Intrinsic safety type pyroelectric infrared personnel induction alarm device and method for coal mine

Abstract

The invention relates to the technical field of mining infrared alarm, and discloses an intrinsic safety type pyroelectric infrared personnel induction alarm device and method for a coal mine, and the device comprises a fixed frame, the front side surface of the fixed frame is fixedly connected with a supporting rod, the front end of the supporting rod is fixedly connected with a mounting plate, and the inner surface of the fixed frame is fixedly connected with a connecting plate. According to the invention, the pyroelectric infrared sensor is inserted into the clamping seat, so that the pyroelectric infrared sensor is quickly mounted on the mounting plate, the use convenience is improved, the trapezoidal positioning block I is inserted into the clamping groove to lock the trapezoidal clamping rod and the clamping plate, and the pyroelectric infrared sensor can be quickly mounted on the mounting plate. And the sliding block drives the trapezoidal positioning block I to be pulled out of the clamping groove, so that the trapezoidal positioning block I is not limited, at the moment, the pyroelectric infrared sensor can be quickly dismounted from the clamping seat, and the use convenience is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of infrared alarms for mines, and in particular to an intrinsically safe pyroelectric infrared personnel sensing alarm device and method for coal mines. Background Art

[0002] The pyroelectric infrared personnel sensing alarm device is an alarm device composed of an infrared sensor and an alarm. The pyroelectric infrared personnel sensing alarm device detects infrared rays of a specific wavelength of about 10 microns emitted by the human body through a pyroelectric infrared sensor to release an alarm signal. The pyroelectric infrared personnel sensing alarm device for mining is mainly used in coal mines and other mining environments, especially in the operation area of ​​belt conveyors. When a person is detected approaching, a voice alarm and a red flashing light are emitted through the sound and light alarm device to improve the safety level and safety factor during mine operation. However, infrared sensors are easily damaged when they are operated for a long time in dangerous working scenes such as mines. In the prior art, it is difficult to quickly install and disassemble infrared sensors, and it is not convenient to carry out maintenance, resulting in a low service life of infrared sensors.

[0003] The patent with announcement number CN210530925U discloses a mine personnel approach alarm device, which has a mine infrared sensor, a mine controller, and a mine sound and light alarm. The control input end of the mine infrared sensor is connected to the control sensor output end of the mine controller, the power input end of the mine controller is connected to the power input end of the mine sound and light alarm, and the control alarm output end of the mine controller is connected to the control input end of the mine sound and light alarm. The proximity alarm device is installed on the equipment for underground operations, the power input end of the mine controller is connected to the power supply, and the control electrical equipment output end of the mine controller is connected to the power input end of the operating equipment. During operation, when the mine infrared sensor scans and finds someone entering a dangerous area, it converts the infrared radiation energy into electrical energy, and after signal processing, converts the signal into a trigger pulse signal and inputs it into the mine controller. The mine controller cuts off the power supply of the operating equipment to achieve the effect of immediate shutdown, and controls the mine sound and light alarm to sound and display an alarm. Although this patent solves the above problems, it is still difficult to quickly install and disassemble the infrared sensor, making it difficult to maintain and repair the infrared sensor, and the service life of the infrared sensor is short. Therefore, an intrinsically safe pyroelectric infrared personnel sensing alarm device and method for coal mines are proposed to solve the above problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an intrinsically safe pyroelectric infrared personnel sensing alarm device and method for coal mines in view of the deficiencies in the above-mentioned prior art.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: an intrinsically safe pyroelectric infrared personnel sensing alarm device for coal mines, comprising a fixed frame, the front side surface of the fixed frame is fixedly connected to a support rod, the front end of the support rod is fixedly connected to a mounting plate, the inner surface of the fixed frame is fixedly connected to a connecting plate, the front side of the mounting plate is provided with a pyroelectric infrared sensor, the circumferential surface of the pyroelectric infrared sensor is fixedly connected to a clamping plate, the inner surface of the mounting plate is slidably connected to a clamping seat, the rear side surface of the clamping seat is fixedly connected to an elastic telescopic rod, the front side surface of the mounting plate is fixedly connected to a trapezoidal clamping rod, and the A card slot is provided on the inner side, a slide slot frame is fixedly connected to the front side of the card plate, a through slot is provided on the front side of the slide slot frame, an elastic telescopic rod 2 is fixedly connected to the inner surface of the slide slot frame, one end of the elastic telescopic rod 2 close to the trapezoidal card rod is fixedly connected to a trapezoidal positioning block 1, a sliding block is fixedly connected to the front side of the trapezoidal positioning block 1, a first push plate is fixedly connected to the circumferential surface of the card seat, a sensor protection device for protecting the pyroelectric infrared sensor is provided on the front side of the fixed frame, an alarm protection device for protecting the sound and light alarm is provided on the front side of the fixed frame, and the elastic telescopic rod 1 is fixedly connected to the inner surface of the slide slot frame. The rear end is fixedly connected to the front side of the connecting plate, the trapezoidal positioning block 1 is slidably connected to the inner surface of the slide slot frame, the sliding block is slidably connected to the inner surface of the through slot, the trapezoidal positioning block 1 and the inner surface of the card slot are in contact with each other, the trapezoidal clamping rod slides from the rear side of the card plate to penetrate the front side of the card plate, the circumferential surface of the pyrolytic infrared sensor and the inner surface of the card seat are in contact with each other, the fixed frame is fixed to the bracket on the wall of the mine cave, when the pyrolytic infrared sensor is needed, the pyrolytic infrared sensor is inserted into the card seat, the pyrolytic infrared sensor is continuously pushed backward, the pyrolytic infrared sensor drives the card plate to move backward, so that the trapezoidal clamping rod is inserted into the card plate, when the ladder After the inclined surface of the trapezoidal clamping rod contacts the inclined surface of the trapezoidal positioning block 1, the trapezoidal clamping rod pushes the trapezoidal positioning block 1 to slide and shrink in the slide slot frame and squeeze the elastic telescopic rod 2 through the guidance of the inclined surface, and the card plate drives the slide slot frame and the trapezoidal positioning block 1 to continue to move backward. When the trapezoidal positioning block 1 is aligned with the slot opened on the trapezoidal clamping rod, the elastic reset effect of the elastic telescopic rod 2 drives the trapezoidal positioning block 1 to pop out of the slide slot frame and insert into the slot, thereby locking the trapezoidal clamping rod and the card plate. When the pyroelectric infrared sensor needs to be removed, the sliding block is pushed to the side away from the trapezoidal clamping rod, and the sliding block drives the trapezoidal positioning block 1 to be pulled out of the slot, so that the trapezoidal positioning block 1 loses its limit.

