A head wheel blocking alarm device for a belt conveyor

Abstract

The application provides a belt conveyor head wheel blockage alarm device, and relates to the technical field of belt conveyors, comprising a belt conveyor body, characterized in that: it further comprises a trigger mechanism and an audible and visual alarm, the trigger mechanism comprises a mounting bracket, a touch switch and an elastic touch component, the mounting bracket is arranged on one side close to the head wheel of the belt conveyor body, the touch switch is arranged on the mounting bracket, and the elastic touch component is arranged on the mounting bracket and located between the load belt and the return belt of the belt conveyor body, and the touch switch is electrically connected with the audible and visual alarm, the utility model realizes blockage alarm through a mechanical trigger type structure, has simple overall structure, and reduces equipment manufacturing and maintenance costs; the elastic touch component is directly driven by the load belt under the pressure of blockage to trigger alarm, the response is timely, the trigger logic is intuitive, the head wheel blockage condition can be quickly fed back, the risk of equipment damage caused by blockage is reduced, and no additional power is needed, so that the cost is saved compared with the prior art.

Description

Technical Field

[0001] This application relates to the field of belt conveyor technology, and more specifically, to a belt conveyor head pulley blockage alarm device. Background Technology

[0002] The head pulley (drive roller) is the core of the power output of the belt conveyor. It plays an important role in driving the belt to move and realize the material conveying. Its working status is closely related to the overall operating efficiency of the machine.

[0003] In actual production, material blockage is prone to occur in the head pulley area due to complex material characteristics (such as high moisture content, high viscosity, and large impurities), fluctuations in feed rate (such as instantaneous overload), or equipment malfunctions (such as belt slippage or guide chute deformation). Specifically, material accumulates above the head pulley belt or forms a buildup below and around the head pulley, causing an imbalance in friction between the belt and the head pulley. This leads to belt misalignment, slippage, or even jamming. In severe cases, it can cause serious malfunctions such as overload and burnout of the head pulley motor or belt tearing, resulting in production line shutdown and increased maintenance costs.

[0004] Patent CN214778853U discloses a material blockage alarm device for a conveyor belt head pulley. When material enters the protective cover of the head pulley, the detection plate stops rotating due to the interference of the material. The blockage sensor detects that the detection plate has stopped rotating and controls the alarm bell to sound, promptly notifying the staff to make adjustments. This makes the conveyor belt and equipment less prone to failure, thus facilitating the conveying of materials.

[0005] However, the aforementioned conveyor belt head pulley blockage alarm device has a complex structure, and its operation relies on the continuous online operation of the rotating motor. Specifically, to ensure the continuity and effectiveness of signal acquisition, even when the conveyor belt is operating under low load or during brief periods of no load, the rotating motor still needs to maintain a high operating power. This not only increases equipment maintenance costs but also consumes a large amount of additional electrical energy due to the motor's continuous high-power operation, resulting in energy waste. Summary of the Invention

[0006] The purpose of this application is to provide a conveyor belt head pulley blockage alarm device, which can solve the technical problems of existing conveyor belt head pulley blockage alarm devices having complex structures and requiring a rotating motor to be online for a long time, which increases both maintenance costs and power consumption.

[0007] This application provides a material blockage alarm device for the head pulley of a belt conveyor, including a belt conveyor body, a triggering mechanism, and an audible and visual alarm. The triggering mechanism includes a mounting frame, a touch switch, and a resilient touch component. The mounting frame is located near the head pulley of the belt conveyor body. The touch switch is mounted on the mounting frame. The resilient touch component is mounted on the mounting frame and located between the carrying belt and the return belt of the belt conveyor body. The touch switch is electrically connected to the audible and visual alarm. When material blockage occurs at the head pulley of the belt conveyor body, the carrying belt of the belt conveyor body is subjected to pressure from the accumulated material, which acts on the resilient touch component, causing the resilient touch component to move downward. The touch switch is triggered, and the audible and visual alarm is activated.

[0008] Furthermore, the elastic touch assembly includes a guide rod, a spring, and a touch rod. The mounting bracket has a guide hole adapted to the guide rod, and the guide rod movably passes through the guide hole. The guide rod has a first limiting ring and a second limiting ring arranged sequentially from top to bottom. The first limiting ring and the second limiting ring are respectively located on both sides of the guide hole. The spring is sleeved on the guide rod and located between the first limiting ring and the mounting bracket. The touch rod is fixed to one side of the guide rod and located above the touch switch.

