A welding device for gas extraction pipeline

Abstract

The present invention discloses a welding device for gas extraction pipelines, which relates to the field of welding devices, including a welding station, a table body, and a back plate extending above the table body; a strip groove is provided on the top surface of the table body, and a first pipe clamp located at one end of the strip groove is arranged on the table body; a second pipe clamp is slidably arranged on the back plate, and also includes a rotating mechanism for driving the second pipe clamp to rotate; the axis of the first pipe clamp is parallel to the long axis of the strip groove, the second pipe clamp is directly opposite to the first pipe clamp, and the axis of the second pipe clamp is always coplanar with the long axis of the strip groove; the welding station is located at one end of the strip groove close to the first pipe clamp. The present invention provides a welding device for gas extraction pipelines to solve the problem of inconvenient welding and labor consumption of gas extraction pipeline components in the prior art, and achieve the purpose of reducing labor consumption and improving welding efficiency.

Description

Technical Field

[0001] The invention relates to the field of welding devices, and in particular to a welding device for a gas extraction pipeline. Background Art

[0002] Gas refers to methane-based gas in mines, which is mainly composed of coalbed methane, and sometimes refers to methane alone. It is colorless, tasteless, odorless, can burn or explode, is difficult to dissolve in water, and has higher diffusion than air. The "Coal Mine Safety Regulations" stipulate that as long as gas is found in a coal (rock) layer in a mine, the mine is a gas mine. Gas mines must be managed according to the mine gas grade, and mine gas extraction devices must be used in the mine to ensure that the gas concentration in the mine is within a safe range. Gas extraction is not only an important measure to reduce the amount of gas outflow during the mining process, prevent gas over-limit and accumulation, and prevent gas explosions and coal and gas outburst accidents, but also can turn harm into benefit and be developed and utilized as a resource associated with coal.

[0003] When extracting gas, a hole is usually opened in the well wall to the depth of the coal seam, and then a guide pipe is inserted into it for extraction. The traditional guide pipe has a simple structure and is easily damaged by corrosion, formation stress, and coal seam collapse, which interferes with the extraction efficiency and easily brings safety hazards. Based on this, the applicant in this case designed a pipeline assembly dedicated to gas extraction and submitted a patent application on the same day as this case. The pipeline assembly includes a guide pipe and an outer pipe distributed inside and outside, a gas adsorption material filled between the guide pipe and the outer pipe, and two sealing sections located at both ends. When installing the pipeline assembly, it is necessary to connect it as a whole in advance, but because the structure of the pipeline assembly is relatively complex, both ends need to be fully welded and connected, and the inside needs to be filled with gas adsorption material, the welding process is inconvenient to operate. If the traditional welding method is used, at least two people are required to cooperate to complete it, and welding stations need to be set up at both ends of the pipeline. Therefore, it is necessary to design a welding device for the above-mentioned pipeline assembly to reduce manpower consumption and improve welding efficiency. Summary of the invention

[0004] The present invention provides a welding device for a gas extraction pipeline, so as to solve the problem in the prior art that it is inconvenient to weld gas extraction pipeline components and it consumes manpower, thereby achieving the purpose of reducing manpower consumption and improving welding efficiency.

[0005] The present invention is achieved through the following technical solutions:

[0006] A welding device for a gas extraction pipeline comprises a welding station, a platform, and a back plate extending above the platform; a strip groove is provided on the top surface of the platform, and a first pipe clamp is arranged on the platform and located at one end of the strip groove; a second pipe clamp is slidably arranged on the back plate, and also comprises a rotating mechanism for driving the second pipe clamp to rotate; the axis of the first pipe clamp is parallel to the long axis of the strip groove, the second pipe clamp is opposite to the first pipe clamp, and the axis of the second pipe clamp is always coplanar with the long axis of the strip groove; the welding station is located at one end of the strip groove close to the first pipe clamp.

