CN210370587U - Coal bed gas pressure measuring device - Google Patents
Coal bed gas pressure measuring device Download PDFInfo
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- CN210370587U CN210370587U CN201920924667.9U CN201920924667U CN210370587U CN 210370587 U CN210370587 U CN 210370587U CN 201920924667 U CN201920924667 U CN 201920924667U CN 210370587 U CN210370587 U CN 210370587U
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Abstract
The utility model relates to the technical field of coal mine gas monitoring, and provides a coal bed gas pressure measuring device, which comprises a pressure measuring pipe, a grouting pipe, a first pressure gauge and a grouting pump, wherein the first pressure gauge is arranged at the tail end of the pressure measuring pipe, and the grouting pump is arranged at the tail end of the grouting pipe; the device also comprises a first inflatable capsule, a second inflatable capsule and an air supply device; the first inflatable capsule and the second inflatable capsule are arranged outside the pressure measuring pipe at intervals; the head end of the grouting pipe extends to an empty area between the first inflatable capsule and the second inflatable capsule; the air supply device is respectively communicated with the first inflatable capsule and the second inflatable capsule; the utility model discloses not only be convenient for impel the head end of piezometric tube to the prediction position in the drilling, guaranteed to measure the required hole sealing length of gas pressure, ensured to implement the hole sealing better to drilling moreover and handled to realized the accurate detection to prediction position gas pressure.
Description
Technical Field
The utility model relates to a colliery gas monitoring technology field especially relates to a coal seam gas pressure measurement device.
Background
The gas pressure is an important parameter for marking the flowing characteristic and occurrence state of the coal seam gas. The coal mine safety regulations stipulate that coal seam gas pressure must be measured to prevent outburst accidents. Along with the continuous increase of the coal mining depth, the outburst dynamic disasters of coal and gas are increased, and the measurement of the coal bed gas pressure has important significance for the prevention of the coal and gas dynamic disasters and the development of corresponding disaster prevention and control work. In addition, measurement of coal bed gas pressure is also an important basis for evaluating coal bed gas reserves, gas emission and gas flow.
Currently, the measuring device for coal bed gas pressure includes a pressure measuring pipe, a grouting pipe and a baffle disc placed in a drilled hole of the coal bed to be measured. When pressure testing is carried out, the pressure measuring pipe is connected with the baffle disc, the front end of the pressure measuring pipe extends out of the front side of the baffle disc, the rear end of the pressure measuring pipe and the orifice of the drilled hole are blocked by a wood wedge, so that a closed space for sealing the hole is formed between the baffle disc and the orifice of the drilled hole, and the rear end of the pressure measuring pipe is connected with a pressure gauge; then, pushing the baffle disc to advance to a predicted position in the drill hole through a piezometer tube; one end of a grouting pipe extends into a closed area of a drilled hole, a grouting pump connected with the other end of the grouting pipe is started, cement slurry is injected into the closed area, after the cement slurry is solidified, another closed area is formed in the drilled hole in the front side of a blocking disc, the closed area is a pressure measurement air chamber of the gas pressure of the coal bed to be measured, and the change of the gas pressure in the pressure measurement air chamber can be monitored in real time by observing the pressure value displayed by a pressure gauge at the rear end of the pressure measurement pipe.
However, in actual monitoring, it is found that, because the coal seam is relatively soft, especially, bedding drilling holes of the soft coal seam are not easy to keep complete, and coal slag is easy to collapse and accumulate locally, in the process of pushing the baffle disc, the coal slag in the drilling holes in the front side of the baffle disc can further accumulate to cause drilling hole blockage, which affects the pushing of the whole set of pressure measuring device, and because the drilling hole blockage causes the pressure measuring device to be pushed to not reach a preset position, the hole sealing length can be shortened, thereby affecting the hole sealing quality and the pressure measuring effect.
Disclosure of Invention
Technical problem to be solved
The utility model aims at providing a coal seam gas pressure measuring device for solve current coal seam gas pressure's measuring device and be difficult to impel to preset position, thereby be difficult to ensure the problem of pressure measurement effect.
