Electrical hardware safety loop of automation equipment
By introducing electrical hardware safety circuits into automated equipment and utilizing hierarchical control of emergency stop, door locks, and light curtain safety relays, the safety failure problem caused by the reliance on PLC programs in existing technologies is solved, multi-level hardware safety control is realized, and the safety level of the equipment is improved.
Patent Information
- Application Number
- CN202520282931.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-02-21
AI Technical Summary
The safety control of existing automated equipment mainly relies on PLC programs and light gratings. There is a risk of safety failure due to programming errors or PLC malfunctions, resulting in a low level of safety.
Design an electrical hardware safety circuit for automated equipment, including an emergency stop safety relay, a door lock safety relay, and a light curtain safety relay. Multi-level safety is achieved through hierarchical control of these relays, with emergency stop being the highest level, ensuring hardware control of each level of safety relay.
It achieves multi-level safety control at the hardware level. The emergency stop button can immediately cut off the PLC output and equipment power, and the safety door lock and light curtain can cut off the power step by step to ensure that the equipment stops immediately in abnormal situations, thus improving the safety level.
Smart Images
Figure CN223582348U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to electrical safety technical field, specifically, relate to a kind of electrical hardware safety loop of automation equipment. BACKGROUND
[0002] In the current parts processing field, during processing into finished product, multiple processes are needed, in order to improve work efficiency, usually using automation equipment for processing.And in the processing process, to ensure the stability of each process, when abnormal state occurs, the program in PLC will be emergency stop, or after personnel enters the workbench, the grating in PLC can detect, slow down or stop work will be made.
[0003] But this only guarantees safety in program, if program is written wrong or PLC is wrong, the whole device can still cause safety failure to cause personnel injury. UTILITY MODEL CONTENT
[0004] The technical problem to be solved by the utility model is that the prior art only has emergency stop and grating control in program, and the safety level is low, to overcome the defects of the above prior art, the utility model provides a kind of electrical hardware safety loop of automation equipment.
[0005] The utility model provides a kind of electrical hardware safety loop of automation equipment, including emergency stop safety relay, door lock safety relay and grating safety relay;
[0006] The input end of the emergency stop safety relay is electrically connected with power supply, the output end of the emergency stop safety relay is respectively electrically connected with total gas source on-off electromagnetic valve, PLC output power supply and device external servo driver STO, the emergency stop button for cutting off the power supply of door lock safety relay and total gas source on-off electromagnetic valve, PLC output power supply and device external servo driver STO is equipped on the emergency stop safety relay;
[0007] The output end of the emergency stop safety relay is respectively electrically connected with pilot valve on-off electromagnetic valve, device internal servo driver STO, valve island power supply and robot control cabinet STO through door lock safety relay, the safety door lock for cutting off the power supply of grating safety relay and pilot valve on-off electromagnetic valve, device internal servo driver STO, valve island power supply and robot control cabinet STO is equipped on the door lock safety relay;
[0008] The output end of the door lock safety relay is electrically connected with motor power supply through grating safety relay, the safety grating for cutting off motor power supply is equipped on the grating safety relay.
[0009] Compared with the prior art, the electrical hardware safety loop of the automatic device has the following advantages: the emergency stop button triggers the STO function of cutting off the output power supply of the PLC, the total gas source and the motor outside the device, the safety door lock triggers the STO function of cutting off the power supply of the pilot valve and the valve island and the motor inside the device, the safety grating triggers the motor power supply, the condition trigger of the upper level safety relay affects the safety relay itself and all the following levels, and the safety condition trigger of the next level does not affect the upper level, safety is realized from the circuit hardware, and multiple levels of safety are provided, the emergency stop is the highest level, and the safety of each level is effectively ensured.
[0010] In a possible implementation, the power supply ends of the emergency stop safety relay are respectively electrically connected with the power supply ends; one power supply end of the door lock safety relay is electrically connected with the output end of the emergency stop safety relay, and the other power supply end of the door lock safety relay is connected with the 0V power supply; one power supply end of the grating safety relay is electrically connected with the output end of the door lock safety relay, and the other power supply end of the grating safety relay is connected with the 0V power supply.
[0011] Compared with the prior art, whether the power supply end of the next level safety relay is powered is controlled through the output end of the upper level safety relay, the next level safety relay is realized without program control, and the circuit is simple and convenient.
[0012] In a possible implementation, the emergency stop button is associated with the emergency stop safety relay, the safety door lock is associated with the door lock safety relay, and the safety grating is associated with the grating safety relay.
