CN218724953U - Gas pressure measuring kit - Google Patents
Gas pressure measuring kit Download PDFInfo
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- CN218724953U CN218724953U CN202222823074.8U CN202222823074U CN218724953U CN 218724953 U CN218724953 U CN 218724953U CN 202222823074 U CN202222823074 U CN 202222823074U CN 218724953 U CN218724953 U CN 218724953U
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Abstract
The utility model discloses a gas pressure measuring external member, including coal bed gas chamber, pressure-measuring pipe and rock layer, the bottom of pressure-measuring pipe is established in the coal bed gas chamber, the bottom of pressure-measuring pipe is established outside the rock layer, be equipped with outlet pipe and pressure measuring device on the pressure-measuring pipe outside the rock layer respectively, the bottom of rock layer is equipped with interior shutoff, the rock layer top is equipped with outer shutoff, it has slip casting pipe and back flow pipe to communicate between outer shutoff and the interior shutoff, be equipped with the fixed subassembly that is used for fixing a position the pressure-measuring pipe tip position on the pressure-measuring pipe inside the coal bed gas chamber; the utility model relates to a pressure measurement technical field. This gas pressure survey external member, the fixed subassembly that sets up confirms that the piezometer tube bottom is located the inside position of coal bed gas chamber, and surface piezometer tube bottom does not get into in the coal bed gas chamber or gets into the coal bed gas chamber in too deeply, leads to the piezometer tube winding, causes the jam of inlet port, and then can guarantee the accuracy of above-mentioned gas pressure survey device testing result.
Description
Technical Field
The utility model relates to a ressure measurement technical field specifically is a gas pressure survey external member.
Background
The coal bed gas pressure is one of important gas parameters, the larger the gas pressure is, the larger the coal bed gas content is, and the larger the coal and gas outburst danger is, and the measuring methods thereof include a direct pressure measuring method and an indirect pressure measuring method, and include yellow mud hole sealing, ordinary cement paste hole sealing, rubber ring-mucus hole sealing, polyurethane foam hole sealing, special expansion cement hole sealing, a coal bed original gas content method, a residual gas content method and the like. Various methods are applied to many coal mine enterprises, but the problems of low accuracy exist due to the lack of standardized finished product kits and operating procedures, and the measured gas pressure difference is large.
Publication (bulletin) no: CN202900256U discloses a water discharging device for determining the gas pressure of a coal bed with an elevation hole, which comprises a coal bed gas chamber and a pressure measuring pipe, wherein the top end of the pressure measuring pipe is arranged in the coal bed gas chamber, the bottom end of the pressure measuring pipe is arranged outside a rock stratum, and a water outlet pipe and a pressure measuring device are arranged on the pressure measuring pipe outside the rock stratum; an inner plug is arranged at the position of the coal bed gas chamber port, an outer plug is arranged at the position of the rock gas chamber port, a grouting pipe and a slurry return pipe are communicated between the inner plug and the outer plug, and cement slurry is also arranged between the inner plug and the outer plug; and valves are arranged on the water outlet pipe, the grouting pipe and the slurry return pipe. The utility model has simple structure and convenient operation; the hole sealing effect is good, and the cost is low; the elevation type measurement can discharge a large amount of water accumulated in the pressure measuring air chamber in time, so that the accuracy of measuring the coal bed gas pressure is improved;
in the actual operation process of the device, when the downward pressure measuring hole is sealed by cement paste, the hole is deep, so that the pressure measuring pipe is held by hands before cement paste is injected until the cement paste is solidified, and the pressure measuring pipe is prevented from falling into the bottom of the hole to cause pressure measuring failure.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art, the utility model provides a gas pressure survey external member has solved the technical problem who mentions in the background art.
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a gas pressure measuring kit comprises a coal bed gas chamber, a pressure measuring pipe and a rock layer, wherein the bottom end of the pressure measuring pipe is arranged in the coal bed gas chamber, the bottom end of the pressure measuring pipe is arranged outside the rock layer, the pressure measuring pipe outside the rock layer is respectively provided with a water outlet pipe and a pressure measuring device, the bottom end of the rock layer is provided with an inner plug, the top end of the rock layer is provided with an outer plug, a grouting pipe and a slurry return pipe are communicated between the outer plug and the inner plug, cement slurry is also arranged between the inner plug and the outer plug, and a fixing assembly for positioning the end position of the pressure measuring pipe is arranged on the pressure measuring pipe inside the coal bed gas chamber;
the fixed subassembly includes the sleeve pipe of fixed mounting in the pressure-measuring pipe bottom, sheathed tube upper end fixedly connected with sleeve pipe, sleeve pipe upper end outer wall is equipped with the external screw thread, and has a rotation piece through external screw thread connection, the outer wall of rotating the piece rotates and is connected with the moving member, be equipped with three supporting component of group between moving member and the connecting piece.
