Belt conveyor capable of automatically adjusting rotating speed

Abstract

The belt conveyor capable of automatically adjusting the rotating speed comprises a head wheel, a tail wheel, a belt, a frequency converter, a motor, a first proximity switch and a fixing support, the belt is arranged on the outer sides of the head wheel and the tail wheel in a sleeved mode, an output shaft of the motor is connected with the head wheel, the fixing support is installed on the side face of the belt, and a rotating rod is installed at the top end of the fixing support. A first proximity switch is installed on the fixing support, the rotating rod is driven to rotate when materials pass through the belt, the rotating rod shields signals of the first proximity switch so as to trigger the first proximity switch, the frequency converter is electrically connected with the motor and the first proximity switch, and whether the materials pass through the frequency converter to control the rotating speed of the motor or not is determined according to the first proximity switch. According to the belt conveyor capable of automatically adjusting the rotating speed, whether materials exist on the belt or not is detected through the first proximity switch, then the rotating speed of the motor is adjusted through the frequency converter, and therefore the situation that the motor works all the time when no materials are conveyed is avoided, energy conservation and consumption reduction are conducted on the conveyor, and meanwhile equipment abrasion can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of conveyors, in particular to a belt conveyor capable of automatically adjusting the rotation speed. Background Art

[0002] Under the goal of "carbon peak and carbon neutrality", energy conservation and consumption reduction cannot be delayed. Global warming is the consequence of climate change caused by human behavior. With human activities, global warming is also affecting people's lifestyles and bringing many problems. As a traditional manufacturing industry, the cement building materials industry has developed to date. Under the premise of ensuring quality and safety, reducing costs is also an urgent problem to be solved. Transformation and transformation is imperative.

[0003] At present, materials enter the belt conveyor through the hopper, and the computer directly controls the belt conveyor motor, so that the motor drives the reducer to rotate, and finally the head wheel makes the belt run at full speed, thereby driving the materials forward. However, in actual use, materials do not pass through the belt conveyor 24 hours a day. When the belt conveyor is unloaded, it still runs at full speed, causing power waste and increasing mechanical wear of related equipment. Utility Model Content

[0004] The main purpose of the utility model is to provide a belt conveyor with automatic speed adjustment, which aims to automatically reduce the speed of the conveyor when there is no material on the conveyor to achieve the purpose of energy saving and consumption reduction.

[0005] To achieve the above object, the utility model provides a belt conveyor with automatic speed adjustment, comprising a head wheel, a tail wheel, a belt, a frequency converter, a motor, a first proximity switch and a fixed bracket, wherein:

[0006] The belt is sleeved on the outside of the head wheel and the tail wheel, the output shaft of the motor is connected to the head wheel, a fixed bracket is installed on the side of the belt, a rotating rod hinged to the fixed bracket is installed on the top of the fixed bracket, and a first proximity switch is installed on the fixed bracket. When material passes on the belt, the rotating rod is driven to rotate, and the rotating rod blocks the signal of the first proximity switch to trigger the first proximity switch. The frequency converter is electrically connected to the motor and the first proximity switch, and the speed of the motor is controlled according to the first proximity switch to determine whether material passes through the frequency converter.

[0007] Preferably, a reducer is provided between the output shaft of the motor and the head wheel.

[0008] Preferably, the belt conveyor with automatic speed adjustment further comprises a timer electrically connected to the frequency converter.

[0009] Preferably, a second proximity switch is fixed next to the tail wheel to detect whether it is slipping, and the second proximity switch is electrically connected to the frequency converter.

[0010] Preferably, a fixed base is provided on the side of the tail wheel, a baffle is welded on the side of the tail wheel, a second proximity switch is fixed on the side of the fixed base to detect whether the tail wheel is slipping, the second proximity switch is electrically connected to the frequency converter, and when the tail wheel rotates, the baffle blocks the signal of the second proximity switch, thereby triggering the second proximity switch.

[0011] Preferably, the belt conveyor with automatic speed adjustment further comprises an alarm electrically connected to the second proximity switch.

[0012] Preferably, a flexible buffer pad is sleeved on the free end of the rotating rod.

[0013] Preferably, the distance between the bottom end of the inclined rod and the upper surface of the belt is 10 mm to 50 mm.

[0014] Preferably, the fixed bracket is located between the head wheel and the hopper for placing materials.

[0015] Preferably, the rotating rod is connected to the fixed bracket via an elastic member to reset it.

