A gas extraction pipe docking structure facilitating sealing

Abstract

This invention discloses a gas extractor with a pipe connection structure that facilitates sealing, comprising: an extraction pipe serving as the supporting base of the device, one end of which has an annular groove, and the other end of which is fixedly connected to an annular insert plate; a placement cavity formed on the inner wall of the annular groove, with a first spring fixedly connected to the bottom surface inside the placement cavity, and a slot formed on the inner side wall of the annular insert plate. This gas extractor employs a pipe connection structure that facilitates sealing. The first spring pushes the insert rod to reset and insert it into the slot, fixing one end of the extraction pipe to one end of another set of extraction pipes, thus facilitating connection and heat preservation. Rotating the screw drives the internally threaded pipe, causing the annular scraper to move along the inner wall of the extraction pipe, facilitating cleaning. Rotating the threaded rod pushes the arc-shaped plate to move, allowing the sealing gasket to reach the port connection point. The two sets of sealing gaskets form a complete sealing ring, thus facilitating sealing.

Description

Technical Field

[0001] This invention relates to the field of gas extraction technology, specifically to a gas extraction pipeline connection structure that facilitates sealing. Background Technology

[0002] Gas extraction involves drilling into coal seams and gas accumulation areas, connecting the boreholes to dedicated pipelines, and using extraction equipment to extract the gas from the coal seams and goaf to the surface for utilization or discharge into the main return airflow. Gas extraction requires the use of pipelines to transport gas, but existing gas extraction pipelines still have certain defects in use, such as...

[0003] For example, in the closed-loop coal mine gas extraction pipeline system disclosed in CN209670998U, the gas collecting pipe and the in-hole extraction pipe are connected by a hexagonal pagoda-type toothed joint and a toothed joint with a nut, which makes the pipeline connection extremely airtight and eliminates the gas leakage that is easy to occur in general pipeline connections. The whole pipeline device is beautiful and elegant, changing the dirty and messy appearance of coal mines and providing strong support for the creation of coal mine lighting projects.

[0004] The existing technical solution still has the following problems when used:

[0005] 1. It is inconvenient to seal at the joint;

[0006] 2. Inconvenient connection;

[0007] 3. Not good for heat preservation;

[0008] 4. Poor protective effect;

[0009] 5. Difficult to clean the inner walls;

[0010] Therefore, improvements are needed to address the aforementioned issues. Summary of the Invention

[0011] The purpose of this invention is to provide a gas extraction pipeline connection structure that facilitates sealing, thereby solving the problems mentioned in the background art regarding the current gas extraction pipelines on the market, such as difficulty in sealing the connection points, inconvenient connection, difficulty in heat preservation, poor protective effect, and difficulty in cleaning the inner wall.

[0012] To achieve the above objectives, the present invention provides the following technical solution: a gas extraction system employing a pipe connection structure that facilitates sealing, comprising:

[0013] The extraction pipe serves as the supporting foundation for the device. One end of the extraction pipe has an annular groove, and the other end of the extraction pipe is fixedly connected to an annular insert plate.

[0014] A placement cavity is formed on the inner wall of the annular groove. A first spring is fixedly connected to the bottom surface inside the placement cavity. A baffle is fixedly connected to one end of the first spring. An insertion rod is fixedly connected above the baffle. The insertion rod is set in a slot. The slot is formed on the inner side wall of the annular insertion plate.

[0015] Preferably, the placement cavity, the first spring, the baffle, and the insertion rod are arranged in a circular array about the center of the annular groove in four groups, and the sum of the lengths of the first spring, the baffle, and the insertion rod is much greater than the internal depth of the placement cavity, and the length of the insertion rod is greater than the internal depth of the slot. The insertion rod is pushed back to its original position by the first spring and inserted into the slot, fixing one end of the extraction tube to one end of another group of extraction tubes, thereby facilitating docking.

[0016] Preferably, the extraction tube comprises:

[0017] A docking plate is fixedly connected to the outside of the extraction pipe. A sliding plate is fixedly connected above the docking plate. The sliding plate is slidably connected to the slide rail. The slide rail is fixedly connected to the upper part of the inner wall of the docking groove. The docking groove is opened on the inner side wall of the first insulation pipe.

