A gantry crane

Abstract

A gantry crane comprises a top beam, a column, a supporting column, a rotating sleeve, a first cross beam, a second cross beam, a flipping mechanism and two bottom plates, wherein the top beam is arranged horizontally, one end of the top beam is fixedly connected to one end of the rotating sleeve, and the other end of the top beam is detachably connected to one end of the column, an electric hoist is arranged between the rotating sleeve and the column, and the electric hoist is used to lift heavy objects, the end of the rotating sleeve away from the top beam is rotatably connected to one end of the supporting column, the rotating sleeve is used to drive the top beam to rotate along the rotating sleeve as the rotation center, the first cross beam and the second cross beam are both provided with a flipping mechanism, the flipping mechanism is used to rotate the two bottom plates respectively along the flipping mechanism as the center and place them horizontally side by side, and the two bottom plates are used to carry heavy objects when placed horizontally side by side, thereby solving the technical problems existing in the prior art, such as: the transportation is not stable enough and cannot be applied to a variety of scenes.

Description

Technical Field

[0001] The invention belongs to the field of cranes, and in particular relates to a gantry crane. Background Art

[0002] A gantry crane (also called a gantry crane) is a bridge crane with a bridge supported on a ground track by legs on both sides. It is structurally composed of a gantry, a trolley running mechanism, a lifting trolley and an electrical part. Some gantry cranes have legs only on one side, and the other side is supported on a factory building or a trestle, which is called a semi-gantry crane. The gantry crane is composed of the upper bridge frame (including the main beam and end beam), outriggers, lower crossbeam and other parts. A small gantry crane is a small and lightweight gantry crane that lifts heavy objects through an electric hoist. It is often used to lift some equipment or heavy objects in factories. Existing small gantry cranes are usually equipped with universal wheels at the bottom. After lifting the heavy objects, the heavy objects are directly suspended in the air and transported. During transportation, the heavy objects are prone to swing under the action of inertia, and the electric hoist has been lifting the suspended heavy objects, which has a certain impact on the durability of the electric hoist. In addition, for some scenes that are difficult for gantry cranes to pass through (such as placing equipment on an assembly line), other external force equipment is required for auxiliary lifting. It has the following technical problems: the transportation is not stable enough and it cannot be applied to a variety of scenes. Summary of the invention

[0003] The purpose of the present invention is to provide a gantry crane to solve the technical problems existing in the prior art, such as: insufficient stability in transportation and inability to be applicable to various scenarios.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is:

[0005] A gantry crane comprises a top beam, a column, a supporting column, a rotating sleeve, a first cross beam, a second cross beam, a flip mechanism and two bottom plates, wherein the top beam is an I-beam, the top beam is arranged horizontally, one end of the top beam is fixedly connected to one end of the rotating sleeve, the other end of the top beam is detachably connected to one end of the column, the rotating sleeve and the column are arranged vertically and side by side, an electric hoist is arranged between the rotating sleeve and the column, the electric hoist is arranged below the top beam and connected to the top beam, the electric hoist is used to lift heavy objects, and the end of the rotating sleeve away from the top beam is rotatable The rotating sleeve is used to drive the top beam to rotate along the rotating sleeve as the rotation center, and the other end of the support column is fixedly connected to the second cross beam. The rotating sleeve is concentrically arranged with the support column. The end of the column away from the top beam is fixedly connected to the first cross beam. The first cross beam and the column are in a "T" shape, and the second cross beam and the support column are in a "T" shape. The two "T" structures are parallel to each other. The first cross beam and the second cross beam are both provided with the flipping mechanism, and the flipping mechanism is used to respectively flip the two The bottom plate rotates along the flip mechanism as the center and is placed horizontally side by side. The two bottom plates are used to carry the heavy objects when placed horizontally side by side. The two bottom plates are detachably connected to the upright column and the support column respectively. There is a gap between the two bottom plates, and the gap is used for the electric hoist to raise or lower the heavy objects. The first crossbeam, the second crossbeam and the bottom of the two bottom plates are all fixedly connected with universal wheels, and the universal wheels are used to move the entire device. When it is necessary to lift the heavy objects, the hook of the electric hoist is hung on the heavy objects, and then the heavy objects are lifted, and the heavy objects pass through the gap between the two bottom plates. The bottom plate will not block the heavy object. After lifting the heavy object, if the heavy object needs to be moved, the relevant personnel can directly flip down the two bottom plates through the flipping mechanism. At this time, the two bottom plates are connected horizontally side by side, and then the heavy object can be placed on the two bottom plates through the electric hoist. Then, the whole device can be pushed by the universal wheel to achieve the purpose of moving the heavy object. By rotating the shaft sleeve and rotatably connecting it with the support column, the top beam, electric hoist and heavy object can be rotated to the target position together, which solves the scenario in which the door-type structure in the prior art is inconvenient to install or place, and achieves the beneficial effect of being applicable to a variety of scenarios.

