CN216841782U - Coal seam drilling gas leakage quantity testing device - Google Patents
Coal seam drilling gas leakage quantity testing device Download PDFInfo
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- CN216841782U CN216841782U CN202220208406.9U CN202220208406U CN216841782U CN 216841782 U CN216841782 U CN 216841782U CN 202220208406 U CN202220208406 U CN 202220208406U CN 216841782 U CN216841782 U CN 216841782U
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- coal seam
- gas leakage
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- 239000003245 coal Substances 0.000 title claims abstract description 43
- 238000005553 drilling Methods 0.000 title claims abstract description 39
- 238000012360 testing method Methods 0.000 title claims abstract description 31
- 239000002775 capsule Substances 0.000 claims abstract description 68
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 238000002347 injection Methods 0.000 claims abstract description 25
- 239000007924 injection Substances 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000012530 fluid Substances 0.000 claims abstract description 11
- 238000005253 cladding Methods 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 25
- 238000001514 detection method Methods 0.000 claims description 24
- 230000007246 mechanism Effects 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 description 10
- 238000000605 extraction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000006049 ring expansion reaction Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
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Abstract
The utility model relates to a coal seam drilling gas leakage quantity testing arrangement, including the booster pump, the connecting pipe, the inflation capsule, the connecting rod, annotate the liquid mouth, the shunt tubes, the inflation capsule cladding is outside the connecting rod, establish ties each other through the connecting pipe between two adjacent inflation capsules, in addition through connecting pipe and shunt tubes intercommunication and constitute injection inflation pipeline, the connecting rod passes through connecting pipe and shunt tubes intercommunication and constitutes water injection seepage flow pipeline, the leakage fluid dram is established to the connecting rod lateral wall between two adjacent inflation capsules, the shunt tubes passes through switching valve and booster pump intercommunication. This is novel through the drilling rod of connecting unit length, gets into the coal seam gas drainage drilling of the different degree of depth and carries out the subregion test to utilize the leakage quantity of the different degree of depth of survey drilling, the accurate release bandwidth width around the test point of being convenient for is confirmed, and the testing result is true and reliable.
Description
Technical Field
The utility model relates to a coal seam drilling gas leakage quantity testing arrangement belongs to colliery downhole gas and prevents and treat technical field.
Background
In the process of tunneling a working face under a coal mine, disaster risks such as coal and gas outburst exist, and therefore coal seam gas needs to be extracted effectively. Stress is distributed in a belt shape in the coal seam stoping process and is respectively a pressure relief area, a stress concentration area and an original rock stress area, the stress of the pressure relief area and the gas content pressure are released, the length of a hole sealing section of a gas extraction drilling hole is required to exceed the width of the pressure relief belt, and therefore accurate measurement of the width of the pressure relief belt has important significance for effective gas extraction.
The traditional pressure relief zone measuring method is mainly determined according to drilling parameter indexes, such as:
(1) collecting drill cuttings around a drill hole, measuring parameters such as the drill cuttings quantity and the drill cuttings gas desorption index, and analyzing to determine the width of a pressure relief zone of the drill hole; but the fixed-point sampling at the deep part of the drilling hole is difficult to realize, so the measuring result of the width of the pressure relief strip is not accurate.
(2) Determining the width of a pressure relief zone according to the initial velocity of the gas emission of the drilled hole, wherein the permeability of the coal bed in the pressure relief zone is high, the permeability of the coal bed in a stress concentration zone is reduced to be lower than that of the coal bed in an original rock stress zone, and the permeability of the coal bed is recovered to be the permeability of the coal bed in the original rock stress zone along with the increase of the depth of the drilled hole; however, the gas emission amount of the initial drilling is mainly from a drilling broken area, the initial gas emission speed of a stress concentration area is high, and the distance between a drilling pressure relief area and the stress concentration area is difficult to judge.
(3) According to the gas extraction parameters, drill holes with different hole sealing section depths are influenced by through cracks with different degrees, extraction negative pressure and extraction concentration are different, and the measurement process is greatly influenced by various factors.
