for a circular track. The upper beam, lower crossbeam, and outriggers of these gantry cranes form a trapezoidal structure. During heavy lifting, the upper beam is subjected to uneven load, and the force is difficult to be fully transmitted to the outriggers, making the upper beam prone to deformation.

[0004] In order to solve the above problems, people have been seeking an ideal technological solution. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by providing a support leg structure for a large-tonnage gantry crane.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A leg structure for a large-tonnage gantry crane includes rigid legs, flexible legs, and a main beam connecting the rigid and flexible legs. The rigid legs include two symmetrically arranged first legs, each with a first support seat at its upper end. An inverted V-shaped notch is located in the lower center of the first support seat, with the inclined sides of the inverted V-shaped notch and the opposite sides of the first legs on the same plane. The lower ends of the two first legs are connected by a first ground beam. The opposite sides of the two first legs, the top surface of the first ground beam, and the inverted V-shaped notch form a triangular structure. A traveling trolley is located on the lower side of the first ground beam. The flexible legs include two symmetrically arranged second legs, each with a corresponding wedge-shaped notch at its top. The two wedge-shaped notches are joined together. The lower ends of the two second legs are connected by a second ground beam. The opposite sides of the two second legs and the top surface of the second ground beam form a triangular structure. A second support seat is located at the upper end of the two second legs. The main beam is located above and connects the first and second support seats.

[0008] Mounting frames are installed on the lower middle sections of the first and second ground beams, respectively. One side of the mounting frame is used to install rail clamps and hydraulic pump stations, and the other side of the mounting frame is used to install anchoring devices.

[0009] The mounting bracket is a Y-shaped bracket, and the lower side of the rail clamp is equipped with traveling wheels corresponding to the ground rail.

[0010] A cable reel is installed at the front end of the first ground beam; seven sets of traveling trolleys are installed on the lower sides of both ends of the first ground beam; and six sets of traveling trolleys are installed on the lower sides of both ends of the second ground beam.

[0011] From bottom to top, a primary balance beam, a secondary balance beam, and a tertiary balance beam are respectively installed between the first ground beam, the second ground beam, and the traveling trolley; the lower ends of the first and second ground beams are respectively hinged to the tertiary balance beams, and the lower ends of each tertiary balance beam are respectively hinged to the secondary balance beams; the lower ends of the secondary balance beams are respectively hinged to the primary balance beams or the traveling trolleys, and the lower ends of the primary balance beams are respectively hinged to a set of traveling trolleys.

[0012] The secondary balance beams below the first ground beam include a straight balance beam and an L-shaped balance beam. The secondary balance beams below the first ground beam are L-shaped balance beams. The lower sides of both ends of the straight balance beam are respectively hinged to the primary balance beam. The lower sides of both ends of the primary balance beam are respectively hinged to a set of traveling trolleys. The L-shaped balance beam includes a horizontal part and an inclined part. The horizontal part is hinged to the primary balance beam, and the inclined part is hinged to a set of traveling trolleys.

[0013] The rigid support leg is equipped with a first ladder, which extends upward in a zigzag pattern between the two first supports. The flexible support leg is equipped with a second ladder, which extends between the two second supports to one of the second supports and extends upward along the side of the second support.

[0014] Compared to existing technologies, the advantages of this invention are that it provides a more stable outrigger structure for large-tonnage gantry cranes, with stronger load-bearing capacity and less susceptibility to deformation, making it suitable for use in large-tonnage gantry cranes. Specifically, both the flexible and rigid outriggers form a triangular support structure, which, compared to the conventional trapezoidal structure, effectively prevents deformation and increases load-bearing capacity. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a side view of the rigid support leg of this utility model.

[0017] Figure 3 This is a side view of the flexible support leg of this utility model.

[0018] Figure 4 This is a partially enlarged structural diagram of the upper part of the first leg in this utility model.

[0019] Figure 5 This is a partially enlarged structural diagram of the lower end of the first leg in this utility model.

[0020] Figure 6 This is a partially enlarged structural diagram of the upper end of the second leg in this utility model.