[0006] Preferably, the sensor protection device includes a rotating plate, a movable protective plate, a side baffle, and a shield plate, the rotating plate is hinged on the rear side of the mounting plate, the movable protective plate is fixedly connected to the front end of the rotating plate, the side baffle plates are hinged on both sides of the movable protective plate, and the shield plate is hinged on the front side of the movable protective plate. The sensor protection device also includes a connecting plate, a third elastic telescopic rod, a second trapezoidal positioning block, an insert block, a second push plate, a first inclined plate, and a connecting rod. The connecting plate is fixedly connected to the front side of the mounting plate, the third elastic telescopic rod is fixedly connected to the side of the connecting plate away from the card seat, the second trapezoidal positioning block is fixedly connected to the side of the elastic telescopic rod three away from the connecting plate, and the insert block is fixedly connected to the trapezoidal positioning block two away from the elastic On one side of the telescopic rod three, the second push plate is fixedly connected to both sides of the card plate, the first inclined plate is fixedly connected to the rear side of the second push plate, the connecting rod is fixedly connected to the rear side of the card seat, and the upper and lower sides of the mounting plate are provided with card grooves, and the inner surface of the card groove and the outer surface of the rotating plate are in contact with each other, the rear side surface of the trapezoidal positioning block two and the front side surface of the mounting plate are in contact with each other, the plug block slides from the side of the side baffle close to the trapezoidal positioning block two to penetrate the side of the side baffle away from the trapezoidal positioning block two, the inclined surface of the second push plate and the inclined surface of the trapezoidal positioning block two are in contact with each other, the top end of the first push plate and the lower surface of the rotating plate are in contact with each other, and a torsion spring is arranged at the hinge of the rotating plate and the mounting plate to release the thermal infrared sensor The device is inserted into the card seat and pushed backward, so that the card seat slides backward, and the card seat drives the first push plate to move backward, and the first push plate drives the rotating plate and the movable protective plate to rotate along the hinge with the mounting plate, thereby blocking the upper and lower sides of the pyroelectric infrared sensor, and the left and right sides and the front side of the pyroelectric infrared sensor can be blocked by rotating the side baffles and the shielding plate. When the pyroelectric infrared sensor moves backward, it drives the card plate to move backward, and the card plate drives the second push plate to move backward, and the second push plate drives the first inclined plate to move backward. When the first inclined plate moves backward, its inclined surface contacts the inclined surface of the trapezoidal positioning block 2, and the first inclined plate pushes the trapezoidal positioning block 2 close to the side baffle through the guidance of the inclined surface and finally fits with the side baffle, and the trapezoidal positioning block After the second is fitted with the side baffle, it drives the plug block to be inserted into the side baffle to fix the side baffle. When the pyro infrared sensor needs to be maintained and inspected, the trapezoidal positioning block one is pulled out of the slot. At this time, the elastic force of the elastic telescopic rod one pushes the holder to move forward, and the holder pushes the pyro infrared sensor and the card plate to move forward. The card plate then drives the second push plate and the first inclined plate to move forward, so that the first inclined plate is separated from the trapezoidal positioning block two. At this time, the elastic reset effect of the elastic telescopic rod three pulls the trapezoidal positioning block two toward the connecting plate, and the trapezoidal positioning block two drives the plug block to be pulled out of the side baffle. At the same time, the holder drives the first push plate to move forward, and then the elasticity of the torsion spring causes the rotating plate and the movable protective plate to rotate and reset and move away from the pyro infrared sensor.

