Flexible support leg for a double-girder portal crane

Abstract

The utility model relates to the technical field of hoisting machinery, especially discloses a flexible supporting leg of double-beam portal crane, which comprises two supporting leg bodies, the two supporting leg bodies are connected through a cross pull rod, the lower end of the supporting leg body is provided with at least one detachable standard section, the lower end of the lowermost standard section is provided with a telescopic support, the telescopic support is provided with a safety lock pin, and the lower end of the telescopic support is provided with a supporting plate. The utility model sets different numbers of standard sections on the supporting leg body, cooperates with the hydraulic oil cylinder to drive the inner sleeve to be telescopic in the outer sleeve, can realize the adjustment of height, satisfies the supporting needs of different height operation surfaces, has wide application range, realizes the positioning of the inner sleeve relative to the outer sleeve through the safety lock pin, guarantees the stable and reliable connection between the inner sleeve and the outer sleeve, guarantees the safety in use, has simple overall structure, and the standard section has high universality and low production cost.

Description

Technical Field

[0001] This utility model relates to the field of lifting machinery technology, and in particular to a flexible support leg for a double-beam gantry crane. Background Technology

[0002] Gantry cranes are mainly used in construction sites, factory workshops, shipyards and docks for lifting and horizontal movement of heavy objects. In actual operation, due to the large span of gantry cranes, it is impossible to ensure that the two sides travel synchronously when moving. This causes the main beam of the gantry crane to bear lateral torque, which can easily lead to damage to the steel structure of the main beam. Therefore, the outriggers of gantry cranes often adopt a rigid-flexible structure to reduce the lateral thrust on the rail when the main beam is under load, thereby reducing the chance of rail biting.

[0003] Chinese utility model patent (application number 201822230221.4) discloses a flexible outrigger for a crane, including an upper chord, a lower chord, a vertical support, a first web member, and a second web member; one end of the upper chord and one end of the lower chord intersect at a bottom support; multiple first web members and second web members are installed between the upper chord and the lower chord; this technical solution can solve the problem of wheel wear on the rail caused by asynchronous operation of the gantry crane trolley, but the flexible outrigger of this technical solution adopts an integral structure with fixed dimensions, which limits its applicability. Different specifications of flexible outriggers need to be manufactured for different working scenarios, which increases production costs.

[0004] Therefore, it is necessary to propose an improvement to the flexible outriggers of a double-girder gantry crane to overcome the shortcomings of the existing technology. Utility Model Content

[0005] The purpose of this invention is to solve the problems in the prior art and provide a flexible support leg for a double-beam gantry crane.

[0006] The technical solution of this utility model is:

[0007] A flexible outrigger for a double-girder gantry crane includes two outrigger bodies connected by a tie rod. At least one detachable standard section is provided at the lower end of the outrigger body. A telescopic support is provided at the lower end of the lowest standard section. A safety locking pin is provided on the telescopic support. A support plate is provided at the lower end of the telescopic support.

[0008] Preferably, the telescopic support includes an outer sleeve, a hydraulic cylinder, and an inner sleeve. The inner sleeve is located inside the outer sleeve and slides with it. The hydraulic cylinder is located inside the outer sleeve and is connected between the outer sleeve and the inner sleeve. The outer sleeve has a first locking hole, and the inner sleeve has multiple axially evenly distributed second locking holes.

[0009] Preferably, the safety locking pin includes a bracket, a tightening screw, a fixing block, and two insertion pins. The bracket is mounted on the outer sleeve, and symmetrically distributed mounting seats are provided at both ends of the bracket. The tightening screw is threaded into the mounting seat, and two insertion pins are inserted into the fixing block. The two insertion pins are symmetrically distributed, and the lower end of the tightening screw abuts against the fixing block.

[0010] Preferably, a support rod is provided between the two outer sleeves, and a hydraulic station is provided on the support rod, with the hydraulic cylinder connected to the hydraulic station.

[0011] Preferably, a diagonal tie rod is provided between the horizontal tie rod and the outrigger body, and a reinforcing rod is provided between the two diagonal tie rods.

[0012] Preferably, the end of the inner sleeve facing away from the outer sleeve is provided with a ball head that is connected to the support plate.

[0013] Preferably, both ends of the standard section are provided with connecting flanges, and evenly distributed reinforcing ribs are provided between the connecting flanges and the standard section.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This utility model achieves height adjustment by setting different numbers of standard sections on the outrigger body, and using hydraulic cylinders to drive the inner sleeve to extend and retract within the outer sleeve, thus meeting the support needs of working surfaces at different heights. It has a wide range of applications. The safety locking pins ensure the positioning of the inner sleeve relative to the outer sleeve, guaranteeing a stable and reliable connection between the inner and outer sleeves and ensuring safe use. The overall structure is simple, and assembly and maintenance are convenient and quick. The standard sections are highly versatile and have low production costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the left-side structure of this utility model;

[0018] Figure 3 This utility model Figure 1 A magnified schematic diagram of the structure at point A;

[0019] Figure 4 This utility model Figure 1 A magnified schematic diagram of the structure at point B;

[0020] Figure 5 This is a schematic diagram of the telescopic support and safety locking pin structure of this utility model.