(II) technical scheme
In order to solve the technical problem, the utility model provides a coal bed gas pressure measuring device, which comprises a pressure measuring pipe, a grouting pipe, a first pressure gauge and a grouting pump, wherein the first pressure gauge is arranged at the tail end of the pressure measuring pipe, and the grouting pump is arranged at the tail end of the grouting pipe;
the device also comprises a first inflatable capsule, a second inflatable capsule and an air supply device;
the outer part of the piezometric tube is connected with the first inflatable capsule and the second inflatable capsule at intervals;
the head end of the grouting pipe extends to an empty area between the first inflatable capsule and the second inflatable capsule;
the gas supply device is respectively communicated with the first inflatable capsule and the second inflatable capsule.
Preferably, in the utility model discloses in the head end of pressure-measuring pipe is connected and is crept into the device, it includes coaxial coupling's hollow hob, floral tube and auger bit in proper order to creep into the device, wherein, hollow hob is kept away from the one end of floral tube is connected the head end of pressure-measuring pipe.
Preferably, in the utility model, the outer side wall of the perforated pipe is wrapped with one layer of filter screen.
Preferably, the utility model discloses in the first mouth of pipe of end-to-end connection three-way pipe of pressure-measuring pipe, the second mouth of pipe installation of three-way pipe first manometer, first ooff valve is installed to the third mouth of pipe of three-way pipe.
Preferably, in the present invention, the first inflatable capsule and the second inflatable capsule are both wrapped outside the piezometer tube; the second inflatable capsule is wrapped on the outer side of the grouting pipe at the same time.
Preferably, the air supply device of the utility model comprises an inflator pump, a first air pipe and a second air pipe;
the inflator pump is communicated with the first inflation capsule through the first air pipe and is communicated with the second inflation capsule through the second air pipe, the first inflation capsule is close to the head end of the pressure measuring pipe, and the second inflation capsule is close to the tail end of the pressure measuring pipe;
the first air pipe penetrates from the tail end of the pressure measuring pipe, penetrates out from the air vent on the pipe wall of the head end of the pressure measuring pipe and is communicated with the first inflatable capsule.
Preferably, in the present invention, the first air pipe is provided with a second switch valve, and the second air pipe is provided with a third switch valve; and a second pressure gauge is respectively arranged on the first air pipe and the second air pipe.
Preferably, the utility model discloses in the slip casting is equipped with fourth ooff valve and third manometer on the pipe.
Preferably, in the utility model discloses in the piezometric tube still is equipped with and is used for assisting its propulsive propelling movement holder.
Preferably, in the present invention, the pushing gripper includes a gripping base, a first operating arm and a second operating arm; the middle part of the clamping seat is provided with a through operating hole, two ends of the operating hole are provided with guide sleeves which are oppositely arranged and coaxial, and the hole wall of the operating hole is provided with a sliding groove which is arranged along the axial direction of the guide sleeve; the first operating arm and the second operating arm respectively comprise operating handles and clamping blocks, the two operating handles are correspondingly inserted into the two guide sleeves one by one, one end of each operating handle close to the middle of the operating hole is connected with the clamping block, and the clamping block is in sliding connection with the sliding groove; the pressure measuring pipe is arranged between the two clamping blocks.
Preferably, the utility model also provides an above-mentioned coal seam gas pressure measurement device's measuring method, include:
s1, constructing a drill hole in the coal seam with the gas pressure being pre-detected;
s2, the pressure measuring pipe connected with the first inflatable capsule and the second inflatable capsule is pushed into the drill hole until the head end of the pressure measuring pipe is pushed to the predicted position in the drill hole;
s3, inflating the first inflatable capsule and the second inflatable capsule through an air supply device until a vacant area between the first inflatable capsule and the second inflatable capsule forms a closed area in the drill hole;
s4, starting a grouting pump, filling cement slurry into the closed area, and waiting for the cement slurry to solidify so that a drilling area where the head end of the pressure measuring pipe is located forms a closed pressure measuring air chamber;
and S5, observing the gas pressure change in the pressure measurement air chamber through a first pressure gauge at the tail end of the pressure measurement pipe.
