CN214780346U - Gantry crane - Google Patents

Abstract

The utility model provides a gantry crane, include: the lifting mechanism is arranged on the door frame mechanism; the door frame mechanism comprises a cross beam and main beams arranged at two ends of the cross beam, and the main beams are connected with the supporting leg mechanism; the hoisting mechanism comprises a large overhead traveling crane frame and a small vehicle structure, the large overhead traveling crane frame is arranged on the main beam and is suitable for moving along the length direction of the main beam, and the small vehicle structure is arranged on the large overhead traveling crane frame and is suitable for moving along the length direction of the large overhead traveling crane frame; and the two ends of the large frame of the overhead travelling crane extend towards the direction far away from the main beam. The utility model discloses a set up big frame of overhead traveling crane and dolly structure on the gantry crane as prefabricated building erects construction equipment, promoted the range of lifting by crane that gantry crane lifted by crane the heavy object through the dolly structure to promote gantry crane's application scope and prefabricated building's the efficiency of erectting, and reduced the cost that prefabricated building erects construction equipment.

Description

Gantry crane

Technical Field

The utility model relates to a hoisting machinery technical field particularly, relates to a gantry crane.

Background

At present, due to the characteristics of large number of beam pieces, irregular placement, narrow space and the like, the erection of an assembly type building in a foundation pit requires the mutual cooperation of a plurality of gantry cranes, so that the efficiency is low, and the cost for erecting construction equipment is increased; and there are many situations that the beam pieces in irregular areas cannot be erected, so that the whole erection process of the fabricated building is complicated and inefficient.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem be: how to provide a fabricated building erection construction equipment to reduce the cost of equipment, promote the application scope of equipment.

In order to solve the above problem, the utility model provides a gantry crane, include: the lifting device comprises a cart mechanism, a door frame mechanism, a support leg mechanism suitable for connecting the cart mechanism and the door frame mechanism, and a lifting mechanism arranged on the door frame mechanism; the door frame mechanism comprises a cross beam and main beams arranged at two ends of the cross beam, and the main beams are connected with the supporting leg mechanism; the hoisting mechanism comprises a large overhead traveling crane frame and a small vehicle structure, the large overhead traveling crane frame is arranged on the main beam and is suitable for moving along the length direction of the main beam, and the small vehicle structure is arranged on the large overhead traveling crane frame and is suitable for moving along the length direction of the large overhead traveling crane frame; and the two ends of the large frame of the overhead travelling crane extend towards the direction far away from the main beam.

Optionally, two main beams are provided, and the two main beams are parallel to each other; the crossbeam with the big frame of overhead traveling crane all is perpendicular to the girder, just the crossbeam sets up two between the girder, the big frame of overhead traveling crane sets up the lower extreme of girder, the dolly structure sets up the lower extreme of the big frame of overhead traveling crane.

Optionally, two sets of the leg mechanisms are provided, and a space is formed between the two sets of the leg mechanisms; the main beam is provided with a connecting part between the two groups of the supporting leg mechanisms and cantilevers positioned at two ends of the connecting part; and the cantilever arm extends away from the leg mechanism; the overhead traveling crane large frame is arranged on the connecting part and/or the cantilever.

Optionally, a first guide rail arranged along the length direction of the main beam is arranged at the lower end of the main beam, and the large frame of the overhead traveling crane is suitable for sliding along the first guide rail; the lower extreme of the big frame of overhead traveling crane is equipped with the edge the second guide rail that the length direction of the big frame of overhead traveling crane set up, dolly structure is suitable for to follow the second guide rail slides.

Optionally, the first guide rail includes protruding extensions provided on both sides of the lower end of the main beam, the crane frame includes a frame body and a connecting seat provided on the upper end of the frame body, the connecting seat is provided with a chute extending through the connecting seat along the length direction of the main beam, and the extensions are adapted to be inserted into the chute.

Optionally, the crane cart frame further includes a pulley disposed on the connecting seat, and the pulley is located in the chute and located at the upper end and the lower end of the extending portion; the pulley is adapted to be in rolling connection with the extension.

Optionally, the crown block frame comprises a stop structure, and the stop structure is arranged at two ends of the second guide rail.

Optionally, the cart mechanism comprises a frame and a running wheel set arranged at the lower end of the frame, and the leg mechanism is arranged at the upper end of the frame; the frame and the running wheel set are adapted to rotate about the leg mechanism.

Optionally, the support device further comprises a connecting structure, the upper end of the support leg mechanism extends towards the direction far away from the main beam, one end of the connecting structure is connected with the upper end of the support leg mechanism, and the other end of the connecting structure is connected with the main beam and has a distance with the support leg mechanism.