[0021] In the diagram: 1. Rigid support leg; 2. Flexible support leg; 3. Main beam; 4. First support leg; 5. First support seat; 6. Inverted V-shaped notch; 7. First ground beam; 8. Second support leg; 9. Second ground beam; 10. First escalator; 11. Second escalator; 12. Cable reel; 13. First-level balance beam; 14. Straight-line balance beam; 15. L-shaped balance beam; 16. Third-level balance beam; 17. Traveling trolley; 18. Mounting frame; 19. Anchoring device; 20. Rail clamp; 21. Second support seat. Detailed Implementation

[0022] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. "Installed," "equipped with," and "connected" can employ conventional means in the prior art, such as integral installation, snap-fit ​​installation, welding connection, adhesive connection, bolted connection, etc. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances and select suitable connection, setting, or installation methods from the existing technology.

[0024] like Figure 1-6 As shown, a leg structure for a large-tonnage gantry crane includes a rigid leg 1, a flexible leg 2, and a main beam 3 connecting the rigid leg 1 and the flexible leg 2. The rigid leg 1 includes two symmetrically arranged first legs 4. A first support seat 5 is provided at the upper end of each first leg 4. An inverted V-shaped notch 6 is provided in the lower center of the first support seat 5. The inclined sides of the inverted V-shaped notch 6 are on the same plane as the sides opposite to the first leg 4. The lower ends of the two first legs 4 are connected by a first ground beam 7. The opposite sides of the two first legs 4, the top surface of the first ground beam 7, and the inverted V-shaped notch 6 form a triangular structure. The V-shaped tip of the inverted V-shaped notch transitions through an arc. The first ground beam... A traveling trolley 17 is provided on the lower side; the flexible support leg 2 includes two symmetrically arranged second support legs 8, the top of the two second support legs 8 are respectively provided with wedge-shaped notches, the two wedge-shaped notches are connected, the lower ends of the two second support legs 8 are connected by a second ground beam 9, and a traveling trolley is also provided on the lower side of the second ground beam. Specifically, the traveling trolley adopts existing technology and mainly includes a frame, wheels, drive motor, etc.; the opposite sides of the two second support legs 8 and the top surface of the second ground beam 9 form a triangular structure, and a second support seat 21 is provided on the upper end of the two second support legs 8. The main beam 3 is located on the upper side of the first support seat 5 and the second support seat 21 and connects the first support seat 5 and the second support seat 21.

[0025] The outrigger structure of this large-tonnage gantry crane is more stable, has a stronger load-bearing capacity, and is less prone to deformation, making it suitable for use in large-tonnage gantry cranes. Specifically, both the flexible and rigid outriggers form a triangular support structure, which, compared to the conventional trapezoidal structure, avoids excessive stress concentration that could lead to deformation and effectively increases the load-bearing capacity.

[0026] In one embodiment, mounting frames 18 are respectively provided on the lower middle sections of the first ground beam 7 and the second ground beam. One side of the mounting frame 18 is used to install the rail clamp 20 and the hydraulic pump station, and the other side of the mounting frame 18 is used to install the anchoring device 19. Specifically, the rail clamp is a commercially available conventional hydraulic rail clamp, and the hydraulic pump station drives the rail clamp to work; the anchoring device is also a commercially available conventional anchoring device.

[0027] In one embodiment, the mounting bracket 18 is a Y-shaped bracket, and the lower side of the rail clamp 20 is provided with a traveling wheel corresponding to the ground rail, so as to facilitate movement along the ground rail together with the traveling trolley.

[0028] In one embodiment, a cable reel 12 is provided at the front end of the first ground beam 7; seven sets of traveling trolleys 17 are provided on the lower sides of both ends of the first ground beam 7 to facilitate the use of rigid outriggers; and six sets of traveling trolleys 17 are provided on the lower sides of both ends of the second ground beam 9 to facilitate the use of flexible outriggers.

[0029] In one embodiment, a primary balance beam 13, a secondary balance beam, and a tertiary balance beam 16 are respectively arranged from bottom to top between the first ground beam 7, the second ground beam, and the traveling trolley 17; the lower ends of the first ground beam 7 and the second ground beam are respectively hinged to the tertiary balance beam 16, and the lower ends of each tertiary balance beam 16 are respectively hinged to the secondary balance beam; the lower ends of the secondary balance beam are hinged to the primary balance beam 13 or the traveling trolley 17, and the lower ends of the primary balance beam 13 are respectively hinged to a set of traveling trolleys 17. The stability of the structure is fully improved by connecting the balance beams and the traveling trolleys.

