An explosion-proof electric hoist

Abstract

The utility model discloses an explosion-proof electric hoist relating to the technical field of cranes, comprising a shell, a driving mechanism, a steel wire rope and a drum. One end of the steel wire rope is provided with a rope head whose outer diameter is larger than that of the steel wire rope, and the drum is provided with a rope clamping mechanism for clamping and limiting the rope head so as to realize a quick-release connection between the steel wire rope and the drum. The utility model can not only stably and effectively limit and fix one end of the steel wire rope to ensure a firm and stable connection between the steel wire rope and the drum, but also greatly facilitate the subsequent quick-release installation of the steel wire rope, thereby greatly improving the rope changing efficiency of the electric hoist.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to an explosion-proof electric hoist. Background Art

[0002] At present, the design and manufacturing technology of LNG tank top cranes is in a monopoly position in a few countries represented by Europe and the United States. The tank top cranes used in domestic receiving stations are all imported. The internal temperature of LNG cryogenic tanks is as low as more than 100 degrees below zero, and what is stored is liquefied explosive gas. This results in the inability to use conventional lifting equipment for internal parts during maintenance. In order to realize the lifting operation of LNG storage tanks, the drum of existing tank top cranes often needs to be equipped with two types of wire ropes, one is a low-temperature resistant rope, which is specially used to lift the low-temperature parts in the tank, and the other is a normal temperature rope, which is used to lift other normal temperature parts outside the tank. During the lifting operation, the wire rope is replaced and used according to actual needs.

[0003] However, the connection and fixation between the wire rope and the drum in the existing electric hoists mostly adopt a rope pressure plate structure. In order to meet the replacement of the wire rope, the rope pressure plate needs to be frequently disassembled, which not only affects the connection and fixation effect of the wire rope and poses a great safety hazard, but also takes a long time for each disassembly, which seriously affects the lifting efficiency. Utility Model Content

[0004] In order to overcome the deficiencies in the background technology, the utility model discloses an explosion-proof electric hoist, which can not only stably and effectively limit and fix one end of the wire rope to ensure a firm and stable connection between the wire rope and the drum, but also greatly facilitate the subsequent quick-disassembly installation of the wire rope, thereby greatly improving the rope changing efficiency of the electric hoist.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An explosion-proof electric hoist comprises a shell, a driving mechanism, a wire rope and a drum. A drum for winding and lowering the wire rope is rotatably installed in the shell. A driving mechanism for driving the drum to rotate is provided on one side of the shell. A rope head with an outer diameter larger than that of the wire rope is provided at one end of the wire rope. A rope clamping mechanism for blocking and limiting the rope head to achieve a quick-release connection between the wire rope and the drum is installed on the drum. The rope clamping mechanism comprises a mounting block. A through hole is provided on one side of the mounting block, which penetrates the mounting block and is used for the wire rope to pass through.

[0007] Furthermore, the inner diameter of the through opening is larger than the outer diameter of the steel wire rope and smaller than the outer diameter of the rope end.

[0008] Furthermore, the inner diameter of the through hole is not less than the outer diameter of the rope head, and a reducing ring coaxially arranged with the through hole is provided at one end of the inner cavity of the through hole. The inner diameter of the reducing ring is not less than the outer diameter of the wire rope and is smaller than the outer diameter of the rope head.

[0009] Furthermore, an opening is provided on the upper surface of the mounting block, which is arranged axially along the mounting block and is connected to the inner cavity of the through port and the inner ring of the reducing ring. Both ends of the opening are open structures, and the width of the opening is not less than the outer diameter of the wire rope and less than the outer diameter of the rope head.

[0010] Compared with the prior art, the utility model has the following beneficial effects: by providing a mounting block and a through hole on the mounting block, when the wire rope passes through the through hole, the rope head at the end can be blocked and limited, so that the wire rope and the drum can be detachably connected;

[0011] By setting a reducing ring, when the rope head is inserted into the through hole, the reducing ring can block and limit the rope head, which not only realizes the detachable connection between the wire rope and the drum, but also greatly improves the stability of the wire rope connection;

[0012] By setting the opening, the wire rope can be quickly disassembled and assembled, which greatly improves the efficiency of replacing and installing the wire rope;

[0013] The utility model can not only stably and effectively limit and fix one end of the wire rope to ensure a firm and stable connection between the wire rope and the drum, but also greatly facilitate the subsequent quick-disassembly installation of the wire rope, thereby greatly improving the rope changing efficiency of the electric hoist. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the steel wire rope structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the reel structure of the utility model;

[0017] Figure 4 It is a schematic diagram of the rope clamping mechanism structure of the utility model.

[0018] In the figure: 1. housing; 2. driving mechanism; 3. wire rope; 4. drum; 5. rope head; 6. rope clamping mechanism; 7. reducing ring; 8. opening; 9. through port; 10. mounting block. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present invention and are for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction.

