Infrared temperature sensor self-checking mechanism

Abstract

The invention relates to the field of temperature sensors, in particular to an infrared temperature sensor self-checking mechanism. The device comprises a housing, an infrared temperature sensor, a self-checking assembly, a communication module and a central controller. The infrared temperature sensor is arranged on the shell, and the detection end of the infrared temperature sensor is located on the outer side of the shell. The self-checking assembly comprises a sleeve arranged on the shell, a heating cylinder arranged on the sleeve in a sliding mode, a heating assembly arranged on the inner side of the heating cylinder, and a driving assembly which is arranged in the shell and drives the heating cylinder to move upwards to block the outer side of the detection end of the infrared temperature sensor or move downwards from the outer side of the detection end. When the heating cylinder moves upwards to block the outer side of the detection end of the infrared temperature sensor, heat generated by the heating assembly is used for conducting self-inspection on the infrared temperature sensor, and when the heating cylinder moves downwards from the outer side of the detection end, self-inspection on the infrared temperature sensor is relieved. Whether the infrared temperature sensor is in a normal operation state can be remotely detected, manpower is saved, and the detection efficiency is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of temperature sensors, in particular to an infrared temperature sensor self-checking mechanism. BACKGROUND

[0002] In the coal industry, coal ore is generally transported by a V-shaped belt conveyor, the upper part of the conveying belt is in the shape of a V that is distributed upward, and the coal is located on the inner side, which is not easy to scatter from both sides in the width direction during the conveying process, and the conveying effect is good. When the belt conveyor is running, the roller is driven to rotate by the power device, and then the conveying belt is driven to run by the roller. If the conveying belt and the roller slip due to the heavy weight of the coal or other factors, the temperature between the roller and the conveying belt will rise due to friction. Currently, an infrared temperature sensor can be used to detect the temperature of the roller to assist in determining whether the slipping condition occurs.

[0003] However, whether the infrared temperature sensor itself is in a normal operating state is currently generally detected by manual on-site detection. The length of the existing belt conveyor used in coal mines is generally long, which can be several kilometers long, the distance is far, and time is consumed, resulting in low overall detection efficiency. SUMMARY

[0004] The present application aims to solve the problems in the background art and provides an infrared temperature sensor self-checking mechanism that can remotely detect whether the infrared temperature sensor is in a normal operating state, saving labor and improving detection efficiency.

[0005] The technical scheme of the present application is an infrared temperature sensor self-checking mechanism, which comprises a shell, an infrared temperature sensor, a self-checking assembly, a communication module, and a central controller. The infrared temperature sensor is arranged on the shell, and the detection end of the infrared temperature sensor is located outside the shell. The self-checking assembly comprises a sleeve arranged on the shell, a heating cylinder slidingly arranged on the sleeve, a heating assembly arranged inside the heating cylinder, and a driving assembly arranged inside the shell and driving the heating cylinder to move upwards to block the detection end of the infrared temperature sensor or to move downwards away from the detection end. When the heating cylinder moves upwards to block the detection end of the infrared temperature sensor, the infrared temperature sensor is self-checked by using the heat generated by the heating assembly. When the heating cylinder moves downwards away from the detection end, the self-checking of the infrared temperature sensor is released. The communication module is in communication connection with the infrared temperature sensor, the heating assembly, and the driving assembly, respectively. The central controller is in remote communication connection with the communication module.

[0006] Preferably, the heating assembly comprises a mounting plate arranged in the heating cylinder and an electric heating wire arranged on the mounting plate.

[0007] Preferably, the drive assembly includes a bracket disposed within the housing, a motor disposed on the bracket, a cam disposed at the output end of the motor, a mounting shaft disposed within the housing, a lever disposed on the mounting shaft for rotation, and a lifting assembly disposed at one end of the lever, with the cam pressed against the other end of the lever.