Preferably, the present invention further comprises, at S4, evacuating the gas in the first and second pneumatic capsules after the cement slurry has set.
(III) technical effects
The utility model provides a coal seam gas pressure measuring device, aerify the capsule through setting up the first capsule and the second of aerifing on the pressure-measuring pipe, when aerifing in the capsule to the first capsule and the second of aerifing, can very conveniently operate the pressure-measuring pipe, so that it impels in the drilling of preliminary examination coal seam gas, and when the head end of pressure-measuring pipe impeld to the prediction position, aerify in the capsule through aerifing capsule and second to the first capsule, can aerify the vacant district between the capsule and form closed region at the first capsule and the second of aerifing, thereby through carrying out the hole sealing processing to this closed region, can form inclosed pressure-measuring air chamber in the drilling region at pressure-measuring pipe head end place, operating personnel can survey the indoor gas pressure change of pressure-measuring through the first manometer of pressure-measuring pipe tail end in real time.
According to the above, the utility model discloses not only be convenient for impel the head end of piezometric tube to the prediction position in the drilling, guaranteed the required hole sealing length of measurement gas pressure, but also ensured to implement the hole sealing better to drilling and handled to realized that this is simple convenient in the operation, ensured the pressure measurement effect to the accurate detection of prediction position gas pressure.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a coal seam gas pressure measuring device shown in embodiment 1 of the present invention;
FIG. 2 is a schematic view of the structure A-A of FIG. 1;
fig. 3 is a partially enlarged structural schematic view of the first air tube and the first inflatable capsule in embodiment 1 of the present invention;
fig. 4 is a schematic cross-sectional view of the pushing gripper according to embodiment 1 of the present invention.
In the figure: 1-pressure measuring pipe, 2-grouting pipe, 3-first pressure gauge, 4-grouting pump, 5-first inflatable capsule, 6-second inflatable capsule, 7-drilling hole, 8-hollow screw rod, 9-floral tube, 10-spiral drill bit, 11-filter screen, 12-three-way tube, 13-first switch valve, 14-inflator pump, 15-first air tube, 16-second air tube, 17-vent hole, 18-second switch valve, 19-third switch valve, 20-second pressure gauge, 21-fourth switch valve, 22-third pressure gauge, 23-clamping seat, 24-guide sleeve, 25-operating hole, 26-chute, 27-operating handle, 28-clamping block and 29-pressure measuring air chamber.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the case of the example 1, the following examples are given,
referring to fig. 1, the embodiment provides a coal seam gas pressure measuring device, which includes a pressure measuring pipe 1, a grouting pipe 2, a first pressure gauge 3 and a grouting pump 4, where the first pressure gauge 3 is installed at the tail end of the pressure measuring pipe 1, and the grouting pump 4 is installed at the tail end of the grouting pipe 2;
also comprises a first inflatable capsule 5, a second inflatable capsule 6 and an air supply device;
the head end of the pressure measuring pipe 1 extends into a drill hole 7 for pre-detecting coal bed gas, first inflatable capsules 5 and second inflatable capsules 6 are arranged outside the pressure measuring pipe 1 at intervals, and the first inflatable capsules 5 and the second inflatable capsules 6 are located in the drill hole 7;
the head end of the grouting pipe 2 extends into the drill hole 7 and is positioned in an empty area between the first inflatable capsule 5 and the second inflatable capsule 6;
the air supply device is respectively communicated with the first inflatable capsule 5 and the second inflatable capsule 6.
