A belt-type passive resistor for belt conveyors

Abstract

The present application discloses a belt-type passive resistor for a belt conveyor. When the belt conveyor operates, the first belt on the carrying idler rotates along with the belt of the belt conveyor, and transmits the rotational force to the variable-speed idler through the first belt. The variable-speed idler drives the second belt to rotate. As the second belt rotates, the first resistance-increasing idler connected thereto also rotates. Since the shaft diameter of the variable-speed idler is larger than that of the carrying idler, when the carrying idler rotates one circle, the first resistance-increasing idler has not rotated a full circle yet. Thus, a speed difference is formed between the second belt and the belt of the belt conveyor, that is, the speed of the second belt is slower than that of the belt of the belt conveyor, thereby forming a frictional resistance, and further achieving the effect of increasing the resistance; the second resistance-increasing idler can increase the pressure between the second belt and the belt of the belt conveyor and improve the resistance effect.

Description

Technical Field

[0001] The present application relates to the field of belt conveyor protection devices, and particularly to a belt passive resistor for a belt conveyor. Background Art

[0002] The large-angle belt conveyor is mainly used for the large-angle continuous conveying of bulk materials. It uses a conveyor belt with corrugated sidewalls and cross partitions, and the conveying inclination angle is 0 to 90 degrees (preferably below 70 degrees). It is widely used in industries such as coal, grain, building materials, chemical industry, hydropower, agriculture, ports, and metallurgy. For materials with special requirements, such as materials resistant to high temperatures or having acid-base properties or oil substances, corresponding materials can be specially designed according to needs. It has the advantages of high reliability in horizontal or small-angle conveying of general belt conveyors, energy conservation, and reliable and economical material lifting.

[0003] During the actual use process, the large-angle belt conveyor may experience phenomena such as stalling and running away. The common method to solve this phenomenon is to use a combination of an electric motor and a push rod stopper to brake the belt. However, this method has the following drawbacks:

[0004] (1) It cannot stop normally. Each time it stops, it needs to idle for a long time and rely on the electric motor + push rod brake for braking. However, when the power is cut off, the electric motor and the push rod brake also stop working, and it can only let it run away and operate, which is extremely dangerous.

[0005] (2) Currently, damping idler rollers are used in the industry to increase resistance. However, after the damping idler rollers operate for a certain period of time, the resistance is the same as that of ordinary idler rollers, and there is no function of increasing resistance.

[0006] (3) Through actual investigations, each coal mine has no choice but to use damping plates to increase resistance, that is, to fix rubber plates with a certain area at the bottom of the upper and lower conveyor belts and rub against the conveyor belt. Long-term use will cause spontaneous combustion and become a major safety hazard in coal mines. Summary of the Invention

[0007] The present application provides a belt passive resistor for a belt conveyor, which solves the problem of potential safety hazards caused by stalling and running away of the large-angle belt conveyor.

[0008] To solve the above technical problems, the present application provides a belt passive resistor for a belt conveyor, including:

[0009] The machine body is provided with a carrying idler at its upper side, a variable-speed idler is arranged obliquely below the carrying idler, a first resistance-increasing idler is arranged obliquely below the variable-speed idler, a second resistance-increasing idler is arranged obliquely below the first resistance-increasing idler, the carrying idler is connected to the variable-speed idler through a first belt, the variable-speed idler is connected to the first resistance-increasing idler through a second belt, the machine body is provided with a first vertical beam, a second vertical beam, a first cross beam and a second cross beam, the first resistance-increasing idler is arranged on both the first vertical beam and the second vertical beam, two variable-speed idlers are arranged on the first cross beam, and two second resistance-increasing idlers are arranged on the second cross beam.

[0010] Preferably, the variable-speed idler and the first resistance-increasing idler are connected by two second belts.

[0011] Preferably, a conveyor belt is arranged between the first resistance-increasing idler and the second resistance-increasing idler.

[0012] Preferably, the first belt is connected to a conveyor belt.

[0013] Preferably, the middle of the variable-speed idler is thick and both ends are thin.

[0014] Compared with the prior art, for a belt-type passive resistor for a belt conveyor provided in this application, when the belt conveyor is running, the first belt on the carrying idler rotates following the belt of the belt conveyor, and transmits the rotational force to the variable-speed idler through the first belt. The variable-speed idler drives the second belt to rotate. As the second belt rotates, the first resistance-increasing idler connected to it also rotates. Since the shaft diameter of the variable-speed idler is larger than that of the carrying idler, when the carrying idler rotates one circle, the first resistance-increasing idler has not rotated a full circle yet. Thus, a speed difference is formed between the second belt and the belt of the belt conveyor, that is, the speed of the second belt is slower than that of the belt of the belt conveyor, thereby forming a frictional resistance, and further achieving the effect of increasing resistance; the second resistance-increasing idler can increase the pressure between the second belt and the belt of the belt conveyor and improve the resistance effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of this application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0016] Figure 1 Schematic diagram of the installation structure of a belt-type passive resistor for a belt conveyor and the belt conveyor provided by an embodiment of the present invention;

[0017] Figure 2 Schematic diagram of the structure of a belt-type passive resistor for a belt conveyor provided by an embodiment of the present invention.

[0018] In the figure, 1 is the body, 2 is the carrying idler, 3 is the variable-speed idler, 4 is the first resistance-increasing idler, 5 is the second resistance-increasing idler, 6 is the first belt, 7 is the second belt, 8 is the first vertical beam, 9 is the second vertical beam, 10 is the first cross beam, 11 is the second cross beam, 12 is the belt of the belt conveyor, and 13 is the belt conveyor. Specific implementation mode

[0019] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings.

[0020] The core of this application is to provide a belt passive resistance increaser for a belt conveyor, which can solve the problem of potential safety hazards caused by stall and runaway of a large-angle belt conveyor.

