Safety interlocking control system of production equipment
By adopting an active safety interlocking control system on production equipment and using pressure-sensitive components and photoelectric detection components to detect the position and movement direction of the operator, the problem that traditional safety control strategies cannot meet the safety requirements of production scenarios is solved, and safety and adaptability are improved.
Patent Information
- Application Number
- CN202420687409.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-07
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-04-07
AI Technical Summary
Traditional single safety control strategy based on photoelectric induction and photoelectric control cannot meet the safety standards and safety requirements of actual operation in production scenarios, especially in complex operations, a single safety device cannot adapt to the safety requirements of production equipment, which may lead to safety accidents.
The safety interlocking control system of production equipment based on active safety interlock is adopted, including pressure-sensitive components, photoelectric detection components and controllers. Through the cooperation of the pressure-sensitive components and photoelectric detection components, whether the operator is in the operating area and determines its movement direction to actively determine whether the operator is in a dangerous state.
It improves the adaptability and practical application capabilities of the safety interlocking control system, reduces the possibility of safety injuries, and reduces the severity of injuries.
Smart Images
Figure CN222825812U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electrical control systems, in particular to a safety interlocking control system for production equipment. Background Art
[0002] The safety of a production workshop involves production efficiency and safety assurance, and its requirements are becoming increasingly stringent and are receiving more and more attention. However, during on-site operations in the workshop, taking film production and winding processes as an example, the operation of the equipment is not just a single action. For example, when photoelectric control personnel enter a dangerous area, some equipment and corresponding operating process personnel must operate on this equipment. Obviously, the equipment cannot stop running just because someone enters the area. Therefore, traditional safety control strategies based solely on photoelectric sensing and photoelectric control cannot meet the safety standards and safety requirements of actual operations in production scenarios.
[0003] A single safety device, for example, when we enter the equipment area, the equipment must stop and can only be operated after the personnel leave. A single safety device cannot meet the safety requirements of production equipment. For these complex operations that a single safety device cannot adapt to, passive safety interlocks are usually used on the equipment, such as emergency pull ropes, limit switches, etc. However, in an emergency, the staff may not be able to trigger the emergency pull rope or limit switch in time, resulting in safety accidents, which is undesirable. Utility Model Content
[0004] In view of the technical problems existing in the safety interlock control system in the prior art, the first aspect of the utility model proposes a production equipment safety interlock control system based on active safety interlock, comprising:
[0005] A pressure-sensitive component is arranged below the operating area on one side of the device, and is used to detect the pressure of an operator in the operating area on the pressure-sensitive component, and trigger an action signal when the pressure detected by the pressure-sensitive component is greater than a preset value;
[0006] A photoelectric detection component is arranged on both sides of the operating area on one side of the device, and the photoelectric detection component is used to detect whether the operator is in the operating area, and triggers an action signal when the photoelectric detection component detects that there is an obstruction in the preset area;
[0007] A controller, electrically connected to the pressure-sensitive component and the photoelectric detection component, and configured to receive action signals of the pressure-sensitive component and the photoelectric detection component;
[0008] The pressure-sensitive component is configured to extend to a non-operating area on one side of the device away from the operating area, and the controller is configured to trigger an alarm action when an action signal of the pressure-sensitive component disappears before an action signal of the photoelectric detection component.
[0009] Preferably, the pressure-sensitive component includes a plurality of pressure sensors distributed in a matrix.
[0010] Preferably, the maximum distance between every two of the pressure sensors is less than five centimeters.
[0011] Preferably, the pressure sensitive component is configured to be in a plate shape.
[0012] Preferably, the pressure-sensitive component is a flexible board, and the pressure-sensitive component includes a pressure sensor layer in the middle and two flexible covering layers in the upper and lower layers.
[0013] Preferably, the photoelectric detection component comprises a through-beam grating sensor, and a detection area of the through-beam grating sensor does not intersect with a non-operating area.
[0014] Preferably, the detection area of the opposing grating sensor is in a height area between 30-120 cm above the pressure-sensitive component.
[0015] Preferably, it also includes an emergency switch or a pull rope, which is electrically connected to the controller. When the emergency switch or the pull rope is triggered, the controller triggers an alarm action.
[0016] Compared with the prior art, the full interlock control system proposed in the utility model is an active safety interlock control system. By setting a pressure-sensitive component and a photoelectric detection component, through the cooperation of the pressure-sensitive component and the photoelectric detection component, it can not only detect whether the operator is in the operating area, but also judge the direction of the operator entering and leaving the operating area, and can actively judge whether the operator is in danger, thereby improving the adaptability of the active safety interlock. Therefore, the safety interlock control system has stronger adaptability and practical application capabilities, which can reduce the possibility of safety injuries and reduce the severity of injuries. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The accompanying drawings are not intended to be drawn to scale. In the accompanying drawings, each identical or approximately identical component shown in each figure may be represented by the same reference numeral. For clarity, not every component is labeled in each figure. Now, embodiments of various aspects of the utility model will be described by way of example and with reference to the accompanying drawings.
