Alarm device for preventing non-staff from entering working face through infrared detection

Abstract

The utility model relates to the technical field of safety alarm equipment, in particular to an infrared detection alarm device for preventing non-staff from entering a working face, which comprises a safety channel, an infrared sensor, a PLC (programmable logic controller) control box and a control lock, the infrared sensor is fixedly mounted on the wall surface of the safety channel, and the PLC control box is fixedly mounted on the wall surface of the safety channel. The control lock is arranged in the PLC control box, an operating rod is arranged in the control lock and is in sliding connection with the control lock, a fixing block is fixedly installed on one side of the control lock, a limiting block is arranged above the fixing block, and the limiting block is rotationally connected with the fixing block; the limiting block is installed through the fixing block, the limiting block rotates along the fixing block to be opened, the operation rod can be unlocked, the control lock is operated through the operation rod, and when the limiting block rotates to the position above the fixing block, the operation rod can be limited and fixed, and the operation rod is prevented from being touched by mistake.

Description

Technical Field

[0001] This utility model relates to the field of safety alarm equipment technology, and in particular to an infrared detection alarm device to prevent unauthorized personnel from entering the work area. Background Technology

[0002] During production, due to the back-and-forth movement of the shuttle car, personnel are generally not allowed to enter the tunneling face at will. Alarm devices need to be installed at the entrance of the safety passage of the working face to remind non-workers who accidentally enter, so as to ensure production safety.

[0003] Current alarm devices require interlocking to shut them off during maintenance and repair. However, these interlocks often lack limit devices, which can lead to accidental activation of the interlock when personnel enter the work area, posing a safety hazard.

[0004] Therefore, when the current alarm devices are being maintained or repaired, they need to be shut down using interlocks. However, current interlocks usually lack limit devices, which can easily lead to accidental activation when personnel enter the work area, posing a safety hazard. An infrared detection alarm device to prevent unauthorized personnel from entering the work area can be designed. By using an interlock with a limit structure, the interlock can be limited and fixed when relevant personnel enter the work area for maintenance, preventing accidental activation and making it safer and more reliable. Utility Model Content

[0005] To address the issue that current alarm devices require interlocking to shut them down during maintenance, and that these interlocks often lack limit devices, leading to accidental activation of the interlocks when personnel enter the work area, posing a safety hazard.

[0006] The technical solution of this utility model is as follows: an infrared detection alarm device to prevent unauthorized personnel from entering the work area, comprising a safety passage, an infrared sensor, a PLC control box, a control interlock, and an alarm component. The infrared sensor is fixedly installed on the wall of the safety passage, and two sets of infrared sensors are provided, arranged symmetrically. The PLC control box is fixedly installed on the wall of the safety passage and is connected to the infrared sensor by wiring. The alarm component is located on the periphery of the PLC control box, and the control interlock is located inside the PLC control box. An operating lever is provided inside the control interlock, and the operating lever is slidably connected to the control interlock. A fixing block is fixedly installed on one side of the control interlock, and a limit block is provided above the fixing block, with the limit block rotatably connected to the fixing block.

[0007] Preferably, the overall device can be switched between maintenance and working modes by setting a control interlock. When the operating lever is inserted, it is in maintenance mode; when the operating lever is pulled out, it is in working mode. A fixed block is installed to install a limit block. By setting the limit block to rotate and open along the fixed block, the operating lever can be unlocked, allowing it to be freely inserted and pulled out. When the limit block rotates above the fixed block, the operating lever can be limited and fixed to prevent accidental activation of the operating lever, which would cause a change between maintenance and working modes, thus reducing safety hazards. In working mode, an infrared sensor is set to detect personnel and obstacles in the safety passage. When personnel or obstacles pass through, the infrared sensor transmits a signal to the PLC control box. The PLC control box can control the alarm component to issue an alarm and simultaneously control the working equipment in the safety passage to stop it in time to prevent safety accidents.

[0008] Preferably, a fixed fence is installed at the entrance of the safety passage, and a gate is provided on one side of the fixed fence, with the gate rotatably connected to the fixed fence.

