Underground ventilation system

Abstract

The invention particularly relates to an underground ventilation system, and belongs to the technical field of ventilation. The underground ventilation system comprises an air duct and a plurality of sliding rail assemblies. Each sliding rail assembly comprises a sliding rail part, a sliding part and a guide ring, the sliding rail parts of the multiple sliding rail assemblies are in butt joint in sequence, guide grooves are formed in the left side and the right side of each sliding rail part respectively, the guide grooves penetrate through the sliding rail parts in the length direction of the sliding rail parts, each sliding part comprises two oppositely-arranged wall parts, the sliding rail parts are arranged between the two wall parts, and the wall parts are rotationally connected with pulleys. The pulley is contained in the guide groove, and the guide ring is arranged corresponding to the sliding part and connected to the sliding part. The air channel sequentially penetrates through the guide rings. The system has the advantage that the air duct position is convenient to adjust.

Description

Technical Field

[0001] This invention belongs to the field of ventilation technology, specifically relating to an underground ventilation system. Background Technology

[0002] In certain areas of underground mines, localized ventilation is required. For example, at the mine face, localized ventilation is necessary to provide fresh air and dilute and remove harmful gases and dust. One method of localized ventilation is to use air ducts to deliver airflow. These ducts are flexible structures that require fixing to the tunnel walls during installation. However, this method has a drawback: to ensure the reliability of the duct's fixation, multiple points along the entire length of the duct need to be secured. As the tunnel face advances, the duct also needs to be moved forward. The fixed structure of the duct makes the relocation operation cumbersome and inconvenient. Summary of the Invention

[0003] The purpose of this invention is to provide a downhole ventilation system that has the advantage of easy-to-move air ducts.

[0004] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows: This application provides a downhole ventilation system, including an air duct and multiple slide rail assemblies. Each slide rail assembly includes a slide rail section, a sliding section, and guide rings. The slide rail sections of the multiple slide rail assemblies are sequentially connected. Guide grooves are respectively provided on the left and right sides of the slide rail section, penetrating the slide rail section along its length. The sliding section includes two opposing wall sections, with the slide rail section disposed between the two wall sections. A pulley is rotatably connected to each wall section, and the pulley is accommodated in the guide groove. Guide rings are disposed corresponding to the sliding sections and connected to them. The air duct passes sequentially through each guide ring.

[0005] In some embodiments, a mounting groove is provided at the top of the slide rail portion, extending through the slide rail portion along its length. The opening of the mounting groove is located at the top of the slide rail portion and is smaller than the interior of the slide rail portion. The slide rail assembly also includes a mounting component, which includes a mounting rod, a first limiting portion, a second limiting portion, and a fixing nut. The mounting rod is inserted into the mounting groove through the opening, and the mounting rod and the opening of the mounting groove are in clearance fit. The first limiting portion is received in the mounting groove, and the mounting rod is connected to the first limiting portion. The second limiting portion is movably connected to the mounting rod along its axial direction, and is disposed opposite to the first limiting portion. The fixing nut is threadedly connected to the mounting rod.

[0006] In some embodiments, the slide rail assembly further includes an adjusting component, which comprises a flexible tube and a negative pressure section. A guide ring is connected to the sliding section via the flexible tube. The flexible tube contains multiple spheres arranged sequentially along the axial direction of the flexible tube. Each sphere is hollow and has multiple ventilation channels that communicate with its interior and penetrate its outer wall. The negative pressure section communicates with the side of the flexible tube away from the guide ring, thus maintaining a negative pressure state inside the flexible tube.

[0007] In some embodiments, two limiting members are provided between two adjacent spheres, and the two limiting members are arranged radially spaced along the flexible tube. Each limiting member includes a flexible bladder, a supporting wall, and a sealing portion. The flexible bladder is connected to the inner wall of the flexible tube, and along the axial direction of the flexible tube, its two sides abut against two adjacent spheres, and the flexible bladder contains a filler. The supporting wall is provided in the flexible bladder, and the supporting walls of the two flexible bladders are arranged opposite to each other, and the supporting wall is provided with a switching channel. The sealing portion is inserted into the port of the switching channel, and an elastic element is provided between the sealing portion and the supporting wall. Magnetic suction portions are provided on opposite sides of the two sealing portions.

[0008] In some embodiments, the negative pressure section includes a cover and a fixing part. The cover includes a top wall and an insertion hole facing the top wall. The top wall is provided with a negative pressure channel. The flexible tube is inserted into the cover through the insertion hole, and the negative pressure channel is inserted into the flexible tube. The fixing part is connected to the flexible tube and closes the insertion hole.

