Gas extraction drilling hole expansion device

Abstract

The present invention discloses a gas extraction drilling hole opening expansion device, which relates to the field of gas extraction technology. The expansion device comprises: a sealing member, which is used to fit with the inner wall of the hole; a collecting cover, which is connected to the sealing member and is used to collect debris generated during expansion; wherein the sealing member comprises a fixing ring and an air cushion ring sleeved on the outside of the fixing ring, and the fixing ring fits with the inner wall of the hole through the air cushion ring. The gas extraction drilling hole opening expansion device described in the present invention uses an air cushion ring to block the gap between the collecting cover and the inner wall of the hole opening, and sleeves the air cushion ring on the outside of the fixing ring so that the fixing ring does not rub against the inner wall of the hole opening. Therefore, it effectively solves the technical problem of poor safety of the existing gas extraction hole opening expansion device during use, thereby achieving sealing of the hole opening to prevent gas leakage during expansion, thereby improving safety during expansion.

Description

Technical Field

[0001] The invention relates to the technical field of gas extraction, and in particular to a gas extraction drilling hole enlarging device. Background Art

[0002] Gas can be found everywhere in people's daily lives. For example, food cooking and industrial manufacturing all require gas, so people need to extract gas to supply daily needs and industrial uses.

[0003] Gas generally exists in a confined space underground or inside a mountain. When extracting it, it is necessary to drill holes in the area with gas so that people can extract the gas. The existing technology is to use a driver to drive the drill bit to drill holes to release the gas. In actual work, the size of the holes in the gas extraction area needs to be determined more according to the on-site conditions. Due to the different drilling size requirements, it is very inconvenient to frequently replace the drilling drill bit.

[0004] At present, the existing patent with patent publication number CN218150760U discloses a hole-expanding drill bit capable of adjusting the size of the drilling area to improve the concentration of gas extraction, including a drill bit, a connecting frame, a mounting part and a hole-expanding mechanism. The upper part of the drill bit is connected to the connecting frame, and the upper part of the connecting frame is connected to the mounting part. The mounting part is used for an external drive. The rotation of the mounting part will drive the drill bit and the connecting frame to rotate together. The mounting frame is provided with a hole-expanding mechanism for expanding the drilling area. By adjusting the hole-expanding frame, people can better adjust the size of the drilling hole, and when holes of different sizes are needed, there is no need to frequently replace the drill bit to improve the drilling efficiency.

[0005] The existing patent with the patent publication number CN114837566A discloses a spiral gear roller drill bit, including a drill rod; a guide device and a rock breaking and hole expanding device are respectively provided on the drill rod; the guide device includes a center body rotatably mounted on the drill rod; a first roller cutting assembly is rotatably mounted on the center body; the rock breaking and hole expanding device includes a drill bit seat rotatably mounted on the drill rod; a second roller cutting assembly is rotatably mounted on the drill bit seat; the drill bit seat and the first roller cutting assembly are connected via a gear plate; the gear plate is rotatably mounted on the drill rod, fixedly connected to the drill bit seat, and meshedly connected to the first roller cutting assembly. By installing the first roller cutting assembly that can rotate relatively on the center body, it can not only rotate on its own, but also revolve relative to the drill rod through the center body, so it can be effectively guided.

[0006] However, during the implementation of the above technical solution, it was found that there were at least the following technical problems:

[0007] Poor safety and inability to collect debris: When using the existing gas extraction hole (or channel) expansion device, the drill bit is first inserted into the gas extraction hole, and the inner wall of the channel is crushed by the expansion drill bit to increase the inner diameter of the channel, thereby expanding the hole. However, since the expansion drill bit cannot recycle the crushed soil, the soil will fall into the bottom of the channel along the channel, causing the channel to be blocked, and re-drilling is required, which seriously affects the efficiency of subsequent cleaning; secondly, since the density of gas is less than that of air, if the channel is not sealed during expansion, it is easy to cause gas leakage and accidents. For this reason, we propose a gas extraction drilling hole expansion device. Summary of the invention

[0008] 1. Technical issues to be resolved

[0009] In view of the deficiencies in the prior art, the present invention provides a gas extraction borehole opening expansion device to solve the technical problems that the existing gas extraction borehole opening (or channel) expansion devices have poor safety during use and cannot collect debris.