According to the coal bed gas seepage theory, a 'drilling gas leakage loss method' is provided for measuring the width of a pressure relief zone of a coal bed; but the migration and adsorption capacity of gas in pores and cracks of the coal bed is strong, the flow data change in the test process is sensitive, and the surface tension of liquid water and coal bodies can relatively accurately represent the gas leakage amount in the cracks of the drill hole. Therefore, a coal seam drilling gas leakage quantity testing device and a pressure relief belt width measuring method are provided according to a coal laminar flow-solid coupling model so as to meet the actual use requirement.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects in the prior art, the utility model provides a coal seam drilling gas leakage quantity testing device, which is characterized in that a drill rod with unit length is connected, coal seam gas extraction drill holes with different depths are entered for subsection testing, and the result is measured according to the influences of the coal seam stress, the gas pressure and the coal seam fracture development conditions of different pressure relief belts of the drill holes on the gas leakage quantity of the drill holes; simultaneously this novel dismouting combination of being convenient for carries out in colliery limited space in the pit, also makes things convenient for constructor to carry, easy operation, sealed effect is better.
In order to achieve the above purpose, the present invention is realized by the following technical solution:
a coal seam drilling gas leakage quantity testing device comprises a booster pump, connecting pipes, expansion capsules, connecting rods, a switch valve, a check valve, a flow pressure gauge, a liquid injection port, flow dividing pipes and a detection circuit, wherein at least two expansion capsules are of cylindrical cavity structures with annular cross sections, are coated outside the connecting rods, are coaxially distributed with the connecting rods and are connected with the connecting rods through connecting mechanisms, two adjacent expansion capsules are mutually connected in series through the connecting pipes and are communicated with the flow dividing pipes through the connecting pipes to form injection expansion pipelines, the expansion capsules are communicated with the connecting pipes through the liquid injection port, the connecting rods are of hollow tubular structures, the connecting rods are mutually communicated through connecting pipe heads and are communicated with the flow dividing pipes through the connecting pipes to form water injection seepage pipelines, the connecting rods are connected with the expansion capsules in parallel, and at least one liquid discharge port is arranged on the side wall of the connecting rod between the two adjacent expansion capsules, the shunt tubes are respectively communicated with the connecting pipes connected with the expansion capsules and the connecting rods through one-way valves, and are communicated with the booster pump through switch valves, a flow pressure gauge is arranged between the one-way valves and the connecting pipes, and the detection circuit is connected with the booster pump through a rack and is respectively electrically connected with the booster pump, the switch valves, the one-way valves, the flow pressure gauge and the connecting mechanism.
Furthermore, the connecting mechanism comprises two sealing sleeves, at least three supporting grooves, adjusting springs and pressure sensors, the two sealing sleeves are coaxially distributed with the connecting rod, are coated outside the connecting rod and are symmetrically distributed on two sides of the expansion capsule, the axial cross section of each supporting groove is in a U-shaped groove-shaped structure, the front end surface and the rear end surface of each supporting groove are in sliding connection with the rear end surface of the sealing sleeve, the lower end surface of each supporting groove is connected with the outer surface of the connecting rod through at least two adjusting springs, the inner surface of each expansion capsule is embedded in the groove body of the supporting groove, the side surface of each expansion capsule is abutted against and in sliding connection with the rear end of the sealing sleeve, the axes of the adjusting springs are vertically distributed with the axis of the connecting rod and are uniformly distributed along the axial direction of the supporting groove, the adjusting springs are connected with the lower end surface of the supporting groove through the pressure sensors, and the pressure sensors are mutually connected in parallel, and is electrically connected with the detection circuit through a lead.
Further, the seal cover includes metal clamp, elastic sealing ring includes sealed dish and seal cover, wherein the seal cover is connected and coaxial distribution with sealed dish rear end face, the seal cover is the cylinder tubular structure, the cladding outside the connecting rod and with the coaxial distribution of connecting rod, and the seal cover external diameter is not more than 1/2 of sealed dish diameter, at least one of metal clamp, the cladding outside the seal cover and with the coaxial distribution of seal cover.
Furthermore, in the bracket, two adjacent brackets are connected with each other through a flexible connecting band, and the bracket and the flexible connecting band jointly form a hollow cylindrical cavity structure coaxially distributed with the connecting rod.
