CN212837720U - Drilling gas drainage negative pressure detection device - Google Patents
Drilling gas drainage negative pressure detection device Download PDFInfo
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- CN212837720U CN212837720U CN202021790272.3U CN202021790272U CN212837720U CN 212837720 U CN212837720 U CN 212837720U CN 202021790272 U CN202021790272 U CN 202021790272U CN 212837720 U CN212837720 U CN 212837720U
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Abstract
The utility model discloses a drilling gas drainage negative pressure detecting device, include hollow drill rod, detecting tube, delivery pipe, bearing structure and the pressure pipe of being connected with the rig, the detecting tube sets up inside hollow drill rod, the end that the detecting tube stretched into hollow drill rod is connected delivery pipe, be provided with on the delivery pipe and fix the supporting mechanism on the drilling inner arm with delivery pipe, pressure pipe one end sets up the detecting tube is outside, the other end stretch into in the detecting tube and with the supporting mechanism on the delivery pipe connects. The utility model has the advantages of, guaranteed the detection degree of depth of scouting pipe, effectively avoided drilling pore-forming in-process hole collapse to lead to the problem emergence that the unable survey of downthehole negative pressure to and combine bearing structure's setting, drive scouting pipe to withdraw from drilling when preventing the hollow drill rod push rod, guarantee fixing in the drilling that scouting pipe can be stable, realize the negative pressure detection to the full hole section of drilling, satisfy the drilling negative pressure and survey the requirement.
Description
Technical Field
The utility model relates to a gas is taken out and is adopted negative pressure detection technical field, specifically is a drilling gas is taken out and is adopted negative pressure detection device.
Background
With the rapid development of coal mining technology in China, coal seam gas disasters become important factors restricting the development of high-efficiency intensive mining technology and the requirement of safe production, the conventional or single gas disaster prevention and control technology cannot meet the requirement of high-efficiency safe production of coal mines, and the reinforced gas extraction is the most effective way for preventing gas disaster accidents. At present, the gas drainage effect of a plurality of coal mine bedding drill holes in China is not good, and a plurality of factors which cause poor gas drainage effect comprise low coal seam gas permeability coefficient, poor hole sealing quality, improper drainage negative pressure and the like, wherein the drainage negative pressure is an important factor influencing the gas drainage effect, only the negative pressure is formed inside the drill hole, and the gas desorbed from the coal seam can flow into a drainage pipeline under the action of pressure difference, so that the continuous drainage effect is achieved. With the increase of the drilling depth, due to the influence of the frictional resistance of the hole wall, the pressure drop in the hole along the length direction of the drilling hole is not negligible when gas flows, and therefore, it is very important to grasp the drainage negative pressure value in the drilling hole through a certain device. If a certain place can not form the negative pressure in the drainage drilling hole, because the effect that the gas gathered forms the malleation, then this department gas can not discharge through drainage system, and then forms gas drainage blank zone, very easily causes the gas accident at the in-process that carries out the coal seam stoping, for example, chinese patent utility model discloses a No. CN205908290U discloses a gas drainage drilling negative pressure survey device for survey the negative pressure condition in the drilling hole.
However, the gas extraction negative pressure at the bottom of a drill hole is mostly detected by manually feeding the gas extraction negative pressure into a negative pressure detecting pipe, and because some drill holes are bent, the length of the negative pressure detecting pipe manually fed into the drill hole is extremely limited, especially after a soft coal seam is met, the negative pressure within 20m in the drill hole can be measured, and the distance is limited compared with the design distance of hundreds of meters or even hundreds of meters in a common gas extraction drill hole, so that the reference is greatly different from the actual requirement on the mine, and the extraction negative pressure in a deeper drill hole cannot be detected.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of how to guarantee the detection degree of depth of negative pressure detecting tube.