[0010] (II) Technical solution

[0011] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0012] A gas extraction borehole opening reaming device is connected to the reaming drill. The reaming device includes a collecting hood, which can be connected to the bottom of the reaming drill and move synchronously with the movement of the reaming drill. When the reaming drill is working, the generated debris falls from the inner wall of the hole channel and falls into the collecting hood, thereby preventing the debris from blocking the hole channel, thereby reducing the difficulty of subsequent cleaning. In order to prevent gas leakage during drilling, a seal is installed on the collecting hood, which can block the gap between the collecting hood and the inner wall of the hole channel, so that gas cannot leak from the gap between the collecting hood and the hole channel, and can also prevent debris from entering the hole channel, so there will be no blockage, thereby preventing the debris generated by the reaming from obstructing the smooth flow of the hole, so that no subsequent treatment is required:

[0013] The seal is used to fit the inner wall of the hole, thereby reducing gas leakage to a certain extent and improving the safety during hole expansion;

[0014] A collecting hood connected to the sealing member is used to collect the debris generated during hole enlargement, eliminating the need for subsequent cleaning of the debris generated during hole enlargement;

[0015] Among them, the sealing component includes a fixing ring and an air cushion ring mounted on the outside of the fixing ring, like a "swimming ring", which utilizes its flexibility to fit with the inner walls of channels of different shapes, and the fixing ring fits with the inner wall of the hole through the air cushion ring, thereby making flexible contact with the inner wall of the channel, and will not cause wear of the fixing ring.

[0016] Preferably, the fixing ring comprises a plurality of sleeve rods arranged in a circular array, and a connecting rod is connected between two adjacent sleeve rods. The fixing ring is a device formed by alternately connecting the sleeve rods and the connecting rods in sequence, and the connecting rod is inserted in the sleeve rods, which is not only used to connect the two adjacent sleeve rods together, but also can enter the sleeve rods, thereby reducing the volume of the fixing ring and facilitating adaptation to channels with different inner diameters;

[0017] The end of the connecting rod is inserted into the sleeve rod, and the end of the connecting rod and the inner wall of the sleeve rod are connected by a spring, and the elastic force of the spring is toward the center of the sleeve rod, that is, the force applied by the spring to the connecting rod causes the connecting rod to move into the sleeve rod.

[0018] Preferably, the air cushion comprises an airbag wall and an elastic band connected to the inner wall of the airbag wall on the side away from the sleeve rod, so that when the air cushion is deflated, it can move toward the fixed ring under the drive of the elastic band, thereby forming a "wrinkled" air cushion, so that the volume of the air cushion is reduced. At this time, the connecting rod is inserted into the sleeve rod under the action of the spring, thereby reducing the size of the fixed ring, and the elastic band is distributed at a position close to the end of the airbag wall, so that the air cushion can be contracted from the end position;

[0019] The elastic band is always in a stretched state, and the elastic force of the elastic band pulls the airbag wall toward the direction of the sleeve rod, so that when the air cushion ring is deflated, the airbag wall is pulled toward the fixed ring. At this time, the volume of the device is reduced, which is convenient for transportation. At the same time, the volume of the air cushion ring can be reduced, making it convenient to fit with the inner wall of the channel with different inner diameters.

[0020] Preferably, a limiting belt is connected to the inner wall of the airbag wall close to the sleeve rod, and the limiting belt corresponds to the limiting ring sleeved on the outer wall of the sleeve rod;

[0021] Among them, the inner wall of the limiting belt is provided with a sliding groove, and the limiting belt is clamped with the limiting ring outside the sleeve rod through the sliding groove, thereby limiting the range of movement of the air cushion during rotation, avoiding the position of the air cushion when in use, thereby ensuring the stability of the position of the air cushion.

[0022] Preferably, the number of the fixing rings is two groups, and they correspond to each other up and down, and the two corresponding connecting rods up and down are connected by setting a connecting part, so as to adjust the positional relationship between the two fixing rings, so that the two fixing rings can be inclined, away from each other, close to each other, etc., so as to adapt to the shape of the channel;

[0023] The connecting part includes a damper to absorb the vibration generated when the fixing ring collides with the inner wall of the hole, and a traction spring is provided on the outer sleeve of the damper to assist the damper in returning to its original shape, and the two ends of the traction spring are respectively connected to two connecting rods;

[0024] The two ends of the damper are respectively hinged to the two connecting rods, which facilitates relative rotation between the damper and the connecting rod, avoiding that when the device moves to the bend of the channel (or when the upper fixing ring contracts or expands), the fixing ring and the damper cannot move.

