An apparatus for monitoring combustible gases in an underground confined space

Abstract

This invention discloses a combustible gas monitoring device for underground confined spaces, relating to the field of gas detection. It includes four detection displacement control mechanisms and one gas detection mechanism. The gas detection mechanism is connected to each of the detection displacement control mechanisms via winding ropes. Each detection displacement control mechanism includes a housing, with a mounting plate fixed to the top and a wire hopper fixed to the bottom. The four detection displacement control mechanisms control the movement position of the gas detection mechanism via four winding ropes, significantly improving the detection range and making the detection of combustible gases in confined spaces more comprehensive. Furthermore, a cleaning component is installed within the gas detection mechanism, requiring no electricity. The combustible gas sensor is cleaned only during each acceleration and deceleration movement of the gas detection mechanism, preventing dust blockage and ensuring both safety and optimal performance of the combustible gas sensor.

Description

Technical Field

[0001] This invention relates to the field of gas detection, specifically to a device for monitoring combustible gases in underground enclosed spaces. Background Technology

[0002] Underground enclosed spaces refer to spaces where underground air is extremely difficult to circulate, such as underground mine tunnels. After being sealed for a long time, these underground enclosed spaces not only experience a significant drop in oxygen concentration but also produce many flammable gases. These flammable gases are complex; some gases are denser than air and settle to the lower atmosphere, while others are less dense and float in the upper atmosphere. Detection in such environments requires testing at various points within the space to obtain accurate results. Therefore, many fixed flammable gas detection devices cannot perform comprehensive testing.

[0003] Upon review, it was found that most current technologies rely on fans to drive airflow to obtain accurate detection results. However, this method of airflow poses significant safety hazards (it can easily cause explosions). Existing patented technologies, such as the lifting gas detector with application number CN201310593052.X, can only perform vertical lifting detection, resulting in a small detection range and incomplete detection. Furthermore, after prolonged detection, dust accumulation can lead to inaccurate detection results. Summary of the Invention

[0004] The purpose of this invention is to provide a combustible gas monitoring device for underground enclosed spaces to solve the above-mentioned problems.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a combustible gas monitoring device for underground enclosed space, comprising four detection displacement control mechanisms and one gas detection mechanism, wherein the gas detection mechanism is connected to each of the detection displacement control mechanisms by a winding rope;

[0006] The displacement detection control mechanism includes a housing, a mounting plate fixed to the top of the housing, a wire hopper fixed to the bottom of the housing, and a winding rope take-up and release assembly and a winding rope measuring assembly fixed inside the housing.

[0007] The gas detection mechanism includes a connecting plate, a controller is fixed to the top of the connecting plate, a protective cover is fixed to the bottom of the connecting plate, a combustible gas sensor is provided inside the protective cover, a cleaning component is provided below the combustible gas sensor, a vent hole is provided at the bottom of the protective cover, and a vent hole opening and closing component is provided on the protective cover near the vent hole.

[0008] Preferably, the cleaning assembly includes a rotating sphere, a brush fixed to the top of the rotating sphere, a weight fixed to the bottom of the rotating sphere, the rotating sphere being hinged to an annular ball sleeve, the annular ball sleeve being fixed to the inside of the protective cover via a support frame, and the tip of the brush contacting the combustible gas sensor.

[0009] Preferably, the vent opening and closing assembly includes four arc-shaped partitions hinged to the protective cover, four levers hinged to the protective cover, and four tension springs. The tension springs connect the levers to the protective cover, and one end of each lever away from the arc-shaped partition is fixed to one end of a winding rope.

[0010] Preferably, the protective cover is fixed with four hinged support rods, and each actuating rod has a support seat fixed at its middle position. The actuating rod is hinged to the protective cover through the support seat and the hinged support rod. The end of the actuating rod near the arc-shaped partition abuts against the arc-shaped partition. The protective cover is also fixed with four hinge seats, and the arc-shaped partition is hinged to the protective cover through the hinge seats.