Furthermore, annotate the liquid mouth and include honeycomb duct, pressure strain gauge, sealing ring, leakage fluid dram, air-vent valve, the honeycomb duct inlays in the expansion capsule and with expansion capsule axis parallel distribution, the honeycomb duct both ends are located outside the expansion capsule respectively to pass through the connector head with the connecting pipe and communicate, the honeycomb duct both ends are connected through sealing ring expansion capsule lateral wall in addition respectively, establish a thru hole on the pipe wall that the honeycomb duct is located the expansion capsule, the thru hole is connected with the air-vent valve to communicate with the leakage fluid dram through the air-vent valve, at least two pressure strain gauges are located the expansion capsule, along honeycomb duct axis direction equipartition and with honeycomb duct surface connection, pressure strain gauge and air-vent valve all with detection circuitry electrical connection.
Further, the connecting rod is including bearing pipe, ferrule, equalizer valve and sealed end cap, it is the hollow tubular structure of rectangle for axial cross-section to bear the pipe, bear the pipe at least two, connect and coaxial distribution through the ferrule between two adjacent bearing pipes, bear the weight of the pipe tube head that lies in foremost in the pipe and be connected with sealed end cap, the bearing pipe tube head that lies in the rearmost end is connected with the connecting pipe and is connected with the shunt tubes through the connecting pipe, equalizer valve quantity is unanimous with leakage fluid dram quantity, and every leakage fluid dram all with an equalizer valve intercommunication, the equalizer valve in addition with detection circuitry electrical connection.
Furthermore, the detection circuit is a circuit system based on any one of an industrial single chip microcomputer and a programmable controller.
Furthermore, the frame is of a frame structure with a rectangular cross section, the upper end face of the frame is respectively connected with the detection circuit and the booster pump through sliding grooves, a liquid collecting groove is additionally arranged in the frame corresponding to the booster pump, is of a U-shaped groove-shaped cross section structure, is embedded in the frame and is positioned under the booster pump.
The utility model discloses a connecting the drilling rod of unit length, getting into the coal seam gas drainage drilling of the different degree of depth and carrying out the subregion test, and utilize the leakage amount of the different degree of depth of survey drilling, be convenient for accurately confirm the release area width around the test point, and on the theoretical basis of coal seam fluid seepage, according to the coal seam stress of the different release areas of drilling, gas pressure and the influence of coal seam crack development to drilling gas leakage amount survey the result, the measuring method is simple, the change of liquid infiltration flow and pressure is easy directly perceived the expression, the measuring result is true and reliable; simultaneously this novel dismouting combination of being convenient for carries out in colliery limited space in the pit, also makes things convenient for constructor to carry, easy operation, sealed effect is better.
Drawings
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments;
FIG. 1 is a structural diagram of the novel structure;
FIG. 2 is a schematic view showing a connection structure between the expansion capsule and the connection mechanism and between the expansion capsule and the injection port;
FIG. 3 is a schematic diagram of a side view structural distribution of brackets in the linking mechanism;
FIG. 4 is a schematic view of a connecting rod structure;
FIG. 5 is a schematic view of a connection structure between the frame and the booster pump and the detection circuit.
Detailed Description
In order to make the technical means, creation features, achievement purposes and effects of the novel implementation easy to construct, the novel implementation is further explained below by combining with specific embodiments.