[0007] In view of the problem that the gas extraction pipeline assembly is inconvenient to weld and consumes manpower in the prior art, the present invention proposes a welding device for gas extraction pipelines. The device includes a platform, and a back plate is partially or completely located on the platform. The first pipe clamp and the second pipe clamp are both used to clamp the welded pipeline assembly, and the existing clamps can be used. The device is provided with a strip groove on the top surface of the platform, and the width of the strip groove must be greater than the maximum outer diameter of the welded pipeline assembly to ensure that the pipeline assembly can enter the strip groove. The first pipe clamp is located on the platform and is arranged at one end of the strip groove, and the second pipe clamp is arranged on the back plate. The second pipe clamp can slide on the back plate, and then adjust the clamping position of the second pipe clamp outside the welded pipeline assembly to achieve the rotation and transposition function required by the present application. The second pipe clamp in the present application can also rotate, but no matter what angle it rotates to, it must always keep its axis coplanar with the long axis of the strip groove, so as to ensure the stable flipping of the welded pipeline assembly, and the pipeline assembly can partially enter the strip groove during the flipping process.

[0008] The present application enables a single person to complete the installation, filling and welding processes of the gas extraction pipe assembly, without the need for two people to cooperate in the operation, thereby reducing manpower consumption and improving welding efficiency; the present application realizes flexible flipping of the pipe assembly through the cooperation of the strip groove and the second pipe clamp, which facilitates the rapid completion of the welding of the two ends, and only requires one welding station to complete the overall welding operation; the present application completes the flipping of the pipe assembly in a longitudinal manner, avoiding the problem of occupying the site and interfering with other operations when flipping it in a horizontal plane in a transverse manner due to the large length of the pipe.

[0009] Furthermore, the first pipe clamp is mounted on a first slide block, the first slide block is slidably fitted on a first slide rail, the first slide rail is located at one end of the strip groove, and the first slide rail is parallel to the long axis of the strip groove.

[0010] In this solution, the position of the first tube clamp is adjustable by setting the first slide rail and the first slider. When the first tube clamp is needed for clamping, it is placed close to the strip groove to facilitate clamping the end of the pipe assembly. When the first tube clamp is not needed for clamping, such as when the pipe assembly needs to be flipped, the first tube clamp is placed away from the strip groove and then out of the area of ​​the pipe assembly, so that the second tube clamp can flexibly flip the pipe assembly.

[0011] Furthermore, it also includes a first driving device for driving the first slider to slide on the first slide rail. This solution can realize non-manpower adjustment of the position of the first slider, further reducing manpower consumption, and at the same time is conducive to ensuring the adjustment accuracy. Any driving device in the prior art that can move the channel slider on the corresponding slide rail can be applied to this solution.

[0012] Furthermore, a second slide rail is provided on one side surface of the back plate facing the direction where the strip groove is located, the second slide rail is parallel to the top surface of the platform, a second slider is slidably fitted on the second slide rail, and the second pipe clamp is connected to the second slider.

[0013] This solution clearly defines the sliding connection method of the second pipe clamp on the back plate, and the second pipe clamp can be moved to different positions of the welded pipe assembly as needed, thereby meeting the use of different operation stages during the welding process.

[0014] Furthermore, the rotating mechanism includes a motor fixedly mounted on the second slider, the output end of the motor is connected to a mounting seat, and the second pipe clamp is arranged on the mounting seat; the rotating shaft of the output end of the motor is perpendicular to the surface of the back plate.

[0015] In this solution, the motor slides with the second slider, and the motor drives the mounting seat and the second pipe clamp to rotate synchronously. It is only necessary to ensure that the second pipe clamp stably clamps the welded pipe assembly to achieve stable flipping and adjustment of the pipe assembly.

[0016] Furthermore, a second driving device for driving the second slider to slide on the second slide rail is also included. This solution can realize non-manpower adjustment of the position of the second slider, further reducing manpower consumption, and at the same time is conducive to ensuring the adjustment accuracy. Any driving device in the prior art that can move the channel slider on the corresponding slide rail can be applied to this solution.