[0009] Furthermore, a connecting frame is fixedly provided at the upper end of the guide rod, and a pressure roller is rotatably arranged on the connecting frame. The roller surface of the pressure roller is in rolling connection with the carrying belt of the belt conveyor body.

[0010] Furthermore, a rubber sleeve is fitted onto the touch rod.

[0011] Furthermore, the bottom of the mounting bracket is provided with a telescopic support assembly.

[0012] Furthermore, the telescopic support assembly includes a support fixing plate, a fixed cylinder, a movable cylinder, and a limiting pin. The fixed cylinder is fixed on the support fixing plate, and the movable cylinder is movably inserted into the fixed cylinder. The fixed cylinder has a plurality of first insertion holes along the vertical direction, and the movable cylinder has a second insertion hole corresponding to the first insertion holes. The limiting pin is inserted and removed into the first insertion hole and the second insertion hole.

[0013] Furthermore, the support plate is provided with multiple fixing holes.

[0014] Furthermore, the mounting bracket is equipped with a sensor located below the touch rod, and the sensor is electrically connected to a controller, which is electrically connected to the drive motor of the belt conveyor body.

[0015] The beneficial effects of this utility model are:

[0016] This invention achieves a material blockage alarm through a mechanical trigger structure. The overall structure is simple, using basic components such as touch switches and elastic touch components, which reduces the manufacturing and maintenance costs of the equipment. The pressure of the material blockage on the carrying belt directly drives the elastic touch component to trigger the alarm, providing timely response and intuitive triggering logic. It can quickly provide feedback on the material blockage of the head wheel, reducing the risk of equipment damage caused by material blockage. At the same time, no additional power is required, saving costs compared with existing technologies. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 These are schematic diagrams of structures in some embodiments of this application;

[0019] Figure 2 These are front views of some embodiments of this application;

[0020] Figure 3 This is a right view of the triggering mechanism in some embodiments of this application;

[0021] The reference numerals in the attached figures are as follows:

[0022] 1. Belt conveyor body; 2. Triggering mechanism; 21. Mounting bracket; 22. Touch switch; 23. Elastic touch assembly; 231. Guide rod; 232. Spring; 233. Touch rod; 3. First limit ring; 4. Second limit ring; 5. Connecting frame; 6. Pressure roller; 7. Rubber sleeve; 8. Telescopic support assembly; 81. Support fixing plate; 82. Fixing cylinder; 821. First insertion hole; 83. Movable cylinder; 84. Limit pin; 9. Fixing hole; 10. Sensor. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Specific implementation examples:

[0030] like Figure 1-3As shown, this application provides a belt conveyor head pulley blockage alarm device, including a belt conveyor body 1, a triggering mechanism 2, and an audible and visual alarm (not shown in the figure). The triggering mechanism 2 includes a mounting frame 21, a touch switch 22, and an elastic touch component 23. The mounting frame 21 is located near the head pulley of the belt conveyor body 1. The touch switch 22 is mounted on the mounting frame 21. The elastic touch component 23 is mounted on the mounting frame 21 and located between the carrying belt and the return belt of the belt conveyor body 1. The touch switch 22 is electrically connected to the audible and visual alarm. When blockage occurs at the head pulley of the belt conveyor body 1, the carrying belt of the belt conveyor body 1 is subjected to pressure from the accumulated material, which acts on the elastic touch component 23, causing the elastic touch component 23 to move downward. The touch switch 22 is triggered, controlling the audible and visual alarm to start. When blockage occurs at the head pulley of the belt conveyor body 1, the accumulated material will impact the belt conveyor... The bearing belt of the main body 1 generates downward pressure, which is transmitted to the elastic contact component 23 located between the bearing belt and the return belt. This causes the elastic contact component 23 to displace downward, thereby triggering the touch switch 22 mounted on the mounting bracket 21. Since the touch switch 22 is electrically connected to the audible and visual alarm, the triggering of the touch switch 22 will control the audible and visual alarm to start, thereby issuing an alarm signal to remind the staff to deal with it in time. The alarm device of this application realizes the material blockage alarm through a mechanical trigger structure. The overall structure is simple, using basic components such as the touch switch 22 and the elastic contact component 23, which reduces the equipment manufacturing and maintenance costs. The pressure of the bearing belt under the blockage directly drives the elastic contact component 23 to trigger the alarm, which has a timely response and intuitive triggering logic. It can quickly provide feedback on the blockage of the head wheel and reduce the risk of equipment damage caused by blockage. At the same time, no additional power is required, which saves costs compared with the prior art.