As can be seen from the measuring apparatus shown in fig. 1, when measuring the coal bed gas pressure at the predicted position, when the pressure measuring tube 1 connected with the first inflatable capsule 5 and the second inflatable capsule 6 is not inflated into the first inflatable capsule 5 and the second inflatable capsule 6 (the first inflatable capsule 5 and the second inflatable capsule 6 are in a vacuum state), the pressure measuring tube 1 can be operated very conveniently to push the head end of the pressure measuring tube 1 to the predicted position in the borehole 7, so that by ventilating the first inflatable capsule 5 and the second inflatable capsule 6, the borehole 7 at the positions thereof can be well sealed by the first inflatable capsule 5 and the second inflatable capsule 6, respectively, and cement slurry is formed between the vacant areas between the two inflatable capsules, and by injecting cement slurry into the sealed area, hole sealing treatment can be performed on the sealed area, and accordingly, a sealed pressure measuring air chamber 29 is formed in the borehole area where the head end of the pressure measuring tube 1 is located, an operator can observe the gas pressure change in the pressure measuring air chamber 29 in real time through the first pressure gauge 3 at the tail end of the pressure measuring pipe 1.
Furthermore, because the bedding drilling of the soft coal seam is not easy to keep complete and coal cinder collapse accumulation is easy to form locally, in order to ensure that the pressure measuring pipe 1 can better realize propulsion in the drilling hole 7, the head end of the pressure measuring pipe 1 is connected with a drilling device, and the drilling device comprises a hollow screw rod 8, a flower tube 9 and a spiral drill bit 10 which are coaxially connected in sequence;
wherein, one end of the hollow screw rod 8 far away from the floral tube 9 is connected with the head end of the piezometric tube 1, the length of the hollow screw rod 8 is 400mm, the diameter is 50mm, both ends of the hollow screw rod 8 are provided with screw threads, and both ends of the floral tube 9 are provided with screw threads; in addition, the auger bit 10 is a conical structure, the length of the auger bit 10 is 100mm, the maximum diameter is 30mm, and a screw thread is also reserved at the tail end of the auger bit 10, so that the head end of the piezometric tube 1 and the hollow auger stem 8 are connected through the screw thread, and the two ends of the floral tube 9 and the hollow auger stem 8 and the auger bit 10 are connected through the screw thread.
From this, at the propulsion in-process to pressure-measuring pipe 1, conical auger bit 10 can play certain crushing effect to great caving coal cinder to because the rotatory propulsion of hollow hob 8 and auger bit 10, the cinder of jam can be unscrewed through the thread groove of hollow hob 8, and the cinder after the unscrewing can be even spills in the bottom of drilling 7, prevents the secondary and blocks up.
Further, this embodiment parcel has one deck filter screen 11 on the lateral wall of floral tube 9 to through filter screen 11's filtering action, can prevent from the buggy that the coal seam dropped or the pore of flower on the floral tube 9 is blockked up to accumulational buggy in drilling 7, in order to prevent to cause the influence to the detection of the gas atmospheric pressure in the pressure measurement air chamber 29.
Further, in this embodiment, the tail end of the pressure measuring pipe 1 is connected to a first pipe orifice of the three-way pipe 12, a first pressure gauge 3 is installed at a second pipe orifice of the three-way pipe 12, and a first switch valve 13 is installed at a third pipe orifice of the three-way pipe 12.
Specifically, since there may be a phenomenon of water inflow in the borehole 7 of the coal seam construction or there may be residual water in the borehole 7 after the borehole 7 is flushed, the accuracy of the detection result of the gas pressure in the pressure measuring gas chamber 29 can be ensured by switching the first switching valve 13 and removing the water in the borehole 7 by the pressure measuring pipe 1.
Further, in the embodiment, the first inflatable capsule 5 and the second inflatable capsule 6 are both wrapped on the outer side of the piezometer tube 1; the second inflatable bladder 6 is simultaneously wrapped on the outside of the grouting pipe 2.
Specifically, since the first and second inflatable capsules 5 and 6 are usually made of natural rubber materials with good wear resistance and deformation characteristics, when the two inflatable capsules are filled with gas, the two inflatable capsules will expand under the action of air pressure and form a good seal between the edges and the side wall of the borehole 7, so that the pressure measuring tube 1 and the grouting tube 2 are wrapped by the first and second inflatable capsules 5 and 6, and the influence of the pressure measuring tube 1 and the grouting tube 2 on the seal between the two inflatable capsules and the borehole 7 can be effectively prevented.