Optionally, the trolley structure includes a trolley body, a lifting device, and a lifting cable connecting the trolley body and the lifting device, the trolley body is disposed on the large frame of the overhead traveling crane and adapted to move along the length direction of the large frame of the overhead traveling crane, and the lifting device is adapted to rotate around the lifting cable and move in the vertical direction through the lifting cable.

Compared with the prior art, the utility model, following beneficial effect has: the gantry crane is used as the erection construction equipment of the fabricated building, the large frame of the crown block is arranged on the gantry crane, and the trolley structure suitable for hoisting heavy objects is arranged on the large frame of the crown block, so that the trolley structure can move along the length direction of the large frame of the crown block in the process of hoisting heavy objects, and can also move along the length direction of the main beam through the large frame of the crown block, the moving range of the trolley structure is greatly improved, and the hoisting range of the gantry crane is improved; on the other hand, the erection of the fabricated building in the foundation pit can be completed by a single gantry crane, the cost of the fabricated building erection construction equipment is reduced, the situations that the operation process is complex and risks are easy to occur when a plurality of devices are used for erecting the fabricated building are avoided, and the erection efficiency of the gantry crane during erection of the fabricated building is further improved.

Drawings

Fig. 1 is a schematic structural diagram of a gantry crane according to an embodiment of the present invention;

fig. 2 is a schematic structural view of another view angle of the gantry crane according to the embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

fig. 4 is a schematic structural view of a large frame of an overhead traveling crane in an embodiment of the present invention;

fig. 5 is a schematic structural view of another view angle of the large frame of the overhead traveling crane in the embodiment of the present invention;

fig. 6 is a schematic structural view of another view angle of the large frame of the overhead traveling crane in the embodiment of the present invention;

fig. 7 is a schematic structural diagram of a foundation pit in an embodiment of the present invention;

fig. 8(a) and 8(b) are schematic structural diagrams of the embodiment of the present invention when the gantry crane moves to the edge of the foundation pit to prepare for lifting the longitudinal beam;

fig. 9(a) and 9(b) are schematic structural diagrams of the gantry crane in the embodiment of the present invention when the gantry crane lifts the longitudinal beam;

fig. 10(a) and 10(b) are schematic structural views of a gantry crane for erecting longitudinal beam pieces according to an embodiment of the present invention;

fig. 11(a) and 11(b) are schematic structural diagrams of the embodiment of the present invention when the gantry crane moves to the edge of the foundation pit to prepare for lifting the beam piece;

fig. 12(a) and 12(b) are schematic structural diagrams of the gantry crane for lifting the beam piece according to the embodiment of the present invention;

fig. 13(a) and 13(b) are schematic structural diagrams of the gantry crane for erecting the beam piece according to the embodiment of the present invention.

Description of reference numerals:

1-a cart mechanism, 11-a frame and 12-a running wheel set; 2-door frame mechanism, 21-main beam, 211-connecting part, 212-cantilever, 213-first guide rail, 2131-extension, 22-cross beam; 3-a leg support mechanism; 4-hoisting mechanism, 41-big frame of overhead traveling crane, 411-big frame body, 412-connecting seat, 4121-first connecting plate, 4122-second connecting plate, 4123-sliding groove, 413-second guide rail, 414-pulley, 415-stopping structure, 42-small car structure, 421-small car body, 422-hoisting cable, 423-lifting appliance; 5-a linking structure; 6-beam piece, 61-longitudinal beam piece, 62-transverse beam piece; 7-foundation pit, 8-pedestal.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

In the coordinate system XYZ provided herein, the X axis represents forward, the X axis represents backward, the Y axis represents forward, the Y axis represents leftward, the Z axis represents forward, and the Z axis represents backward. Also, it is noted that the terms "first," "second," and the like in the description and claims of the present invention and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein.

With reference to fig. 1 and 2, an embodiment of the present invention provides a gantry crane, including: the device comprises a cart mechanism 1, a doorframe mechanism 2, a supporting leg mechanism 3 suitable for connecting the cart mechanism 1 and the doorframe mechanism 2 and a hoisting mechanism 4 arranged on the doorframe mechanism 2; the door frame mechanism 2 comprises a cross beam 22 and main beams 21 arranged at two ends of the cross beam 22, and the main beams 21 are connected with the supporting leg mechanism 3; the hoisting mechanism 4 comprises a large overhead traveling crane frame 41 and a small vehicle structure 42, the large overhead traveling crane frame 41 is arranged on the main beam 21 and is suitable for moving along the length direction of the main beam 21, and the small vehicle structure 42 is arranged on the large overhead traveling crane frame 41 and is suitable for moving along the length direction of the large overhead traveling crane frame 41; and both ends of the crown block large frame 41 extend in a direction away from the main beam 21.