[0007] Preferably, the alarm protection device includes a guide rod, a sliding seat, a movable plate, and an audible and visual alarm. The guide rod is fixedly connected to the inner surface of the fixed frame, the sliding seat is slidably connected to the circumferential surface of the guide rod, the movable plate is fixedly connected to the front side of the sliding seat, and the audible and visual alarm is fixedly connected to the side of the movable plate away from the elastic telescopic rod one. The alarm protection device also includes a fixed protective plate, an elastic telescopic rod four, a second inclined plate, a limiting guide rail, and a trapezoidal transmission plate. The fixed protective plate is fixedly connected to the front side of the fixed frame, and the elastic telescopic rod four is fixedly connected to the connecting plate On both sides, the second inclined plate is fixedly connected to the front side of the moving plate, the limiting guide rail is fixedly connected to the side of the second inclined plate close to the connecting rod, the trapezoidal transmission plate is fixedly connected to the rear end of the connecting rod, the guide rod is fixedly connected to both sides of the connecting plate, the end of the elastic telescopic rod four away from the connecting plate is fixedly connected to the sliding seat, the trapezoidal transmission plate is slidably connected to the inner surface of the limiting guide rail, the inclined surface of the trapezoidal transmission plate and the inclined surface of the second inclined plate are in contact with each other, the upper and lower sides of the moving plate are in contact with the fixed protective plate, when the pyroelectric infrared sensor senses the infrared signal emitted by the human body After the change, a signal is sent to the sound and light alarm, and the sound and light alarm sounds an alarm after receiving the signal. When the pyroinfrared sensor is not installed, the sliding seat is in contact with the connecting plate. At this time, the sound and light alarm is blocked by the fixed protective plate. When working, the moving plate is pulled away from the elastic telescopic rod 1, and the moving plate drives the sliding seat to slide on the guide rod away from the connecting plate, so that the sound and light alarm extends out of the fixed protective plate and pushes the card seat backward. The card seat drives the connecting rod to move backward, and the connecting rod drives the trapezoidal transmission plate to slide in the limit guide rail and move backward, and the trapezoidal transmission plate pushes the second inclined plate through the guide of the inclined surface. Move away from the elastic telescopic rod one, and the second inclined plate drives the movable plate away from the elastic telescopic rod one, so that the sound and light alarm can automatically extend out of the fixed protective plate during the installation of the pyroelectric infrared sensor. After removing the pyroelectric infrared sensor, the elastic telescopic rod one drives the connecting rod and the trapezoidal transmission plate to move forward through the clamping seat, so that the second inclined plate loses the resistance of the trapezoidal transmission plate. At this time, the elastic reset effect of the elastic telescopic rod four pulls the sliding seat to slide on the guide rod and approach the connecting plate, the sliding seat drives the movable plate to approach the elastic telescopic rod one, and the movable plate drives the sound and light alarm to retract into the fixed protective plate.

[0008] A method for using an intrinsically safe pyroelectric infrared personnel sensing alarm device for coal mines comprises the following steps: Step 1: First, fix the fixing frame on the bracket of the mine wall. When the pyroelectric infrared sensor needs to be used, insert the pyroelectric infrared sensor into the card holder; Step 2: Then, the pyroelectric infrared sensor is continuously pushed backward, and the pyroelectric infrared sensor drives the card plate to move backward, so that the trapezoidal card rod is inserted into the card plate, and the trapezoidal card rod pushes the trapezoidal positioning block 1 to slide into the slide slot frame through the guide of the inclined surface, and contracts and squeezes the elastic telescopic rod 2; Step 3: Then, the card plate drives the slide slot frame and the trapezoidal positioning block 1 to continuously move backwards. When the trapezoidal positioning block 1 is aligned with the slot provided on the trapezoidal clamping rod, the elastic resetting action of the elastic telescopic rod 2 drives the trapezoidal positioning block 1 to pop out of the slide slot frame and insert into the slot to lock the trapezoidal clamping rod and the card plate. Step 4: Finally, after the pyroelectric infrared sensor is installed, when the miners are working in the mine, the pyroelectric infrared sensor can respond to the infrared signals emitted by the human body and transmit the signals to the sound and light alarm. The sound and light alarm will sound an alarm after receiving the signals.

[0009] The present invention adopts the above technical solution to bring the following beneficial effects: 1. The intrinsically safe pyroelectric infrared personnel sensing alarm device for coal mines inserts the pyroelectric infrared sensor into the holder, so that the pyroelectric infrared sensor can be quickly installed on the mounting plate, which improves the convenience of use. Once the trapezoidal positioning block is inserted into the slot, the trapezoidal clamping rod and the clamping plate are locked, so that the pyroelectric infrared sensor can be more stably installed on the holder. The sliding block drives the trapezoidal positioning block to be pulled out of the slot, so that the trapezoidal positioning block loses its limit. At this time, the pyroelectric infrared sensor can be quickly removed from the holder, which further improves the convenience of use.

[0010] 2. The coal mine uses an intrinsically safe pyroelectric infrared personnel sensing alarm device. The movable protective plate blocks the upper and lower sides of the pyroelectric infrared sensor to prevent some sand and gravel in the mine from falling and hitting the pyroelectric infrared sensor, which improves the safety of the use of the pyroelectric infrared sensor. The rotating side baffles and shields can block the left and right sides and the front side of the pyroelectric infrared sensor to improve the protection effect. The plug-in block is inserted into the side baffle to fix the side baffle, which improves the stability of the protection and prevents the sensor protection device from loosening after being hit by sand and gravel. The movable protective plate rotates to reset and stays away from the pyroelectric infrared sensor, making it convenient for staff to check.