[0006] Furthermore, the flipping mechanism includes a mounting seat, a rotating shaft and two connecting rods, the mounting seat is provided with a through hole, the rotating shaft can be rotatably inserted into the through hole, the two ends of the rotating shaft are respectively fixedly connected to one end of the two connecting rods, the other ends of the two connecting rods are fixedly connected to one of the base plates, the mounting seats in the flipping mechanism on different sides of the first beam and the second beam are respectively fixedly connected to the first beam and the second beam, and through the two connecting rods fixedly connected to the base plate, the rotating shaft rotates together with the base plate when the base plate is flipped, thereby achieving the purpose of rotating the base plate.

[0007] Furthermore, the support column and the rotating sleeve are both cylindrical structures, and a cavity with an opening is provided at the bottom of the rotating sleeve, and the opening is vertically arranged downward. One end of the support column is inserted into the cavity, and a bearing is provided at the end of the support column inserted into the cavity. The inner steel ring of the bearing is fixedly connected to the side of the support column, and the outer steel ring of the bearing is fixedly connected to the inner wall of the cavity of the rotating sleeve. The bearing is used to rotatably connect the support column and the rotating sleeve, and the functions of the above-mentioned rotating top beam, electric hoist and heavy object are realized by rotating the rotating sleeve on the bearing.

[0008] Furthermore, it includes a first mounting block, a second mounting block and a latch, the bottom of the first mounting block is fixedly connected to one end of the column close to the top beam, the top of the second mounting block is fixedly connected to one end of the top beam close to the column, the first mounting block and the second mounting block are abutted, the first mounting block and the second mounting block are both provided with a plurality of through holes of the same size, the through holes are arranged in a vertical direction, the latch can be slidably inserted into the through holes and penetrate the first mounting block and the second mounting block, when one end of the top beam leans against the column, the first mounting block and the second mounting block are in surface contact, the latch penetrates the two, and serves the purpose of preventing rotation, when the shaft sleeve needs to be rotated as mentioned above, the latch can be removed, and the operation is simple and convenient.

[0009] Furthermore, it also includes a fixed seat and two fixed rods, and any one side of the bottom plate away from the flip mechanism is fixedly connected to the two fixed seats, and the two fixed seats are arranged side by side. The column, the support column and the fixed seat are all provided with through holes adapted to the fixed rods. Any one of the fixed rods can be slidably inserted into the through holes of the column and the two fixed seats on the same side thereof, and the other fixed rod can be slidably inserted into the through holes of the support column and the two fixed seats on the same side thereof. The column and the support column are both arranged to be compatible with Between the two fixing seats on the same side, one end of the fixing rod is fixedly connected with a stopper, and the other end of the fixing rod is threadedly connected with a nut, and the stopper and the nut are both used to prevent the fixing rod from sliding out of the through hole. When the two base plates are against the columns and the support columns, one fixing rod penetrates the fixing seat and the column of the same base plate, and the other fixing rod penetrates the fixing seat and the support column of the other base plate, and stops and nuts are respectively provided at both ends of the fixing rod to prevent falling off. The fixing rod plays the role of fixing the base plate. When the base plate needs to be flipped, the nut can be removed to slide out the fixing rod.

