Frequency control system of constant feeder

Abstract

The utility model relates to the technical field of feeders, in particular to a constant feeder frequency control system which comprises a belt used for conveying materials, a motor used for driving the belt to rotate, a motor frequency converter used for controlling the rotating speed of the motor and a detection device used for detecting the conveying speed of the materials. According to the utility model, the defects in the prior art are overcome, and through the cooperative arrangement of the motor frequency converter, the controller, the intermediate relay, the DCS frequency control switching button and other structures, when a fault occurs, an operator can click the DCS frequency control switching button to directly transmit a given signal of the DCS control system to the motor frequency converter, so that undisturbed switching is realized; therefore, stoppage of the roasting furnace caused by quantitative feeding faults is prevented, and the problems that when a sensor of an existing quantitative feeder is damaged, a motor frequency converter is prone to being uncontrolled and running at the maximum speed, the efficiency of equipment and production running is affected, a lot of waste materials are generated, and environmental protection accidents are prone to being caused when the sensor is damaged are solved as much as possible.

Description

Technical Field

[0001] The utility model relates to the technical field of feeders, in particular to a frequency control system for a quantitative feeder. Background Art

[0002] The quantitative feeder of the roasting furnace is mainly composed of a controller, a weighing sensor, a speed sensor, a frequency converter, a motor and a belt. The controller compares the given signal of the DCS system with the processed feedback signal of the weighing sensor and the speed sensor, and realizes the quantitative feeding function by PID regulation and controlling the speed of the frequency converter.

[0003] Due to the long-term operation of the quantitative feeder, the roller bearings of the weighing sensor are frequently worn, the speed sensor and its soft connection are frequently damaged, and the controller has frequent soft failures, which often leads to the motor inverter being out of control and running at the maximum speed. The feed rate doubles instantly, and the temperature of the roasting furnace suddenly drops, eventually causing the roasting furnace to stop operating. This not only affects the efficiency of the equipment and production operations, but also generates a lot of waste, which can easily lead to environmental accidents in serious cases. Utility Model Content

[0004] The purpose of the utility model is to solve or at least alleviate the problem that when the sensor of the existing quantitative feeder is damaged, the motor inverter is easily out of control and runs at the maximum speed, which not only affects the efficiency of the equipment and production operation, but also generates a lot of waste and easily leads to environmental accidents in serious cases.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a quantitative feeder frequency control system, comprising a belt for transmitting materials, a motor for driving the belt to rotate, a motor frequency converter for controlling the motor speed and a detection device for detecting the material transmission speed, the motor frequency converter is electrically connected to a controller, the controller is connected to a DCS control system, an intermediate relay is electrically connected between the controller and the DCS control system, the intermediate relay is electrically connected to the DCS control system through a DCS frequency control switching button, and an alarm for issuing an alarm is also electrically connected to the DCS control system.

[0006] Optionally, a transmission shaft connected to the belt transmission is embedded in the inner cavities at both ends of the belt, and the output end of the motor is fixedly connected to one of the ends of the transmission shaft.

[0007] Optionally, the detection device includes a weighing sensor installed under the belt and a speed sensor installed on an external frame for detecting the rotation speed of the belt.

[0008] Optionally, the DCS control system includes a human-machine interface, a controller, an input module and an output module.

[0009] Optionally, a DCS frequency control switch button is arranged on a human-machine interface of a DCS control system, and an intermediate relay is arranged on a given signal loop of a DCS control system in a control cabinet of a quantitative feeder.

[0010] Optionally, the DCS control system is connected to the controller for setting parameters. The controller compares the value detected by the receiving detection device with the set parameters and feeds back the comparison result to the DCS control system through the input module.

