Belt conveyor running speed detection device

Abstract

The utility model discloses a belt conveyor running speed detection device which is characterized in that a detection device is arranged between belts, the detection device is connected between supporting frames through a cross beam and located in the middle of the belts, when the detection device is located at the initial position, rollers make contact with the bottom ends of the belts to roll, the belts are prevented from being scratched, a gap is reserved between a pressing rod and an air bag, and the pressing rod does not make direct contact with the air bag; when the belt is loaded, the weight on the belt enables the belt to press downwards, so that the connecting column is pressed downwards, the connecting column drives the pressing rod to press downwards, the pressing rod further drives the pressing plate to press the air bag downwards, the air bag exhausts air in the air bag through the air outlet pipe, and meanwhile the flow sensor monitors the flow change of the air outlet pipe. The data are transmitted to the terminal through the signal transmitter, the system then adjusts the running speed of the belt conveyor according to the information so as to avoid damage caused by the fact that the speed of the belt conveyor is too high when the load is too large, and meanwhile the system can slow down the running speed when the load is light or empty.

Description

Technical Field

[0001] The utility model relates to the technical field of belt conveyor equipment, in particular to a belt conveyor running speed detection device. Background Art

[0002] Belt conveyors can transport materials continuously and efficiently, especially in long-distance and large-volume transportation situations. Compared with manual handling or other modes of transportation, belt conveyors significantly improve the speed and efficiency of material transfer and are suitable for many industries such as mining, manufacturing, and chemical industry. Belt conveyors usually operate at a set speed. However, when the load is light or there is no load, the equipment still runs at a relatively high speed. This situation will lead to a significant increase in the waste of electrical energy. Running too fast not only causes waste of electrical energy, but also aggravates the wear of the belt conveyor transmission system, rotating parts and belts. When the equipment runs at an unnecessary high speed, the wear rate of parts is significantly accelerated, increasing the maintenance frequency and repair cost of the equipment. This ineffective wear not only shortens the service life of the equipment, but also causes shutdowns or failures, thereby affecting the continuity of production. Especially under heavy loads, running too fast causes the belt conveyor to carry too much coal, causing belt pressure and even equipment shutdown. Overload not only affects production efficiency, but also causes serious damage to the equipment. Utility Model Content

[0003] The purpose of the utility model is to provide a belt conveyor running speed detection device to solve the problem that when the load is light or there is no load, the equipment still runs at a relatively high speed, which will lead to a significant increase in the waste of electric energy and aggravate the wear of the belt conveyor transmission system, rotating parts and belts. When the load is heavy, the running speed is too fast, resulting in an excessive amount of coal on the belt conveyor, causing the belt to be loaded.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a belt conveyor running speed detection device, based on PLC control, including a detection device, a crossbeam, and a clamping device. The crossbeam is evenly distributed between the two support frames of the belt conveyor and is located between the belts. Both side ends are connected to the support frames respectively. The crossbeam is connected to the clamping device, and the clamping device is connected to the detection device.

[0005] The detection device includes an outer shell, a connecting column, a lower pressure rod, a return spring, an airbag shell, and an airbag. The outer shell is a hollow shell with a rectangular opening upward. The bottom end of the outer shell is connected to the airbag shell, and the airbag is accommodated in the airbag shell. A positioning through hole is provided at the bottom end of the inner wall of the outer shell. A connecting column is provided in the outer shell. The connecting column is slidably fitted in the outer shell. A groove is provided at the top end of the connecting column and the contact end of the belt. A roller is connected in the groove. The top end of the roller contacts the bottom end of the belt. The bottom end of the connecting column is connected to a lower pressure rod at the position corresponding to the positioning through hole. The lower pressure rod passes through the bottom end of the outer shell and is arranged in the airbag shell. The bottom end of the lower pressure rod is connected to a lower pressure plate, and a distance is left between the airbag and the connecting column. A return spring is provided between the connecting column and the bottom end of the inner wall of the outer shell. The return spring is sleeved on the lower pressure rod, and one end contacts the bottom end of the connecting column, and the other end contacts the bottom end of the inner wall of the outer shell.

