Protective door for machine tool

Abstract

The protective door for the machine tool comprises a protective door assembly, the protective door assembly comprises an upper door frame body and a lower door frame body, two sets of symmetrically-distributed opening and closing doors are rotationally connected between the upper door frame body and the lower door frame body, and the upper door frame body and the lower door frame body are both in positioning connection with the opening and closing doors through built-in opening and closing electronic locks; the upper door frame body is connected with a human body sensor, a controller, a fire sensor, a camera and an audible and visual alarm, the lower door frame body is connected with a control switch, the opening and closing door is connected with an observation window, a fixing plate is connected between the upper door frame body and the lower door frame body, the fixing plate is connected with a moving rod through a cleaning electric push rod, the moving rod is connected with cleaning cloth, and the fixing plate is connected with a mounting frame. A fire extinguisher and a starting assembly are connected in the mounting frame, and the controller is electrically connected with a control device of the machine tool. The system has the beneficial effects that intelligent safety protection is achieved; real-time monitoring and fault early warning can be realized; the observation window can be conveniently cleaned; and the system has efficient emergency processing capability.

Description

Technical Field

[0001] The invention relates to the technical field of machine tool equipment, and in particular to a protective door for a machine tool. Background Art

[0002] In modern industrial production, machine tools are key equipment for manufacturing and processing, and their operating safety and stability are of vital importance. As an important part of machine tools, protective doors are responsible for protecting the safety of operators and maintaining the normal operating environment of machine tools. However, traditional machine tool protective doors have many functional limitations and are difficult to meet the complex and changing needs of today's industrial production.

[0003] From the perspective of safety protection, most traditional protective doors rely only on simple mechanical locking devices, and in actual operation, they cannot automatically sense the approach and departure of operators. This means that when operators need to enter and exit the machine tool operating area, they must manually open and close the protective door, which is not only cumbersome to operate, but also in an emergency, it may cause a safety accident due to failure to open the protective door in time. At the same time, during the operation of the machine tool, if the operator fails to completely close the protective door due to negligence, or the protective door is accidentally opened, the moving parts of the machine tool can easily cause harm to the operator. For example, in some high-speed machine tool processing scenarios, once a human body approaches an unclosed protective door, it is very likely to be drawn into the machine tool, causing a serious safety accident.

[0004] In terms of monitoring, traditional protective doors lack effective real-time monitoring methods. Operators cannot understand the specific operating conditions inside the machine tool at any time, such as the degree of tool wear, the processing accuracy of the workpiece, etc., and can only know after the processing is completed or during regular inspections. This makes it difficult to detect and take corresponding measures in time when the machine tool fails, which not only affects production efficiency, but may also result in the processing of a large number of unqualified products and increase production costs. Moreover, when abnormal conditions occur inside the machine tool, such as electric sparks caused by electrical short circuits, it is difficult to detect them in time due to the lack of real-time monitoring, thus burying safety hazards.

[0005] The observation window is an important window for operators to observe the internal working conditions of machine tools, but the observation window of traditional protective doors has obvious shortcomings in terms of cleaning. During the machining process of machine tools, a large amount of cutting fluid, debris and other pollutants will be generated. These substances can easily adhere to the observation window and affect the operator's line of sight. Traditional protective doors are usually not equipped with special cleaning devices. Operators can only wipe the observation window manually after stopping the machine, which not only consumes time and energy, but also affects the production progress. In addition, frequent manual wiping may also cause scratches on the surface of the observation window, further reducing the observation effect.

[0006] Emergency response capability is also a major shortcoming of traditional protective doors. When an emergency such as a fire occurs inside a machine tool, traditional protective doors cannot issue an alarm in time, let alone automatically take fire-fighting measures. This means that once a fire occurs, it often spreads rapidly, causing serious property losses and casualties. Moreover, due to the lack of an effective emergency response mechanism, when a fire occurs, the operator may be too flustered to take correct response measures in time, further exacerbating the severity of the accident.

[0007] In summary, traditional machine tool protective doors have many deficiencies in terms of safety, monitoring, cleaning, and emergency handling, and can no longer meet the needs of modern industrial production. Therefore, the development of a multifunctional and intelligent machine tool protective door is of great practical significance for improving the safety, production efficiency, and reliability of machine tools. Summary of the invention

[0008] In order to solve the above problems, especially to address the deficiencies in the prior art, the present invention provides a protective door for a machine tool that can solve the above problems.

[0009] To achieve the above purpose, the present invention adopts the following technical means:

[0010] A protective door for a machine tool, comprising a protective door assembly installed at a working observation port of the machine tool, the protective door assembly comprising an upper door frame and a lower door frame which are distributed up and down and connected to the machine tool, two groups of symmetrically distributed switch doors are rotatably connected between the upper door frame and the lower door frame, and the upper door frame and the lower door frame are both positioned and connected to the switch door through a built-in switch electronic lock;

[0011] The outer side of the upper door frame is connected to a human body sensor and a controller, the inner side of the upper door frame is connected to a fire sensor and a camera, and the top of the upper door frame is connected to an audible and visual alarm; the outer side of the lower door frame is connected to a control switch;

[0012] An observation window is embedded and connected to the side of the switch door, a fixing plate connected to the upper door frame and the lower door frame is provided on the inner side of the switch door, the fixing plate is connected to a moving rod arranged on one side of the observation window through a cleaning electric push rod, a cleaning cloth is connected to the corresponding side of the moving rod and the observation window, a mounting frame is connected to the side of the fixing plate away from the switch door, a fire extinguisher and a starting component for controlling the operation of the fire extinguisher are connected in the mounting frame;

[0013] The human body sensor, fire sensor, sound and light alarm, camera, controller, switch electronic lock, cleaning electric push rod, and starting component are all connected to an external power supply through a control switch, and the human body sensor, fire sensor, sound and light alarm, camera, switch electronic lock, cleaning electric push rod, and starting component are all electrically connected to the controller, and the controller is electrically connected to the control device of the machine tool.