[0018] A limiting cavity is formed on one side of the docking plate. A protrusion is engaged and connected inside the limiting cavity. A first glass tube is fixedly connected to the outside of the first insulation tube. A support rod is connected to the first glass tube. A second glass tube is fixedly connected to one end of the support rod. A second insulation tube is fixedly connected to the outside of the second glass tube. The first and second insulation tubes can effectively insulate heat and prevent heat loss from the inside of the extraction tube, thus facilitating heat preservation.

[0019] Preferably, the protrusion is made of rubber, and the cross-sectional area of ​​the protrusion is slightly larger than the cross-sectional area of ​​the limiting cavity. The space between the first glass tube and the second glass tube is a vacuum state. In a vacuum state, there is no medium for heat transfer, which can improve the heat preservation effect.

[0020] Preferably, the second insulation pipe includes:

[0021] A protective tube is fixedly connected to the outside of the second insulation tube. An annular cavity is formed inside the protective tube. A support frame is fixedly connected to the inner wall of the annular cavity. A first rotating shaft is rotatably connected inside the support frame. A connecting rod is connected to one end of the first rotating shaft. A slider is fixedly connected to one end of the connecting rod. The slider is engaged with an annular rail. The annular rail is fixedly connected to the bottom surface inside the annular cavity. A second spring is fixedly connected to one side of the slider. By moving the two sets of sliders towards each other along the annular rail, the second spring is stretched, buffering the impact force and thus improving the protective effect.

[0022] Preferably, the first rotating shaft, connecting rod, slider and second spring are symmetrically arranged in two sets about the central axis of the support frame, and the two sets of sliders are connected by the second spring, so that when the two sets of sliders slide along the circular rail, the second spring can be stretched and the impact force is converted into elastic potential energy for storage.

[0023] Preferably, the extraction tube further includes:

[0024] A chute is formed on the inner wall of the extraction pipe. A locking block is engaged within the chute. An annular scraper is fixedly connected to one side of the locking block. A support rod is fixedly connected to the inner wall of the annular scraper. One end of the support rod is fixedly connected to an internally threaded pipe. A lead screw is internally threaded into the internally threaded pipe. One end of the lead screw is rotatably connected to a perforated plate. The perforated plate is fixedly connected inside the extraction pipe. By rotating the lead screw, the internally threaded pipe is driven, causing the annular scraper to move along the inner wall of the extraction pipe, thus facilitating cleaning.

[0025] Preferably, both ends of the support rod are fixedly connected to the annular scraper and the internally threaded pipe by welding, and the diameter of the annular scraper is equal to the inner diameter of the extraction pipe, to prevent the support rod from easily separating from the annular scraper or the internally threaded pipe under stress, thereby improving structural stability.

[0026] Preferably, the protective tube comprises:

[0027] A through groove is formed on the outer wall of the protective pipe. A bearing seat is fixedly connected to the through groove, and a second rotating shaft is connected to the bearing seat. A threaded rod is fixedly connected to one end of the second rotating shaft, and a push plate is threadedly connected to the threaded rod. An arc-shaped plate is fixedly connected to the push plate, and a sealing gasket is fixedly connected to the inner side of the arc-shaped plate. A limit block is fixedly connected above the push plate and is slidably connected in a limit groove, which is formed on the inner wall of the through groove. By rotating the threaded rod, the arc-shaped plate is moved so that the sealing gasket reaches the port mating point. The two sets of sealing gaskets form a complete sealing ring, thereby facilitating sealing.

[0028] Preferably, the through groove, bearing seat, second rotating shaft, threaded rod, push plate, arc plate and sealing gasket are provided on both sides of the protective tube, and the radius of the two sets of sealing gaskets is equal to the diameter of the extraction tube. The sealing gasket is made of rubber so that the sealing gasket can return to its original shape when it reaches the port and seal the gap at the port.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows: The gas extraction pipe adopts a pipe docking structure that facilitates sealing. The first spring pushes the insertion rod to reset and insert it into the slot, fixing one end of the extraction pipe to one end of another set of extraction pipes, thus facilitating docking. The first and second insulation pipes can effectively isolate heat and prevent heat loss from the inside of the extraction pipe, thus facilitating heat preservation. The two sets of sliders move towards each other along the annular track, stretching the second spring and buffering the impact force, thus improving the protection effect. By rotating the screw, the internal threaded pipe is driven, causing the annular scraper to move along the inner wall of the extraction pipe, thus facilitating cleaning. By rotating the threaded rod, the arc plate is moved, allowing the sealing gasket to reach the port docking point. The two sets of sealing gaskets form a complete sealing ring, thus facilitating sealing.