Preferably, the supporting component comprises a first supporting rod, a second supporting rod and a rotating shaft, the middle of the first supporting rod is rotatably connected with the middle of the second supporting rod through the rotating shaft, one end, close to the top of the pressure measuring pipe, of the first supporting rod is hinged to the moving part, and one end, close to the bottom of the pressure measuring pipe, of the second supporting rod is hinged to the connecting part.
Preferably, the bottom of the piezometric tube is provided with a plurality of air inlets and is wrapped by gauze.
Preferably, the water outlet pipe, the grouting pipe and the slurry return pipe are all provided with valves, and the valves are ball valves.
Advantageous effects
The utility model provides a gas pressure survey external member. Compared with the prior art, the method has the following beneficial effects:
(1) This gas pressure survey external member, through first bracing piece, the tip of second bracing piece and coal bed gas chamber inner wall contact is equipped with the elastic layer, for example, elastic rubber material, above-mentioned supporting component has the characteristic of rigidity piece and flexible piece concurrently, thereby can reach the direction and support multiple functions, wherein first bracing piece is the rigidity piece with the second bracing piece, can play better direction and supporting role to the pressure-measuring pipe, the elastic layer is the flexible piece, it not only can increase the frictional force between the inner wall of supporting component and coal bed gas chamber, thereby confirm that the pressure-measuring pipe bottom is located the inside position of coal bed gas chamber, surface pressure-measuring pipe bottom does not get into in the coal bed gas chamber or gets into the coal bed gas chamber indoor too deeply, lead to the pressure-measuring pipe winding, cause the jam of inlet port, and then can guarantee the accuracy of above-mentioned gas pressure survey device testing result.
(2) The gas pressure measuring kit is characterized in that the prepared quick-setting expansive cement slurry is injected through the grouting pipe, and in the grouting solidification process, the pressure measuring pipe can be arranged on the side wall of the coal bed gas chamber through the mutually matched fixing components, so that the pressure measuring pipe can be prevented from falling into the bottom of the coal bed gas chamber without being held by hands, the operability of the gas pressure measuring device is improved, the operation is simple and easy, the engineering quantity is small, the gas pressure measuring kit is suitable for measuring the coal bed gas in downward holes under various geological conditions, and the popularization value is very good.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of the middle fixing component of the present invention.
In the figure: 1. a coal bed gas chamber; 2. a piezometric tube; 3. a rock layer; 4. a valve; 5. inner plugging; 6. external plugging; 7. a grouting pipe; 8. a slurry return pipe; 9. a fixing assembly; 201. a water outlet pipe; 202. a pressure measuring device; 203. an air inlet; 901. a sleeve; 902. a connecting member; 903. an external thread; 904. a moving member; 905. a rotating member; 906. a first support bar; 907. a second support bar; 908. and rotating the shaft.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: a gas pressure measuring kit comprises a coal bed gas chamber 1, a pressure measuring pipe 2 and a rock layer 3, wherein the bottom end of the pressure measuring pipe 2 is arranged in the coal bed gas chamber 1, the bottom end of the pressure measuring pipe 2 is arranged outside the rock layer 3, the pressure measuring pipe 2 outside the rock layer 3 is respectively provided with a water outlet pipe 201 and a pressure measuring device 202, the bottom end of the rock layer 3 is provided with an inner plugging 5, the top end of the rock layer 3 is provided with an outer plugging 6, the outer plugging 6 is quick-drying cement, a grouting pipe 7 and a slurry return pipe 8 are communicated between the outer plugging 6 and the inner plugging 5, cement slurry is also arranged between the inner plugging 5 and the outer plugging 6, and the pressure measuring pipe 2 inside the coal bed gas chamber 1 is provided with a fixing component 9 for positioning the end position of the pressure measuring pipe 2;
fixed subassembly 9 includes the sleeve pipe 901 of fixed mounting in pressure-measuring pipe 2 bottom, the upper end fixedly connected with sleeve pipe 901 of sleeve pipe 901, sleeve pipe 901 upper end outer wall is equipped with external screw thread 903, and be connected with through external screw thread 903 and rotate piece 905, the bottom of rotating piece 905 and the top threaded connection of sleeve pipe 901, the outer wall rotation of rotating piece 905 is connected with moving piece 904, be equipped with three supporting component of group between moving piece 904 and the connecting piece 902, in this embodiment, rotate piece 905 through rotating, it can drive moving piece 904 and be located sleeve pipe 901 and move down to rotate piece 905, make it can promote three supporting component of group to expand and form the supporting role to pressure-measuring pipe 2 bottom with the contact of coal bed gas chamber 1 inner wall to rotate piece 905.
