Positive pressure explosion-proof system of explosion-proof industrial robot body and control cabinet and control method

Abstract

The invention relates to the technical field of explosion-proof equipment, in particular to a positive pressure explosion-proof system and control method for an explosion-proof industrial robot body and a control cabinet, the system comprises a robot body and a control cabinet which are applied to a dangerous area, and the robot body comprises a robot body positive pressure cavity; the control cabinet comprises a control cabinet positive pressure cavity, a control cabinet explosion-proof cavity with a control piece, and a control cabinet gas path element cavity with a gas path execution element and a monitoring element. By designing the positive pressure explosion-proof system of the explosion-proof industrial robot body and the control cabinet and the control method, the positive pressure explosion-proof system can be completely suitable for a dangerous environment, and the problem that a robot cannot be used due to the fact that no safe area exists in part of scenes is solved; by adding an auxiliary execution mechanism for cooling a control element in the positive pressure cavity of the control cabinet, the temperature is maintained to be controllable, and comprehensive and reliable protection of the whole robot system in an explosive environment is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of explosion-proof equipment, in particular to a positive pressure explosion-proof system and control method for an explosion-proof industrial robot body and control cabinet. BACKGROUND

[0002] In the current fire control product, polishing, spraying and chemical industry, there is no safety area in some use scenarios, which are all dangerous areas. The conventional robot body explosion-proof and control cabinet non-explosion-proof design cannot be installed in the dangerous area because the control cabinet does not have explosion-proof performance. Due to the installation site limitation, temperature group and other factors, the explosion-proof house is also difficult to apply.

[0003] Therefore, the robot body and the control cabinet both need to have explosion-proof function and be controlled by the same explosion-proof control system to ensure stable operation and safety in the dangerous environment. SUMMARY

[0004] In order to solve the above technical problems, the present application provides a positive pressure explosion-proof system and control method for an explosion-proof industrial robot body and control cabinet. By realizing the explosion-proof of the robot body and the control cabinet and being controlled by the same explosion-proof control system, it is suitable for explosive gas and explosive dust environment and meets the requirements of explosion-proof temperature group.

[0005] The technical problems to be solved by the present application are solved by the following technical solutions: The positive pressure explosion-proof system of the explosion-proof industrial robot body and the control cabinet comprises: The robot body is applied to a dangerous area and comprises a robot body positive pressure cavity. The control cabinet is applied to a dangerous area and comprises: A control cabinet positive pressure cavity; A control cabinet explosion-proof cavity provided with a control element; A control cabinet gas path element cavity provided with: A gas path execution element connected with a gas supply device, the robot body positive pressure cavity, the control cabinet positive pressure cavity and the control element; A monitoring element for monitoring the pressure in the robot body positive pressure cavity and the pressure and temperature in the control cabinet positive pressure cavity.

[0006] As a further improvement of the present application, the control element is a PLC.

[0007] As a further improvement of the present application, the gas path execution element comprises: An explosion-proof electromagnetic valve connected with the gas supply device; A robot body positive pressure cavity gas path execution element connected with the gas supply device, the explosion-proof electromagnetic valve and the robot body positive pressure cavity respectively; The control cabinet positive pressure cavity gas path executive part is connected with the gas supply device, the explosion-proof electromagnetic valve and the control cabinet positive pressure cavity respectively. The auxiliary executive part is connected with the gas supply device and the control cabinet positive pressure cavity.

[0008] As a further improvement of the present application, the robot body positive pressure cavity gas path executive part comprises: The first pressure regulating valve is connected with the gas supply device; The second pressure regulating valve is connected with the gas supply device; The first gas control valve is connected with the explosion-proof electromagnetic valve, the first pressure regulating valve, the second pressure regulating valve and the robot body positive pressure cavity; The second gas control valve is connected with the explosion-proof electromagnetic valve and the robot body positive pressure cavity; The first throttling valve is connected with the second gas control valve; The first flow meter is connected with the second gas control valve and the control part; The first silencer is connected with the first throttling valve and the first flow meter.