As shown in figures 1-5, a coal seam drilling gas leakage amount testing device comprises a booster pump 1, a connecting pipe 2, expansion capsules 3, a connecting rod 4, a switch valve 5, a one-way valve 6, a flow pressure gauge 7, a liquid injection port 8, a shunt pipe 9 and a detection circuit 10, wherein at least two expansion capsules 3 are in a cylindrical cavity structure with a ring-shaped cross section, the expansion capsules 3 are coated outside the connecting rod 4 and are coaxially distributed with the connecting rod 4 and are connected with the connecting rod 1 through a connecting mechanism 11, two adjacent expansion capsules 3 are mutually connected in series through the connecting pipe 2 and are communicated with the shunt pipe 2 through the connecting pipe 2 to form an injection expansion pipeline, the expansion capsules 3 are communicated with the connecting pipe 2 through the liquid injection port 8, the connecting rod 4 is in a hollow tubular structure, the connecting rods 4 are mutually communicated through a connecting pipe head 13 and are communicated with the shunt pipe 9 through the connecting pipe 2 to form a water injection seepage pipeline, the connecting rod 4 is connected with the expansion capsules 3 in parallel, at least one liquid outlet 12 is arranged on the side wall of the connecting rod 4 between two adjacent expansion capsules 3, the shunt tubes 9 are respectively communicated with the expansion capsules 3 and the connecting tubes 2 connected with the connecting rod 4 through the one-way valves 6, and are also communicated with the booster pump 1 through the switch valves 5, a flow pressure gauge 7 is arranged between the one-way valves 6 and the connecting tubes, and the detection circuit 10 is connected with the booster pump 1 through a rack 14 and is respectively electrically connected with the booster pump 1, the switch valves 5, the one-way valves 6, the flow pressure gauge 7 and the connecting mechanism 11.
It should be noted that the connecting mechanism 11 includes two sealing sleeves 111, two bracket 112, at least three adjusting springs 113, and two pressure sensors 114, the two sealing sleeves 111 are distributed coaxially with the connecting rod 4, cover the connecting rod 4 and symmetrically distribute on two sides of the expansion capsule 3, the bracket 112 is distributed uniformly around the axis of the connecting rod 4 and parallel to the axis of the connecting rod 4, the axial cross section of the bracket 112 is a "u" shaped groove-shaped structure, the front end face and the rear end face thereof are connected with the rear end face of the sealing sleeve 111 in a sliding manner, the lower end face is connected with the outer surface of the connecting rod 4 through at least two adjusting springs 113, the inner surface of the expansion capsule 3 is embedded in the groove body of the bracket 112, the side surface is abutted against and connected with the rear end of the sealing sleeve 111 in a sliding manner, the axes of the adjusting springs 113 are distributed vertically to the axis of the connecting rod 4 and are distributed uniformly along the axis direction of the bracket 112, and the adjusting springs 113 are connected with the lower end face of the bracket 112 through the pressure sensors 114, the pressure sensors 114 are connected in parallel with each other and electrically connected to the detection circuit 10 through wires.
Wherein, the seal cover 111 includes metal clamp 1111, elastic sealing ring 1112 includes sealed dish 11121 and seal cover 11122, wherein seal cover 11122 is connected and coaxial distribution with sealed dish 11121 rear end face, seal cover 11122 is the cylinder tubular structure, the cladding outside connecting rod 4 and with the coaxial distribution of connecting rod 4, and seal cover 11122 external diameter is not more than the 1/2 of sealed dish 11121 diameter, metal clamp 1111 at least one, the cladding outside seal cover 11122 and with the coaxial distribution of seal cover 11122.
Further optimize, the constant head tank 11123 with the coaxial distribution of seal cover 11122 is established to the seal cover 11122 surface that metal clamp 1111 corresponds, and metal clamp 1111 inlays in constant head tank 11123.
Meanwhile, in the bracket 112, two adjacent brackets 112 are connected with each other through a flexible connecting band 115, the bracket 112 and the flexible connecting band 115 jointly form a hollow cylindrical cavity structure coaxially distributed with the connecting rod 4, and a plurality of through holes 116 with axes vertically distributed with the axes of the connecting rod 4 are uniformly distributed on the bottom of the bracket 112.
In this embodiment, the liquid injection port 8 includes a flow guide tube 81, pressure strain gauges 82, a sealing ring 83, a liquid discharge nozzle 84, and a pressure regulating valve 85, the flow guide tube 81 is embedded in the expansion capsule 3 and is distributed parallel to the axis of the expansion capsule 3, two ends of the flow guide tube 81 are respectively located outside the expansion capsule 3 and are communicated with the connecting tube 2 through the connector head 14, two ends of the flow guide tube 81 are respectively connected to the side wall of the expansion capsule 3 through the sealing ring 83, a through hole 86 is formed in the wall of the flow guide tube 81 located in the expansion capsule 3, the through hole 86 is connected to the pressure regulating valve 85 and is communicated with the liquid discharge nozzle 84 through the pressure regulating valve 85, at least two pressure strain gauges 82 are located in the expansion capsule 3, are uniformly distributed along the axis direction of the flow guide tube 81 and are connected to the outer surface of the flow guide tube 81, and the pressure strain gauges 82 and the pressure regulating valve 85 are electrically connected to the detection circuit 10.