[0014] A further solution of the present invention is that a protective cover connected to the upper door frame is provided on the outer side of the human body sensor.

[0015] A further solution of the present invention is that the human body sensor is an infrared sensor.

[0016] A further solution of the present invention is that the fire sensor is composed of a temperature and humidity sensor and a smoke sensor.

[0017] A further solution of the present invention is that the specific model of the controller is a controller of the STM32 series.

[0018] A further solution of the present invention is that a door handle is connected to the outer side of the switch door.

[0019] A further solution of the present invention is that the observation window is made of tempered glass.

[0020] A further solution of the present invention is that a bearing base is connected to the bottom of the installation frame, and the fire extinguisher is plugged into the bearing base.

[0021] A further solution of the present invention is that a positioning snap ring is connected to the side of the installation frame, and the positioning snap ring is movably engaged with the fire extinguisher.

[0022] A further solution of the present invention is that the starting component includes a control box connected to the top of the mounting frame, and a pressing electric push rod and a pulling electric push rod are connected to the control box, and the movable end of the pressing electric push rod is connected to a pressing cover, and the pressing cover corresponds to the pressing switch of the fire extinguisher, and the movable end of the pulling electric push rod is connected to a movable buckle through a pull rope, and the movable buckle is connected to the starting pull ring of the fire extinguisher, and the pressing electric push rod and the pulling electric push rod are both connected to an external power supply through a control switch, and the pressing electric push rod and the pulling electric push rod are both electrically connected to a controller.

[0023] Beneficial effects of the present invention:

[0024] 1. The present invention has intelligent safety protection. The linkage between the human body sensor and the switch electronic lock realizes the automatic opening and closing of the protective door, reducing the negligence and safety hazards that may be caused by manual operation. When the machine tool is working, the controller locks the switch door according to the signal of the machine tool control device, effectively preventing people from accidentally touching the running machine tool, significantly improving the safety during operation, reducing the probability of accidents, and ensuring the personal safety of operators.

[0025] 2. The present invention can monitor and warn of faults in real time. The built-in camera can record the working conditions inside the machine tool in real time. The operator can view the monitoring screen at any time through the controller and timely grasp the operating status of the machine tool, including the degree of wear of the tool, the processing accuracy of the workpiece and other key information. At the same time, the fire sensor can monitor the abnormal conditions inside the machine tool, such as fire hazards, in real time. Once an abnormality is detected, the signal is immediately transmitted to the controller, which triggers the sound and light alarm to sound an alarm, realizing early warning of faults, helping operators to take timely measures to avoid accidents, improve production efficiency and reduce production costs.

[0026] 3. The present invention can clean the observation window conveniently. In view of the inconvenience of cleaning the observation window of the traditional protective door, the present invention is provided with an automatic cleaning device consisting of a cleaning electric push rod, a moving rod and a cleaning cloth. When the observation window is stained and affects the line of sight, the operator only needs to start the cleaning electric push rod through the control switch to drive the moving rod to make the cleaning cloth wipe the observation window without stopping the machine for manual cleaning. This not only saves time and manpower, but also avoids scratches on the surface of the observation window due to frequent manual wiping, always maintains a good observation effect, and is convenient for the operator to observe the internal working status of the machine tool at any time.

[0027] 4. The present invention has efficient emergency response capabilities. In terms of emergency response, the protective door performs well. When the fire sensor detects a fire inside the machine tool, the controller will respond quickly. On the one hand, it will activate the sound and light alarm to alert the surrounding personnel; on the other hand, it will trigger the starting component of the fire extinguisher, so that the fire extinguisher will work automatically and put out the fire in time. This efficient emergency response mechanism can quickly control the fire in the early stage of the fire, effectively reduce property losses and casualties, and greatly improve the machine tool's ability to respond in emergency situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention;

[0029] Figure 2 The structure of the protective door assembly of the present invention is schematically shown. Figure 1 ;

[0030] Figure 3 The structure of the protective door assembly of the present invention is schematically shown. Figure 2 ;

[0031] Figure 4 It is a cross-sectional view of the upper door frame, the switch door, and the lower door frame of the present invention;

[0032] Figure 5 It is a schematic diagram of the connection between the moving rod and the cleaning cloth of the present invention;

[0033] Figure 6 It is a structural schematic diagram of the starting component of the present invention;

[0034] Reference numerals:

[0035] Protective door assembly 10, upper door frame 11, protective cover 12, human body sensor 13, fire sensor 14, sound and light alarm 15, camera 16, controller 17, switch electronic lock 18, switch door 19, observation window 110, door handle 111, moving rod 112, cleaning cloth 113, cleaning electric push rod 114, fixing plate 115, installation frame 116, control box 117, pressing electric push rod 118, pressing cover 119, movable buckle 120, pull rope 121, pull-out electric push rod 122, fire extinguisher 123, positioning clamp 124, bearing base 125, lower door frame 126, control switch 127. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example 1

[0038] like Figures 1 to 5 As shown, a protective door for a machine tool includes a protective door assembly 10 installed at a working observation port of the machine tool, the protective door assembly 10 includes an upper door frame 11 and a lower door frame 126 which are distributed up and down and connected to the machine tool, two groups of symmetrically distributed switch doors 19 are rotatably connected between the upper door frame 11 and the lower door frame 126, and the upper door frame 11 and the lower door frame 126 are both positioned and connected to the switch doors 19 through a built-in switch electronic lock 18;

[0039] The outer side of the upper door frame 11 is connected to a human body sensor 13 and a controller 17, the inner side of the upper door frame 11 is connected to a fire sensor 14 and a camera 16, and the top of the upper door frame 11 is connected to an audible and visual alarm 15; the outer side of the lower door frame 126 is connected to a control switch 127;

[0040] An observation window 110 is embedded and connected to the side of the switch door 19. A fixing plate 115 connected to the upper door frame 11 and the lower door frame 126 is provided on the inner side of the switch door 19. The fixing plate 115 is connected to a moving rod 112 arranged on one side of the observation window 110 through a cleaning electric push rod 114. A cleaning cloth 113 is connected to the corresponding side of the moving rod 112 and the observation window 110. A mounting frame 116 is connected to the side of the fixing plate 115 away from the switch door 19. A fire extinguisher 123 and a starting component for controlling the operation of the fire extinguisher 123 are connected inside the mounting frame 116.

