Coal drilling cutting gas desorption index and desorption rate integrated measuring device

Abstract

The invention belongs to the technical field of measuring devices, and particularly relates to a coal drilling cutting gas desorption index and desorption rate integrated measuring device which comprises a box body and a partition plate, the partition plate is arranged in the box body, a weighing assembly is arranged in the box body and abuts against the partition plate, a coal sample tank is arranged on the partition plate, and a coal cup used for containing a coal sample is arranged in the coal sample tank. A desorption box is connected to one side, far away from the partition plate, of the box body; one end, far away from the partition plate, of the coal sample tank communicates with the desorption box; a micro air pressure sensor and a micro air flow sensor are arranged in the desorption box, and a pressure release valve is arranged on the desorption box. The micro airflow sensor is used for measuring the desorption rate of the gas, and the micro air pressure sensor is used for measuring the desorption index of the gas, so that the function of integrating the measurement of the gas rate and the measurement of the desorption index into the same measuring device is realized, and the application range of the measuring device is expanded.

Description

Technical Field

[0001] The invention belongs to the technical field of measuring devices, in particular to a device for measuring coal drill cuttings gas desorption index and desorption rate in an integrated manner. Background Art

[0002] Coal and gas outbursts are complex dynamic phenomena that occur during coal mining operations and are a typical type of mine disaster. Coal and gas outburst prediction can be categorized into two main categories: regional and face-level prediction. Prediction methods can be further categorized, each playing a significant role in detecting coal and gas outbursts. However, different methods have limitations, and indicator thresholds and prediction accuracy vary across mining areas and coal seams. Therefore, there is a need to improve the methods for determining coal and gas outburst prediction indicators.

[0003] In recent years, drill cuttings gas desorption index Δh2 and gas desorption rate K1 have been widely used to predict coal and gas outburst hazards. However, current devices for measuring these indicators suffer from low automation, portability, complex operation, and low accuracy. Furthermore, there is currently no mature device that can simultaneously measure both coal seam desorption index Δh2 and gas desorption rate K1.

[0004] Therefore, in order to solve the above problems, a device for measuring the desorption index and desorption rate of coal cuttings gas is proposed. Summary of the Invention

[0005] (1) Technical problems solved

[0006] In view of the shortcomings of the prior art, the present invention provides an integrated measuring device for coal drill cuttings gas desorption index and desorption rate, which is used to solve the problems raised in the background technology.

[0007] (2) Technical solution

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a device for integrated measurement of coal drill cuttings gas desorption index and desorption rate, comprising a housing and a partition, the partition being disposed in the housing, a weighing assembly being disposed in the housing, the weighing assembly being in contact with the partition, a coal sample can being disposed on the partition, the coal sample can being provided with a coal cup for placing a coal sample, a desorption box being connected to a side of the housing away from the partition, and an end of the coal sample can being in communication with the desorption box away from the partition;

[0009] A micro air pressure sensor and a micro air flow sensor are provided in the desorption box, and a pressure relief valve is provided on the desorption box.

[0010] Preferably, a data acquisition component is provided in the desorption box, and the data acquisition component includes a battery, a single-chip microcomputer and a circuit board. The battery is arranged in the desorption box, and the battery is arranged opposite to the micro air pressure sensor. The single-chip microcomputer is arranged on the side of the battery away from the micro air pressure sensor. A wireless Bluetooth module and a timer are connected to the single-chip microcomputer, and the circuit board is arranged on the side of the single-chip microcomputer away from the battery.

[0011] Preferably, the end of the coal sample tank away from the partition is connected to the desorption box through a desorption pipe, a valve plate is rotatably connected in the desorption pipe, a motor is provided outside the desorption pipe, and the output end of the motor is connected to the rotating shaft of the valve plate.

[0012] Preferably, the coal sample tank is connected to a simulation component for simulating the distribution area of ​​coal in the mine, and the simulation component includes a frame and a simulation plate. The frame is connected to the coal sample tank, and a sealing ring is provided on the simulation plate. The sealing ring is slidably connected to the inner wall of the frame. The frame is connected to the coal sample tank, and the simulation plate extends into the coal sample tank and abuts against the coal cup. The simulation plate is used to adjust the opening size of the coal cup, and the frame is provided with a driving component for controlling the movement of the simulation plate.

[0013] Preferably, the driving assembly includes a driving member and a control member, one side of the driving member cooperates with the rotating shaft of the valve plate, and the other side cooperates with the control member, and the control member is used to control the simulation plate to move back and forth along the inner wall of the frame;

[0014] The control component includes a control frame and a control shaft, the control frame is arranged on the tank body, the control shaft is rotatably connected to the control frame, and control gears are provided at both ends of the control shaft. The simulation board is provided with a first rack and a second rack, each of the first rack and the second rack corresponds to a control gear, and the first rack and the second rack are both engaged with the control gears at corresponding positions.