[0011] Preferably, the winding and unwinding assembly includes a winding drum rotatably disposed inside the housing, a first gear fixed on the winding drum, a second gear meshing with the first gear, a worm gear fixed to the second gear, a worm meshing with the worm gear, and a motor for controlling the rotation of the worm. One end of the winding rope is wound on the winding drum. The second gear and the worm gear are jointly fixed on a rotating shaft. The worm is fixed to the motor shaft of the motor. The motor is fixed to the mounting plate. Two support blocks are provided at both ends of the rotating shaft. One support block is fixed to the mounting plate, and the other support block is fixed to a fixed support plate. The rotating shaft and the two support blocks are in a rotatable fit.

[0012] Preferably, the winding rope measuring assembly includes two fixed support plates fixed inside the housing, with a guide wheel between the two fixed support plates. The guide wheel is rotatably engaged with the two fixed support plates. An encoder is also fixed on the fixed support plates, with its encoder input shaft fixedly connected to the guide wheel. A pressure wheel is also rotatably disposed between the fixed support plates. The winding rope passes between the pressure wheel and the guide wheel. The winding rope can drive the guide wheel to rotate through friction. The encoder can determine the winding and unwinding status of the winding rope by the number of rotations of the guide wheel, thereby determining the position of the gas detection mechanism among the four detection displacement control mechanisms.

[0013] Preferably, the winding rope measuring assembly further includes a slider that rotates with the pressure wheel, a slide bar fixed on the slider, a slide groove opened on the fixed support plate, and a spring, the slide bar sliding in the slide groove, and the spring connecting the mounting plate to the slider.

[0014] In summary, the present invention has the following beneficial effects: The four detection displacement control mechanisms of the present invention control the active position of the gas detection mechanism through four winding ropes, which can greatly improve the detection range of the gas detection mechanism and make the detection effect of combustible gas in the confined space more comprehensive. At the same time, a cleaning component is set in the gas detection mechanism, which does not require electricity and can clean the combustible gas sensor only during each acceleration and deceleration movement of the gas detection mechanism, preventing the combustible gas sensor from being blocked by dust. This is both safe and ensures the good working performance of the combustible gas sensor. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the gas detection mechanism in an embodiment of the present invention;

[0018] Figure 3 This is a top view of the gas detection mechanism in an embodiment of the present invention;

[0019] Figure 4 This is an embodiment of the present invention. Figure 3 Sectional view along the AA direction;

[0020] Figure 5 This is an embodiment of the present invention. Figure 3 Sectional view along the BB direction;

[0021] Figure 6 This is a schematic diagram of the internal structure of the displacement control mechanism after the housing is removed in an embodiment of the present invention;

[0022] Figure 7 This is a schematic diagram of the structure of some parts of the winding rope measuring component and the winding rope take-up and release component in an embodiment of the present invention.

[0023] In the diagram: 11. Mounting plate; 12. Housing; 13. Winding rope; 14. Controller; 15. Connecting plate; 16. Protective cover; 17. Arc-shaped partition; 18. Actuating lever; 19. Winding drum; 20. First gear; 21. Wire hopper; 22. Encoder; 23. Fixed support plate; 24. Wire wheel; 25. Second gear; 26. Worm gear; 27. Motor; 28. Slide groove; 29. ​​Slide bar; 30. Spring; 31. Slider; 32. Pressure wheel; 33. Worm; 34. Support block; 35. Rotating shaft; 36. Combustible gas sensor; 37. Annular ball sleeve; 38. Support frame; 39. Rotating ball; 40. Weight; 41. Brush; 42. Vent; 44. Support base; 45. Hinge base; 46. Hinge support rod; 47. Tension spring; 50. Displacement detection control mechanism; 60. Gas detection mechanism. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] Combined with appendix Figures 1-7 The aforementioned combustible gas monitoring device for underground enclosed spaces includes four detection displacement control mechanisms 50 and one gas detection mechanism 60, wherein the gas detection mechanism 60 is connected to each of the detection displacement control mechanisms 50 by a winding rope 13.

