Portal crane with anti-overturning structure

Abstract

The utility model discloses a portal crane with an anti-overturning structure, which belongs to the field of engineering machinery and comprises supporting beams arranged on the left side and the right side, lifting beams extending out of the tops of the supporting beams are movably arranged in the supporting beams, a single-arm cross beam is arranged between the tops of the two lifting beams, and a vertically downward limiting groove is formed in one side of the top of each supporting beam. Rope penetrating holes are symmetrically formed in the two side walls, perpendicular to the limiting grooves, of the supporting beam, first mounting plates are symmetrically arranged at the bottom of the lifting beam, lifting wheels rotationally connected are arranged between the two first mounting plates, a cable machine for winding a steel cable is arranged on one side of the supporting beam, and a matching wheel is arranged on the face, opposite to the cable machine, of the supporting beam. A steel cable on the cable machine sequentially penetrates through the rope penetrating hole, bypasses the lifting wheel and the matching wheel and is fixed to the supporting beam. The situation that the portal crane overturns in a strong wind environment is effectively prevented, and the stability of the portal crane is improved.

Description

Technical Field

[0001] The utility model relates to the field of engineering machinery, in particular to a gantry crane with an anti-overturning structure. Background Art

[0002] Gantry crane is a variation of bridge crane. Its shape is like a door-shaped frame. Support legs are installed under the load-bearing main beam of gantry crane, which can run directly on the ground track. Its main features are high site utilization, wide operating range, wide adaptability and strong versatility. Therefore, it is widely used in port cargo yards, warehousing and logistics, large-scale construction projects, mining and power industry and other scenarios.

[0003] Existing gantry cranes are generally quite tall. In windy weather, the cranes are subject to the lateral wind force and may be blown down by the strong wind without certain protective measures. Utility Model Content

[0004] The utility model aims to provide a gantry crane with an anti-overturning structure, which effectively solves the problem that the existing gantry crane may overturn due to the effect of lateral wind force when encountering strong winds.

[0005] The technical solution of the utility model is as follows:

[0006] A gantry crane with an anti-overturning structure comprises support beams arranged on left and right sides, a lifting beam extending from the top of the support beam is movably arranged inside the support beam, a single-arm crossbeam is arranged between the tops of the two lifting beams, a vertical downward limiting groove is arranged on one side of the top of the support beam, and rope threading holes are symmetrically opened on two side walls of the support beam that are perpendicular to the limiting groove;

[0007] The bottom of the lifting beam is symmetrically provided with mounting plates 1, and a lifting wheel connected in rotation is provided between the two mounting plates 1. A cable machine for winding a steel cable is provided on one side of the support beam, and a matching wheel is provided on the opposite side of the support beam and the cable machine. The steel cable on the cable machine passes through the rope threading hole in sequence, bypasses the lifting wheel and the matching wheel, and is fixed on the support beam.

[0008] The lifting beam is provided with a penetrating positioning hole, and the supporting beam is provided with a positioning component, and the positioning component fixes the lifting beam and the supporting beam.

[0009] Furthermore, the cross-section of the support beam is rectangular, and weight-increasing plates are provided on two opposite side walls of the support beam. The weight-increasing plates are on opposite side walls perpendicular to the rope threading holes, and the vertical section of the weight-increasing plates is a right triangle, and the base of the triangle becomes larger as it goes down.

[0010] Furthermore, a placement plate is provided on the side wall of the support beam which is perpendicular to the weight-increasing plate. The placement plate is located at the bottom of the side wall of the support material, and multiple layers of height-increasing rings are provided on the placement plate.

[0011] Furthermore, the lifting wheels and the matching wheels are arranged in two groups, a second mounting plate is arranged on one side of the support beam, and the matching wheels are movably arranged on the second mounting plate.

[0012] Furthermore, the positioning assembly includes a cylinder and a positioning block. A mounting plate three is provided on one side of the support beam near the top. The cylinder is installed on the top of the mounting plate three. The telescopic rod of the cylinder is connected to the positioning block. The bottom surface of the positioning block is movably fitted on the top surface of the support beam. When the support beam is fixed to the lifting beam, the positioning block is inserted into the positioning hole.

[0013] Furthermore, the length of the positioning block is greater than the length of the positioning hole.

[0014] The advantages of the utility model are:

[0015] 1. The utility model arranges a movable lifting beam on the supporting beam. When the cylinder positioning plug is disengaged from the positioning hole, the cable machine lengthens the steel cable, one end of the steel cable on the opposite side of the cable machine is fixed, and the lifting wheel moves on the steel cable to move the lifting beam downward on the supporting beam, thereby reducing the height of the single-arm crossbeam and the height of the entire crane. In a windy environment, the overall height can be lowered to reduce the contact area with the wind, thereby reducing the possibility of the gantry crane being blown down and overturned.

[0016] 2. The utility model sets a positioning component, which drives the steel cable to retract from the cable machine to raise the lifting beam. When the positioning hole on the lifting beam is aligned with the positioning plug, the cylinder pushes the positioning plug to be inserted into the positioning hole, thereby achieving fixation between the lifting beam and the support beam, so that the crane can perform normal lifting after the height does not need to be raised or lowered.