[0011] 3. The coal mine uses an intrinsically safe pyroelectric infrared personnel sensing alarm device. The sound and light alarm is blocked by a fixed protective plate to prevent the sound and light alarm from being damaged by sand and gravel. The movable plate drives the sliding seat to slide on the guide rod away from the connecting plate, so that the sound and light alarm extends out of the fixed protective plate, making the sound and light alarm easier to notice. When the pyroelectric infrared sensor is installed, the sound and light alarm can automatically extend out of the fixed protective plate, which improves the convenience of use. The movable plate then drives the sound and light alarm to retract into the fixed protective plate, further improving the convenience of use of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional overall structure of the present invention; Figure 2 It is a schematic diagram of the front side cross-sectional three-dimensional structure of the present invention; Figure 3 It is a schematic diagram of the front side cross-sectional three-dimensional structure of the card holder of the present invention; Figure 4 It is a schematic diagram of the front side cross-sectional three-dimensional structure of the slide frame of the present invention; Figure 5 For the present invention Figure 4 A is a schematic diagram of the enlarged structure of the middle part; Figure 6 It is a schematic diagram of the front side cross-sectional three-dimensional structure of the sensor protection device of the present invention; Figure 7 For the present invention Figure 6 A schematic diagram of the enlarged structure of B; Figure 8 It is a schematic diagram of the front side cross-sectional three-dimensional structure of the alarm protection device of the present invention.

[0013] In the figure: 1, fixed frame; 2, support rod; 3, mounting plate; 4, connecting plate; 5, pyro-infrared sensor; 51, card plate; 52, card seat; 53, elastic telescopic rod 1; 54, trapezoidal card rod; 55, card slot; 56, slide slot frame; 57, through slot; 58, elastic telescopic rod 2; 59, trapezoidal positioning block 1; 510, sliding block; 511, first push plate; 6, sensor protection device; 61, rotating plate; 62, movable protection plate; 63 , side baffle; 64, shield; 65, connecting plate; 66, elastic telescopic rod three; 67, trapezoidal positioning block two; 68, plug block; 69, second push plate; 610, first inclined plate; 611, connecting rod; 7, alarm protection device; 71, guide rod; 72, sliding seat; 73, moving plate; 74, sound and light alarm; 75, fixed protection plate; 76, elastic telescopic rod four; 77, second inclined plate; 78, limit guide rail; 79, trapezoidal transmission plate. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0015] See also Figure 1-Figure 8An embodiment of the present invention is: a coal mine intrinsically safe pyroelectric infrared personnel sensing alarm device, comprising a fixed frame 1, a support rod 2 is fixedly connected to the front side of the fixed frame 1, a mounting plate 3 is fixedly connected to the front end of the support rod 2, a connecting plate 4 is fixedly connected to the inner surface of the fixed frame 1, a pyroelectric infrared sensor 5 is arranged on the front side of the mounting plate 3, a clamping plate 51 is fixedly connected to the circumferential surface of the pyroelectric infrared sensor 5, a clamping seat 52 is slidably connected to the inner surface of the mounting plate 3, an elastic telescopic rod 53 is fixedly connected to the rear side of the clamping seat 52, and the front side of the mounting plate 3 is fixedly connected to the mounting plate 3. A trapezoidal clamping rod 54 is fixedly connected, a clamping groove 55 is provided on the inner side of the trapezoidal clamping rod 54, a slide groove frame 56 is fixedly connected to the front side of the clamping plate 51, a through groove 57 is provided on the front side of the slide groove frame 56, an elastic telescopic rod 2 58 is fixedly connected to the inner surface of the slide groove frame 56, an end of the elastic telescopic rod 2 58 close to the trapezoidal clamping rod 54 is fixedly connected to a trapezoidal positioning block 1 59, a front side of the trapezoidal positioning block 1 59 is fixedly connected to a sliding block 510, a first push plate 511 is fixedly connected to the circumferential surface of the clamping seat 52, and the pyroelectric infrared sensor 5 is inserted into the clamping seat 52, thereby The pyroelectric infrared sensor 5 is quickly installed on the mounting plate 3, which improves the convenience of use. The trapezoidal positioning block 59 is inserted into the card slot 55 to lock the trapezoidal card rod 54 and the card plate 51, so that the pyroelectric infrared sensor 5 is more stably installed on the card seat 52. The front side of the fixed frame 1 is provided with a sensor protection device 6 for protecting the pyroelectric infrared sensor 5. The front side of the fixed frame 1 is provided with an alarm protection device 7 for protecting the sound and light alarm 74. The rear end of the elastic telescopic rod 53 is fixedly connected to the front side of the connecting plate 4. The trapezoidal positioning block 59 is inserted into the card slot 55 to lock the trapezoidal card rod 54 and the card plate 51, so that the pyroelectric infrared sensor 5 is more stably installed on the card seat 52. 59 is slidably connected to the inner surface of the slide slot frame 56, the sliding block 510 is slidably connected to the inner surface of the through slot 57, the trapezoidal positioning block 59 and the inner surface of the card slot 55 are in contact with each other, the trapezoidal card rod 54 slides from the rear side of the card plate 51 to pass through the front side of the card plate 51, the circumferential surface of the pyroelectric infrared sensor 5 and the inner surface of the card seat 52 are in contact with each other, the sliding block 510 drives the trapezoidal positioning block 59 to be pulled out of the card slot 55, so that the trapezoidal positioning block 59 loses its limit. At this time, the pyroelectric infrared sensor 5 can be quickly removed from the card seat 52, further improving the convenience of use.