[0026] The detection displacement control mechanism 50 includes a housing 12, a mounting plate 11 fixed to the top of the housing 12, a wire hopper 21 fixed to the bottom of the housing 12, and a winding rope take-up and release assembly and a winding rope measuring assembly fixed inside the housing 12.

[0027] The gas detection mechanism 60 includes a connecting plate 15, a controller 14 fixed to the top of the connecting plate 15, a protective cover 16 fixed to the bottom of the connecting plate 15, a combustible gas sensor 36 inside the protective cover 16, a cleaning component below the combustible gas sensor 36, a vent hole 42 at the bottom of the protective cover 16, and a vent hole opening and closing component on the protective cover 16 near the vent hole 42.

[0028] Advantageously, the cleaning assembly includes a rotating ball 39, with a brush 41 fixed to the top end of the rotating ball 39 and a weight 40 fixed to the bottom end of the rotating ball 39. The rotating ball 39 is spherically hinged to an annular ball sleeve 37, which is fixed to the inside of the protective cover 16 via a support frame 38. The tip of the brush 41 contacts the combustible gas sensor 36.

[0029] Advantageously, the vent opening and closing assembly includes four arc-shaped partitions 17 hinged to the protective cover 16, four actuating rods 18 hinged to the protective cover 16, and four tension springs 47. The tension springs 47 connect the actuating rods 18 to the protective cover 16, and one end of each actuating rod 18 away from the arc-shaped partition 17 is fixed to one end of a winding rope 13.

[0030] Advantageously, four hinged support rods 46 are fixed on the protective cover 16, and a support seat 44 is fixed at the middle position of each actuating rod 18. The actuating rod 18 is hinged to the protective cover 16 through the support seat 44 and the hinged support rod 46. One end of the actuating rod 18 near the arc-shaped partition 17 abuts against the arc-shaped partition 17. Four hinge seats 45 are also fixed on the protective cover 16, and the arc-shaped partition 17 is hinged to the protective cover 16 through the hinge seats 45.

[0031] Advantageously, the winding and unwinding assembly includes a winding drum 19 rotatably disposed inside the housing 12, a first gear 20 fixed on the winding drum 19, a second gear 25 meshing with the first gear 20, a worm gear 26 fixed with the second gear 25, a worm 33 meshing with the worm gear 26, and a motor 27 controlling the rotation of the worm 33. One end of the winding rope 13 is wound on the winding drum 19. The second gear 25 and the worm gear 26 are jointly fixed on a rotating shaft 35. The worm 33 is fixed to the motor shaft of the motor 27. The motor 27 is fixed to the mounting plate 11. Two support blocks 34 are provided at both ends of the rotating shaft 35. One support block 34 is fixed to the mounting plate 11, and the other support block 34 is fixed to a fixed support plate 23. The rotating shaft 35 and the two support blocks 34 are in a rotatable engagement.

[0032] Advantageously, the winding rope measuring assembly includes two fixed support plates 23 fixed inside the housing 12, with a guide wheel 24 disposed between the two fixed support plates 23. The guide wheel 24 is rotatably engaged with the two fixed support plates 23. An encoder 22 is also fixed on the fixed support plates 23, and the encoder input shaft of the encoder 22 is fixedly connected to the guide wheel 24. A pressure wheel 32 is also rotatably disposed between the fixed support plates 23. The winding rope 13 passes between the pressure wheel 32 and the guide wheel 24. The winding rope 13 can drive the guide wheel 24 to rotate through friction. The encoder 22 can determine the winding and unwinding status of the winding rope 13 by the number of rotations of the guide wheel 24, thereby determining the position of the gas detection mechanism 60 among the four detection displacement control mechanisms 50.

[0033] Advantageously, the winding rope measuring assembly also includes a slider 31 that rotates with the pressure wheel 32, a slide bar 29 fixed on the slider 31, a slide groove 28 opened on the fixed support plate 23, and a spring 30. The slide bar 29 slides in the slide groove 28, and the spring 30 connects the mounting plate 11 to the slider 31.