[0009] As a further improvement of the present application, the control cabinet positive pressure cavity gas path executive part comprises: The third pressure regulating valve is connected with the gas supply device; The fourth pressure regulating valve is connected with the gas supply device; The third gas control valve is connected with the explosion-proof electromagnetic valve, the third pressure regulating valve, the fourth pressure regulating valve and the control cabinet positive pressure cavity; The fourth gas control valve is connected with the explosion-proof electromagnetic valve and the control cabinet positive pressure cavity; The second throttling valve is connected with the fourth gas control valve; The second flow meter is connected with the fourth gas control valve and the control part; The second silencer is connected with the second throttling valve and the second flow meter.

[0010] As a further improvement of the present application, the auxiliary executive part comprises: The fifth pressure regulating valve is connected with the gas supply device and the control cabinet positive pressure cavity; The third silencer is connected with the control cabinet positive pressure cavity and the control part; The third flow meter is connected with the control cabinet positive pressure cavity; The fourth silencer is connected with the third flow meter.

[0011] The explosion-proof control method for the positive pressure of the explosion-proof industrial robot body and the control cabinet, which applies the explosion-proof control system for the positive pressure of the explosion-proof industrial robot body and the control cabinet, comprises the following steps: S1. Connect the power supply and air source, activate the explosion-proof button, enter the purging state, the explosion-proof solenoid valve opens, and the protective gas enters the positive pressure chamber of the robot body and the positive pressure chamber of the control cabinet through the pneumatic actuator of the robot body and the pneumatic actuator of the control cabinet, venting the dangerous gas in the chamber. During the purging process, the explosion-proof pressure transmitter and flow meter detect the pressure and flow. After the set requirements are met, the control unit starts timing. S2. After the timing of the control component is completed, the non-explosion-proof components in the positive pressure chamber of the robot body and the positive pressure chamber of the control cabinet are energized, the robot starts, the control component controls the explosion-proof solenoid valve to close, the pneumatic valve is reset, and it enters the pressure stabilization state. The protective gas enters the positive pressure chamber of the robot body and the positive pressure chamber of the control cabinet through the pneumatic actuator of the positive pressure chamber of the robot body and the pneumatic actuator of the positive pressure chamber of the control cabinet, maintaining the internal pressure of the chamber not less than 0.08 bar. S3. The explosion-proof pressure transmitter monitors the internal pressure of the robot body's positive pressure chamber and the control cabinet's positive pressure chamber in real time. The temperature sensor monitors the temperature of the control cabinet's positive pressure chamber in real time. If the temperature exceeds the limit, the explosion-proof audible and visual alarm will sound an alarm, and the protective gas will cool the control cabinet's positive pressure chamber through the auxiliary actuator. S4. If the internal pressure of the positive pressure chamber of the robot body and the positive pressure chamber of the control cabinet is lower than 0.08 bar, the controller will open the explosion-proof solenoid valve and enter the purging state. At the same time, the controller will start timing. If the internal pressure of the positive pressure chamber of the robot body and the positive pressure chamber of the control cabinet is higher than 0.08 bar within 15 seconds, the controller will enter the pressure stabilization state again. Otherwise, the non-explosion-proof components in the positive pressure chamber of the robot body and the positive pressure chamber of the control cabinet will be de-energized, and the controller will activate the explosion-proof audible and visual alarm.

[0012] The beneficial effects of this invention are: This invention designs a positive pressure explosion-proof system and control method for an explosion-proof industrial robot body and control cabinet, which is fully applicable to hazardous environments and solves the problem that robots cannot be used in some scenarios where there is no safe zone. By adding an auxiliary actuator to dissipate heat from the control components inside the positive pressure chamber of the control cabinet, the temperature is kept controllable, thus achieving comprehensive and reliable protection for the entire robot system in explosive environments. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the explosion-proof system structure. Figure 2 This is a schematic diagram of the control cabinet structure.