[0008] Preferably, the bracket is equipped with a limit switch, and the cam is equipped with two push rods. When one push rod triggers the limit switch, the lifting component moves up to the maximum limit height, and when the other push rod triggers the limit switch, the lifting component moves down to the minimum limit height.

[0009] Preferably, the lifting assembly includes a lifting frame, a limiting frame disposed within the housing, a spring tensioned between the lifting frame and the limiting frame, a slide rod vertically disposed on the lifting frame, a bottom ring disposed at the bottom end of the heating cylinder, and a positioning cylinder disposed at the bottom of the bottom ring. The slide rod is slidably disposed through the bottom ring. The lifting frame has a strip-shaped hole, and a pin is installed at the end of the lever, with the pin sliding within the strip-shaped hole.

[0010] Preferably, the outer circumferential surface of the positioning cylinder has vertically distributed guide strips, and the positioning cylinder is vertically slidably mounted on the limiting frame through the guide strips.

[0011] Preferably, the bottom end of the positioning cylinder extends inward, the inner diameter of the bottom ring is smaller than the inner diameter of the top end of the positioning cylinder, and the top end of the positioning cylinder protrudes outward in the radial direction.

[0012] Preferably, a magnet is provided on the slide rod, the magnet is located inside the positioning cylinder, a magnet is provided at the bottom of the bottom ring that is magnetically repelled by the magnet, a baffle is provided on the outer circumference of the heating cylinder below the sleeve, the lower part of the heating cylinder has a through hole one, and the top part has a through hole two facing the horizontal direction.

[0013] Compared with existing technologies, the present invention has the following beneficial technical effects: The present invention can remotely detect whether the infrared temperature sensor is in normal operating condition, saving manpower, and the remote self-test is convenient and efficient. After the infrared temperature sensor completes its self-test, the testing personnel can quickly move the heating cylinder downwards and use the infrared temperature sensor to re-detect the temperature of the belt conveyor rollers, shortening the interruption time of normal temperature monitoring. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is a partial cross-sectional view of the structure before the infrared temperature sensor has undergone self-testing. Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle; Figure 4 This is a partial structural cross-sectional view of the infrared temperature sensor during self-testing. Figure 5For Figure 4 Enlarged view of the structure at B.

[0015] Reference signs: 1, shell; 2, support; 3, motor; 4, cam; 5, push rod; 6, travel switch; 7, lever; 71, mounting shaft; 8, pin shaft; 9, lifting frame; 91, strip-shaped hole; 10, limiting frame; 11, sleeve; 12, spring; 13, sliding rod; 14, magnet I; 15, positioning cylinder; 16, bottom ring; 17, magnet II; 18, heating cylinder; 181, through hole I; 182, through hole II; 19, blocking table; 20, mounting plate; 21, electric heating wire; 22, infrared temperature sensor. DETAILED DESCRIPTION

[0016] As Figures 1-5 shown, the infrared temperature sensor self-checking mechanism provided by the embodiment includes a shell 1, an infrared temperature sensor 22, a self-checking assembly, a communication module, and a central controller.

[0017] The infrared temperature sensor 22 is arranged on the shell 1, and a detection end of the infrared temperature sensor 22 is located outside the shell 1 and faces the roller of the belt conveyor, so as to detect the temperature of the roller of the belt conveyor. The shell 1 has an eave that blocks the detection end of the infrared temperature sensor 22, thereby protecting the infrared temperature sensor 22.

[0018] The self-checking assembly includes a sleeve 11 arranged on the shell 1, a heating cylinder 18 slidingly arranged on the sleeve 11, a heating assembly arranged inside the heating cylinder 18, and a driving assembly arranged in the shell 1 and driving the heating cylinder 18 to move upwards to block the outside of the detection end of the infrared temperature sensor 22 or to move downwards away from the outside of the detection end. When the heating cylinder 18 moves upwards to block the outside of the detection end of the infrared temperature sensor 22, the infrared temperature sensor 22 is self-checked by using the heat generated by the heating assembly, and when the heating cylinder 18 moves downwards away from the outside of the detection end, the self-checking of the infrared temperature sensor 22 is released. The top end of the sleeve 11 is lower than the height of the detection end of the infrared temperature sensor 22 and does not cause obstruction.

