Derrick mast hoisting device for dismantling and replacing chimney crawling ladder

Abstract

The utility model discloses a derrick mast hoisting device for dismantling and replacing a chimney crawling ladder, which comprises a vertical steel pipe and a plurality of clamping grooves fixed on the steel pipe at equal intervals, a lifting lug is fixed on the top of the steel pipe, and a pulley block is arranged on the lifting lug. The derrick mast hoisting device is vertically fixed by buckling the clamping groove on the connecting piece for connecting the embedded bolt on the outer wall of the chimney and the crawling ladder, and then materials detached in construction are hoisted through the pulley assembly on the lifting lug, so that the problem that the materials are difficult to transport up and down is solved, and meanwhile, the device is simple in structure, low in manufacturing cost, simple and rapid in construction and installation and convenient to use. And the chimney can be repeatedly used, the construction convenience is improved, and the method is used for chimney new construction and chimney reconstruction and reinforcement projects.

Description

Technical Field

[0001] The utility model relates to chimney reconstruction, in particular to a lifting rod hoisting device used for dismantling and replacing chimney ladders. Background Art

[0002] Chimney renovations involve high-altitude work, requiring the removal of ladders and the installation of new ones. Replacing ladders, cages, and platforms is dangerous, and vertical material transport is challenging. Due to years of disrepair, the ladders are highly corrosive, posing significant safety risks to operators during conventional construction, making the work challenging.

[0003] In order to improve the safety, convenience and efficiency of the overall construction, a movable lifting rod device for the removal and replacement of chimney ladders proposed in this application was invented. Utility Model Content

[0004] The utility model aims to provide a lifting device for a lifting rod used for removing and replacing a chimney ladder. The device can be fixed on a connector where pre-buried bolts on the chimney outer wall are connected to the ladder, and can transport materials vertically.

[0005] The technical solution adopted by the utility model is a lifting device for a lifting rod used for dismantling and replacing a chimney ladder, comprising a vertical steel pipe and a plurality of slots fixed on the steel pipe at equal distances; a lifting ear is fixed on the top of the steel pipe, and a pulley block is provided on the lifting ear.

[0006] The utility model is also characterized in that:

[0007] The slot is T-shaped, its vertical rod is fixedly connected to the steel pipe, and the horizontal rod is a U-shaped flat iron.

[0008] The fixing directions of the card slot and the ear are opposite.

[0009] The steel pipe is a round seamless steel pipe.

[0010] The specifications of the round seamless steel pipe are Φ60mm×6mm×6000mm.

[0011] There are 3 card slots.

[0012] The pulley block is a fixed pulley block.

[0013] The beneficial effects of the utility model are:

[0014] This new device consists of only one steel pipe, several slots, one lug, and one pulley block. It is inexpensive, simple, and portable. During construction, the slots simply snap onto the connectors that connect the pre-embedded bolts on the chimney's outer wall to the ladder, securing the chimney. Installation is quick and easy. Lifting materials via the pulley block at the top of the steel pipe solves the problem of difficult material transportation and improves construction convenience. The device can also be reused multiple times. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an overall schematic diagram of the utility model;

[0016] Figure 2 The utility model is a schematic diagram of the installation of the connection portion between the ladder guard cage and the chimney embedded part.

[0017] In the figure: 1. Steel pipe, 2. Slot, 3. Lug, 4. Pulley block, 5. Ladder cage, 6. Ladder, 7. Embedded bolts, 8. Connectors. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Example 1

[0020] like Figure 1 As shown, the lifting device for the lifting rod used for dismantling and replacing the chimney ladder in this embodiment includes a vertical steel pipe 1, a plurality of slots 2 are fixed on the steel pipe 1, a lifting ear 3 is fixed on the top of the steel pipe 1, and a pulley set 4 is provided in the lifting ear 3.

[0021] Example 2

[0022] like Figure 1 As shown, the lifting device for removing and replacing a chimney ladder in this embodiment includes a vertical steel pipe 1. The steel pipe 1 is a circular steel pipe with three equally spaced slots 2 welded axially. The slots 2 are T-shaped. The vertical rods of the T-shaped slots are welded to the surface of the circular steel pipe to fix the slots 2. The transverse rods of the T-shaped slots are used to engage with the connectors pre-embedded in the chimney wall that connect the ladder to the ladder, thereby securing the steel pipe 1 to the ladder or chimney wall. A lifting lug 3 is fixed to the top of the steel pipe 1. The lifting lug 3 is equipped with a pulley block 4. The pulley block 4 cooperates with the winch to lift materials.

[0023] Example 3

[0024] like Figure 1As shown, the present embodiment of the lifting device for removing and replacing a chimney ladder comprises a vertical circular steel tube 1 with three equally spaced slots 2 welded axially to the tube 1. The slots 2 are T-shaped, with the vertical rods of the slots 2 welded to the outer surface of the tube 1. The transverse rods are used to connect and secure with the bolted connectors on the ladder or chimney outer wall. A lug 3 is fixed to the top of the tube 1, within which a pulley block 4 is installed. The pulley block 4 cooperates with a winch to lift materials. The lug 3 is installed in the opposite direction of the slots 2, facilitating the lifting of materials by the pulley block 4 and preventing collision and friction between the materials and the ladder cage or the chimney outer wall.

