Control box for electrical automation

Abstract

The utility model discloses a control box for electrical automation, which comprises a box body and a box cover, a lower-layer power sub-cavity is arranged in the box body, the box cover is hinged on the box body to close or open the box body, an upper-layer control sub-cavity is arranged in the box cover, and a PLC (programmable logic controller) main control module, a temperature controller, a step driving module, a terminal strip, a moving assembly and an encoder are arranged in the upper-layer control sub-cavity. A switching power supply, a servo driver, a frequency converter and a pneumatic electromagnetic valve group are arranged in the lower-layer power sub-cavity, the terminal strip comprises a signal area terminal strip and a power area terminal strip, and the signal area terminal strip and the power area terminal strip are of an integrated structure and are used for separating a weak current signal line from a strong current line. A control area (upper-layer control sub-cavity) and a power area (lower-layer power sub-cavity) are subjected to vertical physical isolation of more than 250mm, and an optocoupler isolation interface is configured, so that electromagnetic interference of a strong current loop on weak current signals is remarkably reduced, and full-function modules such as servo driving, frequency conversion speed regulation, stepping control, pneumatic execution and man-machine interaction are integrated.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrical automation control equipment technical field especially relates to a control box for electrical automation. BACKGROUND

[0002] The control box for electrical automation is a device for centralized control and management of electrical equipment, mainly used in industrial automation, public facilities and intelligent buildings, etc. fields, through automation control to realize the safe and reliable operation of power system.

[0003] The traditional control box used in the current automation control system has many problems to be solved due to lack of systematic planning in structure design, such as mixed installation of control module and power module, electromagnetic interference generated by strong current loop easily invading weak current signal link, leading to distortion of control command transmission, decrease of equipment operation precision, lack of standardized layout of internal wiring, mixed and twisted strong and weak current cables, which not only increases the complexity of installation and debugging, but also brings great inconvenience to later fault troubleshooting and maintenance, low integration, often needs to be connected with a large number of auxiliary equipment to realize complete function, leading to large overall volume, difficult to adapt to the demand of space and mobility in small production line or teaching scene, at the same time, due to lack of effective isolation design (such as optical coupling isolation, signal shielding, etc.), in the complex scene of multi-device linkage, the system has weak anti-interference ability, easy to appear signal error code, equipment misoperation and other problems, which seriously affects the stability and reliability of automation control.

[0004] Therefore, the utility model is proposed to solve the above technical problems. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a control box for electrical automation to solve the technical problems of strong current interference, complex wiring, low integration and poor adaptability in the prior art.

[0006] The technical scheme of the utility model is: a control box for electrical automation, comprising:

[0007] The box body has a lower power subcavity in the box body;

[0008] The box cover is hinged to the box body to close or open the box body, and the box cover has an upper control subcavity in it;

[0009] Among them, the upper control subcavity is provided with PLC master control module, temperature controller, stepping drive module, terminal block, moving assembly and encoder, the lower power subcavity is provided with switching power supply, servo driver, frequency converter and pneumatic electromagnetic valve group, the distance between the lower power subcavity and the upper control subcavity is 250mm;

[0010] The switch power supply is electrically connected with the terminal block, the terminal block is electrically connected with a PLC master control module, a temperature controller, a stepping drive module, a moving assembly, a servo driver, a frequency converter and a pneumatic electromagnetic valve group, and the stepping drive module is electrically connected with the moving assembly;

[0011] The PLC master control module is electrically connected with the servo driver, the encoder, the temperature controller, the frequency converter, the stepping drive module and the pneumatic electromagnetic valve group.

[0012] The terminal block comprises a signal area terminal block and a power area terminal block, and the signal area terminal block and the power area terminal block are integrated structures for separating weak electric signals and strong electric lines.

[0013] The device further comprises an optical coupling isolation interface and an encoder feedback interface, the optical coupling isolation interface is connected with the encoder and the PLC master control module, and the encoder feedback interface is integrated in the PLC master control module.

[0014] Further, the box body is provided with a plurality of heat dissipation holes on two sides.

[0015] Further, the box cover is embedded with a touch screen, the touch screen is electrically connected with the terminal block, and the touch screen is electrically connected with the PLC master control module.

[0016] Further, the touch screen is provided with a button box on one side, the button box is signal connected with the PLC master control module, and the button box is electrically connected with the terminal block, so as to connect and cut off the switch power supply.