[0016] Working principle: fix the fixing frame 1 on the bracket of the mine wall. When the pyroelectric infrared sensor 5 is needed, insert the pyroelectric infrared sensor 5 into the holder 52, so as to quickly install the pyroelectric infrared sensor 5 on the mounting plate 3, which improves the convenience of use. Push the pyroelectric infrared sensor 5 backward continuously, and the pyroelectric infrared sensor 5 drives the card plate 51 to move backward, so that the trapezoidal card rod 54 is inserted into the card plate 51. When the inclined surface of the trapezoidal card rod 54 contacts the inclined surface of the trapezoidal positioning block 1 59, the trapezoidal card rod 54 pushes the trapezoidal positioning block 1 59 to slide and contract into the slide groove frame 56 through the guidance of the inclined surface and squeezes the elastic telescopic rod 2 58. The card plate 51 drives the slide groove frame 56 and the trapezoidal positioning block 1 59 Continue to move backward. When the trapezoidal positioning block 59 is aligned with the slot 55 provided on the trapezoidal clamping rod 54, the elastic reset action of the elastic telescopic rod 2 58 drives the trapezoidal positioning block 59 to pop out of the slide slot frame 56 and insert into the slot 55, thereby locking the trapezoidal clamping rod 54 and the clamping plate 51, so that the pyroelectric infrared sensor 5 is more stably installed on the clamping seat 52. When the pyroelectric infrared sensor 5 needs to be removed, the sliding block 510 is pushed to the side away from the trapezoidal clamping rod 54. The sliding block 510 drives the trapezoidal positioning block 59 to be pulled out of the slot 55, so that the trapezoidal positioning block 59 loses its limit. At this time, the pyroelectric infrared sensor 5 can be quickly removed from the clamping seat 52, further improving the convenience of use.

[0017] See also Figure 1-Figure 8On the basis of the above embodiment, in another embodiment of the present invention, the sensor protection device 6 includes a rotating plate 61, a movable protective plate 62, a side baffle 63, and a shield 64. The rotating plate 61 is hinged at the rear side of the mounting plate 3, the movable protective plate 62 is fixedly connected to the front end of the rotating plate 61, the side baffle 63 is hinged at both sides of the movable protective plate 62, and the shield 64 is hinged at the front side of the movable protective plate 62. The movable protective plate 62 blocks the upper and lower sides of the pyroelectric infrared sensor 5 to prevent some sand and gravel in the mine from falling and hitting the pyroelectric infrared sensor 5, thereby improving the pyroelectric infrared sensor 5. The sensor 5 is safe to use. The rotating side baffle 63 and the shield 64 can block the left and right sides and the front side of the pyro-infrared sensor 5, thereby improving the protection effect. The sensor protection device 6 also includes a connecting plate 65, an elastic telescopic rod three 66, a trapezoidal positioning block two 67, an insert block 68, a second push plate 69, a first inclined plate 610, and a connecting rod 611. The connecting plate 65 is fixedly connected to the front side of the mounting plate 3, the elastic telescopic rod three 66 is fixedly connected to the side of the connecting plate 65 away from the card seat 52, and the trapezoidal positioning block two 67 is fixedly connected to the elastic telescopic rod three 66 away from the connecting plate On one side of the plate 65, the plug block 68 is fixedly connected to the side of the trapezoidal positioning block 2 67 away from the elastic telescopic rod 3 66, the second push plate 69 is fixedly connected to both sides of the card plate 51, the first inclined plate 610 is fixedly connected to the rear side of the second push plate 69, the connecting rod 611 is fixedly connected to the rear side of the card seat 52, and the upper and lower sides of the mounting plate 3 are provided with a card slot 55, and the inner surface of the card slot 55 and the outer surface of the rotating plate 61 are in contact with each other, the rear side of the trapezoidal positioning block 2 67 and the front side of the mounting plate 3 are in contact with each other, and the plug block 68 is close to the trapezoidal positioning block 2 67 from the side baffle 63 One side slides through the side baffle plate 63 away from the side of the trapezoidal positioning block 67, the inclined surface of the second push plate 69 and the inclined surface of the trapezoidal positioning block 67 contact each other, the top of the first push plate 511 and the lower surface of the rotating plate 61 contact each other, and a torsion spring is provided at the hinge between the rotating plate 61 and the mounting plate 3. The insert block 68 is inserted into the side baffle plate 63 to fix the side baffle plate 63, thereby improving the stability of the protection and preventing the sensor protection device 6 from loosening after being hit by sand and gravel. The movable protective plate 62 rotates to reset and moves away from the pyroelectric infrared sensor 5, thereby facilitating inspection by the staff.