[0025] Preferably, a connecting ball is connected to the end of the damper, and the damper is embeddedly connected to the slot on the outer wall of the connecting rod through the connecting ball, so that the damper and the fixing ring can rotate at multiple angles, thereby improving the applicability of the device;

[0026] More than half of the volume of the connecting ball is embedded in the slot, which prevents the connecting ball from moving out of the slot, thereby ensuring the stability of the connection between the connecting ball and the connecting rod.

[0027] Preferably, the fixing ring at the bottom is connected with an extension rod, and is connected to the edge of the collecting cover through the extension rod;

[0028] Among them, the diameter of the collecting hood is smaller than the diameter of the fixing ring when it is fully expanded. At this time, the upper fixing ring is larger than the lower fixing ring, so that a funnel shape is formed between the two fixing rings. Therefore, when entering from the large-aperture channel to the small-aperture channel, the lower fixing ring enters into the small channel, and the air cushion ring between the two fixing rings contacts the transition part of the channel (extrudes the connecting part to shrink the connecting part inward). As the device continues to move downward, the upper fixing ring is squeezed and shrinks (the connecting rod enters the sleeve rod), and finally enters the small channel, thereby fitting with the inner wall of the small channel. This is suitable for channels with different inner diameters and is convenient for sealing channels with different inner diameters.

[0029] Preferably, a belt is provided between the collecting hood and the sealing member to block the gap between the collecting hood and the sealing member, and one end of the belt is bonded to the edge of the collecting hood, and the other end is fitted to the outer wall of the sealing member, and the two are only close to each other but not connected, thereby reducing the gap between the collecting hood and the sealing member to a certain extent, and avoiding a large amount of leakage caused by gas;

[0030] Wherein, the outside of the loop belt is connected to the extension rod, thereby providing support force for the loop belt.

[0031] Preferably, the reamer comprises a drill frame and a plurality of drill bits connected to the drill frame, and a delivery pipe is connected to the center of the drill frame, which can be made of a flexible material or a hard material, and the plurality of drill bits surround the outer wall of the delivery pipe, and the drill bits do not contact the delivery pipe when rotating;

[0032] The reamer is connected to the inner wall of the collecting cover through a delivery pipe, so that the reamer and the collecting cover are connected together for easy linkage.

[0033] Preferably, a nozzle is connected to the drill frame, and the water outlet of the nozzle is facing the drill bit, so as to facilitate washing the mud on the drill bit and allow the muddy water to enter the collection cover;

[0034] The end of the delivery pipe is connected to a water pump, and the delivery pipe delivers the muddy water collected by the collection hood to the outside through the water pump, thereby preventing the muddy water from occupying the internal space of the collection hood and reducing the force applied to the collection hood.

[0035] (III) Beneficial effects

[0036] 1. Since an air cushion ring is used to block the gap between the collecting cover and the inner wall of the orifice, and the air cushion ring is sleeved on the outside of the fixing ring so that the fixing ring does not rub against the inner wall of the orifice, the technical problem of poor safety of the existing gas extraction orifice (or channel) expansion device during use is effectively solved, and the orifice (or channel) is sealed to prevent gas leakage during expansion, thereby improving the safety during expansion.

[0037] 2. Since a collecting hood is used to collect the soil generated during the drilling process and then moves with the drill bit, the technical problem that the existing gas extraction hole (or channel) expansion device cannot collect debris when in use is effectively solved, and the soil generated by the drilling is collected, avoiding the mud and sand generated by the drilling from falling into the channel and causing blockage, thereby improving the convenience of expanding the hole.

[0038] 3. Since the connecting rod and the sleeve rod are connected in a plug-in manner and an elastic band is arranged on the airbag wall, the technical problem that the existing gas extraction orifice (or channel) expansion device cannot cooperate with channels with different inner diameters when in use is effectively solved, and the adjustment of the diameter of the fixed ring is realized, which is convenient for corresponding to orifices with different inner diameters, thereby improving the applicability of the device.

[0039] 4. Since the damper is connected before the two fixed rings, and the damper is engaged with the fixed rings through the spherical connecting ball at its end, the shape of the fixed rings can be adjusted, which avoids the position of the fixed rings being unable to adapt to the shape of the channel. At the same time, it can also reduce the hardness of the device and make it "soft", thereby improving the applicability of the device.

[0040] 5. Since an extension rod is used to connect the lower fixing ring with the collecting cover, the air cushion ring between the two fixing rings is funnel-shaped, so that when the device encounters a stepped structure on the inner wall of the channel, it can pass through stably. At the same time, it can also cooperate with channels with different inner diameters to improve the fit between the device and the inner wall of the channel.