[0020] Please refer to the instruction manual Figure 1-4, the utility model provides a technical solution:

[0021] Embodiment 1, an explosion-proof electric hoist, comprising a housing 1, a driving mechanism 2, a wire rope 3 and a drum 4, wherein a drum 4 for winding and lowering the wire rope 3 is rotatably installed in the housing 1, a driving mechanism 2 for driving the drum 4 to rotate is provided on one side of the housing 1, the driving mechanism 2 comprises a motor, a reducer and a brake, etc., a rope head 5 having an outer diameter greater than that of the wire rope 3 is provided at one end of the wire rope 3, a rope clamping mechanism 6 for clamping and limiting the rope head 5 to realize a quick-release connection between the wire rope 3 and the drum 4 is installed on the drum 4, the rope clamping mechanism 6 comprises a mounting block 10, a through opening 9 penetrating the mounting block 10 and for the wire rope 3 to pass through is provided on one side of the mounting block 10, the inner diameter of the through opening 9 is greater than the outer diameter of the wire rope 3 and smaller than the outer diameter of the rope head 5;

[0022] When connecting the wire rope 3 to the drum 4, the end of the wire rope 3 without the rope head 5 is inserted through one end of the through opening 9 until the rope head 5 at the other end of the wire rope 3 hits and blocks the end of the through opening 9, and then the wire rope 3 is wound on the drum 4. When the wire rope 3 needs to be replaced, the wire rope 3 is completely lowered from the drum 4, and the wire rope 3 can be pulled out of the through opening 9 of the mounting block 10 by pulling the rope head 5, and then the new wire rope 3 can be installed.

[0023] Embodiment 2: If the rope end 5 is always located outside one end of the through-hole 9, the exposed rope end 5 is not only prone to friction damage, but also unsightly. In order to ensure effective interference and limiting between the rope end 5 and the mounting block 10, the inner diameter of the through-hole 9 is not less than the outer diameter of the rope end 5, and a reducing ring 7 coaxially arranged with the through-hole 9 is provided at one end of the inner cavity of the through-hole 9. The inner diameter of the reducing ring 7 is not less than the outer diameter of the wire rope 3 and is smaller than the outer diameter of the rope end 5.

[0024] Embodiment three, when disassembling and installing the wire rope 3, although the cooperation between the mounting block 10 and the rope head 5 is more convenient than the traditional rope pressing plate fixing method, it is still necessary to pull and move the wire rope 3 as a whole. In order to further improve the disassembly and assembly efficiency of the wire rope 3, the upper surface of the mounting block 10 is provided with an opening 8 which is arranged along the axial direction of the mounting block 10 and is connected with the inner cavity of the through port 9 and the inner ring of the reducing ring 7. Both ends of the opening 8 are open structures. The width of the opening 8 is not less than the outer diameter of the wire rope 3 and is smaller than the outer diameter of the rope head 5. When disassembling the wire rope 3, it is only necessary to pull the rope head 5 out of the mounting block 10, and then use the opening 8 to conveniently and efficiently remove the wire rope 3 from the through port 9 in the mounting block 10. Otherwise, the wire rope 3 can be quickly installed.

[0025] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the above-mentioned embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure marks in the claims should not be regarded as limiting the content of the claims involved.

Claims

1. An explosion-proof electric hoist, comprising a housing (1), a driving mechanism (2), a steel wire rope (3) and a drum (4), wherein a drum (4) for winding and lowering the steel wire rope (3) is rotatably mounted in the housing (1), and a driving mechanism (2) for driving the drum (4) to rotate is provided on one side of the housing (1), characterized in that: One end of the steel wire rope (3) is provided with a rope head (5) having an outer diameter greater than the outer diameter of the steel wire rope (3); a rope clamping mechanism (6) for clamping and limiting the rope head (5) so as to realize a quick-release connection between the steel wire rope (3) and the drum (4) is installed on the drum (4); the rope clamping mechanism (6) comprises a mounting block (10); one side of the mounting block (10) is provided with a through opening (9) penetrating the mounting block (10) and used for the steel wire rope (3) to pass through.

2. The explosion-proof electric hoist according to claim 1, characterized in that: The inner diameter of the through opening (9) is larger than the outer diameter of the steel wire rope (3) and smaller than the outer diameter of the rope head (5).

3. The explosion-proof electric hoist according to claim 1, characterized in that: The inner diameter of the through opening (9) is not less than the outer diameter of the rope head (5); a reducing ring (7) coaxially arranged with the through opening (9) is provided at one end of the inner cavity of the through opening (9); the inner diameter of the reducing ring (7) is not less than the outer diameter of the steel wire rope (3) and is smaller than the outer diameter of the rope head (5).

4. The explosion-proof electric hoist according to claim 3, characterized in that: The upper surface of the mounting block (10) is provided with an opening (8) arranged along the axial direction of the mounting block (10) and intersecting the inner cavity of the through hole (9) and the inner ring of the reducing ring (7). Both ends of the opening (8) are open structures. The width of the opening (8) is not less than the outer diameter of the steel wire rope (3) and is less than the outer diameter of the rope head (5).

Images