[0041] The human body sensor 13, the fire sensor 14, the sound and light alarm 15, the camera 16, the controller 17, the switch electronic lock 18, the cleaning electric push rod 114, and the starting component are all connected to an external power supply through the control switch 127, and the human body sensor 13, the fire sensor 14, the sound and light alarm 15, the camera 16, the switch electronic lock 18, the cleaning electric push rod 114, and the starting component are all electrically connected to the controller 17, and the controller 17 is electrically connected to the control device of the machine tool.

[0042] How it works

[0043] Working principle of safety protection: The human body sensor 13 uses infrared sensing technology to continuously monitor whether there are people approaching around the protective door. When the infrared rays emitted by the human body are received by the human body sensor 13, the sensor converts the signal into an electrical signal and transmits it to the controller 17. The controller 17 performs analysis and processing according to the preset program. If it is determined that someone is approaching, it will send an unlocking command to the switch electronic lock 18. The switch electronic lock 18 releases the lock of the switch door 19 through the electromagnetic drive device to facilitate the operator to enter and exit. When the operator leaves and the human body sensor 13 cannot detect the human body signal, it sends a signal to the controller 17 again, and the controller 17 controls the switch 127 electronic lock 18 to re-lock the switch door 19. In addition, since the controller 17 is electrically connected to the control device of the machine tool, when the machine tool is working, the machine tool control device will send a working status signal to the controller 17. At this time, the controller 17 will control the switch 127 electronic lock 18 to remain locked, so that the staff cannot open the switch door 19, avoiding accidental touch by the staff when the machine tool is running, and ensuring the safety of operation.

[0044] Working principle of monitoring and fault warning: The camera 16 uses high-definition image acquisition technology to continuously shoot the internal situation of the machine tool and transmit the captured video signal to the controller 17 in real time. The controller 17 processes and stores the video signal, and the operator can view the internal working picture of the machine tool through the display screen connected to the controller 17. The fire sensor 14 uses smoke sensing and temperature sensing dual detection technology to monitor the internal environment of the machine tool in real time. Once it detects that the smoke concentration exceeds the set threshold or the temperature rises abnormally, the fire sensor 14 immediately sends a signal to the controller 17. After receiving the fire signal, the controller 17 quickly starts the sound and light alarm 15, and sends a strong sound and light signal to warn the surrounding personnel so that they can take timely countermeasures.

[0045] Working principle of cleaning the observation window 110: When the surface of the observation window 110 is stained and affects observation, the operator presses the control switch 127 to send a cleaning instruction to the controller 17. After receiving the instruction, the controller 17 controls the cleaning electric push rod 114 to start working. The cleaning electric push rod 114 converts electrical energy into mechanical energy through a screw drive or a gear drive, and pushes the moving rod 112 to make reciprocating linear motion along the surface of the observation window 110. During the movement of the moving rod 112, the cleaning cloth 113 connected to it is driven to wipe the observation window 110, remove the stains on the surface of the observation window 110, and maintain a good observation field of view. After the cleaning is completed, the operator operates the control switch 127 again to stop the cleaning electric push rod 114 from working.

[0046] Working principle of emergency treatment: When the fire sensor 14 detects a fire inside the machine tool, it immediately transmits the fire signal to the controller 17. After receiving the signal, the controller 17 immediately sends a command to the sound and light alarm 15 to make it sound an alarm and flash lights to attract the attention of people around; on the other hand, it sends a start signal to the start component of the fire extinguisher 123 in the installation frame 116. After receiving the signal, the start component opens the valve of the fire extinguisher 123 through an electromagnetic device or a mechanical trigger device, so that the fire extinguishing agent inside the fire extinguisher 123 is sprayed out to put out the fire, thereby effectively controlling the spread of the fire in the early stage of the fire and ensuring the safety of personnel and equipment.

[0047] Example 2

[0048] like Figures 1 to 5 As shown, a protective door for a machine tool includes a protective door assembly 10 installed at a working observation port of the machine tool, the protective door assembly 10 includes an upper door frame 11 and a lower door frame 126 which are distributed up and down and connected to the machine tool, two groups of symmetrically distributed switch doors 19 are rotatably connected between the upper door frame 11 and the lower door frame 126, and the upper door frame 11 and the lower door frame 126 are both positioned and connected to the switch doors 19 through a built-in switch electronic lock 18;

[0049] The outer side of the upper door frame 11 is connected to a human body sensor 13 and a controller 17, the inner side of the upper door frame 11 is connected to a fire sensor 14 and a camera 16, and the top of the upper door frame 11 is connected to an audible and visual alarm 15; the outer side of the lower door frame 126 is connected to a control switch 127;

[0050] An observation window 110 is embedded and connected to the side of the switch door 19. A fixing plate 115 connected to the upper door frame 11 and the lower door frame 126 is provided on the inner side of the switch door 19. The fixing plate 115 is connected to a moving rod 112 arranged on one side of the observation window 110 through a cleaning electric push rod 114. A cleaning cloth 113 is connected to the corresponding side of the moving rod 112 and the observation window 110. A mounting frame 116 is connected to the side of the fixing plate 115 away from the switch door 19. A fire extinguisher 123 and a starting component for controlling the operation of the fire extinguisher 123 are connected inside the mounting frame 116.

[0051] The human body sensor 13, the fire sensor 14, the sound and light alarm 15, the camera 16, the controller 17, the switch electronic lock 18, the cleaning electric push rod 114, and the starting component are all connected to an external power supply through the control switch 127, and the human body sensor 13, the fire sensor 14, the sound and light alarm 15, the camera 16, the switch electronic lock 18, the cleaning electric push rod 114, and the starting component are all electrically connected to the controller 17, and the controller 17 is electrically connected to the control device of the machine tool.

