Vacuum control system

Abstract

The utility model discloses a vacuum control system, and belongs to the technical field of vacuum heating. Comprising a porcelain baking furnace, a control module, a motor, a heating body, a vacuum pump, a vacuum pump connecting pipe, an air pressure balance pipe, a first electromagnetic valve and a second electromagnetic valve, the motor is electrically connected with the control module through a first relay, the heating body is electrically connected with the control module through a second relay, the vacuum pump is electrically connected with the control module through a third relay, the first electromagnetic valve is electrically connected with the control module through a fourth relay, and the second electromagnetic valve is electrically connected with the control module through a fifth relay. The beneficial effects are that the precision of the pressure sensor on the circuit is increased, the output power of the vacuum pump is increased, the program response speed is improved in embedded software, and the quality of the vacuum degree is acquired and judged in real time; and a burning program debugged by the simulator is transmitted to the control module through the burning program interface circuit, so that the adjustment of the vacuum quality in the sintering process is realized.

Description

Technical Field

[0001] This utility model relates to a vacuum control system and belongs to the technical field of vacuum heating. Background Technology

[0002] The ceramic kiln industry is currently in a phase of rapid development, with continuous technological advancements and sustained growth in market demand. In recent years, the ceramic kiln industry has experienced significant technological changes and market demand growth, particularly in the field of ceramic material firing. As a core piece of equipment, the development of ceramic kilns is of great importance in promoting the transformation and upgrading of the ceramic industry.

[0003] The quality of ceramic material firing has also improved accordingly. In order to better ensure the firing quality, in addition to strict heating, corresponding solutions are also needed in vacuum control, such as increasing the accuracy of pressure sensors, improving program response speed, and achieving real-time acquisition and judgment of vacuum quality.

[0004] The vacuum level in the currently used porcelain firing furnace is insufficient, resulting in poor firing quality and even problems such as bubbles and looseness in the fired porcelain. The possible causes of this problem are:

[0005] First, there is the issue of hardware connection problems: such as malfunctions in the vacuum pump or its connecting pipes, or leaks at the sealing surfaces.

[0006] Second, the circuit control: the pressure sensor has low accuracy, the embedded program control is inaccurate, and there is no real-time acquisition to judge the vacuum quality. Utility Model Content

[0007] The purpose of this invention is to provide a vacuum control system that can effectively solve the above-mentioned problems.

[0008] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0009] It includes a ceramic furnace, a control module, a motor, a heating element, a vacuum pump, a vacuum pump connecting pipe, and a pressure balance pipe; a first solenoid valve is installed in the vacuum pump connecting pipe, and a second solenoid valve is installed in the pressure balance pipe;

[0010] The motor is electrically connected to the control module via a first relay, the heating element is electrically connected to the control module via a second relay, the vacuum pump is electrically connected to the control module via a third relay, the first solenoid valve is electrically connected to the control module via a fourth relay, and the second solenoid valve is electrically connected to the control module via a fifth relay.

[0011] Furthermore: the control module is electrically connected to an A / D conversion module, and the A / D conversion module is electrically connected to a pressure sensor.

[0012] Furthermore, the control module is electrically connected to a communication module.

[0013] Furthermore: the control module is electrically connected to a power supply module, and the power supply module is electrically connected to a power source.

[0014] Furthermore, the control module is electrically connected to an indicator light circuit module.

[0015] Furthermore, the control module is electrically connected to a data acquisition circuit module.

[0016] The beneficial effects are:

[0017] 1. Improve the accuracy of the pressure sensor in the circuit, increase the output power of the vacuum pump, and improve the program response speed in the embedded software to achieve real-time acquisition and judgment of the vacuum quality.

[0018] 2. The sintering program debugged by the simulator is transmitted to the control module through the programming interface circuit to adjust the vacuum quality during the sintering process. Attached Figure Description

[0019] For ease of explanation, this utility model is described in detail below with reference to the specific embodiments and accompanying drawings.

[0020] Figure 1 This is a flowchart of the present invention;

[0021] Figure 2 This is the circuit diagram of the control module of this utility model.