[0034] How to use this invention:

[0035] In the initial state: the four detection displacement control mechanisms 50 are fixedly installed on the top of the enclosed space, and the four detection displacement control mechanisms 50 are connected to form a rectangle. The gas detection mechanism 60 is located at the center of the four detection displacement control mechanisms 50 and is at its highest position. The winding rope 13 between the detection displacement control mechanism 50 and the gas detection mechanism 60 is taut. The tension spring 47 is stretched by the winding rope 13. The actuating rod 18 abuts against the arc-shaped partition 17. The arc-shaped partition 17 blocks the vent 42 on the protective cover 16. The weight 40, the rotating ball 39 and the brush 41 are all stationary.

[0036] Four displacement detection control mechanisms 50 operate simultaneously. In each displacement detection control mechanism 50, motor 27 starts, and the motor shaft of motor 27 drives worm 33 to rotate. Worm 33 drives worm wheel 26 to rotate, worm wheel 26 drives second gear 25 fixed to it to rotate, second gear 25 drives first gear 20 meshing with it to rotate, first gear 20 drives rope drum 19 fixed to it to rotate, and the rotation of rope drum 19 winds and unwinds the winding rope 13. When the winding rope 13 is released, the tension spring 47 is no longer under the tension of the winding rope 13, and the tension spring 47 shortens. The actuating lever 18 rotates, and it no longer abuts against the arc-shaped partition 17. The arc-shaped partition 17 loses the abutting effect of the actuating lever 18 and rotates around the hinge seat 45 under gravity. The arc-shaped partition 17 no longer blocks the vent 42 of the protective cover 16, opening the vent 42. Gas from outside the protective cover 16 enters and is detected by the combustible gas sensor 36. The gas detection mechanism 60 can be controlled at four detection positions by the four detection displacement control mechanisms 50 jointly controlling the winding and unwinding of the four winding ropes 13. The gas detection mechanism 60 can move freely within the three-dimensional space below the displacement control mechanism 50. For example, when the gas detection mechanism 60 is at the center of the four displacement control mechanisms 50, the four displacement control mechanisms 50 release the winding rope 13 simultaneously at high speed. At this time, the entire gas detection mechanism 60 moves vertically downward. When the two displacement control mechanisms 50 on one side of the gas detection mechanism 60 wind up the winding rope 13, and the two displacement control mechanisms 50 on the other side of the gas detection mechanism 60 release the winding rope 13, the gas detection mechanism 60 moves closer to the winding rope. The two detection displacement control mechanisms 50 in direction 13 move together. When one detection displacement control mechanism 50 winds up the winding rope 13 and the other detection displacement control mechanisms 50 release the winding rope 13, the gas detection mechanism 60 will move towards the detection displacement control mechanism 50 that is closer to the winding rope 13. As long as the winding rope 13 is long enough, by changing the winding and releasing state of each gas detection mechanism 60 on the winding rope 13, the gas detection mechanism 60 can reach any position in the three-dimensional space below the four detection displacement control mechanisms 50 for detection, with a large detection range.

[0037] When the rope drum 19 rotates to wind and unwind the rope 13, the winding rope 13 drives the guide wheel 24 to rotate. The guide wheel 24 inputs the rotation signal to the encoder 22, and the controller controls the motor 27 to rotate based on the signal feedback from the encoder 22.

[0038] At the same time, the moment the winding rope 13 controls the entire gas detection mechanism 60 from a standstill to a moving speed, the weight 40 begins to swing due to inertia. The weight 40 drives the rotating ball 39 to rotate, and the rotating ball 39 drives the brush 41 to swing. The brush 41 cleans the combustible gas sensor 36 to prevent the combustible gas sensor 36 from being covered by dust.