[0018] Working principle: insert the pyroelectric infrared sensor 5 into the holder 52 and push it backward, so that the holder 52 slides backward, the holder 52 drives the first push plate 511 to move backward, and the first push plate 511 pushes the rotating plate 61 and the movable protective plate 62 to rotate 90 degrees along the hinge with the mounting plate 3, thereby blocking the upper and lower sides of the pyroelectric infrared sensor 5 to prevent some sand and gravel in the mine from falling and hitting the pyroelectric infrared sensor 5, thereby improving the safety of the pyroelectric infrared sensor 5, and by rotating the side baffle 63 and the shield 6 The left and right sides and the front side of the pyro-infrared sensor 5 can be blocked, thereby improving the protective effect. When the pyro-infrared sensor 5 moves backward, it drives the card plate 51 to move backward, and the card plate 51 drives the second push plate 69 to move backward. The second push plate 69 drives the first inclined plate 610 to move backward. When the first inclined plate 610 moves backward, its inclined surface contacts the inclined surface of the second trapezoidal positioning block 67. The first inclined plate 610 pushes the second trapezoidal positioning block 67 close to the side baffle 63 through the guidance of the inclined surface and finally fits with the side baffle 63. After the trapezoidal positioning block 2 67 is fitted with the side baffle 63, the inserting block 68 is driven to be inserted into the side baffle 63, so that the side baffle 63 is fixed, thereby improving the stability of the protection and preventing the sensor protection device 6 from being loosened after being hit by sand and stones. When it is necessary to perform maintenance and inspection on the pyroelectric infrared sensor 5, the trapezoidal positioning block 1 59 is pulled out of the card slot 55. At this time, the elastic force of the elastic telescopic rod 1 53 pushes the card seat 52 to move forward, and the card seat 52 pushes the pyroelectric infrared sensor 5 and the card plate 51 to move forward, and the card plate 51 then drives the second The push plate 69 and the first inclined plate 610 move forward, so that the first inclined plate 610 is separated from the trapezoidal positioning block 2 67. At this time, the elastic reset action of the elastic telescopic rod 3 66 pulls the trapezoidal positioning block 2 67 closer to the connecting plate 65, and the trapezoidal positioning block 2 67 drives the plug block 68 to withdraw from the side baffle 63. At the same time, the base 52 drives the first push plate 511 to move forward, and then the elasticity of the torsion spring causes the rotating plate 61 and the movable protective plate 62 to rotate and reset and move away from the pyroelectric infrared sensor 5, thereby facilitating inspection by the staff.

[0019] See also Figure 1-Figure 8On the basis of the above embodiment, in another embodiment of the present invention, the alarm protection device 7 includes a guide rod 71, a sliding seat 72, a moving plate 73, and an acoustic and light alarm 74. The guide rod 71 is fixedly connected to the inner surface of the fixed frame 1, the sliding seat 72 is slidably connected to the circumferential surface of the guide rod 71, the moving plate 73 is fixedly connected to the front side of the sliding seat 72, and the acoustic and light alarm 74 is fixedly connected to the side of the moving plate 73 away from the elastic telescopic rod 53. The acoustic and light alarm 74 is blocked by the fixed protective plate 75 to prevent the acoustic and light alarm 74 from being damaged by sand and gravel impact. The moving plate 73 drives the sliding seat 72 to slide on the guide rod 71 away from the connecting plate 4, so that the acoustic and light alarm 74 extends out of the fixed protective plate 75, making the acoustic and light alarm 74 easier to be noticed. The alarm protection device 7 also includes a fixed protective plate 75, an elastic telescopic rod 4 76, a second inclined plate 77, a limiting guide rail 78, a trapezoidal transmission plate 79, a fixed protective plate The second slanted plate 77 is fixedly connected to the front side of the movable plate 73, and the limiting guide rail 78 is fixedly connected to the side of the second slanted plate 77 close to the connecting rod 611. The trapezoidal transmission plate 79 is fixedly connected to the rear end of the connecting rod 611. The guide rod 71 is fixedly connected to both sides of the connecting plate 4. The end of the elastic telescopic rod 46 76 away from the connecting plate 4 is fixedly connected to the sliding seat 72. The trapezoidal transmission plate 79 is slidably connected to the inner surface of the limiting guide rail 78. The inclined surface of the trapezoidal transmission plate 79 and the inclined surface of the second slanted plate 77 are in contact with each other. The upper and lower sides of the movable plate 73 are in contact with the fixed protective plate 75. When the pyroelectric infrared sensor 5 is installed, the sound and light alarm 74 can automatically extend out of the fixed protective plate 75, which improves the convenience of use. The movable plate 73 then drives the sound and light alarm 74 to retract into the fixed protective plate 75, which further improves the convenience of use of the device.