[0031] like Figure 1-3As shown, the elastic touch assembly 23 includes a guide rod 231, a spring 232, and a touch rod 233. The mounting bracket 21 has a guide hole adapted to the guide rod 231, through which the guide rod 231 movably passes. A first limiting ring 3 and a second limiting ring 4 are sequentially arranged on the guide rod 231 from top to bottom, located on opposite sides of the guide hole. The spring 232 is sleeved on the guide rod 231 and located between the first limiting ring 3 and the mounting bracket 21. The touch rod 233 is fixed to one side of the guide rod 231 and located above the touch switch 22. The elastic touch assembly 23 achieves vertical movement through the cooperation of the guide rod 231 and the guide hole of the mounting bracket 21. Stable movement: When the carrying belt of the conveyor body 1 is subjected to downward pressure due to material blockage, the touch rod 233 moves down synchronously with the guide rod 231. The spring 232 is compressed by the first limiting ring 3. During the downward movement, the touch rod 233 triggers the touch switch 22 below, starting the alarm. When the blockage is cleared, the return force of the spring 232 pushes the first limiting ring 3 up, causing the guide rod 231 and the touch rod 233 to rise back. The touch rod 233 separates from the touch switch 22, and the alarm stops. The first limiting ring 3 and the second limiting ring 4 limit the vertical displacement of the guide rod 231, preventing the guide rod 231 from falling out of the guide hole or moving down excessively, ensuring stable operation of the component.

[0032] like Figure 2 and Figure 3 As shown, a connecting frame 5 is fixedly provided at the upper end of the guide rod 231, and a pressure roller 6 is rotatably provided on the connecting frame 5. The roller surface of the pressure roller 6 is in rolling connection with the carrying belt of the belt conveyor body 1. When the carrying belt of the belt conveyor body 1 is pressed down by the accumulated material due to the blockage of the head pulley, the pressure is transmitted to the connecting frame 5 through the pressure roller 6, which in turn drives the guide rod 231 to move downward, causing the elastic contact component 23 to trigger the contact switch 22. When the carrying belt of the belt conveyor body 1 is running normally, the setting of the pressure roller 6 can reduce the frictional damage to the carrying belt. The guide rod 231 is only displaced by mechanical transmission when the carrying belt is pressed down.

[0033] like Figure 3 As shown, a rubber sleeve 7 is fitted on the touch rod 233; specifically, the touch rod 233 is an arc-shaped rod, and rubber sleeves 7 are fitted on both ends of the touch rod 233. When the elastic touch component 23 moves down due to the pressure of the blockage material, the rubber sleeve 7 moves synchronously with the touch rod 233 and impacts the touch switch 22. The deformation of the rubber sleeve 7 buffers the impact force, realizing the flexible triggering of the touch switch 22, ensuring reliable operation of the switch while avoiding damage caused by rigid contact.

[0034] like Figure 1-3 As shown, the bottom of the mounting frame 21 is provided with a telescopic support assembly 8; the telescopic support assembly 8 can flexibly adjust the height of the mounting frame 21, so that the device can be adapted to belt conveyors of different models (heights) and improve versatility.

[0035] like Figure 1-3 As shown, the telescopic support assembly 8 includes a support fixing plate 81, a fixed cylinder 82, a movable cylinder 83, and a limiting pin 84. The fixed cylinder 82 is fixed on the support fixing plate 81, and the movable cylinder 83 is movably inserted into the fixed cylinder 82. The fixed cylinder 82 has multiple first insertion holes 821 along the vertical direction, and the movable cylinder 83 has a second insertion hole (not shown in the figure) corresponding to the first insertion holes 821. The limiting pin 84 is inserted and removed into the first insertion hole 821 and the second insertion hole. The telescopic support assembly 8 achieves height adjustment by inserting and removing the movable cylinder 83 into the fixed cylinder 82: during adjustment, the limiting pin 84 is pulled out, the movable cylinder 83 is moved vertically along the fixed cylinder 82 to the target height, so that the second insertion hole of the movable cylinder 83 is aligned with the first insertion hole 821 at the corresponding position of the fixed cylinder 82, and then the limiting pin 84 is inserted through the two insertion holes to fix the relative position of the movable cylinder 83 and the fixed cylinder 82, thereby adjusting the overall height of the mounting frame 21.

