EP3738915A1

EP3738915A1 - Koepe hoist

Info

Publication number: EP3738915A1
Application number: EP20174306.9A
Authority: EP
Inventors: Ruijun HAN; Mingzhang PANG; Wei Zhang; Junfu GAO; Yali Huang
Original assignee: China ENFI Engineering Corp
Current assignee: China ENFI Engineering Corp
Priority date: 2019-05-15
Filing date: 2020-05-13
Publication date: 2020-11-18
Anticipated expiration: 2040-05-13
Also published as: EP3738915B1

Abstract

Disclosed is a Koepe hoist, including a friction drum (100), a main shaft device (200), a driving device (300), a braking mechanism (400) and at least one hoisting composite belt (500). Each hoisting composite belt (500) includes a polymer composite layer (510), and a plurality of steel or fiber ropes (520) embedded in the polymer composite layer (510). At least one limit groove (110) is formed in a circumferential direction of the friction drum (100), and a corner formed by a side surface (111) and a bottom surface (112) of the limit groove (110) has an angle of 110° to 150° and is rounded off.

Description

TECHNICAL FIELD

The present disclosure relates to a field of hoists, and more particularly to a Koepe hoist.

BACKGROUND

Normally, a friction hoisting system includes two conveyances, a plurality of ropes such as steel head ropes and steel tail ropes, a friction drum, a deflection sheave (or two head sheaves) and a motor. The Koepe hoist (also known as the friction hoist in the art) with a plurality of ropes is operated by the friction generated between the ropes winding the friction drum and friction liners. The steel head ropes are placed on the friction drum, and generally, conveyances are hung at both ends of the head ropes, or a conveyance is hung at one end and a counterweight is hung at the other end. The tail ropes may be provided at the bottom of the conveyance or the counterweight. The tail ropes are used for balancing the weights at the two ends of the steel head ropes and thus motor power used may be reduced. When the friction drum works, the friction liners are pressed by the steel head ropes to generate a friction force. Under this friction force, the head ropes move together with the friction drum to transform the conveyance up or down.
However, in a shaft where the Koepe hoist works, due to moisture, water or corrosive mist such as acid, alkali and salt mist, the steel ropes may be corroded, which causes corrosion, deformation and diameter reduction of the steel rope, thus shortening the service life of the steel ropes. An existing method for avoiding the corrosion is galvanization, which may results in increased rigidity and decreased flexibility of the galvanized steel ropes. However, the steel ropes may be corroded when the galvanization is damaged.
In addition, with the increase of the hoisting distance and payload, especially in a deep shaft or a ultra-deep shaft, the number of the steel ropes and the diameter of the friction drum required for the Koepe hoist are correspondingly increased, and thus the weight of the head rope and the volume and weight of the friction drum are also significantly increased, resulting in problems such as a large weight, a small payload capacity, a low hoisting efficiency, a short service life and a frequent replacement of steel ropes, which negatively affects transportation and installation and increases the cost.
Therefore, there is still a need to provide a Koepe hoist with a reduced size, an increased payload capacity and an improved efficiency in the art.

