Safety relay loop universal for single channel and double channels
By introducing the fourth forced guide contact into the safety relay circuit, single and double channel switching is achieved, solving the problem that existing safety relays can only be used in two channels, and improving versatility and user experience.
Patent Information
- Application Number
- CN202422292339.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-19
AI Technical Summary
Existing safety relays can only be used in dual-channel situations and cannot be used when encountering single-channels, which are not versatile and affects the user experience.
A single and double channel universal safety relay circuit is designed, and the fourth forced guide contact is set at one end of the second forced guide relay to realize dual-channel and single-channel switching, and different connection methods of the first and second forced guide contacts are used to adapt to different channel modes.
It realizes the versatility of safety relays in single-channel and dual-channel scenarios, and enhances the user experience.
Smart Images
Figure CN223140670U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of safety relays, and particularly to a safety relay circuit that is universal for single and double channels.
Background Art
[0002] The safety relays in the prior art are usually of the double-channel signal type. Only when the signals of both channels are normal can the safety relay work properly; if the signal of any one channel is disconnected, the safety relay will stop outputting, and it can resume normal operation only after the signals of both channels are normal and reset.
[0003] The safety relays in the prior art can only be used in the case of double channels and cannot be used in the case of single channels, with poor universality and being unfavorable to the user experience.
Content of the Utility Model
[0004] In order to overcome the above problems, the utility model proposes a safety relay circuit that is universal for single and double channels and can effectively solve the above problems.
[0005] A technical solution provided by the utility model to solve the above technical problems is: to provide a safety relay circuit that is universal for single and double channels, including a first forced guiding relay, a second forced guiding relay, and a start logic module, where the first forced guiding relay and the second forced guiding relay are respectively connected to the start logic module; one end of the first forced guiding relay is connected to an output line, a second forced guiding contact is provided at the other end of the first forced guiding relay, a first forced guiding contact is connected to an input line, and the first forced guiding contact is connected and conducted with the second forced guiding contact; a third forced guiding contact is provided at one end of the second forced guiding relay, a fourth forced guiding contact is provided at the other end of the second forced guiding relay, a fifth forced guiding contact is connected to the output line, and the third forced guiding contact is connected and conducted with the fifth forced guiding contact.
[0006] Preferably, the fourth forced guiding contact is connected and conducted with the first forced guiding contact.
[0007] Preferably, the fourth forced guiding contact is connected and conducted with the second forced guiding contact.
[0008] Preferably, one end of the start logic module is connected to the second forced guiding relay.
[0009] Preferably, a sixth forced guiding contact is connected to the other end of the start logic module, and the sixth forced guiding contact is connected and conducted with the second forced guiding contact.
[0010] Compared with the prior art, in the safety relay circuit that is universal for single and dual channels of the present utility model, a fourth forced guiding contact is provided at one end of the second forced guiding relay. When the fourth forced guiding contact is connected and conducts with the first forced guiding contact, it is applicable to the dual-channel mode; when the fourth forced guiding contact is connected and conducts with the second forced guiding contact, it is applicable to the single-channel mode. The safety relay circuit that is universal for single and dual channels of the present utility model can realize the switching and use of dual channels and single channels, is suitable for single and dual-channel usage scenarios, has higher versatility, and is conducive to improving the user experience.
Explanation of Drawings
[0011] Figure 1 It is a schematic structural diagram of the safety relay circuit that is universal for single and dual channels of the present utility model;
[0012] Figure 2 It is a schematic diagram of the dual-channel mode of the safety relay circuit that is universal for single and dual channels of the present utility model;
[0013] Figure 3 It is a schematic diagram of the single-channel mode of the safety relay circuit that is universal for single and dual channels of the present utility model.
Detailed Embodiment
[0014] In order to make the purpose, technical solution and advantages of the present utility model clearer, the following further details the present utility model in conjunction with the drawings and implementation examples. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0015] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only relative positions on the specified view, rather than absolute positions.