[0017] Further, the moving assembly comprises a stepping motor arranged in the upper control sub-cavity, and the stepping motor is electrically connected with the terminal block.

[0018] The output shaft of the stepping motor is connected with a screw rod, and the screw rod is installed on the inner wall of the upper control sub-cavity through a support away from the stepping motor.

[0019] A screwing sliding block is arranged on the screw rod.

[0020] The inner wall of the upper control sub-cavity is further provided with a sliding rail, and the sliding block is slidably arranged on the sliding rail.

[0021] Further, the moving assembly and the stepping drive module can be provided with multiple groups.

[0022] Further, the box cover is provided with a handle on the top.

[0023] By adopting the above technical scheme, the device has the following beneficial effects:

[0024] Layered isolation design: control area and power area are physically isolated, the control area (PLC main control module, touch screen, button box, temperature controller) is located in the box cover and in the upper layer; the power area (switching power supply, servo driver, frequency converter and pneumatic electromagnetic valve group) is located in the box body and in the lower layer, strong electric interference is isolated by vertical distance, the anti-interference ability is improved by holding the optical coupling isolation interface, and the signal error rate is less than or equal to 0.1%; the weak electric signal (PLC main control module, touch screen) goes through the signal area terminal block, and the strong electric signal (switching power supply, stepping motor, pneumatic electromagnetic valve group) goes through the power area terminal block, the control area (upper control sub-cavity) and the power area (lower power sub-cavity) are vertically physically isolated by more than 250, and the optical coupling isolation interface is configured, so that the electromagnetic interference of strong electric circuit on weak electric signal is significantly reduced.

[0025] Integrated servo drive, frequency conversion speed regulation, stepping control, pneumatic execution, human-computer interaction and other full function modules, without external auxiliary equipment, the complete control process of "instruction input-logic operation-power output-state feedback" can be completed, the overall volume is reduced by 50% compared with the traditional control box, and it can adapt to small assembly line, teaching demonstration platform and other space limited scenes. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings are part of the present application and serve to provide a further understanding of the present application, the schematic embodiments of the present application and the description thereof serve to explain the present application, but do not constitute an improper limitation on the present application. Obviously, the drawings in the following description are only some embodiments, and other drawings can be obtained by those skilled in the art without creating creative labor. In the drawings:

[0027] Figure 1 The structure diagram of the control box for electrical automation provided by the present embodiment is shown in the figure;

[0028] Figure 2 The front view of the control box for electrical automation provided by the present embodiment is shown in the figure;

[0029] Figure 3 The top view of the control box for electrical automation provided by the present embodiment is shown in the figure.

[0030] Reference signs: 1, box body; 2, box cover; 3, switching power supply; 4, heat dissipation hole; 5, servo driver; 6, frequency converter; 7, terminal block; 8, touch screen; 9, stepping drive module; 10, moving assembly; 11, encoder; 12, temperature controller; 13, PLC main control module; 14, button box; 15, pneumatic electromagnetic valve group; 101, stepping motor; 102, support; 103, screw rod; 104, sliding block; 105, sliding rail.

[0031] It should be noted that the drawings and the written description are not intended to limit the scope of the present application in any way, but are merely to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0032] The specific embodiments of the present application will be further described in detail with reference to the accompanying drawings.

[0033] Referring to Figures 1 to 3 As shown in the drawings, the application provides a control box for electrical automation, comprising: a box body 1 and a box cover 2, the box body 1 and the box cover 2 are made of aluminum alloy, the box body 1 has a lower power sub-cavity, the box cover 2 is hinged on the box body 1 to close or open the box body 1, the box cover 2 has an upper control sub-cavity, the distance between the lower power sub-cavity and the upper control sub-cavity is 250mm, wherein the upper control sub-cavity is provided with a PLC master control module 13, a temperature controller 12, a stepping drive module 9, a terminal block 7, a moving assembly 10 and an encoder 11, the lower power sub-cavity is provided with a switching power supply 3, a servo driver 5, a frequency converter 6 and a pneumatic electromagnetic valve group 15, the switching power supply 3 is electrically connected with the terminal block 7, the terminal block 7 is electrically connected with the PLC master control module 13, the temperature controller 12, the stepping drive module 9, the moving assembly 10, the servo driver 5, the frequency converter 6 and the pneumatic electromagnetic valve group 15 respectively, the stepping drive module 9 is electrically connected with the moving assembly 10, the PLC master control module 13 is electrically connected with the servo driver 5, the encoder 11, the temperature controller 12, the frequency converter 6, the stepping drive module 9 and the pneumatic electromagnetic valve group 15 respectively, the terminal block 7 comprises a signal area terminal block and a power area terminal block, the signal area terminal block and the power area terminal block are integrated structure, used for separating weak current signal and strong current circuit, further comprising an optical coupling isolation interface and an encoder feedback interface, the optical coupling isolation interface connects the encoder 11 and the PLC master control module 13, and the encoder feedback interface is integrated in the PLC master control module 13.