SUMMARY

The present disclosure seeks to solve at least one of the problems that exist in the related art to at least some extent. Accordingly, an object of the present disclosure is to provide a Koepe hoist, which may effectively solve the corrosion problem of the steel rope in the corrosive environment, and significantly reduce the diameter of the single steel rope, the diameter of the friction drum, and the volume and weight of the friction drum, so as to realize the miniaturization of the Koepe hoist. With such a Koepe hoist, the product cost can be reduced, and the payload capacity and the hoisting efficiency of the Koepe hoist can be improved, to allow the Koepe hoist to work safely, stably and efficiently.
In order to achieve the above object, the present disclosure provides in embodiments a Koepe hoist, including: a friction drum, wherein at least one limit groove is formed in a circumferential direction of the friction drum, a corner formed by a side surface and a bottom surface of the limit groove has an angle of 110° to 150°, and is rounded off; a main shaft device passing through the friction drum and being fixed with the friction drum; a driving device connected to the friction drum to drive the friction drum to rotate; a braking mechanism connected to the friction drum to drive the friction drum to decelerate or stop rotating; and at least one hoisting composite belt, wherein each hoisting composite belt comprises: a polymer composite layer, and a plurality of steel or fiber ropes embedded in the polymer composite layer.
With the Koepe hoist according to the above embodiments of the present disclosure, on the one hand, by replacing the existing steel head rope with the hoisting composite belt, the steel or fiber ropes inside the hoisting composite belt can be prevented from contacting with the external environment, and thus the corrosion caused by the external environment such as moisture, water or corrosive mist can be avoided, and a slip phenomenon can be also avoided since the friction coefficient of the hoisting composite belt and the friction drum is improved by the polymer composite layer as the outer layer of the hoisting composite belt. Compared with the steel head rope used in the related art, under same hoisting distance and payload, the hoisting composite belt of the present disclosure can further reduce the diameter of the steel or fiber rope and the diameter of the friction drum matched with the hoisting composite belt, thus significantly reducing the volume and weight of the friction drum and the equipment cost. On the other hand, in the present disclosure, by providing the limit groove on the friction drum and defining the angle between the side surface and the bottom surface of the limit groove in a range of 110° to 150°, the movement direction of the hoisting composite belt can be adjusted to prevent the hoisting composite belt from being deviated from its normal position and/or avoid collision and overlap when multiple hoisting composite belts are used in parallel, the weight of the friction drum may be further reduced, to allow the Koepe hoist to work safely, stably and efficiently. Moreover, the corner formed by the side surface and the bottom surface of the limit groove is rounded off to avoid stress concentration at the place where the edge of the hoisting composite belt is in contact with the limit groove during the hoisting operation, thus avoiding damages to the edge of the hoisting composite belt. Therefore, the Koepe hoist of the present disclosure may effectively solve the corrosion problem of the steel rope in the corrosive environment, and significantly reduce the diameter of the single steel rope, the diameter of the friction drum, and the volume and weight of the friction drum, so as to realize the miniaturization of the Koepe hoist. With such a Koepe hoist, the product cost can be reduced, and the payload capacity and the hoisting efficiency of the Koepe hoist can be improved, to allow the Koepe hoist to work safely, stably and efficiently.
In addition, the Koepe hoist according to the above embodiments of the present disclosure may also have the following additional technical features.
In an embodiment of the present disclosure, when one limit groove is formed at a surface of the friction drum, the bottom surface of the limit groove has a width ranging from 803 to 3008 mm, preferably from 803 to 1008 mm; or when a plurality of limit grooves are formed at the surface of the friction drum, the bottom surface of the limit groove has a width ranging from 103 to 808 mm, preferably from 203 to 458 mm.
In an embodiment of the present disclosure, a distance between centerlines of two adjacent limit grooves is not less than 250 mm.
In an embodiment of the present disclosure, the Koepe hoist has a ratio of a depth of the limit groove to a thickness of the hoisting composite belt in a range of (0.5 to 1.1) : 1, preferably in a range of (0.6 to 1) : 1, and/or a ratio of the width of the bottom surface to a width of the hoisting composite belt in a range of (1.01 to 1.06): 1, preferably in a range of (1.01 to 1.04): 1.
In an embodiment of the present disclosure, the width of the bottom surface of the limit groove is 3 to 8 mm greater than the width of the hoisting composite belt.
In an embodiment of the present disclosure, the driving device is a synchronous motor or an asynchronous motor, and the synchronous motor or the asynchronous motor is directly connected to the friction drum or connected to the friction drum via a coupler or a reducer.
In an embodiment of the present disclosure, the braking mechanism comprises a brake, a brake disc, a hydraulic station and a control device, wherein the brake disc is disposed at one end or both ends of the friction drum, and the brake is provided at the brake disc.
In an embodiment of the present disclosure, the friction drum has a diameter of 2.25 to 6.5 m and/or a width of 2 to 6.8 m.
In an embodiment of the present disclosure, each hoisting composite belt further comprises at least one positioning steel wire perpendicular to the plurality of steel or fiber ropes and fixedly connected with each of the plurality of steel or fiber ropes.
In an embodiment of the present disclosure, the plurality of steel or fiber ropes are aligned in a layer in parallel to a surface of the hoisting composite belt, and the hoisting composite belt comprises 1 to 3 layers, preferably 2 layers, of the steel or fiber ropes.
In an embodiment of the present disclosure, a distance between two adjacent steel or fiber ropes in each layer is independently in a range of 3 to 10 mm, and/or a distance between two adjacent layers of the steel or fiber ropes is independently in a range of 3 to 10 mm.
In an embodiment of the present disclosure, the hoisting composite belt has the steel or fiber rope with a diameter of 3 to 30 mm, and/or a thickness of 10 to 80 mm.
In an embodiment of the present disclosure, the at least one positioning steel wire is fixed to each steel or fiber rope in a winding manner and/or by a rope clamping.
In an embodiment of the present disclosure, the fiber rope comprises at least one selected from carbon fiber, polyethylene fiber, aramid fiber, nylon fiber, polyester fiber and polypropylene fiber.
In an embodiment of the present disclosure, the polymer composite layer comprises at least one selected from polyurethane, a rubber and a resin.
Additional aspects and advantages of embodiments of present disclosure will be given in part in the following descriptions, become apparent in part from the following descriptions, or be learned from the practice of the embodiments of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other aspects and advantages of embodiments of the present disclosure will become apparent and more readily appreciated from the following descriptions made with reference to the drawings, in which:

Fig. 1 is a schematic diagram of a Koepe hoist according to an embodiment of the present disclosure;
Fig. 2 is a schematic diagram of a hoisting composite belt according to an embodiment of the present disclosure;
Fig. 3 is a schematic diagram of a cross-section of two adjacent limit grooves according to an embodiment of the present disclosure;
Fig. 4 is a schematic diagram of a cross-section of a hoisting composite belt according to an embodiment of the present disclosure;
Fig. 5 is a schematic diagram of a cross-section of a hoisting composite belt according to another embodiment of the present disclosure; and
Fig. 6 is a schematic diagram of a cross-section of a hoisting composite belt according to a further embodiment of the present disclosure.

