A multi-head rotating overhead crane with "self-stabilizing" characteristics

Abstract

The present invention is a multi-head rotating overhead crane with multiple pulley support assemblies, which can simultaneously pull and hoist multiple devices and can switch between each device through rotation; it includes a column, a driving device, a traction wire rope, and at least two sets of pulleys and pulley support assemblies; the column is vertically arranged, the two sets of pulleys and pulley support assemblies are arranged on the side of the column, the traction wire rope is respectively inserted into each set of pulleys and pulley support assemblies, and a driving device is arranged at the bottom of the column, and the column is driven by the driving device to rotate so that the two sets of pulleys and pulley support assemblies are respectively put into use. This overhead crane can pull and hoist multiple devices at the same time, and can save downtime and ensure the coaxiality of the connected drill rod when repetitive operations such as connecting drill rods are required. The weight of the pulley, pulley assembly, and equipment is transferred to the axis center line of the vertical axis through the traction wire rope, so as to realize the "self-stabilizing" feature of the rotating overhead crane, so that it is particularly suitable for use with super-high masts.

Description

Technical Field

[0001] The invention relates to the field of engineering machinery, in particular to a multi-head rotating overhead crane with a plurality of pulley bracket assemblies, capable of towing and hoisting a plurality of equipments at the same time and capable of switching between the various equipments through rotation. Background Art

[0002] "Crane" is widely used in drilling rigs or other engineering machinery with masts. Usually, the crane only provides a set of pulleys and supporting brackets, and after being matched with a winch, it provides traction and hoisting functions for a device (such as a drill rod). With the continuous development of industrial level, the length of a single drill rod often cannot meet the current drilling depth requirements. For this reason, it is necessary to connect the drill rod. When connecting the drill rod, the traditional crane that only provides a set of pulleys and brackets has to repeatedly hoist the drill rod, which slows down the operation efficiency. Summary of the invention

[0003] The purpose of the present invention is to overcome the above-mentioned defects and to provide a "self-stabilizing" multi-head rotating overhead crane that can tow and hoist multiple devices at the same time and has a better force-bearing structure, high overall rigidity and light weight.

[0004] In order to achieve the above object, the present invention is achieved as follows:

[0005] A multi-head rotating overhead crane with a "self-stabilizing" feature comprises a column, a driving device, a slewing bearing, a guide rail assembly, a traction wire rope, a road wheel pulled by the traction wire rope, and at least two sets of pulleys and pulley bracket assemblies and a secondary guide rail assembly corresponding to the pulley assembly; the column is vertically arranged, two or more sets of pulleys and pulley bracket assemblies are arranged on the side of the column, the number of traction wire ropes matches the number of pulleys and pulley bracket assemblies and is respectively passed through each set of pulleys and pulley bracket assemblies, and a driving wire rope is arranged at the bottom of the column through a slewing bearing. A driving device is provided to realize the rotatable function of anti-overturning. The rotation of the column is driven by the driving device so that the two sets of pulleys and pulley bracket assemblies are respectively put into operation so that each set of auxiliary guide rails corresponds to a set of pulley hanging points and docks with the main guide rails; wherein, the two sets of pulleys and pulley bracket assemblies adopt multiple sets of connecting rod mechanisms, including a front supporting structure, a rear supporting structure and a pull rod. Under the action of the traction wire rope, the load it carries and its own gravity are transmitted to the axis center of the vertical axis, so that the pulley and pulley bracket assembly itself does not bear bending moment and realizes a two-force balance state.

[0006] The multi-head rotating overhead crane proposed in the present invention is provided with at least two sets of pulleys and pulley bracket assemblies, so that multiple devices can be towed and hoisted at the same time. In this way, when repetitive operations such as connecting drill rods are required, downtime can be saved and the coaxiality of the connected drill rods can be ensured.

[0007] Furthermore, on the basis of the above, the weight of the pulley, the pulley assembly and the lifting equipment is transferred to the axis center line of the vertical axis through the traction wire rope, thus realizing the "self-stabilizing" feature of the rotating overhead crane, that is, it does not bear bending moment itself and maintains the balance of two forces between the traction wire rope and the lifting equipment; thus, the overhead crane is particularly suitable for use with an ultra-high mast.

[0008] In the above structure, a load-bearing wheel is hung on the traction wire rope, and one end of the traction wire rope passes through the pulleys on the front support structure and the rear triangular support structure and is pulled by the winch and the fixed end of the mast.

[0009] In the present invention, a series of designs are made to the pulley and the pulley bracket assembly, such as introducing the concept of lightweight, increasing structural strength, and improving the design concept of traction and hoisting accuracy:

[0010] a. The pulley bracket assembly in each group of pulleys and pulley bracket assemblies includes a cantilever rod, a pull rod, a support rod and a connecting rod, wherein the support rod and the connecting rod are connected at one end to form a rear triangular support structure of the pulley bracket assembly, and the cantilever rod serves as the front support structure of the pulley bracket assembly. A pull rod is arranged between the cantilever rod and the support rod and the connecting rod, and the pull rod is connected to the support rod and the connecting rod with the same end; pulleys are arranged on the front support structure and the rear triangular support structure, and the front support structure and the rear triangular support structure are located in the same plane and are respectively connected to the side walls of the pillars through connecting seats.