[0009] Preferably, a warning sign is fixedly installed on one side of the fixed fence, and a door lock is fixedly installed between the fence gate and the safety passage.

[0010] Preferably, the alarm assembly includes a warning light and an alarm horn, with the warning light fixedly installed on one side of the PLC control box and the alarm horn fixedly installed on the other side of the PLC control box.

[0011] As a preferred option, a support bracket is fixedly installed on the wall of the safety passage. The support bracket is located on one side of the PLC control box, and a fire extinguisher is installed inside the support bracket.

[0012] Preferably, the PLC control box contains a processing device, and a control panel is also fixedly installed inside the PLC control box. The control panel is located above the processing device and is connected to the processing device via wiring.

[0013] Preferably, the control panel is equipped with a display screen, multiple control buttons, and multiple indicator lights.

[0014] The beneficial effects of this utility model are:

[0015] 1. The maintenance and working states of the entire device can be switched by controlling the interlock. When the operating lever is inserted, it is in maintenance mode; when the operating lever is pulled out, it is in working mode. The limit block is installed by the fixing block. The operating lever can be unlocked by the limit block rotating along the fixing block, allowing the operating lever to be freely inserted and pulled out. When the limit block rotates above the fixing block, the operating lever can be limited and fixed to prevent accidental contact of the operating lever from changing the maintenance and working modes, effectively reducing safety hazards.

[0016] 2. In working mode, the infrared sensor can detect one side of the fixed fence and gate in real time. When the infrared sensor detects personnel or obstacles passing through, it will send a signal to the PLC control box. When the processing equipment inside the PLC control box receives the signal, it will trigger the alarm horn to sound an alarm, and the warning light will stay on to tell personnel that unauthorized personnel are strictly prohibited from entering during production. At the same time, it will send a signal to stop the operation of equipment such as shuttle cars and crushers in the working area to prevent unauthorized personnel from continuing to enter and causing safety accidents. Attached Figure Description

[0017] Figure 1 The diagram shown is a first three-dimensional structural schematic of the infrared detection alarm device for preventing unauthorized personnel from entering the work area according to this utility model.

[0018] Figure 2 The diagram shown is a second three-dimensional structural schematic of the infrared detection alarm device for preventing unauthorized personnel from entering the work area according to this utility model.

[0019] Figure 3 The diagram shown is a three-dimensional structural diagram of the internal structure of the PLC control box of the infrared detection alarm device for preventing unauthorized personnel from entering the work area according to this utility model.

[0020] Figure 4 The diagram shown is a three-dimensional structural representation of the control and interlocking peripheral structure of the infrared detection alarm device for preventing unauthorized personnel from entering the work area according to this utility model.

[0021] Explanation of reference numerals in the attached diagram: 1. Safety passage; 101. Fixed fence; 102. Fence gate; 103. Warning sign; 104. Door lock; 2. Infrared sensor; 3. PLC control box; 301. Processing equipment; 302. Control panel; 303. Display screen; 304. Control button; 305. Signal indicator light; 401. Warning light; 402. Alarm horn; 501. Support bracket; 502. Fire extinguisher; 6. Control interlock; 601. Operating lever; 602. Fixing block; 603. Limit block. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Please see Figure 1 and Figure 4 This utility model provides an embodiment of an infrared detection alarm device to prevent unauthorized personnel from entering the work area. The device includes a safety passage 1, an infrared sensor 2, a PLC control box 3, a control interlock 6, and an alarm component. The infrared sensor 2 is fixedly installed on the wall of the safety passage 1. Two sets of infrared sensors 2 are symmetrically arranged. The PLC control box 3 is fixedly installed on the wall of the safety passage 1 and is connected to the infrared sensor 2 via wiring. The alarm component is located on the periphery of the PLC control box 3. The control interlock 6 is located inside the PLC control box 3. An operating lever 601 is installed inside the control interlock 6, and the operating lever 601 is slidably connected to the control interlock 6. A fixing block 602 is fixedly installed on one side of the control interlock 6, and a limit block 603 is provided above the fixing block 602, rotatably connected to the fixing block 602. By setting the control interlock 6, the maintenance state and working state of the entire device can be switched. When the operating lever 601 is inserted, it is in maintenance mode; when it is pulled out, it is in working mode. A limiting block 603 is installed via a fixing block 602. The limiting block 603 rotates along the fixing block 602 to unlock the operating lever 601, allowing it to be freely inserted and removed. When the limiting block 603 rotates above the fixing block 602, it limits and fixes the operating lever 601, preventing accidental activation that could change between maintenance and working modes, thus reducing safety hazards. In working mode, an infrared sensor 2 detects personnel and obstacles within the safety passage 1. When personnel or obstacles pass through, the infrared sensor 2 transmits a signal to the PLC control box 3. The PLC control box 3 can then control the alarm components to issue an alarm and simultaneously control the working equipment within the safety passage 1 to stop it promptly, preventing accidents. The infrared sensor 2 is model E3F-DS30C4.