[0052] A protective cover 12 connected to the upper door frame 11 is provided on the outer side of the human body sensor 13 .

[0053] The advantages of the above settings are:

[0054] Protecting the human body sensor 13: The protective cover 12 can effectively block the cutting fluid, debris and other pollutants generated during the machine tool processing, avoid direct contact with the human body sensor 13, prevent the human body sensor 13 from malfunctioning due to the attachment or intrusion of pollutants, and ensure that it can always accurately sense human body signals and stably perform the safety protection function.

[0055] Improve sensing stability: In a complex machine tool working environment, external electromagnetic interference, strong light and other factors may affect the normal operation of the human body sensor 13. The protective cover 12 can shield some interference sources and provide a relatively stable working environment for the human body sensor 13, so that its sensing performance is not interfered by the outside world, thereby ensuring the reliability of the automatic opening and closing of the protective door.

[0056] Extending service life: Vibrations and collisions often occur when machine tools are working. With the buffering and protection of the protective cover 12, the damage to the human body sensor 13 caused by external impact can be reduced, and the risk of loosening and damage of its internal parts can be reduced, thereby extending the service life of the human body sensor 13 and reducing the cost of equipment maintenance and replacement.

[0057] The human body sensor 13 is an infrared sensor.

[0058] The advantages of the above settings are:

[0059] Contactless sensing

[0060] Infrared sensors work by sensing infrared rays emitted by the human body. They do not require direct contact with the human body, thus avoiding wear, failure and other problems that may be caused by contact. At the same time, they can accurately detect the approach or departure of people without interfering with the normal work of operators, providing reliable trigger signals for the automatic opening and closing of protective doors.

[0061] For machine tool environments where pollutants such as oil, dust, etc. may exist, non-contact sensing can effectively avoid the impact of pollutants on sensing elements and ensure the accuracy and stability of sensing.

[0062] Responsive

[0063] The infrared sensor is very sensitive to infrared rays emitted by the human body, and can quickly detect the presence and movement of the human body. It can react almost instantly when a person approaches the protective door, and transmit the signal to the controller 17 in time to realize the rapid opening or closing of the protective door, thereby improving the response speed of the protective door and helping to improve the overall safety protection performance.

[0064] The movements of personnel can be tracked in real time. When personnel have different behaviors near the protective door, such as approaching, leaving, staying, etc., corresponding sensing can be quickly made to provide timely and accurate information for the system.

[0065] Strong anti-interference ability

[0066] Infrared sensors generally work in a specific infrared band and have good anti-interference capabilities against other wavelengths of light and electromagnetic interference. In an environment where there are various electrical equipment and electromagnetic signals around the machine tool, they can work relatively stably and reduce the possibility of false triggering.

[0067] Compared with some other sensing technologies, such as ultrasonic sensing, which may be affected by factors such as environmental noise and airflow, infrared sensing is less affected by these factors and can maintain a good working condition in a more complex machine tool working environment.

[0068] Lower cost

[0069] Infrared sensor technology is relatively mature, the production process is relatively simple, and the market price is relatively affordable. While meeting the human body sensing function requirements of machine tool protective doors, it can effectively control costs, reduce the cost of the entire protective door system, improve the product's cost-effectiveness, and is conducive to the promotion and application of products.

[0070] Lower costs also mean that during subsequent maintenance and replacement, the costs required are relatively low, further reducing the cost of use.

[0071] Easy installation

[0072] Infrared sensors are usually small in size and relatively simple in structure. When installing, there is no need to make large-scale modifications to the machine tool and protective door. It only needs to be fixed in a suitable position, such as on the upper door frame 11, and the lines are connected. The installation process is relatively convenient and can save installation time and labor costs.

[0073] The installation position and angle can be flexibly adjusted according to actual usage requirements and on-site environment to achieve the best sensing effect and adapt to machine tool protective doors of different models and structures.

[0074] The fire sensor 14 is composed of a temperature and humidity sensor and a smoke sensor.

[0075] The advantages of the above settings are:

[0076] Improve detection accuracy

[0077] Multi-dimensional monitoring: The temperature and humidity sensor can monitor the changes in ambient temperature and humidity in real time, and the smoke sensor can detect the concentration of smoke particles in the air. Through two-dimensional monitoring, more comprehensive environmental information can be obtained to avoid misjudgment caused by a single factor. For example, when the ambient temperature suddenly rises and the humidity drops abnormally, and the smoke sensor detects an increase in smoke concentration, the combination of this information can more accurately determine whether a fire has occurred.

[0078] Mutual confirmation: The detection results of the temperature and humidity sensor and the smoke sensor can confirm each other. If only the smoke sensor alarms, it may be a false alarm due to dust or other reasons. However, if the temperature and humidity sensor also detects an abnormally high temperature, the possibility of a fire is greatly increased, thereby improving the accuracy of fire detection.

[0079] Strengthening early warning capabilities

[0080] Capturing early signals: At the beginning of a fire, smoke is usually produced first, and then the temperature gradually rises. Smoke sensors can issue an early warning when smoke just appears, while temperature and humidity sensors can detect abnormalities when the temperature begins to rise but has not yet formed an open flame. The combination of the two can issue an alarm at an earlier stage of the fire, buying more time for personnel evacuation and fire-fighting measures.

[0081] Monitor fire development trends: Temperature and humidity sensors continuously monitor the changing trends of temperature and humidity, which can help determine the speed and scale of fire development. If the temperature rises rapidly and the humidity drops sharply, it means that the fire may be spreading rapidly and more urgent response measures need to be taken.

[0082] Adapting to complex environments

[0083] Responding to environmental changes: Different environmental humidity and temperature conditions may affect the performance of the smoke sensor. The temperature and humidity sensor can monitor the changes in environmental temperature and humidity in real time, and provide reference and compensation for the detection results of the smoke sensor. For example, in a high humidity environment, smoke particles may be diluted by water vapor, causing the sensitivity of the smoke sensor to decrease. At this time, the temperature and humidity sensor can feed back the humidity information to the system and adjust the detection threshold of the smoke sensor to ensure that it can work properly.