[0025] Example 4

[0026] like Figure 1 As shown, the lifting rod hoisting device for dismantling and replacing the chimney ladder in this embodiment includes a vertical circular steel pipe 1. The steel pipe 1 is axially welded with three equally spaced slots 2. The slots 2 are T-shaped. The vertical rods of the slots 2 are welded to the outer surface of the steel pipe 1. The transverse rods are inverted U-shaped and are used to connect and fix with the connecting parts with bolts reserved on the outer wall of the ladder or chimney. A lifting ear 3 is fixed on the top of the steel pipe 1. A pulley block 4 is provided in the lifting ear 3. The pulley block 4 cooperates with the winch to lift materials. The installation direction of the lifting ear 3 is opposite to that of the slot 2, which makes it convenient for the pulley block 4 to lift materials and avoid collision and friction between the materials and the ladder cage or the outer wall of the chimney. The lifting ear 3 is short from the topmost slot 2. When the pulley block 4 is lifting materials and bearing the load, the slot 2 can more firmly fix the top of the steel pipe 1.

[0027] Example 5

[0028] like Figure 1 As shown, the lifting rod lifting device for removing and replacing the chimney ladder in this embodiment includes a vertical circular steel pipe 1. The steel pipe 1 is axially welded with three equally spaced slots 2. The slots 2 are T-shaped. The vertical rods of the slots 2 are welded to the outer surface of the steel pipe 1, and the transverse rods are inverted U-shaped and used to connect and fix with the connecting parts with bolts reserved on the outer wall of the ladder or chimney; a lifting ear 3 is fixed on the top of the steel pipe 1, and a fixed pulley group 4 is arranged in the lifting ear 3. The fixed pulley group 4 cooperates with the winch to lift materials. The installation direction of the lifting ear 3 is opposite to that of the slot 2, which makes it convenient for the fixed pulley group 4 to lift materials and avoid collision and friction between the materials and the ladder cage or the outer wall of the chimney. The lifting ear 3 is short from the topmost slot 2. When the fixed pulley group 4 is lifting materials and bearing the load, the slot 2 can more firmly fix the top of the steel pipe 1.

[0029] When using, Figure 2As shown, the steel pipe 1 is a seamless steel pipe with a height of 6000mm and a specification of Φ60mm×6mm×6000mm. The transverse rod of the slot 2 is a U-shaped flat iron. The lifting device of the lifting rod of this embodiment is applied to the construction of a chimney renovation project with a height of 150m. The outer wall of the chimney is pre-embedded with embedded bolts 7 on site. The embedded bolts 7 are used to connect with the ladder 6 to fix the ladder to the outer wall of the chimney. A ladder guard cage 5 is fixed to the ladder 6. The height of each section of the ladder guard cage 5 is 2500mm. The ladder 6 has bolt connectors 8 connected to the embedded bolts 7 on the outer wall of the chimney. Every three bolt connectors 8 can fix a lifting rod with a height of 6000mm. The U-shaped flat iron slot is clipped onto the bolt connector 8 connecting the embedded bolts on the outer wall of the chimney and the ladder. The top pulley of the lifting rod is connected to the wire rope of the 2T winch to operate the lifting device. The dismantling of old components and the installation of new components are carried out by lifting with fixed pulleys and winch wire ropes. Once one set of installation is completed, the lifting device can be lifted and moved to the next set of dismantling and installation construction.

[0030] This utility model applies force by snapping the slot onto the connector where the pre-embedded bolts on the chimney wall connect to the ladder, and then hoists the material through the pulley and winch. This structure is simple, portable, and inexpensive. During construction, the slot is simply snapped onto the connector where the pre-embedded bolts on the chimney wall connect to the ladder, which allows for easy and quick installation. The material is hoisted via the pulley block at the top of the steel pipe, solving the problem of difficult material transportation and improving construction convenience. The device can also be reused multiple times.

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A lifting device for dismantling and replacing chimney ladders, characterized in that: The utility model comprises a vertical steel pipe (1) and a plurality of slots (2) fixed at equal distances on the steel pipe (1); a lifting ear (3) is fixed on the top of the steel pipe (1); and a pulley block (4) is provided on the lifting ear (3).

2. The lifting device for removing and replacing a chimney ladder according to claim 1 is characterized in that: The clamping slot (2) is T-shaped, its vertical rod is fixedly connected to the steel pipe (1), and the transverse rod is a U-shaped flat iron.

3. The lifting device for removing and replacing a chimney ladder according to claim 1 or 2, characterized in that: The fixing directions of the clamping slot (2) and the lifting ear (3) are opposite.

4. The lifting device for removing and replacing a chimney ladder according to claim 1 is characterized in that: The steel pipe (1) is a circular seamless steel pipe.

5. The lifting device for removing and replacing a chimney ladder according to claim 4 is characterized in that: The specification of the circular seamless steel pipe is Φ60mm×6mm×6000mm.

6. The lifting device for removing and replacing a chimney ladder according to claim 1, characterized in that: There are three card slots (2).

7. The lifting device for removing and replacing a chimney ladder according to claim 1, characterized in that: The pulley block (4) is a fixed pulley block.

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