Plug-in type pre-drainage drill hole gas extraction pipe

Abstract

The utility model relates to the field of gas disaster prevention and control, and discloses a plug-in type pre-drainage drill hole gas extraction pipe which comprises a pipe body. A bell mouth is formed in one end of the pipe body, a plurality of locking holes are formed in the outer wall of the bell mouth in an annular array mode, the other end of the pipe body serves as an insertion opening connected with the bell mouth in an inserted mode, a plurality of overhanging arms are arranged at the end of the pipe body in an annular array mode, and each overhanging arm is provided with a protruding block matched with the corresponding locking hole; an annular groove is further formed in the outer wall of the end, close to the inserting opening, of the pipe body, and a sealing ring used for sealing the inserting opening and the bellmouth is arranged in the annular groove. According to the utility model, a socket connection mode is adopted, the lugs on the plurality of overhanging arms and the plurality of locking holes on the socket are used for locking, and the sealing ring is used for sealing the socket and the spigot, so that reliable socket connection of two pipelines is realized, and compared with screwed connection, the socket connection is simple to operate, and time-saving and labor-saving.

Description

Technical Field

[0001] The utility model relates to the field of gas disaster prevention and control, in particular to a plug-in type gas drainage pipe for pre-draining boreholes. Background Technique

[0002] Pre-draining coal seam gas through drainage boreholes is the main regional outburst prevention measure for outburst coal seams. The drainage effect of pre-draining boreholes determines the outburst elimination time of the working face. At present, most mines adopt processes such as installing screen pipes throughout the whole length of the pre-draining boreholes and using the "two-block-one-injection" pressure sealing method with bladder bags to ensure the drainage effect. After drilling, due to the soft coal quality and easy hole collapse, the length of the screen pipe is insufficient, which in turn affects the sealing length of the borehole. To avoid this phenomenon, generally, the screen pipe is taken out of the hole again, the drill is used for secondary punching, and then the screen pipe is quickly installed for sealing.

[0003] The connection methods of screen pipes are generally of two types: threaded type and plug-in type. The threaded screen pipes are tightly connected. When pushing and pulling the screen pipes in the borehole, the joints between the pipes are not easily disconnected. However, when installing the screen pipes, it is necessary to manually rotate continuously to connect each screen pipe, which is troublesome, time-consuming and laborious. The two ends of the plug-in screen pipes are respectively a socket and a spigot. A rubber ring for extrusion is provided on the spigot. The connection of the two pipes is realized by the extrusion of the rubber ring. The connection is simple, time-saving and labor-saving, but the connection effect is not firm. When pushing and pulling the screen pipes in the borehole, the joints between the pipes are easily disconnected, and the deep screen pipes may fall into the borehole, which may cause the borehole to be scrapped; if adhesive bonding is used, it is not easy to disassemble when removing the screen pipe, which is time-consuming and laborious.

[0004] Based on this, the present application provides a plug-in type gas drainage pipe for pre-draining boreholes with reliable connection and simple and fast operation to solve the above problems. Content of the Utility Model

[0005] The utility model aims to solve the technical problems existing in the prior art. For this purpose, the utility model provides a plug-in type gas drainage pipe for pre-draining boreholes with reliable connection and simple and fast operation.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] Provide a plug-in type gas drainage pipe for pre-draining boreholes, including a pipe body; one end of the pipe body is provided with a socket, and a plurality of locking holes are annularly arranged on the outer wall of the socket. The other end of the pipe body is used as a spigot for plugging into the socket, and a plurality of outstretched arms are annularly arranged at its end. A convex block matching the locking hole is provided on each outstretched arm; an annular groove is further provided on the outer wall of the pipe body near the spigot end, and a sealing ring for sealing the spigot and the socket is provided in the annular groove.

[0008] In some optional embodiments, the thickness of the protrusion and the outwardly extending arm is equal to the wall thickness of the tube body, and an arc-shaped connecting block is provided between the protrusion and the connecting arm, and the thickness of the connecting block is equal to 1 / 2 of the difference between the outer diameter of the socket and the outer diameter of the plug.

