Gas pressure detector

Abstract

The utility model relates to a gas pressure detector, which relates to the technical field of mine gas monitoring equipment, and comprises a fixed plate, a detection column, a hole sealing assembly, a detection assembly and a drainage assembly, the fixed plate is fixedly arranged on the drill hole; the detection column is fixedly arranged on the fixed plate; a detection cavity is formed in the detection column; a communication hole is formed in the detection column, and the communication hole is communicated with the interior of the detection cavity; the hole sealing assembly is arranged on the fixing plate and used for conducting grouting and hole sealing on a drilled hole. The detection assembly is arranged on the fixed plate and is used for detecting the gas pressure in the detection cavity; and the drainage assembly is arranged on the fixed plate and is used for draining water in the detection space. According to the invention, the detection precision of the coal seam gas pressure can be improved.

Description

Technical Field

[0001] This application relates to the technical field of mine gas monitoring equipment, and in particular to a gas pressure detector. Background Art

[0002] The gas pressure of a coal seam is one of the basic parameters of mine gas, and it is of great significance for determining the gas content of the coal seam, controlling the gas outburst in the mine, and preventing gas outbursts.

[0003] Currently, when detecting the gas pressure of a coal seam, a hole is drilled in the rock wall, the hole penetrates into the coal seam, then a detection device is installed in the hole, and finally the hole is grouted and sealed to form a detection space. The gas inside the coal seam gradually penetrates into the detection space, and by detecting the gas pressure in the detection space, the gas pressure inside the coal seam can be determined.

[0004] When using the above method to detect the gas pressure of a coal seam, since the rock wall and the inside of the coal seam contain groundwater, the groundwater will also penetrate into the detection space and accumulate inside, affecting the detection accuracy of the detection device. Utility Model Content

[0005] In order to improve the detection accuracy of the gas pressure of a coal seam, this application provides a gas pressure detector.

[0006] A gas pressure detector provided by this application adopts the following technical solutions:

[0007] A gas pressure detector includes a fixing plate, a detection column, a hole-sealing assembly, a detection assembly, and a drainage assembly; the fixing plate is fixedly arranged on the hole; the detection column is fixedly arranged on the fixing plate; a detection cavity is formed inside the detection column; a communication hole is formed on the detection column, and the communication hole is communicated with the detection cavity inside; the hole-sealing assembly is arranged on the fixing plate and is used for grouting and sealing the hole; the detection assembly is arranged on the fixing plate and is used for detecting the gas pressure inside the detection cavity; the drainage assembly is arranged on the fixing plate and is used for draining the water inside the detection space.

[0008] By adopting the above technical solutions, when detecting the gas pressure of a coal seam, first drill a hole in the rock wall to the coal seam position, then place the detection column in the hole, then fix the fixing plate on the rock wall, use the hole-sealing assembly to grout and seal the hole to form a closed detection space inside the hole, and then use the detection assembly to detect the pressure of the gas that penetrates from the inside of the coal seam into the detection cavity. During this process, the drainage assembly continuously drains the water that penetrates into the detection space, preventing the water inside the detection space from accumulating and affecting the detection result of the gas pressure of the coal seam, thereby improving the detection accuracy of the gas pressure of the coal seam.

[0009] Optionally, the hole-sealing assembly includes a fixing ring, a limiting ring, a sliding ring, a first spring, and a grouting pipe; the fixing ring is fixedly arranged on the detection column; the limiting ring is fixedly arranged on the detection column; the sliding ring is arranged between the fixing ring and the limiting ring, and the sliding ring is slidably connected with the detection column; both ends of the first spring are fixedly connected with the limiting ring and the sliding ring respectively; the grouting pipe is arranged on the fixing plate, and a grouting pump is installed at one end of the grouting pipe for conveying slurry between the fixing ring and the sliding ring.