[0021] The components include: 1. Outrigger body; 2. Tie rod; 3. Standard section; 31. Connecting flange; 32. Reinforcing rib plate; 4. Telescopic support; 41. Outer sleeve; 42. Hydraulic cylinder; 43. Inner sleeve; 44. First locking hole; 45. Second locking hole; 46. Ball head; 47. Support plate; 5. Safety locking pin; 51. Bracket; 52. Tightening screw; 53. Fixing block; 54. Insert pin; 55. Mounting base; 6. Support rod; 7. Hydraulic station; 8. Diagonal tie rod; 9. Reinforcing rod. Detailed Implementation

[0022] To make the technical means, technical features, utility model purpose and technical effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations.

[0023] like Figures 1-5 As shown, a flexible outrigger of a double-girder gantry crane includes an outrigger body 1, a standard section 3, a telescopic support 4, and a safety locking pin 5. At least one standard section 3 and a telescopic support 4 are sequentially installed at the lower end of the outrigger body 1, and the safety locking pin 5 is installed on the telescopic support 4 for locking after the telescopic support 4 is extended or retracted.

[0024] like Figure 1 and Figure 2 As shown, there are two outrigger bodies 1, which are connected as one unit by a horizontal tie rod 2. The horizontal tie rod 2 is bolted to the outrigger body 1, which is a firm connection and easy to assemble and disassemble. To further enhance the stability of the connection between the horizontal tie rod 2 and the outrigger body 1, a diagonal tie rod 8 is connected between the horizontal tie rod 2 and the two outrigger bodies 1. One end of the diagonal tie rod 8 is fixedly connected to the horizontal tie rod 2, and the other end of the diagonal tie rod 8 is bolted to the outrigger body 1, which allows for detachable installation. A reinforcing rod 9 is connected between the two diagonal tie rods 8. The horizontal tie rod 2, the diagonal tie rod 8 and the reinforcing rod 9 are welded as one unit, resulting in high overall structural strength and good stability in use.

[0025] like Figure 1 , Figure 2 and Figure 4 As shown, the number of standard sections 3 is determined according to actual working needs. When in use, multiple standard sections 3 of a certain length are connected in sequence and installed at the lower end of the outrigger body 1. To facilitate the installation of standard sections 3, connecting flanges 31 are integrally installed at both ends of standard sections 3. To enhance the connection strength between connecting flanges 31 and standard sections 3, multiple reinforcing ribs 32 are welded between standard sections 3 and connecting flanges 31. The multiple reinforcing ribs 32 are evenly distributed.

[0026] like Figure 1 , Figure 2 and Figure 5As shown, the telescopic support 4 is installed at the lower end of the lowest standard section 3. The telescopic support 4 includes an outer sleeve 41, a hydraulic cylinder 42, and an inner sleeve 43. The outer sleeve 41 is detachably connected to the standard section 3 by flange bolts. The inner sleeve 43 is installed inside the outer sleeve 41, and the inner sleeve 43 and the outer sleeve 41 are slidably fitted together. The hydraulic cylinder 42 is installed inside the outer sleeve 41 and is connected between the outer sleeve 41 and the inner sleeve 43. The extension and retraction of the hydraulic cylinder 42 drives the inner sleeve 43 to slide inside the outer sleeve 41. A first locking hole 44 is machined through the side wall of the outer sleeve 41. There are two first locking holes 44 arranged side by side. A second locking hole 45 is machined on the side wall of the inner sleeve 43. There are multiple sets of second locking holes 45. The number of second locking holes 45 in each set is also two side by side. The multiple sets of second locking holes 45 are evenly distributed along the axial direction of the inner sleeve 43.

[0027] A support rod 6 is connected between the two outer sleeves 41. A hydraulic station 7 is installed on the support rod 6. The hydraulic station 7 is connected to the hydraulic cylinder 42 through a pipeline. The hydraulic station 7 provides power for the extension and retraction of the hydraulic cylinder 42.

[0028] A ball head 46 is machined at the lower end of the inner sleeve 43 facing away from the outer sleeve 41. A support plate 47 is connected through the ball head 46, which enables the support plate 47 to be adjusted in all directions relative to the inner sleeve 43. It has good flexibility and adaptability and can be reliably and stably supported on the working surface.