[0016] In addition, the descriptions such as "first" and "second" in the present utility model are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, "a plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0017] Please refer to Figures 1 to 3 , the safety relay circuit that is universal for single and dual channels of the present utility model includes a first forced guiding relay 10, a second forced guiding relay 20 and a start logic module 30, and the first forced guiding relay 10 and the second forced guiding relay 20 are respectively connected to the start logic module 30.
[0018] One end of the first forced guiding relay 10 is connected to the output line. A second forced guiding contact 12 is provided at the other end of the first forced guiding relay 10. The input line is connected with a first forced guiding contact 11, and the first forced guiding contact 11 is connected and conducted with the second forced guiding contact 12.
[0019] One end of the second forced guiding relay 20 is provided with a third forced guiding contact 22, and the other end of the second forced guiding relay 20 is provided with a fourth forced guiding contact 23. The output line is connected with a fifth forced guiding contact 21, and the third forced guiding contact 22 is connected and conducted with the fifth forced guiding contact 21.
[0020] In the single - and dual - channel universal safety relay circuit of the present utility model, by providing a fourth forced guiding contact 23 at one end of the second forced guiding relay 20, when the fourth forced guiding contact 23 is connected and conducted with the first forced guiding contact 11, it is applicable to the dual - channel mode; when the fourth forced guiding contact 23 is connected and conducted with the second forced guiding contact 12, it is applicable to the single - channel mode. The single - and dual - channel universal safety relay circuit of the present utility model can realize the switching between the dual - channel and the single - channel for use, is suitable for single - and dual - channel usage scenarios, has higher versatility, and is conducive to enhancing the user's usage experience.
[0021] One end of the start logic module 30 is directly connected to the second forced guiding relay 20.
[0022] The other end of the start logic module 30 is connected with a sixth forced guiding contact 31, and the sixth forced guiding contact 31 is connected and conducted with the second forced guiding contact 12.
[0023] In practical applications, safety relays can be used in a variety of scenarios, such as emergency stop, safety door monitoring, two - hand operation, etc. They can prevent electric shock, equipment damage, fire and explosion, and provide an emergency stop function. The design and use of safety relays are crucial for ensuring the safety of equipment and personnel in industrial automation and electrical control systems.
[0024] The main functions of safety relays include:
[0025] Prevent electric shock: By monitoring the circuit state, once it detects that a human body touches a live body, it immediately cuts off the power supply to prevent electric shock accidents.
[0026] Prevent equipment damage: When a fault or abnormality occurs in the system, it timely cuts off the power supply to avoid equipment damage caused by over - current, over - voltage, etc.
[0027] Prevent fire and explosion: In specific environments, such as the petroleum and chemical industries, by monitoring changes in environmental parameters, it timely discovers potential hazards and takes measures to prevent accidents.
[0028] Provide an emergency stop function: When a failure or accident occurs in the equipment, immediately cut off the power supply and stop the operation of the equipment to ensure the safety of personnel and equipment.
[0029] The application fields of safety relays are very extensive, including the rubber and plastic industries, steel industry, automotive industry, machine tool industry, power industry, glass manufacturing industry, packaging industry, subway industry, electronic manufacturing industry, pharmaceutical industry, etc. In these fields, safety relays play an important role in protecting the safety of equipment and personnel. With the progress of technology, the functions and performance of safety relays are also constantly improving, and they will play an important role in more fields in the future.
[0030] The forced-guided relay is a specially designed relay, which is different from traditional relays in structure. The armature of this relay can tightly connect the normally open and normally closed contacts. Due to this reliable interlock connection, the normally open and normally closed contacts cannot be closed simultaneously. For example, if a normally closed contact is welded, the normally open contact cannot be closed and will always remain in the normally open state, and vice versa. This design makes the forced-guided relay very useful in safety circuits. They are often used in combination with light curtains, interlock switches, and emergency stop switches to control the output, and can be used to expand the output of safety relay modules and safety controllers.