[0036] like Figure 1-3 As shown, the support fixing plate 81 is provided with multiple fixing holes 9; the multiple fixing holes 9 on the support fixing plate 81 are used to fix the entire telescopic support assembly 8 to the ground, conveyor frame and other basic structures by means of bolts, expansion screws and other connecting parts, so as to ensure the stability of the position of the support fixing plate 81.

[0037] like Figure 3 As shown, a sensor 10 is installed on the mounting bracket 21. The sensor 10 is located below the touch rod 233. Specifically, the sensor 10 is positioned opposite to the touch switch 22. The sensor 10 is electrically connected to a controller (not shown in the figure), and the controller is electrically connected to the drive motor of the belt conveyor body 1. When the head pulley of the belt conveyor is blocked, causing the carrying belt to press down on the elastic touch component 23, the touch rod 233 moves down with the guide rod 231 and triggers the sensor 10. The sensor 10 transmits a signal to the controller. After receiving the signal, the controller controls the drive motor of the belt conveyor body 1 to perform a stop operation, realizing automatic linkage control after the blockage, and avoiding the continuous aggravation of the blockage leading to equipment damage.

[0038] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A belt conveyor head pulley blockage alarm device, comprising a belt conveyor body, characterized in that: It also includes a triggering mechanism and an audible and visual alarm. The triggering mechanism includes a mounting bracket, a touch switch, and a resilient touch component. The mounting bracket is located near the head pulley of the belt conveyor body. The touch switch is mounted on the mounting bracket. The resilient touch component is mounted on the mounting bracket and located between the carrying belt and the return belt of the belt conveyor body. The touch switch is electrically connected to the audible and visual alarm. When the head pulley of the belt conveyor body becomes clogged, the carrying belt of the belt conveyor body is subjected to the pressure of the accumulated material, which acts on the resilient touch component, causing the resilient touch component to move downward. The touch switch is then triggered, controlling the audible and visual alarm to start.

2. The belt conveyor head pulley blockage alarm device according to claim 1, characterized in that: The elastic touch assembly includes a guide rod, a spring, and a touch rod. The mounting bracket has a guide hole adapted to the guide rod, and the guide rod movably passes through the guide hole. The guide rod has a first limiting ring and a second limiting ring arranged sequentially from top to bottom. The first limiting ring and the second limiting ring are respectively located on both sides of the guide hole. The spring is sleeved on the guide rod and located between the first limiting ring and the mounting bracket. The touch rod is fixed to one side of the guide rod and located above the touch switch.

3. The belt conveyor head pulley blockage alarm device according to claim 2, characterized in that: A connecting frame is fixedly provided at the upper end of the guide rod, and a pressure roller is rotatably provided on the connecting frame. The roller surface of the pressure roller is in rolling connection with the carrying belt of the belt conveyor body.

4. The belt conveyor head pulley blockage alarm device according to claim 3, characterized in that: The touch rod is fitted with a rubber sleeve.

5. The belt conveyor head pulley blockage alarm device according to claim 1, characterized in that: The mounting bracket is equipped with a telescopic support assembly at its bottom.

6. The belt conveyor head pulley blockage alarm device according to claim 5, characterized in that: The telescopic support assembly includes a support fixing plate, a fixed cylinder, a movable cylinder, and a limiting pin. The fixed cylinder is fixed on the support fixing plate, and the movable cylinder is movably inserted into the fixed cylinder. The fixed cylinder has a plurality of first insertion holes along the vertical direction, and the movable cylinder has a second insertion hole corresponding to the first insertion holes. The limiting pin is inserted and removed into the first insertion hole and the second insertion hole.

7. The belt conveyor head pulley blockage alarm device according to claim 6, characterized in that: The support plate has multiple fixing holes.

8. The belt conveyor head pulley blockage alarm device according to claim 4, characterized in that: The mounting bracket is equipped with a sensor located below the touch rod. The sensor is electrically connected to a controller, which is electrically connected to the drive motor of the belt conveyor body.

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