Elevator hoisting rope

Abstract

The utility model relates to an elevator hoist rope, which belongs to the field of elevator equipment and comprises a plurality of carbon fiber strips and a polyurethane layer. The face, making contact with the traction wheel, of the polyurethane layer is the lower surface of the polyurethane layer. A plurality of placing grooves are downwards formed in the upper surface of the polyurethane layer; the carbon fiber strips and the placing grooves are arranged in a one-to-one correspondence mode, the carbon fiber strips are embedded in the corresponding placing grooves, and the polyurethane layer does not wrap the upper surfaces of the carbon fiber strips. The carbon fiber strips of the traction rope are convenient to replace.

Description

Technical Field

[0001] The utility model belongs to elevator equipment, in particular to an elevator traction rope. Background Art

[0002] The elevator traction assembly includes a traction machine, brake, traction sheave, reducer, traction rope, guide sheave, car and counterweight. The traction machine provides power to rotate the traction sheave, and the friction between the traction sheave and the traction rope can generate traction and pull the car; the counterweight is used to balance the weight of the car and reduce the load on the traction machine.

[0003] At present, the traction rope is mainly made of steel wire rope. The resistance when the traction machine tows the car mainly comes from two aspects: on the one hand, the weight of the car itself, and on the other hand, the weight of the steel wire rope.

[0004] For low-rise and medium-rise buildings, due to the low height of the building, the length of the wire rope is short, and the overall weight of the wire rope is also light, about several thousand kilograms, and the resistance of the wire rope to the traction machine is not obvious. However, for high-rise buildings, due to the high height of the building, the length of the wire rope is long, so the weight of the wire rope can reach dozens of tons.

[0005] For tens of tons of wire rope, in order to ensure the safety of operation, the performance requirements of the traction machine are also very strict. In today's life, with the development of science and technology, especially for high-rise buildings, the running speed of elevators is getting faster and faster. Traditional traction machines cannot meet the running speed requirements of elevators under the premise of ensuring safety. Therefore, in order to meet the needs of scientific and technological development, it is necessary to reduce the weight of the traction rope, while ensuring the strength of the traction rope, and to meet the running speed requirements of the elevator as much as possible without increasing the performance requirements of the traction machine.

[0006] Replacing the steel wire rope with a carbon fiber belt can meet the above elevator operation requirements. This is because replacing the steel wire rope with a carbon fiber belt not only reduces the weight of the traction rope, but also ensures that the strength of the traction rope is not reduced, greatly alleviating the pressure on the traction machine.

[0007] But, see Figure 2 The end face of the current carbon fiber belt is rectangular, and each carbon fiber belt is composed of multiple carbon fiber strips and a polyurethane layer wrapped around the outer side of the multiple carbon fiber strips. The polyurethane layer can protect the carbon fiber strips and prevent the carbon fiber strips from being damaged by friction with the traction wheel.

[0008] However, the carbon fiber strips are not completely indestructible and will be damaged over time. If the carbon fiber strips are damaged, it is inconvenient to replace the carbon fiber strips because the polyurethane layer wraps around the carbon fiber strips. Utility Model Content

[0009] The utility model is mainly intended to design an elevator traction rope capable of conveniently replacing carbon fiber strips.

[0010] The elevator traction rope of the utility model comprises a plurality of carbon fiber strips and a polyurethane layer; the surface of the polyurethane layer in contact with the traction wheel is the lower surface of the polyurethane layer;

[0011] A plurality of placement grooves are opened downward on the upper surface of the polyurethane layer; each carbon fiber strip is arranged correspondingly to each placement groove, each carbon fiber strip is embedded in the corresponding placement groove, and the polyurethane layer does not wrap the upper surface of the carbon fiber strip.

[0012] The polyurethane layer is designed to have a structure that does not wrap the carbon fiber strips, so that the carbon fiber strips can be separated from the polyester-ammonia layer from the side where the polyurethane layer does not wrap the carbon fiber strips. When one of the carbon fiber strips is damaged, it can be easily replaced.