[0034] It should be noted that the PLC master module 13 is used to output control instructions, the switch power supply 3 inputs external 220V power supply, and outputs 24V, which is distributed to the PLC master module 13, the temperature controller 12, the stepping drive module 9, the terminal block 7, the moving assembly 10, the encoder 11, the servo driver 5, the frequency converter 6 and the pneumatic electromagnetic valve group 15 through the terminal block 7, so as to supply power for the control loop and guarantee the stable operation of the weak current module; the servo driver 5 receives the instructions of the PLC master module 13, realizes closed-loop control through feedback of the encoder 11, and thus drives the moving assembly 10 to move; the air pipe of the pneumatic electromagnetic valve group 15 is connected with external air cylinder and compressed air source, which is used to control the on-off / reversing of compressed air, drive the air cylinder to complete the grabbing and pushing actions, and support three independent pneumatic circuits to carry the materials; the terminal block 7 is used to collect / distribute electric wires and distribute electric energy, so as to avoid the disorder of strong current cables, reduce the risk of short circuit, facilitate wire checking and troubleshooting, and shorten the wire checking time in later maintenance; the temperature controller 12 is used to collect temperature signals and automatically control heating or refrigeration equipment, simulate hot processing temperature control, and is suitable for temperature closed-loop control demonstration in teaching.

[0035] In some possible embodiments, referring to Figure 1 As shown, the box body 1 is provided with heat dissipation holes 4 on both sides, which are used for natural heat dissipation of the frequency converter 6, the servo driver 5, the pneumatic electromagnetic valve group 15 and the switch power supply 3.

[0036] In some possible embodiments, referring to Figure 1 As shown in Figure 2 The box cover 2 is embedded with a touch screen 8, the touch screen 8 is electrically connected with the terminal block 7, and the touch screen 8 is electrically connected with the PLC master module 13, so that parameters such as servo speed and frequency of the frequency converter 6 can be set on the touch screen 8, and the device state can be displayed in real time.

[0037] In some possible embodiments, referring to Figure 2 As shown, one side of the touch screen 8 is provided with a button box 14, the button box 14 is signal connected with the PLC master module 13, and the button box 14 is electrically connected with the terminal block 7, which is used for quick connection and disconnection of the switch power supply 3 in emergency.

[0038] The moving assembly 10 comprises a stepper motor 101 arranged in the upper control sub-cavity, the stepper motor 101 is electrically connected with the terminal row 7, the frequency converter 6 is used for adjusting the power supply frequency of the stepper motor 101, realizing stepless speed regulation, adapting to the energy-saving control of the conveying belt, the fan and other equipment, the output shaft of the stepper motor 101 is connected with a lead screw 103, the lead screw 103 is installed on the inner wall of the upper control sub-cavity through the support 102 away from the stepper motor 101, a threaded sliding block 104 is sleeved on the lead screw 103, the inner wall of the upper control sub-cavity is also provided with a sliding rail 105, the sliding block 104 is slidably arranged on the sliding rail 105, the stepper drive module 9 receives the control signal of the PLC main control module 13, so as to drive the stepper motor 101 to rotate, the stepper motor 101 drives the lead screw 103 to rotate, the lead screw 103 drives the sliding block 104 to slide along the length direction of the sliding rail 105, and the encoder 11 is used for feeding back the rotating speed of the stepper motor 101 in real time, so as to form speed closed-loop control.

[0039] The partition principle is that the control area (the PLC main control module 13, the touch screen 8, the button box 14 and the temperature controller 12) is located in the box cover 2 and is in the upper layer, the power area (the switching power supply 3, the servo driver 5, the frequency converter 6 and the pneumatic electromagnetic valve group 15) is located in the box body 1 and is in the lower layer, and the strong electric interference is isolated by vertical distance.

