Anti-static device of vibrating screen

Abstract

The utility model relates to an anti-static device for a vibrating screen. The anti-static device comprises a vibration eliminator, a monitor and a sub-control box, a first interface of the monitor is connected with the vibration eliminator through a first signal cable, and a second interface of the monitor is connected with the vibration eliminator through an instrument air pipe; a third interface of the monitor is connected with the monitor through a second signal cable; and a fourth interface of the monitor is connected with the first filtering pressure reducing valve. The utility model aims to provide the anti-static device for the vibrating screen, which aims to overcome the existing defects, effectively eliminate static electricity and prevent the occurrence of fire blast accidents.

Description

Technical Field

[0001] The utility model relates to an anti-static device for a vibrating screen. Background Art

[0002] As a highly efficient screening equipment, vibrating screen is widely used in material processing. It uses reciprocating or rotating vibrations generated by various driving modes to make bulk materials of different particle sizes pass through the sieve holes of a single or multi-layer screen surface, and then classify them according to the particle size to meet the specific particle size requirements of subsequent operations or processes.

[0003] However, during the material transportation process, the collision and friction between the material and the pipe and screen are inevitable, and this physical action will cause the generation of static electricity. If there is no static electricity elimination measure, the static electricity generated during the transportation process will enter the downstream silo or device along with the material and gradually accumulate there. When the accumulated static electricity reaches a certain level and discharges, it may cause a combustion and explosion accident under certain conditions, seriously threatening production safety.

[0004] In addition, the adsorption generated by static electricity can also cause material agglomeration in the silo and related devices, which not only affects the fluidity of the material, making the material discharge process unsmooth, but also reduces the conveying capacity of the entire system. If the system lacks a static elimination device, the vibrating screen often needs to be stopped for cleaning due to poor material discharge, which not only increases production costs, but also increases the scrap rate, causing a double blow to production efficiency and economic benefits. Therefore, a vibrating screen anti-static device is proposed to address the above problems. Utility Model Content

[0005] The utility model aims to overcome the existing defects and provide an anti-static device for a vibrating screen, which can effectively eliminate static electricity and prevent the occurrence of combustion and explosion accidents.

[0006] The technical solution for achieving the above-mentioned purpose is: a vibrating screen anti-static device, including a vibration eliminator, a monitor and a sub-control box; the first interface of the monitor is connected to the vibration eliminator through a first signal cable, and the second interface of the monitor is connected to the vibration eliminator through an instrument air duct; the third interface of the monitor is connected to the monitor through a second signal cable; the fourth interface of the monitor is connected to a first filter pressure reducing valve.

[0007] Preferably, the lower end of the vibrating eliminator is connected to a vibrating screen.

[0008] Preferably, the monitor is connected to a downstream pipe chain conveyor.

[0009] Preferably, the vibrating eliminator has positive and negative high voltage generators and spray electrodes inside; the spray electrodes are divided into two circles, the positive and negative electrodes are alternately and evenly distributed on the tube wall, and are connected to the high voltage end of the high voltage generator.

[0010] Preferably, a movable Faraday cup and a cylinder are installed inside the monitor; the Faraday cup is connected to the charge-to-mass ratio transmitter in the sub-control box via a cable.

[0011] Preferably, the sub-control box is installed with an air source ball valve and a second filter pressure reducing valve inside and outside, as well as a two-position three-way solenoid valve for controlling ion wind, a two-position five-way solenoid valve for driving the Faraday cup, a charge-to-mass ratio transmitter and a pressure sensor.

[0012] Preferably, it also includes a control cabinet, the fifth interface of the monitor is connected to the control cabinet via a power cable; the sixth interface of the monitor is connected to the control cabinet via a third signal cable; and a PLC control device is installed in the control cabinet.