[0009] In some optional embodiments, the locking holes are provided with 2 to 4, preferably 2; the outward extension arms are correspondingly provided with 2 to 4, preferably 2.

[0010] In some optional embodiments, the tube body is integrally formed of PVC material.

[0011] In some optional embodiments, a limiting ring is further provided on the outer wall of the end of the tube body close to the socket, for limiting the position of the socket end.

[0012] In some optional embodiments, the inner wall of the socket end of the tube body also has a plurality of inclined extrusion grooves in a circular array, which are used to squeeze the protrusion when the outward arm is inserted into the socket so that it can enter the socket smoothly.

[0013] In some optional embodiments, each of the extrusion grooves faces a locking hole.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. This utility model adopts a socket connection method, which uses the protrusions on the multiple outriggers to lock with the multiple locking holes on the socket, and uses a sealing ring to seal the socket and the spigot, thereby achieving a reliable socket connection between the two pipes. Compared with threaded connection, it is simple to operate, saves time and effort;

[0016] 2. The setting of the limit ring can accurately control the depth of the socket inserted into the socket. When the socket is inserted into the socket, there is no need to align the protrusion and the locking hole. The socket can be blindly inserted and then rotated to allow the protrusion to automatically lock into the locking hole.

[0017] 3. The extrusion groove provided on the inner wall of the end of the socket can retract the outward-extending arm to facilitate its entry into the socket. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. Among them:

[0019] Figure 1 This is a cross-sectional view of the plug-in pre-drainage borehole gas extraction pipe provided in Example 1;

[0020] Figure 2 Is Figure 1 The top view of the plug-in pre-drained borehole gas drainage pipe provided;

[0021] Figure 3 Is Figure 2 The enlarged right view of the plug-in pre-drained borehole gas drainage pipe provided;

[0022] Figure 4 Is the plug-in structure diagram of the plug-in pre-drained borehole gas drainage pipe provided in the first embodiment;

[0023] Figure 5 Is the cross-sectional view of the plug-in pre-drained borehole gas drainage pipe provided in the second or third embodiment;

[0024] Figure 6 Is[[ID=2,2]] Figure 5 The enlarged left view of the plug-in pre-drained borehole gas drainage pipe provided;

[0025] Figure 7 Is the plug-in structure diagram of the plug-in pre-drained borehole gas drainage pipe provided in the second or third embodiment.[[ID=2,8]]

[0026] In the drawings, the list of components represented by each reference numeral is as follows:

[0027] 1—Socket, 1.1—Locking hole, 1.2—Extrusion groove, 2—Outer extension arm, 2.1—Convex block, 2.2—Connecting block, 3—Sealing ring, 4—Limit ring. Detailed implementation manners

[0028] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model; the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0032] Embodiment 1

[0033] As shown in the attached Figure 1 to the attached Figure 3 figures, this embodiment provides a plug-in pre-drilled borehole gas drainage pipe, including a pipe body. One end of the pipe body is provided with a socket 1, and a plurality of locking holes 1.1 are annularly arranged on the outer wall of the socket 1. The number of locking holes can be set to 2 to 4, and preferably 2 in this embodiment; the other end of the pipe body serves as a socket for plugging into the socket 1, and a plurality of outer extending arms 2 are annularly arranged at its end. Correspondingly, 2 outer extending arms are provided in this embodiment, and each outer extending arm 2 is provided with a convex block 2.1 that matches the locking hole 1.1. When the two drainage pipes in this embodiment are connected, after the outer extending arm of the socket is inserted into the socket, the convex block and the locking hole can be buckled and locked, as shown in the attached Figure 4 figures, so as to realize the reliable socket connection of the two pipes. Compared with the screw connection, the operation is simple, time-saving and labor-saving.

