Roller screen slip detection and alarm system

Abstract

The utility model relates to the technical field of rubber-tyred drum screening machines, and discloses a roller screen slip detection alarm system which comprises a roller screen and a rack, a magnetic ring moving along with the surface of the roller screen is installed on the roller screen, and a proximity switch used for detecting a changing magnetic field, generating signals and sending the signals to an input port of a PLC module is installed on the rack. The PLC module executes logic in a program according to changes of input signals so as to judge whether the roller screen slips or not, if the roller screen rotates normally, the PLC module receives signals multiple times within a preset time, if the roller screen slips, the magnetic ring cannot normally trigger the proximity switch within the preset time, and consequently the PLC does not receive enough signals within the preset time, and the roller screen is driven to rotate normally. The PLC module judges that the roller screen slides and triggers the alarm module to give an alarm, the rotating state of the roller screen can be automatically monitored, dependence on manpower is reduced, and the problem of material blockage caused by sliding of the roller screen can be effectively solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of tire-type drum screening machines, and in particular relates to a roller screen skidding detection and alarm system. Background Art

[0002] The tire drum screening machine is a machine used to screen raw materials into particles of different sizes. It has the characteristics of strong mobility, easy operation and high efficiency. It is suitable for screening various materials, such as soil, sand, concrete, coal, ore, etc.

[0003] This type of tire-type drum screening machine that uses tire transmission often slips during operation. If the drum and the tire slip, it is difficult to ensure the smooth progress of the screening operation, and it will also affect the screening efficiency. Since slipping or other failures may cause material blockage, special personnel are required to monitor the site, which undoubtedly increases labor costs, affects the company's production costs and rhythm, and increases the labor intensity of operators. Utility Model Content

[0004] In order to make up for the shortcomings of the prior art and solve the problem that the roller and the tire slip and need special personnel to watch over, the utility model proposes a roller screen slip detection alarm system.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A rolling screen slippage detection and alarm system comprises a rolling screen supported by tires and a frame, the rolling screen is provided with a magnetic ring which moves along with the surface of the rolling screen, the frame is provided with a proximity switch which is used to detect the changing magnetic field and generate a signal to be sent to the input port of a PLC module, the PLC module executes the logic in the program according to the change of the input signal to determine whether the rolling screen is slipping.

[0007] Preferably, the rolling screen is provided with a mounting part which is fixedly installed in cooperation with the magnetic ring, and the mounting part includes a mounting frame which is threadedly connected to the rolling screen by bolts, an annular groove which is opened on the mounting frame and is embedded in cooperation with the magnetic ring, and a locking screw and a nut. After the locking screw passes through the circular through hole on the mounting frame, the magnetic ring is locked and positioned in the annular groove by the cooperation of the head on the locking screw and the nut.

[0008] Preferably, the proximity switch is fixed on a fixing frame, and the fixing frame is threadedly connected to the frame via bolts.

[0009] Preferably, the PLC module is electrically connected to the alarm module.

[0010] Preferably, when the magnetic ring is rotated to a position close to the switch, the close to switch senses the presence of the magnetic ring and sends a signal, which is transmitted to the PLC module through an electrical connection;

[0011] When the roller screen rotates normally, the magnetic ring approaches the switch several times within the predetermined time when the roller screen rotates one circle, and the PLC module receives several signals within the predetermined time;

[0012] When the roller screen slips, the magnetic ring cannot trigger the proximity switch normally within the preset time, resulting in the PLC module not receiving sufficient signals within the preset time. The PLC module determines that the roller screen is slipping and triggers the alarm module to alarm.

[0013] Preferably, the output signal of the proximity switch is transmitted to the input port of the PLC module via a cable or a wireless transmission module, depending on the site conditions and implementation requirements.

[0014] Compared with the prior art, the technical effects and advantages of the utility model are:

[0015] A roller screen slippage detection alarm system, a magnetic ring is installed on the surface of the roller screen, and moves with the rotation of the roller screen, and a proximity switch is installed on a frame. When the magnetic ring moves into the range of the proximity switch, the switch is triggered and sends a signal, and the sent signal is transmitted to the PLC module through an electrical connection. The PLC module determines whether the screen rotates normally based on the frequency and time of the received signal. If the roller screen rotates normally, the PLC module receives multiple signals within a predetermined time. If the roller screen slips, the magnetic ring cannot trigger the proximity switch normally within the predetermined time, resulting in the PLC not receiving enough signals within the predetermined time. The PLC module determines that the roller screen is slipping and triggers the alarm module to alarm.