[0039] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand and implement the present invention. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A combustible gas monitoring device for underground confined spaces, comprising four detection displacement control mechanisms (50) and one gas detection mechanism (60), characterized in that: The gas detection mechanism (60) is connected to each of the detection displacement control mechanisms (50) via a winding rope (13); The detection displacement control mechanism (50) includes a housing (12), a mounting plate (11) is fixed on the top of the housing (12), a wire hopper (21) is fixed on the bottom of the housing (12), and a winding rope take-up and release assembly and a winding rope measuring assembly are fixed inside the housing (12). The gas detection mechanism (60) includes a connecting plate (15), a controller (14) is fixed on the top of the connecting plate (15), a protective cover (16) is fixed on the bottom of the connecting plate (15), a combustible gas sensor (36) is provided inside the protective cover (16), a cleaning component is provided below the combustible gas sensor (36), a vent hole (42) is provided at the bottom of the protective cover (16), and a vent hole opening and closing component is provided on the protective cover (16) near the vent hole (42); The cleaning assembly includes a rotating ball (39), a brush (41) fixed to the top of the rotating ball (39), a weight (40) fixed to the bottom of the rotating ball (39), the rotating ball (39) being spherically hinged to an annular ball sleeve (37), the annular ball sleeve (37) being fixed to the inside of the protective cover (16) via a support frame (38), and the tip of the brush (41) contacting the combustible gas sensor (36). The vent opening and closing assembly includes four arc-shaped partitions (17) hinged to the protective cover (16), four levers (18) hinged to the protective cover (16), and four tension springs (47). The tension springs (47) connect the levers (18) to the protective cover (16), and one end of each lever (18) away from the arc-shaped partition (17) is fixed to one end of a winding rope (13). Four hinged support rods (46) are fixed on the protective cover (16). A support seat (44) is fixed at the middle position of each actuating rod (18). The actuating rod (18) is hinged to the protective cover (16) through the support seat (44) and the hinged support rod (46). The end of the actuating rod (18) near the arc-shaped partition (17) abuts against the arc-shaped partition (17). Four hinge seats (45) are also fixed on the protective cover (16). The arc-shaped partition (17) is hinged to the protective cover (16) through the hinge seats (45).

2. The combustible gas monitoring device for underground confined spaces according to claim 1, characterized in that: The winding rope take-up and unwinding assembly includes a winding drum (19) rotatably disposed inside the housing (12), a first gear (20) fixed on the winding drum (19), a second gear (25) meshing with the first gear (20), a worm gear (26) fixed with the second gear (25), a worm (33) meshing with the worm gear (26), and a motor (27) controlling the rotation of the worm (33). One end of the winding rope (13) is wound on the winding drum (19), and the second gear... The gear (25) and the worm gear (26) are fixed together on the rotating shaft (35). The worm (33) is fixed to the motor shaft of the motor (27). The motor (27) is fixed to the mounting plate (11). Two support blocks (34) are provided at both ends of the rotating shaft (35). One support block (34) is fixed to the mounting plate (11), and the other support block (34) is fixed to the fixed support plate (23). The rotating shaft (35) and the two support blocks (34) are in rotational engagement.

3. The combustible gas monitoring device for underground confined spaces according to claim 1, characterized in that: The winding rope measuring assembly includes two fixed support plates (23) fixed inside the housing (12). A guide wheel (24) is provided between the two fixed support plates (23). The guide wheel (24) is rotatably engaged with the two fixed support plates (23). An encoder (22) is also fixed on the fixed support plate (23). The encoder input shaft of the encoder (22) is fixedly connected to the guide wheel (24). A pressure wheel (32) is also rotatably provided between the fixed support plates (23). The winding rope (13) passes between the pressure wheel (32) and the guide wheel (24). The winding rope (13) can drive the guide wheel (24) to rotate through friction.

4. A combustible gas monitoring device for underground confined spaces according to claim 3, characterized in that: The winding rope measuring assembly also includes a slider (31) that rotates with the pressure wheel (32), a slide bar (29) fixed on the slider (31), a groove (28) opened on the fixed support plate (23), and a spring (30). The slide bar (29) slides in the groove (28), and the spring (30) connects the mounting plate (11) to the slider (31).

Images