RU2795818C2 - Heavy load lift device - Google Patents

Abstract

FIELD: lifting loads.

SUBSTANCE: invention relates to a device for lifting loads. The method for assembling a heavy lifting device includes the following steps. A mounting structure is provided with a mounting frame and with means for pushing up and down for at least one or part of the mast. Installed inside the frame, during the assembly of the device, or removed from the frame, during the disassembly of the device, a part or a number of parts of the mast below the assembled parts of the mast above the specified part or a number of parts of the mast so as to transfer the device from the disassembled position to the fully assembled position. Provide the device with two masts or their parts. The device contains at least one mast or part of the mast, on which the load can be hung. The device is provided with a ground mounting structure configured to occupy a permanent position during assembly of the device. The structure contains a frame provided with means for pushing up and lowering the mast. The frame is made with the possibility of receiving in the frame or removing a part from it or a number of mast parts. The device contains two masts or parts thereof, and the masts are the main beam and the rear mast of the crane.

EFFECT: reduction of the occupied area of the device with an assembly fixture and elimination of the need to use auxiliary equipment is achieved.

8 cl, 17 dwg

Description

FIELD OF TECHNOLOGY

The present invention relates to a method and apparatus for lifting heavy loads, comprising at least one mast or a part of such a mast from which a load can be suspended.

BACKGROUND OF THE INVENTION

An example of such a method and device is presented in US 6,279764, which describes a lifting device assembled from components or elements, the largest of which has dimensions not exceeding the dimensions of a standard sea container. Accordingly, the lifting device can be easily transported at low cost, and it takes little time to assemble it at the lifting site, regardless of the required lifting height and weight of the load.

However, WO 2016/133389 states that there are disadvantages associated with dividing the lifting device into components or elements with such dimensions that the device can be transported in standard shipping containers. One problem is that it requires a lot of space to assemble on site, as the masts and main beam must be assembled on the supporting surface to full length. Document WO 2016/133389 proposes a solution to this problem by assembling corresponding masts in stages from individual segments or mast parts. The method known from WO 2016/133389 employs a rear mast top skid movable along the rear mast and preferably capable of being locked in place in a plurality of positions along the rear mast. This method involves an upper rear mast section, several intermediate rear mast sections and a lower rear mast section and requires the step of connecting the rear mast portion, comprising at least the upper rear support section and optionally one or more pre-attached intermediate sections, to the upper skid. rear mast. The portion of the rear mast connected to the upper skids of the rear mast is lengthened in stages by attaching additional intermediate sections of the rear mast. During the extension of the rear mast, the upper skid of the rear mast is raised in stages.

BRIEF DESCRIPTION OF THE INVENTION

The invention provides a device with the features of one or more of the appended claims.

In a first aspect of the invention, there is provided a device with an assembly fixture standing on a support surface, configured to take a permanent position during assembly of the device, the assembly fixture comprising a mounting frame configured to raise and lower at least one mast or part of such a mast, wherein the assembly fixture is configured to receive during assembly of the device or remove during disassembly of the device a part of the mast or a number of parts of the mast below the assembled parts of the mast above the specified part of the mast or a number of parts of the mast, to transfer the device from the disassembled position to the fully assembled position.

The ground location and operation of the assembly fixture facilitate the work. At the level of the support surface, it is easier to feed the mast parts to the assembly jig, or remove the mast parts from the assembly jig to move the device between the disassembled position and the fully assembled position. In this way, the feeding or removal of the mast parts from the assembly tool is completely at the level of the supporting surface, and there is no need to use auxiliary ground or any other equipment, such as other cranes, to lift the mast parts to the desired height.

Another advantage is that the assembly jig can be a general purpose device, eg the lifting device can be any type, not necessarily a crane. Examples of the versatility that this provides will be given below.

The fact that the assembly tool includes a mounting frame capable of raising and lowering at least one mast or part of such a mast eliminates the need for ground or any other auxiliary equipment to assemble or disassemble the device. Accordingly, the footprint of the device with the assembly tool is reduced to an absolute minimum.

The way to implement the possibility of lifting and lowering the assembly fixture is clear to a trained specialist. For example, reference may be made to Dutch Patent 1037817, the contents of which are incorporated herein by reference, describing a device for lifting and lowering heavy loads. The weights used in this document can be replaced accordingly by the masts used in this invention.