[0016] The roller screen slippage detection alarm system can automatically monitor the rotation state of the roller screen, reducing dependence on manual labor. Once the roller screen slippage is detected, the system can immediately trigger an alarm to avoid or reduce production interruptions or equipment damage caused by slippage. By real-time monitoring and timely handling of slippage problems, the continuous operation time and production efficiency of the screening equipment can be improved. The system can help reduce equipment wear caused by slippage, thereby extending the service life of the equipment and reducing maintenance costs. Timely alarms can ensure the safety of operators and avoid potential dangers caused by failure to detect slippage in time.

[0017] The magnetic ring is stably fixed on the roller screen through the mounting frame, annular groove, locking screw and nut, which enhances the stability of the magnetic ring installation. Through the cooperation of the locking screw and the nut, the magnetic ring is accurately locked in the annular groove, ensuring the accurate position of the magnetic ring on the roller screen. This is conducive to the proximity switch to detect the position change of the magnetic ring, and then more accurately detect the slip phenomenon. Through the bolt thread connection, the fixing frame can be easily removed from the roller screen for easy maintenance and repair. The proximity switch is fixed on the frame to ensure that the position of the proximity switch and the roller screen remain relatively stable, thereby improving the accuracy of detection.

[0018] The roller screen skidding detection alarm system utilizes the existing PLC control system and adds a set of signal detection devices, namely proximity switches, to realize roller screen skidding detection alarm. The system is simple to implement and has low investment cost, and can effectively solve the problem of clogging caused by roller screen skidding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure in which the magnetic ring and the proximity switch of the utility model are arranged relatively;

[0021] Figure 3 It is a structural schematic diagram of the installation part of the utility model;

[0022] Figure 4 This is an exploded view of the mounting member of the utility model;

[0023] Figure 5 This is a system block diagram of the utility model.

[0024] In the figure: 1. rolling screen; 2. frame; 3. PLC module; 4. proximity switch; 5. magnetic ring; 6. mounting piece; 61. mounting frame; 62. annular groove; 63. locking screw; 64. nut; 65. circular through hole; 66. head; 7. fixing frame; 8. alarm module. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The following is combined with Figure 1-5 To further explain this application in detail,

[0027] An embodiment of the present application discloses a roller screen slippage detection alarm system, comprising a roller screen 1 supported by tires and a frame 2, the roller screen 1 being provided with a magnetic ring 5 that moves along with the surface of the roller screen 1, the frame 2 being provided with a proximity switch 4 that is used to detect changes in the magnetic field and generate a signal to be sent to an input port of a PLC module 3, the PLC module 3 executing logic in a program according to changes in the input signal to determine whether the roller screen 1 is slipping.

[0028] The PLC module 3 is electrically connected to the alarm module 8 .

[0029] When the magnetic ring 5 turns to a position close to the switch 4, the close to the switch 4 senses the existence of the magnetic ring 5 and sends a signal, which is transmitted to the PLC module 3 through an electrical connection;

[0030] When the roller screen 1 rotates normally, the magnetic ring 5 approaches the switch 4 several times within the predetermined time when the roller screen 1 rotates one circle, and the PLC module 3 receives several signals within the predetermined time;

[0031] When the roller screen 1 slips, the magnetic ring 5 cannot normally trigger the proximity switch 4 within the predetermined time, resulting in the PLC module 3 not receiving sufficient signals within the predetermined time. The PLC module 3 determines that the roller screen 1 is slipping and triggers the alarm module 8 to sound an alarm.

[0032] The working principle of the roller screen 1 slip detection alarm system is to monitor the rotation state of the roller screen 1 based on the change of the magnetic field, so as to determine whether there is a slip phenomenon. This function is achieved by the magnetic ring 5 installed on the roller screen 1 and the proximity switch 4 on the frame 2.

[0033] The magnetic ring 5 is installed on the surface of the rolling screen 1 and moves with the rotation of the rolling screen 1. The proximity switch 4 is installed on the frame 2. When the magnetic ring 5 moves to the range of the proximity switch 4, the switch will be triggered by the magnetic ring 5 and send a signal. The sent signal is transmitted to the PLC (Programmable Logic Controller) module through an electrical connection. The PLC module 3 determines whether the rolling screen 1 rotates normally based on the received signal frequency and time. If enough signals are received within the set time, it means that the rolling screen 1 rotates normally; if the received signals are insufficient, it may indicate that the rolling screen 1 has slipped. When the PLC module 3 determines that the rolling screen 1 has slipped, it will trigger the alarm module 8 to sound an alarm and notify the operator to deal with it in time.