[0017] 3. The utility model arranges a placement plate on the side wall of the support beam. The lower the placement plate is, the larger the bottom area is. After the placement plate is connected to the support beam, the overall contact area with the ground is increased, thereby increasing the wind resistance stability of the support beam.

[0018] 4. The utility model provides a placement plate on the support beam, and the placement plate has different layers of weight-increasing rings. When encountering different levels of wind force, different layers of weight-increasing rings can be installed to increase the overall bottom weight of the support beam, thereby improving the wind resistance of the support beam when encountering strong wind force and avoiding overturning. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a front view of the overall structure of the utility model;

[0020] Figure 2 It is a side view of the overall structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the upper component of the support column of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the upper component of the lifting column of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the positioning component of the utility model.

[0024] Figure numerals: 1. Support beam; 2. Lifting beam; 3. Single-arm crossbeam; 4. Limiting groove; 5. Rope threading hole; 6. Mounting plate one; 7. Lifting wheel; 8. Steel cable; 9. Cable machine; 10. Matching wheel; 11. Positioning hole; 12. Weight-increasing plate; 13. Placement plate; 14. Weight-increasing ring; 15. Mounting plate two; 16. Cylinder; 17. Positioning plug; 18. Mounting plate three. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] like Figures 1 to 5 As shown, the utility model provides a gantry crane with an anti-overturning structure, which includes support beams 1 arranged on left and right sides, a lifting beam 2 extending from the top of the support beam 1 is movably provided inside the support beam 1, and a single-arm cross beam 3 is provided between the tops of the two lifting beams 2. By movably setting the lifting beam 2 inside the support beam 1, the height of the lifting beam 2 can be lowered in windy weather, thereby lowering the height of the entire crane, thereby reducing the possibility of the gantry crane being blown over and overturned.

[0027] A vertical downward limit groove 4 is provided on one side of the top of the support beam 1. The limit groove 4 enables the inclined portion connected to the single arm to drop into the limit groove 4 when the lifting beam 2 is descending. On the one hand, it enables the lifting beam 2 to be lowered, and ensures that the position of the lifting beam 2 in other directions will not change during the height change process.

[0028] The two side walls of the support beam 1 that are perpendicular to the limit groove 4 are symmetrically provided with rope threading holes 5. The rope threading holes 5 are provided so that when the cable machine 9 is retracting and releasing the steel cable 8, the steel cable 8 enters the support beam 1 from the rope threading holes 5 and then passes out;

[0029] A mounting plate 6 is symmetrically provided at the bottom of the lifting beam 2, and a rotatably connected lifting wheel 7 is provided between the two mounting plates 6. A steel cable 8 passes around the bottom of the wheel wall of the lifting wheel 7, and the steel cable 8 lifts the lifting wheel 7. Through the cooperation of the steel cable 8, the height of the lifting wheel 7 can be increased, thereby increasing the height of the lifting beam 2.

[0030] A cable machine 9 for winding a steel cable 8 is provided on one side of the support beam 1. The cable machine 9 is connected to an external power supply. A matching wheel 10 is provided on the opposite side of the support beam 1 and the cable machine 9. The steel cable 8 on the cable machine 9 passes through the rope threading hole 5 in sequence, bypasses the lifting wheel 7 and the matching wheel 10, and is fixed on the support beam 1. The cable machine 9, the lifting wheel 7 and the matching wheel 10 are distributed in a triangle in the vertical section.

[0031] A through positioning hole 11 is provided on the lifting beam 2, and a positioning assembly is provided on the supporting beam 1. The positioning assembly fixes the lifting beam 2 and the supporting beam 1. The positioning assembly includes a cylinder 16 and a positioning plug 17. A mounting plate three 18 is provided on the side of the supporting beam 1 close to the top. The cylinder 16 is installed on the top of the mounting plate three 18. The telescopic rod of the cylinder 16 is connected to the positioning plug 17. The bottom surface of the positioning plug 17 is movably fitted on the top surface of the supporting beam 1. When the supporting beam 1 and the lifting beam 2 are fixed, the positioning plug 17 is inserted into the positioning hole 11, thereby realizing the fixation between the lifting beam 2 and the supporting beam 1, so that the crane can perform normal lifting after the height does not need to be lifted or lowered.

[0032] The cross-section of the support beam 1 is rectangular, and weight-increasing plates 12 are provided on two opposite side walls of the support beam 1. The weight-increasing plates 12 are on opposite side walls perpendicular to the rope threading hole 5. The vertical cross-section of the weight-increasing plates 12 is a right triangle, and the base of the triangle becomes larger as it goes downwards, thereby increasing the overall contact area with the ground and increasing the wind resistance stability of the support beam 1.

[0033] A placing plate 13 is provided on the side wall of the support beam 1 which is perpendicular to the weight-increasing plate 12. The placing plate 13 is located at the bottom of the side wall of the support material. A plurality of layers of weight-increasing rings 14 are provided on the placing plate 13. When encountering wind forces of different levels, weight-increasing rings 14 of different layers are installed to increase the overall bottom weight of the support beam 1, thereby improving the wind resistance of the support beam 1 when encountering strong wind forces and avoiding overturning.