[0009] In some embodiments, the negative pressure part further includes a plurality of gaskets, which are stacked on the cover and arranged around the insertion hole. The gasket furthest from the cover is connected to the cover, and the fixing part is connected to the gasket furthest from the cover.

[0010] In some embodiments, the gasket furthest from the cover is detachably provided with a plurality of pressure-applying portions, which are arranged circumferentially around the fixing portion and abut against the fixing portion.

[0011] In some embodiments, the negative pressure section further includes a piston chamber and a piston portion. The piston chamber communicates with the negative pressure channel. The piston portion is housed in the piston chamber and is in a movably sealed fit with the piston chamber.

[0012] In some embodiments, the negative pressure component further includes a drive unit, and the piston chamber is provided with an opening, through which the drive unit is connected to the piston unit.

[0013] In some embodiments, the drive unit is rotatably connected to the piston unit, the inner wall of the piston chamber near the opening of the piston chamber is provided with a threaded section, the drive unit is provided with a mating part, and the mating part and the threaded section are threadedly connected.

[0014] The present invention has the following beneficial effects:

[0015] 1. The number of slide rails can be set as needed. For example, when this system is applied to the ventilation of the working face, after the working face has advanced a certain distance, a new slide rail can be set in front of the existing slide rail. After the slide rails are connected, the air duct can be moved from the rear to the front, which increases the convenience of adjusting the position of the air duct.

[0016] 2. The guide groove of the slide rail is exposed, which makes it easy to clean when there is dust in the guide groove, allowing the sliding part to move smoothly and adapting to use in dusty and harsh environments, with good reliability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the underground ventilation system of the present invention;

[0018] Figure 2 for Figure 1 Enlarged view of point A;

[0019] Figure 3 This is a schematic diagram of the downhole ventilation system of the present invention (showing the adjustment components);

[0020] Figure 4 for Figure 3 Enlarged view of point B;

[0021] Figure 5 This is a schematic diagram of the structure of the adjusting component of the present invention;

[0022] Figure 6 for Figure 5 Enlarged view of point C;

[0023] Figure 7 for Figure 6 Enlarged view of point D.

[0024] Reference numerals: 1-Slide rail, 2-Guide groove, 3-Sliding part, 4-Pulley, 5-Mounting groove, 6-Mounting component, 7-Adjusting component, 8-Guide ring, 9-Air duct, 10-Mounting rod, 11-First limiting part, 12-Second limiting part, 13-Fixing nut, 14-Flexible tube, 15-Cover, 16-Piston part, 17-Washer ring, 18-Piston chamber, 19-Drive part, 20-Pressure application part, 21-Insertion hole, 22-Fixing part, 23-Sphere, 24-Limiting component, 25-Matching part, 26-Threaded section, 27-Negative pressure channel, 28-Ventilation channel, 29-Flexible bladder, 30-Filling body, 31-Supporting wall, 32-Switch channel, 33-Sealing part, 34-Magnetic suction part, 35-Elastic element. Detailed Implementation

[0025] 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. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0026] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0027] This application provides a downhole ventilation system, including an air duct 9 and multiple slide rail assemblies. Each slide rail assembly includes a slide rail section 1, a sliding section 3, and guide rings 8. The slide rail sections 1 of the multiple slide rail assemblies are sequentially connected. Guide grooves 2 are respectively provided on the left and right sides of the slide rail section 1, extending through the slide rail section 1 along its length. The sliding section 3 includes two opposing wall sections, with the slide rail section 1 positioned between the two wall sections. A pulley 4 is rotatably connected to each wall section, and the pulley 4 is accommodated in the guide groove 2. Guide rings 8 are correspondingly provided to the sliding section 3 and connected to it. The air duct 9 passes sequentially through each guide ring 8.

[0028] Duct 9 is used to transport airflow. The device for inputting airflow into duct 9 can be selected from existing equipment. For example, a fan can be used to input airflow into duct 9.

[0029] The slide rail 1 is used to fix it to the inner wall of the tunnel.

[0030] The pulley 4 is housed in the guide groove 2, allowing the pulley 4 to roll within the guide groove 2, thereby enabling the sliding part 3 to move along the slide rail part 1.

[0031] The air duct 9 passes through the guide ring 8, so that the air duct 9 can be connected to the sliding part 3.