As shown in fig. 2, the support assembly includes a first support rod 906, a second support rod 907 and a rotation shaft 908, the middle portions of the first support rod 906 and the second support rod 907 are rotatably connected through the rotation shaft 908, one end of the first support rod 906, which is close to the top of the pressure measuring pipe 2, is hinged to the moving member 904, one end of the second support rod 907, which is close to the bottom of the pressure measuring pipe 2, is hinged to the connecting member 902, in this embodiment, an elastic layer, such as an elastic rubber material, is disposed at an end portion of the first support rod 906, where the second support rod 907 contacts with the inner wall of the coal bed gas chamber 1, and the support assembly combines the characteristics of a rigid member and a flexible member, so as to achieve multiple functions of guiding and supporting, wherein the first support rod 906 and the second support rod 907 are rigid members, and can provide good guiding and supporting effects for the pressure measuring pipe 2, and the elastic layer is a flexible member, which not only can increase the friction force between the support assembly and the inner wall of the coal bed gas chamber 1, thereby determining the position of the bottom of the pressure measuring pipe 2 inside the coal bed gas chamber 1, and further ensuring accurate measurement of the gas inlet hole pressure measuring device.
As shown in fig. 1, a plurality of air inlets 203 are opened at the bottom of the pressure-measuring pipe 2 and wrapped by gauze, in this embodiment, in order to ensure smooth circulation of gas, the outer diameter of the pressure-measuring pipe 2 may be 6-10 mm, the diameter of the air inlets 203 may be 3-7 mm, and gauze is wrapped at the positions of the air inlets 203 at the bottom of the pressure-measuring pipe 2, so as to prevent impurities such as coal dust in a coal seam from entering the pressure-measuring pipe 2.
As shown in fig. 1, valves 4 are arranged on the water outlet pipe 201, the grouting pipe 7 and the slurry return pipe 8, the valves 4 are ball valves, in this embodiment, the valves 4 have dual functions of isolation and pressure relief, and when gas pressure measurement is required, the valves 4 are in a closed state, so that the hose 7 and the coal bed gas chamber 1 can be isolated from the outside; when the test is finished, valve 4 is in the open mode, can carry out the pressure release through valve 4, then demolish gas pressure survey device, in addition, when the too big threshold value that surpasss of gas pressure in coal bed gas chamber 1, can carry out the pressure release through opening valve 4 to avoid pressure measurement device 202's damage, improved above-mentioned gas pressure survey device's security.
And those not described in detail in this specification are well within the skill of those in the art.