[0084] Adaptable to various scenarios: Whether in a dry warehouse, a humid workshop or an outdoor place with large temperature changes, the combination of temperature and humidity sensor and smoke sensor can play a role. They can play their own advantages according to different environmental conditions and jointly complete the fire detection task, thus improving the applicability and reliability of the fire sensor 14 in various complex environments.

[0085] Provide more basis for decision making

[0086] Assisting firefighting decision-making: After receiving a fire alarm, firefighters can more accurately understand the situation at the fire scene through the information provided by temperature and humidity sensors and smoke sensors. Temperature and humidity data can help determine the intensity and spread direction of the fire, and smoke concentration information can determine the spread range of the smoke, thereby formulating a more scientific and reasonable fire extinguishing and rescue plan.

[0087] Optimize the control strategy of protective doors: For protective door systems, information from temperature and humidity sensors and smoke sensors can be used to optimize the control strategy of protective doors. For example, when a fire is detected but the smoke and temperature have not yet reached a dangerous level, the protective door can be set to a warning state to alert personnel; when the smoke and temperature continue to rise to a certain threshold, the protective door will be automatically closed to prevent the spread of fire and smoke.

[0088] The specific model of the controller 17 is a controller of the STM32 series.

[0089] The advantages of the above settings are:

[0090] Powerful processing capabilities

[0091] High-performance core: The STM32 series controller is based on the ARM Cortex-M core, which has excellent computing power and processing speed. It can quickly process data from multiple sensors such as human sensors 13, fire sensors 14, cameras 16, etc., and timely monitor and judge the various states of the protective door to ensure the real-time response and stable operation of the protective door system.

[0092] Multi-tasking: It can handle multiple tasks at the same time. For example, while monitoring the switch status of the protective door, it can also control the electric push rod 114 for cleaning the observation window 110, and control the sound and light alarm 15 and the fire extinguisher 123 starting components according to the signal of the fire sensor 14, etc., to achieve multi-functional integration and collaborative work of the protective door system.

[0093] Rich peripheral interfaces

[0094] Easy to connect sensors and actuators: With a variety of peripheral interfaces, such as GPIO, UART, SPI, I2C, etc., it can easily connect and communicate with various devices such as human body sensors 13, fire sensors 14, cameras 16, switch electronic locks 18, cleaning electric push rods 114, sound and light alarms 15, fire extinguisher 123 starting components, etc., and easily realize various functional expansions and upgrades of the protective door system.

[0095] Flexible communication mode: Different peripherals can choose different communication interfaces as needed, which improves the flexibility and scalability of system design. For example, the human body sensor 13 and the fire sensor 14 can be connected to the controller 17 through the I2C interface, the camera 16 can transmit image data through the SPI interface, and the switch electronic lock 18 can be controlled through the GPIO interface, making the hardware connection of the entire protective door system more concise and efficient.

[0096] High reliability

[0097] Industrial-grade standards: STM32 series controllers generally meet industrial-grade application standards, have high anti-interference ability and stability, can work reliably in harsh industrial environments such as machine tools, adapt to various complex working conditions such as high temperature, high humidity, strong electromagnetic interference, etc., reduce the possibility of system failures and misoperation, and ensure the safe operation of the protective door system.

[0098] Multiple safety mechanisms: It has multiple safety mechanisms, such as watchdog timer, power management function, etc. The watchdog timer can automatically reset when the system is abnormal to prevent the program from running away; the power management function can monitor and manage the system power supply to ensure that the system can still work normally under the condition of power supply voltage fluctuation, thus improving the reliability and stability of the system.

[0099] Low power design

[0100] Energy-saving advantage: It adopts advanced low-power design technology, which can effectively reduce power consumption, energy consumption and system operation costs while meeting system performance requirements. For equipment such as machine tool protective door systems that need to run for a long time, low-power design can extend the service life of the equipment and reduce maintenance costs.

[0101] Multiple low-power modes: Supports multiple low-power modes, such as sleep mode, standby mode, etc. When the protective door system is in idle state, it can enter low-power mode to reduce system power consumption; when an event is triggered, it can quickly wake up the system and resume normal operation, achieving a good balance between performance and power consumption.

[0102] Example 3

[0103] like Figures 1 to 5 As shown, a protective door for a machine tool includes a protective door assembly 10 installed at a working observation port of the machine tool, the protective door assembly 10 includes an upper door frame 11 and a lower door frame 126 which are distributed up and down and connected to the machine tool, two groups of symmetrically distributed switch doors 19 are rotatably connected between the upper door frame 11 and the lower door frame 126, and the upper door frame 11 and the lower door frame 126 are both positioned and connected to the switch doors 19 through a built-in switch electronic lock 18;

[0104] The outer side of the upper door frame 11 is connected to a human body sensor 13 and a controller 17, the inner side of the upper door frame 11 is connected to a fire sensor 14 and a camera 16, and the top of the upper door frame 11 is connected to an audible and visual alarm 15; the outer side of the lower door frame 126 is connected to a control switch 127;

[0105] An observation window 110 is embedded and connected to the side of the switch door 19. A fixing plate 115 connected to the upper door frame 11 and the lower door frame 126 is provided on the inner side of the switch door 19. The fixing plate 115 is connected to a moving rod 112 arranged on one side of the observation window 110 through a cleaning electric push rod 114. A cleaning cloth 113 is connected to the corresponding side of the moving rod 112 and the observation window 110. A mounting frame 116 is connected to the side of the fixing plate 115 away from the switch door 19. A fire extinguisher 123 and a starting component for controlling the operation of the fire extinguisher 123 are connected inside the mounting frame 116.