[0041] 6. The nozzle is used to extract the inner wall mud and sand adhering to the drill bit, thereby extracting the water stains and mud and sand generated during hole expansion, thereby ensuring the safety of hole expansion and preventing mud and sand from affecting subsequent hole expansion. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0043] Figure 1 is an overall structural diagram of an embodiment of the present invention;

[0044] Figure 2 A structural diagram of a reamer in an embodiment of the present invention;

[0045] Figure 3 This is a structural diagram of the sealing member when it is unfolded in an embodiment of the present invention;

[0046] Figure 4 It is a structural diagram of the air cushion ring when it is deflated in an embodiment of the present invention;

[0047] Figure 5 For the present invention Figure 3 One of the cross-sectional views;

[0048] Figure 6 For the present invention Figure 3 The second cross-sectional view of

[0049] Figure 7 A structural diagram of a fixing ring in an embodiment of the present invention;

[0050] Figure 8 For the present invention Figure 7 Exploded structure diagram;

[0051] Fig. 9 is a structural diagram of a connecting portion in an embodiment of the present invention;

[0052] Fig.10 For the present invention Figure 7 Structural diagram of the middle fixed ring when it is retracted and extended;

[0053] Fig.11 is a cross-sectional view of the connecting portion in the use state in an embodiment of the present invention;

[0054] Fig.12 Schematic diagram of the movable direction of the connecting part in the embodiment of the present invention

[0055] Fig.13 This is a structural diagram of the separation of the reamer and the collecting cover in an embodiment of the present invention;

[0056] Fig.14 It is a structural diagram of an embodiment of the present invention when the collecting cover is in a mesh shape;

[0057] Fig.15 It is a schematic diagram of the use state of the present invention.

[0058] Legend: 1. Reamer; 11. Drill stand; 12. Drill bit; 13. Nozzle; 2. Collecting hood; 3. Seal; 31. Sleeve rod; 32. Limiting ring; 33. Air cushion; 331. Air bag wall; 332. Elastic band; 333. Limiting band; 34. Connecting rod; 35. Connecting part; 351. Damper; 352. Connecting ball; 353. Traction spring; 36. Extension rod; 4. Delivery pipe; 5. Loop belt; 6. Water pump. DETAILED DESCRIPTION

[0059] The embodiment of the present application provides a gas extraction borehole opening reaming device, which effectively solves the technical problems of poor safety and inability to collect debris in existing gas extraction borehole (or channel) reaming devices during use. When the existing gas extraction borehole (or channel) reaming device is used, an air cushion ring is used to block the gap between the collecting cover and the inner wall of the borehole, and the air cushion ring is sleeved on the outside of the fixing ring so that the fixing ring does not rub against the inner wall of the borehole, thereby achieving sealing of the borehole (or channel) and preventing gas leakage during hole reaming, thereby improving the safety during hole reaming; a collecting cover is used to collect the mud generated during the drilling process and then moves with the drill bit, thereby achieving the collection of the mud generated during the drilling process and preventing the mud and sand generated during the drilling from falling into the channel and causing blockage, thereby improving the convenience of hole reaming; a connecting rod and a sleeve rod are connected in a plug-in manner, and an elastic band is provided on the airbag wall, thereby achieving The adjustment of the diameter of the fixing ring makes it easy to correspond to holes with different inner diameters, thereby improving the applicability of the device; since a damper is connected before the two fixing rings, and the damper is engaged with the fixing ring through the spherical connecting ball at its end, the shape between the fixing rings can be adjusted, avoiding the position of the fixing ring being unable to adapt to the shape of the channel, and at the same time reducing the hardness of the device, making it "soft" (that is, it can change its own shape), thereby improving the applicability of the device; since an extension rod is used to connect the lower fixing ring with the collection cover, the air cushion ring between the two fixing rings is funnel-shaped, thereby achieving stable passage when the device encounters a stepped structure on the inner wall of the channel, and can also cooperate with channels with different inner diameters to improve the fit between the device and the inner wall of the channel; since a nozzle is used to extract the inner wall mud and sand adhering to the drill bit, the water stains and mud and sand generated during hole expansion can be extracted, thereby ensuring the safety of hole expansion and avoiding mud and sand from affecting subsequent hole expansion.