[0030] 1. After the extraction pipes are connected, the second rotating shaft is rotated through the bearing seat. The second rotating shaft drives the threaded rod to rotate. Since the push plate is slidably connected in the limiting groove through the limiting block, and the push plate and the threaded rod rotate together, when the threaded rod rotates, the push plate can move along the through groove, thereby pushing the arc plate to move. When the arc plate moves to the docking point of the two sets of extraction pipes, the sealing gasket returns to its original shape and fits against the docking point of the extraction pipes. At the same time, the other set of sealing gaskets is pushed to the docking point of the extraction pipes. At this time, the two sets of sealing gaskets contact each other and form a complete sealing ring, thereby sealing the docking point of the two sets of extraction pipes.

[0031] 2. First, align the annular insert plate at one end of the extraction tube with the annular groove at one end of another set of extraction tubes. Then, insert the annular insert plate into the annular groove. When the annular insert plate reaches the insertion rod and continues to move into the annular groove, it will squeeze the insertion rod. The insertion rod moves into the placement cavity through the baffle and squeezes the first spring. When the annular insert plate is fully inserted into the annular groove, the insertion rod and the slot are in the same position. The first spring is no longer squeezed and quickly returns to its original state, pushing the insertion rod on the baffle to insert into the slot. By inserting the four sets of insertion rods into the slot, the annular insert plate is fixed in the annular groove, which facilitates the docking of two or more sets of extraction tubes.

[0032] 3. First, align the docking plate on the outside of the extraction pipe with the docking grooves on the inner wall of the first insulation pipe. Then, from left to right, insert the first insulation pipe into the extraction pipe. During the insertion process, the sliding plates on the upper and lower sides of the docking plate slide into the slide rail, restricting the docking plate and making the docking plate more stable. During the sliding process, the docking plate presses against the protrusion on one side. When the first insulation pipe is completely fitted onto the extraction pipe, the position of the protrusion coincides with the limiting cavity. At this time, the protrusion returns to its original shape and is inserted into the limiting cavity, fixing the position of the first insulation pipe. Then, the first insulation pipe is installed on the extraction pipe. The first and second insulation pipes can effectively isolate external heat and prevent internal heat from escaping, thus facilitating heat preservation. Moreover, the space between the first and second glass tubes is a vacuum state. In a vacuum state, there is no medium for heat transfer, which can further improve the heat preservation effect.

[0033] 4. When the extraction pipe is impacted, its outer protective pipe will deform. When the protective pipe deforms, it will push the support frame to move. At the same time, the support frame moves and the two sets of connecting rods rotate in opposite directions through the two sets of first rotating shafts. As the two sets of connecting rods rotate, they drive the two sets of sliders to move in opposite directions along the circular track, converting the impact force into frictional force. At the same time, the second spring between the two sets of sliders is stretched, converting the impact force into stored elastic potential energy. When the second spring is stretched to a certain extent, it drives the two sets of sliders to reset along the circular track. During the process of the sliders resetting along the circular track, frictional force is continuously generated, which attenuates the elastic potential energy stored in the second spring, thereby buffering the impact force and improving the protection effect.

[0034] 5. When cleaning is required, rotate the lead screw. As the lead screw rotates, due to the action of the outer sliding groove and the locking block, it cannot drive the inner threaded pipe to rotate with its own rotation. This causes the annular scraper to slide stably along the sliding groove through the locking block, so that the annular scraper continuously passes over the inner wall of the extraction pipe, thereby scraping off the material adhering to the inner wall of the extraction pipe. The perforated plate will not affect the operation of the extraction pipe in extracting methane gas. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of the present invention;

[0036] Figure 2 This is a schematic diagram of the protective tube structure of the present invention;

[0037] Figure 3 This is a schematic diagram of the cavity structure of the present invention;

[0038] Figure 4 This is an enlarged view of the structure of part A of the present invention;

[0039] Figure 5 This is an enlarged view of part B of the present invention;

[0040] Figure 6 This is an enlarged view of the structure of part C of the present invention.