[0011] b. The absolute height of the pulley provided on the front support structure is higher than the absolute height of the pulley provided on the rear triangle support structure.

[0012] c. The pulley support assembly in the pulley and pulley support assembly has a lightweight hollow structure, for example, a rod is formed by welding steel plates and a reinforcing rib plate is provided to achieve a lightweight hollow structure.

[0013] d. In order to improve the accuracy of traction and lifting, a guide rail is added. The guide rail is arranged parallel to the axis of the column and fixed on the side wall of the column. The guide rail and the pulley and pulley bracket assembly are located in the same plane.

[0014] e. In order to ensure uniform force, the pulley and pulley bracket assembly should be set along the horizontal plane of the column to equally divide the column.

[0015] f. The support rods, connecting rods and pull rods that form the rear triangular support structure of the pulley bracket assembly are connected by a rear intermediate connecting plate. The rear intermediate connecting plate is set as the same end point of the support rods, connecting rods and pull rods, and the pulley is also set on the rear intermediate connecting plate.

[0016] g. The cantilever rod and the pull rod as the front supporting structure are connected by a front middle connecting plate. The front middle connecting plate is set as the same end point between the cantilever rod and the pull rod, and the pulley is also set on the front middle connecting plate.

[0017] It can be seen from the above that the present invention not only proposes a multi-head rotating overhead crane that is different from the traditional overhead crane with a single lifting function, but also optimizes the pulley and pulley bracket assembly on the overhead crane. Therefore, the overhead crane proposed by the present invention surpasses the traditional overhead crane in functionality, reliability and practicality. It is a brand-new overhead crane structure, which provides a solution for fast, continuous and high-precision operations for engineering machinery that relies on masts to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an axonometric view of the three-head overhead crane shown in this embodiment.

[0019] Figure 2 It is a left side view of the three-head overhead crane shown in this embodiment.

[0020] Figure 3 It is a right side view of the three-head overhead crane shown in this embodiment. DETAILED DESCRIPTION

[0021] The present invention is further described below by means of specific examples.

[0022] like Figure 1 to Figure 3 As shown, a three-head rotating overhead crane with a "self-stabilizing" feature comprises a column 1, a driving device 2, a traction wire rope 3, and three sets of pulleys and pulley bracket assemblies 4 that equally divide the column in a horizontal plane; the column 1 is vertically arranged, the pulleys and pulley bracket assemblies 4 are arranged on the side of the column 1, the number of traction wire ropes 3 matches the number of pulleys and pulley bracket assemblies 4 and are respectively passed through each set of pulleys and pulley bracket assemblies 4, and are connected to the driving device 2 through a bearing at the bottom of the column 1, and the column 1 is driven to rotate by the driving device 2 so that the pulleys and pulley bracket assemblies 4 are respectively put into use; wherein, one end of the traction wire rope 3 passes through the pulley and pulley bracket assemblies 4 and is anchored and fixed on a mast or a tower lifting mechanism (not shown in the figure), and the pulley and pulley bracket assemblies 4, under the action of the traction wire rope 3, transmit the load and its own gravity to the axis center of the vertical axis, so that the pulley and pulley bracket assemblies 4 themselves do not bear bending moment and achieve a two-force balance state, that is, the "self-stabilizing" feature is achieved.

[0023] In the above structure, the specific structure of the pulley bracket assembly is as follows:

[0024] The pulley bracket assembly includes a cantilever rod 41, a pull rod 42, a support rod 43 and a connecting rod 44. The support rod 43 and the connecting rod 44 are connected at one end to form a rear triangular support structure of the pulley bracket assembly. The cantilever rod 41 serves as the front support structure of the pulley bracket assembly. A pull rod 42 is arranged between the cantilever rod 41 and the support rod 43 and the connecting rod 44. The pull rod 42 is connected to the support rod 43 and the connecting rod 44 using the same end; pulleys are arranged on the front support structure and the rear triangular support structure, and the front support structure and the rear triangular support structure are located in the same plane and are respectively connected to the side walls of the pillars through connecting seats; wherein, the absolute height of the pulley arranged on the front support structure is higher than the absolute height of the pulley arranged on the rear triangular support structure.

[0025] The pulley support assembly in the above pulley and pulley support assembly is formed by welding steel plates to form each rod and arranging a reinforcing rib plate on the rod body to achieve a lightweight hollow structure.

[0026] In actual use, in order to improve the accuracy of traction and lifting, a guide rail is added below the front support structure. The guide rail is arranged parallel to the axis of the column and fixed on the side wall of the column. The guide rail and the pulley and pulley bracket assembly are located in the same plane.