[0060] Example 1

[0061] The technical solution in the embodiment of the present application effectively solves the technical problems that the existing gas extraction hole (or hole channel) expansion device has poor safety and cannot collect debris when in use. The overall idea is as follows:

[0062] In view of the problems existing in the prior art, the present invention provides a gas extraction drilling hole opening reaming device, which is connected to a reamer 1. The reaming device includes a collecting hood 2, which can be connected to the bottom of the reamer 1 and move synchronously with the movement of the reamer 1. When the reamer 1 is working, the generated debris falls from the inner wall of the hole channel and falls into the collecting hood 2, thereby preventing the debris from blocking the hole channel, thereby reducing the difficulty of subsequent cleaning. In order to prevent gas leakage during drilling, a sealing member 3 is installed on the collecting hood 2, which can block the gap between the collecting hood 2 and the inner wall of the hole channel, so that the gas cannot leak from the gap between the collecting hood 2 and the hole channel, and can also prevent the debris from entering the hole channel, so there will be no blockage. Therefore, the debris generated by the reaming is prevented from obstructing the smooth flow of the hole, so that there is no need for subsequent processing:

[0063] The seal 3 is used to fit with the inner wall of the hole, thereby reducing gas leakage to a certain extent and improving the safety during hole expansion;

[0064] The collecting hood 2 is connected to the sealing member 3 and is used to collect the debris generated during the hole enlargement, so that there is no need to clean up the debris generated during the hole enlargement later;

[0065] The seal 3 includes a fixing ring and an air cushion ring 33 sleeved on the outside of the fixing ring, which is like a "swimming ring". The air cushion ring 33 can be fitted with the inner wall of the channel of different shapes by utilizing its flexibility, such as Fig.14 As shown, the fixing ring is fitted with the inner wall of the hole through the air cushion ring 33, so as to make flexible contact with the inner wall of the hole, which will not cause wear of the fixing ring.

[0066] In the specific implementation process, the collecting cover 2 is installed at the bottom of the reamer 1. When the reamer 1 moves in the hole mouth (or channel), the reamer 1 scrapes the soil on the hole wall to form debris. Under the action of gravity, these debris fall into the collecting cover 2 located below the reamer 1. Fig.14 As shown, these debris are collected by the collecting cover 2 to prevent them from entering the channels and causing blockage of the channels.

[0067] After cleaning, the reamer 1 is pulled outward, and the collecting cover 2 connected to the reamer 1 moves upward synchronously, thereby moving to the opening of the channel (if it is not moved out of the hole, it can not only block the hole to prevent gas leakage, but also facilitate reuse). At this time, the debris collected inside the collecting cover 2 can be cleaned, and there is no need to re-clean the hole when using the drilling device, thereby improving the convenience of cleaning.

[0068] During use, since a seal 3 is provided on the top of the collecting hood 2, the gap between the collecting hood 2 and the inner wall of the channel can be blocked to prevent gas leakage. Secondly, since the air cushion ring 33 is sleeved on the outside of the fixing ring and the two are not connected, when the air cushion ring 33 contacts the inner wall of the channel, it can fit tightly with the inner wall of the channel. Moreover, when the collecting hood 2 moves, the fitting position of the air cushion ring 33 and the inner wall of the channel can remain stationary and roll along the inside of the channel, thereby preventing the fixing ring from rubbing against the inner wall of the channel, just like when a "tire" rolls on the ground, it will not rub against the ground. Therefore, by sleeved on the outside of the fixing ring, not only can the gap between the collecting hood 2 and the inner wall of the channel be sealed, but also the friction between the fixing ring and the inner wall of the channel can be avoided, thereby improving the safety of the device.

[0069] Example 2

[0070] Based on Example 1, the embodiment of the present application is to solve the technical problems of the inconvenience of the device being retracted and the inability to change the inner diameter. The overall idea is as follows:

[0071] The fixing ring includes a plurality of sleeve rods 31 arranged in a circular array, and a connecting rod 34 is connected between two adjacent sleeve rods 31. Figure 7 As shown, the fixing ring is a device formed by connecting the sleeve rods 31 and the connecting rods 34 alternately in sequence, and the connecting rods 34 are inserted in the sleeve rods 31, which is not only used to connect two adjacent sleeve rods 31 together, but also can enter the sleeve rods 31, thereby reducing the volume of the fixing ring. Fig.10 As shown, it is convenient to adapt to channels with different inner diameters;

[0072] Among them, the end of the connecting rod 34 is inserted into the inside of the sleeve rod 31, and the end of the connecting rod 34 and the inner wall of the sleeve rod 31 are connected by a spring, and the elastic force of the spring is toward the center of the sleeve rod 31, that is, the force applied by the spring to the connecting rod 34 is to move the connecting rod 34 into the sleeve rod 31.

