Adjustable drilling gas extraction anti-blocking device

Abstract

The utility model discloses an adjustable drilling gas extraction anti-blocking device. The adjustable drilling gas extraction anti-blocking device comprises an extraction pipe, a supporting pipe is coaxially installed in the extraction pipe in a sleeved mode, an air bag is installed on the supporting pipe, an ejector rod is fixedly installed on the air bag, an air hole is formed in the side wall of the extraction pipe, and an anti-blocking mechanism is arranged in the air hole; the anti-blocking mechanism comprises an air inlet pipe installed in the air hole, and a through hole is formed in the side wall of the air inlet pipe. The ejector rod is inserted into the air inlet pipe; the air bag is provided with an air inlet and outlet assembly. According to the adjustable drilling gas extraction anti-blocking device, the supporting pipe is installed in the extraction pipe, the air inlet pipe is installed in the air hole, the ejector rod is jacked through expansion of the air bag, the ejector rod ejects blocking objects blocking the air inlet pipe out, and therefore the blocking objects can be cleared away more quickly, and the anti-blocking effect is better through cooperation with back flushing operation. And the impurity removal efficiency is higher, and the subsequent gas extraction quality is not easily influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas extraction technical field especially relates to adjustable drilling gas extraction anti -blocking device. BACKGROUND

[0002] Adjustable drilling gas extraction anti -blocking device is the key equipment in the field of coal mine gas control, is mainly used in the process of drilling extraction to prevent coal powder, rock dust and other impurities block the extraction pipeline, can also according to the gas concentration, flow and other parameters dynamic adjustment extraction intensity, guarantee extraction efficiency and safety. Its working process is as follows:

[0003] Extraction starts: start the device after drilling, adopt high flow mode fast extraction gas in initial stage.

[0004] Real-time monitoring: sensor continuously monitors the pressure, flow and impurity content in the pipeline.

[0005] Anti-blocking trigger: when detecting abnormal pressure rise (blockage signs), automatically start back flushing or vibration unblocking.

[0006] Dynamic adjustment: according to the change of gas concentration (such as concentration is lower than the safety threshold), automatically reduce the extraction intensity, avoid excessive extraction leading to air infiltration.

[0007] However, the device uses vibration or back flushing mode to prevent blocking, which cannot effectively detect the blocking position, and can only be fully removed, resulting in a large amount of time consumption and low energy utilization rate during the process of removing the blocking material, and part of the blocking material in the air hole still cannot be effectively removed.

[0008] Therefore, it is necessary to provide an adjustable drilling gas extraction anti-blocking device to solve the above technical problems. UTILITY MODEL CONTENT

[0009] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides an adjustable drilling gas extraction anti-blocking device which can conveniently remove the blockage.

[0010] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0011] Adjustable drilling gas extraction anti-blocking device, including: extraction pipe, coaxially sleeved mounting support pipe in extraction pipe, support pipe is installed on the air bag, air bag is fixedly installed on the top rod, the side wall of extraction pipe is provided with air hole, and the air hole is provided with anti-blocking mechanism;The anti-blocking mechanism includes an air inlet pipe installed in the air hole, a through hole is formed in the side wall of the air inlet pipe, and the top rod is inserted into the air inlet pipe;Air bag is provided with air inlet and exhaust assembly, and the air inlet and exhaust assembly realizes the air inlet and exhaust of air bag.

[0012] Preferably, the air intake and exhaust assembly comprises an air intake and exhaust pipe, the air intake and exhaust pipe is communicated with the air bag, a flow regulating valve is installed on the air intake and exhaust pipe, and an air pump is installed on one end of the air intake and exhaust pipe.

[0013] Preferably, a distance measuring device is installed on the air intake and exhaust pipe, and a measuring head of the distance measuring device is directed to the jacking rod.

[0014] Preferably, one end of the air intake pipe extends out of the extraction pipe.

[0015] Preferably, a rubber plug is installed on the top of the jacking rod.

[0016] Preferably, the top of the rubber plug is hemispherical.

[0017] Preferably, a back-blowing air source is installed on the distal end of the extraction pipe.