[0019] As Figure 3 shown, the heating assembly includes a mounting plate 20 arranged in the heating cylinder 18 and an electric heating wire 21 arranged on the mounting plate 20. The electric heating wire 21 is used to generate heat, and the generated heat can finally be used for state detection of the infrared temperature sensor 22. A thermocouple can also be integrated in the heating cylinder 18 to detect the internal temperature, and the detection data of the thermocouple is transmitted to the central controller, so that the detection personnel can remotely judge whether the electric heating wire 21 is normally heated.

[0020] As Figure 2 and Figure 4As shown, the driving assembly comprises a bracket 2 arranged in the shell 1, a motor 3 arranged on the bracket 2, a cam 4 arranged at the output end of the motor 3, a mounting shaft 71 arranged in the shell 1, a lever 7 rotatably arranged on the mounting shaft 71, and a lifting assembly arranged at one end of the lever 7. The cam 4 is pressed at the other end of the lever 7. The central controller can remotely control the motor 3 through the communication module, drive the cam 4 to rotate by the motor 3, and when the cam 4 presses the one end of the lever 7, the other end of the lever 7 is raised, and after the cam 4 continues to rotate, the other end of the lever 7 will be lowered. In the state of one rotation of the cam 4, the other end of the lever 7 can be from low to high and then to low, completing a cycle. Then the lifting assembly can be moved up or down, and the heating cylinder 18 is moved up or down by the lifting assembly.

[0021] The bracket 2 is provided with a travel switch 6 in communication connection with the communication module, and the cam 4 is provided with two push rods 5. When one push rod 5 touches the travel switch 6, the lifting assembly moves up to the limit highest height, as shown in Figure 4 When the other push rod 5 touches the travel switch 6, the lifting assembly moves down to the limit lowest height, as shown in Figure 2 The tester knows which push rod 5 touches the travel switch 6 in the initial state and the state of the lever 7 at that time, and then drives the cam 4 to rotate by the motor 3. When the travel switch 6 is touched by the push rod 5 later, the state of the lever 7 can be determined according to the number of touches (even or odd).

[0022] As shown in Figures 2-5 The lifting assembly comprises a lifting frame 9, a limiting frame 10 arranged in the shell 1, a spring 12 arranged between the lifting frame 9 and the limiting frame 10, a slide rod 13 arranged vertically on the lifting frame 9, a bottom ring 16 arranged at the bottom end of the heating cylinder 18, and a positioning cylinder 15 arranged at the bottom of the bottom ring 16. The slide rod 13 is slidably arranged through the bottom ring 16. The lifting frame 9 has a strip-shaped hole 91, and the lever 7 is provided with a pin shaft 8 at the end, and the pin shaft 8 slides in the strip-shaped hole 91. When the end of the lever 7 away from the cam 4 rotates, the pin shaft 8 rotates, and the pin shaft 8 slides in the strip-shaped hole 91, thereby driving the lifting frame 9 to rise and fall. When the lifting frame 9 rises, the spring 12 is compressed and the slide rod 13 is lifted. When the lifting frame 9 falls, the spring 12 is elongated, and the lever 7 is pressed at the end by the lifting frame 9 and the pin shaft 8.

[0023] In order to make the positioning cylinder 15 vertically slide, the outer circumferential surface of the positioning cylinder 15 has vertically distributed guide strips, and the positioning cylinder 15 is vertically slidably arranged on the limiting frame 10 through the guide strips. At the same time, the bottom end of the positioning cylinder 15 extends inward, and the inner diameter of the bottom ring 16 is smaller than the inner diameter of the top end of the positioning cylinder 15. The top end of the positioning cylinder 15 protrudes radially outward, so that the positioning cylinder 15 will not fall downward from the limiting frame 10.