In this embodiment, the operation of gantry crane as fabricated building erection construction equipment can be controlled manually, also can be machine control, for example through setting up control mechanism on gantry crane to with parts such as hoisting mechanism 4 and control mechanism electricity be connected, utilize control mechanism to control gantry crane's operation, with the degree of automation that improves gantry crane, promote gantry crane's efficiency of construction. The cart mechanism 1 of the gantry crane is used for walking on a supporting surface (such as the ground) so as to realize the movement of the gantry crane; the lower end of the supporting leg mechanism 3 (i.e. the supporting leg mechanism 3 is located at the end opposite to the Z axis in fig. 1) is arranged on the cart mechanism 1, and the door frame mechanism 2 is arranged on the supporting leg mechanism 3 and has a certain distance with the cart mechanism 1, so that the gantry crane can conveniently lift a heavy object (such as a beam piece 6 of an assembly building) to a certain height for transportation or erection. Specifically, the door frame mechanism 2 is a frame structure, and includes a cross beam 22 and a main beam 21, that is, the cross beam 22 and the main beams 21 disposed at two ends of the cross beam 22 form a frame structure; so, both guaranteed door frame mechanism 2's structural strength, made door frame mechanism 2 have advantages such as the dead weight is light again, save material and cost, and made the easy standardization of production of crossbeam 22 and girder 21, regularization, further reduced gantry crane's manufacturing cost. The gantry crane lifts heavy objects such as beam pieces 6 and the like through a trolley structure 42 arranged on a large frame 41 of the overhead travelling crane, the large frame 41 of the overhead travelling crane is suitable for moving along the length direction of the main beam 21, and the trolley structure 42 is suitable for moving along the length direction of the large frame 41 of the overhead travelling crane; like this, promoted dolly structure 42's home range to promote gantry crane's the scope of lifting by crane, make gantry crane can be applicable to multiple use place. The both ends of the big frame 41 of overhead traveling crane extend towards the direction of keeping away from girder 21, have further promoted the range of movement of dolly structure 42 to greatly promoted gantry crane's application scope.

By arranging the large crown block frame 41 on the portal crane serving as the erection construction equipment of the prefabricated building and arranging the trolley structure 42 suitable for hoisting heavy objects on the large crown block frame 41, the trolley structure 42 can move along the length direction of the large crown block frame 41 in the process of hoisting heavy objects and can also move along the length direction of the main beam 21 through the large crown block frame 41, the moving range of the trolley structure 42 is greatly expanded, so that the hoisting range of the portal crane is expanded, on one hand, the portal crane is also suitable for erecting beam pieces 6 of the prefabricated building in an irregular area (a foundation pit 7 of the prefabricated building), and the application range of the portal crane and the erection efficiency of the prefabricated building are greatly expanded; on the other hand, the erection of the prefabricated building in the foundation pit 7 can be completed by a single portal crane, the cost of the prefabricated building erection construction equipment is reduced, the situations that the operation process is complex and risks are easy to occur when a plurality of devices are used for erecting the prefabricated building are avoided, and the erection efficiency of the portal crane during erection of the prefabricated building is further improved.

Optionally, as shown in fig. 1 and 2, two main beams 21 are provided, and the two main beams 21 are parallel to each other; the cross beam 22 and the large frame 41 of the overhead traveling crane are both perpendicular to the main beams 21, the cross beam 22 is arranged between the two main beams 21, the large frame 41 of the overhead traveling crane is arranged at the lower end of the main beams 21, and the small frame 42 is arranged at the lower end of the large frame 41 of the overhead traveling crane.

In this embodiment, the two main beams 21 of the door frame mechanism 2 are parallel to each other, and the plurality of cross beams 22 are disposed between the two main beams 21; the cross beam 22 is used to connect the two main beams 21 to improve the structural strength of the door frame structure 2. Furthermore, it is preferable that the plurality of cross beams 22 are parallel to each other and perpendicular to the main beam 21, so that the production of the cross beams 22 and the main beam 21 is easy to standardize and finalize, thereby reducing the manufacturing difficulty and cost of the door frame mechanism 2. The large overhead traveling crane frame 41 is arranged at the lower end of the main beam 21 (namely, the main beam 21 is positioned at the end with the reverse Z-axis in fig. 1), and the large overhead traveling crane frame 41 is connected with the two main beams 21, so as to improve the connection stability of the large overhead traveling crane frame 41 and the frame mechanism 2 and the stability of the large overhead traveling crane frame 41 in moving along the length direction of the main beam 21, and ensure that the trolley structure 42 arranged on the large overhead traveling crane frame 41 can stably lift a heavy object; the small vehicle structure 42 is also disposed at the lower end of the large frame 41 (i.e. the end of the large frame 41 opposite to the Z axis in fig. 1), so as to avoid the main beam 21 interfering with the small vehicle structure 42 to lift the heavy object.