[0013] Furthermore, the carbon fiber strip comprises:

[0014] The main body is adapted to the shape of the placement groove; the main body can be embedded in the placement groove by relying on the elastic force of the polyester-ammonia layer deformation;

[0015] A plurality of protrusions are integrally arranged with the left and right side walls of the main body and can be embedded in the side walls of the placement groove.

[0016] The designed main body is embedded in the placement groove, which can initially maintain the connection firmness between the carbon fiber strip and the placement groove; and then the raised part is embedded in the placement groove to further ensure the connection firmness between the carbon fiber strip and the placement groove. Both the main body and the raised part can ensure that the carbon fiber strip is not easily separated from the polyurethane layer.

[0017] Furthermore, the carbon fiber strip also includes:

[0018] The taking part is used for facilitating the separation of the carbon fiber strip from the polyurethane layer. The taking part is integrally arranged on the upper surface of the main body; the upper end of the taking part protrudes from the upper end of the placement groove.

[0019] The taking part is designed to protrude from the upper surface of the placement groove, so that an operator can use a tool to cooperate with the taking part to take the carbon fiber strip out of the placement groove.

[0020] Furthermore, the upper end of the taking portion is lower than the upper surface of the polyurethane layer.

[0021] This is to ensure that the polyurethane layer can protect the left and right side walls of the carbon fiber strip and avoid wear between the traction wheel and the side of the carbon fiber strip.

[0022] Furthermore, the edges of the holding portion and the polyurethane layer are both rounded.

[0023] It makes the use of the towing rope smoother and has no sharp edges. Beneficial Effects

[0024] 1. The polyurethane layer does not completely wrap the carbon fiber strip, and the upper side of the carbon fiber strip is exposed, which facilitates the separation of the carbon fiber strip from the polyurethane layer.

[0025] 2. A raised portion is provided to increase the connection firmness between the carbon fiber strip and the placement groove.

[0026] 3. A taking part is provided to facilitate the use of a machine to take out the carbon fiber strips from the placement slot. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is an end cross-sectional view of the traction rope in this scheme;

[0028] Figure 2 It is an end cross-sectional view of a traction rope in the prior art.

[0029] 1. Carbon fiber strip; 11. Main body; 12. Raised portion; 13. Pick-up portion; 2. Polyurethane layer; 3. Placement groove. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] See Figure 1 , an elevator traction rope comprises a plurality of carbon fiber strips 1 and a polyurethane layer 2.

[0032] In this embodiment, the end surface of the polyurethane layer 2 is shaped as a rectangle; the surface of the polyurethane layer 2 in contact with the traction wheel is the lower surface of the polyurethane layer 2; the length direction of the polyurethane layer 2 is Figure 1 In the direction perpendicular to the paper.

[0033] The upper surface of the polyurethane layer 2 is provided with a plurality of placement grooves 3 extending downwardly. The placement grooves 3 are arranged correspondingly to the carbon fiber strips 1 one by one.

[0034] Viewed from the end face of the traction rope, the carbon fiber strip 1 comprises:

[0035] Main body 11; in this embodiment, the shape of the main body 11 is adapted to the shape of the placement groove 3, and the main body 11 is embedded in the placement groove 3. Because the polyurethane layer 2 itself has elasticity and can undergo elastic deformation to a certain extent, after the main body 11 of the carbon fiber strip 1 is embedded in the placement groove 3, the polyurethane layer 2 will tightly clamp the main body 11 due to the elastic deformation force of the polyurethane layer 2. Under the external force of non-mechanical tools, it is ensured that the main body 11 cannot be separated from the placement groove 3.

[0036] Multiple protrusions 12 are formed integrally with the main body 11. When viewed along the end surface of the traction rope, the protrusions 12 are arranged on the left and right sides of the main body 11. The multiple protrusions 12 can be embedded in the side walls of the placement groove 3. This allows a greater friction between the carbon fiber strip 1 and the polyurethane layer 2, and further ensures that the carbon fiber strip 1 cannot be separated from the placement groove 3 under the action of an external force other than a mechanical tool.