DETAILED DESCRIPTION

Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the drawings. The same or similar elements are denoted by same reference numerals in different drawings unless indicated otherwise. The embodiments described herein with reference to drawings are explanatory, and used to generally understand the present disclosure. The embodiments shall not be construed to limit the present disclosure.
The present disclosure provides in embodiments a Koepe hoist. Koepe hoist provided in the embodiments of the present disclosure is described below with reference to the drawings.
Fig. 1 is a schematic diagram of a Koepe hoist according to an embodiment of the present disclosure. As shown in Fig. 1, the Koepe hoist includes a friction drum 100, a main shaft device 200, a driving device 300, a braking mechanism 400 and at least one hoisting composite belt 500. At least one limit groove 110 is formed in a circumferential direction of the friction drum 100, a corner formed by a side surface 111 and a bottom surface 112 of the limit groove 110 has an angle of 110° to 150°, preferably in a range of 110° to 140°, and is rounded off. The main shaft device 200 passes through the friction drum and being fixed with the friction drum 100. The driving device 300 is connected to the friction drum 100 to drive the friction drum 100 to rotate. The braking mechanism 400 is connected to the friction drum 100 to drive the friction drum 100 to decelerate or stop rotating.
Fig. 2 is a schematic diagram of a hoisting composite belt according to an embodiment of the present disclosure. As shown in Fig. 2, the hoisting composite belt 500 includes a polymer composite layer 510 and a plurality of steel or fiber ropes 520. The plurality of steel or fiber ropes 520 is embedded in the polymer composite layer 510. In an embodiment of the present disclosure, the hoisting composite belt 500 may further include at least one positioning steel wire 530 perpendicular to the plurality of steel or fiber ropes 520 and fixedly connected with each of the plurality of steel or fiber ropes 520.
In the Koepe hoist according to the above embodiments of the present disclosure, on the one hand, by replacing the existing steel head rope with the hoisting composite belt 500, the steel or fiber ropes 520 inside the hoisting composite belt 500 can be prevented from contacting the external environment, and thus the corrosion caused by the external environment such as moisture, water or corrosive mist can be avoided, and a slip phenomenon can be also avoided since the friction coefficient of the hoisting composite belt 500 and the friction drum 100 is improved by the polymer composite layer 510 as the outer layer of the hoisting composite belt 500. By using the at least one positioning steel wire 530 to horizontally fix each steel or fiber rope 520, the uniformity distribution of the steel or fiber ropes 520 in the hoisting composite belt 500 can be realized, such that each head rope 520 may provide a full function under a normal payload during working, thus improving the uniformity of the stress distribution of the hoisting composite belt 500 to avoid stress concentration, and significantly improving firmness and stability of the hoisting composite belt 500. Therefore, the hoisting composite belt 500 of the present disclosure is safe and reliable, and it may also improve the hoisting efficiency and extend the service life of the steel or fiber rope 520. Compared with the steel head rope used in the related art, under same hoisting distance and payload, the hoisting composite belt 500 of the present disclosure can further reduce the diameter of the steel or fiber rope 520 and the diameter of the friction drum 100 matched with the hoisting composite belt 500, thus significantly reducing the volume and weight of the friction drum 100 and the equipment cost. For example, when the hoisting distance is 1950 m and the payload is 10 t, the diameter of the friction drum 100 required in this case is only 2.8 m.
On the other hand, in the present disclosure, by providing the limit groove 110 on the friction drum 100 and defining the angle between the side surface 111 and the bottom surface 112 of the limit groove 110 in a range of 110° to 150°, preferably in a range of 110° to 140°, the movement direction of the hoisting composite belt 500 can be adjusted to prevent the hoisting composite belt from being deviated from the normal position and/or avoid collision and overlap when multiple hoisting composite belts are used in parallel, the weight of the friction drum 100 may be further reduced, to allow the Koepe hoist to work safely, stably and efficiently. Moreover, the corner formed by the side surface 111 and the bottom surface 112 of the limit groove is rounded off to avoid stress concentration at the place where the edge of the hoisting composite belt 500 is in contact with the limit groove 110 during the hoisting operation, thus avoiding damages to the edge of the hoisting composite belt 500. Therefore, the Koepe hoist of the present disclosure may effectively solve the corrosion problem of the steel rope in the corrosive environment, and significantly reduce the diameter of the single steel rope, the diameter of the friction drum, and the volume and weight of the friction drum, so as to realize the miniaturization of the Koepe hoist. With such a Koepe hoist, the product cost can be reduced, and the payload capacity and the hoisting efficiency of the Koepe hoist can be improved, to allow the Koepe hoist to work safely, stably and efficiently.