[0013] Compared with the prior art, the safety devices at each level are associated with the corresponding safety relays, and the control is facilitated.
[0014] In a possible implementation, the power supply is a 24V DC power supply. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a circuit diagram of the electrical hardware safety loop of the automatic device.
[0016] Figure 2 It is a working platform schematic diagram of the electrical hardware safety loop of the automatic device.
[0017] Figure 3 It is a gas circuit connection diagram of the electrical hardware safety loop of the automatic device.
[0018] MARK NUMBER EXPLANATION:
[0019] 1 - power supply; 2 - emergency stop safety relay; 3 - emergency stop button; 4 - safety door lock; 5 - door lock safety relay; 6 - safety light barrier; 7 - light barrier safety relay; 8 - total gas source on-off electromagnetic valve; 9 - PLC output power supply; 10 - external servo driver STO of equipment; 11 - pilot valve on-off electromagnetic valve; 12 - internal servo driver STO of equipment; 13 - valve island power supply; 14 - robot control cabinet STO; 15 - motor power supply;
[0020] 101 - plant gas source; 102 - pneumatic three-way component; 103 - pilot valve gas supply; 104 - pilot valve; 105 - pilot gas of external pilot valve island; 106 - air cylinder; 107 - air cylinder gas supply; 108 - external pilot valve island; 109 - main gas of external pilot valve island. DETAILED DESCRIPTION
[0021] First of all, those skilled in the art should understand that these embodiments are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can adjust them as needed in order to adapt to specific application occasions.
[0022] In the description of the embodiments of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to specific circumstances.
[0023] The present application will be further described in detail below in combination with the drawings and specific embodiments.
[0024] Referring to Figure 1 As shown in the drawings, the embodiments of the present application disclose an electrical hardware safety loop of an automatic equipment, which comprises an emergency stop safety relay 2, a door lock safety relay 5 and a light barrier safety relay 7.
[0025] The input end of the emergency stop safety relay 2 is electrically connected with the power supply 1, and the output end of the emergency stop safety relay 2 is electrically connected with the total gas source on-off electromagnetic valve 8, the PLC output power supply 9 and the external servo driver STO 10 of equipment respectively, and the emergency stop safety relay 2 is provided with an emergency stop button 3 for cutting off the power supply of the door lock safety relay 5, the total gas source on-off electromagnetic valve 8, the PLC output power supply 9 and the external servo driver STO 10 of equipment;
[0026] The output end of the emergency stop safety relay 2 is electrically connected with the pilot valve on-off electromagnetic valve 11, the in-plant servo driver STO 12, the valve island power supply 13 and the robot control cabinet STO 14 through the door lock safety relay 5, and the door lock safety relay 5 is provided with a safety door lock 4 for cutting off the power supply of the grating safety relay 7 and the pilot valve on-off electromagnetic valve 11, the in-plant servo driver STO 12, the valve island power supply 13 and the robot control cabinet STO 14.
[0027] The output end of the door lock safety relay 5 is electrically connected with the motor power supply 15 through the grating safety relay 7, and the grating safety relay 7 is provided with a safety grating 6 for cutting off the motor power supply 15.
[0028] The emergency stop button 3 triggers the STO function of cutting off the output power supply of the PLC, the total gas source and the out-plant motor, the safety door lock button 4 triggers the STO function of cutting off the power supply of the pilot valve and the valve island and the in-plant motor, the safety grating button 6 triggers the cutting off of the motor power supply, the triggering of the safety condition of the next level will not affect the previous level, and the safety is realized from the circuit hardware, and the safety is divided into multiple levels, the emergency stop is the highest level, and the safety of each level is effectively ensured.
[0029] The two ends of the power supply of the emergency stop safety relay 2 are electrically connected with the two ends of the power supply 1; one end of the power supply of the door lock safety relay 5 is electrically connected with the output end of the emergency stop safety relay 2, and the other end of the power supply of the door lock safety relay 5 is connected with the power supply 0V; one end of the power supply of the grating safety relay 7 is electrically connected with the output end of the door lock safety relay 5, and the other end of the power supply of the grating safety relay 7 is connected with the power supply 0V.
[0030] The output end of the previous level safety relay is used to control whether the power supply end of the next level safety relay is powered, the next level safety relay is realized without program control, and the circuit is simple and convenient.
[0031] Referring to Figure 2 In the embodiment, the emergency stop button 3 is associated with the emergency stop safety relay 2, the safety door lock 4 is associated with the door lock safety relay 5, and the safety grating button 6 is associated with the grating safety relay 7.