[0021] Figure 1 The figure is a schematic installation structure diagram of a belt passive resistance increaser for a belt conveyor provided by an embodiment of the present invention and the belt conveyor. Figure 2 The figure is a schematic structure diagram of a belt passive resistance increaser for a belt conveyor provided by an embodiment of the present invention. As Figure 1 and Figure 2 shown, it includes:

[0022] The body 1, the upper side of the body 1 is provided with the carrying idler 2, the variable-speed idler 3 is arranged obliquely below the carrying idler 2, the first resistance-increasing idler 4 is arranged obliquely below the variable-speed idler 3, the second resistance-increasing idler 5 is arranged obliquely below the first resistance-increasing idler 4, the carrying idler 2 is connected to the variable-speed idler 3 through the first belt 6, the variable-speed idler 3 is connected to the first resistance-increasing idler 4 through the second belt 7, the body 1 is provided with the first vertical beam 8, the second vertical beam 9, the first cross beam 10 and the second cross beam 11, the first resistance-increasing idler 4 is arranged on both the first vertical beam 8 and the second vertical beam 9, two variable-speed idlers 3 are arranged on the first cross beam 10, and two second resistance-increasing idlers 5 are arranged on the second cross beam 11.

[0023] Specifically, the passive resistance increaser is mainly installed on the belt conveyor 13. The first vertical beam 8 and the second vertical beam 9 are connected to the main structure of the belt conveyor 13. The load-carrying idler 2 is a component of the belt conveyor 13. The load-carrying idler 2 is connected to the variable-speed idler 3 through the first belt 6, and at the same time transmits the rotational force of the load-carrying idler 2 to the variable-speed idler 3. Preferably, the middle of the variable-speed idler 3 is thick and the two ends are thin. Being thick in the middle and thin at the two ends can generate a speed difference. The rotational speed of the load-carrying idler 2 is relatively fast. When it is transmitted to the variable-speed idler 3 through the first belt 6, since the diameter of the middle part of the variable-speed idler 3 is larger than the diameter of the load-carrying idler 2, the rotational speed of the variable-speed idler 3 becomes slower, thereby achieving speed change. The variable-speed idler 3 with a slower rotational speed transmits the rotational force to the first resistance-increasing idler 4 through the second belt 7, enabling the first resistance-increasing idler 4 to rotate slowly. The second belt 7 is in contact with the belt of the belt conveyor 13. Due to the speed difference, a relative frictional force is formed, and the frictional force increases the resistance of the belt conveyor 13.

[0024] When the passive resistance increaser is operating, in order to ensure that the variable-speed idler 3 and the first resistance-increasing idler 4 do not shift during rotation, preferably, the variable-speed idler 3 and the first resistance-increasing idler 4 are connected by two second belts 7.

[0025] To improve the resistance effect of the passive resistance increaser, preferably, the first belt 6 is connected to the belt conveyor belt 12. Preferably, a belt conveyor belt 12 is arranged between the first resistance-increasing idler 4 and the second resistance-increasing idler 5. Connecting the first belt 6 to the belt conveyor belt 12 can increase the contact area between the first belt 6 and the belt conveyor belt 12. Arranging the belt conveyor belt 12 between the first resistance-increasing idler 4 and the second resistance-increasing idler 5 can increase the pressure between the first belt 6 and the belt conveyor belt 12. The increase in pressure also increases the resistance between the passive resistance increaser and the belt conveyor 13.

[0026] For the belt-type passive resistance increaser for a belt conveyor provided in this application, when the belt conveyor is operating, the first belt on the load-carrying idler rotates following the belt of the belt conveyor, and transmits the rotational force to the variable-speed idler through the first belt. The variable-speed idler drives the second belt to rotate. As the second belt rotates, the first resistance-increasing idler connected to it also rotates. Since the shaft diameter of the variable-speed idler is larger than the shaft diameter of the load-carrying idler, when the load-carrying idler rotates one circle, the first resistance-increasing idler has not rotated a full circle yet. Thus, a speed difference between the second belt and the belt conveyor belt is formed, that is, the speed of the second belt is slower than the speed of the belt conveyor belt, thereby forming a frictional resistance, and further achieving the effect of increasing the resistance; the second resistance-increasing idler can increase the pressure between the second belt and the belt conveyor belt, improving the resistance effect.

[0027] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include the common general knowledge or conventional technical means in the technical field disclosed in the present application. The specification and examples are only regarded as exemplary, and the true scope of the present application is pointed out by the claims.

[0028] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The embodiments of the present application described above do not constitute a limitation on the protection scope of the present application.

Claims

1. A belt-type passive resistor for a belt conveyor, characterized in that, Comprising: A machine body, on the upper side of the machine body, there is a carrying idler, obliquely below the carrying idler, there is a variable-speed idler, obliquely below the variable-speed idler, there is a first resistance-increasing idler, obliquely below the first resistance-increasing idler, there is a second resistance-increasing idler, the carrying idler is connected to the variable-speed idler through a first belt, the variable-speed idler is connected to the first resistance-increasing idler through a second belt, on the machine body, there are a first vertical beam, a second vertical beam, a first cross beam and a second cross beam, on both the first vertical beam and the second vertical beam, there are the first resistance-increasing idlers, on the first cross beam, there are two variable-speed idlers, and on the second cross beam, there are two second resistance-increasing idlers; Between the first resistance-increasing idler and the second resistance-increasing idler, there is a conveyor belt; The first belt is connected to a conveyor belt; the middle of the variable-speed idler is thick and both ends are thin.

2. The belt-type passive resistor for a belt conveyor according to claim 1, characterized in that, The variable-speed idler and the first resistance-increasing idler are connected by two second belts.

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