[0024] Please see Figure 1 and Figure 2In this embodiment, a fixed fence 101 is fixedly installed at the entrance of the safety passage 1. A fence gate 102 is provided on one side of the fixed fence 101, and the fence gate 102 is rotatably connected to the fixed fence 101. By setting the fixed fence 101 and the fence gate 102 together, the working equipment inside the safety passage 1 can be enclosed and protected. A warning sign 103 is fixedly installed on one side of the fixed fence 101, and a door lock 104 is fixedly installed between the fence gate 102 and the safety passage 1. The door lock 104 can lock the fence gate 102 to prevent unauthorized personnel from entering, and the warning sign 103 can remind personnel entering the safety passage 1. The alarm component includes a warning light 401 and an alarm horn 402. Warning light 401 is fixedly installed on one side of PLC control box 3, and alarm horn 402 is fixedly installed on one side of PLC control box 3. By setting warning light 401, it can emit a constantly lit light to alert when infrared sensor 2 detects personnel or obstacles approaching. By setting alarm horn 402, it can simultaneously emit an alarm sound to alert relevant personnel. A support bracket 501 is fixedly installed on the wall of safety passage 1. The support bracket 501 is located on one side of PLC control box 3, and a fire extinguisher 502 is installed inside the support bracket 501. The support bracket 501 supports and places the fire extinguisher 502 in a conspicuous position. The fire extinguisher 502 can be used to deal with emergencies such as short circuits and fires.

[0025] Please see Figure 3 In this embodiment, a processing device 301 is fixedly installed inside the PLC control box 3, and a control panel 302 is also fixedly installed inside the PLC control box 3. The control panel 302 is located above the processing device 301 and is wiredly connected to the processing device 301. The processing device 301 processes the input or output signal data of the entire PLC control box 3, and the control panel 302 facilitates manual operation. A display screen 303 is fixedly installed on the control panel 302, and multiple sets of control buttons 304 and signal indicator lights 305 are provided on the surface of the control panel 302. The control buttons 304 facilitate operation of the control panel 302 by relevant personnel, the display screen 303 visualizes the data for easy observation by workers, and the signal indicator lights 305 facilitate confirmation of the overall working status of the device by workers.

[0026] When working, the fixed fence 101 and the fence gate 102 are used together to protect the working equipment inside the safety passage 1. The door lock 104 can lock the fence gate 102 to prevent non-workers from entering the working surface inside the safety passage 1. The warning sign 103 can remind personnel entering the safety passage 1.

[0027] In working mode, the infrared sensor 2 can detect one side of the fixed fence 101 and the gate 102 in real time. When the infrared sensor detects that personnel or obstacles are passing through, the infrared sensor 2 will input a signal to the PLC control box 3. When the processing equipment 301 inside the PLC control box 3 receives the signal, it will trigger the alarm horn 402 to sound an alarm. At the same time, the warning light 401 will stay on to tell personnel that non-workers are strictly prohibited from entering during production. It will also send a signal to the shuttle car and crusher and other equipment in the working area to stop running to prevent non-workers from continuing to enter and causing safety accidents.