[0010] By adopting the above technical solution, when grouting and sealing the borehole, the grouting pump injects the hole-sealing slurry into the space between the fixing ring and the sliding ring through the grouting pipe. As the hole-sealing slurry is injected, the sliding ring gradually moves towards the limiting ring until the first spring is completely compressed and the sliding ring can no longer move. After standing for a certain period of time until the slurry solidifies, the grouting and hole-sealing are completed. The first spring is used to make the sliding ring close to the fixing ring initially, and as the hole-sealing slurry is injected, the sliding ring moves away from the fixing ring, preventing gravel or coal slag from falling between the fixing ring and the sliding ring, thus avoiding the formation of dead corners around the gravel and coal slag after the hole-sealing slurry is injected and preventing air leakage in the formed hole-sealing layer, thereby ensuring the tightness of the detection space and further improving the detection accuracy of the coal seam gas pressure.

[0011] Optionally, the drainage assembly includes a drainage pipe fixedly penetrating through the fixing plate, and one end of the drainage pipe is communicated with the inside of the detection space, and the communication point is located at the bottom of the detection space.

[0012] By adopting the above technical solution, the water in the detection space is continuously drained through the drainage pipe, thus avoiding the influence on the detection result of the coal seam gas pressure caused by the accumulation of water volume.

[0013] Optionally, the drainage assembly further includes a second spring and a floating block; one end of the second spring is fixedly connected with the detection column, the floating block is fixedly connected with the second spring, and the floating block is located at the opening of the drainage pipe.

[0014] By adopting the above technical solution, the second spring is used to make the floating block abut against the opening of the drainage pipe, thereby blocking the drainage pipe and preventing the gas in the detection space from being discharged through the drainage pipe, which affects the detection result of the coal seam gas pressure, and thus improving the detection accuracy of the coal seam gas pressure. When the water between the coal seams penetrates into the detection space, under the buoyancy of the water, the floating block floats upward and away from the drainage pipe, making the drainage pipe communicate, and the water is normally discharged through the drainage pipe. After the discharge, under the action of the second spring, the floating block blocks the drainage pipe again.

[0015] Optionally, the hole-sealing assembly further includes a slurry return pipe fixedly penetrating through the fixing plate. One end of the slurry return pipe communicates between the fixed ring and the sliding ring. An overflow valve is installed on the slurry return pipe.

[0016] By adopting the above technical solution, when the hole-sealing slurry fills the space between the fixed ring and the sliding ring, the excess input hole-sealing slurry will flow out through the slurry return pipe. When the operator sees the slurry flowing out of the slurry return pipe, the grouting pump can be closed, avoiding waste of the hole-sealing slurry and damage to the fixed ring and the sliding ring.

[0017] Optionally, the detection assembly includes a detection unit and a controller. The detection unit is fixedly arranged in the detection cavity. The detection unit is used to detect the gas pressure information in the detection cavity and convert it into a gas pressure signal for input to the controller. The controller is electrically connected to the detection unit and is used to receive the gas pressure signal transmitted by the detection unit and display it.

[0018] By adopting the above technical solution, when detecting the gas pressure in the detection cavity, the detection unit is in a working state, real-time monitoring the gas pressure and transmitting the data to the controller. The controller displays the gas pressure value, and the operator can view it through the controller.

[0019] Optionally, a warning light and a buzzer are arranged on the fixing plate. Both the warning light and the buzzer are electrically connected to the controller. The controller controls the working states of the warning light and the buzzer according to the gas pressure information in the detection cavity.

[0020] By adopting the above technical solution, when the gas pressure value in the detection cavity reaches a preset value, the controller controls the warning light and the buzzer to give an alarm, reminding the operator to respond and check in time, avoiding major accidents such as gas outbursts, and thus ensuring personal and property safety.

[0021] Optionally, a filter cover is fixedly arranged on the detection column, and the filter cover is located at the opening of the communication hole.