[0024] In order to realize the lifting of the heating cylinder 18 by the lifting of the slide rod 13, the slide rod 13 is provided with a magnet 14 which is located inside the positioning cylinder 15, and the bottom ring 16 is provided with a magnet 17 which is magnetically repulsive to the magnet 14. The positioning cylinder 15, the bottom ring 16 and the heating cylinder 18 are all made of light materials, and the repulsive force between the magnet 14 and the magnet 17 is large enough to meet the use requirements. When the slide rod 13 moves upwards, the magnet 14 pushes the magnet 17 upwards by magnetism, and the magnet 17 drives the bottom ring 16 and the heating cylinder 18 to move upwards. The outer circumferential surface of the heating cylinder 18 is provided with a stop table 19 which is located below the sleeve 11, and the heating cylinder 18 is provided with a through hole 181 at the lower part and a through hole 182 at the top which is directed horizontally. An electric wire is passed through the through hole 181, one end of the electric wire is electrically connected with the electric heating wire 21, and the other end of the electric wire is connected with the power supply in the shell 1. When the stop table 19 moves upwards with the heating cylinder 18 and abuts against the bottom end of the sleeve 11, the heating cylinder 18 moves to the limit position, at this time, the through hole 182 is aligned with the detection end of the infrared temperature sensor 22, but the slide rod 13 continues to move upwards, the distance between the magnet 14 and the magnet 17 gradually shortens, and the slide rod 13 gradually extends into the heating cylinder 18, and the hot air heated by the electric heating wire 21 will flow upwards in the heating cylinder 18. Therefore, under the action of the slide rod 13, the hot air heated by the electric heating wire 21 tends to be discharged through the through hole 182, which is beneficial to the infrared temperature sensor 22 to detect faster, thereby saving the self-checking time and improving the self-checking efficiency.

[0025] When the slide rod 13 moves downwards, the heating cylinder 18 slides downwards on the sleeve 11. If the heating cylinder 18 does not slide downwards normally, the slide rod 13 presses the bottom end of the positioning cylinder 15 by the magnet 14, thereby driving the heating cylinder 18 to move downwards by the bottom ring 16. When the slide rod 13 moves to the limit lowest position, the structure of the top end of the positioning cylinder 15 which protrudes outward will press on the top of the limiting frame 10. The through hole 182 of the heating cylinder 18 can move downwards to the height which is blocked by the sleeve 11, but the through hole 181 is always not blocked by the sleeve 11. At this time, the hot air in the heating cylinder 18 mainly dissipates heat through the through hole 181, which prevents the infrared temperature sensor 22 on the side above the heating cylinder 18 which is in the normal monitoring state from being affected.

[0026] The communication module is arranged in the shell 1 and is in communication connection with the infrared temperature sensor 22, the heating assembly and the driving assembly respectively. The central controller is in remote communication connection with the communication module, so as to receive the temperature detection result of the infrared temperature sensor 22 and control the operation of the heating assembly and the driving assembly. When the driving assembly is controlled to perform the self-checking of the infrared temperature sensor 22, the electric heating wire 21 is also turned on.

[0027] The embodiment can remotely detect whether the infrared temperature sensor 22 is in normal operation state, saves labor and has high detection efficiency. After the infrared temperature sensor 22 is self-checked, the detection personnel can quickly move the heating cylinder 18 downward, and the infrared temperature sensor 22 is used to detect the temperature of the roller of the belt conveyor again, so that the interruption time of normal temperature monitoring is shortened. When the infrared temperature sensor 22 is self-checked by the heating cylinder 18, if the infrared temperature sensor 22 fails to detect the temperature rise, it indicates that the infrared temperature sensor 22 is faulty and needs to be repaired or replaced; if the infrared temperature sensor 22 can detect the temperature rise, it indicates that the infrared temperature sensor 22 is in normal operation, and the remote self-checking is convenient and efficient.