[0015] Preferably, the driving member includes a bracket and a main shaft, the bracket is arranged on the frame, the main shaft is rotatably connected to the bracket, one end of the main shaft is provided with a control disk, and the other end is provided with a first bevel gear, and the side of the control disk close to the frame is provided with a section of gear teeth matching the control gear along its own circumferential direction, the rotating shaft of the valve plate extends out of the desorption tube and is connected to the second bevel gear, and the second bevel gear is meshed with the first bevel gear.

[0016] Preferably, the main shaft includes a first shaft body and a second shaft body, the first shaft body is rotatably connected to the bracket, a connecting rod is provided on the first shaft body, a connecting groove is provided on the second shaft body, the connecting rod is slidably connected to the inner wall of the connecting groove, a spring is provided in the connecting groove, one end of the spring is connected to the connecting rod, and the other end is connected to the inner wall of the connecting groove, and the first bevel gear is arranged at an end of the second shaft body away from the first shaft body.

[0017] Preferably, the bracket is provided with a control component for controlling the engagement of the first bevel gear and the second bevel gear, the control component includes a control ring and an electromagnet, the control ring is rotatably connected to the side of the first bevel gear close to the bracket, the electromagnet is arranged on the bracket, and the side of the control ring close to the bracket is provided with a magnetic block that cooperates with the electromagnet.

[0018] (3) Beneficial effects

[0019] Compared with the prior art, the present invention provides an integrated device for measuring coal drill cuttings gas desorption index and desorption rate, which has the following beneficial effects:

[0020] 1. The present invention integrates the functions of measuring the gas desorption rate and the desorption index into one measuring device by providing a micro air flow sensor to measure the gas desorption rate and a micro air pressure sensor to measure the gas desorption index, thereby increasing the applicability of the measuring device.

[0021] 2. The present invention provides a valve plate that gradually changes the size of the communication space between the coal sample tank and the desorption box to simulate the scenario of continuous exposure of coal samples in a mine, thereby improving the accuracy of the measuring device during testing.

[0022] 3. The present invention improves the authenticity of the simulation by setting up a simulation component, which simulates scenes of different areas exposed at different locations in the coal mine, thereby further improving the accuracy of the measurement device during testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a structural diagram of the present invention for reflecting the positional relationship between the coal sample tank and the partition;

[0026] Figure 3 This invention Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0027] Figure 4 yes Figure 2 A partial enlarged view of point A in the middle.

[0028] In the figure: 1. Box; 11. Control box; 2. Partition; 3. Weighing assembly; 4. Coal sample tank; 41. Coal cup; 42. Door panel; 421. First magnet; 43. Second magnet; 44. Desorption tube; 45. Valve plate; 451. Second bevel gear; 46. Motor; 47. Simulation assembly; 471. Frame; 472. Simulation board; 473. Sealing ring; 474. First rack; 475. Second rack; 5. Desorption box; 51. Micro pressure sensor; 52. Micro air flow sensor; 53. Pressure relief valve ;6. Data acquisition component;61. Battery;62. Single-chip microcomputer;621. Wireless Bluetooth module;622. Timer;63. Circuit board;7. Drive component;71. Control frame;72. Control shaft;73. Control gear;74. Bracket;75. Main shaft;751. First shaft;752. Second shaft;753. Connecting rod;754. Connecting groove;756. Spring;76. Control panel;761. Gear teeth;77. First bevel gear;8. ​​Control component;81. Control ring;82. Electromagnet. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] The following are specific examples, see Figures 1-4 .

[0031] Example 1:

[0032] See also Figure 1-Figure 3 The present invention provides a technical solution: an integrated measuring device for coal drill cuttings gas desorption index and desorption rate, comprising a box body 1 and a partition 2, wherein the partition 2 is fixed in the box body 1, and a weighing assembly 3 is provided in the box body 1, and the weighing assembly 3 is in contact with the partition 2. A coal sample tank 4 is provided on the partition 2, and a coal cup 41 for placing the coal sample is provided in the coal sample tank 4. A desorption box 5 is connected to the side of the box body 1 away from the partition 2, and an end of the coal sample tank 4 away from the partition 2 is connected to the desorption box 5. A micro air pressure sensor 51 and a micro airflow sensor 52 are provided in the desorption box 5, and a pressure relief valve 53 is connected to the desorption box 5.