[0014] In the figure: 1, robot body positive pressure cavity; 2, control cabinet positive pressure cavity; 3, control cabinet explosion-proof cavity; 4, control cabinet gas path element cavity; 5, control element; 6, explosion-proof electromagnetic valve; 7, first pressure regulating valve; 8, second pressure regulating valve; 9, first pneumatic control valve; 10, second pneumatic control valve; 11, first throttle valve; 12, first flowmeter; 13, first silencer; 14, third pressure regulating valve; 15, fourth pressure regulating valve; 16, third pneumatic control valve; 17, fourth pneumatic control valve; 18, second throttle valve; 19, second flowmeter; 20, second silencer; 21, fifth pressure regulating valve; 22, third silencer; 23, third flowmeter; 24, fourth silencer; 25, first explosion-proof pressure transmitter; 26, second explosion-proof pressure transmitter; 27, temperature sensor; 28, safety valve; 29, explosion-proof button; 30, explosion-proof sound-light alarm; 31, gas source oil mist separator; 32, gas source precision pressure regulating valve; 33, control cabinet manual air inlet control ball valve. DETAILED DESCRIPTION

[0015] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in conjunction with the drawings and examples.

[0016] As shown in Figure 1 and Figure 2 , the positive pressure explosion-proof system of the explosion-proof industrial robot body and the control cabinet mainly includes the robot body, the control cabinet and the external gas supply device.

[0017] As a further improvement of the present embodiment, the robot body and the control cabinet are both applied in the hazardous area. The robot body includes a robot body positive pressure cavity 1, which contains servo motors, wire harnesses and other electrical elements. The control cabinet includes a control cabinet positive pressure cavity 2, a control cabinet explosion-proof cavity 3 and a control cabinet gas path element cavity 4. Each cavity is independently configured with safety and detection devices, and the wire harnesses between the cavities are sealed and connected through explosion-proof glands, meeting the strict requirements of the explosion-proof standard on the wire harness drag force and sealing performance.

[0018] As a further improvement of the present embodiment, the control cabinet positive pressure cavity 2 is provided with control elements for controlling the operation of the robot. The control cabinet explosion-proof cavity 3 is composed of multiple explosion-proof junction boxes, which contain control elements 5 with explosion-proof control programs, main power circuit breakers, safety barriers and other electrical elements that need to be installed in non-explosion-proof areas. In the present embodiment, the control elements 5 are PLCs. The control cabinet gas path element cavity 4 is provided with gas path execution elements and monitoring elements. The gas path execution elements are connected with the gas supply device, the robot body positive pressure cavity 1, the control cabinet positive pressure cavity 2 and the control elements 5. The monitoring elements are used to monitor the pressure in the robot body positive pressure cavity 1 and the pressure and temperature in the control cabinet positive pressure cavity 2.

[0019] As a further improvement of the embodiment, the gas path execution element comprises an explosion-proof electromagnetic valve 6, a robot body positive pressure cavity gas path execution element, a control cabinet positive pressure cavity gas path execution element, and an auxiliary execution element. Among them, the explosion-proof electromagnetic valve 6 is connected with the gas supply device and controlled by the control element 5. The robot body positive pressure cavity gas path execution element is respectively connected with the gas supply device, the explosion-proof electromagnetic valve 6 and the robot body positive pressure cavity 1, for inputting clean compressed air or inert gas in the gas supply device into the robot body positive pressure cavity 1, for purging and maintaining positive pressure. The purpose of purging is to exhaust the dangerous gas inside the cavity, and the purpose of maintaining positive pressure is to prevent the dangerous gas outside from entering the cavity. The control cabinet positive pressure cavity gas path execution element is respectively connected with the gas supply device, the explosion-proof electromagnetic valve 6 and the control cabinet positive pressure cavity 2, which plays the same role as the robot body positive pressure cavity gas path execution element, for purging and maintaining positive pressure of the control cabinet positive pressure cavity 2. The auxiliary execution element is connected with the gas supply device and the control cabinet positive pressure cavity 2, for blowing gas into the control cabinet positive pressure cavity 2 to cool the control elements inside the control cabinet positive pressure cavity 2, to maintain the controllable temperature, and secondly, to assist the control cabinet positive pressure cavity gas path execution element to maintain the positive pressure environment inside the control cabinet positive pressure cavity 2.