[0073] In some examples, the air cushion 33 includes an airbag wall 331 and an elastic band 332 connected to the inner wall of the airbag wall 331 away from the sleeve rod 31. Figure 5 and Figure 6 As shown, when the air cushion 33 is deflated, it can move toward the fixed ring under the drive of the elastic band 332, thereby forming a "wrinkled" air cushion 33, so that the volume of the air cushion 33 is reduced. At this time, the connecting rod 34 is inserted into the sleeve rod 31 under the action of the spring, thereby reducing the size of the fixed ring. Figure 7 and Fig.10 As shown, the elastic band 332 is distributed at a position close to the end of the airbag wall 331, as shown in FIG. Figure 4 As shown, the air cushion 33 can be retracted from the end position;

[0074] Among them, the elastic band 332 is always in a stretched state, and the elastic force of the elastic band 332 pulls the airbag wall 331 in the direction of the sleeve rod 31, so that when the air cushion ring 33 is deflated, the airbag wall 331 is pulled in the direction of the fixed ring. At this time, the volume of the device is reduced, which is convenient for transportation. At the same time, it can also reduce the volume of the air cushion ring 33, making it convenient to fit with the inner wall of the channel with different inner diameters.

[0075] In some examples, a limiting belt 333 is connected to the inner wall of the airbag wall 331 close to the sleeve rod 31, and the limiting belt 333 corresponds to the limiting ring 32 sleeved on the outer wall of the sleeve rod 31. Figure 6 As shown;

[0076] Among them, a sliding groove is opened on the inner wall of the limiting belt 333, and the limiting belt 333 is clamped with the limiting ring 32 outside the sleeve rod 31 through the sliding groove, thereby limiting the range of movement of the air cushion ring 33 during rotation, avoiding the position of the air cushion ring 33 from being shifted during use, thereby ensuring the stability of the position of the air cushion ring 33.

[0077] In the specific implementation process, when the air cushion 33 needs to be retracted or released, the air cushion 33 is deflated. At this time, the airbag wall 331 moves toward the fixing ring under the action of the elastic band 332, so that the air cushion 33 is folded up. Figure 4 As shown, at this time, the air cushion 33 of the device is packed and cleaned. Since the end of the connecting rod 34 is inserted into the inside of the sleeve rod 31, and the end of the connecting rod 34 and the inner wall of the sleeve rod 31 are connected by a spring, when the air cushion 33 is deflated, the connecting rod 34 moves toward the inside of the sleeve rod 31 under the action of the spring, thereby reducing the volume of the device. Fig.10 As shown, it is convenient to retract and unfold the device, and it is also convenient to adjust the size of the fixing ring.

[0078] Example 3

[0079] Based on Example 1, the embodiment of the present application is to solve the problem that the fixing ring cannot perform adaptive activities when moving inside the channel. The overall idea is as follows:

[0080] There are two sets of fixing rings, which correspond to each other in the upper and lower parts. The two corresponding connecting rods 34 in the upper and lower parts are connected by setting a connecting part 35. Figure 7 As shown, the positional relationship between the two fixing rings is adjusted so that the two fixing rings can be tilted, moved away from each other, or moved closer to each other, etc., so as to adapt to the shape of the hole;

[0081] The connecting part 35 includes a damper 351 to absorb the vibration generated when the fixing ring collides with the inner wall of the channel, and a traction spring 353 is provided on the outer sleeve of the damper 351 to assist the damper 351 in returning to its original shape. The two ends of the traction spring 353 are respectively connected to the two connecting rods 34, such as Fig. 9 As shown;

[0082] The two ends of the damper 351 are respectively hinged to the two connecting rods 34, which facilitates relative rotation between the damper 351 and the connecting rod 34, avoiding that when the device moves to the bend of the channel (or when the upper fixing ring contracts or expands), the fixing ring and the damper 351 cannot move.

[0083] In some examples, a connecting ball 352 is connected to the end of the damper 351, and the damper 351 is embeddedly connected to the slot on the outer wall of the connecting rod 34 through the connecting ball 352, so that the damper 351 and the fixing ring can rotate at multiple angles, thereby improving the applicability of the device;

[0084] More than half of the volume of the connecting ball 352 is embedded in the slot, which prevents the connecting ball 352 from moving out of the slot, thereby ensuring the stability of the connection between the connecting ball 352 and the connecting rod 34.