In an embodiment of the present disclosure, there may be a plurality of the limit grooves 110. For example, in Fig. 1, there are four limit grooves 110 and the hoisting composite belts 500 applied therein are arranged in parallel. Compared with a single hoisting composite belt, under the same hoisting distance and payload, the plurality of hoisting composite belts 500 arranged in parallel may further reduce the overall width and weight of the hoisting composite belt matched to the limit groove, which benefits installation and use of the hoisting composite belt 500. Specifically, there may be 1 to 8 limit grooves 110, such as 1, 2, 3, 4, 5, 6, 7 and 8, preferably, the number of the limit grooves 110 is an even number. It has been found that when the number of the limiting grooves 110 is large, the number of the hoisting composite belts 500 used therein is also relatively large. Although the installation is not complex, it is still required to repeat the installation for several times, so that it is difficult to ensure the balance between the hoisting composite belts 500. In the present disclosure, the number of the limit grooves 110 is limited in a range of 1 to 8, to allow the Koepe hoist to work safely, stably and efficiently.
In an embodiment of the present disclosure, when there is one limit groove formed at a surface of the friction drum, the bottom surface of the limit groove has a width W ranging from 803 to 3008 mm. When there is a plurality of limit grooves formed at the surface of the friction drum, the bottom surface of the limit groove has a width W ranging from 103 to 808 mm, as shown in Fig. 3. It has been found that for a certain width of the friction drum, if the bottom surface 112 of the limit groove 110 is wide, the width of the hoisting composite belt 500 used to match the limit groove 110 is also wide, resulting in a large weight of the hoisting composite belt 500, thus negatively affecting the installation of the hoisting composite belt 500 and making it difficult to keep the hoisting composite belts 500 in balance during working, and if the bottom surface 112 of the limit groove 110 is narrow, the width of the hoisting composite belt 500 used to match the hoisting composite belt is also narrow, resulting in a large number of the hoisting composite belts 500 in parallel to achieve the desired hoisting distance and payload, thus negatively affecting the installation of the hoisting composite belt 500 and the operation efficiency for fixing the hoisting composite belts 500 to the hoisting conveyance, and making it difficult to keep the hoisting composite belts 500 in balance during working. In the present disclosure, by controlling the width of the bottom surface 112 of the limit groove 110 in the above range, the Koepe hoist can work safely, stably and efficiently. Preferably, the width W of the bottom surface 112 of the limit groove 110 can be in a range of 803 to 1008 mm (when one limit groove is applied) or in a range of 203 to 458 mm (when the plurality of the limit grooves is applied), to allow the Koepe hoist to work more safely, stably and efficiently. Further, a distance L between centerlines of two adjacent limit grooves 110 is not less than 250 mm. Therefore, when the friction drum 100 has a fixed width, the number of the limit grooves 110 and the width of the hoisting composite belt 500 corresponding to the limit groove 110 may be controlled to allow the Koepe hoist to work safely, stably and efficiently.
In an embodiment of the present disclosure, as shown in Fig. 3, a ratio of a depth H of the limit groove 110 to a thickness of the hoisting composite belt 500 may be in a range of (0.5 to 1.1) : 1. In an embodiment of the present disclosure, a ratio of the width W of the bottom surface 112 of the limit groove 110 to a width of the hoisting composite belt 500 may be in a range of (1.01 to 1.06): 1. In the present disclosure, by controlling the above ratios, the movement direction of the hoisting composite belt 500 may be effectively adjusted, so that the hoisting composite belt 500 may be moved in the limit groove without deviation from its normal position and/or collision and overlap due to the application of the plurality of the hoisting composite belts 500, and the weight of the friction drum 100 may be further reduced, thus realizing a safe, stable and efficient operation of the Koepe hoist. Preferably, the ratio of the depth H of the limit groove 110 to the thickness of the hoisting composite belt 500 may be in a range of (0.6 to 1.1) : 1, thus reducing the diameter of the friction drum 100 to further reduce the volume and the weight of the friction drum 100. Preferably, the ratio of the width W of the bottom surface 112 of the limit groove 110 to the width of the hoisting composite belt 500 may be in a range of (1.01 to 1.04): 1, thus adjusting the movement direction of the hoisting composite belt 500 to prevent the hoisting composite belt 500 from being deviated from its normal position and to avoid collision and overlap when the plurality of the hoisting composite belts 500 are arranged in parallel.
In an embodiment of the present disclosure, the width of the bottom surface 112 of the limit groove 110 is 3 to 8 mm greater than the width of the hoisting composite belt 500. Therefore, the hoisting composite belt 500 may be prevented from being deviated from its normal position and/or collision and overlap can be avoided when multiple hoisting composite belts are arranged in parallel.
Fig. 4 is a schematic diagram of a cross-section of a hoisting composite belt according to an embodiment of the present disclosure. As shown in Fig. 4, in an embodiment of the present disclosure, the hoisting composite belt 500 may have a trapezoid cross-section. A bottom angle θ of the trapezoid cross-section may be in a range of 30 to 70°.