[0010] Furthermore, the first crossbeam, the second crossbeam and the two bottom plates are each provided with two through holes adapted to the fixing rod, the through holes being concentrically arranged, and the through holes are used for the fixing rod to pass through the first crossbeam, the second crossbeam and the two bottom plates, and when the rotating shaft sleeve drives the top beam to rotate, the two fixing rods are respectively inserted into the two through holes, and in order to balance the entire device, the two fixing rods are inserted into the two through holes, at this time, the column, the support column and the two bottom plates form a whole through the fixing rod, and the fixing rod inserted into the through hole is equivalent to playing the role of a counterweight on the left side of the entire device, and at this time, the center of gravity of the entire device is balanced again, so in order to balance the center of gravity, the bottom plate and the column should be made of materials with higher density to play the role of a counterweight, in addition, the fixing rod plays the role of fixing the bottom plate when the bottom plate leans against the column and the support column, and the bottom plate is flipped to be horizontally side by side and then inserted into the above-mentioned through holes, which plays a multi-purpose role and prevents the fixing rod from being accidentally lost.

[0011] Furthermore, there are eight universal wheels, and the first cross beam, the second cross beam and the bottom of the two bottom plates are all fixedly connected with two universal wheels and are horizontally arranged side by side. When the two fixing rods are inserted into the first cross beam, the second cross beam and the two bottom plates, the eight universal wheels are on the same horizontal plane and are all in contact with the ground. In the above-mentioned process of moving heavy objects, in order to ensure the stability of movement, the fixing rods need to be inserted into the through holes of the first cross beam, the second cross beam and the two bottom plates. At this time, the eight universal wheels are evenly stressed at the bottom of the entire device, thereby ensuring the stability of movement.

[0012] Furthermore, it also includes a reinforcing rib, one end of which is fixedly connected to the top beam, and the other end of which is fixedly connected to the rotating sleeve. The reinforcing rib is an I-beam, and the reinforcing rib serves to stabilize the top beam.

[0013] The beneficial effects of the present invention are:

[0014] (1) The gantry crane is provided with two bottom plates. When the two bottom plates are flipped to be horizontal and side by side, heavy objects can be placed on them and transported, thereby achieving the beneficial effect of having a stable transportation function.

[0015] (2) The gantry crane is provided with a rotating shaft sleeve and a support column, which are rotatably connected to the support column. The top beam, electric hoist and heavy objects can be rotated to the target position together, achieving beneficial effects applicable to a variety of scenarios.

[0016] (3) The gantry crane is provided with two bottom plates, a rotating shaft sleeve and a support column. The two bottom plates play a role in stable transportation. The rotating shaft sleeve rotates on the support column and rotates the top beam, electric hoist and heavy objects to the target position together without the use of other external equipment, thereby achieving the beneficial effect of facilitating production and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a schematic diagram of the overall structure of a gantry crane.

[0018] Figure 2 This is a schematic diagram of a gantry crane of the present invention with two bottom plates placed horizontally side by side.

[0019] Figure 3 It is a schematic diagram of the rotating state of a rotating shaft sleeve of a gantry crane according to the present invention.

[0020] Figure 4 A schematic diagram of a flip front view of a gantry crane of the present invention

[0021] Figure 5 The present invention is a schematic cross-sectional view of a tipping mechanism of a gantry crane.

[0022] Figure 6 The present invention is a schematic diagram of the connection relationship between a rotating shaft sleeve and a supporting column of a gantry crane.

[0023] Figure 7 The present invention is a schematic diagram of the connection relationship of the fixing rods when the two bottom plates of the gantry crane are placed horizontally. DETAILED DESCRIPTION

[0024] Below in conjunction with the appended Figure 1-7, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] A gantry crane comprises a top beam 1, a column 2, a supporting column 4, a rotating sleeve 3, a first cross beam 6, a second cross beam 7, a flipping mechanism and two bottom plates 8, wherein the top beam 1 is an I-beam, the top beam 1 is arranged horizontally, one end of the top beam 1 is fixedly connected to one end of the rotating sleeve 3, and the other end of the top beam 1 is detachably connected to one end of the column 2, the rotating sleeve 3 and the column 2 are arranged vertically and side by side, an electric hoist 5 is arranged between the rotating sleeve 3 and the column 2, the electric hoist 5 is arranged below the top beam 1 and connected to the top beam 1, the electric hoist 5 is used to lift heavy objects, the end of the rotating sleeve 3 away from the top beam 1 is rotatably connected to one end of the supporting column 4, the rotating sleeve 3 is used to drive the top beam 1 to rotate along the rotating sleeve 3 as the rotation center, the other end of the supporting column 4 is fixedly connected to the second cross beam 7, the rotating sleeve 3 is connected to the The support column 4 is concentrically arranged, and one end of the column 2 away from the top beam 1 is fixedly connected to the first cross beam 6, the first cross beam 6 and the column 2 are in a "T"-shaped structure, the second cross beam 7 and the support column 4 are in a "T"-shaped structure, and the two "T"-shaped structures are parallel to each other. The first cross beam 6 and the second cross beam 7 are both provided with the flipping mechanism, and the flipping mechanism is used to rotate the two bottom plates 8 along the flipping mechanism as the center and place them horizontally side by side, and the two bottom plates 8 are used to carry the heavy objects when they are placed horizontally side by side, and the two bottom plates 8 are detachably connected to the column 2 and the support column 4, respectively, and there is a gap between the two bottom plates 8, and the gap is used for the electric hoist 5 to raise or lower the heavy objects, and the first cross beam 6, the second cross beam 7 and the bottom of the two bottom plates 8 are all fixedly connected with universal wheels 18, and the universal wheels 18 are used to move the entire device;