[0013] The beneficial effects of the utility model are: the anti-static device for the vibrating screen can improve the screening efficiency, reduce the occurrence of screen blocking, and ensure the smoothness and safety of the production process. By effectively eliminating static electricity, it can not only prevent the occurrence of explosion accidents, but also optimize the fluidity of materials, reduce production costs and scrap rates, and bring significant economic benefits to the material transportation and processing industries. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the utility model anti-static device for vibrating screen.

[0015] In the figure: 1. Vibration eliminator; 2. Monitor; 3. Sub-control box; 4. First signal cable; 5. Instrument air duct; 6. Second signal cable; 7. First filter pressure reducing valve; 8. Power cable; 9. Third signal cable; 10. Control cabinet. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "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 a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0017] The utility model will be further described below in conjunction with the accompanying drawings.

[0018] like Figure 1As shown, a vibrating screen anti-static device includes a vibrating eliminator 1, a monitor 2 and a sub-control box 3; the first interface of the monitor 2 is connected to the vibrating eliminator 1 through a first signal cable 4, and the second interface of the monitor 2 is connected to the vibrating eliminator 1 through an instrument air duct 5; the third interface of the monitor 2 is connected to the monitor 2 through a second signal cable 6; the fourth interface of the monitor 2 is connected to a first filter pressure reducing valve 7. The lower end of the vibrating eliminator 1 is connected to the vibrating screen. The monitor 2 is connected to the downstream pipe chain conveyor.

[0019] Specifically, the vibrating eliminator 1 has positive and negative high-voltage generators and a spray electrode inside; the spray electrode is divided into two circles, and the positive and negative electrodes are alternately and evenly distributed on the tube wall, and are connected to the high-voltage end of the high-voltage generator. When the high-voltage generator supplies power to the spray electrode, the surrounding medium, such as air or other impurities, will be ionized. The ionized charged carriers are blown into the downstream pipeline or downstream equipment by compressed air and neutralized with the charged medium particles. The amount of positive and negative ions ejected is precisely regulated by the control system, that is, the PLC control device precisely controls it.

[0020] Specifically, a movable Faraday cup and a cylinder are installed inside the monitor 2; the Faraday cup is connected to the charge-to-mass ratio transmitter in the sub-control box 3 through a cable. It should be noted that the measuring Faraday cup should be installed outside the side wall of the pipeline and should not be placed directly inside the pipeline to prevent measurement errors and possible spark discharge, thereby ensuring the safe operation of the device.

[0021] Specifically, the sub-control box 3 is equipped with an air source ball valve and a second filter pressure reducing valve, a two-position three-way solenoid valve for controlling ion wind, a two-position five-way solenoid valve for driving the Faraday cup, a charge-to-mass ratio transmitter and a pressure sensor inside and outside. Among them, the charge-to-mass ratio transmitter and the pressure sensor adopt existing common related products.

[0022] Specifically, it also includes a control cabinet 10, and the fifth interface of the monitor 2 is connected to the control cabinet 10 through a power cable 8; the sixth interface of the monitor 2 is connected to the control cabinet 10 through a third signal cable 9; and a PLC control device is installed in the control cabinet 10. In this embodiment, the PLC control device uses Siemens S7-1200 series products. The PLC control device can automatically adjust the output of the positive and negative ion flow of the static eliminator according to the detection results of the static monitor, thereby realizing the function of eliminating the static electricity of the medium. In addition, the anti-static device of the vibrating screen can be started and stopped synchronously with the air conveying device. When the conveying device selects the target silo and starts conveying, the corresponding static elimination device will start automatically, and the operating status of the equipment will be displayed in real time on the operating station screen. Once the air conveying device conveying line ends, the corresponding static elimination device will automatically stop running. It is worth mentioning that the static eliminator also retains the manual mode so that it can be manually cut out in case of a fault, thereby ensuring that it will not affect the start and stop and operation of the entire system.