[0085] In the specific implementation process, the two fixing rings are connected by the damper 351, which can not only absorb the impact force on the device, but also adjust the distance between the two fixing rings, that is, the two fixing rings can be separated from each other or close to each other.

[0086] Since the damper 351 is connected to the fixing ring via the spherical connecting ball 352, the damper 351 and the fixing ring can rotate at multiple angles, so that the two fixing rings can be tilted and moved, thereby improving the adaptability of the device.

[0087] Example 4

[0088] Based on Example 1, the present application embodiment solves the problem of the gap between the collecting cover and the seal and how to fit with the inner walls of different inner channels. The overall idea is as follows:

[0089] The lower fixing ring is connected to an extension rod 36, and is connected to the edge of the collecting cover 2 through the extension rod 36. Figure 3 As shown;

[0090] The diameter of the collecting hood 2 is smaller than the diameter of the fixing ring when it is fully expanded. Figure 1 As shown, at this time, the upper fixing ring is larger than the lower fixing ring, so that a funnel shape is formed between the two fixing rings. Therefore, when entering from the large-diameter channel to the small-diameter channel, the lower fixing ring enters the small channel, and the air cushion ring 33 between the two fixing rings contacts the transition part of the channel (compressing the connecting part 35 to shrink the connecting part 35 inward). As the device continues to move downward, the upper fixing ring is squeezed and shrinks (the connecting rod 34 enters the sleeve rod 31), and finally enters the small channel, thereby fitting with the inner wall of the small channel, as shown in FIG. Fig.14As shown, it is suitable for channels with different inner diameters, making it convenient to seal channels with different inner diameters.

[0091] In some examples, a band 5 is provided between the collecting hood 2 and the sealing member 3, thereby blocking the gap between the collecting hood 2 and the sealing member 3, and one side of the band 5 is bonded to the edge of the collecting hood 2, and the other end is fitted to the outer wall of the sealing member 3, and the two are only close to each other but not connected, thereby reducing the gap between the collecting hood 2 and the sealing member 3 to a certain extent, and avoiding a large amount of leakage caused by gas;

[0092] The outside of the loop belt 5 is connected to the extension rod 36 , thereby providing support force to the loop belt 5 .

[0093] In the specific implementation process, since the diameter of the collection cover 2 is smaller than the diameter of the fixing ring when it is fully expanded, and the lower fixing ring is indirectly connected to the collection cover 2, such as Figure 1 As shown, at this time, the upper fixing ring is larger than the lower fixing ring, so that a funnel shape is formed between the two fixing rings. Therefore, when entering from the large-diameter channel to the small-diameter channel, the lower fixing ring enters the small channel, and the air cushion ring 33 between the two fixing rings contacts the transition part of the channel (compressing the connecting part 35 to shrink the connecting part 35 inward). As the device continues to move downward, the upper fixing ring is squeezed and shrinks (the connecting rod 34 enters the sleeve rod 31), and finally enters the small channel, thereby fitting with the inner wall of the small channel, as shown in FIG. Fig.14 As shown, it is suitable for channels with different inner diameters, making it convenient to seal channels with different inner diameters.

[0094] Example 5

[0095] Based on Example 1, the embodiment of the present application solves the problem of how to extract muddy water when the reamer is connected to the collection cover. The overall idea is as follows:

[0096] The reamer 1 comprises a drill frame 11 and a plurality of drill bits 12 connected to the drill frame 11, and a delivery pipe 4 is connected to the center of the drill frame 11, which can be made of a flexible material or a hard material. The plurality of drill bits 12 surround the outer wall of the delivery pipe 4, and the drill bits 12 do not contact the delivery pipe 4 when rotating. Figure 2 As shown;

[0097] The reamer 1 is connected to the inner wall of the collecting cover 2 through a delivery pipe 4. Figure 1 As shown, the reamer 1 and the collecting cover 2 are connected together to facilitate linkage.

[0098] In some examples, a nozzle 13 is connected to the drill frame 11, and the water outlet of the nozzle 13 is toward the drill bit 12, so as to facilitate washing the mud on the drill bit 12 and allow the muddy water to enter the collection cover 2;

[0099] Among them, the end of the delivery pipe 4 is connected to a water pump 6, and the delivery pipe 4 transports the muddy water collected by the collecting hood 2 to the outside through the water pump 6, so as to avoid the muddy water occupying the internal space of the collecting hood 2 and reduce the force applied to the collecting hood 2. The integrated collecting hood 2 can hold the muddy water, but it is easy to collide and rub against the inner wall of the channel.