[0033] Reference Figure 1 In order to facilitate the placement of the coal sample in the coal sample tank 4 , a door panel 42 is rotatably connected to the coal sample tank 4 , a first magnet 421 is embedded in the door panel 42 , and a second magnet 43 matching the first magnet 421 is embedded in the coal sample tank 4 .

[0034] When testing a coal sample, the pressure relief valve 53 is first opened. The micro pressure sensor 51 and micro airflow sensor 52 are used to measure the stability of the air pressure and airflow within the desorption box 5 and the coal sample tank 4. Once the air pressure and airflow are stable, the pressure relief valve 53 is closed, cutting off the connection between the coal sample tank 4 and the desorption box 5. The worker then places the drilled coal sample in the coal cup 41 and smoothes the surface of the coal sample. The coal cup 41 is then placed in the coal sample tank 4. The first magnet 421 and the second magnet 43 engage to seal the coal sample tank 4 with the door panel 42.

[0035] Weighing assembly 3 weighs the coal sample in coal cup 41. Once weighed, it connects coal sample tank 4 to desorption box 5. A micro airflow sensor 52 measures the gas desorption rate, while a micro pressure sensor 51 measures the pressure difference at which gas desorption begins, thereby determining the gas desorption index.

[0036] Reference Figure 1 In order to facilitate the recording and transmission of the measured data, a data acquisition component 6 is provided in the desorption box 5. The data acquisition component 6 includes a battery 61, a single-chip microcomputer 62 and a circuit board 63. The battery 61 is arranged in the desorption box 5, and the battery 61 is arranged opposite to the micro air pressure sensor 51. The single-chip microcomputer 62 is arranged on the side of the battery 61 away from the micro air pressure sensor 51. The single-chip microcomputer 62 is connected to the single-chip microcomputer 62 with a wireless Bluetooth module 621 and a timer 622. The circuit board 63 is arranged on the side of the single-chip microcomputer 62 away from the battery 61. The battery 61 is used to power the single-chip microcomputer 62, the circuit board 63, the timer 622 and the wireless and Bluetooth transmission modules. The timer 622 is used to record the working time of the micro air pressure sensor 51 and the micro airflow sensor 52.

[0037] The weighing assembly 3 is configured as an electronic scale. A control box 11 is provided in the housing 1. The electronic scale is mounted on the control box 11. The control box 11 is provided with a data acquisition assembly 6, which is identical to that in the desorption box 5, for collecting, recording, and transmitting the weight of the coal sample in the coal cup 41. The battery 61 is an explosion-proof lithium battery 61.

[0038] Reference Figure 1 The side of the coal sample tank 4, away from the partition 2, is connected to the desorption box 5 via a desorption pipe 44. A valve plate 45 is rotatably connected to the desorption pipe 44. A motor 46 is connected to the outer wall of the desorption pipe 44, and the output end of the motor 46 is connected to the rotating shaft of the valve plate 45. The motor 46 controls the rotation of the valve plate 45 to gradually change the size of the space connecting the coal sample tank 4 and the desorption box 5. This facilitates the simulation of the gradual mining of coal in a mine, improves the authenticity of the simulation, and thus enhances the accuracy of the measurement device during testing.

[0039] Working principle: The micro air flow sensor 52 is used to measure the gas desorption rate, and the micro air pressure sensor 51 is used to measure the gas desorption index, realizing the integration of the gas rate measurement and the desorption index measurement into the same measuring device, thereby improving the applicability of the measuring device.

[0040] Example 2:

[0041] Reference Figure 2-Figure 4 This embodiment differs from the first embodiment of the present invention in that, to further improve the accuracy of the measurement device, a simulation assembly 47 for simulating the distribution area of ​​coal in a mine is connected to the coal sample tank 4. The simulation assembly 47 includes a frame 471 and a simulation board 472. The frame 471 is connected to the coal sample tank 4. The simulation board 472 is provided with a sealing ring 473, which is slidably connected to the inner wall of the frame 471. The sealing ring 473 is made of rubber, which has good sealing properties and reduces the possibility of air leakage from the frame 471.

[0042] The frame 471 is connected to the coal sample tank 4, the simulation board 472 extends into the coal sample tank 4 and abuts against the coal cup 41, the simulation board 472 is used to adjust the opening size of the coal cup 41, and the frame 471 is provided with a driving component 7 for controlling the movement of the simulation board 472.

[0043] Reference Figure 3 and Figure 4 The driving assembly 7 includes a driving member and a control member. One side of the driving member cooperates with the rotating shaft of the valve plate 45 and the other side cooperates with the control member. The control member is used to control the simulation plate 472 to move back and forth along the inner wall of the frame 471.