[0041] In the diagram: 1. Extraction pipe; 2. Annular groove; 3. Annular insert plate; 4. Placement cavity; 5. First spring; 6. Baffle; 7. Insert rod; 8. Slot; 9. Connecting plate; 10. Slide plate; 11. Slide rail; 12. Connecting groove; 13. Limiting cavity; 14. Protrusion; 15. First insulation pipe; 16. First glass tube; 17. Support rod; 18. Second glass tube; 19. Second insulation pipe; 20. Protective pipe; 21. Annular cavity; 22. Support rod. 24. Support frame; 25. First rotating shaft; 26. Connecting rod; 27. Slider; 28. Circular rail; 29. ​​Second spring; 20. Slide groove; 31. Locking block; 32. Circular scraper; 33. Support rod; 34. Internal threaded tube; 35. Lead screw; 36. Hollow plate; 37. Through groove; 38. Bearing seat; 39. Second rotating shaft; 40. Threaded rod; 41. Push plate; 42. Arc plate; 43. Sealing gasket; 44. Limiting block; 45. Limiting groove. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Please see Figure 1-6 The present invention provides a technical solution: a gas extraction pipe with a pipe connection structure that facilitates sealing, comprising: an extraction pipe 1, which serves as the supporting base of the device; an annular groove 2 is provided at one end of the extraction pipe 1; an annular insert plate 3 is fixedly connected to the other end of the extraction pipe 1; a placement cavity 4 is provided on the inner wall of the annular groove 2; a first spring 5 is fixedly connected to the bottom surface inside the placement cavity 4; a baffle 6 is fixedly connected to one end of the first spring 5; an insert rod 7 is fixedly connected above the baffle 6; the insert rod 7 is disposed in a slot 8; and the slot 8 is provided on the inner side wall of the annular insert plate 3.

[0044] The placement cavity 4, the first spring 5, the baffle 6, and the insertion rod 7 are arranged in a circular array about the center of the annular groove 2 in four groups. The sum of the lengths of the first spring 5, the baffle 6, and the insertion rod 7 is much greater than the internal depth of the placement cavity 4, and the length of the insertion rod 7 is greater than the internal depth of the slot 8. The insertion rod 7 is pushed back to its original position by the first spring 5 and inserted into the slot 8, fixing one end of the extraction tube 1 to one end of another set of extraction tubes 1, thereby facilitating docking.

[0045] The extraction tube 1 includes: a docking plate 9, fixedly connected to the outside of the extraction tube 1; a sliding plate 10 fixedly connected above the docking plate 9, the sliding plate 10 slidably connected within a slide rail 11, the slide rail 11 fixedly connected above the inner wall of the docking groove 12, the docking groove 12 being formed on the inner side wall of the first insulation tube 15; a limiting cavity 13, formed on one side of the docking plate 9; a protrusion 14 engaging within the limiting cavity 13; a first glass tube 16 fixedly connected to the outside of the first insulation tube 15; a support rod 17 connected to the first glass tube 16; a second glass tube 18 fixedly connected to one end of the support rod 17; and a second insulation tube 19 fixedly connected to the outside of the second glass tube 18. The protrusion 14 is made of rubber, and its cross-sectional area is slightly larger than that of the limiting cavity 13. A vacuum exists between the first glass tube 16 and the second glass tube 18, where there is no heat transfer medium, thus improving the insulation effect. The first insulation pipe 15 and the second insulation pipe 19 can effectively insulate heat and prevent heat loss from the inside of the extraction pipe 1, thus facilitating heat preservation.