[0106] The human body sensor 13, the fire sensor 14, the sound and light alarm 15, the camera 16, the controller 17, the switch electronic lock 18, the cleaning electric push rod 114, and the starting component are all connected to an external power supply through the control switch 127, and the human body sensor 13, the fire sensor 14, the sound and light alarm 15, the camera 16, the switch electronic lock 18, the cleaning electric push rod 114, and the starting component are all electrically connected to the controller 17, and the controller 17 is electrically connected to the control device of the machine tool.

[0107] A door handle 111 is connected to the outer side of the opening and closing door 19 .

[0108] The advantages of the above settings are:

[0109] Closing the door: Compared with directly pushing or pulling the edge of the door, using the door handle 111 can save more effort and is more convenient to operate, especially for some heavier doors or doors that need to be opened and closed frequently, the role of the door handle 111 is more obvious.

[0110] Adapt to different groups of people: no matter adults or children, no matter people with greater or lesser strength, they can operate the door by holding the door handle 111. Its design conforms to ergonomics, can meet the use needs of different groups of people, and improves the ease of use and versatility of the door.

[0111] Security

[0112] Providing a stable gripping point: When opening or closing a door, the door handle 111 can provide a stable gripping point for the user to prevent the hand from slipping, thereby avoiding accidental collision or injury caused by loss of hand control. Especially in an emergency, people can grasp the door handle 111 more quickly and accurately to open the door and escape, which increases safety.

[0113] Assisting in balancing the body: For some people who are inconvenient to move or need to maintain balance with the help of external force, the door handle 111 can also assist in balancing the body. When opening and closing the door 19, they can support their body by holding the door handle 111 to reduce the risk of falling.

[0114] Protect the door and other parts

[0115] Disperse force: When the user opens or closes the door 19 through the door handle 111, the force will be evenly transmitted to the door body and related hardware components through the door handle 111, avoiding problems such as door deformation, damage or loosening of hardware caused by direct action on a part of the door, thereby extending the service life of the door and protecting the integrity of the door body and other related components.

[0116] Reduce wear and tear: If there is no door handle 111, people may directly grasp the edge or other parts of the door to open and close the door 19, which is easy to leave scratches or wear on the surface of the door, affecting the appearance and performance of the door. The door handle 111, as a special operating component, can withstand various frictions and collisions during the process of opening and closing the door 19, reducing damage to the surface of the door body.

[0117] The observation window 110 is made of tempered glass.

[0118] The advantages of the above settings are:

[0119] High security

[0120] Strong impact resistance: Tempered glass is obtained by special processing of ordinary glass. Its strength is several times higher than that of ordinary glass and can withstand greater impact. In daily use, even if it is accidentally hit by tools or objects, it is not easy to break, reducing the risk of injury caused by broken glass.

[0121] No sharp edges after breaking: When tempered glass is broken by an external force that exceeds its bearing capacity, it will split into many small particles without sharp edges. These small particles are not easy to cause serious harm to the human body. Compared with the sharp fragments formed after ordinary glass is broken, the safety during use is greatly improved.

[0122] Good strength and stability

[0123] Ability to withstand greater pressure: Tempered glass has higher strength and hardness and can withstand greater pressure and weight. When used as the observation window 110, it can remain stable and not easily deformed or broken even under different environmental conditions, such as high temperature, high pressure or a certain wind pressure, thus ensuring the integrity and functionality of the observation window 110.

[0124] Not easily affected by the environment: It has strong tolerance to environmental factors such as temperature changes and humidity changes, and is not prone to cracking, deformation, etc. due to thermal expansion and contraction. Whether in cold winter or hot summer, it can maintain good performance and a long service life.

[0125] High transparency

[0126] Clear observation: Tempered glass has good optical properties and high transparency, and can provide a clear field of view, so that people can clearly see the internal or external conditions through the observation window 110. This is very important for places where it is necessary to observe the operating status of equipment, working process or indoor and outdoor conditions in real time, such as factory workshops, laboratories, offices, etc.

[0127] No impact on lighting: While ensuring the observation function, it can also effectively transmit light without affecting the indoor lighting effect. It can allow natural light to enter the room better, reduce dependence on artificial lighting, reduce energy consumption, and at the same time create a bright and comfortable indoor environment.

[0128] Easy to clean and maintain

[0129] Smooth surface: The surface of tempered glass is smooth and flat, and it is not easy to absorb dust, stains, etc., so it is easier to clean. Just wipe it gently with a damp cloth or glass cleaner to restore it to a clean and tidy state, saving cleaning time and energy, and reducing maintenance costs.

[0130] Good corrosion resistance: It has good tolerance to most chemical substances and is not easily corroded by corrosive substances such as acids and alkalis. It can maintain good appearance and performance when used in some environments where it may be exposed to chemical substances, and there is no need to frequently replace the observation window 110.

[0131] A supporting base 125 is connected to the bottom of the installation frame 116 , and the fire extinguisher 123 is plugged into the supporting base 125 .

[0132] The advantages of the above settings are:

[0133] Stability and security

[0134] Maintain upright stability: The bearing base 125 provides a stable support platform for the fire extinguisher 123, so that it can maintain an upright state. After the fire extinguisher 123 is plugged into the bearing base 125, the center of gravity is stable and it is not easy to tip over, which reduces the risk of the fire extinguisher 123 falling to the ground and being damaged or even accidentally triggered due to accidental collision or shaking, and ensures the safe storage of the fire extinguisher 123 when not in use.

[0135] Prevent rolling: Compared with placing the fire extinguisher 123 randomly, plugging it into the supporting base 125 can effectively prevent the fire extinguisher 123 from rolling. In some environments where there may be vibration or frequent movement of people and objects, the rolling fire extinguisher 123 may collide with other objects, causing damage to the fire extinguisher 123 itself or surrounding objects, and may even cause safety accidents. The supporting base 125 can effectively avoid this situation.

[0136] Convenience and ease of use

[0137] Easy to use: The fire extinguisher 123 is mounted on the supporting base 125 so that it is in a fixed and easy-to-operate position. When an emergency such as a fire occurs, people can quickly locate and conveniently use the fire extinguisher 123 without having to search for it in a panic or take it out from a complicated position, which can save precious time for fire-fighting operations.