[0100] In addition, a mesh collecting hood 2 can be used as needed to recycle the soil produced by drilling and avoid a hard collision of the collecting hood 2 with the inner wall of the hole (the mesh collecting hood 2 can move and bend freely), but it cannot contain muddy water.

[0101] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A gas extraction borehole opening reaming device, which is connected to a reaming drill (1) and is located below the reaming drill, characterized in that: The hole expanding device comprises: A sealing member (3) adapted to fit against the inner wall of the hole; A collecting hood (2) connected to the sealing member (3) and used for collecting debris generated during hole expansion; The sealing member (3) comprises a fixing ring and an air cushion ring (33) sleeved on the outside of the fixing ring, and the fixing ring is fitted with the inner wall of the hole through the air cushion ring (33); The fixing ring comprises a plurality of sleeve rods (31) arranged in a circular array, and a connecting rod (34) is connected between two adjacent sleeve rods (31); The number of the fixing rings is two groups, and they correspond to each other in the upper and lower parts, and the two corresponding connecting rods (34) in the upper and lower parts are connected by a connecting part (35); The connecting portion (35) includes a damper (351), and a traction spring (353) is sleeved outside the damper (351), and two ends of the traction spring (353) are respectively connected to two connecting rods (34); Both ends of the damper (351) are hinged to the two connecting rods (34) respectively.

2. The gas extraction drilling hole expansion device according to claim 1, characterized in that: The end of the connecting rod (34) is inserted into the interior of the sleeve rod (31), and the end of the connecting rod (34) and the inner wall of the sleeve rod (31) are connected via a spring.

3. The gas extraction drilling hole expansion device according to claim 1, characterized in that: The air cushion ring (33) comprises an airbag wall (331) and an elastic band (332) connected to the inner wall of the airbag wall (331) on a side away from the sleeve rod (31), and the elastic band (332) is distributed at a position close to the end of the airbag wall (331); The elastic band (332) is always in a stretched state, and the elastic force of the elastic band (332) pulls the airbag wall (331) in the direction of the sleeve rod (31).

4. The gas extraction drilling hole expansion device according to claim 3, characterized in that: A limiting belt (333) is connected to the inner wall of the airbag wall (331) on the side close to the sleeve rod (31), and the limiting belt (333) corresponds to a limiting ring (32) sleeved on the outer wall of the sleeve rod (31); The inner wall of the limiting belt (333) is provided with a sliding groove, and the limiting belt (333) is clamped with the limiting ring (32) outside the sleeve rod (31) through the sliding groove.

5. The gas extraction drilling hole enlarging device according to claim 1, characterized in that: The end of the damper (351) is connected to a connecting ball (352), and the damper (351) is embeddedly connected to a slot on the outer wall of the connecting rod (34) via the connecting ball (352); More than half of the volume of the connecting ball (352) is embedded in the slot.

6. The gas extraction drilling hole enlarging device according to claim 1, characterized in that: The fixing ring at the bottom is connected to an extension rod (36), and is connected to the edge of the collecting cover (2) via the extension rod (36); Wherein, the diameter of the collecting hood (2) is smaller than the diameter of the fixing ring when it is fully expanded.

7. The gas extraction drilling hole expansion device according to claim 6, characterized in that: A ring belt (5) is provided between the collecting cover (2) and the sealing member (3), and one side of the ring belt (5) is bonded to the edge of the collecting cover (2), and the other end is in contact with the outer wall of the sealing member (3); The outside of the loop belt (5) is connected to an extension rod (36).

8. The gas extraction drilling hole enlarging device according to any one of claims 1 to 7, characterized in that: The reamer (1) comprises a drill frame (11) and a plurality of drill bits (12) connected to the drill frame (11), and a conveying pipe (4) is connected to the center of the drill frame (11), and the plurality of drill bits (12) surround the outer wall of the conveying pipe (4); Wherein, the reamer (1) is connected to the inner wall of the collecting hood (2) via a delivery pipe (4).

9. The gas extraction drilling hole enlarging device according to claim 8, characterized in that: The drilling frame (11) is connected to a nozzle (13), and the water outlet of the nozzle (13) faces the drilling head (12); The end of the delivery pipe (4) is connected to a water pump (6), and the delivery pipe (4) delivers the muddy water collected by the collection cover (2) to the outside through the water pump (6).

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