[0028] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited thereto, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application.

Claims

1. A self-testing mechanism for an infrared temperature sensor, characterized in that, include: Outer shell (1); An infrared temperature sensor (22) is mounted on the housing (1), with the detection end located on the outside of the housing (1); The self-testing component includes a sleeve (11) disposed on the outer shell (1), a heating cylinder (18) slidably disposed on the sleeve (11), a heating component disposed inside the heating cylinder (18), and a driving component disposed inside the outer shell (1) and driving the heating cylinder (18) to move upward to block the outside of the detection end of the infrared temperature sensor (22) or to move downward from the outside of the detection end. When the heating cylinder (18) moves upward to block the outside of the detection end of the infrared temperature sensor (22), the heat generated by the heating component is used to perform a self-test on the infrared temperature sensor (22). When the heating cylinder (18) moves downward from the outside of the detection end, the self-test on the infrared temperature sensor (22) is released. The communication module is connected to the infrared temperature sensor (22), the heating component and the driving component respectively; The central controller is remotely connected to the communication module.

2. The infrared temperature sensor self-testing mechanism according to claim 1, characterized in that, The heating assembly includes a mounting plate (20) disposed inside the heating cylinder (18) and an electric heating wire (21) disposed on the mounting plate (20).

3. The infrared temperature sensor self-testing mechanism according to claim 1, characterized in that, The drive assembly includes a bracket (2) disposed in the housing (1), a motor (3) disposed on the bracket (2), a cam (4) disposed at the output end of the motor (3), a mounting shaft (71) disposed in the housing (1), a lever (7) disposed on the mounting shaft (71) for rotation, and a lifting assembly disposed at one end of the lever (7), with the cam (4) pressed against the other end of the lever (7).

4. The infrared temperature sensor self-testing mechanism according to claim 3, characterized in that, The bracket (2) is equipped with a limit switch (6), and the cam (4) is equipped with two push rods (5). When one push rod (5) triggers the limit switch (6), the lifting component moves up to the maximum height. When the other push rod (5) triggers the limit switch (6), the lifting component moves down to the minimum height.

5. The infrared temperature sensor self-testing mechanism according to claim 3, characterized in that, The lifting assembly includes a lifting frame (9), a limiting frame (10) disposed in the housing (1), a spring (12) tensioned between the lifting frame (9) and the limiting frame (10), a slide rod (13) vertically disposed on the lifting frame (9), a bottom ring (16) disposed at the bottom end of the heating cylinder (18), and a positioning cylinder (15) disposed at the bottom of the bottom ring (16). The slide rod (13) slides through the bottom ring (16). The lifting frame (9) has a strip hole (91). A pin (8) is installed at the end of the lever (7). The pin (8) slides in the strip hole (91).

6. The infrared temperature sensor self-testing mechanism according to claim 5, characterized in that, The outer circumferential surface of the positioning cylinder (15) has vertically distributed guide strips, and the positioning cylinder (15) is vertically slidably mounted on the limiting frame (10) through the guide strips.

7. The infrared temperature sensor self-testing mechanism according to claim 6, characterized in that, The bottom end of the positioning cylinder (15) extends inward, the inner diameter of the bottom ring (16) is smaller than the inner diameter of the top end of the positioning cylinder (15), and the top end of the positioning cylinder (15) protrudes outward along the radial direction.

8. The infrared temperature sensor self-testing mechanism according to claim 7, characterized in that, A magnet (14) is provided on the slide rod (13). The magnet (14) is located inside the positioning cylinder (15). A magnet (17) is provided at the bottom of the bottom ring (16) that is magnetically repulsive to the magnet (14). A baffle (19) is provided on the outer circumference of the heating cylinder (18) located below the sleeve (11). The heating cylinder (18) has a through hole (181) at the bottom and a through hole (182) at the top facing the horizontal direction.

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