[0017] Furthermore, a lifting platform is provided at one end of the bottom of the strip groove close to the direction where the first pipe clamp is located; the lifting platform is located below the second slide rail. During the working process of this application, when the welded pipe assembly is in a vertical state, it is necessary to sleeve an outer pipe or weld a corresponding sealing ring at the end; in the process of sleeve the outer pipe, it is necessary to loosen the clamping of the first pipe clamp, and a downward thrust may be generated in the process of welding the sealing ring, both of which are not conducive to maintaining the stability of the pipe assembly; based on this, the present scheme also provides a lifting platform at one end of the bottom of the strip groove close to the direction where the first pipe clamp is located. When the welded pipe assembly is rotated to a vertical state, its bottom end is moved to the top of the lifting platform, and the lifting platform is lifted to make it contact with the bottom end of the pipe assembly, and then the lifting platform is supported, which significantly improves the stability during the aforementioned operation. The height of the lifting platform is adjustable and can be adapted to welding operations of pipe assemblies of different lengths.

[0018] Furthermore, a sensing device for sensing the welded pipe, such as a pressure sensor, a distance sensor or an infrared sensor, is disposed on the top of the lifting platform.

[0019] Furthermore, a lifting device is provided at one end of the bottom of the strip groove away from the direction where the first pipe clamp is located; and a bearing member is provided at the top of the lifting device. In the process of flipping the pipeline assembly, the present application needs to rely on the second pipe clamp to independently bear the load, which causes great losses to the second pipe clamp and its corresponding rotating mechanism, and there are certain hidden dangers in stability and safety. Based on this, the present solution also provides a lifting device at one end of the bottom of the strip groove away from the direction where the first pipe clamp is located. When the pipeline assembly is normally in a horizontal state, the bearing member is raised to the end of the pipeline assembly by the lifting device; in the process of flipping the pipeline assembly downward, the lifting device can be synchronously shortened downward until the pipeline assembly leaves the range of the bearing member; in the process of flipping the pipeline assembly upward, when the end of the pipeline assembly is located in the space above the bearing member, the lifting device can be moved upward to abut against the bearing member and then synchronously extended upward. Therefore, the present solution can temporarily bear the end of the pipeline assembly away from the first pipe clamp through the lifting device, significantly improving the safety and stability during the flipping of the pipeline assembly.

[0020] Furthermore, the top surface of the bearing member is configured as an arc surface, and the axis of the arc surface is parallel to the long axis of the strip groove, so that the welded pipe assembly can be received by the arc surface at the top of the bearing member, thereby improving the bearing stability.

[0021] Compared with the prior art, the present invention has at least the following advantages and beneficial effects:

[0022] 1. The welding device for gas extraction pipeline of the present invention is convenient for one person to complete the installation, filling and welding process of gas extraction pipeline components, without the need for two people to cooperate in operation, thereby reducing manpower consumption and improving welding efficiency.

[0023] 2. The present invention provides a welding device for a gas extraction pipeline, which realizes flexible flipping of the pipeline assembly, facilitates rapid welding of the two ends, and only requires one welding station to complete the overall welding operation; and the present application completes the flipping in a longitudinal manner, avoiding the problem of occupying space and interfering with other operations when flipping in a horizontal plane in a transverse manner due to the large length of the pipeline.

[0024] 3. The welding device for gas extraction pipelines of the present invention can be temporarily supported by a lifting platform, which significantly improves the stability during operation; the height of the lifting platform is adjustable and can be adapted to welding operations of pipeline components of different lengths.

[0025] 4. The welding device for gas extraction pipeline of the present invention can temporarily support the end of the pipeline assembly away from the first pipe clamp through the lifting device, thereby significantly improving the safety and stability during the process of turning over the pipeline assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0027] Figure 1 It is a structural schematic diagram of a specific embodiment of the present invention;

[0028] Figure 2 It is a cross-sectional view through the axis of the strip groove of a specific embodiment of the present invention;

[0029] Figure 3 is a schematic diagram of a welded gas extraction pipeline assembly in a specific embodiment of the present invention;

[0030] Figure 4 It is a schematic diagram of a welding process of a specific embodiment of the present invention;

[0031] Figure 5 It is a schematic diagram of the gas extraction pipeline after installation according to a specific embodiment of the present invention.