[0018] Compared with the prior art, the adjustable drilling gas extraction anti-blocking device has the following beneficial effects:

[0019] (1) The adjustable drilling gas extraction anti-blocking device can quickly remove the blockage by installing a support pipe in the extraction pipe, installing an air intake pipe in the air hole, and lifting the jacking rod by the expansion of the air bag, so that the jacking rod can push out the blockage that blocks the air intake pipe, thereby improving the efficiency of the removal of the blockage and the quality of the subsequent gas extraction.

[0020] (2) The adjustable drilling gas extraction anti-blocking device can conveniently supply air to the air bag and exhaust air by installing an air intake and exhaust assembly comprising an air intake and exhaust pipe, a distance measuring device, and a flow regulating valve, and can indirectly measure the movement distance of the jacking rod to provide data support for judging the blockage of the air intake pipe.

[0021] (3) The adjustable drilling gas extraction anti-blocking device can delay the blockage speed of the air intake pipe by installing the air intake pipe above the outer wall of the extraction pipe.

[0022] (4) The adjustable drilling gas extraction anti-blocking device can conveniently push out the blockage from the air intake pipe by installing a rubber plug on the top of the jacking rod, and can conveniently adjust the air intake speed of the air intake pipe.

[0023] (5) The adjustable drilling gas extraction anti-blocking device makes the top of the rubber plug not easy to stay with the debris for a long time by setting the top of the rubber plug to be hemispherical. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The adjustable drilling gas extraction anti-blocking device provided by the present application is a front view cross-sectional structure schematic diagram.

[0025] Figure 2 The adjustable drilling gas extraction anti-blocking device provided by the present application is a front view cross-sectional structure schematic diagram. Figure 1 The adjustable drilling gas extraction anti-blocking device provided by the present application is a front view cross-sectional structure schematic diagram.

[0026] Wherein, the corresponding name of the reference mark is: 1 - extraction pipe, 2 - support pipe, 3 - air hole, 4 - air inlet pipe, 5 - through hole, 6 - air inlet pipe, 7 - air bag, 8 - exhaust pipe, 9 - distance measuring device, 10 - flow regulating valve, 11 - rubber plug. DETAILED DESCRIPTION

[0027] The utility model will be further explained in combination with the drawings and examples, and the mode of the utility model includes but is not limited to the following examples.

[0028] Example 1:

[0029] As Figures 1-2 The adjustable drilling gas extraction anti-blocking device provided by the utility model comprises an extraction pipe 1, one end of the extraction pipe 1 is connected with a flow collecting pipe, a support pipe 2 is installed in the extraction pipe 1, the support pipe 2 is fixed in the extraction pipe 1 through a mounting bracket, the mounting bracket can adopt an existing coaxial mounting bracket structure, and details are not repeated here, the end portion of the extraction pipe 1 is closed, air holes 3 are uniformly formed in the side wall of the extraction pipe 1, an anti-blocking mechanism is installed in the air holes 3, the anti-blocking mechanism comprises an air inlet pipe 4 installed in the air holes 3, through holes 5 are formed in the side wall of the air inlet pipe 4, a jacking rod 6 is installed in the air inlet pipe 4, the jacking rod 6 is connected with an air bag 7 fixed on the support pipe 2, an air inlet and exhaust assembly is arranged on the air bag 7, in use, gas in the extraction hole enters the pipe through the air inlet pipe 4, then enters the space between the extraction pipe 1 and the support pipe 2 from the through holes 5, part of the gas enters the support pipe 2 and is then sucked into the flow collecting pipe, the other part of the gas is directly sucked into the flow collecting pipe, when the air holes 3, i.e. the air inlet pipe 4, are blocked, the negative pressure in the pipe increases, at this time, the air bag 7 is inflated through the air inlet and exhaust assembly, so that the air bag 7 expands, and then the jacking rod 6 moves along the axial direction of the air inlet pipe 4, the blocking object in the air inlet pipe 4 is pushed out to the outside of the extraction pipe 1, so that the air inlet pipe 4 is restored to be unblocked, the air bag 7 is exhausted through the air inlet and exhaust assembly, so that the jacking rod 6 returns to the initial position, and vibration operation can also be performed during the exhaust process, and back flushing operation is performed after the exhaust is completed, so that the blocking object can be more effectively removed.