In addition, connecting rod 4 includes carrier tube 41, ferrule 42, equalizing valve 43 and sealed end cap 44, carrier tube 41 is the hollow tubular structure of rectangle for axial cross-section, carrier tube 41 is at least two, connects and coaxial distribution through ferrule 42 between two adjacent carrier tubes 41, the carrier tube 41 tube head that lies in the foremost in carrier tube 41 is connected with sealed end cap 44, and the carrier tube 41 tube head that lies in the rearmost is connected with connecting pipe 2 and is connected with shunt tubes 9 through connecting pipe 2, equalizing valve 43 quantity is unanimous with leakage fluid dram 12 quantity, and every leakage fluid dram 12 all communicates with an equalizing valve 43, equalizing valve 43 in addition with detection circuitry 10 electrical connection.
In this embodiment, the detection circuit 10 is a circuit system based on any one of an industrial single chip microcomputer and a programmable controller.
In this embodiment, the frame 14 has a frame structure with a rectangular cross section, the upper end surface of the frame is connected to the detection circuit 10 and the booster pump 1 through the sliding grooves 141, the liquid collecting tank 142 is further disposed in the frame 14 corresponding to the booster pump 1, and the liquid collecting tank 142 has a U-shaped groove-shaped cross section and is embedded in the frame 14 and located right below the booster pump 1.
For better explanation and introduction of the technical solution of the present invention, the following description will be made with reference to the specific embodiments:
at first according to the use needs, assemble this neotype booster pump, connecting pipe, inflation capsule, connecting rod, switch valve, check valve, flow pressure meter, notes liquid mouth, shunt tubes and detection circuitry of constitution, wherein in the equipment process, the interval is 1m between two adjacent inflation capsules to connect through connecting pipe, connecting rod, when concrete detection operation, detect the operation according to following step:
firstly, connecting a one-way valve, a flow pressure gauge and a connecting pipe with the water injection port end of an expansion capsule, wherein the expansion capsules are also connected by the connecting pipe; then connecting the one-way valve, the flow pressure gauge, the connecting rod and the expansion capsule; finally, connecting a connecting pipe of the water injection expansion pipeline and a connecting rod of the water injection seepage pipeline with a switch valve of the booster pump, and finishing the assembly of the gas leakage quantity testing device;
secondly, supporting the connecting rod and the expansion capsule to be delivered to the position of the hole opening of the drill hole, wherein the connecting rod connected with the inlet end of the expansion capsule ensures that the width of the pressure relief belt is tested from 6m of the hole opening of the drill hole;
and thirdly, firstly, opening a one-way valve of a water injection expansion pipeline and adjusting a booster pump, improving water pressure and injecting the expansion capsule into the water injection pipeline through a connecting pipe, fully expanding the volume of the capsule to realize the effect of sealing the drilled hole, observing the water volumes in the expansion capsule and the water injection pipeline through a flow pressure gauge, and calculating the expansion degree of the capsule in the drilled hole. For example, when the flow gauge pressure shows 0.3MPa, the expanded capsule diameter increases from 70mm to 115mm, enabling sufficient expansion and bore sealing;
and fourthly, providing seepage pressure and flow for water injection of the drilling channel by adjusting the booster pump, reading flow readings on the multifunctional flow pressure gauge under the condition of constant seepage pressure, and determining the strength of pressure relief capacity according to the change degree of the front pressure value and the rear pressure value. For example, when the pressure of the multifunctional flow pressure gauge shows 0.5MPa, the larger the pressure value of the seepage pipeline is reduced, the stronger the pressure relief capacity is;
and fifthly, opening a one-way valve of a water injection expansion pipeline outside the drill hole and a switch valve of the booster pump to release pressure of the expansion capsule. Adding a connecting rod of 1m at the hole opening of the drill hole for the first time according to the second step, ensuring that the in-situ drill hole continues to push 1m to the deep part of the drill hole, continuing to carry out engineering and recording data such as pressure values and flow values of the gas leakage of the drill hole until the pressure values and the flow values of the gas leakage are not changed obviously, and recording the relative pushing depth of the connecting rod, namely the width of the pressure relief band;
the utility model discloses a connection unit length's drilling rod gets into the coal seam gas drainage drilling of the different degree of depth and carries out the subregion section test, increases the connecting rod of 1m at every turn and progressively tests the leakage loss of unit length, utilizes the utility model discloses a leakage loss of the different degree of depth of testing arrangement survey drilling, the accurate release bandwidth width around the test point of being convenient for.