[0032] Marks and corresponding parts names in the attached drawings:

[0033] 1- flow guide tube, 2- first outer tube, 201- tube bottom, 3- annular gap, 4- first sealing ring, 5- first sealing ring, 6- second sealing ring, 7- second sealing ring, 8- third sealing ring, 9- second outer tube, 901- first area, 902- second area, 10- partition, 11- limiter, 12- baffle, 13- torsion spring, 14- first gas concentration monitoring device, 15- second gas concentration monitoring device;

[0034] 16- platform, 17- back plate, 18- strip groove, 19- first pipe clamp, 20- second pipe clamp, 21- first slider, 22- first slide rail, 23- second slide rail, 24- second slider, 25- motor, 26- mounting seat, 27- lifting platform, 28- induction device, 29- lifting device, 30- bearing member. DETAILED DESCRIPTION

[0035] In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the examples and the accompanying drawings. The schematic embodiments of the present invention and the description thereof are only used to explain the present invention and are not intended to limit the present invention. In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention 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 cannot be understood as limiting the scope of protection of the present application.

[0036] Example 1

[0037] like Figure 1 and Figure 2 A welding device for gas extraction pipeline shown in the figure comprises a welding station, a platform 16, and a back plate 17 extending above the platform 16; a strip groove 18 is provided on the top surface of the platform 16, and a first pipe clamp 19 is arranged on the platform 16 and located at one end of the strip groove 18; a second pipe clamp 20 is slidably arranged on the back plate 17, and a rotating mechanism for driving the second pipe clamp 20 to rotate is also included; the axis of the first pipe clamp 19 is parallel to the long axis of the strip groove 18, the second pipe clamp 20 is directly opposite to the first pipe clamp 19, and the axis of the second pipe clamp 20 is always coplanar with the long axis of the strip groove 18; the welding station is located at one end of the strip groove 18 close to the first pipe clamp 19. A welding gun and its matching components can be arranged at the welding station to facilitate the operation of the welder.

[0038] The first pipe clamp 19 is installed on the first slider 21 , and the first slider 21 is slidably fitted on the first slide rail 22 . The first slide rail 22 is located at one end of the strip groove 18 , and the first slide rail 22 is parallel to the long axis of the strip groove 18 .

[0039] This embodiment further includes a first driving device for driving the first sliding block 21 to slide on the first sliding rail 22 .

[0040] A second slide rail 23 is provided on one side surface of the back plate 17 facing the strip groove 18 . The second slide rail 23 is parallel to the top surface of the platform 16 . A second slider 24 is slidably fitted on the second slide rail 23 . The second pipe clamp 20 is connected to the second slider 24 .

[0041] The rotating mechanism in this embodiment includes a motor 25 fixedly mounted on the second slider 24 , the output end of the motor 25 is connected to the mounting seat 26 , and the second pipe clamp 20 is arranged on the mounting seat 26 ; the rotating shaft of the output end of the motor 25 is perpendicular to the surface of the back plate 17 .

[0042] This embodiment further includes a second driving device for driving the second sliding block 24 to slide on the second sliding rail 23 .

[0043] In this embodiment, the first tube clamp 19 and the second tube clamp 20 can both be implemented using existing tube or bar clamps, preferably using chucks to facilitate adaptation to tubes of different diameters.

[0044] The first driving device and the second driving device in this embodiment can be implemented by any linear driving device in the prior art, preferably a cylinder, a linear motor or an electric push rod.

[0045] The motor 25 in this embodiment is preferably a servo motor or a stepper motor.

[0046] Example 2

[0047] A welding device for a gas extraction pipeline, based on Example 1, as Figure 1 and Figure 2 As shown, a lifting platform 27 is provided at one end of the bottom of the strip groove 18 near the direction where the first pipe clamp 19 is located; the lifting platform 27 is located below the second slide rail 23. A sensing device 28 for sensing the welded pipe is provided on the top of the lifting platform 27.

[0048] A lifting device 29 is provided at one end of the bottom of the strip groove 18 away from the first pipe clamp 19; a bearing member 30 is provided at the top of the lifting device 29. The top surface of the bearing member 30 is set as an arc surface, and the axis of the arc surface is parallel to the long axis of the strip groove 18.