In order to solve the technical problem, the utility model provides a following technical scheme:
the utility model provides a drilling gas drainage negative pressure detecting device, includes hollow drill rod, detecting tube, delivery pipe, bearing structure and the pressure pipe of being connected with the rig, the detecting tube sets up inside hollow drill rod, the end that the detecting tube stretched into hollow drill rod is connected the delivery pipe, be provided with on the delivery pipe and fix the supporting mechanism on the drilling inner arm with the delivery pipe, pressure pipe one end sets up the detecting tube is outside, the other end stretch into in the detecting tube and with the last supporting mechanism of delivery pipe connects.
The end part of the delivery pipe, far away from the probe pipe, is hemispherical, and a plurality of through holes are formed in the hemispherical end part, so that the friction force of the delivery pipe in the pushing process in the hollow drill rod is reduced, the pushing of the delivery pipe is facilitated, the requirement for air pressure circulation in the delivery pipe is met, and the phenomenon that the piston cannot be pushed due to the fact that the air pressure is not circulated is prevented.
The supporting structure comprises a sealing plate, a piston, a jaw, an elastic piece and a limiting ring, the sealing plate is fixed inside the delivery pipe to divide the interior of the delivery pipe into two parts, a piston which can be tightly attached to the inner wall of the delivery pipe is also arranged in the delivery pipe, a cavity is formed between the piston and the sealing plate, the pressure pipe is connected with the sealing plate in a sealing way and is communicated with the cavity, at least three clamping jaws are hinged on the delivery pipe at one side of the piston, which is far away from the cavity, one end of the clamping jaw is arranged outside the delivery pipe towards the direction of the detection pipe, the other end of the clamping jaw is arranged inside the delivery pipe towards the direction of the bottom of the drill hole and is attached to the piston, an elastic piece is arranged between the clamping jaw arranged outside the delivery pipe and the outer wall of the delivery pipe, a limiting ring is arranged on the inner wall of the delivery pipe between the hinged point of the clamping jaw and the delivery pipe and the piston, so that the phenomenon that the piston cannot recover to the initial position due to the fact that the piston moves too much beyond the hinged point of the clamping jaw is avoided.
Through regard as a hole protecting pipe with hollow drill rod, and will the detecting tube with carry delivery pipe connection fixed and with the pressure pipe with the detection subassembly that bearing structure on the delivery pipe connected formation is from propelling movement to drilling bottom in the hollow drill rod, has guaranteed the detection degree of depth of detecting tube, has effectively avoided the problem that the hole collapse leads to the unable detection of downthehole negative pressure to take place among the drilling pore-forming process to and combine bearing structure's setting, drive the detecting tube and withdraw from drilling when preventing the hollow drill rod push rod, guarantee that fixing that the detecting tube can be stable is in the drilling, realize the negative pressure detection to the drilling full hole section, satisfy drilling negative pressure and survey the requirement.
Preferably, one end of the piston, which is attached to the end of the claw, is conical.
Preferably, the clamping jaws are evenly distributed in three along the radial direction of the delivery pipe.
Preferably, the end of the claw extending out of the delivery tube is pointed.
Preferably, the elastic member is a spring, and the spring is always in a compressed state.
Preferably, a pressure gauge is further provided on the pressure tube outside the probe tube.
Preferably, the probe tube is connected with the delivery tube through threads.
Compared with the prior art, the beneficial effects of the utility model are that:
1. through regard as a hole protecting pipe with hollow drill rod, and will the detecting tube with carry delivery pipe connection fixed and with the pressure pipe with the detection subassembly that bearing structure on the delivery pipe connected formation is from propelling movement to drilling bottom in the hollow drill rod, has guaranteed the detection degree of depth of detecting tube, has effectively avoided the problem that the hole collapse leads to the unable detection of downthehole negative pressure to take place among the drilling pore-forming process to and combine bearing structure's setting, drive the detecting tube and withdraw from drilling when preventing the hollow drill rod push rod, guarantee that fixing that the detecting tube can be stable is in the drilling, realize the negative pressure detection to the drilling full hole section, satisfy drilling negative pressure and survey the requirement.