[0046] The second insulation pipe 19 includes: a protective pipe 20, fixedly connected to the outside of the second insulation pipe 19; an annular cavity 21 is formed inside the protective pipe 20; a support frame 22 is fixedly connected to the inner wall of the annular cavity 21; a first rotating shaft 24 is rotatably connected inside the support frame 22; a connecting rod 25 is connected to one end of the first rotating shaft 24; a slider 26 is fixedly connected to one end of the connecting rod 25; the slider 26 is engaged within an annular rail 27; the annular rail 27 is fixedly connected to the bottom surface inside the annular cavity 21; and a second spring 28 is fixedly connected to one side of the slider 26. Two sets of the first rotating shaft 24, connecting rod 25, slider 26, and second spring 28 are symmetrically arranged about the central axis of the support frame 22, and the two sets of sliders 26 are connected by the second spring 28. When the two sets of sliders 26 slide along the annular rail 27, they can stretch the second spring 28, converting the impact force into stored elastic potential energy. By moving the two sets of sliders 26 towards each other along the annular rail 27, stretching the second spring 28, the impact force is buffered, thereby improving the protective effect.

[0047] The extraction pipe 1 also includes: a groove 29, formed on the inner wall of the extraction pipe 1; a locking block 30 is engaged within the groove 29; an annular scraper 31 is fixedly connected to one side of the locking block 30; a support rod 32 is fixedly connected to the inner wall of the annular scraper 31; an internally threaded tube 33 is fixedly connected to one end of the support rod 32; a screw 34 is internally threaded into the internally threaded tube 33; one end of the screw 34 is rotatably connected to a perforated plate 35; and the perforated plate 35 is fixedly connected inside the extraction pipe 1. Both ends of the support rod 32 are fixedly connected to the annular scraper 31 and the internally threaded tube 33 by welding, and the diameter of the annular scraper 31 is equal to the diameter of the inner wall of the extraction pipe 1, to prevent the support rod 32 from easily separating from the annular scraper 31 or the internally threaded tube 33 under stress, thus improving structural stability. By rotating the screw 34, the internally threaded tube 33 is driven, causing the annular scraper 31 to move along the inner wall of the extraction pipe 1, thereby facilitating cleaning.

[0048] The protective tube 20 includes: a through groove 36, which is opened on the outer wall of the protective tube 20; a bearing seat 37 is fixedly connected in the through groove 36; a second rotating shaft 38 is connected in the bearing seat 37; a threaded rod 39 is fixedly connected to one end of the second rotating shaft 38; a push plate 40 is threadedly connected to the threaded rod 39; an arc plate 41 is fixedly connected to the push plate 40; a sealing gasket 42 is fixedly connected to the inner side of the arc plate 41; a limiting block 43 is fixedly connected above the push plate 40; the limiting block 43 is slidably connected in a limiting groove 44, which is opened on the inner wall of the through groove 36. A set of through groove 36, bearing seat 37, second rotating shaft 38, threaded rod 39, push plate 40, arc plate 41, and sealing gasket 42 are provided on each side of the protective pipe 20. The radius of the two sets of sealing gaskets 42 is equal to the diameter of the extraction pipe 1, and the material of the sealing gaskets 42 is rubber, so that the sealing gaskets 42 can return to their original shape when they reach the port, thus sealing the gap at the port. By rotating the threaded rod 39, the arc plate 41 is moved, so that the sealing gaskets 42 reach the port mating point, and the two sets of sealing gaskets 42 form a complete sealing ring, thereby facilitating sealing.