[0020] As a further improvement of the embodiment, the robot body positive pressure cavity gas path execution element comprises a first pressure regulating valve 7, a second pressure regulating valve 8, a first air control valve 9, a second air control valve 10, a first throttle valve 11, a first flow meter 12, and a first silencer 13.

[0021] The first pressure regulating valve 7 and the second pressure regulating valve 8 are respectively connected with the gas supply device. The first air control valve 9 is respectively connected with the explosion-proof electromagnetic valve 6, the first pressure regulating valve 7, the second pressure regulating valve 8 and the robot body positive pressure cavity 1. The second air control valve 10 is respectively connected with the explosion-proof electromagnetic valve 6 and the robot body positive pressure cavity 1, and the first air control valve 9 and the second air control valve 10 are controlled by the explosion-proof electromagnetic valve 6. The first throttle valve 11 is connected with the second air control valve 10. The first flow meter 12 is connected with the first throttle valve 11 and the control element 5. The first silencer 13 is connected with the first throttle valve 11 and the first flow meter 12.

[0022] As a further improvement of the embodiment, the control cabinet positive pressure cavity gas path execution element comprises a third pressure regulating valve 14, a fourth pressure regulating valve 15, a third air control valve 16, a fourth air control valve 17, a second throttle valve 18, a second flow meter 19, and a second silencer 20.

[0023] The third pressure regulating valve 14 and the fourth pressure regulating valve 15 are connected with the gas supply device respectively. The third pneumatic control valve 16 is connected with the explosion-proof electromagnetic valve 6, the third pressure regulating valve 14, the fourth pressure regulating valve 15 and the control cabinet positive pressure cavity 2 respectively. The fourth pneumatic control valve 17 is connected with the explosion-proof electromagnetic valve 6 and the control cabinet positive pressure cavity 2 respectively, and the third pneumatic control valve 16 and the fourth pneumatic control valve 17 are controlled by the explosion-proof electromagnetic valve 6. The second throttle valve 18 is connected with the fourth pneumatic control valve 17. The second flow meter 19 is connected with the fourth pneumatic control valve 17 and the control element 5. The second silencer 20 is connected with the second throttle valve 18 and the second flow meter 19.

[0024] As a further improvement of the embodiment, the auxiliary execution element includes a fifth pressure regulating valve 21, a third silencer 22, a third flow meter 23 and a fourth silencer 24.

[0025] The fifth pressure regulating valve 21 is connected with the gas supply device and the control cabinet positive pressure cavity 2. The third silencer 22 is connected with the control cabinet positive pressure cavity 2 and the control element 5. The third flow meter 23 is connected with the control cabinet positive pressure cavity 2. The fourth silencer 24 is connected with the third flow meter 23.

[0026] As a further improvement of the embodiment, the monitoring element includes a first explosion-proof pressure transmitter 25, a second explosion-proof pressure transmitter 26 and a temperature sensor 27.

[0027] The first explosion-proof pressure transmitter 25 is connected with the robot body positive pressure cavity 1 and the control element 5. The second explosion-proof pressure transmitter 26 is connected with the control cabinet positive pressure cavity 2 and the control element 5. The temperature sensor 27 is arranged in the control cabinet positive pressure cavity 2 and connected with the control element 5.

[0028] The first explosion-proof pressure transmitter 25 and the second explosion-proof pressure transmitter 26 can monitor the pressure inside the corresponding cavities in real time, ensure that the pressure inside the cavities is higher than the external pressure, thereby realizing the positive pressure explosion-proof function. The temperature inside the control cabinet positive pressure cavity 2 is monitored in real time by the temperature sensor 27, so as to ensure that it meets the temperature group requirements of explosion-proof equipment. In the embodiment, the temperature sensor 27 is provided with two, which adopts a dual-redundancy design to improve the monitoring accuracy.