[0018] Figure 1 It is a structural schematic diagram of a production equipment safety interlock control system shown in the utility model.
[0019] Figure 2a It is a schematic diagram of the controller shown in the utility model judging that a person normally enters a working area.
[0020] Figure 2b It is a schematic diagram of the controller shown in the utility model judging that a person normally leaves the working area.
[0021] Figure 2c It is a schematic diagram of the controller shown in the utility model determining an abnormal signal. DETAILED DESCRIPTION
[0022] In order to better understand the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.
[0023] Combination Figure 1 As shown, the production equipment safety interlock control system proposed by the utility model is particularly used in the field of plastic production, such as the refining rollers in plastic refining equipment, or in occasions with a pressed-in jaw and requiring the operator to stand to operate, such as Figure 1 As shown, a jaws is formed between the first roller 11 and the second roller 12. If an operator must stand on one side of the roller to manually operate the material on the roller, the first roller 11 and the second roller 12 may roll the operator between the two rollers.
[0024] At present, the emergency switch or pull rope is usually set on one side of the equipment. When the operator is in danger, it is highly likely that the emergency switch or pull rope cannot be operated. When there are no other operators around, safety accidents are inevitable. Therefore, the utility model proposes a production equipment safety interlock control system, which can actively trigger alarms and shutdowns to avoid the above safety hazards.
[0025] Combination Figure 1 As shown, the safety interlock control system includes a pressure-sensitive component 20, a photoelectric detection component 30 and a controller 40. The pressure-sensitive component 20 and the photoelectric detection component 30 are necessary conditions for each other to detect whether the operator is in the operating area 101, and by obtaining signals from both the pressure-sensitive component 20 and the photoelectric detection component 30, the direction in which the operator moves in the operating area can be obtained to determine the trend of the operator's movement. Therefore, movement from the operating area 101 to the non-operating area 102 is allowed, while movement from the operating area 101 to the equipment direction is prohibited. At this time, an alarm and shutdown should be triggered to ensure safety.
[0026] Among them, the pressure-sensitive component 20 is arranged below the operating area 101 on one side of the device. The pressure-sensitive component 20 is used to detect the pressure of the operator in the operating area 101 on the pressure-sensitive component 20, and triggers an action signal when the pressure detected by the pressure-sensitive component 20 is greater than a preset value; the photoelectric detection component 30 is arranged on both sides of the operating area 101 on one side of the device. The photoelectric detection component 30 is used to detect whether the operator is in the operating area 101, and triggers an action signal when the photoelectric detection component 30 detects an obstruction in the preset area; the controller 40 is electrically connected to the pressure-sensitive component 20 and the photoelectric detection component 30, and is used to receive the action signals of the pressure-sensitive component 20 and the photoelectric detection component 30.
[0027] In this way, the pressure-sensitive component 20 determines whether there is an operator in the operating area 101 by detecting the pressure in the operating area 101, and the photoelectric detection component 30 performs photoelectric detection on the operating area 101 to determine whether there is an operator in the operating area 101. The control receives the electrical signals of the pressure-sensitive component 20 and the photoelectric detection component 30 and uses them to determine the movement direction of the operator.
[0028] Specific, combined Figure 2a -2c, the pressure-sensitive component 20 is configured to extend to the non-operating area 102 on the side of the operating area 101 away from the device. In this way, when the operator moves from the operating area 101 to the non-operating area 102, the pressure-sensitive component 20 still transmits an electrical signal to the controller 40, but the photoelectric detection component 30 loses the action signal at this time; on the contrary, if the operator is caught in the equipment in the operating area 101, the torso is still in the operating area 101, but the feet are off the ground. At this time, the pressure-sensitive component 20 loses the action signal. Therefore, the controller 40 is configured to trigger an alarm action when the action signal of the pressure-sensitive component 20 disappears before the action signal of the photoelectric detection component 30.
[0029] Therefore, the difference between the present application and the prior art is that the direction in which the operator moves in the operating area 101 can be determined by the order in which the pressure-sensitive component 20 and the photoelectric detection component 30 generate and lose signals, rather than just determining whether the operator is in the operating area 101. Through active early warning, the occurrence of safety accidents can be effectively avoided.