[0031] Forced-guided relays are widely used in occasions that require high safety, such as production lines, robots, elevators, electrical control cabinets, CNC machine tools, motion control systems, lighting, building systems, solar energy, HVAC, and a series of safety applications, etc. They provide a reliable solution to ensure the safe control of the circuit at critical moments.
[0032] The relationship between start-up logic and safety relays can be understood from two aspects: one is in terms of technical implementation, and the other is in terms of application purpose.
[0033] Technical implementation: Start-up logic usually refers to a series of programs and steps that a system or equipment executes when starting up. These steps ensure that the system can start safely in a predetermined order. The safety relay plays an important role in this process because it can ensure that the safety conditions in the start-up logic are met. For example, in industrial automation, safety relays can be used in safety-related start-up logic such as emergency stop and safety door monitoring to ensure that all safety conditions are verified before starting, such as whether the safety door is closed and whether the emergency stop button is triggered.
[0034] Purpose of application: The purpose of the startup logic is to ensure that the system can enter the working state smoothly and safely. The design and use of the safety relay are also to improve the safety of the system. In some application scenarios, such as the startup of mechanical equipment, the safety relay can prevent the equipment from starting accidentally when the safety conditions are not met, thus avoiding possible safety accidents. Through its forced guiding contact structure, the safety relay ensures that even in the case of faults such as contact fusion, it can maintain a safe state and will not cause accidental startup or stop due to faults.
[0035] In summary, the relationship between the startup logic and the safety relay is complementary. The startup logic requires the safety relay to ensure the safety of the startup process, and the design and use of the safety relay are also to meet the safety requirements in the startup logic. The two work together to ensure the safety and reliability of the system or equipment.
[0036] Compared with the prior art, in the safety relay circuit with universal single and double channels of the present utility model, a fourth forced guiding contact 23 is arranged at one end of the second forced guiding relay 20. When the fourth forced guiding contact 23 is connected and conducted with the first forced guiding contact 11, it is applicable to the double-channel mode; when the fourth forced guiding contact 23 is connected and conducted with the second forced guiding contact 12, it is applicable to the single-channel mode. The safety relay circuit with universal single and double channels of the present utility model can realize the switching and use of double channels and single channels, is suitable for single and double channel usage scenarios, has higher versatility, and is beneficial to improving the user experience.
[0037] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any modifications, equivalent replacements, and improvements made within the concept of the present utility model shall be included in the patent protection scope of the present utility model.
Claims
1. A safety relay circuit that is common for single and dual channels, characterized in that, It includes a first forced guiding relay, a second forced guiding relay and a starting logic module, and the first forced guiding relay and the second forced guiding relay are respectively connected to the starting logic module; One end of the first forced guiding relay is connected to an output line, a second forced guiding contact is arranged at the other end of the first forced guiding relay, a first forced guiding contact is connected to an input line, and the first forced guiding contact is connected and conducted with the second forced guiding contact; One end of the second forced guiding relay is provided with a third forced guiding contact, the other end of the second forced guiding relay is provided with a fourth forced guiding contact, an output line is connected with a fifth forced guiding contact, and the third forced guiding contact is connected and conducted with the fifth forced guiding contact.
2. The single- and double-channel universal safety relay circuit according to claim 1, characterized in that, The fourth forced guiding contact is connected and conducted with the first forced guiding contact.
3. The single- and double-channel universal safety relay circuit according to claim 1, characterized in that, The fourth forced guiding contact is connected and conducted with the second forced guiding contact.
4. The single- and double-channel universal safety relay circuit according to claim 1, characterized in that One end of the starting logic module is connected to the second forced guiding relay.
5. The single- and double-channel universal safety relay circuit according to claim 1, characterized in that, The other end of the starting logic module is connected with a sixth forced guiding contact, and the sixth forced guiding contact is connected and conducted with the second forced guiding contact.