[0049] In this embodiment, the lifting platform 27 and the lifting device 29 can be implemented by existing lifting equipment, and the sensing device 28 is preferably implemented by a pressure sensor, a distance sensor, or a camera.

[0050] Example 3

[0051] Based on the welding device in embodiment 1 or 2, it is used for welding such as Figure 3The gas extraction pipeline assembly shown in the figure comprises the following structure:

[0052] A flow guide pipe 1, a first outer pipe 2 fixedly sleeved outside the flow guide pipe 1, an annular gap 3 is provided between the inner wall of the first outer pipe 2 and the outer wall of the flow guide pipe 1, the annular gap 3 is sealed at both ends along the axial direction of the flow guide pipe 1, and the annular gap 3 is filled with gas adsorption material; and also includes a first gas concentration monitoring device 14 located in the annular gap 3. The first outer pipe 2 is coaxial with the flow guide pipe 1. A tube bottom 201 extending radially inward is provided at one end of the first outer pipe 2 facing the air extraction direction of the flow guide pipe 1, and a first through hole is provided on the tube bottom 201, and the aperture of the first through hole is equal to the outer diameter of the flow guide pipe 1. A first sealing ring 4 is welded outside the flow guide pipe 1; in the radial direction, the thickness of the first sealing ring 4 is equal to the thickness of the annular gap 3; the first sealing ring 4 is sealed and matched with the first outer pipe 2. The radial outer wall of the first sealing ring 4 is provided with an external thread, and the inner wall of the first outer tube 2 near the bottom 201 is provided with an internal thread section; the external thread and the internal thread section are mutually matching airtight threads; a first sealing ring 5 is provided on the end face of the first sealing ring 4 facing the bottom 201 of the tube. It also includes a second sealing ring 6 located in the annular gap 3; along the axial direction of the guide tube 1, the second sealing ring 6 is located at one end of the guide tube 1 in the exhaust direction; along the radial direction, the thickness of the second sealing ring 6 is equal to the thickness of the annular gap 3. The second sealing ring 6 is provided with a second sealing ring 7 and a third sealing ring 8 on the radial inner wall and outer wall respectively. The first gas concentration monitoring device 14 is installed on the second sealing ring 6 and is located at one end of the second sealing ring 6 facing the exhaust direction of the guide tube 1; the wire corresponding to the first gas concentration monitoring device 14 passes through the second sealing ring 6 and extends outward.

[0053] The process of welding the gas extraction pipeline assembly in this embodiment is as follows: Figure 4 As shown, the welding method specifically includes:

[0054] Step S1, move the first pipe clamp 19 to one end close to the strip groove 18, rotate the second pipe clamp 20 to be coaxial with the first pipe clamp 19, and pass the guide pipe 1 through the first pipe clamp 19 and the second pipe clamp 20; make the first pipe clamp 19 clamp the front end of the guide pipe 1; drive the lifting device 29 to rise, so that the bearing member 30 abuts against the bottom of the tail end of the guide pipe 1; at this time, the state is as follows Figure 4 As shown in the left picture in the upper middle row;

[0055] Step S2, move the second pipe clamp 20 to the front end of the guide pipe 1, and move the first pipe clamp 19 to the area away from the guide pipe 1; start the rotating mechanism, drive the second pipe clamp 20 to rotate, so that the tail end of the guide pipe 1 enters the strip groove 18 downward, and drive the lifting device 29 to descend during this process, and the descending rate is based on the premise of not interfering with the rotation of the guide pipe 1; when the guide pipe 1 rotates to a vertical state, determine whether the guide pipe 1 is directly above the lifting platform 27, if not, move the second pipe clamp 20 to make the guide pipe 1 directly above the lifting platform 27; raise the lifting platform 27 until the lifting platform 27 abuts against the bottom of the guide pipe 1 at this time; at this time, the state is as follows Figure 4 As shown in the middle picture in the upper middle row;