[0026] The top beam 1 is mounted on both sides of the column 2 and the rotating shaft sleeve 3 to form a door-type structure. Two foldable and flippable bottom plates 8 are arranged on both sides of the door-type structure. The two bottom plates 8 are respectively against the column 2 and the supporting column 4 and are detachable. When it is necessary to lift a heavy object, the hook of the electric hoist 5 is hung on the heavy object, and then the heavy object is lifted. The heavy object passes through the gap between the two bottom plates 8, and the two bottom plates 8 do not block the heavy object. After lifting the heavy object, if it is necessary to move the heavy object, the relevant personnel can directly flip down the two bottom plates 8 through the flipping mechanism. At this time, the two bottom plates 8 are connected in a horizontal side-by-side manner, and then the heavy object is placed on the two bottom plates 8 through the electric hoist 5, and then the entire device is pushed by the universal wheel 18, so as to achieve the purpose of moving the heavy object. Compared with the prior art, which requires an additional conveying trolley to move the heavy object, The device has two flippable bottom plates 8. When the two bottom plates 8 are flipped to be horizontal and side by side, heavy objects can be placed and transported, thereby achieving the beneficial effect of having a stable transportation function. In addition, due to the characteristics of the door-type structure, the two bottom plates 8 are usually in a state of leaning against the columns 2 and the support columns 4. When it is necessary to lift heavy objects above some equipment, the top beam 1 can slide to the top of the relevant equipment through the universal wheels 18 to lift the heavy objects. After the heavy objects are moved to the destination, the electric hoist 5 lifts the heavy objects again, and then the two bottom plates 8 are flipped and folded and docked on the columns 2 and the support columns 4 through the flipping mechanism, and then the entire device is pushed. Since the two bottom plates 8 are docked on the columns 2 and the support columns 4 at this time, the lifted heavy objects can be pushed to the top of the relevant equipment and then put down (for example, two electrical control cabinets are stacked in a factory).

[0027] Further optimization of this scheme, when the above-mentioned moving heavy objects to the destination, if there is a situation where the portal structure cannot pass (for example, placing equipment on the assembly line), since one side of the top beam 1 is detachably connected to the column 2, the relevant personnel can disassemble one side of the top beam 1 and then rotate the rotating sleeve 3 to rotate the top beam 1, the electric hoist 5 and the heavy object to the target position, and then lower the heavy object. This scheme is a good solution for some scenes in the prior art that are inconvenient to install or place. On the contrary, if it is necessary to lift the heavy object in a scene where the portal structure cannot pass, this scheme will also be applicable. By rotating the sleeve 3 and the support column 4, the top beam 1, the electric hoist 5 and the heavy object can be rotated to the target position together, solving the scene in the prior art where the portal structure is inconvenient to install or place, and achieving the beneficial effect of being applicable to a variety of scenes. In addition, the electric hoist 5 and its connection method with the top beam 1 are existing conventional technologies, and its installation and connection method can be fully realized by personnel in this technical field. The present invention does not involve the modification of the electric hoist 5, so it will not be repeated.