[0138] Easy installation and replacement: The fire extinguisher 123 is connected to the supporting base 125 by plugging, which is simple and direct, and is convenient for installing and replacing the fire extinguisher 123. When the fire extinguisher 123 needs to be regularly inspected, repaired or the agent is replaced, it can be easily unplugged from the supporting base 125 and plugged back in after the operation is completed, without using complicated tools or performing cumbersome installation steps.

[0139] Protection and maintenance

[0140] Avoid bottom wear: The bearing base 125 can protect the bottom of the fire extinguisher 123 from wear and corrosion on the ground or other contact surfaces. There may be various sharp objects or moisture on the ground, which can easily damage the bottom of the fire extinguisher 123, affecting its sealing and service life, and the bearing base 125 plays a role of isolation and protection.

[0141] Easy to clean and inspect: The fire extinguisher 123 is plugged into the supporting base 125 and has a certain distance from the ground, which is convenient for cleaning the bottom of the fire extinguisher 123 and the surrounding environment, and also convenient for inspectors to inspect the fire extinguisher 123 as a whole, including checking whether there is rust, deformation, etc. on the bottom, to ensure that the fire extinguisher 123 is always in good standby condition.

[0142] A positioning snap ring 124 is connected to the side of the installation frame 116 , and the positioning snap ring 124 is movably engaged with the fire extinguisher 123 .

[0143] The advantages of the above settings are:

[0144] Enhanced fixation effect

[0145] Multi-angle stability: The positioning clamp ring 124 clamps the fire extinguisher 123 from the side of the installation frame 116, and cooperates with the support of the bearing base 125 to form a multi-angle fixing system. It can effectively prevent the fire extinguisher 123 from shaking and shifting in the horizontal direction, so that the fire extinguisher 123 can be kept in the predetermined position under various circumstances. Compared with relying solely on the support of the bearing base 125, the stability is significantly improved.

[0146] Adapt to different environments: In some places where vibration and shaking may exist, such as factory workshops, transportation hubs, etc., the positioning clamp ring 124 can better adapt to complex environmental conditions. It can tightly clamp the fire extinguisher 123 to ensure that it will not loosen or fall due to external factors, ensuring the safe storage of the fire extinguisher 123 when not in use.

[0147] Easy operation and maintenance

[0148] Precise positioning: The movable snap-fit ​​method enables the fire extinguisher 123 to be precisely positioned during installation and removal. During installation, the operator can easily align the fire extinguisher 123 with the positioning snap ring 124 for snap-fit, ensuring that it is installed in place; when the fire extinguisher 123 is needed, it can also be quickly and accurately removed from the snap ring, thereby improving the emergency response speed.

[0149] Convenient for maintenance and inspection: The positioning clamp ring 124 does not affect the daily maintenance and inspection of the fire extinguisher 123. The inspector can easily check the appearance, pressure gauge and other components of the fire extinguisher 123, and perform regular maintenance and inspection on it. Moreover, when the fire extinguisher 123 needs to be replaced or repaired, it can be easily removed from the positioning clamp ring 124, and the operation is simple and quick.

[0150] Protect fire extinguisher

[0151] Prevent scratches and collisions: The part where the positioning clamp ring 124 contacts the fire extinguisher 123 can usually be made of soft and elastic materials, such as rubber, etc. In this way, when the fire extinguisher 123 is clamped, it can not only play a good fixing role, but also avoid scratches and damages to the surface of the fire extinguisher 123, thereby protecting the appearance integrity of the fire extinguisher 123 and extending its service life.

[0152] Buffering external force impact: When external force acts on the fire extinguisher 123, the positioning clamp ring 124 can play a certain buffering role. It can disperse and absorb part of the impact force, reduce the impact of the external force on the fire extinguisher 123 itself, reduce the risk of damage to the fire extinguisher 123 due to accidental impact, and ensure that it can maintain good performance under various circumstances.

[0153] like Figure 6 As shown, the starting assembly includes a control box 117 connected to the top of the mounting frame 116, and a downward pressing electric push rod 118 and a pulling electric push rod 122 are connected inside the control box 117. The movable end of the downward pressing electric push rod 118 is connected to a pressing cover 119, and the pressing cover 119 corresponds to the pressing switch of the fire extinguisher 123. The movable end of the pulling electric push rod 122 is connected to a movable buckle 120 through a pull rope 121, and the movable buckle 120 is connected to the starting pull ring of the fire extinguisher 123. The downward pressing electric push rod 118 and the pulling electric push rod 122 are both connected to an external power supply through a control switch 127, and the downward pressing electric push rod 118 and the pulling electric push rod 122 are both electrically connected to the controller 17.

[0154] The advantages of the above settings are:

[0155] Automation and convenience

[0156] Remote control start: Both the push-down electric push rod 118 and the pull-out electric push rod 122 are electrically connected to the controller 17, which means that remote control can be achieved through the controller 17. In some dangerous or difficult-to-approach fire scenes, the staff does not need to operate the fire extinguisher 123 at close range, but can send instructions through the controller 17 to start the fire extinguisher 123 from a safe distance, which greatly improves the convenience and safety of operation and reduces the risk of personnel being exposed to dangerous environments.

[0157] One-button operation: By connecting the external power supply through the control switch 127 and cooperating with the controller 17, the fire extinguisher 123 can be started by one-button. Compared with the traditional manual operation, there is no need for personnel to manually press the switch and pull the pull ring, which saves operation time, improves the response speed of fire extinguishing, can quickly put out the fire in the early stage, and effectively control the spread of the fire.

[0158] Accuracy and reliability

[0159] Precise triggering: The pressing cover 119 connected by pressing down the electric push rod 118 corresponds to the pressing switch of the fire extinguisher 123, and the electric push rod 122 is pulled out to connect the movable buckle 120 and the starting pull ring of the fire extinguisher 123 through the pull rope 121. This precise mechanical connection design can ensure that when starting, the pressing cover 119 accurately presses the pressing switch of the fire extinguisher 123, and the movable buckle 120 can also accurately pull the starting pull ring, avoiding possible deviations in manual operation and ensuring that the fire extinguisher 123 can be reliably started.