Optionally, as shown in fig. 1 and fig. 2, two sets of leg mechanisms 3 are provided, and a space is provided between the two sets of leg mechanisms 3; the main beam 21 is provided with a connecting part 211 between the two groups of leg mechanisms 3, and cantilevers 212 at two ends of the connecting part 211; and the cantilever 212 extends away from the leg mechanism 3; the overhead traveling crane cart 41 is provided on the connection portion 211 and/or the cantilever 212.

In this embodiment, two sets of leg mechanisms 3 are preferably provided, and the two sets of leg mechanisms 3 are arranged at intervals along the length direction of the main beam 21; each group of the leg mechanisms 3 is provided with two leg mechanisms 3 to be respectively connected with two main beams 21; so, landing leg mechanism 3 is equipped with four to guarantee gantry crane's stability, make gantry crane be suitable for to play the heavy object that has great quality. The main beam 21 comprises a connecting part 211 and a cantilever 212, the connecting part 211 is arranged between the two sets of leg mechanisms 3, and the cantilever 212 is arranged at two ends of the connecting part 211 and extends towards a direction far away from the leg mechanisms 3; the crane large frame 41 may be disposed on the connecting portion 211, may be disposed on the cantilever 212, or may be disposed on both the connecting portion 211 and the cantilever 212. Because the big frame 41 of overhead traveling crane sets up at girder 21 lower extreme, can't stride across landing leg mechanism 3 when leading to the big frame 41 of overhead traveling crane to remove along girder 21 length direction, therefore, for guaranteeing that portal crane has extensive application scope and can be applicable to different places, preferably all be equipped with big frame 41 of overhead traveling crane on connecting portion 211 and the cantilever 212, that is to say, the big frame 41 of three overhead traveling crane sets up respectively in connecting portion 211 lower extreme department and the lower extreme department that is located two cantilevers 212 at connecting portion 211 length direction both ends, and, the dolly structure 42 that sets up on the big frame 41 of three overhead traveling crane can lift by crane the heavy object simultaneously or lift by crane the heavy object alone, in order to further promote portal crane's application scope, enrich portal crane's operational mode.

Optionally, as shown in fig. 1 to 6, the lower end of the main beam 21 is provided with a first guide rail 213 arranged along the length direction of the main beam 21, and the crane cart frame 41 is adapted to slide along the first guide rail 213; the lower end of the crane cart frame 41 is provided with a second guide rail 413 arranged along the length direction of the crane cart frame 41, and the trolley structure 42 is adapted to slide along the second guide rail 413.

In this embodiment, the crane cart frame 41 is connected to the main beam 21 through the first guide rail 213, and is adapted to move along the length direction of the main beam 21; the trolley structure 42 is connected to the crane metro frame 41 via a second guide rail 413 and is adapted to move along the length direction of the crane metro frame 41. The movement of the crane cart frame 41 on the main beam 21 and the movement of the trolley structure 42 on the crane cart frame 41 may be driven by a motor or by an oil cylinder (for example, pushed by a hydraulic oil cylinder). The first guide rail 213 is arranged along the length direction of the main beam 21, that is, the axis of the first guide rail 213 is parallel to the axis of the main beam 21, so as to ensure the directional movement of the large frame 41 of the overhead travelling crane; similarly, the second guide rail 413 is disposed along the length direction of the crane metro frame 41, i.e. the axis of the second guide rail 413 is parallel to the axis of the crane metro frame 41, to ensure the directional movement of the trolley structure 42 on the crane metro frame 41.

Optionally, as shown in fig. 1 and fig. 2, the first guide rail 213 includes extension portions 2131 protruding from two sides of the lower end of the main beam 21, the large frame 41 of the crown block includes a large frame body 411 and a connection seat 412 disposed at the upper end of the large frame body 411, the connection seat 412 is provided with a sliding groove 4123 penetrating through the connection seat 412 along the length direction of the main beam 21, and the extension portions 2131 are adapted to be inserted into the sliding groove 4123.

The first guide rail 213 (the second guide rail 413) may be a groove or a ridge structure to guide the directional traverse of the crane cart frame 41 (the trolley structure 42). In this embodiment, the first guide rail 213 includes an extension 2131 protruding from both sides of the lower end of the main beam 21 (i.e., the lower end of the main beam 21 is located on both sides in the X-axis direction in fig. 2), so that the cross section of the main beam 21 is T-shaped; the upper end of the large frame body 411 of the large frame 41 of the overhead traveling crane (namely, the end of the large frame body 411 located in the positive direction of the Z axis in fig. 1) is provided with a connecting seat 412, the connecting seat 412 is provided with a sliding groove 4123, the lower end of the main beam 21 and the extending parts 2131 on both sides of the lower end of the main beam 21 are both suitable for being inserted in the sliding groove 4123, and thus, the stability of the connection between the main beam 21 and the large frame 41 of the overhead traveling crane is ensured through the insertion and matching of the extending parts 2131 and the sliding groove 4123; furthermore, the slide groove 4123 penetrates the connection seat 412 along the length direction of the main beam 21, so that the large frame 41 of the overhead traveling crane is adapted to move on the main beam 21 along the length direction of the main beam 21.