When the device works, the coal bed air chamber 1 is cleaned by a compressed air pipeline and then connected with the pressure measuring pipe 2, the rotating part 905 is rotated to drive the moving part 904 to move downwards on the sleeve 901, so that the rotating part 905 can push three groups of supporting components to expand and contact with the inner wall of the coal bed air chamber 1 to support the bottom of the pressure measuring pipe 2, the bottom of the pressure measuring pipe 2 is connected to the inner position of the coal bed air chamber 1, the grouting pipe 7 and the slurry return pipe 8 are put into the rock layer 3 from the top, after the pipeline is connected, the top of the coal bed air chamber 1 is plugged by the inner plugging pipe 5, and the rock layer 3 is plugged by the outer plugging 6 and used for fixing the pressure measuring pipe 2, the grouting pipe 7 and the slurry return pipe 8; then, the prepared quick-setting expansive cement slurry is injected from the grouting pipe 7, in the grouting solidification process, the pressure measuring pipe 2 can be arranged on the side wall of the coal bed gas chamber 1 through the mutually matched fixing component 9, the pressure measuring pipe 2 can be prevented from falling into the bottom of the coal bed gas chamber 1 without being held by hands, and therefore the operability of the gas pressure measuring device is improved, the operation is simple and easy, the engineering quantity is small, the device is suitable for measuring the coal bed gas in downward holes under various geological conditions, and the popularization value is very good; a water outlet pipe 201 and a pressure measuring device 202 are arranged on the pressure measuring pipe 2 outside the rock layer 3, and a valve 4 is arranged on the water outlet pipe 201, so that when the reading of the pressure measuring device 202 reaches a certain position, the valve 4 on the water outlet pipe 201 is slowly opened to see whether water is discharged or not, if gas is discharged, the valve is closed immediately, and the numerical value displayed by the pressure measuring device 202 at the moment is the actual numerical value of the gas pressure in the coal bed gas chamber 1; if there is the rivers to go out, slowly the play water, wait that the water is put the back, quick valve 4, the data that at this moment show also is the actual numerical value of the gas pressure in the coal bed gas chamber 1, and the water in the coal bed gas chamber 1 can be discharged, just so can in time discharge the coal bed gas chamber 1 in a large amount of water of gathering to improve the accuracy of coal bed gas pressure survey, above is exactly the theory of operation of a gas pressure survey external member.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a gas pressure survey external member, includes coal bed gas chamber (1), piezometer pipe (2) and rock layer (3), its characterized in that: the bottom end of the pressure measuring pipe (2) is arranged in the coal bed gas chamber (1), the bottom end of the pressure measuring pipe (2) is arranged outside the rock layer (3), the pressure measuring pipe (2) outside the rock layer (3) is respectively provided with a water outlet pipe (201) and a pressure measuring device (202), the bottom end of the rock layer (3) is provided with an inner plugging seal (5), the top end of the rock layer (3) is provided with an outer plugging seal (6), a grouting pipe (7) and a slurry return pipe (8) are communicated between the outer plugging seal (6) and the inner plugging seal (5), cement slurry is further arranged between the inner plugging seal (5) and the outer plugging seal (6), and the pressure measuring pipe (2) inside the coal bed gas chamber (1) is provided with a fixing component (9) for positioning the end position of the pressure measuring pipe (2);
the fixed component (9) comprises a sleeve (901) fixedly installed at the bottom end of the piezometer tube (2), the upper end of the sleeve (901) is fixedly connected with the sleeve (901), the outer wall of the upper end of the sleeve (901) is provided with an external thread (903), a rotating part (905) is connected with the external thread (903), the outer wall of the rotating part (905) is rotatably connected with a moving part (904), and three groups of supporting components are arranged between the moving part (904) and the connecting part (902).
2. The gas pressure measuring kit according to claim 1, wherein: the supporting component comprises a first supporting rod (906), a second supporting rod (907) and a rotating shaft (908), the middle parts of the first supporting rod (906) and the second supporting rod (907) are rotatably connected through the rotating shaft (908), one end, close to the top of the pressure measuring pipe (2), of the first supporting rod (906) is hinged to the moving piece (904), and one end, close to the bottom of the pressure measuring pipe (2), of the second supporting rod (907) is hinged to the connecting piece (902).
3. The gas pressure measuring kit according to claim 1, wherein: the bottom of the pressure measuring pipe (2) is provided with a plurality of air inlets (203) and is wrapped by gauze.
4. The gas pressure measuring kit according to claim 1, wherein: all be equipped with valve (4) on outlet pipe (201), slip casting pipe (7) and slurry return pipe (8), valve (4) are the ball valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222823074.8U CN218724953U (en) | 2022-10-26 | 2022-10-26 | Gas pressure measuring kit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222823074.8U CN218724953U (en) | 2022-10-26 | 2022-10-26 | Gas pressure measuring kit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218724953U true CN218724953U (en) | 2023-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222823074.8U Active CN218724953U (en) | 2022-10-26 | 2022-10-26 | Gas pressure measuring kit |
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|---|---|
| CN (1) | CN218724953U (en) |
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2022
- 2022-10-26 CN CN202222823074.8U patent/CN218724953U/en active Active
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