2. The end part of the delivery pipe is arranged to be hemispherical, and the plurality of through holes are formed in the hemispherical end part, so that the friction force of the delivery pipe in the pushing process in the hollow drill rod is reduced, the pushing of the delivery pipe is facilitated, the requirement for air pressure circulation in the delivery pipe is met, and the phenomenon that the piston cannot be pushed due to the fact that the air pressure is not circulated is prevented from occurring.
3. Can drive jack catch automatic expansion through the elastic component setting, and then make the jack catch chucking after the expansion on the drilling inner wall, realize the fixed to delivery pipe, and then realize fixing the exploring tube.
4. Through the setting of spacing ring, prevent that the piston from removing the too much pin joint that surpasss the jack catch and leading to the phenomenon emergence that the piston can not resume initial position.
Drawings
Fig. 1 is a schematic structural view of a drilling gas extraction negative pressure detection device according to an embodiment of the present invention;
fig. 2 is a schematic view of another state structure according to an embodiment of the present invention.
Detailed Description
In order to facilitate the understanding of the technical solutions of the present invention by those skilled in the art, the technical solutions of the present invention will now be further described with reference to the drawings attached to the specification.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless explicitly stated or limited otherwise, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1, the embodiment discloses a borehole gas extraction negative pressure detection device, which comprises a hollow drill rod 1, a detection pipe 2, a delivery pipe 3, a support structure 4 and a pressure pipe 5, wherein the hollow drill rod 1 is a hollow triangular drill rod; the utility model provides a drilling machine, including sounding pipe 2, conveying pipe 3, the supporting mechanism 4 that can fix conveying pipe 3 on 6 inner arms of drilling are provided with on the conveying pipe 3, 5 one ends in pressure pipe set up 2 external connection pressure conveying equipment (not shown in the figure) of sounding pipe and be provided with manometer (not shown in the figure) on 2 outside in sounding pipe 5 for observe the 5 internal pressure condition in pressure pipe, it is concrete, pressure pipe 5 can be the water pipe, provides pressure to inside water injection, the other end stretch into in sounding pipe 2 and with supporting mechanism 4 on the conveying pipe 3 is connected.
The supporting structure 4 comprises a sealing plate 41, a piston 42, three clamping jaws 43, an elastic piece 44 and a limiting ring 45, the sealing plate 41 is fixed inside the delivery pipe 3 to divide the interior of the delivery pipe 3 into two parts, the piston 42 which can be tightly attached to the inner wall of the delivery pipe 3 is further arranged inside the delivery pipe 3, a cavity 46 is formed between the piston 42 and the sealing plate 41, the pressure pipe 5 is hermetically connected with the sealing plate 41 and communicated with the cavity 46, the delivery pipe 3 on one side, away from the cavity 46, of the piston 41 is hinged with at least three clamping jaws 43, and in the embodiment, the three clamping jaws 43 are uniformly distributed along the radial direction of the delivery pipe 3.
One end of the clamping jaw 43 is arranged outside the delivery pipe 3 towards the direction of the probe pipe 2, the other end of the clamping jaw 43 is arranged inside the delivery pipe 3 towards the bottom of the drill hole 1 and is attached to the piston 42, specifically, one end of the piston 42 attached to the end of the clamping jaw 43 is in a conical shape, and the middle section of the clamping jaw 43 is hinged to the delivery pipe 3; an elastic piece 44 which is always in a compressed state is further arranged between the claw 43 arranged outside the delivery pipe 3 and the outer wall of the delivery pipe 3, and a limit ring 45 is arranged on the inner wall of the delivery pipe 3 between the hinged point of the claw 43 and the delivery pipe 3 and the piston 42, so that the phenomenon that the piston 42 cannot recover to the initial position due to the fact that the piston 42 moves too much beyond the hinged point of the claw 43 is prevented.