[0022] Figure 3 This is the motor drive circuit diagram of this utility model;

[0023] Figure 4 This is a circuit diagram of the heating element of this utility model;

[0024] Figure 5 This is the start / stop circuit diagram for the vacuum pump of this utility model;

[0025] Figure 6 This is the air extraction circuit diagram for this utility model;

[0026] Figure 7 This is the circuit diagram for the air pressure balance of this utility model;

[0027] Figure 8 This is the A / D conversion circuit diagram of this utility model;

[0028] Figure 9 This is the communication circuit diagram of this utility model;

[0029] Figure 10 This is the circuit diagram of the power supply circuit for this utility model;

[0030] Figure 11This is the lighting circuit diagram for this utility model;

[0031] Figure 12 This is the circuit diagram for the data acquisition of this utility model;

[0032] Figure 13 This is the jumper circuit diagram of this utility model;

[0033] Figure 14 This is the circuit diagram of the programming interface for this utility model.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Control module; 2. Motor; 3. Heating element; 4. Vacuum pump; 5. First solenoid valve; 6. Second solenoid valve; 7. First relay; 8. Second relay; 9. Third relay; 10. Fourth relay; 11. Fifth relay; 12. A / D conversion module; 13. Pressure sensor; 14. Communication module; 15. Power supply module; 16. Power supply; 17. Indicator light circuit module; 18. Data acquisition circuit module; 19. Jumper module; 20. Programming interface module. Detailed Implementation

[0036] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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 of this utility model.

[0038] Furthermore, the terms “first,” “second,” “third,” etc., are used for descriptive purposes only and should not be interpreted as indicating or implying relative importance.

[0039] Furthermore, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] See Figure 1-14 This is one embodiment of a vacuum control system according to the present invention.

[0041] It includes a ceramic furnace, a control module 1, a motor 2, a heating element 3, a vacuum pump 4, a vacuum pump connecting pipe, and a pressure balance pipe; a first solenoid valve 5 is installed in the vacuum pump 4 connecting pipe, and a second solenoid valve 6 is installed in the pressure balance pipe;

[0042] The heating element 3 in this device is an electric heating wire, which is arranged inside the ceramic firing furnace. The vacuum pump 4 is connected to the ceramic firing furnace through a vacuum pump connecting pipe. The first solenoid valve 5 controls the opening and closing of the vacuum pump connecting pipe. The ceramic firing furnace is connected to the external environment through a pressure balance pipe. The second solenoid valve 6 controls the opening and closing of the pressure balance pipe.

[0043] Motor 2 is electrically connected to control module 1 via first relay 7, heating element 3 is electrically connected to control module 1 via second relay 8, vacuum pump 4 is electrically connected to control module 1 via third relay 9, first solenoid valve 5 is electrically connected to control module 1 via fourth relay 10, and second solenoid valve 6 is electrically connected to control module 1 via fifth relay 11.

[0044] The control module 1 of this control system uses an STM32G030F6P6 CPU; see circuit diagram. Figure 2 The CPU's pins are connected according to their functions as follows:

[0045] 1. Drive circuit for controlling motor 2 (see...) Figure 3 );

[0046] 2. Heating circuit for controlling the operation of heating element 3 (see...) Figure 4 );

[0047] 3. Vacuum pump start / stop circuit that controls vacuum pump 4 (see...) Figure 5 );

[0048] 4. The air extraction circuit that controls the operation of the first solenoid valve 5 (see...) Figure 6 );

[0049] 5. Pressure balancing circuit for controlling the operation of the second solenoid valve 6 (see...) Figure 7 );

[0050] For the drive circuit, it is mainly used to drive the first relay 7 to control the forward and reverse rotation of the motor 2;

[0051] For the heating circuit, it is mainly used to drive the second relay 8 to control the heating temperature of the heating wire;

[0052] For the vacuum pump start / stop circuit, it is mainly used to drive the third relay 9 to control the switching of the vacuum pump 4;

[0053] The vacuum circuit is mainly used to perform vacuuming operations on the ceramic furnace. The fourth relay 10 is used to control the opening and closing of the first solenoid valve 5, which can connect the vacuum pump connecting pipe and allow the vacuum pump 4 to extract the gas from the ceramic furnace.