[0160] Stable power output: The electric push rod can provide stable power output. Compared with manual operation, the operating force and effect will not be affected by factors such as fatigue and tension of personnel. The push-down electric push rod 118 and the pull-out electric push rod 122 can work according to the preset force and stroke, ensuring that the push switch and the start pull ring of the fire extinguisher 123 can be correctly and effectively triggered, thereby improving the success rate of the fire extinguishing operation.

[0161] Versatility and adaptability

[0162] Combined starting method: The push-down electric push rod 118 and the pull-out electric push rod 122 are provided at the same time, forming a combined starting method. For fire extinguishers 123 of different types or different starting mechanisms, the pressing or pulling method can be flexibly selected to start, which increases the versatility and adaptability of the starting component and can meet the starting requirements of various fire extinguishers 123.

[0163] Scalability and compatibility: The method of setting the electric push rod in the control box 117 has good scalability. If the fire protection system needs to be upgraded or improved in the future, other functional modules can be easily added to the control box 117 or linked with other fire protection equipment, such as connecting with smoke alarms, temperature sensors and other equipment to realize automatic fire sensing and start the fire extinguisher 123, thereby improving the intelligence level of the entire fire protection system.

[0164] Security and maintainability

[0165] Reduce the risk of misoperation: The activation of the electric push rod is controlled by the controller 17 and the control switch 127. Compared with the directly exposed manual operation parts, the risk of misactivation of the fire extinguisher 123 due to human error or accidental collision is reduced. The fire extinguisher 123 will only be activated when the fire is confirmed and the command is sent through the regular operation process, which improves the safety and stability of the fire protection system.

[0166] Easy maintenance and inspection: The control box 117 integrates the push-down electric push rod 118, the pull-out electric push rod 122 and other components together, which is convenient for daily maintenance and inspection. The staff can easily inspect, repair and replace the various components in the control box 117, discover and solve potential problems in time, and ensure that the starting components are always in good working condition.

[0167] The examples given in the present invention are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here, and the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A protective door for a machine tool, characterized in that: The invention comprises a protective door assembly (10) installed at a working observation port of a machine tool, wherein the protective door assembly (10) comprises an upper door frame (11) and a lower door frame (126) which are distributed up and down and connected to the machine tool, wherein two groups of symmetrically distributed switch doors (19) are rotatably connected between the upper door frame (11) and the lower door frame (126), and the upper door frame (11) and the lower door frame (126) are both positioned and connected to the switch doors (19) via a built-in switch electronic lock (18); The outer side of the upper door frame (11) is connected to a human body sensor (13) and a controller (17); the inner side of the upper door frame (11) is connected to a fire sensor (14) and a camera (16); the top of the upper door frame (11) is connected to an audible and visual alarm (15); the outer side of the lower door frame (126) is connected to a control switch (127); An observation window (110) is embedded in the side of the switch door (19), and a fixing plate (115) connected to an upper door frame (11) and a lower door frame (126) is provided on the inner side of the switch door (19); the fixing plate (115) is connected to a moving rod (112) arranged on one side of the observation window (110) through a cleaning electric push rod (114); a cleaning cloth (113) is connected to the corresponding side of the moving rod (112) and the observation window (110); a mounting frame (116) is connected to the side of the fixing plate (115) away from the switch door (19), and a fire extinguisher (123) and a starting component for controlling the operation of the fire extinguisher (123) are connected inside the mounting frame (116); The human body sensor (13), the fire sensor (14), the sound and light alarm (15), the camera (16), the controller (17), the switch electronic lock (18), the cleaning electric push rod (114), and the starting component are all connected to an external power supply through a control switch (127); the human body sensor (13), the fire sensor (14), the sound and light alarm (15), the camera (16), the switch electronic lock (18), the cleaning electric push rod (114), and the starting component are all electrically connected to the controller (17); and the controller (17) is electrically connected to a control device of a machine tool.

2. A protective door for a machine tool according to claim 1, characterized in that: The outer side of the human body sensor (13) is provided with a protective cover (12) connected to the upper door frame (11).

3. A protective door for a machine tool according to claim 2, characterized in that: The human body sensor (13) is an infrared sensor.

4. The protective door for a machine tool according to claim 1, characterized in that: The fire sensor (14) is composed of a temperature and humidity sensor and a smoke sensor.

5. The protective door for a machine tool according to claim 1, characterized in that: The specific model of the controller (17) is a controller of the STM32 series.

6. The protective door for a machine tool according to claim 1, characterized in that: The outer side of the switch door (19) is connected with a door handle (111).

7. The protective door for a machine tool according to claim 1, characterized in that: The observation window (110) is made of tempered glass.

8. The protective door for a machine tool according to claim 1, characterized in that: The bottom of the installation frame (116) is connected to a bearing base (125), and the fire extinguisher (123) is plugged into the bearing base (125).

9. A protective door for a machine tool according to claim 8, characterized in that: A positioning snap ring (124) is connected to the side of the installation frame (116), and the positioning snap ring (124) is movably snap-connected to the fire extinguisher (123).

10. The protective door for a machine tool according to claim 1, characterized in that: The starting assembly comprises a control box (117) connected to the top of the mounting frame (116); a downward pressing electric push rod (118) and a pull-out electric push rod (122) are connected inside the control box (117); a movable end of the downward pressing electric push rod (118) is connected to a pressing cover (119); the pressing cover (119) corresponds to a pressing switch of a fire extinguisher (123); a movable end of the pull-out electric push rod (122) is connected to a movable buckle (120) via a pull rope (121); the movable buckle (120) is connected to a starting pull ring of the fire extinguisher (123); the downward pressing electric push rod (118) and the pull-out electric push rod (122) are both connected to an external power supply via a control switch (127); and the downward pressing electric push rod (118) and the pull-out electric push rod (122) are both electrically connected to a controller (17).

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