[0056] Step S3, put the first sealing ring 4 on the top of the guide tube 1 at this time, and weld the first sealing ring 4 to the outside of the guide tube 1; loosen the clamping of the second tube clamp 20, screw in the first outer tube 2 from top to bottom, so that the first outer tube 2 and the first sealing ring 4 are threadedly connected until the first sealing ring 4 abuts against the tube bottom 201, and use the second tube clamp 20 to clamp the first outer tube 2; weld the tube bottom 201 and the guide tube 1; the state at this time is as follows Figure 4 As shown in the picture on the right in the upper middle row;

[0057] Step S4, the lifting platform 27 is lowered and reset, the rotating mechanism is started, and the second pipe clamp 20 is driven to rotate, so that the guide tube 1 and the first outer tube 2 gradually leave the strip groove 18 and return to the horizontal state; in this process, when the first outer tube 2 or the guide tube 1 arrives above the lifting device 29, the lifting device 29 is synchronously lifted up by the first outer tube 2 or the guide tube 1 until the second pipe clamp 20 is reset to be coaxial with the first pipe clamp 19; then the first pipe clamp 19 is moved to the end close to the strip groove 18, so that the first pipe clamp 19 re-clamps the front end of the guide tube 1; at this time, the state is as follows Figure 4 As shown in the right picture in the lower middle row;

[0058] Step S5, move the second pipe clamp 20 to the tail end close to the first outer pipe 2, and move the first pipe clamp 19 to the area away from the guide pipe 1; start the rotating mechanism and drive the second pipe clamp 20 to rotate, so that the front end of the first outer pipe 2 enters the strip groove 18 downward; when the first outer pipe 2 rotates to a vertical state, the front end of the first outer pipe 2 faces downward and the tail end faces upward; move the second pipe clamp 20 so that the guide pipe 1 is located directly above the lifting platform 27; raise the lifting platform 27 until the lifting platform 27 abuts against the bottom of the guide pipe 1 at this time; fill the gas adsorption material into the annular gap 3 from top to bottom; at this time, the state is as follows Figure 4 As shown in the middle picture in the lower middle row;

[0059] Step S6, install the second sealing ring 6 from the top into the annular gap 3, and weld the second sealing ring 6 to the guide tube 1 and the first outer tube 2; at this time, the state is as follows: Figure 4As shown in the left figure in the lower middle row. At this point, the required welding work is completed, and the overall structure including the guide tube 1, the first outer tube 2, the first sealing ring 4 and the second sealing ring 6 and the gas adsorption material inside can be taken out. Of course, the removal process can also be driven by the second pipe clamp 20 to rotate so that the overall structure leaves the strip groove to a horizontal state; during the rotation process, it can also be synchronously lifted by the lifting device 29.

[0060] Those skilled in the art should understand that the front end in the present application refers to the end of the guiding flow tube 1 and the first outer tube 2 facing the depth of the coal seam when working, that is, the end facing the direction of gas extraction; the tail end in the present application refers to the end of the guiding flow tube 1 and the first outer tube 2 facing the outside of the coal seam when working, that is, the end facing the direction of exhaust.

[0061] Example 4

[0062] A method for installing a gas extraction pipeline assembly for a coal mine is used to install the gas extraction pipeline assembly as described in Example 3.

[0063] like Figure 5 As shown, this embodiment also includes a second outer tube 9 for sleeved outside the first outer tube 2, the inner diameter of the second outer tube 9 is equal to the outer diameter of the first outer tube 2; an anti-overflow component is arranged at one end of the second outer tube 9 facing the air extraction direction of the flow guide tube 1. The second outer tube 9 is coaxial with the first outer tube 2.

[0064] The overflow prevention component in this embodiment includes a partition 10 arranged inside the second outer tube 9, and the partition 10 divides the second outer tube 9 axially into a first area 901 close to the suction direction of the guide tube 1 and a second area 902 close to the exhaust direction of the guide tube 1; a second through hole is opened on the partition 10, and the aperture of the second through hole is equal to the outer diameter of the guide tube 1, and a limit member 11 that cannot pass through the second through hole is set on the outer wall of the guide tube 1, and the limit member 11 is located in the second area 902; it also includes a baffle 12 hinged on the surface of the partition 10 facing the first area 901, and a torsion spring 13 for driving the baffle 12 to block the second through hole; when the limit member 11 abuts against the partition 10, the guide tube 1 pushes open the baffle 12.