[0011] Optionally, the alarm is electrically connected to the DCS control system to sound an alarm when a deviation occurs between the feedback value and the set parameter comparison result.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] Through the coordinated setting among the structures such as the motor inverter, controller, intermediate relay and DCS frequency control switching button, when a fault occurs, the operator can click the DCS frequency control switching button to directly transmit the given signal of the DCS control system to the motor inverter to achieve disturbance-free switching, thereby preventing the roasting furnace from being shut down due to quantitative feeding failure, and avoiding the problem that some quantitative feeders, when the sensor is damaged, are prone to cause the motor inverter 3 to be out of control and run at the maximum speed, which not only affects the efficiency of equipment and production operation, but also generates a lot of waste, and in serious cases, it is easy to cause environmental accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a system diagram of the utility model;

[0015] Figure 2 This is a program judgment block diagram of the utility model.

[0016] In the figure: 1. belt; 2. motor; 3. motor inverter; 4. weighing sensor; 5. speed sensor; 6. controller; 7. DCS control system; 8. alarm; 9. intermediate relay; 10. DCS frequency control switch button. DETAILED DESCRIPTION

[0017] 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.

[0018] See also Figure 1-2A quantitative feeder frequency control system includes a belt 1 for transmitting materials, a motor 2 for driving the belt 1 to rotate, a motor frequency converter 3 for controlling the rotation speed of the motor 2, and a detection device for detecting the material transmission speed and the material weight. When in use, the raw material is introduced onto the belt 1, the material weight on the belt 1 is detected by the detection device, and the rotation speed of the motor 2 is controlled by the motor frequency converter 3, thereby controlling the rotation speed of the belt 1 to achieve quantitative feeding of the material.

[0019] The motor inverter 3 is electrically connected to a controller 6 of model TS901, which is connected to a DCS control system 7 so that a user can set the rotation speed parameters of the motor 2 through the DCS control system 7 and control the motor inverter 3 through the controller 6 .

[0020] An intermediate relay 9 is electrically connected between the controller 6 and the DCS control system 7. The intermediate relay 9 is electrically connected to the DCS control system 7 through a DCS frequency control switch button 10, and an alarm 8 for issuing an alarm is also electrically connected to the DCS control system 7. When the detection device detects that there is an error between the transmission speed of the belt 1 and the parameter set by the DCS control system 7, the alarm 8 can immediately sound an alarm to remind the user.

[0021] For details, please refer to Figure 1 The inner cavities at both ends of the belt 1 are embedded with transmission shafts connected to the belt 1, and the output end of the motor 2 is fixedly connected to one of the ends of the transmission shafts. When the motor 2 is started, it can drive one of the transmission shafts to rotate. Since the two transmission shafts are connected through the belt 1, the belt 1 can be driven to rotate between the two transmission shafts to achieve material transmission.

[0022] For details, please refer to Figure 2 The detection device includes a weighing sensor 4 installed under the belt 1, and also includes a speed sensor 5 installed on the external frame for detecting the rotation speed of the belt 1. The weighing sensor 4 is set to detect the weight of the material transmitted on the belt 1, and the speed sensor 5 is set to detect the transmission speed of the belt 1. According to the weight of the material transmitted on the belt 1, the transmission speed of the belt 1 is adjusted to achieve quantitative feeding of the material.

[0023] For details, please refer to Figure 1 The DCS control system 7 includes a human-machine interface, a controller, an input module and an output module. The human-machine interface is used to set parameters. The controller is a programmable controller, which is convenient for users to perform programming control. The output module is used to transmit the set parameter information to the controller 6. The input module is used to input the data fed back by the detection device into the DCS control system 7 for data judgment.

[0024] For details, please refer to Figure 2The DCS frequency control switch button 10 is set on the human-machine interface of the DCS control system 7, and the intermediate relay 9 is set on the given signal loop of the DCS control system 7 in the quantitative feeder control cabinet. When the speed sensor 5, the weighing sensor 4 is damaged, or the controller 6 fails, the operator can click the DCS frequency control switch button 10 to directly transmit the given signal of the DCS control system 7 to the motor inverter 3 to achieve non-disturbance switching. This avoids the shutdown of the roasting furnace due to quantitative feeding failure and reduces the risk of production fluctuation losses and environmental pollution.