[0030] By installing the support pipe 2 in the extraction pipe 1 and installing the air inlet pipe 4 in the air holes 3, the jacking rod 6 is lifted by the expansion of the air bag 7, so that the jacking rod 6 pushes out the blocking object in the air inlet pipe 4, thereby the blocking object can be more quickly removed, and the removal efficiency is higher.

[0031] Example 2:

[0032] As Figures 1-2As shown, the air intake and exhaust assembly includes an air intake and exhaust pipe 8, which is in communication with the air bag 7, and a flow regulating valve 10 is installed on the air intake and exhaust pipe 8, which is used to control the air intake speed and air intake amount of the air bag 7, and the flow regulating valve 10 is electrically controlled. The distal end of the air intake and exhaust pipe 8 is connected with an air pump outside, and a distance measuring device 9 is installed on the air intake and exhaust pipe 8. The structure of the distance measuring device 9 can be selected from the existing distance measuring sensor or distance measuring instrument structure, and the principle and specific structure will not be repeated here. The measuring head of the distance measuring device 9 points to the jacking rod 6. In use, by opening the flow regulating valve 10 on the air intake and exhaust pipe 8, the air pump supplies air to the air bag 7, so that the air bag 7 expands, and the jacking rod 6 moves away from the distance measuring device 9. The air supply amount to the air bag 7 is continuously increased, and the distance of the top of the air bag 7 is measured by the distance measuring device 9, and then the position of the top of the jacking rod 6 is indirectly measured, so as to calculate whether the jacking rod 6 can reach the farthest distance (the farthest distance when the top of the air bag 7 contacts the bottom end of the air inlet pipe 4). If the air bag 7 reaches the standard air pressure, the top end of the jacking rod 6 cannot reach the farthest distance, indicating that the blockage still exists, and the air pressure in the air bag 7 needs to be continuously increased until the top of the air bag 7 contacts the bottom of the air inlet pipe 4, and the value measured by the distance measuring device 9 reaches the maximum. Then the air pump stops and exhausts to release pressure, and the gas in the air bag 7 is discharged through the air intake and exhaust pipe 8. It is worth noting that each air inlet pipe 4 is provided with a distance measuring device 9, and the flow regulating valves 10 in the same column can be connected to the same air intake and exhaust pipe 8.

[0033] By setting the air intake and exhaust assembly including the air intake and exhaust pipe 8, the distance measuring device 9 and the flow regulating valve 10, the air can be conveniently supplied to the air bag 7 and exhausted, and the moving distance of the jacking rod 6 can be indirectly measured, which provides data support for judging the blockage of the air inlet pipe 4.

[0034] Embodiment 3

[0035] As shown in the figure, Figure 2 In this embodiment, one end of the air inlet pipe 4 protrudes out of the extraction pipe 1, so that the coal cinder and other objects will first accumulate near the outer end of the air inlet pipe 4 to exceed the height of the pipe opening, and then enter the air inlet pipe 4, thereby delaying the blockage speed of the air inlet pipe 4.

[0036] By setting the air inlet pipe 4 which protrudes out of the outer wall of the extraction pipe 1, the blockage speed of the air inlet pipe 4 can be slowed down.

[0037] Embodiment 4

[0038] As shown in the figure, Figure 2As shown, in this embodiment, a rubber plug 11 is installed on the top of the push rod 6. During use, the push rod 6 moves inside the air inlet pipe 4 and pushes the rubber plug 11 to move inside the pipe. The rubber plug 11 can push out the blockage in the air inlet pipe 4. When the rubber plug 11 blocks part of the through hole 5, the opening degree of the through hole 5 is changed, and some large-diameter particles cannot continue to pass through the through hole 5. Similarly, when the opening degree of the through hole 5 continues to decrease, the gas passing speed will also decrease accordingly, so that the passing speed of the air inlet pipe 4 is controlled, and the size of the particles entering the extraction pipe 1 is controlled, thus realizing the adjustable gas passing speed of the air inlet pipe 4.