[0029] The wire harness connection in all the above cavities is connected through an explosion-proof gland, and each wire harness is sealed to meet the wire harness drag force requirements of explosion-proof equipment.

[0030] As a further improvement of the embodiment, the robot body positive pressure cavity 1 is connected with the control cabinet positive pressure cavity 2 with a safety valve 28. By setting the safety valve 28, damage or safety accidents caused by overpressure can be avoided. The control cabinet positive pressure cavity 2 is externally provided with an explosion-proof button 29 and an explosion-proof sound and light alarm 30, and the explosion-proof sound and light alarm 30 is controlled by the control element 5.

[0031] The gas supply device includes a gas source, a gas source oil mist separator 31, a gas source precision pressure regulating valve 32, and a control cabinet manual air inlet control ball valve 33. The gas source oil mist separator 31 is connected with the gas source, and the gas source precision pressure regulating valve 32 is connected with the gas source oil mist separator 31, the explosion-proof electromagnetic valve 6, the first pressure regulating valve 7, the second pressure regulating valve 8, the third gas control valve 16, the fourth gas control valve 17, and the fifth pressure regulating valve 21. The control cabinet manual air inlet control ball valve 33 is arranged between the gas source precision pressure regulating valve 32 and the gas path execution element. The gas source is stable and clean compressed air or inert gas.

[0032] The explosion-proof industrial robot body and the control cabinet positive pressure explosion-proof control method apply the above-mentioned explosion-proof industrial robot body and the control cabinet positive pressure explosion-proof system. The method includes the following steps: S1, turn on the power supply and the gas source, the explosion-proof control system in the control cabinet explosion-proof cavity 3 is powered on, press the explosion-proof button 29, enter the purging state, the explosion-proof electromagnetic valve 6 is started, the gas control valve in the robot body positive pressure cavity gas path execution element and the control cabinet positive pressure cavity gas path execution element is switched, the protection gas enters the gas control valve from the pressure regulating valve in the robot body positive pressure cavity gas path execution element and the control cabinet positive pressure cavity gas path execution element, then enters the robot body positive pressure cavity 1 and the control cabinet positive pressure cavity 2, and is discharged through the gas control valve, the flow meter, and the silencer in the robot body positive pressure cavity gas path execution element and the control cabinet positive pressure cavity gas path execution element.

[0033] In this process, the first explosion-proof pressure transmitter 25 and the second explosion-proof pressure transmitter 26 detect that the pressure is not less than 0.08 bar, and the detection flow of the first flow meter 12 and the second flow meter 19 is greater than 300 L / min, two signals are transmitted to the control element 5, and then the control element 5 starts timing.

[0034] S2, after 17 min, the non-explosion-proof components in the robot body positive pressure cavity 1 and the control cabinet positive pressure cavity 2 are powered on, the robot is started, the explosion-proof electromagnetic valve 6 is controlled to be closed by the control element 5, the gas control valve is reset, enters the stable pressure state, the protection gas enters the robot body positive pressure cavity 1 and the control cabinet positive pressure cavity 2 from the pressure regulating valve and the gas control valve in the robot body positive pressure cavity gas path execution element and the control cabinet positive pressure cavity gas path execution element, and is discharged through the gas control valve, the flow meter, and the silencer.

[0035] In the process, the internal pressure of the robot body positive pressure cavity 1 and the control cabinet positive pressure cavity 2 is not less than 0.08 bar, which is monitored by the first explosion-proof pressure transmitter 25 and the second explosion-proof pressure transmitter 26 in real time; the temperature sensor 27 is started, and the internal temperature of the control cabinet positive pressure cavity 2 is monitored in real time.