[0029] like Figure 3 and Figure 5 As shown, the safety locking pin 5 includes a bracket 51, a tightening screw 52, ​​a fixing block 53, and a pin 54. The bracket 51 is welded to the outer sleeve 41. The bracket 51 is installed near the first locking hole 44. Mounting seats 55 are installed at both ends of the bracket 51. The mounting seats 55 are machined with internal threads. The tightening screw 52 is threaded into the mounting seats 55. There are two pins 54. The two pins 54 are inserted into the fixing block 53. After insertion, the two pins 54 are symmetrically distributed on the fixing block 53. After the fixing block 53 and the pins 54 are installed on the outer sleeve 41, the tightening screw 52 is rotated so that the lower end of the tightening screw 52 abuts against the fixing block 53, so that the pins 54 and the outer sleeve 41 exert force on each other, preventing the pins 54 from falling off during use and improving the safety of use.

[0030] The working principle of this utility model is as follows:

[0031] The two outrigger bodies 1 are connected by the horizontal tie rod 2. During installation, the ends of the horizontal tie rod 2 and the diagonal tie rod 8 are bolted to the outrigger body 1. According to the height data of the working surface, an appropriate number of standard sections 3 are installed at the lower end of the outrigger body 1, and the telescopic support 4 is installed at the end of the lowest standard section 3. In use, the hydraulic station 7 is started, and the hydraulic station 7 drives the hydraulic cylinder 42 to extend, pushing the inner sleeve 43 to slide out relative to the outer sleeve 41. When the inner sleeve 43 extends into place, a set of second locking holes 45 of the inner sleeve 43 engages with the outer sleeve 41. Corresponding to the first locking hole 44, insert the plug pin 54 into the first locking hole 44 and the second locking hole 45, and put the fixing block 53 on the plug pin 54. Tighten the tightening screw 52 so that the lower end of the tightening screw 52 is tightly abutted against the fixing block 53, and apply force to the fixing block 53 to generate pressure between the plug pin 54 and the inner sleeve 43 and the outer sleeve 41, so as to prevent the plug pin 54 from coming out during use, ensuring reliable connection and safe use. After assembly and adjustment, the whole assembly is installed on the double girder gantry crane to achieve auxiliary support.

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. All equivalent changes and modifications made in accordance with the scope of the claims of this utility model should fall within the technical scope of this utility model.

Claims

1. A flexible support leg for a double-girder gantry crane, characterized in that, It includes two outrigger bodies (1), which are connected by a horizontal tie rod (2). The lower end of the outrigger body (1) is provided with at least one detachable standard section (3), and the lower end of the lowest standard section (3) is provided with a telescopic support (4). The telescopic support (4) is provided with a safety locking pin (5), and the lower end of the telescopic support (4) is provided with a support plate (47).

2. The flexible outriggers of the double-girder gantry crane according to claim 1, characterized in that: The telescopic support (4) includes an outer sleeve (41), a hydraulic cylinder (42), and an inner sleeve (43). The inner sleeve (43) is located inside the outer sleeve (41) and slides with the outer sleeve (41). The hydraulic cylinder (42) is located inside the outer sleeve (41) and is connected between the outer sleeve (41) and the inner sleeve (43). The outer sleeve (41) is provided with a first locking hole (44), and the inner sleeve (43) is provided with a plurality of axially evenly distributed second locking holes (45).

3. The flexible outriggers of the double-girder gantry crane according to claim 2, characterized in that: The safety locking pin (5) includes a bracket (51), a tightening screw (52), a fixing block (53), and a plug pin (54). The bracket (51) is mounted on the outer sleeve (41). The bracket (51) has symmetrically distributed mounting seats (55) at both ends. The tightening screw (52) is threaded into the mounting seat (55). The two plug pins (54) are inserted into the fixing block (53). The two plug pins (54) are symmetrically distributed. The lower end of the tightening screw (52) abuts against the fixing block (53).

4. The flexible outriggers of the double-girder gantry crane according to claim 2, characterized in that: A support rod (6) is provided between the two outer sleeves (41), and a hydraulic station (7) is provided on the support rod (6). A hydraulic cylinder (42) is connected to the hydraulic station (7).

5. The flexible outriggers of the double-girder gantry crane according to claim 1, characterized in that: A diagonal brace (8) is provided between the horizontal tie rod (2) and the outrigger body (1), and a reinforcing rod (9) is provided between the two diagonal braces (8).

6. The flexible outriggers of the double-girder gantry crane according to claim 2, characterized in that: The inner sleeve (43) is provided with a ball head (46) connected to the support plate (47) at the end facing away from the outer sleeve (41).

7. The flexible outriggers of the double-girder gantry crane according to claim 1, characterized in that: Both ends of the standard section (3) are provided with connecting flanges (31), and uniformly distributed reinforcing ribs (32) are provided between the connecting flanges (31) and the standard section (3).

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