[0020] Working principle: when the pyroinfrared sensor 5 senses the change of the infrared signal emitted by the human body, it sends a signal to the sound and light alarm 74, and the sound and light alarm 74 alarms after receiving the signal. When the pyroinfrared sensor 5 is not installed, the sliding seat 72 is in contact with the connecting plate 4. At this time, the sound and light alarm 74 is blocked by the fixed protective plate 75 to prevent the sound and light alarm 74 from being damaged by sand and gravel. When working, the moving plate 73 is pulled away from the elastic telescopic rod 53, and the moving plate 73 drives the sliding seat 72 to slide on the guide rod 71 away from the connecting plate 4, so that the sound and light alarm 74 extends out of the fixed protective plate 75, making the sound and light alarm 74 easier to be noticed, and the card seat 52 is pushed backward, and the card seat 52 drives the connecting rod 611 to move backward, and the connecting rod 611 drives the trapezoidal transmission plate 79 to slide in the limiting guide rail 78 and move backward, and the trapezoidal transmission The plate 79 pushes the second inclined plate 77 away from the elastic telescopic rod 53 through the guidance of the inclined surface, and the second inclined plate 77 then drives the moving plate 73 away from the elastic telescopic rod 53, so that during the installation of the pyroelectric infrared sensor 5, the sound and light alarm 74 can automatically extend out of the fixed protective plate 75, thereby improving the convenience of use. After the pyroelectric infrared sensor 5 is removed, the elastic telescopic rod 53 drives the connecting rod 611 and the trapezoidal transmission plate 79 to move forward through the clamping seat 52, so that the second inclined plate 77 loses the resistance of the trapezoidal transmission plate 79. At this time, the elastic reset effect of the elastic telescopic rod four 76 pulls the sliding seat 72 to slide on the guide rod 71 and approach the connecting plate 4, and the sliding seat 72 drives the moving plate 73 to approach the elastic telescopic rod 53, and the moving plate 73 then drives the sound and light alarm 74 to retract into the fixed protective plate 75, thereby further improving the convenience of use of the device.

[0021] The present invention provides an intrinsically safe pyro-infrared personnel sensing alarm device and method for coal mines. There are many methods and ways to implement the technical solution. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. An intrinsically safe pyro-infrared personnel sensing alarm device for coal mines, comprising a fixing frame (1), characterized in that: The front side surface of the fixing frame (1) is fixedly connected to a support rod (2), the front end of the support rod (2) is fixedly connected to a mounting plate (3), the inner surface of the fixing frame (1) is fixedly connected to a connecting plate (4), a pyroelectric infrared sensor (5) is arranged on the front side of the mounting plate (3), a clamping plate (51) is fixedly connected to the circumferential surface of the pyroelectric infrared sensor (5), a clamping seat (52) is slidably connected to the inner surface of the mounting plate (3), an elastic telescopic rod (53) is fixedly connected to the rear side surface of the clamping seat (52), and a trapezoidal clamping rod (54) is fixedly connected to the front side surface of the mounting plate (3). ), a card slot (55) is provided on the inner side of the trapezoidal clamping rod (54), a slide slot frame (56) is fixedly connected to the front side of the clamping plate (51), a through slot (57) is provided on the front side of the slide slot frame (56), an elastic telescopic rod 2 (58) is fixedly connected to the inner surface of the slide slot frame (56), an end of the elastic telescopic rod 2 (58) close to the trapezoidal clamping rod (54) is fixedly connected to a trapezoidal positioning block 1 (59), a sliding block (510) is fixedly connected to the front side of the trapezoidal positioning block 1 (59), and a first push plate (511) is fixedly connected to the circumferential surface of the clamping seat (52); A sensor protection device (6) for protecting the pyroelectric infrared sensor (5) is arranged on the front side of the fixing frame (1), and an alarm protection device (7) for protecting the sound and light alarm (74) is arranged on the front side of the fixing frame (1).

2. The intrinsically safe pyro-infrared personnel sensing alarm device for coal mines according to claim 1, characterized in that: The rear end of the elastic telescopic rod (53) is fixedly connected to the front side of the connecting plate (4), the trapezoidal positioning block (59) is slidably connected to the inner surface of the slide groove frame (56), the sliding block (510) is slidably connected to the inner surface of the through groove (57), the trapezoidal positioning block (59) and the inner surface of the card slot (55) are in contact with each other, the trapezoidal card rod (54) slides from the rear side of the card plate (51) to the front side of the card plate (51), and the circumferential surface of the pyroelectric infrared sensor (5) and the inner surface of the card seat (52) are in contact with each other.

3. The intrinsically safe pyro-infrared personnel sensing alarm device for coal mines according to claim 2 is characterized in that: The sensor protection device (6) comprises a rotating plate (61), a movable protective plate (62), a side baffle (63), and a shielding plate (64); the rotating plate (61) is hinged to the rear side of the mounting plate (3); the movable protective plate (62) is fixedly connected to the front end of the rotating plate (61); the side baffle (63) is hinged to both sides of the movable protective plate (62); and the shielding plate (64) is hinged to the front side of the movable protective plate (62).