[0022] By adopting the above technical solution, the filter cover is used to filter the crushed stones and coal cinders in the drill hole. On the one hand, it avoids blockage of the communication hole, enabling gas to enter the detection cavity through the filter cover. On the other hand, it avoids the influence of crushed stones and coal cinders on the detection result of the gas pressure.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. By setting up a row arrangement component, the water permeating into the detection space is discharged, preventing water accumulation in the detection space and affecting the detection result of the coal seam gas pressure, thereby improving the detection accuracy of the coal seam gas pressure. When there is no water in the detection space, the second spring is used to make the floating block abut against the opening of the drain pipe, thus blocking the drain pipe and preventing the gas in the detection space from being discharged through the drain pipe, which affects the detection result of the coal seam gas pressure, and further improving the detection accuracy of the coal seam gas pressure;

[0025] 2. By setting up a slurry return pipe, when the sealing hole slurry fills the space between the fixed ring and the sliding ring, the excess input sealing hole slurry will flow out from the slurry return pipe. Once the operator sees the slurry flowing out of the slurry return pipe, the grouting pump can be turned off, avoiding waste of the sealing hole slurry and also preventing damage to the fixed ring and the sliding ring;

[0026] 3. By setting up a warning light and a buzzer, when the gas pressure value in the detection chamber reaches the preset value, the controller controls the warning light and the buzzer to give an alarm, reminding the operator to respond and check in time, avoiding major accidents such as gas outburst, and thus ensuring personal and property safety. Brief Description of the Drawings

[0027] Figure 1 is a cross-sectional view of an embodiment of the present application.

[0028] Description of the Reference Numerals:

[0029] 1. Fixed plate; 11. Warning light; 12. Buzzer;

[0030] 2. Detection column; 21. Detection chamber; 22. Communication hole; 23. Filter cover;

[0031] 3. Detection component; 31. Detection unit; 32. Controller;

[0032] 4. Sealing hole component; 41. Fixed ring; 42. Limit ring; 43. Sliding ring; 45. Grouting pipe; 46. Slurry return pipe;

[0033] 5. Drainage component; 51. Drain pipe; 52. Second spring; 53. Floating block;

[0034] 6. Rock wall; 61. Coal seam; 62. Detection space. Detailed Embodiment

[0035] The following further elaborates on the present application in conjunction with the attached Figure 1 for a more detailed description of the present application.

[0036] An embodiment of the present application discloses a gas pressure detector. Refer to Figure 1, the gas pressure detector includes a fixing plate 1, a detection column 2, a hole sealing assembly 4, a detection assembly 3 and a drainage assembly 5. Threaded holes are provided on the fixing plate 1. The detection column 2 is coaxially and fixedly arranged on the fixing plate 1. A detection cavity 21 is provided inside the detection column 2, and the detection cavity 21 is used to accommodate gas and detect the pressure. A communication hole 22 is also provided on the detection column 2, and the communication hole 22 enables the detection cavity 21 to communicate with the detection space 62 so that gas can enter the detection cavity 21.

[0037] The hole sealing assembly 4 is arranged on the fixing plate 1, and its main function is to grout and seal the drill hole. The detection assembly 3 is arranged on the fixing plate 1, and the detection assembly 3 is used to detect the gas pressure in the detection cavity 21. The drainage assembly 5 is arranged on the fixing plate 1 and is used to drain the water in the detection space 62 in time.

[0038] When detecting the gas pressure inside the coal seam 61, the operator first drills a hole in the rock wall 6 using a drilling device, and uses the threaded holes on the fixing plate 1 to fix the fixing plate 1 at the opening of the drill hole through bolts to complete the fixation of the fixing plate 1. Then, the hole sealing assembly 4 is used to grout and seal the drill hole to form a closed detection space 62 in the drill hole. The gas inside the coal seam 61 gradually penetrates into the detection space 62, and then enters the detection cavity 21 through the communication hole 22. The detection assembly 3 is in a working state to detect the gas pressure in the detection cavity 21. During this process, the drainage assembly 5 continuously drains the water that penetrates into the detection space 62 from the inside of the coal seam 61 to avoid affecting the detection results.