Further, the air supply device in this embodiment includes an inflator 14, a first air pipe 15, and a second air pipe 16, wherein both the first air pipe 15 and the second air pipe 16 may be PU pipes, and the PU pipes have an outer diameter of 8mm, an inner diameter of 5mm, and a wall thickness of 1.5 mm;
specifically, during actual measurement, the inflator 14 is arranged outside the borehole 7, the inflator 14 is communicated with the first inflation capsule 5 through the first air pipe 15 and is communicated with the second inflation capsule 6 through the second air pipe 16, the first inflation capsule 5 is close to the head end of the pressure measuring pipe 1, and the second inflation capsule 6 is close to the tail end of the pressure measuring pipe 1 and is located at the inlet end of the borehole 7;
the first air pipe 15 penetrates from the tail end of the pressure measuring pipe 1, penetrates out from an air vent 17 on the pipe wall at the head end of the pressure measuring pipe 1 and is communicated with the first inflatable capsule 5, and the first inflatable capsule is shown in figures 2 and 3.
Therefore, when the pressure measuring pipe 1 is pushed in the drill hole 7, the second air pipe 16 cannot be greatly abraded with the ground, and due to the fact that the first air pipe 15 is arranged in the pressure measuring pipe 1, abrasion to the first air pipe 15 in the pushing process is effectively prevented, and the phenomenon of air leakage of the first air pipe 15 and the second air pipe 16 in the air conveying process is effectively prevented.
Furthermore, in order to facilitate the real-time operation of inflating each inflatable capsule and ensure that the two inflatable capsules reach the corresponding sealing air pressure in real time, the first air pipe 15 is provided with a second switch valve 18, and the second air pipe 16 is provided with a third switch valve 19; and a second pressure gauge 20 is installed on each of the first and second air pipes 15 and 16.
Further, in order to control the grouting pump 4 to inject cement slurry into the vacant area between the first inflatable capsule 5 and the second inflatable capsule 6 after inflation is completed in real time and monitor the grouting pressure of the grouting pump 4 in real time, a fourth switch valve 21 and a third pressure gauge 22 are installed on the grouting pipe 4 in the embodiment.
Further, in the present embodiment, the pressure-measuring pipe 1 is further provided with a pushing gripper for assisting the pushing thereof, so that the pressure-measuring pipe 1 can be held by the pushing gripper by manually operating the pushing gripper, to further ensure the smooth pushing of the pressure-measuring pipe 1 into the borehole 7.
Further, referring to fig. 4, the pushing gripper in this embodiment includes a gripper base 23, a first operating arm and a second operating arm; a through rectangular operating hole 25 is formed in the middle of the clamping seat 23, guide sleeves 24 which are oppositely arranged and coaxial are arranged at two ends of the operating hole 25, and sliding grooves 26 which are arranged along the axial direction of the guide sleeves 24 are formed in the hole wall of the operating hole 25; the first operating arm and the second operating arm respectively comprise operating handles 27 and clamping blocks 28, the two operating handles 27 are correspondingly inserted into the two guide sleeves 24 one by one, one end of each operating handle 27 close to the middle part of the operating hole 25 is connected with the clamping block 28, and the clamping block 28 is in sliding connection with the sliding groove 26; the pressure measuring pipe 1 is arranged between the two clamping blocks 28, and when the two clamping blocks 28 clamp the pressure measuring pipe 1, the pressure measuring pipe 1 is perpendicular to the axial direction of the guide sleeve 24.
Specifically, in order to facilitate the loading and unloading and clamping operation of the push clamp, the clamping base 23 is designed to be formed by splicing two half bodies which are symmetrical along the axial direction of the guide sleeve 24, that is, after the first operating arm and the second operating arm are installed on one half body of the clamping base 23, the two half bodies are spliced into a whole, and the opposite surfaces of the corresponding clamping blocks 28 on the first operating arm and the second operating arm are designed to be in a V-shaped or zigzag structure, so that the clamping operation is performed on the pressure measuring pipe 1 which passes through the operating hole 25.