[0034] Preferably, as shown in the attached Figure 1 to the attached Figure 4 figures, the thicknesses of the convex block 2.1 and the outer extending arm 2 are both equal to the wall thickness of the pipe body, and an arc-shaped connecting block 2.2 is further provided between the convex block 2.1 and the connecting arm 2. The thickness of the connecting block 2.2 is equal to 1 / 2 of the difference between the outer diameter of the socket 1 and the outer diameter of the socket. The setting of the connecting block makes the socket and the socket in clearance fit, making it easier for the socket to be inserted into the socket. At the same time, the setting of the connecting block can make the convex block larger, improving the reliability of the pipe connection.

[0035] An annular groove is further provided on the outer wall of the tube body near one end of the socket, and a sealing ring 3 for sealing the socket and the bell 1 is provided in the annular groove. The sealing ring can effectively prevent gas from escaping from the gap between the socket and the bell.

[0036] Preferably, the tube body is integrally formed of PVC material.

[0037] Example 2

[0038] Based on the first embodiment, as shown in the attached Figure 5 and attached Figure 7 As shown, this embodiment further includes a stop ring 4 on the outer wall of the tube body near the socket end, which is used to limit the position of the end of the socket 1. The stop ring provided in this embodiment can accurately control the insertion depth of the socket into the socket. When inserting the socket into the socket, there is no need to align the protrusion with the locking hole. The socket can be blindly inserted and then rotated to allow the protrusion to automatically engage with the locking hole.

[0039] Example 3

[0040] Based on the first or second embodiment, as shown in the attached Figure 5 To the attached Figure 7 As shown, this embodiment further includes a plurality of inclined extrusion grooves 1.2 in a circular array on the inner wall of the end of the socket 1 of the pipe body. These are used to squeeze the protrusion 2.1 when the extension arm 2 is inserted into the socket 1, allowing it to enter the socket smoothly. The extrusion grooves provided in this embodiment can retract the extension arm, facilitating its entry into the socket. During operation, it is only necessary to manually press the extension arm slightly and then align the extension arm with the extrusion grooves for insertion. The extension arm is further retracted under the action of the extrusion grooves until the socket is fully inserted into the socket.

[0041] Preferably, each of the extrusion grooves faces a locking hole.

[0042] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A plug-in type pre-drilled borehole gas drainage pipe, comprising a pipe body; characterized in that: One end of the pipe body is provided with a socket, and a plurality of locking holes are annularly arranged on the outer wall of the socket. The other end of the pipe body serves as a spigot for inserting into the socket, and a plurality of outward extending arms are annularly arranged at its end. A convex block matching the locking hole is provided on each outward extending arm. An annular groove is further provided on the outer wall of the pipe body near the spigot end, and a sealing ring for sealing the spigot and the socket is provided in the annular groove.

2. The plug-in pre-drilled gas drainage pipe according to claim 1, characterized in that: The thicknesses of the convex block and the outward extending arm are both equal to the wall thickness of the pipe body, and an arc-shaped connecting block is further provided between the convex block and the connecting arm. The thickness of the connecting block is equal to 1 / 2 of the difference between the outer diameter of the socket and the outer diameter of the spigot.

3. The plug-in pre-drilled borehole gas drainage pipe according to claim 1, characterized in that: There are 2 to 4 locking holes, and correspondingly 2 to 4 outward extending arms are provided.

4. The plug-in pre-drilled gas drainage pipe according to claim 1, wherein: The pipe body is integrally formed of PVC material.

5. The plug-in pre-drilled gas drainage pipe according to any one of claims 1 to 4, characterized in that: A limit ring is further provided on the outer wall of the pipe body near the spigot end for limiting the end of the socket.

6. The plug-in pre-drilled borehole gas drainage pipe according to claim 5, characterized in that: A plurality of inclined extrusion grooves are annularly arranged on the inner wall of the socket end of the pipe body for extruding the convex block when the outward extending arm is inserted into the socket so that it can smoothly enter the socket.

7. The plug-in pre-drilled gas drainage pipe according to claim 6, characterized in that: Each extrusion groove is aligned with a locking hole.

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