[0016] The belt conveyor with automatic speed adjustment proposed by the utility model detects whether there is material on the belt through the first proximity switch, and then adjusts the speed of the motor through the frequency converter, so as to avoid the situation where the motor keeps working when there is no material to be transported, thereby effectively realizing energy saving and consumption reduction of the conveyor, and at the same time reducing equipment wear. Furthermore, the belt conveyor with automatic speed adjustment has the advantages of simple structure, easy implementation and stable and reliable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a preferred embodiment of the belt conveyor with automatic speed adjustment of the utility model;

[0018] Figure 2 It is a partial structural schematic diagram of the belt conveyor with automatic speed adjustment of the utility model;

[0019] Figure 3 It is a side structural schematic diagram of the belt conveyor with automatic speed adjustment of the utility model.

[0020] In the figure, 1. first proximity switch, 2. second proximity switch, 3. tail wheel, 31. baffle, 4. hopper, 5. fixed bracket, 51. rotating rod, 52. flexible buffer pad, 6. head wheel, 7. reducer, 8. motor, 9. belt, 10. fixed base.

[0021] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] It should be noted that in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] Reference Figures 1 to 3 In the preferred embodiment, a belt conveyor with automatic speed adjustment includes a head wheel 6, a tail wheel 3, a belt 9, a frequency converter, a motor 8, a first proximity switch 1 and a fixed bracket 5, wherein:

[0025] The belt 9 is sleeved on the outside of the head wheel 6 and the tail wheel 3, the output shaft of the motor 8 is connected to the head wheel 6 to drive it to rotate, a fixed bracket 5 is installed on the side of the belt 9, a rotating rod 51 hinged to the fixed bracket 5 is installed on the top of the fixed bracket 5, and a first proximity switch 1 is fixedly installed on the fixed bracket 5. When material passes through the belt 9, the rotating rod 51 is driven to rotate, and the rotating rod 51 blocks the signal of the first proximity switch 1, thereby triggering the first proximity switch 1. The frequency converter is electrically connected to the motor and the first proximity switch 1, and the speed of the motor is controlled according to whether there is material passing through the frequency converter according to the first proximity switch 1.

[0026] The top of the fixed bracket 5 may be provided with a through hole, and the pin shaft passes through the through hole and the round hole at the head of the rotating rod 51 to achieve hinged connection between the two. The frequency converter may be installed in an electrical room. The circuit connection method and control method of the frequency converter, the motor 8 and the first proximity switch 1 are common technologies in the prior art, and will not be described in detail in this embodiment.

[0027] Furthermore, a speed reducer 7 is provided between the output shaft of the motor 8 and the head wheel 6. The belt conveyor with automatic speed adjustment also includes a timer electrically connected to the frequency converter. The timer will reset the time according to the signal of the first proximity switch 1, and the frequency converter will make corresponding settings (adjust the speed of the motor 8) according to the time change of the timer.

[0028] Furthermore, a second proximity switch 2 is fixed beside the tail wheel 3 to detect whether it is slipping, and the second proximity switch 2 is electrically connected to the frequency converter.

[0029] Specifically, a fixed base 10 is provided on the side of the tail wheel 3, a baffle 31 is welded on the side of the tail wheel 3, a second proximity switch 2 is fixed on the side of the fixed base 10 to detect whether the tail wheel 3 is slipping, and the second proximity switch 2 is electrically connected to the inverter. When the tail wheel 3 rotates, the baffle 31 blocks the signal of the second proximity switch 2, thereby triggering the second proximity switch 2.

[0030] Every time the tail wheel 3 rotates one circle, the baffle 31 rotates one circle, thereby triggering the second proximity switch 2 once. The second proximity switch determines whether the tail wheel 3 is slipping according to whether the baffle 31 rotates.

[0031] When the belt 9 slips, the tail wheel 3 stops rotating and stops triggering the second proximity switch 2. The second proximity switch 2 sends a signal to stop the inverter-controlled motor 8, thereby preventing the belt 9 from burning due to idling of the head wheel 6, thereby ensuring the safety of the conveyor.

[0032] Furthermore, the belt conveyor with automatic speed adjustment also includes an alarm device electrically connected to the second proximity switch 2. When the second proximity switch 2 detects that the tail wheel 3 is slipping, the alarm device can be used to alert the user. The alarm device can be used in the form of sound, light, etc., which is not limited in the present invention.

[0033] In this embodiment, a flexible buffer pad 52 is sleeved on the free end of the rotating rod 51. The flexible buffer pad 52 can be made of conventional plastic pads, as long as it protects the end of the rotating rod 51. When the rotating rod 51 is not rotating, the distance between the bottom end of the free end of the rotating rod 51 and the upper surface of the belt 9 is 10 mm to 50 mm.