[0006] Preferably, one end of the airbag shell is connected to an air inlet pipe, and the other end is connected to an air outlet pipe, and the air inlet pipe and the air outlet pipe respectively pass through the airbag shell, one end of the air inlet pipe is connected to an electric valve, and one end of the air outlet pipe is connected to a flow sensor, and the flow sensor is connected to the airbag shell.

[0007] Preferably, it further comprises a plurality of rollers evenly distributed on the top of the support frame, with belts draped over the rollers, and the detection device is located between the rollers.

[0008] Preferably, the clamping device includes a fixed claw, a movable claw, and a connecting spring. The fixed claw is connected to the outer shell, a sliding groove is provided on the fixed claw, a movable claw is provided in the sliding groove, the movable claw slides with the fixed claw, and a number of connecting springs are provided between the movable claw and the sliding groove. One end of the connecting spring is connected to the bottom end of the movable claw, and the other end is connected to the bottom end of the inner wall of the fixed claw sliding groove.

[0009] Preferably, the fixed claw and the movable claw are both L-shaped, with the vertical end fitting against the vertical end of the beam and the horizontal end fitting against the upper and lower ends of the beam.

[0010] Preferably, it also includes a signal transmitter, which is arranged on the flow sensor and is used to transmit the flow rate at the air outlet end of the airbag detected by the flow sensor to control the speed of the belt conveyor.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] By setting a detection device between the belts, the detection device is connected between the support frames through a crossbeam and is located in the middle of the belt. In the initial position, the roller contacts and rolls with the bottom end of the belt to avoid scratching the belt. There is a gap between the pressure rod and the airbag, and there is no direct contact with the airbag. When the belt is loaded, the weight on the belt causes it to press down, thereby pressing down the connecting column, and the connecting column drives the pressure rod down, and the pressure rod further drives the pressure plate to apply downward pressure to the airbag. The airbag discharges the internal gas through the outlet pipe. At the same time, the flow sensor monitors the flow changes of the outlet pipe and sends the data to the terminal through the signal transmitter. Based on this information, the system then adjusts the running speed of the belt conveyor to avoid damage caused by excessive speed of the belt conveyor when the load is too large. At the same time, when the load is light or empty, the system will slow down the running speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] Figure 2 This is a schematic structural diagram of the detection device of the present utility model.

[0015] Figure 3 This is a schematic diagram of the structure in which the connecting column, the lower pressure rod and the return spring cooperate with each other in the present invention.

[0016] Figure 4 This is a schematic structural diagram of the clamping device of the present utility model.

[0017] In the figure: 1. Support frame; 2. Belt; 3. Detection device; 301. Housing; 302. Connecting column; 303. Roller; 304. Press-down rod; 305. Return spring; 306. Airbag housing; 307. Airbag; 308. Flow sensor; 4. Roller; 5. Crossbeam; 6. Clamping device; 601. Fixed claw; 602. Movable claw; 603. Connecting spring; 7. Electric valve. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figure 1-3 The utility model provides an embodiment: a belt conveyor running speed detection device, based on PLC control, including a detection device 3, a crossbeam 5, and a clamping device 6. The crossbeam 5 is evenly distributed between the two support frames 1 of the belt conveyor. The crossbeam 5 enhances the stability of the overall structure and provides an installation basis for the clamping device 6. At the same time, the clamping device 6 is used to fix or clamp the detection device 3 to ensure that it will not shift during operation, and is easy to install and disassemble. It is located between the belts 2, and the two side ends are respectively connected to the support frame 1. The support frame 1 supports the structure of the entire conveying system to provide stability and strength. The crossbeam 5 is connected to the clamping device 6, and the clamping device 6 is connected to the detection device 3.