[0036] S3, if the temperature exceeds 60℃, the non-explosion-proof components in the robot body positive pressure cavity 1 and the control cabinet positive pressure cavity 2 are powered off, the control component 5 controls the explosion-proof sound and light alarm 30 to alarm, the protection gas enters the control cabinet positive pressure cavity 2 through the auxiliary execution component, and then is discharged through the silencer to cool down.

[0037] S4, if the pressure in the robot body positive pressure cavity 1 and the control cabinet positive pressure cavity 2 is lower than 0.08 bar, the explosion-proof electromagnetic valve 6 is opened to enter the blowing state, and the control component 5 starts timing, in 15s, if the pressure in the robot body positive pressure cavity 1 and the control cabinet positive pressure cavity 2 is greater than 0.08 bar, the stable pressure state is entered again, otherwise the non-explosion-proof components in the robot body positive pressure cavity 1 and the control cabinet positive pressure cavity 2 are powered off, and the control component 5 controls the explosion-proof sound and light alarm 30 to alarm.

[0038] The above shows and describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A positive pressure explosion-proof system for an explosion-proof industrial robot body and a control cabinet, characterized by: The utility model relates to a kind of robot, including: Robot body, applied to dangerous area, including robot body positive pressure cavity (1); Control cabinet, applied to dangerous area, including: Control cabinet positive pressure cavity (2); Control cabinet explosion-proof cavity (3), is provided with control part (5); Control cabinet gas path element cavity (4) is provided with: Gas path execution element, connect with gas supply device, robot body positive pressure cavity (1), control cabinet positive pressure cavity (2) and control part (5); Monitoring element is used to monitor the pressure in robot body positive pressure cavity (1) and the pressure and temperature in control cabinet positive pressure cavity (2).

2. The positive pressure explosion-proof system of an explosion-proof industrial robot body and a control cabinet according to claim 1, characterized in that: Control part (5) is PLC.

3. The positive pressure explosion-proof system of an explosion-proof industrial robot body and a control cabinet according to claim 1, characterized in that: Gas path execution element includes: Explosion-proof solenoid valve (6), connect with gas supply device; Robot body positive pressure cavity gas path execution piece, respectively with gas supply device, explosion-proof solenoid valve (6) and robot body positive pressure cavity (1) are connected; Control cabinet positive pressure cavity gas path execution piece, respectively with gas supply device, explosion-proof solenoid valve (6) and control cabinet positive pressure cavity (2) are connected; Auxiliary execution piece, connect with gas supply device, control cabinet positive pressure cavity (2) are connected.

4. The positive pressure explosion-proof system of the explosion-proof industrial robot body and the control cabinet according to claim 3, characterized in that: Robot body positive pressure cavity gas path execution piece includes: First pressure regulating valve (7), connect with gas supply device; Second pressure regulating valve (8), connect with gas supply device; First gas control valve (9), connect with explosion-proof solenoid valve (6), first pressure regulating valve (7), second pressure regulating valve (8), robot body positive pressure cavity (1); Second gas control valve (10), connect with explosion-proof solenoid valve (6), robot body positive pressure cavity (1); First throttle valve (11), connect with second gas control valve (10); First flowmeter (12), connect with second gas control valve (10), control part (5); First silencer (13), connect with first throttle valve (11), first flowmeter (12).

5. The positive pressure explosion-proof system for an explosion-proof industrial robot body and a control cabinet according to claim 3, characterized in that: Control cabinet positive pressure cavity gas path execution piece includes: Third pressure regulating valve (14), connect with gas supply device; Fourth pressure regulating valve (15), connect with gas supply device; Third gas control valve (16), connect with explosion-proof solenoid valve (6), third pressure regulating valve (14), fourth pressure regulating valve (15), control cabinet positive pressure cavity (2); Fourth gas control valve (17), connect with explosion-proof solenoid valve (6), control cabinet positive pressure cavity (2); Second throttle valve (18), connect with fourth gas control valve (17); Second flowmeter (19), connect with fourth gas control valve (17), control part (5); Second silencer (20), connect with second throttle valve (18), second flowmeter (19).