[0049] Working principle: such as Figure 1-6As shown, when using this gas extraction pipe with a pipe connection structure that facilitates sealing, a simple understanding of this device is provided. First, align the connecting plate 9 on the outer side of the extraction pipe 1 with the connecting groove 12 on the inner side wall of the first insulation pipe 15. Then, from left to right, insert the first insulation pipe 15 into the extraction pipe 1. During the insertion process, the sliding plates 10 on the upper and lower sides of the connecting plate 9 slide into the slide rail 11, restricting the connecting plate 9 and making the connection more stable. During the sliding process, the connecting plate 9 presses against the protrusion 14 on one side. When the first insulation pipe 15 is completely fitted onto the extraction pipe 1, the position of the protrusion 14 coincides with the limiting cavity 13. At this time, the protrusion 14 returns to its original shape and is locked into the limiting cavity 13, fixing the position of the first insulation pipe 15, thereby securing the first insulation pipe 15. The insulation pipe 15 is installed on the extraction pipe 1. The first insulation pipe 15 and the second insulation pipe 19 can effectively isolate external heat and prevent internal heat from escaping, thus facilitating heat preservation. Furthermore, the space between the first glass tube 16 and the second glass tube 18 is in a vacuum state. In a vacuum state, there is no medium for heat transfer, which can further improve the heat preservation effect. Next, the annular insert plate 3 at one end of the extraction pipe 1 is aligned with the annular groove 2 at one end of another set of extraction pipes 1. Then, the annular insert plate 3 is inserted into the annular groove 2. When the annular insert plate 3 reaches the insertion rod 7 and continues to move into the annular groove 2, it will squeeze the insertion rod 7. The insertion rod 7 moves into the placement cavity 4 through the baffle 6 and squeezes the first spring 5. When the annular insert plate 3 is fully inserted into the annular groove 2, the insertion rod 7 and the slot 8 are in the same position. The first spring 5, no longer compressed, quickly returns to its original state, pushing the insert rod 7 on the baffle 6 into the slot 8. With four sets of insert rods 7 inserted into the slot 8, the annular insert plate 3 is fixed in the annular groove 2, facilitating the docking of two or more sets of extraction tubes 1. Then, after the extraction tubes 1 are docked, the second rotating shaft 38 is rotated via the bearing seat 37. The second rotating shaft 38 drives the threaded rod 39 to rotate. Since the push plate 40 is slidably connected to the limiting groove 44 via the limiting block 43, and the push plate 40 rotates threadedly with the threaded rod 39, when the threaded rod 39 rotates, the push plate 40 can move along the through groove 36, thereby pushing the arc plate 41 to move. When the arc plate 41 moves to the docking point of the two sets of extraction tubes 1, the sealing gasket 42 returns to its original state and docks with the end of the extraction tube 1. The two sets of sealing gaskets 42 are then pushed to the joint of the extraction tube 1 ends. At this point, the two sets of sealing gaskets 42 come into contact, forming a complete sealing ring, which seals the joint of the two extraction tubes 1 ends. Then, when the extraction tube 1 is impacted, its outer protective tube 20 will deform. When the protective tube 20 deforms, it will push the support frame 22 to move. As the support frame 22 moves, it causes the two sets of connecting rods 25 to rotate in opposite directions through the two sets of first rotating shafts 24. While the two sets of connecting rods 25 are rotating, they drive the two sets of sliders 26 to move in opposite directions along the annular track 27, converting the impact force into frictional force. At the same time, it stretches the second spring 28 between the two sets of sliders 26, converting the impact force into elastic potential energy storage. When the second spring 28 is stretched to a certain extent...The two sets of sliders 26 are driven to reset along the annular rail 27. During this reset process, friction is continuously generated, attenuating the elastic potential energy stored in the second spring 28, thus buffering the impact force and improving the protective effect. Finally, when cleaning is required, the lead screw 34 is rotated. During rotation, due to the action of the outer sliding groove 29 and the locking block 30, the lead screw 34 cannot drive the internal threaded tube 33 to rotate with it. This causes the annular scraper 31 to slide stably along the sliding groove 29 via the locking block 30, allowing the annular scraper 31 to continuously pass over the inner wall of the extraction pipe 1, scraping off the material adhering to the inner wall of the extraction pipe 1. Furthermore, the perforated plate 35 does not affect the extraction of methane gas by the extraction pipe 1. Content not described in detail in this specification belongs to prior art known to those skilled in the art.