[0039] The detection assembly 3 includes a detection unit 31 and a controller 32. The detection unit 31 is arranged inside the detection cavity 21 and is fixedly connected to the detection column 2. The detection unit 31 is used to monitor the gas pressure information in the detection cavity 21 in real time and convert this information into gas pressure signals and input them into the controller 32. The controller 32 is fixedly arranged on the fixing plate 1, and the controller 32 is electrically connected to the detection unit 31. The controller 32 is used to receive and process these gas pressure signals and display them on the display screen of the controller 32.

[0040] A warning light 11 and a buzzer 12 are arranged on the fixing plate 1. The warning light 11 can flash, and the buzzer 12 can emit an alarm sound. The controller 32 is electrically connected to both the warning light 11 and the buzzer 12. The controller 32 is used to control the working states of the warning light 11 and the buzzer 12 according to the gas pressure information in the detection cavity 21.

[0041] When detecting the gas pressure in the detection chamber 21, the detection unit 31 is in the working state, detecting the gas pressure in the detection chamber 21, and inputting the detection result into the controller 32 for display. When the gas pressure in the detection chamber 21 is greater than the preset value, the controller 32 controls the warning light 11 to flash and the buzzer 12 to alarm, reminding the operator to check in time and prevent gas outburst in advance.

[0042] A filter cover 23 is coaxially sleeved on the detection column 2, and the filter cover 23 is located at the opening of the communication hole 22. The filter cover 23 is used to prevent coal cinder and gravel from entering the communication hole 22. On the one hand, it prevents the communication hole 22 from being blocked, and on the other hand, it avoids affecting the detection result of the detection unit 31.

[0043] The hole sealing assembly 4 includes a fixing ring 41, a limiting ring 42, a sliding ring 43, a first spring, a grouting pipe 45 and a slurry return pipe 46. The fixing ring 41 is coaxially and fixedly arranged on the detection column 2, and the outer diameter of the fixing ring 41 is the same as the drilling diameter. The limiting ring 42 is coaxially and fixedly arranged on the detection column 2. The sliding ring 43 is coaxially arranged between the fixing ring 41 and the limiting ring 42, and the outer diameter of the sliding ring 43 is also the same as the drilling diameter. The sliding ring 43 is slidably connected with the detection column 2, and the sliding axis is arranged along the length direction of the detection column 2. Both ends of the first spring are fixedly connected with the limiting ring 42 and the sliding ring 43 respectively.

[0044] One end of the grouting pipe 45 penetrates through the fixing plate 1, and the other end is located inside the detection column 2, and is communicated with four branch pipes. The four branch pipes are uniformly arranged along the circumferential direction of the detection column 2, and the four branch pipes are all communicated between the fixing ring 41 and the sliding ring 43. A grouting pump is fixedly installed on the grouting pipe 45, and the grouting pump is used to convey the slurry through the grouting pipe 45 and the branch pipes to the space between the fixing ring 41 and the sliding ring 43. One end of the slurry return pipe 46 is fixedly penetrated through the fixing plate 1, and the other end is penetrated through the fixing ring 41 and is communicated with the space between the fixing ring 41 and the sliding ring 43. An overflow valve is fixedly installed on the slurry return pipe 46, and the starting pressure of the overflow valve is greater than the elastic force of the first spring.