Through regarding hollow drill rod 1 as a hole protecting pipe, and will detecting tube 2 with delivery pipe 3 be connected fixedly and with pressure pipe 5 with the detection subassembly propelling movement to drilling 6 bottoms in hollow drill rod 1 that bearing structure 4 on the delivery pipe 3 connected the formation has guaranteed the detection degree of depth of detecting tube 2, has effectively avoided the problem that the hole collapsed and leads to the unable survey of downthehole negative pressure to take place among the 6 pore-forming processes of drilling to and combine bearing structure 4's setting, drive detecting tube withdrawal drilling when preventing hollow drill rod push rod, guarantee that detecting tube can be stable fix in drilling 6, realize the negative pressure of 6 full hole sections of drilling to survey, satisfy the 6 negative pressure of drilling and survey the requirement.
Furthermore, the end of the jaw 43 extending out of the delivery tube 3 is pointed, which facilitates the clamping of the jaw 43 on the inner wall of the borehole 6.
The end part of the delivery pipe 3, which is far away from the probe pipe 2, is hemispherical, a plurality of through holes 31 are formed in the hemispherical end part, and friction force of the delivery pipe 3 in the pushing process of the hollow drill rod 1 is reduced through the hemispherical end part, so that the pushing of the delivery pipe 3 is facilitated, the requirement of air pressure circulation in the delivery pipe 3 is met, and the phenomenon that the piston 42 cannot be pushed due to the fact that the air pressure is not circulated is prevented.
The utility model discloses a theory of operation is: and drilling a required gas extraction borehole 6 through a drilling machine (not shown) and the hollow drill rod 1, connecting and fixing the detection pipe 2 and the delivery pipe 3, and hermetically connecting the pressure pipe 5 and a sealing plate 41 on the delivery pipe 3 to form a detection assembly. The rig is removed, see fig. 2, and pressure is then supplied to the cavity 46 by injecting water through the pressure tube 5, causing the piston 42 to move towards the bottom of the borehole 6, thereby pushing the jaws 43 arranged outside the delivery tube 3 to contract, and then pushing the probe assembly into the hollow drill rod 1 until the delivery tube 3 abuts against the bottom of the borehole 6 and stops pushing. Then the water pressure in the cavity 46 is sucked out through the pressure pipe 5, the claw 43 expands under the elastic force of the elastic piece 44, the piston 42 is driven to return to the initial position, and the detection assembly is pulled outwards slightly, so that the claw 43 after expansion is clamped on the inner wall of the drill hole 6, the delivery pipe 3 is fixed, and the detection pipe 2 is further fixed. The drilling machine is installed at the drilling hole, the hollow drill rod 1 is taken out through the drilling machine, meanwhile, the detecting tube 2 is fixed on the inner wall of the drilling hole 6 through the clamping jaws 43, the detecting tube 2 is prevented from being driven to move when the hollow drill rod 1 is taken out, and the stability of the detecting assembly is guaranteed. And then connecting a gas extraction pipe into the drill hole 6 to extract gas, and detecting the negative pressure at the bottom of the drill hole 6 through the detection pipe 2. After the negative pressure detection at the bottom of the drill hole 6 is finished, water is injected into the cavity 46 through the pressure pipe 5 to provide pressure, so that the piston 42 pushes the clamping jaws 43 to contract, the supporting mechanism 4 falls off from the inner wall of the drill hole 6, and the detection assembly is pulled outwards; after the detection assembly moves outwards to meet the detection moving distance, the water pressure in the cavity 46 is sucked out through the pressure tube 5, the clamping jaw 43 expands under the elastic action of the elastic piece 44, the expanded clamping jaw 43 is clamped on the inner wall of the drill hole 6, the detection tube 2 is fixed again, and negative pressures at different positions of the drill hole 6 are detected. The steps 7 and 8 are repeated in sequence, so that the negative pressure detection in the whole drill hole 6 is realized, the problem that the negative pressure in the hole cannot be detected due to hole collapse in the hole forming process of the drill hole 6 is effectively solved, and the recovery of the detection assembly is also completed after the detection is completed.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The above embodiments only show the embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and for those skilled in the art, a plurality of modifications and improvements can be made without departing from the concept of the present invention, and these modifications and improvements all belong to the protection scope of the present invention.