Another preferred feature of the present invention, contributing to the ease of assembly or disassembly of the device, is that at least one mast is made in the form of a structure of parts of the mast connected and disconnected from each other, in a head-to-tail sequential arrangement.

Another aspect of the invention is that the assembly tool can be moved on a support surface outside the device. This has the advantage that the device can be easily maneuvered over the support surface and moved from one position to another without having to first disassemble the device and then reassemble it in a new location. This provides huge savings in time and money.

As already mentioned, the device according to the present invention is extremely versatile, examples of which are embodiments of the invention in which the device comprises two masts or parts thereof.

In one embodiment of the invention, in which two masts are used, these two masts can be made in the form of portal supports.

In another embodiment of the invention that uses two masts, the two masts can be configured as a main girder and a back mast of the crane.

This crane, implemented according to this invention, has the following advantages.

- The length of the rear mast and the main beam is adjustable in working mode (without load).

- The length of the rear mast and the main beam can be changed without lowering the beam to the level of the supporting surface.

- Pivot points of rear mast and main girder are far apart and have their own sets of sliders or guy lines. Due to this, the load pressure is relatively small.

- In adverse conditions, it is not necessary to lower the main beam to the level of the supporting surface. Masts can be reduced in height to withstand extreme conditions.

- Loads can be lifted using cable jacks or winches.

Hereinafter, the present invention will be further explained with reference to the drawings of two exemplary embodiments of the device according to the present invention, without limiting the scope of the invention according to the appended claims.

DESCRIPTION OF GRAPHICS

On FIG. 1-11 show a series of successive steps in assembling a device according to the present invention, the device being implemented as a crane.

On FIG. 12-17 show a series of successive steps in assembling a device according to the present invention, the device being implemented as a portal.

Throughout the figures, like reference numerals refer to like or like parts.

On FIG. 1 shows the initial position of some of the main elements of the device according to this invention, used to assemble the device from the supporting surface. On FIG. 1 shows a base frame 1 on which is fixed a mounting frame 2, which is an important element of the present invention. Next to the base 1 with mounting frame 2, there is a counterweight 3, which, like the base 1, rests on the supporting surface. Counterweight 3 is used in this example because this example is for a crane assembly. After the discussion of this example is completed, another example will be presented in which there is no counterweight and the device is made in the form of a portal. This will be shown with reference to FIG. 12-17.

Now let's turn to Fig. 2, which shows the next step in the assembly of the device according to the invention, which follows the initial position of FIG. 1 and represents the installation on the mounting frame 2 of the upper parts of the rear mast 5 and the main beam 6, respectively. On FIG. 3 shows these tops of rear mast 5 and main beam 6 raised to a higher level to provide space underneath to receive further parts of rear mast 5 and main beam 6, respectively, to be connected to those already present. This is shown in FIG. 4, where the parts newly installed on the mounting frame 2 are indicated by the number 14'.

For the purpose of illustration, in FIG. 5 shows that the assembled crane is also supplemented by several elements of lifting equipment, such as a counterweight hoisting rope 8, a main beam hoisting rope 9, a hoist 10 and hoist ropes 11.

After installing the new parts 14 on the mounting frame 2', as shown in FIG. 4, these parts need to be connected and assembled with the mast parts above. After that, the rear mast 5 and main beam 6 assembled up to this point can be raised again to make room for receiving further parts of the rear mast 5 and main beam 6, respectively. This process can be continued until the assembly of the rear mast 5 is completed as shown in FIG. 6. After the assembly of the rear mast 5 is completed, only the main beam 6 is further raised and supplemented by the parts of the mast that are still missing at this point, connected and assembled with the lower end of the main beam 6 in the mounting frame 2 in the manner described above, until it will be completed as shown in Fig. 7.

On FIG. 8 shows the tension of the hoisting rope 9 of the main beam between the rear mast 5 and the main beam 6, and in FIG. 9 shows the initial phase of the inclination of the main beam 6. FIG. 10 shows the subsequent inclination of the rear mast 5 and FIG. 11 shows the assembled device in its final working position, ready for use.