In the case of the example 2, the following examples are given,
the embodiment provides a method for measuring a coal bed gas pressure measuring device based on embodiment 1, and the method includes:
s1, constructing a drill hole 7 with the aperture of 75mm in the coal seam with the pre-detected gas pressure by using a drilling machine;
s2, the pressure measuring pipe 1 connected with the first inflatable capsule 5 and the second inflatable capsule 6 is pushed into the borehole 7 until the head end of the pressure measuring pipe 1 is pushed to a predicted position in the borehole 7, wherein before the pressure measuring pipe 1 is pushed, the first inflatable capsule 5 and the second inflatable capsule 6 need to be vacuumized to reduce the occupied volume during pushing, and during pushing, a drilling device can be installed at the head end of the pressure measuring pipe 1, and when resistance is met during pushing, the pressure measuring pipe 1 can be clamped by a pushing clamp holder, so that the pressure measuring pipe 1 is operated to rotate and push forwards;
s3, inflating the first inflatable capsule 5 and the second inflatable capsule 6 through an air supply device until the first inflatable capsule 5 and the second inflatable capsule 6 reach hole sealing pressure, so that a vacant area between the two inflatable capsules forms a closed area in the drill hole 7;
s4, starting a grouting pump 4, continuously injecting cement slurry into the closed area through a grouting pipe 2, stopping grouting when the grouting pump 4 reaches grouting pressure, uniformly filling the cement slurry into the closed area, solidifying the cement slurry after the cement slurry stays for 24 hours, so that a drilling area where the head end of the pressure measuring pipe 1 is located forms a closed pressure measuring air chamber 29, the length of the pressure measuring air chamber 29 is larger than 1.5m, opening a second switch valve 18 and a third switch valve 19, and exhausting the gas in a first inflatable capsule 5 and a second inflatable capsule 6 to prevent the first inflatable capsule 5 from leaking into the pressure measuring air chamber 29 in the pressure measuring process, thereby affecting the accuracy of pressure measurement;
s5, observing the air pressure change in the pressure measuring air chamber 29 through the first pressure gauge 3 at the tail end of the pressure measuring pipe 1, and stopping observation when the pressure change in the pressure measuring air chamber 29 is less than 0.015MPa within 3 days.
Furthermore, in the embodiment, the pressure measuring pipe 1 is composed of a plurality of sections of quarter galvanized steel pipes, the length of each section of quarter galvanized steel pipe is 2m, screw threads are reserved at two ends of each section of quarter galvanized steel pipe, two adjacent sections of quarter galvanized steel pipes are connected through the screw threads and are further fastened through pipe hoops; the grouting pipe 2 is a six-minute galvanized steel pipe, and the length of the grouting pipe 2 is 1 m.
Further, it should be noted that, in order to ensure a good feeding of the piezometric tube 1, the screwing direction of the threads between two adjacent quarter galvanized steel tubes and the screwing direction of each thread in the drilling device in this embodiment are adapted to the screwing direction of the pushing gripper.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (8)
1. A coal bed gas pressure measuring device comprises a pressure measuring pipe, a grouting pipe, a first pressure gauge and a grouting pump, wherein the first pressure gauge is installed at the tail end of the pressure measuring pipe, and the grouting pump is installed at the tail end of the grouting pipe; it is characterized in that the preparation method is characterized in that,
the device also comprises a first inflatable capsule, a second inflatable capsule and an air supply device;
the outer part of the piezometric tube is connected with the first inflatable capsule and the second inflatable capsule at intervals;
the head end of the grouting pipe extends to an empty area between the first inflatable capsule and the second inflatable capsule;
the gas supply device is respectively communicated with the first inflatable capsule and the second inflatable capsule.