In an embodiment of the present disclosure, when there is one hoisting composite belt 500 used in the Koepe hoist, the hoisting composite belt 500 has a width of 800 to 3000 mm and a thickness of 10 to 80 mm. In this case, the number of the steel or fiber ropes 520 may be in a range of 30 to 150, and the diameter of the ropes 520 may be in a range of 3 to 30 mm. When a plurality of hoisting composite belts 500 are used in parallel, the hoisting composite belt 500 has a width of 100 to 800 mm and a thickness of 10 to 80 mm. In this case, the number of the steel or fiber ropes 520 may be in a range of 8 to 30, and the diameter of the ropes 520 may be in a range of 3 to 30 mm. It has been found that as the hoisting distance and the hoisting payload increase, the diameter of the rope 520 and the diameter of the corresponding friction drum 100 also increase accordingly, resulting in a reduced efficiency for the Koepe hoist. At same hoisting distance and payload requirements, the hoisting composite belt is used to replace the steel rope so as to reduce the diameter of the single steel rope and the diameter of the corresponding friction drum. In the present disclosure, by applying the hoisting composite belt 500 as described in the above embodiments, the steel or fiber rope 520 may be prevented from contacting with the external environment to improve the protection for the steel or fiber rope, the payload capacity and mechanical properties of the hoisting composite belt may be improved to reduce the number of steel or fiber ropes required and reduce the diameter of the rope and the diameter of the corresponding friction drum, thus further reducing the equipment cost and improving the hoisting efficiency of the Koepe hoist. Preferably, when there is one hoisting composite belt 500 used in the Koepe hoist, the hoisting composite belt 500 has a width of 800 to 1000 mm, in this case, the number of the steel or fiber ropes 520 may be in a range of 30 to 50, so as to ensure that the hoisting composite belt 500 has sufficient payload capacity and mechanical properties for transportation and installation. In an embodiment of the present disclosure, a width of the hoisting composite belt 500 may be in a range of 850 to 3100 mm, and the payload may be in a range of 10 to 65 t. It should be noted that in the present disclosure, when the Koepe hoist composite belt has a trapezoid cross-section, both the short base and the long base of the trapezoid cross-section meet the range of 800 to 3000 mm. Moreover, the thickness of the hoisting composite belt 500 refers to a vertical distance between the two bases.
In an embodiment of the present disclosure, when the hoisting composite belt 500 is located in the limit groove 110, the width of the limit groove 100 is 3 to 8 mm greater than the width of the hoisting composite belt 500 in a same level, thus adjusting the movement direction of the hoisting composite belt 500. Specifically, a short base of the trapezoid cross-section of the hoisting composite belt 500 is close to the bottom surface 112 of the limit groove 110, and a long base of the trapezoid cross-section of the hoisting composite belt 500 is away from the bottom surface 112 of the limit groove 110, such that the movement direction of the hoisting composite belt 500 may be adjusted by the limit groove 110 of the friction drum 100 to prevent the hoisting composite belt 500 from being deviated from its normal position and/or avoid collision and overlap when multiple hoisting composite belts 500 are used in parallel, thus allowing the Koepe hoist to work safely, stably and efficiently.
Fig. 5 is a schematic diagram of a cross-section of a hoisting composite belt according to another embodiment of the present disclosure. As shown in Fig. 5, in an embodiment of the present disclosure, the plurality of steel or fiber ropes 520 are aligned in a layer in parallel to a surface of the hoisting composite belt 500, and the hoisting composite belt may include 1 to 3 layers of the steel or fiber ropes 520. Specifically, one layer of the steel or fiber ropes 520 is in parallel with another layer of the steel or fiber ropes 520. Moreover, the steel or fiber ropes 520 in a layer may also be in parallel with each other in a longitudinal direction of the hoisting composite belt 500. For example, when the hoisting composite belt 500 includes 2 to 3 layers of steel or fiber ropes 520, the flexibility of the hoisting composite belt 500 may be improved. Moreover, the payload capacity of the hoisting composite belt 500 can be improved and the diameter of a single steel or fiber rope in the hoisting composite belt 500 may be reduced. In an embodiment of the present disclosure, the hoisting composite belt 500 may include two layers of steel or fiber ropes 520, thus further improving the flexibility of the hoisting composite belt 500.
As shown in Fig. 5, in an embodiment of the present disclosure, the hoisting composite belt 500 includes three layers of steel ropes 520, and the diameter of the steel ropes in the middle layer is greater than the diameter of the steel ropes in the other two layers. Alternatively, the hoisting composite belt 500 includes three layers of fiber ropes 520, and the diameter of the fiber ropes in the middle layer is greater than the diameter of the fiber ropes in the other two layers. Preferably, the diameter of the steel ropes in the middle layer may be 5 to 20 mmm, for example, 5 mm, 8 mm, 11 mm, 13 mm, 16 mm and 20 mm, greater than the diameter of the steel ropes of the other two adjacent layers. Alternatively, the diameter of the fiber ropes in the middle layer may be 5 to 20 mmm, for example, 5 mm, 8 mm, 11 mm, 13 mm, 16 mm and 20 mm, greater than the diameter of the steel ropes of the other two adjacent layers. Therefore, a problem of a relative large stress for the ropes in the middle layer of the hoisting composite belt may be solved. Moreover, the intensity and the payload capacity of the hoisting composite belt may be improved without increasing the size of the cross-section of the hoisting composite belt.
In an embodiment of the present disclosure, as shown in Fig. 5, a distance l₁ between two adjacent steel or fiber ropes 520 in each layer is independently in a range of 3 to 10 mm, and/or a distance l₂ between two adjacent layers of the steel or fiber ropes 520 is independently in a range of 3 to 10 mm. In this way, the distribution density of steel or fiber ropes 520 may be adjusted to improve the cohesion of the hoisting composite belt 500, thus improving the payload capacity of the hoisting composite belt 500. Preferably, the distance l₁ between two adjacent ropes 520 in one layer is the same, and the distance l₂ between two adjacent layers is the same, such that the hoisting composite belt 500 may be stressed uniformly. It should be noted that in each layer or two adjacent layers, the distance between two adjacent ropes 520 refers to a shortest distance between tangents of two adjacent ropes 520.