[0034] The lifting wheels 7 and the matching wheels 10 are arranged in two groups, a mounting plate 15 is arranged on one side of the support beam 1, and the matching wheels 10 are movably arranged on the mounting plate 15. By setting the lifting wheels 7 and the matching wheels 10 in two groups, two steel cables 8 are arranged on the cable machine 9 respectively, thereby improving the overall stability of the lifting beam 2 during the lifting process.

[0035] The length of the positioning block 17 is greater than the length of the positioning hole 11 , so that the lower surface of the positioning block 17 falls on the upper surface of the support column, thereby achieving fixation between the support beam 1 and the lifting beam 2 .

[0036] Detailed usage and effects of the above embodiments:

[0037] In the initial state, the cable machine 9, the lifting wheel 7 and the cooperation are distributed in a triangular shape in the vertical section, the steel cable 8 lifts the lifting wheel 7, the positioning block 17 is inserted into the positioning hole 11, and the lower surface of the positioning block 17 is in contact with the upper surface of the support column. The gantry crane works normally. When encountering strong winds, the cable machine 9 works to make the steel cable 8 shrink slightly, driving the lifting beam 2 to rise a short distance on the support beam 1. The height of the positioning hole 11 is greater than the height of the positioning block 17, which will make the positioning block 17 no longer subjected to force. At this time, the cylinder 16 is started, and the telescopic rod of the cylinder 16 drives the positioning block 17 to disengage from the positioning hole 11.

[0038] At this time, the gravity of the lifting beam 2 will fall on the lifting wheel 7, and the cable machine 9 will lengthen the steel cable 8. When the steel cable 8 is slowly lengthened, because the other end of the steel cable 8 is fixed on the supporting beam 1, under the action of the gravity of the lifting beam 2, the lifting beam 2 will slowly move downward inside the supporting beam 1, thereby lowering the height of the lifting beam 2, reducing the height of the entire gantry crane and reducing the possibility of the gantry crane being blown down by strong winds.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gantry crane with an anti-overturning structure, characterized in that: It comprises support beams (1) arranged on the left and right sides, a lifting beam (2) extending from the top of the support beam (1) being movably arranged inside the support beam (1), a single-arm cross beam (3) being arranged between the tops of the two lifting beams (2), a vertically downward limiting groove (4) being arranged on one side of the top of the support beam (1), and rope threading holes (5) being symmetrically arranged on two side walls of the support beam (1) which are perpendicular to the limiting groove (4); The bottom of the lifting beam (2) is symmetrically provided with mounting plates (6), a lifting wheel (7) rotatably connected is provided between the two mounting plates (6), a cable machine (9) for winding a steel cable (8) is provided on one side of the support beam (1), a matching wheel (10) is provided on the opposite side of the support beam (1) and the cable machine (9), and the steel cable (8) on the cable machine (9) passes through the rope threading hole (5) in sequence, bypasses the lifting wheel (7) and the matching wheel (10), and is fixed on the support beam (1); The lifting beam (2) is provided with a penetrating positioning hole (11), and the supporting beam (1) is provided with a positioning component, which fixes the lifting beam (2) and the supporting beam (1).

2. The gantry crane with an anti-overturning structure according to claim 1, characterized in that: The cross section of the support beam (1) is rectangular. Weight-increasing plates (12) are provided on two opposite side walls of the support beam (1). The weight-increasing plates (12) are on opposite side walls perpendicular to the rope threading hole (5). The vertical cross section of the weight-increasing plates (12) is a right triangle, and the base of the triangle becomes larger as it goes downwards.

3. The gantry crane with an anti-overturning structure according to claim 2, characterized in that: A placement plate (13) is provided on a side wall of the support beam (1) which is perpendicular to the weight-increasing plate (12); the placement plate (13) is located at the bottom of the side wall of the support beam; and multiple layers of height-increasing rings (14) are provided on the placement plate (13).

4. The gantry crane with an anti-overturning structure according to claim 1, characterized in that: The lifting wheels (7) and the matching wheels (10) are arranged in two groups, and a second mounting plate (15) is arranged on one side of the support beam (1), and the matching wheels (10) are movably arranged on the second mounting plate (15).

5. The gantry crane with an anti-overturning structure according to claim 1, characterized in that: The positioning assembly comprises a cylinder (16) and a positioning plug (17); a mounting plate three (18) is provided on one side of the support beam (1) close to the top; the cylinder (16) is mounted on the top of the mounting plate three (18); a telescopic rod of the cylinder (16) is connected to the positioning plug (17); the bottom surface of the positioning plug (17) is movably attached to the top surface of the support beam (1); when the support beam (1) and the lifting beam (2) are fixed, the positioning plug (17) is inserted into the positioning hole (11).

6. The gantry crane with an anti-overturning structure according to claim 5, characterized in that: The length of the positioning plug (17) is greater than the length of the positioning hole (11).

Images