It will be clear to those skilled in the art that disassembly of the device can take place in the reverse order, so that it is not necessary to show, with reference to additional figures, how the device is disassembled.

Now let's turn to Fig. 12, which again shows the initial position of the base frame 1, on which the mounting frame 2 is fixed, which, as mentioned above, is an important element of the present invention. Fig. 13 shows the subsequent situation in which the lower parts of the two portal supports or masts 5', 6' are installed in the mounting frame 2. In FIG. 14 the lower parts of the gantry supports 5', 6' are raised to make room below them in the mounting frame 2 for new parts of the masts 14'. On FIG. 15 the newly added mast parts are connected and assembled to form a part of the masts 5', 6' assembled up to this point, and in FIG. 16 shows an intermediate step after a series of completed assembly steps. In this case, each stage includes the lifting of the masts 5', 6' assembled up to this point, the installation and installation of new parts of the masts 14' under the masts 5', 6' assembled up to this point. Finally, in FIG. 17 shows two portal supports 5', 6' at their final height, ready for use.

Although the invention has been discussed above with reference to exemplary embodiments of the apparatus of the present invention, the invention is not limited to these particular embodiments, which may be varied in many ways without departing from the spirit of the invention. Thus, the exemplary embodiments of the invention discussed should not be used to interpret the appended claims strictly in accordance with them. On the contrary, these embodiments are only intended to clarify the wording of the appended claims without limiting the scope of the invention to these exemplary embodiments. Thus, the scope of legal protection of the invention should be construed only in accordance with the appended claims, and possible ambiguities in the wording of the claims should be resolved using these exemplary embodiments of the invention.

Claims (13)

1. A device for lifting heavy loads, containing at least one mast (5, 6; 5', 6') or part of such a mast, on which the load can be suspended, while the device is equipped with a ground mounting structure (1, 2), made with the possibility to occupy a permanent position during the assembly of the device, and the specified mounting structure (1, 2) contains a mounting frame (2) provided with means for pushing up and lowering for at least one mast (5, 6; 5', 6' ) or parts of such a mast, while the mounting frame (2) of the mounting structure (1, 2) is configured to receive in the specified mounting frame (2), during assembly of the specified device, or remove from it, during disassembly of the device, part of the mast or a row of mast parts, below the assembled mast parts above the specified part of the mast or a number of mast parts to transfer the device from a disassembled position to a fully assembled position, characterized in that said device contains two masts (5, 6; 5', 6') or their parts, and these two masts are the main beam (6) and the rear mast (5) of the crane. 2. The device according to claim. 1, in which the main beam (6) and the rear mast (5) of the crane are portal supports (5', 6'). 3. The device according to claim 1 or 2, characterized in that at least one mast (5, 6; 5', 6') is made in the form of a structure of parts of the mast, connected and disconnected from each other according to the principle of sequential arrangement "head to the tail." 4. The device according to any one of paragraphs. 1-3, characterized in that the installation structure (1, 2) is made with the possibility of movement on the ground. 5. A method for assembling a device for lifting heavy loads, containing at least one mast, including the step of installing the mounting structure (1, 2) on the ground, wherein: - provide a mounting structure (1, 2) with means for pushing up and lowering for at least one mast (5, 6; 5', 6') or part of such a mast; - provide a mounting structure (1, 2) with a mounting frame (2); - installed inside the mounting frame (2) of the mounting structure (1, 2), during the assembly of the device, or removed from the mounting frame (2) of the mounting structure (1, 2), during disassembly of the device, a part of the mast or a number of mast parts below the assembled parts of the mast above the specified part of the mast or a number of parts of the mast so as to transfer the device from the disassembled position to the fully assembled position; characterized in that it includes providing said device with two masts (5, 6; 5', 6') or parts thereof, said two masts being made in the form of a main beam (6) and a rear mast (5) of a crane. 6. The method according to claim 5, in which the main beam (6) and the rear mast (5) of the crane are portal supports (5', 6'). 7. The method according to claim 5 or 6, characterized in that at least one mast (5, 6; 5', 6') is made in the form of a structure of parts of the mast, connected and disconnected from each other according to the principle of sequential arrangement "head to the tail." 8. The method according to any one of paragraphs. 5-7, characterized in that the mounting structure (1, 2) is made with the possibility of movement on the ground.

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