[0030] In an optional embodiment, the pressure-sensitive component 20 includes a plurality of pressure sensors distributed in a matrix. Preferably, the maximum distance between each two pressure sensors is less than five centimeters. In this way, as long as the operator stands on the surface of the pressure-sensitive component 20, the pressure sensor can generate a pressure signal to ensure the reliability of the detection signal.
[0031] In an optional embodiment, the pressure sensitive component 20 is configured to be in a plate shape. Preferably, the pressure sensitive component 20 is a flexible plate, and the pressure sensitive component 20 includes a pressure sensor layer in the middle and two flexible coating layers in the upper and lower layers, and the flexible coating layer can be a rubber layer.
[0032] In this way, the laying of the pressure-sensitive component 20 is more convenient and has better wear resistance.
[0033] Further, the photoelectric detection component 30 includes a through-beam grating sensor, and the detection area of the through-beam grating sensor does not intersect with the non-operating area 102 .
[0034] In this way, it can be avoided that the operator is still detected by the photoelectric detection component 30 after entering the non-operation area 102 .
[0035] Preferably, the detection area of the through-beam grating sensor is in the height area between 30-120 cm above the pressure-sensitive component 20. In this way, this area corresponds to the operator's knee joint to abdomen area, which is relatively difficult to move. Therefore, when the pressure-sensitive component 20 cannot detect a signal, but the photoelectric detection component 30 can still detect it, it is likely that the operator passively moves toward the device, and the probability of danger is high.
[0036] Furthermore, the safety interlock control system also includes an emergency switch or a pull rope, which is electrically connected to the controller 40. When the emergency switch or the pull rope is triggered, the controller 40 triggers an alarm action.
[0037] In this way, the safety of the operator can be further guaranteed. When there are other people around, they can operate the emergency switch or pull the rope to trigger the alarm and shut down the equipment to avoid danger.
[0038] In combination with the above embodiments, the safety interlock control system proposed by the utility model is equipped with a pressure-sensitive component and a photoelectric detection component. Through the cooperation of the pressure-sensitive component and the photoelectric detection component, it can not only detect whether the operator is in the operating area, but also determine the direction of the operator entering and leaving the operating area, and can actively determine whether the operator is in danger. Therefore, the safety interlock control system has stronger adaptability and practical application capabilities, which can reduce the possibility of safety injuries and reduce the severity of injuries.
[0039] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.
Claims
1. A production equipment safety interlock control system, characterized in that: include: A pressure-sensitive component (20) is arranged below an operating area (101) on one side of the device, the pressure-sensitive component (20) being used to detect pressure applied to the pressure-sensitive component (20) by an operator in the operating area (101), and triggering an action signal when the pressure detected by the pressure-sensitive component (20) is greater than a preset value; A photoelectric detection component (30) is arranged on both sides of an operating area (101) on one side of the device, the photoelectric detection component (30) is used to detect whether an operator is in the operating area (101), and triggers an action signal when the photoelectric detection component (30) detects that there is an obstruction in the preset area; A controller (40) electrically connected to the pressure-sensitive component (20) and the photoelectric detection component (30), and configured to receive action signals of the pressure-sensitive component (20) and the photoelectric detection component (30); The pressure-sensitive component (20) is configured to extend toward the operating area (101) away from the non-operating area (102) on one side of the device, and the controller (40) is configured to trigger an alarm action when an action signal of the pressure-sensitive component (20) disappears before an action signal of the photoelectric detection component (30).
2. The production equipment safety interlock control system according to claim 1, characterized in that: The pressure-sensitive component (20) comprises a plurality of pressure sensors distributed in a matrix.
3. The production equipment safety interlock control system according to claim 2, characterized in that: The maximum distance between any two of the pressure sensors is less than five centimeters.
4. The production equipment safety interlock control system according to claim 1, characterized in that: The pressure sensitive component (20) is configured in a plate shape.
5. The production equipment safety interlock control system according to claim 4, characterized in that: The pressure-sensitive component (20) is a flexible board, and comprises a pressure sensor layer in the middle and flexible covering layers in the upper and lower layers.
6. The production equipment safety interlock control system according to claim 1, characterized in that: The photoelectric detection component (30) comprises a through-beam grating sensor, and a detection area of the through-beam grating sensor does not intersect with a non-operating area (102).
7. The production equipment safety interlock control system according to claim 6, characterized in that: The detection area of the opposing grating sensor is located in a height area between 30-120 cm above the pressure-sensitive component (20).
8. The production equipment safety interlock control system according to claim 1, characterized in that: It also includes an emergency switch or a pull rope, which is electrically connected to the controller (40). When the emergency switch or the pull rope is triggered, the controller (40) triggers an alarm action.