Optionally, as shown in fig. 1, fig. 2, fig. 4-fig. 6, the crane cart frame 41 further includes a pulley 414 disposed on the connecting seat 412, and the pulley 414 is located in the sliding groove 4123 and located at the upper and lower ends of the extending portion 2131; the pulley 414 is adapted to be in rolling connection with the extension 2131.

Based on the big frame 41 of the overhead traveling crane comprises a big frame body 411 and a connecting seat 412, in this embodiment, the connecting seat 412 comprises a first connecting plate 4121 and a second connecting plate 4122 which are oppositely arranged, the cross sections of the first connecting plate 4121 and the second connecting plate 4122 are both L-shaped, and the first connecting plate 4121, the second connecting plate 4122 and the sliding groove 4123 of which the side surface is T-shaped are enclosed by the upper end surface of the big frame body 411 (i.e. the end surface of the big frame body 411 located at the positive end of the Z axis in fig. 1), so that the main beam 21 of which the cross section is T-shaped is in inserting fit with the sliding groove 4123. In order to reduce the friction force when the connecting seat 412 and the main beam 21 (the extending part 2131) move relatively, it is preferable that the connecting seat 412 is provided with a pulley 414, and the pulley 414 is arranged in the sliding groove 4123 and is located at the upper end and the lower end of the extending part 2131, so that the pulley 414 is adapted to roll on the upper end surface (i.e. the end surface of the extending part 2131 located at the positive end of the Z axis in fig. 1) or the lower end surface (i.e. the end surface of the extending part 2131 located at the negative end of the Z axis in fig. 1) of the extending part 2131; therefore, the friction force generated when the connecting seat 412 and the main beam 21 (the extending part 2131) move relatively is reduced, the abrasion of the connecting seat 412 and the main beam 21 (the extending part 2131) during the relative movement is effectively reduced, the service lives of the large frame 41 and the main beam 21 of the overhead travelling crane are prolonged, and the use cost of the portal crane is reduced.

Further, the connection of the trolley structure 42 to the crane metro frame 41 may be similar to the connection of the crane metro frame 41 to the main beam 21.

Alternatively, as shown in fig. 5, the crane cart 41 includes a stop 415, and the stop 415 is disposed at both ends of the second guide rail 413.

In this embodiment, the two ends of the second guide rail 413 of the large frame 41 of the overhead traveling crane are provided with the stopping structures 415, so as to prevent the trolley structure 42 from separating from the large frame 41 of the overhead traveling crane from the two ends of the second guide rail 413, thereby improving the safety and reliability of the gantry crane. Further, the large frame 41 of the overhead traveling crane can limit the moving range of the large frame 41 of the overhead traveling crane through the supporting leg mechanism 3 and the cross beam 22 arranged at the end of the main beam 21, so as to prevent the large frame 41 of the overhead traveling crane from separating from the main beam 21; it is also possible to provide a structure like the stopper 415 at a corresponding position of the first guide rail 213 of the main beam 21 to limit the moving range of the large frame 41 of the overhead traveling crane, to avoid the large frame 41 of the overhead traveling crane from being separated from the main beam 21, or to avoid the large frame 41 of the overhead traveling crane from colliding with the leg mechanism 3 or the cross member 22.

Alternatively, as shown in fig. 1 and fig. 2, the cart mechanism 1 includes a frame 11 and a running wheel set 12 disposed at a lower end of the frame 11, and the leg mechanism 3 is disposed at an upper end of the frame 11; the frame 11 and the running wheels 12 are adapted to rotate about the leg unit 3.

The upper end of the frame 11 (i.e. the end of the frame 11 located in the positive direction of the Z axis in fig. 1) is connected with the lower end of the leg mechanism 3 (i.e. the end of the leg mechanism 3 located in the negative direction of the Z axis in fig. 1) to support the leg mechanism 3; the lower end of the frame 11 is provided with a walking wheel set 12, and the walking wheel set 12 is used for realizing the walking of the portal crane on a supporting surface. The cart mechanism 1 is suitable for rotating around the supporting leg mechanism 3, namely the frame 11 and the running wheel set 12 are suitable for rotating around the supporting leg mechanism 3 so as to realize the steering of the portal crane; for example, the gantry crane can be directly switched between the traverse movement (i.e., the gantry crane moves in the Y-axis direction in fig. 7) and the longitudinal movement (i.e., the gantry crane moves in the X-axis direction in fig. 7) by turning the cart mechanism 1 by 90 °.