[0028] Furthermore, the flipping mechanism includes a mounting seat 12, a rotating shaft 9 and two connecting rods 11. The mounting seat 12 is provided with a through hole, and the rotating shaft 9 can be rotatably inserted into the through hole. The two ends of the rotating shaft 9 are respectively fixedly connected to one end of the two connecting rods 11, and the other ends of the two connecting rods 11 are fixedly connected to one of the base plates 8. The mounting seats 12 in the flipping mechanism on different sides of the first beam 6 and the second beam 7 are respectively fixedly connected to the first beam 6 and the second beam 7. Through the two connecting rods 11 fixedly connected to the base plate 8, the rotating shaft 9 rotates together with the base plate 8 when the base plate 8 is flipped, thereby achieving the purpose of rotating the base plate 8. In addition, there is a certain gap between the base plate 8 and the column 2, and between the other base plate 8 and the support column 4. This gap is used for the two base plates 8 to be flipped normally to prevent the base plate 8 from contacting the column 2 or the support column 4 when flipping.

[0029] Furthermore, the support column 4 and the rotating sleeve 3 are both cylindrical structures, and a cavity with an opening is provided at the bottom of the rotating sleeve 3, and the opening is vertically arranged downward. One end of the support column 4 is inserted in the cavity, and one end of the support column 4 inserted into the cavity is provided with a bearing 19, and the inner steel ring of the bearing 19 is fixedly connected to the side of the support column 4, and the outer steel ring of the bearing 19 is fixedly connected to the inner wall of the cavity of the rotating sleeve 3. The bearing 19 is used to rotatably connect the support column 4 and the rotating sleeve 3. The bearing 19 is an existing conventional technology, and its installation and connection method can be fully realized by personnel in this technical field. The present invention does not involve the modification of the bearing 19, so it will not be repeated. The bearing 19 can be a ball bearing, a normal bearing, etc., which is used to drive the rotation. By rotating the rotating sleeve 3 on the bearing 19, the functions of the above-mentioned rotating top beam 1, electric hoist 5 and heavy objects can be realized.

[0030] Furthermore, it includes a first mounting block 13, a second mounting block 14 and a latch 15. The bottom of the first mounting block 13 is fixedly connected to one end of the column 2 close to the top beam 1, and the top of the second mounting block 14 is fixedly connected to one end of the top beam 1 close to the column 2. The first mounting block 13 and the second mounting block 14 are abutted. The first mounting block 13 and the second mounting block 14 are both provided with a plurality of through holes of the same size, and the through holes are arranged in a vertical direction. The latch 15 can be slidably inserted into the through holes and penetrate the first mounting block 13 and the second mounting block 14. When one end of the top beam 1 is against the column 2, the first mounting block 13 and the second mounting block 14 are in surface contact, and the latch 15 penetrates the two, thereby preventing rotation. When the shaft sleeve 3 needs to be rotated as mentioned above, the latch 15 can be removed, and the operation is simple and convenient.

[0031] Furthermore, it also includes a fixed seat 16 and two fixed rods 10, and any one of the bottom plates 8 is fixedly connected to the two fixed seats 16 on one side away from the flip mechanism, and the two fixed seats 16 are arranged side by side. The column 2, the support column 4 and the fixed seat 16 are all provided with through holes adapted to the fixed rods 10, and any one of the fixed rods 10 can be slidably inserted into the through holes of the column 2 and the two fixed seats 16 on the same side thereof, and the other fixed rod 10 can be slidably inserted into the through holes of the support column 4 and the two fixed seats 16 on the same side thereof, and the column 2 and the support column 4 are both arranged on the same side thereof. Between the two fixing seats 16 on the side, one end of the fixing rod 10 is fixedly connected with a stopper, and the other end of the fixing rod 10 is threadedly connected with a nut, and the stopper and the nut are both used to prevent the fixing rod 10 from sliding out of the through hole. When the two base plates 8 are against the column 2 and the support column 4, one fixing rod 10 passes through the fixing seat 16 and the column 2 of the same base plate 8, and the other fixing rod 10 passes through the fixing seat 16 and the support column 4 of the other base plate 8, and stops and nuts are respectively provided at both ends of the fixing rod 10 for preventing falling off. The fixing rod 10 plays the role of fixing the base plate 8. When the base plate 8 needs to be flipped, the nut can be removed to slide out the fixing rod 10.