The utility model discloses a single section connecting rod of testing arrangement adopts modes such as the fixed combination of instruments such as female connection mode, flow manometer and check valve adoption female joint adoption thread connection mode, flow pressure meter, is convenient for carry out the dismouting combination in colliery underground finite space, also makes things convenient for constructor to carry, easy operation, sealed effect better.
The utility model discloses utilize drilling subregion gas leakage test result to confirm release belt width, on coal seam fluid seepage theoretical basis, according to the different coal seam stress, gas pressure and the coal seam crack development condition of pressure area of unloading of drilling to survey out the result to the influence of drilling gas leakage, the survey method is simple, the change of liquid infiltration flow and pressure is directly perceived the sign easily and is come out, the survey result is true and reliable.
The foregoing shows and describes the basic principles and principal features of the present novel form, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, but rather that various changes and modifications may be made without departing from the spirit and scope of the invention, which is intended to be covered by the appended claims. The scope of the present novel claims is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a coal seam drilling gas leakage quantity testing arrangement which characterized in that: the coal seam drilling gas leakage quantity testing device comprises a booster pump, at least two expansion capsules, an expansion capsule, a connecting rod, a switch valve, a check valve, a flow pressure gauge, a liquid injection port, a shunt pipe and a detection circuit, wherein the expansion capsules are of a cylindrical cavity structure with an annular cross section, are coated outside the connecting rod, are coaxially distributed with the connecting rod and are connected with the connecting rod through a connecting mechanism, two adjacent expansion capsules are mutually connected in series through the connecting pipe and are communicated with the shunt pipe through the connecting pipe to form an injection expansion pipeline, the expansion capsules are communicated with the connecting pipe through the liquid injection port, the connecting rod is of a hollow tubular structure, the connecting rods are mutually communicated through connecting pipe heads and are communicated with the shunt pipe through the connecting pipe to form a water injection seepage pipeline, the connecting rod is connected with the expansion capsules in parallel, and at least one liquid discharge port is arranged on the side wall of the connecting rod between the two adjacent expansion capsules, the shunt tubes are respectively communicated with the connecting pipes connected with the expansion capsules and the connecting rods through the one-way valves, and are also communicated with the booster pump through the switch valves, a flow pressure meter is arranged between the one-way valves and the connecting pipes, and the detection circuit is connected with the booster pump through the rack and is respectively electrically connected with the booster pump, the switch valves, the one-way valves, the flow pressure meter and the connecting mechanism.
2. The coal seam drilling gas leakage testing device of claim 1, characterized in that: the connecting mechanism comprises two sealing sleeves, support grooves, adjusting springs and pressure sensors, the two sealing sleeves are coaxially distributed with the connecting rod, are coated outside the connecting rod and are symmetrically distributed on two sides of the expansion capsule, at least three support grooves are uniformly distributed around the axis of the connecting rod and are distributed in parallel with the axis of the connecting rod, the axial section of each support groove is in a U-shaped groove-shaped structure, the front end surface and the rear end surface of each support groove are in sliding connection with the rear end surface of the corresponding sealing sleeve, the lower end surface of each support groove is connected with the outer surface of the corresponding connecting rod through at least two adjusting springs, the inner surface of each expansion capsule is embedded in the groove body of the corresponding support groove, the side surface of each expansion capsule is abutted against the rear end of the corresponding sealing sleeve and is in sliding connection with the rear end of the corresponding support groove, the axes of the adjusting springs are vertically distributed with the axis of the corresponding connecting rod and are uniformly distributed along the axis direction of the support grooves, the adjusting springs are connected with the lower end surfaces of the support grooves through the pressure sensors, and the pressure sensors are mutually connected in parallel, and is electrically connected with the detection circuit through a lead.