It is worth to be noted that the cart mechanism 1 is arranged at the lower end of each supporting leg mechanism 3; and the steering of all cart mechanisms 1 of the gantry crane is consistent so as to ensure the smooth movement of the gantry crane.

Optionally, as shown in fig. 1 and fig. 2, the gantry crane further includes a connecting structure 5, an upper end of the leg mechanism 3 extends toward a direction away from the main beam 21, one end of the connecting structure 5 is connected to the upper end of the leg mechanism 3, and the other end of the connecting structure 5 is connected to the main beam 21 and spaced from the leg mechanism 3.

In this embodiment, the connecting structure 5 may be at least one of a pull rod and a pull cable, and is used for connecting the upper end of the leg mechanism 3 (i.e., the end of the leg mechanism 3 located in the positive direction of the Z axis in fig. 1) with the main beam 21; in order to avoid the connecting structure 5 interfering with the movement of the large frame 41 of the overhead travelling crane, the upper end of the leg mechanism 3 extends towards a direction away from the main beam 21, that is, a certain vertical distance is reserved between the upper end of the leg mechanism 3 and the main beam 21, and the connecting structure 5 is used for connecting the upper end of the leg mechanism 3 and the main beam 21; and a distance is reserved between one end of the connecting structure 5 connected with the main beam 21 and the supporting leg mechanism 3, so that the supporting leg mechanism 3, the main beam 21 and the supporting leg mechanism 3 form a triangular structure, and the structural stability of the portal crane is further improved.

Further, two leg mechanisms 3 of one set of leg mechanisms 3 can be connected through a structure similar to the cross beam 22, so as to further enhance the structural stability of the gantry crane; and the structure for connecting the two leg mechanisms 3 is preferably provided at the upper end of the leg mechanism 3 to avoid limiting the maneuverability of the gantry crane when the structure for connecting the two leg mechanisms 3 is provided below the main beam 21.

Alternatively, as shown in fig. 1 to fig. 3, the trolley structure 42 includes a trolley body 421, a lifting device 423, and a lifting cable 422 connecting the trolley body 421 and the lifting device 423, the trolley body 421 is disposed on the crane mainframe 41 and is adapted to move along the length direction of the crane mainframe 41, and the lifting device 423 is adapted to rotate around the lifting cable 422 and move in the vertical direction through the lifting cable 422.

In this embodiment, the trolley body 421 of the trolley structure 42 is adapted to move along the length direction of the crane cart frame 41, so as to realize the movement of the trolley structure 42 and the movement of the trolley structure 42 after lifting a heavy object. The lifting tool 423 is used for connecting a heavy object so as to ensure that the heavy object cannot be separated from the lifting tool 423 in the lifting process; also, the hoist 423 is adapted to rotate around the hoist rope 422 to adjust the state of the weight during the lifting process. The lifting cable 422 is used for connecting the trolley body 421 and the lifting tool 423, and the weight is lifted or moved down in the vertical direction (i.e. the Z-axis direction in fig. 1) in the lifting process through the extension and contraction of the lifting cable 422.

Further, the trolley structure 42 further includes an unwinding device for extending and shortening the lifting rope 422.

Further, the trolley structure 42 further comprises a rotating device for realizing the rotation of the spreader 423; the rotating device may directly drive the spreader 423 to rotate, or the rotating device may drive the spreader 423 to rotate by driving the lifting cable 422 (e.g., the rotating device directly drives the unwinding device to rotate).

Fig. 7-13, wherein fig. 8(b) to 13(b) are left side views of fig. 8(a) to 13(a), respectively; the gantry crane is used for erecting the beam piece 6 of the prefabricated building in the foundation pit 7 of the prefabricated building (the beam piece 6 comprises a longitudinal beam piece 61 and a transverse beam piece 62), and can be realized by the following modes:

the girder transporting vehicle transports the longitudinal girder pieces 61 to the edge of the foundation pit 7;

the gantry crane moves to the edge of the foundation pit 7, and the large frame 41 of the crown block of the gantry crane moves to the position corresponding to the longitudinal beam piece 61;

the trolley structure 42 moves to the upper part of the longitudinal beam piece 61 along the large frame 41 of the overhead traveling crane, and the longitudinal beam piece 61 is hoisted by a hoisting tool 423;

the trolley structure 42 moves to the middle position of the overhead crane large frame 41, and rotates the longitudinal beam piece 61 until the axis of the longitudinal beam piece 61 is parallel to the longitudinal direction of the foundation pit 7 (i.e. the direction of the X axis in fig. 7);