[0023] The detection device 3 includes a shell 301, a connecting column 302, a downward pressure rod 304, a return spring 305, an airbag shell 306, and an airbag 307. The shell 301 is a hollow shell with a rectangular opening facing upward. The shell 301 protects the internal components and provides structural support. The bottom end of the shell 301 is connected to the airbag shell 306, and the airbag shell 306 accommodates the airbag 307. A positioning through hole is provided at the bottom end of the inner wall of the shell 301. A connecting column 302 is provided in the shell 301. The connecting column 302 transmits pressure to the downward pressure rod 304 to monitor the load condition of the belt 2. The connecting column 302 is slidably fitted in the shell 301. A groove is provided at the top of the connecting column 302 and the contact end of the belt 2. A roller 303 is connected in the groove. The roller 303 contacts the bottom end of the belt 2 to reduce The top of the roller 303 conflicts with the bottom end of the belt 2, and the bottom end of the connecting column 302 is connected to a lower pressure rod 304 corresponding to the positioning through hole. The lower pressure rod 304 responds to the load change of the belt 2 and drives the lower pressure plate to act on the airbag 307. The lower pressure rod 304 passes through the bottom end of the shell 301 and is arranged in the airbag shell 306. The bottom end of the lower pressure rod 304 is connected to the lower pressure plate, and a distance is left between the lower pressure rod 304 and the airbag 307. A reset spring 305 is provided between the connecting column 302 and the bottom end of the inner wall of the shell 301. The reset spring 305 ensures that the detection device 3 returns to its original position when there is no load and maintains sensitivity. The reset spring 305 is sleeved on the lower pressure rod 304, and one end conflicts with the bottom end of the connecting column 302, and the other end conflicts with the bottom end of the inner wall of the shell 301.

[0024] One end of the airbag shell 306 is connected to an air inlet pipe, and the other end is connected to an air outlet pipe, and the air inlet pipe and the air outlet pipe respectively pass through the airbag shell 306, one end of the air inlet pipe is connected to an electric valve 7, and one end of the air outlet pipe is connected to a flow sensor 308. The flow sensor 308 detects the outlet flow of the airbag 307 and feeds it back to the control system in real time to help adjust the speed of the belt conveyor. The flow sensor 308 is connected to the airbag shell 306, and the air inlet pipe and the air outlet pipe are used for gas input and output respectively. The air inlet pipe is connected to the electric valve 7 to control the gas inflow, and the air outlet pipe is connected to the flow sensor 308 to monitor the gas discharge, so that the flow change is transmitted to the terminal PLC through the signal transmitter to adjust the running speed of the belt conveyor.

[0025] It also includes a number of rollers 4, which are evenly distributed on the top of the support frame 1. The rollers 4 support the belt 2 and reduce friction to ensure smooth material transportation. The belt 2 is placed on the rollers 4, and the detection device 3 is located between the rollers 4.

[0026] It also includes a signal transmitter, which is arranged on the flow sensor 308 and is used to transmit the flow rate at the outlet of the air bag 307 detected by the flow sensor 308 to control the speed of the belt conveyor. The signal transmitter transmits the data of the flow sensor 308 to the PLC control system to realize automatic control.

[0027] In the initial position, the roller 303 rolls against the bottom end of the belt 2, and there is a gap between the lower pressure plate of the lower pressure rod 304 and the airbag 307. When there is material on the belt 2, the belt 2 deforms and presses down, pressing the roller 303 downward, and the roller 303 drives the connecting column 302 downward. The connecting column 302 squeezes the return spring 305, and at the same time, the lower pressure rod 304 drives the lower pressure plate to squeeze the airbag 307. The gas in the airbag 307 is discharged through the outlet pipe after being squeezed, and the flow sensor 308 monitors the flow change at the same time. The flow change is transmitted to the remote terminal PLC through the signal transmitter to reflect the load condition of the belt 2 and adjust the running speed of the belt conveyor.

[0028] Example 2: Please refer to Figure 4 , based on Example 1, further comprising the following structure:

[0029] The clamping device 6 includes a fixed claw 601, a movable claw 602, and a connecting spring 603. The fixed claw 601 is connected to the housing 301. A slide groove is provided on the fixed claw 601, and a movable claw 602 is provided in the slide groove. The fixed claw is the static part of the clamping device 601 and is responsible for fixing the clamping position. At the same time, the slide groove is provided so that the movable claw 602 can slide inside it to adjust the size of the clamping. The movable claw 602 slides in conjunction with the fixed claw 601. The movable claw 602 is the dynamic part of the clamping device 6 and can slide in the fixed claw 601 and approach the fixed claw 601. Or away from the object, thereby realizing the clamping or releasing function, a plurality of connecting springs 603 are provided between the movable claw 602 and the slide groove, one end of the connecting spring 603 is connected to the bottom end of the movable claw 602, and the other end is connected to the bottom end of the inner wall of the slide groove of the fixed claw 601. The connecting spring 603 is used to provide elasticity to ensure that the movable claw 602 can be maintained in a predetermined position when there is no external force, and to provide an inward clamping force when it is necessary to clamp an object, so that the movable claw 602 always passes through the tension of the connecting spring 603 when sliding, thereby improving the reliability and safety of clamping.