[0030] In one embodiment, the secondary balance beam below the first ground beam includes a straight balance beam 14 and an L-shaped balance beam 15. The secondary balance beam below the first ground beam is an L-shaped balance beam 15. Referring to the attached figure, the two L-shaped balance beams 15 are symmetrically arranged, with the inclined portion facing the middle of the secondary balance beam. The lower sides of both ends of the straight balance beam 14 are respectively hinged to the primary balance beam 13, and the lower sides of both ends of the primary balance beam 13 are respectively hinged to a set of traveling trolleys 17. The L-shaped balance beam 15 includes a horizontal portion and an inclined portion. The horizontal portion is hinged to the primary balance beam 13, and the inclined portion is hinged to a set of traveling trolleys 17.

[0031] In one embodiment, the rigid support leg 1 is provided with a first ladder 10, which extends upward in a zigzag pattern between the two first supports 4. The flexible support leg 2 is provided with a second ladder 12, which extends between the two second supports 8 to one of the second supports 8 and extends upward along the side of the second support 8. The first ladder and the second ladder facilitate workers to climb and maintain the equipment.

[0032] The above embodiments can be combined with each other.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A leg structure of a large-tonnage gantry crane, comprising a rigid leg, a flexible leg, and a girder connecting the rigid leg and the flexible leg; characterized in that: The rigid outrigger includes two symmetrically arranged first outriggers. Each first outrigger has a first support seat at its upper end. An inverted V-shaped notch is located in the lower center of the first support seat. The inclined sides of the inverted V-shaped notch are on the same plane as the opposite sides of the first outrigger. The lower ends of the two first outriggers are connected by a first ground beam. The opposite sides of the two first outriggers, the top surface of the first ground beam, and the inverted V-shaped notch form a triangular structure. A traveling trolley is located on the lower side of the first ground beam. The flexible outrigger includes two symmetrically arranged second outriggers. Each second outrigger has a corresponding wedge-shaped notch at its top, which is joined together. The lower ends of the two second outriggers are connected by a second ground beam. The opposite sides of the two second outriggers and the top surface of the second ground beam form a triangular structure. A second support seat is located at the upper end of each second outrigger. A main beam is located above and connects the first and second support seats.

2. The leg structure of a large-tonnage gantry crane according to claim 1, characterized in that: Mounting frames are installed on the lower middle sections of the first and second ground beams, respectively. One side of the mounting frame is used to install rail clamps and hydraulic pump stations, and the other side of the mounting frame is used to install anchoring devices.

3. The outrigger structure of the large-tonnage gantry crane according to claim 2, characterized in that: The mounting bracket is a Y-shaped bracket, and the lower side of the rail clamp is equipped with traveling wheels corresponding to the ground rail.

4. The leg structure of a large-tonnage gantry crane according to any one of claims 1-3, characterized in that: A cable reel is installed at the front end of the first ground beam; seven sets of traveling trolleys are installed on the lower sides of both ends of the first ground beam; and six sets of traveling trolleys are installed on the lower sides of both ends of the second ground beam.

5. The leg structure of a large-tonnage gantry crane according to claim 4, characterized in that: From bottom to top, a primary balance beam, a secondary balance beam, and a tertiary balance beam are respectively installed between the first ground beam, the second ground beam, and the traveling trolley; the lower ends of the first and second ground beams are respectively hinged to the tertiary balance beams, and the lower ends of each tertiary balance beam are respectively hinged to the secondary balance beams; the lower ends of the secondary balance beams are respectively hinged to the primary balance beams or the traveling trolleys, and the lower ends of the primary balance beams are respectively hinged to a set of traveling trolleys.

6. The leg structure of a large-tonnage gantry crane according to claim 5, characterized in that: The secondary balance beams below the first ground beam include a straight balance beam and an L-shaped balance beam. The secondary balance beams below the first ground beam are L-shaped balance beams. The lower sides of both ends of the straight balance beam are respectively hinged to the primary balance beam. The lower sides of both ends of the primary balance beam are respectively hinged to a set of traveling trolleys. The L-shaped balance beam includes a horizontal part and an inclined part. The horizontal part is hinged to the primary balance beam, and the inclined part is hinged to a set of traveling trolleys.

7. The leg structure of a large-tonnage gantry crane according to claim 6, characterized in that: The rigid support leg is equipped with a first ladder, which extends upward in a zigzag pattern between the two first supports. The flexible support leg is equipped with a second ladder, which extends between the two second supports to one of the second supports and extends upward along the side of the second support.

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