6. The positive pressure explosion-proof system for an explosion-proof industrial robot body and a control cabinet according to claim 3, characterized in that: Auxiliary execution piece includes: Fifth pressure regulating valve (21), connect with gas supply device, control cabinet positive pressure cavity (2); Third silencer (22), connect with control cabinet positive pressure cavity (2), control part (5); Third flowmeter (23), connect with control cabinet positive pressure cavity (2); Fourth silencer (24), connect with third flowmeter (23).

7. The positive pressure explosion-proof system for an explosion-proof industrial robot body and a control cabinet according to claim 1, characterized in that: Monitoring element includes: First explosion-proof pressure transmitter (25), connect with robot body positive pressure cavity (1), control part (5); Second explosion-proof pressure transmitter (26), connect with control cabinet positive pressure cavity (2), control part (5); Temperature sensor (27) is arranged in control cabinet positive pressure cavity (2), connect with control part (5).

8. The positive pressure explosion-proof system for an explosion-proof industrial robot body and a control cabinet according to claim 1, characterized in that: The safety valve (28) is connected between the robot body positive pressure cavity (1) and the control cabinet positive pressure cavity (2).

9. The positive pressure explosion-proof system for an explosion-proof industrial robot body and a control cabinet according to claim 1, characterized in that: The explosion-proof button (29) and the explosion-proof sound-light alarm (30) are arranged outside the control cabinet positive pressure cavity (2).

10. A positive pressure explosion-proof control method for an explosion-proof industrial robot body and a control cabinet, characterized by: The explosion-proof industrial robot body and control cabinet positive pressure explosion-proof system according to any one of claims 1 to 9 comprises the following steps: S1, the power supply and the gas source are turned on, the explosion-proof button (29) is started, the purging state is entered, the explosion-proof electromagnetic valve (6) is opened, the protective gas enters the robot body positive pressure cavity (1) and the control cabinet positive pressure cavity (2) through the robot body positive pressure cavity gas path executive component and the control cabinet positive pressure cavity gas path executive component, the dangerous gas in the cavities is discharged, in the purging process, the explosion-proof pressure transmitter and the flowmeter detect the pressure and the flow, and the controller (5) is timed after the set requirements are reached; S2, after the controller (5) is timed, the non-explosion-proof components in the robot body positive pressure cavity (1) and the control cabinet positive pressure cavity (2) are powered on, the robot is started, the controller (5) controls the explosion-proof electromagnetic valve (6) to be closed, the gas control valve is reset, the stable pressure state is entered, the protective gas enters the robot body positive pressure cavity (1) and the control cabinet positive pressure cavity (2) through the robot body positive pressure cavity gas path executive component and the control cabinet positive pressure cavity gas path executive component, and the pressure inside the cavities is kept to be greater than or equal to 0.08 bar; S3, the explosion-proof pressure transmitter monitors the pressure inside the robot body positive pressure cavity (1) and the control cabinet positive pressure cavity (2) in real time, the temperature sensor (27) monitors the temperature of the control cabinet positive pressure cavity (2) in real time, if the temperature is too high, the explosion-proof sound-light alarm (30) alarms, and the protective gas cools the control cabinet positive pressure cavity (2) through the auxiliary executive component; S4, if the pressure inside the robot body positive pressure cavity (1) and the control cabinet positive pressure cavity (2) is less than 0.08 bar, the controller (5) controls the explosion-proof electromagnetic valve (6) to be opened, the purging state is entered, and the controller (5) starts timing, if the pressure inside the robot body positive pressure cavity (1) and the control cabinet positive pressure cavity (2) is greater than 0.08 bar within 15 seconds, the stable pressure state is entered again, otherwise, the non-explosion-proof components in the robot body positive pressure cavity (1) and the control cabinet positive pressure cavity (2) are powered off, and the controller (5) controls the explosion-proof sound-light alarm (30) to alarm.

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