longitudinally moving the portal crane, transporting the longitudinal beam pieces 61 to corresponding erection positions in the foundation pit 7, and erecting the longitudinal beam pieces 61 on two adjacent pedestals 8 which are positioned at the erection positions and are longitudinally arranged along the foundation pit 7;

after the gantry crane erects the longitudinal beam pieces 61 in the row spanned by the gantry crane (namely the row spanned by the two groups of supporting leg mechanisms 3 of the gantry crane in the foundation pit 7) and at the two ends (namely the longitudinal row passed by the two cantilevers 212 of the gantry crane in the foundation pit 7), the beam transporting vehicle transports the transverse beam pieces 62 to the edge of the foundation pit 7;

the gantry crane moves to the edge of the foundation pit 7, and the large frame 41 of the crown block of the gantry crane moves to a position corresponding to the cross beam piece 62;

the trolley structure 42 moves to the upper part of the beam piece 62 along the crane big frame 41, and the beam piece 62 is lifted by the lifting appliance 423;

the trolley structure 42 moves to the middle position of the big frame 41 of the overhead crane;

longitudinally moving the gantry crane, transporting the beam pieces 62 to corresponding erection positions in the foundation pit 7, and erecting the beam pieces 62 on two adjacent pedestals 8 which are located at the erection positions and arranged along the transverse direction (i.e. the Y-axis direction in fig. 7) of the foundation pit 7, or erecting the beam pieces 62 on two adjacent columns of beam pieces 61 located at the erection positions;

the gantry crane erects the cross beam pieces 62 in the striding row (namely, the striding row of the two groups of supporting leg mechanisms 3 of the gantry crane in the foundation pit 7) and the two ends (namely, the longitudinal row through which the two cantilevers 212 of the gantry crane in the foundation pit 7 pass) in place, and the erection of the beam pieces 6 is completed.

In the above manner, the order of erecting the beam pieces in the foundation pit 7 by the portal crane is to erect the longitudinal beam pieces 61 first and then erect the beam pieces 62, so that on one hand, the longitudinal movement of the portal crane is facilitated, and on the other hand, the beam pieces 62 can be erected on two adjacent longitudinal beam pieces 61 which are located in different rows. Moreover, the beam pieces 62 are erected from far to near (i.e. from the position of the beam carrier far from the edge of the foundation pit 7), so as to avoid the erected beam pieces 62 from obstructing the longitudinal movement of the gantry crane.

Furthermore, when a plurality of erection positions (pedestals 8) are arranged in the train, the gantry crane needs to be changed to another position for erection after the erection of the beam pieces 6 on the cross row and the two ends is completed, so that the longitudinal beam pieces 61 and the transverse beam pieces 62 at the edge of the foundation pit 7 where the beam transporting vehicle is located can be left for final erection, and the gantry crane can conveniently transversely move away from the original position from the edge of the foundation pit 7 where the beam transporting vehicle is located; moreover, in the process that the gantry crane leaves the original position, the gantry crane can move row by row, so that the gantry crane can conveniently complete erection of the longitudinal beam piece 61 and the transverse beam piece 62 in the original position through the trolley mechanism at the cantilever 212.

Further, when the portal crane is used for erecting the beam pieces 6 at different positions, different hoisting mechanisms 4 can be selected; for example, the beam 6 spanned by the gantry crane may be erected by the hoisting mechanism 4 provided on the connecting portion 211, and the beam 6 at both ends of the gantry crane may be erected by the hoisting mechanism 4 provided on the cantilever 212.

As shown in fig. 7 to 13, when an obstacle (e.g., a tower crane) that is easy to block the movement of the gantry crane is disposed in the foundation pit 7 of the prefabricated building, the gantry crane may erect the beam piece 6 in the foundation pit 7, for example, in the following manner:

the gantry crane erects two rows of longitudinal beam pieces 61 adjacent to the barrier in place;

the beam transporting vehicle transports the beam piece 62 to the edge of the foundation pit 7;

the gantry crane moves to the edge of the foundation pit 7 to lift the beam piece 62;

the gantry crane goes to the erection position, when the gantry crane moves to the position near the obstacle, the cart mechanism 1 turns to 90 degrees, and the gantry crane moves transversely to avoid the obstacle;

the cart mechanism 1 turns to 90 degrees, and the portal crane moves longitudinally to cross the obstacle;

the cart mechanism 1 turns to 90 degrees, and the gantry crane moves transversely to the cantilever 212 to return to the row where the obstacle is located;

the cart mechanism 1 turns 90 degrees, the portal crane moves longitudinally to the erection position of the row where the barrier is located, the beam piece 62 is erected on two adjacent pedestals 8 which are located at the erection position and arranged transversely along the foundation pit 7, or the beam piece 62 is erected on two adjacent longitudinal beam pieces 61 located at the erection position;

the portal crane sequentially erects the cross beam pieces 62 which are located in the row of the obstacles and located on one side of the obstacles far away from the girder transporting vehicle, and then sequentially erects the cross beam pieces 62 which are located in the row of the obstacles and located on one side of the obstacles facing the girder transporting vehicle.