[0025] For details, please refer to Figure 2 The DCS control system 7 is connected to the controller 6 for setting parameters. The controller 6 compares the value detected by the detection device with the set parameter and feeds back the comparison result to the DCS control system 7 through the input module. The controller 6 compares the value detected by the detection device with the set parameter and feeds back the comparison result to the DCS control system 7 through the input module, so that the DCS control system 7 determines whether it is necessary to start the alarm 8 to alarm and remind the user.

[0026] Specifically, refer to Figure 1 The alarm device 8 is electrically connected to the DCS control system 7 and is used to sound an alarm when a deviation occurs between the feedback value and the set parameter comparison result. When a deviation occurs in the data comparison result, the alarm device 8 starts to generate an alarm sound to remind the user to handle it in time.

[0027] Working principle: A DCS frequency control switching button 10 is provided on the human-machine interface of the DCS control system 7, and an intermediate relay 9 is provided on the given signal circuit of the DCS control system 7 in the quantitative feeder control cabinet. When the speed sensor 5 or the weighing sensor 4 is damaged, or the controller 6 fails, the operator can click the DCS frequency control switching button 10 to directly transmit the given signal of the DCS control system 7 to the motor inverter 3 to achieve disturbance-free switching, thereby preventing the roasting furnace from being shut down due to quantitative feeding failure, reducing the risk of production fluctuation losses and environmental pollution, and avoiding as much as possible the problem that some quantitative feeders are prone to uncontrolled motor inverter 3 and running at the maximum speed when the sensor is damaged, which not only affects the efficiency of equipment and production operation, but also generates a lot of waste, and in serious cases, easily leads to environmental accidents.

[0028] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0029] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A quantitative feeder frequency control system, comprising a belt (1) for transmitting materials, a motor (2) for driving the belt (1) to rotate, a motor frequency converter (3) for controlling the rotation speed of the motor (2), and a detection device for detecting the material transmission speed, wherein the motor frequency converter (3) is electrically connected to a controller (6), and the controller (6) is connected to a DCS control system (7), characterized in that: An intermediate relay (9) is electrically connected between the controller (6) and the DCS control system (7); the intermediate relay (9) is electrically connected to the DCS control system (7) via a DCS frequency control switching button (10); and an alarm (8) for issuing an alarm is also electrically connected to the DCS control system (7).

2. A quantitative feeder frequency control system according to claim 1, characterized in that: A transmission shaft connected to the belt (1) is embedded in the inner cavities at both ends of the belt (1), and the output end of the motor (2) is fixedly connected to one of the ends of the transmission shaft.

3. A quantitative feeder frequency control system according to claim 1, characterized in that: The detection device comprises a weighing sensor (4) installed below the belt (1), and also comprises a speed sensor (5) installed on an external frame for detecting the rotation speed of the belt (1).

4. A quantitative feeder frequency control system according to claim 1, characterized in that: The DCS control system (7) comprises a human-machine interface, a controller, an input module and an output module.

5. A quantitative feeder frequency control system according to claim 4, characterized in that: The DCS frequency control switch button (10) is arranged on the human-machine interface of the DCS control system (7), and the intermediate relay (9) is arranged on the given signal loop of the DCS control system (7) in the quantitative feeder control cabinet.

6. A quantitative feeder frequency control system according to claim 4, characterized in that: The DCS control system (7) is connected to the controller (6) and is used to set parameters. The controller (6) receives the value detected by the detection device and compares it with the set parameters, and feeds back the comparison result to the DCS control system (7) through an input module.

7. A quantitative feeder frequency control system according to claim 6, characterized in that: The alarm (8) is electrically connected to the DCS control system (7) and is used to issue an alarm when a deviation occurs between the feedback value and the result of comparison with the set parameter.

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