[0027] In the above structure, in order to ensure the structural strength and increase the force-bearing performance of the pulley bracket assembly, the support rods, connecting rods and pull rods of the rear triangular support structure of the pulley bracket assembly are connected by a rear intermediate connecting plate, and the rear intermediate connecting plate is set as the same end point of the support rods, connecting rods and pull rods, and the pulley is also set on the rear intermediate connecting plate; the cantilever rod and the pull rod of the front support structure are connected by a front intermediate connecting plate, and the front intermediate connecting plate is set as the same end point between the cantilever rod and the pull rod, and the pulley is also set on the front intermediate connecting plate.

[0028] The above embodiments have proved once again that the present invention not only proposes a multi-head rotating overhead crane that is different from the traditional overhead crane with a single lifting function, but also optimizes the pulley and pulley bracket assembly on the overhead crane. Therefore, the overhead crane proposed by the present invention surpasses the traditional overhead crane in functionality, reliability and practicality. It is a brand-new overhead crane structure, which provides a solution for fast, continuous and high-precision operations for engineering machinery that relies on masts to operate.

Claims

1. A multi-head rotating overhead crane with a "self-stabilizing" feature, comprising a column, a driving device, a slewing bearing, a guide rail assembly, a traction wire rope, a road wheel pulled by the traction wire rope, and at least two sets of pulleys and pulley bracket assemblies and auxiliary guide rail assemblies corresponding to the pulley assembly; the column is vertically arranged, two or more sets of pulleys and pulley bracket assemblies are arranged on the side of the column, the number of traction wire ropes matches the number of pulleys and pulley bracket assemblies and are respectively passed through each set of pulleys and pulley bracket assemblies, a driving device is arranged at the bottom of the column through a slewing bearing to realize an anti-overturning rotatable function, and the rotation of the column is driven by the driving device so that the two sets of pulleys and pulley bracket assemblies are respectively put into operation so that each set of auxiliary guide rails corresponds to a set of pulley suspension points and docks with the main guide rail; wherein, The two sets of pulleys and pulley bracket assemblies adopt multiple groups of connecting rod mechanisms, including a front support structure, a rear support structure and a pull rod. Under the action of the traction wire rope, the load it carries and its own gravity are transmitted to the axis center of the vertical axis, so that the pulley and pulley bracket assembly itself does not bear bending moment and achieves a two-force balance state; its characteristics are: the pulley bracket assembly in each set of pulleys and pulley bracket assemblies includes a cantilever rod, a pull rod, a support rod and a connecting rod, wherein the support rod and the connecting rod are connected at one end to form a rear triangular support structure of the pulley bracket assembly, the cantilever rod serves as the front support structure of the pulley bracket assembly, and a pull rod is arranged between the cantilever rod and the support rod and the connecting rod, and the pull rod and the support rod and the connecting rod adopt the same end The pulleys are connected by a rear intermediate connecting plate; the front supporting structure and the rear triangular supporting structure are both provided with pulleys, and the front supporting structure and the rear triangular supporting structure are located in the same plane and are respectively connected to the side walls of the pillars through connecting seats; the support rods, connecting rods and pull rods of the rear triangular supporting structure forming the pulley bracket assembly are connected by a rear intermediate connecting plate, and the rear intermediate connecting plate is provided as the same end point of the support rods, connecting rods and pull rods, and the pulleys are also provided on the rear intermediate connecting plate; the cantilever rod and the pull rod of the front supporting structure are connected by a front intermediate connecting plate, and the front intermediate connecting plate is provided as the same end point between the cantilever rod and the pull rod, and the pulleys are also provided on the front intermediate connecting plate.

2. The multi-head rotating overhead crane with the "self-stabilizing" feature according to claim 1 is characterized in that: The absolute height of the pulley arranged on the front supporting structure is higher than the absolute height of the pulley arranged on the rear triangular supporting structure.

3. The multi-head rotating overhead crane with the "self-stabilizing" feature according to claim 1 is characterized in that: The pulley support assembly in the pulley and pulley support assembly has a lightweight hollow structure.

4. The multi-head rotating overhead crane with "self-stabilizing" feature according to claim 1 is characterized in that: It also includes a guide rail, which is arranged parallel to the axis of the column and fixed on the side wall of the column. The guide rail and the pulley and pulley bracket assembly are located in the same plane.

5. The multi-head rotating overhead crane with the "self-stabilizing" feature according to claim 1 is characterized in that: The pulley and pulley bracket assembly are distributed along the horizontal plane direction of the column according to the rotation radius of the hanging point.

6. The multi-head rotating overhead crane with "self-stabilizing" feature according to claim 1 is characterized in that: A load-bearing wheel is hung on the traction wire rope, and one end of the traction wire rope passes through pulleys on the front support structure and the rear triangular support structure and is pulled by a winch and a fixed end of the mast.

Images