[0065] In this embodiment, the baffle 12 is connected to the partition 10 via a rotating shaft, and the torsion spring 13 acts on the rotating shaft.

[0066] Preferably, it further includes a second gas concentration monitoring device 15 located in the second area 902 ; when the limiting member 11 abuts against the partition 10 , the second gas concentration monitoring device 15 is located between the partition 10 and the first outer tube 2 .

[0067] Preferably, a wiring groove is provided on the inner wall or inside of the second outer tube 9, and the wire corresponding to the second gas concentration monitoring device 15 passes through the wiring groove and extends outward.

[0068] The installation method of this embodiment includes the following steps:

[0069] S1. Obtain a gas drainage pipeline assembly using the method in Example 3, and obtain Figure 3 The structure shown;

[0070] S2. A hole matching the second outer tube 9 is opened on the inner wall of the mine, the second outer tube 9 is inserted into the hole, and an existing plugging device is used to plug the outer end of the second outer tube 9 and the hole wall of the hole;

[0071] S3, such as Figure 5 As shown, the overall structure is inserted into the second outer tube 9 until the stopper 11 abuts against the surface of the partition 10 .

[0072] The blocking device in this embodiment may be an annular plug or other components that can play a temporary blocking role.

[0073] In a more preferred embodiment: before inserting the second outer tube 9 into the hole, a layer of curing agent is coated on the outer wall of the second outer tube 9, and / or after inserting the second outer tube 9 into the hole, the curing agent is squeezed between the second outer tube 9 and the hole wall. The curing agent can be realized by cement mortar.

[0074] In a more preferred embodiment, after the stopper 11 abuts against the surface of the partition 10, the first outer tube 2 and the second outer tube 9 are temporarily fixed. For example, at the ends of the first outer tube 2 and the second outer tube 9 facing the exhaust direction of the air guide tube 1, temporary fixation is achieved by means of a lock, a buckle or a magnetic attraction to prevent the first outer tube 2 from rotating or retreating.

[0075] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0076] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In addition, the term "connected" used in this article can be directly connected or indirectly connected via other components without special explanation.