[0032] Further, the first cross beam 6, the second cross beam 7 and the two bottom plates 8 are each provided with two through holes adapted to the fixing rod 10, the through holes are concentrically arranged, and the fixing rod 10 passes through the first cross beam 6, the second cross beam 7 and the two bottom plates 8. When the rotating sleeve 3 drives the top beam 1 to rotate, the two fixing rods 10 are respectively inserted into the two through holes. In the process of rotating the rotating sleeve 3, as shown in FIG. Figure 3 As shown, when the top beam 1 rotates 180 degrees, the center of gravity of the entire device will lean against one end of the heavy object. In order to balance the entire device, two fixing rods 10 are inserted into the two through holes. At this time, the columns 2, the support columns 4 and the two bottom plates 8 form a whole through the fixing rods 10. The fixing rods 10 inserted into the through holes are equivalent to playing the role of a counterweight on the left side of the entire device. At this time, the center of gravity of the entire device is balanced again. Therefore, in order to balance the center of gravity, the bottom plate 8 and the columns 2 should be made of materials with higher density to play the role of a counterweight. In addition, the fixing rods 10 play the role of fixing the bottom plate 8 when the bottom plate 8 leans against the columns 2 and the support columns 4. After the bottom plate 8 is flipped to be horizontally side by side, it is inserted into the above-mentioned through holes, which plays a multi-purpose role and prevents the fixing rods 10 from being accidentally lost.

[0033] Furthermore, there are eight universal wheels 18, and the bottom of the first cross beam 6, the second cross beam 7 and the two bottom plates 8 are all fixedly connected with two universal wheels 18 and are horizontally arranged side by side. When the two fixing rods 10 are inserted into the first cross beam 6, the second cross beam 7 and the two bottom plates 8, the eight universal wheels 18 are on the same horizontal plane and are all in contact with the ground. In the above-mentioned process of moving the heavy object, in order to ensure the stability of the movement, the fixing rod 10 needs to be inserted into the through holes of the first cross beam 6, the second cross beam 7 and the two bottom plates 8. At this time, the eight universal wheels 18 are evenly stressed at the bottom of the entire device, which serves the purpose of ensuring the stability of the movement. In addition, the universal wheels 18 are existing conventional technologies, and their installation and connection methods can be fully implemented by personnel in this technical field. The present invention does not involve the modification of the electric hoist 5, so it will not be repeated.

[0034] Furthermore, it also includes a reinforcing rib 17, one end of the reinforcing rib 17 is fixedly connected to the top beam 1, and the other end of the reinforcing rib 17 is fixedly connected to the rotating sleeve 3. The reinforcing rib 17 is an I-beam, and the reinforcing rib 17 plays a role in stabilizing the top beam 1.

[0035] In the description of the present invention, it should be understood that the terms "counterclockwise", "clockwise", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