4. The intrinsically safe pyro-infrared personnel sensing alarm device for coal mines according to claim 3 is characterized in that: The sensor protection device (6) also includes a connecting plate (65), a third elastic telescopic rod (66), a second trapezoidal positioning block (67), an insert block (68), a second push plate (69), a first inclined plate (610), and a connecting rod (611), wherein the connecting plate (65) is fixedly connected to the front side of the mounting plate (3), the third elastic telescopic rod (66) is fixedly connected to a side of the connecting plate (65) away from the clamping seat (52), the second trapezoidal positioning block (67) is fixedly connected to a side of the third elastic telescopic rod (66) away from the connecting plate (65), the insert block (68) is fixedly connected to a side of the second trapezoidal positioning block (67) away from the third elastic telescopic rod (66), the second push plate (69) is fixedly connected to both sides of the clamping plate (51), the first inclined plate (610) is fixedly connected to the rear side of the second push plate (69), and the connecting rod (611) is fixedly connected to the rear side of the clamping seat (52).

5. The intrinsically safe pyro-infrared personnel sensing alarm device for coal mines according to claim 4, characterized in that: The mounting plate (3) is provided with a card slot (55) on both upper and lower sides, and the inner surface of the card slot (55) and the outer surface of the rotating plate (61) are in contact with each other, the rear side surface of the trapezoidal positioning block (67) and the front side surface of the mounting plate (3) are in contact with each other, the insert block (68) slides from the side of the side baffle (63) close to the trapezoidal positioning block (67) and passes through the side of the side baffle (63) away from the trapezoidal positioning block (67), the inclined surface of the second push plate (69) and the inclined surface of the trapezoidal positioning block (67) are in contact with each other, the top end of the first push plate (511) and the lower surface of the rotating plate (61) are in contact with each other, and a torsion spring is provided at the hinge between the rotating plate (61) and the mounting plate (3).

6. The intrinsically safe pyro-infrared personnel sensing alarm device for coal mines according to claim 5, characterized in that: The alarm protection device (7) comprises a guide rod (71), a sliding seat (72), a movable plate (73), and an audible and visual alarm (74); the guide rod (71) is fixedly connected to the inner surface of the fixed frame (1); the sliding seat (72) is slidably connected to the circumferential surface of the guide rod (71); the movable plate (73) is fixedly connected to the front side of the sliding seat (72); and the audible and visual alarm (74) is fixedly connected to a side of the movable plate (73) away from the elastic telescopic rod (53).

7. The intrinsically safe pyro-infrared personnel sensing alarm device for coal mines according to claim 6, characterized in that: The alarm protection device (7) also includes a fixed protection plate (75), four elastic telescopic rods (76), a second inclined plate (77), a limiting guide rail (78), and a trapezoidal transmission plate (79), wherein the fixed protection plate (75) is fixedly connected to the front side of the fixed frame (1), the four elastic telescopic rods (76) are fixedly connected to both sides of the connecting plate (4), the second inclined plate (77) is fixedly connected to the front side of the movable plate (73), the limiting guide rail (78) is fixedly connected to one side of the second inclined plate (77) close to the connecting rod (611), and the trapezoidal transmission plate (79) is fixedly connected to the rear end of the connecting rod (611).

8. The intrinsically safe pyro-infrared personnel sensing alarm device for coal mines according to claim 7, characterized in that: The guide rod (71) is fixedly connected to both sides of the connecting plate (4); one end of the fourth elastic telescopic rod (76) away from the connecting plate (4) is fixedly connected to the sliding seat (72); the trapezoidal transmission plate (79) is slidably connected to the inner surface of the limiting guide rail (78); the inclined surface of the trapezoidal transmission plate (79) and the inclined surface of the second inclined plate (77) are in contact with each other; and the upper and lower sides of the movable plate (73) are in contact with the fixed protective plate (75).

9. A method for using an intrinsically safe pyroelectric infrared personnel sensing alarm device for coal mines, using the intrinsically safe pyroelectric infrared personnel sensing alarm device for coal mines as claimed in claim 8, characterized in that: The following steps are involved: Step 1: First, fix the fixing frame (1) on the bracket of the mine wall, and when the pyroelectric infrared sensor (5) needs to be used, insert the pyroelectric infrared sensor (5) into the holder (52); Step 2: Then, the pyroelectric infrared sensor (5) is continuously pushed backwards, and the pyroelectric infrared sensor (5) drives the card plate (51) to move backwards, so that the trapezoidal card rod (54) is inserted into the card plate (51), and the trapezoidal card rod (54) is guided by the inclined surface to push the trapezoidal positioning block 1 (59) to slide and contract into the slide groove frame (56) and squeeze the elastic telescopic rod 2 (58); Step 3: Subsequently, the card plate (51) drives the slide groove frame (56) and the trapezoidal positioning block 1 (59) to continuously move backwards. When the trapezoidal positioning block 1 (59) is aligned with the slot (55) provided on the trapezoidal clamping rod (54), the elastic resetting action of the elastic telescopic rod 2 (58) drives the trapezoidal positioning block 1 (59) to pop out of the slide groove frame (56) and insert into the slot (55) to lock the trapezoidal clamping rod (54) and the card plate (51); Step 4: Finally, after the pyroelectric infrared sensor (5) is installed, when the miners are working in the mine, the pyroelectric infrared sensor (5) can respond to the infrared signal emitted by the human body and transmit the signal to the sound and light alarm (74). The sound and light alarm (74) will sound an alarm after receiving the signal.

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