In this way, the gantry crane can avoid the obstacle by traversing and longitudinally moving through the steering of the cart mechanism 1, and the erection of the column beam piece 6 where the obstacle is located can be smoothly completed.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to fall within the scope of the present disclosure.

Claims (10)

1. A gantry crane, comprising: the device comprises a cart mechanism (1), a door frame mechanism (2), a support leg mechanism (3) suitable for connecting the cart mechanism (1) and the door frame mechanism (2), and a hoisting mechanism (4) arranged on the door frame mechanism (2); the door frame mechanism (2) comprises a cross beam (22) and main beams (21) arranged at two ends of the cross beam (22), and the main beams (21) are connected with the supporting leg mechanism (3); the hoisting mechanism (4) comprises a large overhead traveling crane frame (41) and a small car structure (42), the large overhead traveling crane frame (41) is arranged on the main beam (21) and is suitable for moving along the length direction of the main beam (21), and the small car structure (42) is arranged on the large overhead traveling crane frame (41) and is suitable for moving along the length direction of the large overhead traveling crane frame (41); and the two ends of the large frame (41) of the overhead travelling crane extend towards the direction far away from the main beam (21).

2. Gantry crane according to claim 1, characterized in that there are two of said main beams (21), two of said main beams (21) being parallel to each other; crossbeam (22) with big frame of overhead traveling crane (41) all is perpendicular to girder (21), just crossbeam (22) sets up two between girder (21), big frame of overhead traveling crane (41) set up the lower extreme of girder (21), dolly structure (42) set up the lower extreme of big frame of overhead traveling crane (41).

3. Gantry crane according to claim 1, characterized in that there are two sets of leg mechanisms (3) and that there is a spacing between the two sets of leg mechanisms (3); the main beam (21) is provided with a connecting part (211) between the two groups of the supporting leg mechanisms (3) and cantilevers (212) at two ends of the connecting part (211); and the cantilever (212) extends away from the leg mechanism (3); the crane large frame (41) is arranged on the connecting part (211) and/or the cantilever (212).

4. Gantry crane according to any of claims 1-3, wherein the lower end of the main beam (21) is provided with a first guide rail (213) arranged along the length of the main beam (21), the crane carriages (41) being adapted to slide along the first guide rail (213); the lower extreme of big frame of overhead traveling crane (41) is equipped with and follows second guide rail (413) that the length direction of big frame of overhead traveling crane (41) set up, dolly structure (42) are suitable for to follow second guide rail (413) slide.

5. The gantry crane according to claim 4, wherein the first guide rail (213) comprises extension parts (2131) protruding from both sides of the lower end of the main beam (21), the crane frame (41) comprises a frame body (411) and a connecting base (412) disposed at the upper end of the frame body (411), a sliding slot (4123) penetrating the connecting base (412) along the length direction of the main beam (21) is disposed on the connecting base (412), and the extension parts (2131) are adapted to be inserted into the sliding slot (4123).

6. The gantry crane according to claim 5, wherein the crane cart frame (41) further comprises a pulley (414) provided on the connecting base (412), and the pulley (414) is located in the sliding groove (4123) and at both upper and lower ends of the extending portion (2131); the pulley (414) is adapted to be in rolling connection with the extension (2131).

7. Gantry crane according to claim 4, wherein the crane metro frame (41) comprises stop structures (415) and the stop structures (415) are arranged at both ends of the second guide rail (413).

8. Gantry crane according to any one of claims 1-3 and 5-7, wherein the cart mechanism (1) comprises a frame (11) and running wheel sets (12) arranged at the lower end of the frame (11), the leg mechanism (3) being arranged at the upper end of the frame (11); the frame (11) and the running wheel set (12) are adapted to rotate about the leg mechanism (3).

9. Gantry crane according to any of claims 1-3 and 5-7, further comprising a connection structure (5), wherein the upper end of the leg mechanism (3) extends away from the main beam (21), wherein one end of the connection structure (5) is connected to the upper end of the leg mechanism (3), and wherein the other end of the connection structure (5) is connected to the main beam (21) and spaced apart from the leg mechanism (3).

10. Gantry crane according to any one of claims 1-3 and 5-7, wherein said trolley structure (42) comprises a trolley body (421), a spreader (423) and a lifting cable (422) connecting said trolley body (421) and said spreader (423), said trolley body (421) being arranged on said trolley frame (41) and being adapted to move along the length of said trolley frame (41), said spreader (423) being adapted to rotate around said lifting cable (422) and to be moved in a vertical direction by means of said lifting cable (422).

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