[0037] The picking portion 13 is formed integrally with the main body 11. When viewed along the end surface of the traction rope, the picking portion 13 is arranged on the upper surface of the main body 11. The upper end of the picking portion 13 protrudes from the upper end of the placement groove 3, and the upper end of the picking portion 13 is lower than the upper surface of the polyurethane layer 2. The left and right width of the upper end of the picking portion 13 is greater than the left and right width of the lower end of the picking portion 13, and a groove is formed between the lower end of the picking portion 13 and the upper end of the main body 11. The mechanical tool is stuck in the groove position, and cooperates with the upper end of the picking portion 13 to form a position for the mechanical tool to grasp, so that the mechanical tool can grasp the picking portion 13 easily.

[0038] The pick-up portion 13 is used to facilitate the operator to use a machine to separate the entire carbon fiber strip 1 from the polyurethane layer 2. The edges of the pick-up portion 13 and the polyurethane layer 2 are both rounded, making the use of the traction rope smoother and without sharp edges.

[0039] Installation and removal process of carbon fiber strip 1 in this elevator traction rope:

[0040] Installation process: Use engineering machinery to stretch the polyurethane layer 2 left and right, so that the placement groove 3 on the polyurethane layer 2 is deformed in the left and right direction, and the placement groove 3 is expanded in the left and right direction. Then, multiple carbon fiber strips 1 are embedded in the corresponding placement grooves 3. After the polyurethane layer 2 is released, the polyurethane layer 2 is deformed and restored to clamp the carbon fiber strips 1.

[0041] Disassembly process: Use engineering machinery to stretch the polyurethane layer 2 left and right, so that the placement groove 3 on the polyurethane layer 2 is deformed in the left and right directions. Then take out the multiple carbon fiber strips 1 from the corresponding placement grooves 3.

[0042] The benefits of this solution are:

[0043] 1. The polyurethane layer 2 does not completely wrap the carbon fiber strip 1, and the upper side of the carbon fiber strip 1 is exposed, which facilitates the separation of the carbon fiber strip 1 from the polyurethane layer 2.

[0044] 2. The protrusion 12 is provided to increase the connection firmness between the carbon fiber strip 1 and the placement groove 3.

[0045] 3. A taking portion 13 is provided to facilitate taking out the carbon fiber strip 1 from the placement groove 3 by machine.

[0046] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. Elevator traction rope, characterized in that: It comprises a plurality of carbon fiber strips (1) and a polyurethane layer (2); the surface of the polyurethane layer (2) in contact with the traction wheel is the lower surface of the polyurethane layer (2); The upper surface of the polyurethane layer (2) is provided with a plurality of placement grooves (3) extending downward; each carbon fiber strip (1) is arranged in one-to-one correspondence with each placement groove (3), each carbon fiber strip (1) is embedded in the corresponding placement groove (3), and the polyurethane layer (2) does not wrap the upper surface of the carbon fiber strip (1).

2. The elevator traction rope according to claim 1, characterized in that: The carbon fiber strip (1) comprises: A main body (11), the main body (11) is adapted in shape to the placement groove (3); the main body (11) can be embedded in the placement groove (3) by relying on the elastic force of the deformation of the polyurethane layer (2); A plurality of protrusions (12) are integrally arranged with the left and right side walls of the main body (11) and can be embedded in the side walls of the placement groove (3).

3. The elevator traction rope according to claim 2, characterized in that: The carbon fiber strip (1) further comprises: A pick-up portion (13) is used to facilitate separation of the carbon fiber strip (1) from the polyurethane layer (2); the pick-up portion (13) is integrally arranged on the upper surface of the main body (11); the upper end of the pick-up portion (13) protrudes from the upper end of the placement groove (3).

4. The elevator traction rope according to claim 3, characterized in that: The upper end of the taking portion (13) is lower than the upper surface of the polyurethane layer (2).

5. The elevator traction rope according to claim 4, characterized in that: The edges of the holding portion (13) and the polyurethane layer (2) are both rounded.

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