[0034] In this embodiment, the fixed bracket 5 is located between the head wheel 6 and the hopper 4 for placing materials.

[0035] The rotating rod 51 is connected to the fixed bracket 5 through an elastic member to reset it. The elastic member can be a spring, such as one end of the spring is fixed to the middle of the fixed bracket 5, and the other end is fixed to the middle of the rotating rod 51.

[0036] The working process of the belt conveyor with automatic speed regulation is as follows: when the material in the hopper 4 enters the belt 9, it touches the rotating rod 51, and then the rotating rod 51 rotates relative to the fixed bracket 5. After the rotation, the rotating rod 51 covers the signal of the first proximity switch 1, thereby triggering the first proximity switch 1, so that the frequency converter controls the motor 8 to accelerate the operation, and the timer starts to count down at the same time. The timer will continuously re-time according to the signal of the first proximity switch 1; when there is no material entering the hopper 4, the rotating rod 51 is restored to its position under the action of the elastic member. At this time, the first proximity switch 1 cannot be triggered. After the timer continues to count to the set value, the frequency converter is controlled to reduce the speed of the motor 8, and the speed values ​​of the reducer 7, the head wheel 6 and the belt 9 are reduced in turn, so as to achieve the purpose of energy saving and consumption reduction and reduce mechanical wear.

[0037] When the belt 9 slips, the tail wheel 3 stops rotating and stops triggering the second proximity switch 2. A signal is sent through the second proximity switch 2 to stop the inverter-controlled motor 8 from running, so as to prevent the head wheel 6 from idling and burning the conveyor belt 9, thereby ensuring the safety of the conveyor equipment.

[0038] The belt conveyor with automatic speed adjustment proposed in this embodiment detects whether there is material on the belt 9 through the first proximity switch 1, and then adjusts the speed of the motor 8 through the frequency converter, so as to avoid the situation where the motor 8 is always working when there is no material to be transported, thereby effectively realizing energy saving and consumption reduction of the conveyor, and reducing equipment wear. Furthermore, the belt conveyor with automatic speed adjustment has the advantages of simple structure, easy implementation and stable and reliable operation.

[0039] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A belt conveyor with automatic speed adjustment, characterized in that: It includes a head wheel, a tail wheel, a belt, a frequency converter, a motor, a first proximity switch and a fixed bracket, wherein: The belt is sleeved on the outside of the head wheel and the tail wheel, the output shaft of the motor is connected to the head wheel, a fixed bracket is installed on the side of the belt, a rotating rod hinged to the fixed bracket is installed on the top of the fixed bracket, and a first proximity switch is installed on the fixed bracket. When material passes on the belt, the rotating rod is driven to rotate, and the rotating rod blocks the signal of the first proximity switch to trigger the first proximity switch. The frequency converter is electrically connected to the motor and the first proximity switch, and the speed of the motor is controlled according to the first proximity switch to determine whether material passes through the frequency converter.

2. The belt conveyor with automatic speed adjustment according to claim 1, characterized in that: A reducer is arranged between the output shaft of the motor and the head wheel.

3. The belt conveyor with automatic speed adjustment according to claim 1, characterized in that: Also included is a timer electrically connected to the frequency converter.

4. The belt conveyor with automatic speed adjustment according to claim 1, characterized in that: A second proximity switch is fixed beside the tail wheel to detect whether the tail wheel is slipping, and the second proximity switch is electrically connected to the frequency converter.

5. The belt conveyor with automatic speed adjustment according to claim 4, characterized in that: A fixed base is provided on the side of the tail wheel, a baffle is welded on the side of the tail wheel, and a second proximity switch is fixed on the side of the fixed base to detect whether the tail wheel is slipping. When the tail wheel rotates, the baffle blocks the signal of the second proximity switch, thereby triggering the second proximity switch.

6. The belt conveyor with automatic speed adjustment according to claim 5, characterized in that: Also included is an alarm electrically connected to the second proximity switch.

7. The belt conveyor with automatic speed adjustment according to claim 6, characterized in that: A flexible buffer pad is sleeved on the free end of the rotating rod.

8. The belt conveyor with automatic speed adjustment according to claim 7, characterized in that: The distance between the bottom end of the free end of the rotating rod and the upper surface of the belt is 10 mm to 50 mm.

9. The belt conveyor with automatic speed adjustment according to claim 1, characterized in that: The fixed bracket is located between the head wheel and the hopper for placing materials.

10. The belt conveyor with automatic speed adjustment according to any one of claims 1 to 9, characterized in that: The rotating rod is connected to the fixing bracket through an elastic member so as to reset the rotating rod.

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