[0050] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A gas extraction system employing a pipe connection structure that facilitates sealing, characterized in that, include: A sampling pipe (1) is provided with an annular groove (2) at one end and an annular insert plate (3) is fixedly connected to the other end of the sampling pipe (1). Placement cavity (4) is opened on the inner wall of the annular groove (2). A first spring (5) is fixedly connected to the bottom surface inside the placement cavity (4). A baffle (6) is fixedly connected to one end of the first spring (5). A plug rod (7) is fixedly connected above the baffle (6). The plug rod (7) is set in the slot (8). The slot (8) is opened on the inner side wall of the annular plug plate (3). The extraction tube (1) includes: A docking plate (9) is fixedly connected to the outside of the extraction pipe (1). A sliding plate (10) is fixedly connected above the docking plate (9). The sliding plate (10) is slidably connected to the slide rail (11). The slide rail (11) is fixedly connected to the upper part of the inner wall of the docking groove (12). The docking groove (12) is opened on the inner side wall of the first insulation pipe (15). A limiting cavity (13) is opened on one side of the docking plate (9). A protrusion (14) is engaged in the limiting cavity (13). A first glass tube (16) is fixedly connected to the outside of the first heat-insulating tube (15). A support rod (17) is connected to the first glass tube (16). A second glass tube (18) is fixedly connected to one end of the support rod (17). A second heat-insulating tube (19) is fixedly connected to the outside of the second glass tube (18). The second insulation pipe (19) includes: A protective tube (20) is fixedly connected to the outside of the second insulation tube (19). An annular cavity (21) is opened inside the protective tube (20). A support frame (22) is fixedly connected to the inner wall of the annular cavity (21). A first rotating shaft (24) is rotatably connected inside the support frame (22). A connecting rod (25) is connected to one end of the first rotating shaft (24). A slider (26) is fixedly connected to one end of the connecting rod (25). The slider (26) is engaged in the annular rail (27). The annular rail (27) is fixedly connected to the bottom surface inside the annular cavity (21). A second spring (28) is fixedly connected to one side of the slider (26). The protective tube (20) includes: A through groove (36) is formed on the outer wall of the protective pipe (20). A bearing seat (37) is fixedly connected in the through groove (36). A second rotating shaft (38) is connected in the bearing seat (37). A threaded rod (39) is fixedly connected to one end of the second rotating shaft (38). A push plate (40) is threadedly connected to the threaded rod (39). An arc plate (41) is fixedly connected to the push plate (40). A sealing gasket (42) is fixedly connected to the inner side of the arc plate (41). A limit block (43) is fixedly connected above the push plate (40). The limit block (43) is slidably connected in a limit groove (44). The limit groove (44) is formed on the inner wall of the through groove (36).

2. The gas extraction system according to claim 1, characterized in that: The placement cavity (4), the first spring (5), the baffle (6) and the insertion rod (7) are arranged in a circular array in four groups about the center of the annular groove (2), and the sum of the lengths of the first spring (5), the baffle (6) and the insertion rod (7) is much greater than the internal depth of the placement cavity (4), and the length of the insertion rod (7) is greater than the internal depth of the slot (8).

3. The gas extraction system according to claim 1, characterized in that: The material of the protrusion (14) is rubber, and the cross-sectional area of ​​the protrusion (14) is slightly larger than the cross-sectional area of ​​the limiting cavity (13). The first glass tube (16) and the second glass tube (18) are in a vacuum state.

4. The gas extraction system according to claim 1, characterized in that: The first rotating shaft (24), connecting rod (25), slider (26) and second spring (28) are arranged symmetrically about the central axis of the support frame (22) in two sets, and the two sets of sliders (26) are connected by the second spring (28).

5. The gas extraction system according to claim 1, characterized in that: The extraction tube (1) also includes: A chute (29) is formed on the inner wall of the extraction pipe (1). A locking block (30) is engaged in the chute (29). An annular scraper (31) is fixedly connected to one side of the locking block (30). A support rod (32) is fixedly connected to the inner wall of the annular scraper (31). An internally threaded pipe (33) is fixedly connected to one end of the support rod (32). A screw rod (34) is internally threaded into the internally threaded pipe (33). One end of the screw rod (34) is rotatably connected to a perforated plate (35). The perforated plate (35) is fixedly connected inside the extraction pipe (1).

6. The gas extraction system according to claim 5, characterized in that: Both ends of the support rod (32) are fixedly connected to the annular scraper (31) and the internally threaded pipe (33) by welding, and the diameter of the annular scraper (31) is equal to the inner wall diameter of the extraction pipe (1).

7. The gas extraction system according to claim 1, characterized in that: The through groove (36), bearing seat (37), second rotating shaft (38), threaded rod (39), push plate (40), arc plate (41) and sealing gasket (42) are provided on both sides of the protective tube (20), and the radius of the two sets of sealing gaskets (42) is equal to the diameter of the extraction tube (1), and the material of the sealing gasket (42) is rubber.

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