[0028] When maintenance and repair of various equipment on the working surface inside safety passage 1 are required, open the PLC control box 3, rotate the limit block 603, insert the operating rod 601 into the control lock 6, and rotate the limit block 603 to restrict one end of the operating rod 601 inside the limit block 603 to prevent other personnel from accidentally touching it. Maintenance personnel can then open the door lock 104 and enter the working surface through the fence gate 102 to carry out maintenance work. After the maintenance work is completed, rotate the limit block 603 to unlock the operating rod 601, and then pull out the operating rod 601. Rotate the limit block 603 to limit the operating rod 601. The limit block 603, together with the fixing block 602, can prevent the operating rod 601 from being inserted.

[0029] Through the above steps, by rotating the limiting block 603, the operating rod 601 is inserted into the control lock 6. Rotating the limiting block 603 restricts one end of the operating rod 601 inside the limiting block 603, preventing accidental activation by other personnel. After maintenance is completed, rotating the limiting block 603 unlocks the operating rod 601, and then the operating rod 601 is pulled out. Rotating the limiting block 603 limits the operating rod 601. The limiting block 603, together with the fixing block 602, prevents the operating rod 601 from being inserted, effectively reducing safety hazards. This solves the problem that current alarm devices require the use of a lock to shut down the alarm device during maintenance and repair. Current locks usually lack limiting devices, which can easily lead to accidental activation of the lock after personnel enter the work area, posing a safety hazard.

[0030] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An infrared detection alarm device to prevent unauthorized personnel from entering the work area, including a safety passage (1), characterized in that: It also includes an infrared sensor (2), a PLC control box (3), a control interlock (6), and an alarm component. The infrared sensor (2) is fixedly installed on the wall of the safety passage (1). There are two sets of infrared sensors (2), which are arranged symmetrically. The PLC control box (3) is fixedly installed on the wall of the safety passage (1). The PLC control box (3) is connected to the infrared sensor (2) by wiring. The alarm component is located on the periphery of the PLC control box (3). The control interlock (6) is located inside the PLC control box (3). An operating lever (601) is installed inside the control interlock (6). The operating lever (601) is slidably connected to the control interlock (6). A fixing block (602) is fixedly installed on one side of the control interlock (6). A limit block (603) is set above the fixing block (602). The limit block (603) is rotatably connected to the fixing block (602).

2. The infrared detection alarm device for preventing unauthorized personnel from entering the work area according to claim 1, characterized in that: A fixed fence (101) is fixedly installed at the entrance of the safety passage (1), and a fence gate (102) is provided on one side of the fixed fence (101). The fence gate (102) is rotatably connected to the fixed fence (101).

3. The infrared detection alarm device for preventing unauthorized personnel from entering the work area according to claim 1, characterized in that: A warning sign (103) is fixedly installed on one side of the fixed fence (101), and a door lock (104) is fixedly installed between the fence gate (102) and the safety passage (1).

4. The infrared detection alarm device for preventing unauthorized personnel from entering the work area according to claim 1, characterized in that: The alarm assembly includes a warning light (401) and an alarm horn (402). The warning light (401) is fixedly installed on one side of the PLC control box (3), and the alarm horn (402) is fixedly installed on one side of the PLC control box (3).

5. The infrared detection alarm device for preventing unauthorized personnel from entering the work area according to claim 1, characterized in that: A support bracket (501) is fixedly installed on the wall of the safety passage (1). The support bracket (501) is located on one side of the PLC control box (3). A fire extinguisher (502) is installed inside the support bracket (501).

6. The infrared detection alarm device for preventing unauthorized personnel from entering the work area according to claim 1, characterized in that: The PLC control box (3) has a processing device (301) fixedly installed inside. The PLC control box (3) also has a control panel (302) fixedly installed inside. The control panel (302) is located above the processing device (301) and is connected to the processing device (301) by wiring.

7. The infrared detection alarm device for preventing unauthorized personnel from entering the work area according to claim 6, characterized in that: The control panel (302) is fixedly equipped with a display screen (303), and the surface of the control panel (302) is provided with multiple sets of control buttons (304) and multiple sets of signal indicator lights (305).

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