[0044] The control unit includes a control frame 71 and a control shaft 72. The control frame 71 is fixed to the tank body, and the control shaft 72 is rotatably connected to the control frame 71. Control gears 73 are fixed to both ends of the control shaft 72. A first rack 474 and a second rack 475 are fixed to the simulation board 472. Each of the first rack 474 and the second rack 475 corresponds to a control gear 73, and the first rack 474 and the second rack 475 are meshed with the control gear 73 at the corresponding position.

[0045] Reference Figure 3 and Figure 4 The drive assembly includes a bracket 74 and a main shaft 75. Bracket 74 is fixed to frame 471, and main shaft 75 is rotatably connected to bracket 74. A control disk 76 is provided at one end of main shaft 75, and a first bevel gear 77 is provided at the other end. A section of gear teeth 761 is provided along the circumference of control disk 76 on the side closest to frame 471, which mates with control gear 73. The rotating shaft of valve plate 45 extends out of desorption tube 44 and is connected to second bevel gear 451, which meshes with first bevel gear 77.

[0046] As the motor 46 controls the rotation of the valve plate 45, the rotating shaft of the valve plate 45 synchronously controls the rotation of the second bevel gear 451. The second bevel gear 451 then drives the main shaft 75 and the control disk 76 to rotate in sequence. Because the gear teeth 761 on the control disk 76 are incomplete gear teeth 761, when the gear teeth 761 contact one of the control gears 73, the control gear 73 drives the control shaft 72 to rotate clockwise. The control gear 73 then drives the first rack 474 and the second rack 475 at the corresponding position to move synchronously to control the movement of the simulation plate 472. When the gear teeth 761 contact the other control gear 73, the control gear 73 drives the control shaft 72 to rotate counterclockwise. The control gear 73 then drives the first rack 474 and the second rack 475 at the corresponding position to move synchronously to control the movement of the simulation plate 472, thereby realizing the reciprocating function of the simulation plate 472. At this time, since the simulation board 472 reciprocates to continuously adjust the opening size of the coal cup 41, the different exposure areas of the coal mines at different locations in the mine are simulated, which improves the realism of the simulation and thus improves the accuracy of the test of the measuring device.

[0047] Reference Figure 4 The main shaft 75 includes a first shaft 751 and a second shaft 752. The first shaft 751 is rotatably connected to the bracket 74. A connecting rod 753 is fixed to the first shaft 751. A connecting groove 754 is defined in the second shaft 752. The connecting rod 753 is slidably connected to the inner wall of the connecting groove 754. A spring 756 is disposed in the connecting groove 754. One end of the spring 756 is connected to the connecting rod 753 and the other end is connected to the inner wall of the connecting groove 754. The first bevel gear 77 is disposed on the end of the second shaft 752 away from the first shaft 751.

[0048] A control assembly 8 for controlling the engagement of the first bevel gear 77 and the second bevel gear 451 is provided on the bracket 74. The control assembly 8 includes a control ring 81 and an electromagnet 82. The control ring 81 is rotatably connected to the side of the first bevel gear 77 close to the bracket 74. The electromagnet 82 is arranged on the bracket 74. A magnetic block that cooperates with the electromagnet 82 is provided on the side of the control ring 81 close to the bracket 74.

[0049] When the reciprocating motion of the simulation plate 472 following the opening of the valve plate 45 is no longer required, the first bevel gear 77 and the second bevel gear 451 are separated. When the reciprocating motion of the simulation plate 472 is required, the electromagnet 82 is activated and attracts the magnet, causing the control ring 81, the first bevel gear 77, and the second shaft 752 to move. When the first bevel gear 77 and the second bevel gear 451 mesh, the electromagnet 82 contacts the magnet, compressing the spring 756. Simulated reciprocating motion is now possible.

[0050] Working principle: During the detection process, under the action of the simulation component 47, the exposure area of ​​the coal mine at different positions in the mine is simulated to improve the authenticity of the test, thereby improving the accuracy of the test of the measuring device.

[0051] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A device for measuring coal drill cuttings gas desorption index and desorption rate, characterized by: The invention comprises a box body (1) and a partition (2), wherein the partition (2) is arranged in the box body (1), a weighing assembly (3) is provided in the box body (1), the weighing assembly (3) is in contact with the partition (2), a coal sample tank (4) is provided on the partition (2), a coal cup (41) for placing coal samples is provided in the coal sample tank (4), a desorption box (5) is connected to the side of the box body (1) away from the partition (2), and an end of the coal sample tank (4) away from the partition (2) is connected to the desorption box (5); The desorption box (5) is provided with a micro air pressure sensor (51) and a micro air flow sensor (52), and the desorption box (5) is provided with a pressure relief valve (53).