In an embodiment of the present disclosure, the hoisting composite belt 500 may have the steel or fiber rope 520 with a diameter of 3 to 30 mm. Further, the hoisting composite belt 500 may have a thickness d of 10 to 80 mm. With the hoisting composite belt of the present disclosure, the diameter of the head rope may be reduced and the payload capacity of the hoisting composite belt 500 may be improved when the hoisting composite belt still has a good flexibility.
In an embodiment of the present disclosure, as shown in Figs. 4 and 6, the positioning steel wire 530 is fixed to each steel or fiber rope in a winding manner and/or by a rope clamping 531, so as to improve the distribution uniformity of the steel or fiber ropes 520 in the hoisting composite belt 500 and improve the cohesion of the hoisting composite belt, to allow each head rope 520 to provide a full function under a normal payload during working and to avoid the stress concentration, thus significantly improving firmness and stability of the hoisting composite belt 500 and improving the payload capacity of the hoisting composite belt 500.
Further, the diameter of the positioning steel wire 530 may be in a range of 2 to 5 mm, and an interval distance between two adjacent positioning steel wires 530 may be in a range of 50 to 100 m, which not only has a small impact on the overall thickness and width of the hoisting composite belt 500, but also can be beneficial to the distribution of the steel or fiber ropes 520 in the hoisting composite belt 500, thus contributing to improvements in the firmness, the stability, the payload capacity and the service life of the hoisting composite belt. It should be noted that the winding manner and the type of the rope clamping in the present disclosure are not particularly limited, and can be selected according to the practices. For example, the winding manner may be winding, knotting or winding with the rope clamping. The rope clamping may be in detachable or non-removable type, single-hole or double-hole type, U-bolt type or double saddle type.
In an embodiment of the present disclosure, the number of the hoisting composite belts 500 in the present disclosure may adjusted according to the hoisting conditions such as the hoisting distance, the weight of the hoisting conveyance, the diameter of the friction drum, the payload demand, the number and diameter of the head ropes 520 in the hoisting composite belt 500.
In an embodiment of the present disclosure, the fiber rope may include high-performance fibers. The type of the fiber rope 520 in the present disclosure is not particularly limited, and may be selected according to the practices. For example, the fiber rope 520, preferably the high-performance fiber rope, includes at least one selected from carbon fiber, polyethylene fiber, aramid fiber, nylon fiber, polyester fiber and polypropylene fiber. Thereby, the hoisting composite belt 500 may have a high tensile strength and a low weight.
In an embodiment of the present disclosure, the polymer composite layer 510 may include a high-performance fiber mesh, which can not only further improve the payload capacity of the hoisting composite belt 500, but also prevent the outer composite 510 from falling off due to local aging or collision.
In an embodiment of the present disclosure, the polymer composite layer 510 may include an organic reinforcement material. Further, the polymer composite layer 510 may include at least one selected from polyurethane, a rubber and a resin. It has been found that with the above polymer materials, the toughness and friction coefficient of the hoisting composite belt can be improved, which can further improve the hoisting efficiency of the Koepe hoist and increase the service life of the hoisting composite belt.
In an embodiment of the present disclosure, the type of the driving device 300 is not particularly limited, and may be selected according to the practices. For example, the driving device 300 may be a synchronous motor or an asynchronous motor, and the asynchronous motor or the asynchronous motor may be directly connected to the friction drum 100 or connected to the friction drum 100 via a coupler or a reducer, thus effectively driving the friction drum 100 to rotate, and providing driving force by the friction between the friction drum 100 and the hoisting composite belt 500.
In an embodiment of the present disclosure, the type of the braking mechanism 400 is not particularly limited, and may be selected according to the practices. For example, the braking mechanism 400 may include a brake, a brake disc, a hydraulic station and a control device. The brake disc is disposed at one end or both ends of the friction drum 100, and the brake is provided at the brake disc. Alternatively, the brake may be multiple sets of disc brakes, thus effectively driving the friction drum 100 to decelerate or stop rotating.
In an embodiment of the present disclosure, the diameter and the width of the friction drum 100 are not particularly limited, and may be selected according to the operating conditions, such as hoisting distance, hoisting conveyance weight, payload requirement, and properties of the hoisting composite belt 500. The friction drum may have a diameter of 2.25 to 6.5 m. Further, the friction drum may have a width of 2 to 6.8 m. In this case, the hoisting distance may reach 800 to 3000 m, and the payload may be in a range of 10 to 65 t.
The present disclosure will be described below with reference to specific examples. It should be noted that these examples are illustrative and shall not be construed to limit the present disclosure.