[0032] The safety devices of each level are associated with the corresponding safety relays, and the control is convenient.
[0033] In the embodiment, the power supply 1 is a 24V direct current power supply.
[0034] The embodiment improves the safety of the hardware from the circuit. First, the safety is hierarchical, the emergency stop is the highest level of safety, the safety door lock is the second, the safety light curtain is the third, and each corresponds to a safety relay. The contact of the safety relay of the upper level controls the power supply of the safety relay of the lower level.
[0035] Referring to Figure 3 As shown in the figure, on the air circuit, the factory gas source 101 is in communication with the pneumatic three-way piece 102 first end controlled by the safety circuit, the pneumatic three-way piece 102 second end is in communication with the pilot valve 104 controlled by the safety circuit through the pilot valve gas supply 103, the pneumatic three-way piece 102 third end is in communication with the outer pilot valve island 108 through the main gas 109 of the outer pilot valve island, the outer pilot valve island 108 is in communication with the air cylinder 106 through the air cylinder gas supply 107, and the outer pilot valve island 108 is also in communication with the pilot valve 104 through the pilot gas 105 of the outer pilot valve island.
[0036] When the safety door is opened on the air circuit, the safety circuit will cut off the pilot gas 105 of the outer pilot valve island, but not the main gas 109 of the outer pilot valve island, and all the air cylinders will complete the current stroke action and then stop, completing the current process. The slow opening of the door will not cause safety problems.
[0037] When the emergency stop button 3 is pressed on the air circuit, the circuit will cut off the main gas 109 of the outer pilot valve island and the pilot gas 105 of the outer pilot valve island at the same time, and all the air cylinder actions will be immediately stopped.
[0038] In the description of the embodiments of the present application, it should be noted that in the description of the present application, the terms indicating the direction or position relationship are based on the direction or position relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or member must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.
[0039] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "in this embodiment", "specific examples", or "some examples" means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. Furthermore, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.
[0040] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements within the technical scope disclosed by the present application can be easily conceived by the person skilled in the art, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. An electrical hardware safety loop of an automated device, characterized in that, The emergency stop safety relay (2), the door lock safety relay (5) and the grating safety relay (7) are included. The input end of the emergency stop safety relay (2) is electrically connected with the power supply (1), the output end of the emergency stop safety relay (2) is electrically connected with the total gas source on-off electromagnetic valve (8), the PLC output power supply (9) and the external servo driver STO (10) of equipment respectively, and the emergency stop button (3) for cutting off the power supply of the door lock safety relay (5) and the total gas source on-off electromagnetic valve (8), the PLC output power supply (9) and the external servo driver STO (10) of equipment is arranged on the emergency stop safety relay (2). The output end of the emergency stop safety relay (2) is electrically connected with the pilot valve on-off electromagnetic valve (11), the internal servo driver STO (12) of equipment, the valve island power supply (13) and the robot control cabinet STO (14) through the door lock safety relay (5), the safety door lock (4) for cutting off the power supply of the grating safety relay (7) and the pilot valve on-off electromagnetic valve (11), the internal servo driver STO (12) of equipment, the valve island power supply (13) and the robot control cabinet STO (14) is arranged on the door lock safety relay (5). The output end of the door lock safety relay (5) is electrically connected with the motor power supply (15) through the grating safety relay (7), and the safety grating (6) for cutting off the motor power supply (15) is arranged on the grating safety relay (7).
2. The electrical hardware safety circuit of the automation equipment according to claim 1, wherein, the power supply of the emergency stop safety relay (2) is electrically connected with the power supply (1) at both ends; one end of the power supply of the door lock safety relay (5) is electrically connected with the output end of the emergency stop safety relay (2), and the other end of the power supply of the door lock safety relay (5) is connected with the 0V of the power supply (1); one end of the power supply of the grating safety relay (7) is electrically connected with the output end of the door lock safety relay (5), and the other end of the power supply of the grating safety relay (7) is connected with the 0V of the power supply (1).
3. An electrical hardware safety circuit for an automated device according to claim 1, wherein, The emergency stop button (3) is connected in parallel with the emergency stop safety relay (2), the safety door lock (4) is connected in parallel with the door lock safety relay (5), and the safety grating (6) is connected in parallel with the grating safety relay (7).
4. An electrical hardware safety circuit for an automated device according to claim 1, wherein, The power supply (1) is a 24V direct current power supply (1).