2. The coal bed gas pressure measuring device according to claim 1, wherein the head end of the piezometer tube is connected with a drilling device, and the drilling device comprises a hollow screw rod, a perforated pipe and a spiral drill bit which are coaxially connected in sequence; one end of the hollow screw rod, which is far away from the floral tube, is connected with the head end of the piezometric tube; the outer side wall of the perforated pipe is wrapped with a layer of filter screen.
3. The coal bed gas pressure measuring device according to claim 1, wherein the tail end of the pressure measuring pipe is connected with a first pipe orifice of a three-way pipe, a second pipe orifice of the three-way pipe is provided with the first pressure gauge, and a third pipe orifice of the three-way pipe is provided with a first switch valve.
4. The coal bed gas pressure measuring device according to claim 1, wherein the first inflation capsule and the second inflation capsule are wrapped outside the piezometer tube; the second inflatable capsule is wrapped on the outer side of the grouting pipe at the same time.
5. The coal seam gas pressure measuring apparatus according to claim 1,
the gas supply device comprises an inflator pump, a first gas pipe and a second gas pipe;
the inflator pump is communicated with the first inflation capsule through the first air pipe and is communicated with the second inflation capsule through the second air pipe, the first inflation capsule is close to the head end of the pressure measuring pipe, and the second inflation capsule is close to the tail end of the pressure measuring pipe;
the first air pipe penetrates from the tail end of the pressure measuring pipe, penetrates out from the air vent on the pipe wall of the head end of the pressure measuring pipe and is communicated with the first inflatable capsule.
6. The coal bed gas pressure measuring device according to claim 5, wherein a second on-off valve is installed on the first gas pipe, and a third on-off valve is installed on the second gas pipe; the first air pipe and the second air pipe are respectively provided with a second pressure gauge; and a fourth switch valve and a third pressure gauge are mounted on the grouting pipe.
7. The coal seam gas pressure measuring device of claim 1, wherein the pressure measuring pipe is further configured with a push gripper for assisting its propulsion.
8. The coal seam gas pressure measuring device of claim 7, wherein the push gripper comprises a gripper seat, a first operating arm and a second operating arm; the middle part of the clamping seat is provided with a through operating hole, two ends of the operating hole are provided with guide sleeves which are oppositely arranged and coaxial, and the hole wall of the operating hole is provided with a sliding groove which is arranged along the axial direction of the guide sleeve; the first operating arm and the second operating arm respectively comprise operating handles and clamping blocks, the two operating handles are correspondingly inserted into the two guide sleeves one by one, one end of each operating handle close to the middle of the operating hole is connected with the clamping block, and the clamping block is in sliding connection with the sliding groove; the pressure measuring pipe is arranged between the two clamping blocks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920924667.9U CN210370587U (en) | 2019-06-19 | 2019-06-19 | Coal bed gas pressure measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920924667.9U CN210370587U (en) | 2019-06-19 | 2019-06-19 | Coal bed gas pressure measuring device |
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| CN210370587U true CN210370587U (en) | 2020-04-21 |
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| CN201920924667.9U Expired - Fee Related CN210370587U (en) | 2019-06-19 | 2019-06-19 | Coal bed gas pressure measuring device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219616A (en) * | 2019-06-19 | 2019-09-10 | 天地科技股份有限公司 | A kind of coal-bed gas pressure measuring device and its measurement method |
| CN112483181A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | Method for judging impact risk of three-soft coal seam by window intervention method |
| CN112525731A (en) * | 2020-12-18 | 2021-03-19 | 山东科技大学 | Method for judging impact risk of three hard coal seams by window intervention method |
-
2019
- 2019-06-19 CN CN201920924667.9U patent/CN210370587U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219616A (en) * | 2019-06-19 | 2019-09-10 | 天地科技股份有限公司 | A kind of coal-bed gas pressure measuring device and its measurement method |
| CN112483181A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | Method for judging impact risk of three-soft coal seam by window intervention method |
| CN112525731A (en) * | 2020-12-18 | 2021-03-19 | 山东科技大学 | Method for judging impact risk of three hard coal seams by window intervention method |
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