Inventive Example 1

A Koepe hoist with 6 limit grooves and 6 hoisting composite belts is used under conditions of a hoisting distance of 1950 m, a weight of a hoisting conveyance of 30 t and a normal payload of 10 t. A corner formed by a side surface and a bottom surface of the limit groove has an angle of 110° and is rounded off. The limit groove has a width of the bottom surface of 233 mm and a depth of 28 mm, and the cross-section of the hoisting composite belt has a width of 230 mm and a thickness of 28 mm. A diameter of one steel rope in the hoisting composite belt is 20 mm. The friction drum of the Koepe hoist has a diameter of 2.8 m and a width is 3.0 m. When the Koepe hoist is operated during the hoisting process, the hoisting composite belt is not deviated from its normal position.

Inventive Example 2

A Koepe hoist with 6 limit grooves and 6 hoisting composite belts is used under conditions of a hoisting distance of 1950 m, a weight of a hoisting conveyance of 30 t and a normal payload of 10 t. A corner formed by a side surface and a bottom surface of the limit groove has an angle of 110° and is rounded off. The limit groove has a width of the bottom surface of 203 mm and a depth of 24 mm, and the cross-section of the hoisting composite belt has a width of 200 mm and a thickness of 24 mm. A diameter of one high performance fiber rope in the hoisting composite belt is 16 mm. The friction drum of the Koepe hoist has a diameter of 2.25 m and a width is 2.8 m. When the Koepe hoist is operated during the hoisting process, the hoisting composite belt is not deviated from its normal position.

Comparable Example 1

A Koepe hoist with 6 steel ropes is used under conditions of a hoisting distance of 1950 m, a weight of a hoisting conveyance of 30 t and a normal payload of 10 t. It is required that a diameter of one steel rope is 58 mm, a diameter of a friction drum of the Koepe hoist is 6.0 m and a width of the friction drum is 3.0 m.
As shown in the inventive examples, by replacing the steel rope with the hoisting composite belt and providing the limit groove on the friction drum, each of the hoisting composite belts used may be slightly moved in the limit groove of the Koepe hoist without large deviation. Moreover, compared with the comparative example, under the same hoisting conditions, the required diameter of the head rope, the required diameter of the friction drum are significantly reduced, and thus the weight and volume of the Koepe hoist can be reduced, which may benefit the installation of the Koepe hoist and improve the hoisting efficiency.
In the specification, it is to be understood that terms such as "central", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial" and "circumferential" should be construed to refer to the orientation as then described or as shown in the drawings under discussion. These relative terms are for convenience of description and do not require that the present disclosure be constructed or operated in a particular orientation, and thus shall not be construed to limit the present disclosure.
In the present disclosure, unless specified or limited otherwise, the terms "mounted", "connected", "coupled", "fixed" and the like are used broadly, and may be, for example, fixed connections, detachable connections, or integral connections; may also be mechanical or electrical connections; may also be direct connections or indirect connections via intervening structures; may also be inner communications of two elements, which can be understood by those skilled in the art according to specific situations.
In the description, unless specified or limited otherwise, a structure in which a first feature is "on" or "below" a second feature may include an embodiment in which the first feature is in direct contact with the second feature, and may also include an embodiment in which the first feature and the second feature are not in direct contact with each other, but are contacted via an additional feature formed therebetween. Furthermore, a first feature "on", "above" or "on top of' a second feature may include an embodiment in which the first feature is right or obliquely "on", "above" or "on top of' the second feature, or just means that the first feature is at a height higher than that of the second feature; while a first feature "below", "under" or "on bottom of' a second feature may include an embodiment in which the first feature is right or obliquely "below", "under" or "on bottom of' the second feature, or just means that the first feature is at a height lower than that of the second feature.
Reference throughout this specification to "an embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. Thus, the appearances of above phrases in various places throughout this specification are not necessarily referring to the same embodiment or example of the present disclosure. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples. In addition, different embodiments or examples described in the specification, as well as features of embodiments or examples, without conflicting, may be combined by one skilled in the art.
Although explanatory embodiments have been shown and described, it would be appreciated by those skilled in the art that the above embodiments cannot be construed to limit the present disclosure, and changes, alternatives, and modifications can be made in the embodiments without departing from scope of the present disclosure.