2. The device for integrated determination of coal drill cuttings gas desorption index and desorption rate according to claim 1, characterized in that: The desorption box (5) is provided with a data acquisition component (6), the data acquisition component (6) comprising a battery (61), a single-chip microcomputer (62) and a circuit board (63), the battery (61) being provided in the desorption box (5), the battery (61) being arranged opposite to the micro air pressure sensor (51), the single-chip microcomputer (62) being provided on a side of the battery (61) facing away from the micro air pressure sensor (51), the single-chip microcomputer (62) being connected to a wireless Bluetooth module (621) and a timer (622), and the circuit board (63) being provided on a side of the single-chip microcomputer (62) facing away from the battery (61).

3. The device for integrated determination of coal drill cuttings gas desorption index and desorption rate according to claim 1, characterized in that: One end of the coal sample tank (4) away from the partition (2) is connected to the desorption box (5) through a desorption pipe (44), a valve plate (45) is rotatably connected to the desorption pipe (44), a motor (46) is provided on the outside of the desorption pipe (44), and the output end of the motor (46) is connected to the rotating shaft of the valve plate (45).

4. The device for integrated determination of coal drill cuttings gas desorption index and desorption rate according to claim 3, characterized in that: The coal sample tank (4) is connected to a simulation component (47) for simulating the distribution area of ​​coal in a mine. The simulation component (47) includes a frame (471) and a simulation board (472). The frame (471) is connected to the coal sample tank (4). The simulation board (472) is provided with a sealing ring (473). The sealing ring (473) is slidably connected to the inner wall of the frame (471). The frame (471) is connected to the coal sample tank (4). The simulation board (472) extends into the coal sample tank (4) and abuts against the coal cup (41). The simulation board (472) is used to adjust the opening size of the coal cup (41). The frame (471) is provided with a driving component (7) for controlling the movement of the simulation board (472).

5. The device for integrated determination of coal drill cuttings gas desorption index and desorption rate according to claim 4, characterized in that: The driving assembly (7) includes a driving member and a control member, one side of the driving member cooperates with the rotating shaft of the valve plate (45), and the other side cooperates with the control member, and the control member is used to control the simulation plate (472) to move back and forth along the inner wall of the frame (471); The control component includes a control frame (71) and a control shaft (72). The control frame (71) is arranged on the tank body. The control shaft (72) is rotatably connected to the control frame (71). Both ends of the control shaft (72) are provided with control gears (73). The simulation board (472) is provided with a first rack (474) and a second rack (475). The first rack (474) and the second rack (475) each correspond to a control gear (73). The first rack (474) and the second rack (475) are both engaged with the control gears (73) at corresponding positions.

6. The device for integrated determination of coal drill cuttings gas desorption index and desorption rate according to claim 5, characterized in that: The driving member includes a bracket (74) and a main shaft (75). The bracket (74) is arranged on the frame (471). The main shaft (75) is rotatably connected to the bracket (74). One end of the main shaft (75) is provided with a control disk (76), and the other end is provided with a first bevel gear (77). The control disk (76) is provided with a section of gear teeth (761) that match the control gear (73) along its own circumferential direction on the side close to the frame (471). The rotating shaft of the valve plate (45) extends out of the desorption pipe (44) and is connected to the second bevel gear (451). The second bevel gear (451) is meshed with the first bevel gear (77).

7. The device for integrated determination of coal drilling cuttings gas desorption index and desorption rate according to claim 1, characterized in that: The main shaft (75) includes a first shaft (751) and a second shaft (752), the first shaft (751) is rotatably connected to the bracket (74), a connecting rod (753) is provided on the first shaft (751), and a connecting groove (754) is provided on the second shaft (752), the connecting rod (753) is slidably connected to the inner wall of the connecting groove (754), a spring (756) is provided in the connecting groove (754), one end of the spring (756) is connected to the connecting rod (753), and the other end is connected to the inner wall of the connecting groove (754), and the first bevel gear (77) is arranged at one end of the second shaft (752) away from the first shaft (751).

8. The device for integrated determination of coal drilling cuttings gas desorption index and desorption rate according to claim 1, characterized in that: The bracket (74) is provided with a control assembly (8) for controlling the meshing of the first bevel gear (77) and the second bevel gear (451). The control assembly (8) comprises a control ring (81) and an electromagnet (82). The control ring (81) is rotatably connected to a side of the first bevel gear (77) close to the bracket (74). The electromagnet (82) is arranged on the bracket (74). A magnetic block that cooperates with the electromagnet (82) is provided on a side of the control ring (81) close to the bracket (74).

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