[0030] The fixed claw 601 and the movable claw 602 are both L-shaped, with the vertical end fitting the vertical end of the beam 5 and the horizontal end fitting the upper and lower ends of the beam 5. The L-shaped setting can better fit the shape of the clamped object and enhance the clamping effect.

[0031] The above is only an embodiment of the present invention, and common knowledge such as the specific structure and characteristics of the scheme are not described in detail here. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claim involved.

Claims

1. A belt conveyor speed detection device based on PLC control, characterized by: The invention comprises a detection device (3), a crossbeam (5), and a clamping device (6). The crossbeam (5) is evenly distributed between two support frames (1) of the belt conveyor and is located between the belts (2). Both side ends are connected to the support frames (1) respectively. The crossbeam (5) is connected to the clamping device (6), and the clamping device (6) is connected to the detection device (3). The detection device (3) includes a shell (301), a connecting column (302), a lower pressure rod (304), a return spring (305), an airbag shell (306), and an airbag (307). The shell (301) is a hollow shell with a rectangular opening facing upward. The bottom end of the shell (301) is connected to the airbag shell (306), and the airbag (307) is accommodated in the airbag shell (306). A positioning through hole is provided at the bottom end of the inner wall of the shell (301). A connecting column (302) is provided in the shell (301), and the connecting column (302) is slidably matched with the shell (301). A groove is provided at the top end of the connecting column (302) and the contact end of the belt (2). The roller (303) is provided with a top end of the roller (303) in contact with the bottom end of the belt (2). The bottom end of the connecting column (302) is connected to a pressing rod (304) at a position corresponding to the positioning through hole. The pressing rod (304) passes through the bottom end of the shell (301) and is arranged in the airbag shell (306). The bottom end of the pressing rod (304) is connected to a pressing plate, and a distance is left between the pressing rod (304) and the airbag (307). A return spring (305) is provided between the connecting column (302) and the bottom end of the inner wall of the shell (301). The return spring (305) is sleeved on the pressing rod (304), and one end of the pressing rod is in contact with the bottom end of the connecting column (302), and the other end of the pressing rod is in contact with the bottom end of the inner wall of the shell (301).

2. The belt conveyor running speed detection device according to claim 1, characterized in that: One end of the airbag shell (306) is connected to an air inlet pipe, and the other end is connected to an air outlet pipe, and the air inlet pipe and the air outlet pipe respectively pass through the airbag shell (306), one end of the air inlet pipe is connected to an electric valve (7), and one end of the air outlet pipe is connected to a flow sensor (308), and the flow sensor (308) is connected to the airbag shell (306).

3. The belt conveyor running speed detection device according to claim 1, characterized in that: It also includes a plurality of rollers (4) evenly distributed on the top of the support frame (1), a belt (2) is mounted on the rollers (4), and the detection device (3) is located between the rollers (4).

4. The belt conveyor running speed detection device according to claim 1, characterized in that: The clamping device (6) includes a fixed claw (601), a movable claw (602), and a connecting spring (603). The fixed claw (601) is connected to the housing (301). A sliding groove is provided on the fixed claw (601). A movable claw (602) is provided in the sliding groove. The movable claw (602) is slidably matched with the fixed claw (601). A plurality of connecting springs (603) are provided between the movable claw (602) and the sliding groove. One end of the connecting spring (603) is connected to the bottom end of the movable claw (602), and the other end is connected to the bottom end of the inner wall of the sliding groove of the fixed claw (601).

5. The belt conveyor running speed detection device according to claim 4, characterized in that: The fixed claw (601) and the movable claw (602) are both L-shaped, with the vertical ends being fitted to the vertical ends of the beam (5), and the horizontal ends being fitted to the upper and lower ends of the beam (5).

6. The belt conveyor running speed detection device according to claim 1, characterized in that: It also includes a signal transmitter, which is arranged on the flow sensor (308) and is used to transmit the flow rate at the outlet end of the air bag (307) detected by the flow sensor (308) to control the speed of the belt conveyor.

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