[0045] When sealing the borehole, the operator connects the grouting pipe 45 to the storage tank containing the sealing grout. Under the action of the grouting pump, the sealing grout is transported through the grouting pipe 45 and the branch pipe to the cavity composed of the fixed ring 41, the sliding ring 43, the detection injection and the rock wall 6. As the grout is injected, the cavity composed of the fixed ring 41, the sliding ring 43, the detection injection and the rock wall 6 is gradually filled. Since the starting pressure of the overflow valve is greater than the elastic force of the first spring, the subsequent injected grout pushes the sliding ring 43 to compress the first spring and slide towards the direction close to the limit ring 42 until the first spring is compressed to the minimum length. At this time, the grouting and sealing of the borehole is completed. If the grouting pump continues to work, the excess grout will flow out through the overflow valve in the return grout pipe 46. After the operator observes that there is grout flowing out in the return grout pipe 46, the grouting pump can be turned off. After standing for a certain period of time, the grout solidifies, and the grouting and sealing of the borehole is completed.

[0046] The drainage assembly 5 includes a drainage pipe 51, a second spring 52 and a floating block 53. One end of the drainage pipe 51 is fixedly penetrated through the fixing plate 1, and the other end is penetrated through the fixed ring 41 and the sliding ring 43 and is internally connected to the detection space 62. The drainage pipe 51 is fixedly connected to the fixed ring 41 and slidably connected to the sliding ring 43. One end of the second spring 52 is fixedly connected to the detection column 2. The second spring 52 should use a spring with a smaller elastic force. The floating block 53 is fixedly connected to the second spring 52, and the floating block 53 is located at the opening of the drainage pipe 51.

[0047] When there is no water in the detection space 62, under the action of the second spring 52, the floating block 53 abuts against the opening of the drainage pipe 51 to block the drainage pipe 51, and the gas in the detection space 62 will not be discharged through the drainage pipe. When the water between the coal seams 61 penetrates into the detection space 62, under the buoyancy of the water, the floating block 53 floats upward against the elastic force of the second spring 52 to connect the drainage pipe 51, and the water in the detection space 62 is discharged from the drainage pipe 51. After the discharge, under the action of the second spring 52, the floating block 53 blocks the drainage pipe 51 again.

[0048] It should be noted that this embodiment is applicable to the case where the drilling direction is inclined upward or vertically upward. When the drilling direction is inclined downward or vertically downward, the positions of the drainage pipe 51, the floating block 53 and the second spring 52 need to be adjusted to ensure that the opening of the drainage pipe 51 is upward and the floating block 53 is located above the opening of the drainage pipe 51.

[0049] The implementation principle of a gas pressure detector in an embodiment of the present application is as follows:

[0050] When detecting the gas pressure inside the coal seam 61, the operator first uses the drilling device to drill a hole in the rock wall 6, and uses the threaded hole on the fixing plate 1 to fix the fixing plate 1 at the opening of the drill hole through bolts to complete the fixation of the fixing plate 1.

[0051] The operator connects the grouting pipe 45 with the storage tank containing the hole-sealing slurry. Under the action of the grouting pump, the hole-sealing slurry is transported through the grouting pipe 45 and the branch pipe to the cavity composed of the fixed ring 41, the sliding ring 43, the detection injection, and the rock wall 6. As the slurry is injected, the cavity composed of the fixed ring 41, the sliding ring 43, the detection injection, and the rock wall 6 is gradually filled. Since the starting pressure of the overflow valve is greater than the elastic force of the first spring, the subsequently injected slurry pushes the sliding ring 43 to compress the first spring and slide in the direction close to the limit ring 42 until the first spring is compressed to the minimum length. At this time, the grouting hole-sealing is completed. If the grouting pump continues to work, the excess slurry will flow out through the overflow valve in the return slurry pipe 46. After the operator observes that there is slurry flowing out in the return slurry pipe 46, the grouting pump can be turned off. After standing for a certain period of time, the slurry solidifies, and the grouting hole-sealing is completed.

[0052] After the hole-sealing is completed, the detection unit 31 is started to detect the gas pressure in the detection chamber 21, and the detection result is input into the controller 32 for display. When the gas pressure in the detection chamber 21 is greater than the preset value, the controller 32 controls the warning light 11 to flash and the buzzer 12 to alarm, reminding the operator to check in time and prevent gas outburst in advance.