Claims

1. A welding method for a gas extraction pipeline, characterized in that: including welding equipment; The welding device comprises: It also includes a platform (16) and a back plate (17) extending above the platform (16); a strip groove (18) is provided on the top surface of the platform (16); a first pipe clamp (19) is arranged on the platform (16) and is located at one end of the strip groove (18); a second pipe clamp (20) is slidably arranged on the back plate (17), and also includes a rotating mechanism for driving the second pipe clamp (20) to rotate; the axis of the first pipe clamp (19) is parallel to the long axis of the strip groove (18), the second pipe clamp (20) is directly opposite to the first pipe clamp (19), and the axis of the second pipe clamp (20) is always coplanar with the long axis of the strip groove (18); the welding station is located at one end of the strip groove (18) close to the first pipe clamp (19); A second slide rail (23) is provided on a side surface of the back plate (17) facing the direction of the strip groove (18); the second slide rail (23) is parallel to the top surface of the platform (16); a second slide block (24) is slidably matched on the second slide rail (23); and the second pipe clamp (20) is connected to the second slide block (24); A lifting platform (27) is provided at one end of the bottom of the strip groove (18) close to the direction where the first pipe clamp (19) is located; the lifting platform (27) is located below the second slide rail (23); A lifting device (29) is provided at one end of the bottom of the strip groove (18) away from the direction where the first pipe clamp (19) is located; a bearing member (30) is provided at the top end of the lifting device (29); The welding method comprises: Step S1, moving the first tube clamp (19) to one end close to the strip groove (18), rotating the second tube clamp (20) to be coaxial with the first tube clamp (19), passing the guide tube (1) through the first tube clamp (19) and the second tube clamp (20); making the first tube clamp (19) clamp the front end of the guide tube (1); driving the lifting device (29) to rise, so that the bearing member (30) abuts against the bottom of the rear end of the guide tube (1); Step S2, moving the second tube clamp (20) to a position close to the front end of the guide tube (1), and moving the first tube clamp (19) to a region away from the guide tube (1); starting the rotating mechanism, driving the second tube clamp (20) to rotate, so that the tail end of the guide tube (1) enters downward into the strip groove (18), and driving the lifting device (29) to descend during this process, with the descending rate being based on the premise of not interfering with the rotation of the guide tube (1); when the guide tube (1) rotates to a vertical state, determining whether the guide tube (1) is directly above the lifting platform (27); if not, moving the second tube clamp (20) so that the guide tube (1) is directly above the lifting platform (27); raising the lifting platform (27) until the lifting platform (27) abuts against the bottom of the guide tube (1) at this time; Step S3, putting a first sealing ring (4) on the top of the flow guide tube (1) and welding the first sealing ring (4) to the outside of the flow guide tube (1); loosening the clamping of the second tube clamp (20), screwing the first outer tube (2) from top to bottom, so that the first outer tube (2) and the first sealing ring (4) are threadedly connected until the first sealing ring (4) abuts against the tube bottom (201), and clamping the first outer tube (2) with the second tube clamp (20); welding the tube bottom (201) and the flow guide tube (1); Step S4, the lifting platform (27) is lowered and reset, the rotating mechanism is started, and the second tube clamp (20) is driven to rotate, so that the guide tube (1) and the first outer tube (2) gradually leave the strip groove (18) and return to the horizontal state; during this process, when the first outer tube (2) or the guide tube (1) reaches the top of the lifting device (29), the lifting device (29) is synchronously lifted up the first outer tube (2) or the guide tube (1) until the second tube clamp (20) is reset to be coaxial with the first tube clamp (19); then the first tube clamp (19) is moved to the end close to the strip groove (18), so that the first tube clamp (19) re-clamps the front end of the guide tube (1); Step S5, moving the second tube clamp (20) to a position close to the tail end of the first outer tube (2), and moving the first tube clamp (19) to a region away from the guide tube (1); starting the rotating mechanism, driving the second tube clamp (20) to rotate, so that the front end of the first outer tube (2) enters downward into the strip groove (18); when the first outer tube (2) rotates to a vertical state, the front end of the first outer tube (2) faces downward and the tail end faces upward; moving the second tube clamp (20) so that the guide tube (1) is located directly above the lifting platform (27); raising the lifting platform (27) until the lifting platform (27) abuts against the bottom of the guide tube (1); and filling the annular gap (3) with gas adsorption material from top to bottom; Step S6: installing the second sealing ring (6) from the top end into the annular gap (3), and welding the second sealing ring (6) to the flow guide tube (1) and the first outer tube (2).

2. A welding method for a gas extraction pipeline according to claim 1, characterized in that: The first pipe clamp (19) is mounted on a first slide block (21), the first slide block (21) is slidably engaged on a first slide rail (22), the first slide rail (22) is located at one end of the strip groove (18), and the first slide rail (22) is parallel to the long axis of the strip groove (18).

3. A welding method for a gas extraction pipeline according to claim 2, characterized in that: It also includes a first driving device for driving the first sliding block (21) to slide on the first sliding rail (22).

4. A welding method for a gas extraction pipeline according to claim 1, characterized in that: The rotating mechanism comprises a motor (25) fixedly mounted on the second sliding block (24); the output end of the motor (25) is connected to a mounting seat (26); the second pipe clamp (20) is arranged on the mounting seat (26); and the rotating shaft of the output end of the motor (25) is perpendicular to the surface of the back plate (17).

5. A welding method for a gas extraction pipeline according to claim 1, characterized in that: It also includes a second driving device for driving the second sliding block (24) to slide on the second sliding rail (23).

6. A welding method for a gas extraction pipeline according to claim 5, characterized in that: A sensing device (28) for sensing the welded pipe is arranged on the top of the lifting platform (27).

7. A welding method for a gas extraction pipeline according to claim 6, characterized in that: The top surface of the bearing member (30) is configured as a curved surface, and the axis of the curved surface is parallel to the long axis of the strip-shaped groove (18).

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