[0039] By installing a rubber plug 11 on the top of the push rod 6, it is possible to easily push out the blockage from the air inlet pipe 4 using the rubber plug 11, and to easily adjust the gas flow rate of the air inlet pipe 4.

[0040] Example 5:

[0041] like Figure 2 As shown, in this embodiment, the top of the rubber stopper 11 is hemispherical. The rubber stopper 11 is sealed to the air intake pipe 4. When the rubber stopper 11 pushes the blockage away from the air intake pipe 4, the blockage is not easy to stay in the rubber stopper 11. The blockage will slide down its spherical surface to the edge.

[0042] By setting the top of the rubber stopper 11 to be hemispherical, it is not easy for debris to remain on the top of the rubber stopper 11 for a long time.

[0043] Example 6:

[0044] In this embodiment, in order to cooperate with the use of this device, a backflush air source is also installed at the far end of the extraction pipe 1. After the device removes the debris in the air inlet pipe 4, there may still be debris stuck in the air inlet pipe 4 and on the top of the rubber stopper 11. The backflush air source can control the backflush gas into the extraction pipe 1 to make the gas in the extraction pipe 1 positive pressure, thereby backflushing the air inlet pipe 4, so that the debris in the air inlet pipe 4 and on the top of the rubber stopper 11 is further removed by the high-speed airflow.

[0045] By installing a backflush air source at the far end of the extraction pipe 1, the extraction pipe 1 can be backflushed, so that the debris in the air inlet pipe 4 can be removed more thoroughly.

[0046] Working principle: in use, the gas in the extraction hole enters the pipe through the inlet pipe 4, then enters the space between the extraction pipe 1 and the support pipe 2 from the through hole 5, part of the gas enters the support pipe 2 and is then sucked into the manifold, the other part of the gas is directly sucked into the manifold, when the air hole 3, i.e. the inlet pipe 4 is blocked, the negative pressure in the pipe increases, at this time, through the air inlet and outlet assembly, air is filled into the air bag 7, which expands, and then pushes the ejector rod 6 to move along the axial direction of the inlet pipe 4, pushing the blockage out of the extraction pipe 1, so that the inlet pipe 4 is restored to unobstructed, the air bag 7 is exhausted through the air inlet and outlet assembly, and the ejector rod 6 returns to the initial position, after the exhaust is completed, the back blowing operation is carried out, which can more effectively remove the blockage in the inlet pipe 4.

Claims

1. An adjustable borehole gas extraction anti-clogging device, characterized in that, include: A sampling pipe (1) is provided, and a support pipe (2) is coaxially sleeved inside the sampling pipe (1). An air bag (7) is installed on the support pipe (2). A top rod (6) is fixedly installed on the air bag (7). An air hole (3) is provided on the side wall of the sampling pipe (1). An anti-blocking mechanism is provided inside the air hole (3). The anti-blocking mechanism includes an air inlet pipe (4) installed in the air hole (3), and a through hole (5) is opened on the side wall of the air inlet pipe (4); The push rod (6) is inserted into the air intake pipe (4); An air intake and exhaust assembly is provided on the airbag (7) to realize the air intake and exhaust of the airbag (7).

2. The adjustable borehole gas extraction anti-blocking device according to claim 1, characterized in that, The intake and exhaust assembly includes an intake and exhaust pipe (8), which is connected to the airbag (7). A flow regulating valve (10) is installed on the intake and exhaust pipe (8), and an air pump is installed at one end of the intake and exhaust pipe (8).

3. The adjustable borehole gas extraction anti-blocking device according to claim 2, characterized in that, A ranging device (9) is installed on the intake and exhaust pipes (8).

4. The adjustable borehole gas extraction anti-blocking device according to claim 1, characterized in that, One end of the air inlet pipe (4) extends out of the extraction pipe (1).

5. The adjustable borehole gas extraction anti-blocking device according to claim 1, characterized in that, The top of the top rod (6) is fitted with a rubber plug (11), and the top of the rubber plug (11) is hemispherical.

6. The adjustable borehole gas extraction anti-blocking device according to claim 1, characterized in that, A backflush gas source is installed at the far end of the extraction pipe (1).

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