3. The coal seam drilling gas leakage testing device of claim 2, characterized in that: the seal cover includes metal clamp, elastic sealing ring includes sealed dish and seal cover, wherein the seal cover is connected and coaxial distribution with sealed dish rear end face, the seal cover is the cylinder tubular structure, the cladding outside the connecting rod and with the coaxial distribution of connecting rod, and the seal cover external diameter is not more than 1/2 of sealed dish diameter, at least one of metal clamp, the cladding is outside and with the coaxial distribution of seal cover.
4. The coal seam drilling gas leakage testing device of claim 2, characterized in that: in the bracket, two adjacent brackets are connected with each other through a flexible connecting band, and the bracket and the flexible connecting band jointly form a hollow cylindrical cavity structure which is coaxially distributed with the connecting rod.
5. The coal seam drilling gas leakage testing device of claim 1, characterized in that: the liquid injection port comprises a flow guide pipe, pressure strain pieces, a sealing ring, a liquid discharge nozzle and a pressure regulating valve, the flow guide pipe is embedded in the expansion capsule and is distributed in parallel with the axis of the expansion capsule, two ends of the flow guide pipe are respectively positioned outside the expansion capsule and are communicated with the connecting pipe through connecting pipe heads, two ends of the flow guide pipe are respectively connected with the side wall of the expansion capsule through the sealing ring, a through hole is formed in the pipe wall of the flow guide pipe positioned in the expansion capsule, the through hole is connected with the pressure regulating valve and is communicated with the liquid discharge nozzle through the pressure regulating valve, the pressure strain pieces are at least two and are positioned in the expansion capsule, are uniformly distributed along the axis direction of the flow guide pipe and are connected with the outer surface of the flow guide pipe, and the pressure strain pieces and the pressure regulating valve are both electrically connected with the detection circuit.
6. The coal seam drilling gas leakage amount testing device according to claim 1, characterized in that: the connecting rod is including bearing pipe, ferrule, equalizer and sealed end cap, bear the hollow tubular structure that the pipe is the rectangle for axial cross section, bear the pipe at least two, connect and coaxial distribution through the ferrule between adjacent two bearing pipes, bear the weight of and be connected with sealed end cap in the pipe that lies in foremost in the pipe, the bearing pipe head that lies in rearmost end is connected with the connecting pipe and is connected through connecting pipe and shunt tubes, equalizer quantity is unanimous with leakage fluid dram quantity, and every leakage fluid dram all with an equalizer intercommunication, the equalizer in addition with detection circuit electrical connection.
7. The coal seam drilling gas leakage amount testing device according to claim 1, characterized in that: the detection circuit is a circuit system based on any one of an industrial single chip microcomputer and a programmable controller.
8. The coal seam drilling gas leakage testing device of claim 1, characterized in that: the frame is of a frame structure with a rectangular cross section, the upper end face of the frame is respectively connected with the detection circuit and the booster pump through sliding grooves, a liquid collecting groove is additionally arranged in the frame corresponding to the booster pump, the liquid collecting groove is of a U-shaped groove-shaped structure with the cross section, and is embedded in the frame and positioned under the booster pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220208406.9U CN216841782U (en) | 2022-01-21 | 2022-01-21 | Coal seam drilling gas leakage quantity testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220208406.9U CN216841782U (en) | 2022-01-21 | 2022-01-21 | Coal seam drilling gas leakage quantity testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216841782U true CN216841782U (en) | 2022-06-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220208406.9U Expired - Fee Related CN216841782U (en) | 2022-01-21 | 2022-01-21 | Coal seam drilling gas leakage quantity testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216841782U (en) |
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2022
- 2022-01-21 CN CN202220208406.9U patent/CN216841782U/en not_active Expired - Fee Related
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