[0040] The weak electric signal (the PLC main control module 13 and the touch screen 8) is arranged in the signal area terminal row, and the strong electric signal (the switching power supply 3, the stepper motor 101 and the pneumatic electromagnetic valve group 15) is arranged in the power area terminal row.

[0041] The moving assembly 10 and the stepper drive module 9 can be arranged in multiple groups.

[0042] The box cover 2 is provided with a handle at the top.

[0043] Working principle

[0044] The power supply process is that the external power supply is connected to the switching power supply 3, the switching power supply 3 converts 24V DC and then distributes the 24V DC to the PLC main control module 13, the touch screen 8 and the sensor through the power area terminal row, and AC380V is directly supplied to the frequency converter 6 to drive the stepper motor 101.

[0045] The control logic is that the instruction is sent through the touch screen 8, the PLC main control module 13 receives the instruction and executes the gradient graph logic in combination with the sensor signal (the feedback of the encoder 11 and the signal of the temperature controller 12), the PLC main control module 13 outputs the signal to the servo driver 5, the frequency converter 6 and the stepper motor 101 through the terminal row 7, the frequency converter 6 realizes speed regulation, and the pneumatic electromagnetic valve group 15 drives the cylinder to act.

[0046] The specific embodiment is only an explanation of the utility model, and is not a limitation of the utility model, and a person skilled in the art can make a modification without creative contribution according to the need after reading the specification, as long as the modification is within the protection scope of the utility model and is protected by the patent law.

Claims

1. A control box for electrical automation, characterized by, The utility model relates to a kind of power and control integrated box, including: Box (1), the lower power sub-cavity is in the box (1); Box cover (2), the box cover (2) is hinged on the box (1), to close or open the box (1), the upper control sub-cavity is in the box cover (2); Wherein, PLC master module (13), temperature controller (12), step drive module (9), terminal row (7), moving assembly (10) and encoder (11) are provided in the upper control sub-cavity, switch power supply (3), servo driver (5), frequency converter (6) and pneumatic electromagnetic valve group (15) are provided in the lower power sub-cavity, the distance between the lower power sub-cavity and upper control sub-cavity is 250mm; The switch power supply (3) is electrically connected with the terminal row (7), and the terminal row (7) is respectively electrically connected with the PLC master module (13), the temperature controller (12), the step drive module (9), the moving assembly (10), the servo driver (5), the frequency converter (6) and the pneumatic electromagnetic valve group (15), and the step drive module (9) is electrically connected with the moving assembly (10); The PLC master module (13) is electrically connected with the servo driver (5), the encoder (11), the temperature controller (12), the frequency converter (6), the step drive module (9) and the pneumatic electromagnetic valve group (15) respectively; The terminal row (7) includes signal area terminal row and power area terminal row, and the signal area terminal row and the power area terminal row are integrated structures for separating weak electrical signal and strong electrical circuit; It also includes an optical coupling isolation interface and an encoder feedback interface, the optical coupling isolation interface connects the encoder (11) and the PLC master module (13), and the encoder feedback interface is integrated in the PLC master module (13).

2. The control box for electrical automation according to claim 1, characterized by The box (1) is provided with a heat dissipation hole (4) on both sides.

3. The control box for electrical automation according to claim 1, characterized by The box cover (2) is embedded with a touch screen (8), the touch screen (8) is electrically connected with the terminal row (7), and the touch screen (8) is electrically connected with the PLC master module (13).

4. The control box for electrical automation according to claim 3, characterized by A button box (14) is arranged on one side of the touch screen (8), the button box (14) is signal connected with the PLC master module (13), the button box (14) is electrically connected with the terminal row (7), and is used for connecting and cutting off the switch power supply (3).

5. The control box for electrical automation according to claim 4, characterized by The moving assembly (10) includes a step motor (101) arranged in the upper control sub-cavity, and the step motor (101) is electrically connected with the terminal row (7); The output shaft of the step motor (101) is connected with a screw rod (103), and one end of the screw rod (103) away from the step motor (101) is installed on the inner wall of the upper control sub-cavity through a support (102); A threaded slider (104) is sleeved on the screw rod (103); The inner wall of the upper control sub-cavity is also provided with a sliding rail (105), and the slider (104) is slidably arranged on the sliding rail (105).

6. The control box for electrical automation according to claim 5, characterized by The moving assembly (10) and the step drive module (9) can be provided with multiple groups.

7. The control box for electrical automation according to claim 6, characterized by A handle is arranged on the top of the box cover (2).

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