Claims

A Koepe hoist, comprising:
a friction drum (100), wherein at least one limit groove (110) is formed in a circumferential direction of the friction drum (100), a corner formed by a side surface (111) and a bottom surface (112) of the limit groove (110) has an angle of 110° to 150° and is rounded off;

a main shaft device (200) passing through the friction drum (100) and being fixed with the friction drum (100);

a driving device (300) connected to the friction drum (100) to drive the friction drum (100) to rotate;

a braking mechanism (400) connected to the friction drum (100) to drive the friction drum (100) to decelerate or stop rotating; and

at least one hoisting composite belt (500), wherein each hoisting composite belt (500) comprises:
a polymer composite layer (510), and

a plurality of steel or fiber ropes (520) embedded in the polymer composite layer (510).
The Koepe hoist according to claim 1, wherein
when one limit groove (110) is formed at a surface of the friction drum (100), the bottom surface of the limit groove (110) has a width ranging from 803 to 3008 mm, preferably from 803 to 1008 mm; or
when a plurality of limit grooves (110) are formed at the surface of the friction drum (100), the bottom surface of the limit groove (110) has a width ranging from 103 to 808 mm, preferably from 203 to 458 mm.
The Koepe hoist according to claim 1 or 2, wherein a distance between centerlines of two adjacent limit grooves (110) is not less than 250 mm.
The Koepe hoist according to any one of claims 1 to 3, wherein the Koepe hoist has
a ratio of a depth of the limit groove (110) to a thickness of the hoisting composite belt (500) in a range of (0.5 to 1.1): 1, preferably in a range of (0.6 to 1) : 1, and/or
a ratio of the width of the bottom surface to a width of the hoisting composite belt (500) in a range of (1.01 to 1.06): 1, preferably in a range of (1.01 to 1.04): 1.
The Koepe hoist according to claim 4, wherein the width of the bottom surface of the limit groove (110) is 3 to 8 mm greater than the width of the hoisting composite belt (500).
The Koepe hoist according to any one of claims 1 to 5, wherein the driving device (300) is a synchronous motor or an asynchronous motor, and the synchronous motor or the asynchronous motor is directly connected to the friction drum (100) or connected to the friction drum (100) via a coupler or a reducer.
The Koepe hoist according to any one of claims 1 to 6, wherein the braking mechanism (400) comprises a brake, a brake disc, a hydraulic station and a control device, wherein the brake disc is disposed at one end or both ends of the friction drum (100), and the brake is provided at the brake disc.
The Koepe hoist according to any one of claims 1 to 7, wherein the friction drum (100) has a diameter of 2.25 to 6.5 m and/or a width of 2 to 6.8 m.
The Koepe hoist according to any one of claims 1 to 8, wherein each hoisting composite belt (500) further comprises at least one positioning steel wire (530) perpendicular to the plurality of steel or fiber ropes (520) and fixedly connected with each of the plurality of steel or fiber ropes (520).
The Koepe hoist according to any one of claims 1 to 9, wherein the plurality of steel or fiber ropes (520) are aligned in a layer in parallel to a surface of the hoisting composite belt (500), and the hoisting composite belt (500) comprises 1 to 3 layers, preferably 2 layers, of the steel or fiber ropes (520).
The Koepe hoist according to any one of claims 1 to 10, wherein a distance between two adjacent steel or fiber ropes (520) in each layer is independently in a range of 3 to 10 mm, and/or a distance between two adjacent layers of the steel or fiber ropes (520) is independently in a range of 3 to 10 mm.
The Koepe hoist according to any one of claims 1 to 11, wherein the hoisting composite belt (500) has
the steel or fiber rope with a diameter of 3 to 30 mm, and/or
a thickness of 10 to 80 mm.
The Koepe hoist according to claim 9, wherein the at least one positioning steel wire (530) is fixed to each steel or fiber rope in a winding manner and/or by a rope clamping (531).
The Koepe hoist according to any one of claims 1 to 13, wherein the fiber rope comprises at least one selected from carbon fiber, polyethylene fiber, aramid fiber, nylon fiber, polyester fiber and polypropylene fiber.
The Koepe hoist according to any one of claims 1 to 14, wherein the polymer composite layer (510) comprises at least one selected from polyurethane, a rubber and a resin.