Claims

1. A gantry crane, characterized in that: The invention comprises a top beam (1), a column (2), a support column (4), a rotating sleeve (3), a first cross beam (6), a second cross beam (7), a flip mechanism and two bottom plates (8), wherein the top beam (1) is an I-beam, the top beam (1) is arranged horizontally, one end of the top beam (1) is fixedly connected to one end of the rotating sleeve (3), the other end of the top beam (1) is detachably connected to one end of the column (2), the rotating sleeve (3) and the column (2) are arranged vertically and side by side, and the rotating sleeve (3) and the column (2) are arranged vertically and side by side. An electric hoist (5) is provided between the columns (2), the electric hoist (5) is arranged below the top beam (1) and connected to the top beam (1), the electric hoist (5) is used to lift heavy objects, one end of the rotating sleeve (3) away from the top beam (1) is rotatably connected to one end of the support column (4), the rotating sleeve (3) is used to drive the top beam (1) to rotate along the rotating sleeve (3) as the rotation center, the other end of the support column (4) is fixedly connected to the second cross beam (7), the rotating sleeve ( 3) is arranged concentrically with the support column (4), one end of the column (2) away from the top beam (1) is fixedly connected to the first cross beam (6), the first cross beam (6) and the column (2) are in a "T"-shaped structure, the second cross beam (7) and the support column (4) are in a "T"-shaped structure, the two "T"-shaped structures are parallel to each other, the first cross beam (6) and the second cross beam (7) are both provided with the flipping mechanism, and the flipping mechanism is used to respectively flip the two bottom plates (8) along the flipping mechanism as the center The two bottom plates (8) are used to carry the weight when placed side by side horizontally, the two bottom plates (8) are respectively detachably connected to the upright column (2) and the support column (4), there is a gap between the two bottom plates (8), the gap is used for the electric hoist (5) to raise or lower the weight, the first crossbeam (6), the second crossbeam (7) and the bottom of the two bottom plates (8) are all fixedly connected with universal wheels (18), and the universal wheels (18) are used to move the entire device; The flip mechanism comprises a mounting seat (12), a rotating shaft (9) and two connecting rods (11); the mounting seat (12) is provided with a through hole, the rotating shaft (9) is rotatably inserted into the through hole, the two ends of the rotating shaft (9) are respectively fixedly connected to one end of the two connecting rods (11), the other ends of the two connecting rods (11) are both fixedly connected to one of the bottom plates (8), and the mounting seats (12) in the flip mechanism on different sides of the first cross beam (6) and the second cross beam (7) are respectively fixedly connected to the first cross beam (6) and the second cross beam (7); The support column (4) and the rotating sleeve (3) are both cylindrical structures. A cavity with an opening is provided at the bottom of the rotating sleeve (3), and the opening is arranged vertically downward. One end of the support column (4) is inserted into the cavity. A bearing (19) is provided at the end of the support column (4) inserted into the cavity. The inner steel ring of the bearing (19) is fixedly connected to the side of the support column (4), and the outer steel ring of the bearing (19) is fixedly connected to the inner wall of the cavity of the rotating sleeve (3). The bearing (19) is used to rotatably connect the support column (4) and the rotating sleeve (3); It also includes a fixed seat (16) and two fixed rods (10), and any one of the bottom plates (8) is fixedly connected to the two fixed seats (16) on one side away from the flip mechanism, and the two fixed seats (16) are arranged side by side. The column (2), the support column (4) and the fixed seat (16) are all provided with through holes adapted to the fixed rods (10), and any one of the fixed rods (10) can be slidably inserted into the through holes of the column (2) and the two fixed seats (16) on the same side thereof, and the other fixed rod (10) can be slidably inserted into the through holes of the support column (4) and the two fixed seats (16) on the same side thereof, and the column (2) and the support column (4) are both arranged between the two fixed seats (16) on the same side thereof.

2. A gantry crane according to claim 1, characterized in that: The invention also comprises a first mounting block (13), a second mounting block (14) and a latch (15); the bottom of the first mounting block (13) is fixedly connected to one end of the column (2) close to the top beam (1); the top of the second mounting block (14) is fixedly connected to one end of the top beam (1) close to the column (2); the first mounting block (13) and the second mounting block (14) are in abutment with each other; the first mounting block (13) and the second mounting block (14) are both provided with a plurality of through holes of the same size, the through holes being arranged in a vertical direction; the latch (15) can be slidably inserted into the through holes and penetrates the first mounting block (13) and the second mounting block (14).

3. A gantry crane according to claim 1, characterized in that: A stopper is fixedly connected to one end of the fixing rod (10), and a nut is threadedly connected to the other end of the fixing rod (10); the stopper and the nut are both used to prevent the fixing rod (10) from sliding out of the through hole.

4. A gantry crane according to claim 1, characterized in that: The first cross beam (6), the second cross beam (7) and the two bottom plates (8) are all provided with two through holes adapted to the fixing rod (10), the through holes being arranged concentrically, and the fixing rod (10) is used to pass through the first cross beam (6), the second cross beam (7) and the two bottom plates (8), and when the rotating sleeve (3) drives the top beam (1) to rotate, the two fixing rods (10) are respectively inserted into the two through holes.

5. A gantry crane according to claim 4, characterized in that: There are eight universal wheels (18), and two universal wheels (18) are fixedly connected to the bottom of the first cross beam (6), the second cross beam (7) and the two bottom plates (8) and are arranged horizontally side by side. When the two fixing rods (10) are inserted into the first cross beam (6), the second cross beam (7) and the two bottom plates (8), the eight universal wheels (18) are on the same horizontal plane and are in contact with the ground.

6. A gantry crane according to claim 1, characterized in that: It also includes a reinforcing rib (17), one end of the reinforcing rib (17) is fixedly connected to the top beam (1), and the other end of the reinforcing rib (17) is fixedly connected to the rotating shaft sleeve (3), and the reinforcing rib (17) is an I-beam.

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