[0053] When the water between the coal seams 61 penetrates into the detection space 62, under the buoyancy of the water, the floating block 53 floats upward against the elastic force of the second spring 52, connecting the drain pipe 51. The water in the detection space 62 is discharged from the drain pipe 51. After the discharge, under the action of the second spring 52, the floating block 53 blocks the drain pipe 51 again.

[0054] The above are all the preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A gas pressure detector, characterized in that: It includes a fixing plate (1), a detection column (2), a hole-sealing component (4), a detection component (3) and a drainage component (5); the fixing plate (1) is fixedly arranged on the drill hole; the detection column (2) is fixedly arranged on the fixing plate (1); a detection cavity (21) is formed inside the detection column (2); a communication hole (22) is formed on the detection column (2), and the communication hole (22) is internally communicated with the detection cavity (21); the hole-sealing component (4) is arranged on the fixing plate (1) and is used for grouting and sealing the drill hole; the detection component (3) is arranged on the fixing plate (1) and is used for detecting the gas pressure inside the detection cavity (21); the drainage component (5) is arranged on the fixing plate (1) and is used for draining the water inside the detection space (62).

2. The gas pressure detector according to claim 1, wherein: The hole-sealing component (4) includes a fixing ring (41), a limiting ring (42), a sliding ring (43), a first spring and a grouting pipe (45); the fixing ring (41) is fixedly arranged on the detection column (2); the limiting ring (42) is fixedly arranged on the detection column (2); the sliding ring (43) is arranged between the fixing ring (41) and the limiting ring (42), and the sliding ring (43) is slidably connected with the detection column (2); two ends of the first spring are respectively fixedly connected with the limiting ring (42) and the sliding ring (43); the grouting pipe (45) is arranged on the fixing plate (1), and a grouting pump is installed at one end of the grouting pipe (45), and the grouting pump is used for conveying the slurry to between the fixing ring (41) and the sliding ring (43).

3. The gas pressure detector according to claim 2, wherein: The drainage component (5) includes a drain pipe (51), the drain pipe (51) is fixedly penetrated through the fixing plate (1), and one end of the drain pipe (51) is internally communicated with the detection space (62), and the communication part is located at the bottom of the detection space (62).

4. The gas pressure detector according to claim 3, wherein: The drainage component (5) further includes a second spring (52) and a floating block (53); one end of the second spring (52) is fixedly connected with the detection column (2), the floating block (53) is fixedly connected with the second spring (52), and the floating block (53) is located at the opening of the drain pipe (51).

5. The gas pressure detector according to claim 2, wherein: The hole-sealing component (4) further includes a slurry return pipe (46), the slurry return pipe (46) is fixedly penetrated through the fixing plate (1), and one end of the slurry return pipe (46) is communicated with the space between the fixing ring (41) and the sliding ring (43); an overflow valve is installed on the slurry return pipe (46).

6. The gas pressure detector according to claim 1, wherein: The detection component (3) includes a detection unit (31) and a controller (32); the detection unit (31) is fixedly arranged inside the detection cavity (21), the detection unit (31) is used for detecting the gas pressure information inside the detection cavity (21) and converting it into a gas pressure signal and inputting it into the controller (32); the controller (32) is electrically connected with the detection unit (31), and the controller (32) is used for receiving the gas pressure signal transmitted by the detection unit (31) and displaying it.

7. The gas pressure detector according to claim 6, wherein: A warning light (11) and a buzzer (12) are provided on the fixed plate (1); both the warning light (11) and the buzzer (12) are electrically connected to the controller (32), and the controller (32) controls the working states of the warning light (11) and the buzzer (12) according to the gas pressure information in the detection chamber (21).

8. The gas pressure detector according to claim 1, wherein: A filter cover (23) is fixedly arranged on the detection column (2), and the filter cover (23) is located at the opening of the communication hole (22).

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