[0023] The anti-static device for the vibrating screen replaces the upper cover of the vibrating screen with an anti-static device of a cone-like structure, thereby forming a complete anti-static device. The vibration anti-static device 1 of the vibrating screen anti-static device has a built-in DC positive and negative polarity high-voltage ion flow regulator, the output voltage is controlled by the PLC control device, and the output end is connected to the discharge needle assembly through a current limiting resistor. The component blows the ionized gas into the material pipeline through a positive pressure airflow, adopts advanced non-balanced bipolar ion wind anti-static technology, and does not require manual operation. Its ion generator generates space ions with appropriate proportion distribution to neutralize the static electricity carried by the material, which not only improves work efficiency, but also reduces the errors and risks caused by manual operation. The monitor body is equipped with a charge collector monitor on the side wall of the pipeline to check the polarity and value of the charge carried by the material, and the measured data is fed back to the PLC control device. The PLC control device automatically adjusts the anti-static parameters according to the test value until the static electricity is within a safe range. The charge transmitter uses a standard signal 4-20mA for transmission, and directly displays the equivalent unit mass charge (μC / kg) after system processing. The non-balanced bipolar ion flow output technology is adopted to greatly improve the de-staticization efficiency. At the same time, this technology also has a self-adjustment function, which can automatically adjust according to the actual situation to ensure the stability of the de-staticization effect. Equipped with a real-time online static electricity monitoring device, it can monitor the charged state of the material at any time. This real-time monitoring function helps to detect and solve static electricity problems in time and ensure the smooth progress of the production process. The inner wall of the static electricity monitor is designed to be consistent with the air delivery pipeline, without protrusions, so it will not have any impact on the flow of materials. This design ensures both the accuracy of monitoring and the smoothness of material flow.

[0024] This vibrating screen anti-static device can improve screening efficiency, reduce the occurrence of screen blockage, and ensure the smoothness and safety of the production process. By effectively eliminating static electricity, it can not only prevent the occurrence of explosion accidents, but also optimize material fluidity, reduce production costs and scrap rates, and bring significant economic benefits to the material transportation and processing industries.

[0025] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A vibrating screen anti-static device, characterized in that: The invention comprises a vibration eliminator (1), a monitor (2) and a sub-control box (3); the first interface of the monitor (2) is connected to the vibration eliminator (1) via a first signal cable (4), the second interface of the monitor (2) is connected to the vibration eliminator (1) via an instrument air duct (5); the third interface of the monitor (2) is connected to the monitor (2) via a second signal cable (6); and the fourth interface of the monitor (2) is connected to a first filter pressure reducing valve (7).

2. The anti-static device for vibrating screen according to claim 1, characterized in that: The lower end of the vibrating eliminator (1) is connected to a vibrating screen.

3. The anti-static device for vibrating screen according to claim 1, characterized in that: The monitor (2) is connected to the downstream pipe chain conveyor.

4. The anti-static device for vibrating screen according to claim 1, characterized in that: The vibrating eliminator (1) has positive and negative high voltage generators and spray electrodes inside; the spray electrodes are divided into two circles, the positive and negative electrodes are alternately and evenly distributed on the tube wall, and are connected to the high voltage end of the high voltage generator.

5. The anti-static device for vibrating screen according to claim 1, characterized in that: The monitor (2) is internally provided with a movable Faraday cup and a cylinder; the Faraday cup is connected to the charge-to-mass ratio transmitter in the sub-control box (3) via the second signal cable (6).

6. The anti-static device for vibrating screen according to claim 5, characterized in that: The sub-control box (3) is internally and externally equipped with an air source ball valve and a second filter pressure reducing valve, a two-position three-way solenoid valve for controlling ion wind, a two-position five-way solenoid valve for driving the Faraday cup, a charge-to-mass ratio transmitter and a pressure sensor.

7. The anti-static device for vibrating screen according to claim 1, characterized in that: It also comprises a control cabinet (10), wherein the fifth interface of the monitor (2) is connected to the control cabinet (10) via a power cable (8); the sixth interface of the monitor (2) is connected to the control cabinet (10) via a third signal cable (9); and a PLC control device is installed in the control cabinet (10).

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