[0034] This roller screen slippage detection alarm system can automatically monitor the rotation state of the roller screen 1, reducing dependence on manual labor. Once the roller screen 1 is detected to be slipping, the system can immediately trigger an alarm to avoid or reduce production interruptions or equipment damage caused by slippage. By real-time monitoring and timely handling of slippage problems, the continuous operation time and production efficiency of the screening equipment can be improved. The system can help reduce equipment wear caused by slippage, thereby extending the service life of the equipment and reducing maintenance costs. Timely alarms can ensure the safety of operators and avoid potential dangers caused by failure to detect slippage in time.

[0035] The roller screen 1 is provided with a mounting member 6 for mounting and fixing in cooperation with the magnetic ring 5. The mounting member 6 includes a mounting frame 61 threadedly connected to the roller screen 1 by bolts, an annular groove 62 opened on the mounting frame 61 and embedded in cooperation with the magnetic ring 5, and a locking screw 63 and a nut 64. After the locking screw 63 passes through the circular through hole 65 on the mounting frame 61, the magnetic ring 5 is locked and positioned in the annular groove 62 through the cooperation of the head 66 on the locking screw 63 and the nut 64.

[0036] The proximity switch 4 is fixed on a fixing frame 7, and the fixing frame 7 is threadedly connected to the frame 2 via bolts.

[0037] By means of the mounting frame 61, the annular groove 62, the locking screw 63 and the nut 64 and other components, the magnetic ring 5 is stably fixed on the rolling screen 1, thereby enhancing the stability of the installation of the magnetic ring 5; by means of the cooperation of the locking screw 63 and the nut 64, the magnetic ring 5 is accurately locked in the annular groove 62, thereby ensuring the accurate position of the magnetic ring 5 on the rolling screen 1, facilitating the proximity switch 4 to detect the position change of the magnetic ring 5, and further to more accurately detect the slipping phenomenon; by means of the bolt threaded connection, the fixing frame 7 can be conveniently installed and removed from the rolling screen 1, thereby facilitating maintenance and overhaul.

[0038] The proximity switch 4 is fixed on the frame 2, which can ensure that the position of the proximity switch 4 and the roller screen 1 remain relatively stable, thereby improving the detection accuracy.

[0039] The output signal of the proximity switch 4 is transmitted to the input port of the PLC module 3 via a cable or a wireless transmission module, depending on the site conditions and implementation requirements.

[0040] The roller screen slip detection and alarm system utilizes the existing PLC control system and adds a set of signal detection devices, namely, a proximity switch 4 to realize roller screen 1 slip detection and alarm. Therefore, it is simple to realize and has low investment cost, and can effectively solve the problem of clogging caused by the slip of the roller screen 1.

[0041] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A roller screen slippage detection and alarm system, comprising a roller screen (1) supported by tires and a frame (2), characterized in that: The rolling screen (1) is provided with a magnetic ring (5) that moves along with the surface of the rolling screen (1), and the frame (2) is provided with a proximity switch (4) that is used to detect a changing magnetic field and generate a signal to be sent to an input port of a PLC module (3). The PLC module (3) executes logic in a program according to changes in the input signal to determine whether the rolling screen (1) is slipping.

2. A roller screen slippage detection and alarm system according to claim 1, characterized in that: The rolling screen (1) is provided with a mounting member (6) for mounting and fixing the magnetic ring (5). The mounting member (6) comprises a mounting frame (61) threadedly connected to the rolling screen (1) by bolts, an annular groove (62) provided on the mounting frame (61) and embedded in cooperation with the magnetic ring (5), a locking screw (63) and a nut (64). After the locking screw (63) passes through a circular through hole (65) on the mounting frame (61), the magnetic ring (5) is locked and positioned in the annular groove (62) by the cooperation of a head (66) on the locking screw (63) and the nut (64).

3. A roller screen slippage detection and alarm system according to claim 1, characterized in that: The proximity switch (4) is fixed on a fixing frame (7), and the fixing frame (7) is threadedly connected to the frame (2) via bolts.

4. A rolling screen slippage detection and alarm system according to claim 1, characterized in that: The PLC module (3) is electrically connected to the alarm module (8).

5. A roller screen slippage detection and alarm system according to claim 4, characterized in that: When the magnetic ring (5) rotates to a position close to the switch (4), the switch (4) senses the presence of the magnetic ring (5) and sends a signal, which is transmitted to the PLC module (3) through an electrical connection; When the rolling screen (1) rotates normally, the magnetic ring (5) approaches the switch (4) multiple times within a predetermined time when the rolling screen (1) rotates one circle, and the PLC module (3) receives multiple signals within the predetermined time; When the rolling screen (1) slips, the magnetic ring (5) cannot normally trigger the proximity switch (4) within the predetermined time, resulting in the PLC module (3) not receiving sufficient signals within the predetermined time. The PLC module (3) determines that the rolling screen (1) is slipping and triggers the alarm module (8) to sound an alarm.

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