Claims (7)
1. The utility model provides a drilling gas drainage negative pressure detecting device which characterized in that: the device comprises a hollow drill rod connected with a drilling machine, a probe tube, a delivery tube, a supporting structure and a pressure tube, wherein the probe tube is arranged inside the hollow drill rod, the end of the probe tube extending into the hollow drill rod is connected with the delivery tube, the delivery tube is provided with a supporting mechanism capable of fixing the delivery tube on the inner arm of a drill hole, one end of the pressure tube is arranged outside the probe tube, and the other end of the pressure tube extends into the probe tube and is connected with the supporting mechanism on the delivery tube;
the end part of the delivery pipe, which is far away from the probe pipe, is hemispherical, and a plurality of through holes are formed in the hemispherical end part;
the support structure comprises a sealing plate, a piston, a jaw, an elastic piece and a limiting ring, wherein the sealing plate is fixed inside the delivery pipe to divide the delivery pipe into two parts, the delivery pipe is internally provided with the piston which can be tightly attached to the inner wall of the delivery pipe, a cavity is formed between the piston and the sealing plate, the pressure pipe is connected with the sealing plate in a sealing manner and is communicated with the cavity, the delivery pipe at one side of the piston, which is far away from the cavity, is hinged with at least three jaws, one end of each jaw is arranged outside the delivery pipe towards the direction of the detection pipe, the other end of each jaw is arranged inside the delivery pipe towards the direction of the bottom of a drill hole and is attached to the piston, the elastic piece is arranged between the jaw outside the delivery pipe and the outer wall of the delivery pipe, and the limiting ring is arranged.
2. The borehole gas extraction negative pressure detection device according to claim 1, characterized in that: and one end of the piston, which is attached to the end part of the clamping jaw, is in a conical shape.
3. The borehole gas extraction negative pressure detection device according to claim 1, characterized in that: the jack catch is evenly distributed with three along the radial direction of the delivery pipe.
4. The borehole gas extraction negative pressure detection device according to claim 1, characterized in that: the end part of the claw extending out of the delivery tube is in a pointed shape.
5. The borehole gas extraction negative pressure detection device according to claim 1, characterized in that: the elastic piece is a spring, and the spring is always in a compressed state.
6. The borehole gas extraction negative pressure detection device according to claim 1, characterized in that: and a pressure gauge is also arranged on the pressure pipe outside the detection pipe.
7. The borehole gas extraction negative pressure detection device according to claim 1, characterized in that: the detection tube is connected with the delivery tube through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021790272.3U CN212837720U (en) | 2020-08-24 | 2020-08-24 | Drilling gas drainage negative pressure detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021790272.3U CN212837720U (en) | 2020-08-24 | 2020-08-24 | Drilling gas drainage negative pressure detection device |
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| CN212837720U true CN212837720U (en) | 2021-03-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113175317A (en) * | 2021-04-08 | 2021-07-27 | 中化地质矿山总局地质研究院 | Sensor directional mounting device and mounting method |
| CN114215507A (en) * | 2021-05-21 | 2022-03-22 | 华北科技学院(中国煤矿安全技术培训中心) | Gas pressure measuring device and method based on directional drilling machine |
-
2020
- 2020-08-24 CN CN202021790272.3U patent/CN212837720U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113175317A (en) * | 2021-04-08 | 2021-07-27 | 中化地质矿山总局地质研究院 | Sensor directional mounting device and mounting method |
| CN113175317B (en) * | 2021-04-08 | 2024-04-26 | 中化地质矿山总局地质研究院 | Sensor directional installation device and installation method |
| CN114215507A (en) * | 2021-05-21 | 2022-03-22 | 华北科技学院(中国煤矿安全技术培训中心) | Gas pressure measuring device and method based on directional drilling machine |
| CN114215507B (en) * | 2021-05-21 | 2023-11-17 | 华北科技学院(中国煤矿安全技术培训中心) | Gas pressure measuring device and method based on directional drilling machine |
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