[0054] The air pressure balancing circuit is mainly used to balance the air pressure inside the ceramic firing furnace. The fifth relay 11 is used to control the opening and closing of the second solenoid valve 6, which can connect the air pressure balancing pipe. The inside of the ceramic firing furnace is connected to the external environment through the air pressure balancing pipe. The gas from the external environment is replenished into the ceramic firing furnace to complete the air pressure balance.

[0055] The control module 1 is electrically connected to the A / D conversion module 12, and the A / D conversion module 12 is electrically connected to the pressure sensor 13.

[0056] The A / D conversion module 12 is equipped with an A / D conversion circuit (see...). Figure 8 The A / D conversion circuit is mainly used to convert the signal detected by the pressure sensor 13; at the same time, it increases the accuracy of the pressure sensor 13, increases the output power of the vacuum pump, and improves the program response speed in the embedded software, so as to achieve real-time acquisition and judgment of the vacuum quality.

[0057] Control module 1 is electrically connected to communication module 14; communication module 14 contains a communication circuit (see...). Figure 9 Its main function is to enable wired communication. The physical interface for this wired communication is RS232, and the communication protocol is Modbus RTU, which facilitates remote control by staff.

[0058] Control module 1 is electrically connected to power supply module 15, and power supply module 15 is equipped with a power supply circuit (see...). Figure 10 ); Power supply module 15 is electrically connected to power supply 16.

[0059] Control module 1 is electrically connected to indicator light circuit module 17, which contains a lighting circuit (see...). Figure 11 This is used to control the illumination of LED lights, making it easier for workers to identify the working status of the ceramic kiln.

[0060] Control module 1 is electrically connected to acquisition circuit module 18, which contains an acquisition circuit (see...). Figure 12 ); and limit switches are provided for easy control of opening.

[0061] Control module 1 is electrically connected via a jumper circuit (see...) Figure 13 The jumper circuit is provided by jumper module 19; its main function is to open the circuit when the jumper is running the program and short the circuit when the program is downloading.

[0062] Control module 1 is electrically connected to a programming interface circuit (see...) Figure 14 The programming interface circuit is provided by the programming interface module 20; its main function is to send the sintering program debugged by the simulator to the control module 1 to adjust the vacuum quality during the sintering process.

[0063] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A vacuum control system, characterized in that: The system includes a ceramic furnace, a control module (1), a motor (2), a heating element (3), a vacuum pump (4), a vacuum pump connecting pipe, and a pressure balance pipe. A first solenoid valve (5) is installed in the connecting pipe of the vacuum pump (4), and a second solenoid valve (6) is installed in the pressure balance pipe. The motor (2) is electrically connected to the control module (1) through a first relay (7), the heating element (3) is electrically connected to the control module (1) through a second relay (8), the vacuum pump (4) is electrically connected to the control module (1) through a third relay (9), the first solenoid valve (5) is electrically connected to the control module (1) through a fourth relay (10), and the second solenoid valve (6) is electrically connected to the control module (1) through a fifth relay (11).

2. The vacuum control system according to claim 1, characterized in that: The control module (1) is electrically connected to an A / D conversion module (12), and the A / D conversion module (12) is electrically connected to a pressure sensor (13).

3. The vacuum control system according to claim 2, characterized in that: The control module (1) is electrically connected to the communication module (14).

4. The vacuum control system according to claim 3, characterized in that: The control module (1) is electrically connected to the power supply module (15), and the power supply module (15) is electrically connected to the power source (16).

5. The vacuum control system according to claim 4, characterized in that: The control module (1) is electrically connected to the indicator light circuit module (17).

6. The vacuum control system according to claim 5, characterized in that: The control module (1) is electrically connected to the acquisition circuit module (18).

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