[0032] Multiple slide rails 1 are connected in sequence to form a guide rail structure. The sliding part 3 can move between different slide rails 1. By adjusting the position of the sliding part 3, the position of the air duct 9 can be moved.

[0033] In practical implementation, the number of slide rails 1 can be set as needed. For example, when this system is applied to the ventilation of the working face, after the working face has advanced a certain distance, a new slide rail 1 can be set in front of the existing slide rail 1. After the slide rails 1 are connected, the air duct 9 can be moved from the rear to the front.

[0034] The air duct 9 can be a foldable and retractable type, that is, the air duct 9 can be folded along its axis, so that a certain length can be reserved so that the air duct 9 can be gradually stretched as the working face advances.

[0035] The guide groove 2 of the slide rail 1 is exposed, which makes it easy to clean when there is dust in the guide groove 2, so that the sliding part 3 can move smoothly and is suitable for use in dusty and harsh environments, with good reliability.

[0036] In some embodiments, a mounting groove 5 is provided on the top of the slide rail portion 1, extending through the slide rail portion 1 along its length. The opening of the mounting groove 5 is located at the top of the slide rail portion 1 and is smaller than the interior of the slide rail portion 1. The slide rail assembly also includes a mounting component 6, which includes a mounting rod 10, a first limiting part 11, a second limiting part 12, and a fixing nut 13. The mounting rod 10 is inserted into the mounting groove 5 through the opening, with a clearance fit between the mounting rod 10 and the opening of the mounting groove 5. The first limiting part 11 is accommodated in the mounting groove 5, and the mounting rod 10 is connected to the first limiting part 11. The second limiting part 12 is movably connected to the mounting rod 10 along its axial direction, and is disposed opposite to the first limiting part 11. The fixing nut 13 is threadedly connected to the mounting rod 10.

[0037] The mounting rod 10 is used to connect the slide rail 1 to the inner wall of the tunnel. The specific structure of the mounting rod 10 fixed to the inner wall of the tunnel can be selected from the existing structures, and will not be described in detail here.

[0038] Because the opening of the mounting groove 5 is smaller than the interior of the slide rail 1, the first limiting part 11 cannot disengage from the mounting groove 5 through the opening of the mounting groove 5.

[0039] The mounting groove 5 extends through the slide rail 1 along the length of the slide rail 1, so that the first limiting part 11 can enter the mounting groove 5 from the end of the mounting groove 5.

[0040] The first limiting part 11 and the mounting rod 10 can be connected by threads.

[0041] The mounting rod 10 and the mounting groove 5 are fitted with a clearance, allowing the mounting rod 10 to move along the length of the slide rail 1 and also within a certain range along the width of the slide rail 1.

[0042] The mounting component 6 allows for fine-tuning of the position of the slide rail 1 relative to the mounting rod 10 after the mounting rod 10 is fixed to the inner wall of the tunnel, thereby enabling adjacent slide rails 1 to be accurately aligned.

[0043] The first limiting part 11 and the second limiting part 12 cooperate to lock the mounting rod 10. That is, after the position of the slide rail part 1 is fixed, the fixing nut 13 is turned, and the fixing nut 13 applies pressure to the second limiting part 12, so that the second limiting part 12 moves towards the first limiting part 11. The first limiting part 11 and the second limiting part 12 clamp the slide rail part 1, so that the relative position of the mounting rod 10 and the slide rail part 1 can be fixed.

[0044] In some embodiments, the slide rail assembly further includes an adjusting component 7, which includes a flexible tube 14 and a negative pressure section. A guide ring 8 is connected to the sliding part 3 via the flexible tube 14. The flexible tube 14 houses a plurality of spheres 23 arranged sequentially along the axial direction of the flexible tube 14. Each sphere 23 is hollow and has a plurality of ventilation channels 28 that communicate with its interior and penetrate its outer wall. The negative pressure section communicates with the side of the flexible tube 14 away from the guide ring 8, thus maintaining a negative pressure state inside the flexible tube 14.

[0045] Part of the guide ring 8 can be connected to the sliding part 3 via the adjusting component 7. For example, when this system is applied to the ventilation of the working face, one or more guide rings 8 near the working face can be connected to the sliding part 3 via the adjusting component 7, while other guide rings 8 can be directly connected to the sliding part 3. Since the material of the air duct 9 is relatively light, and most of the weight of the air duct 9 is supported by the guide rings 8 directly connected to the sliding part 3, with only the end fixed by the adjusting component 7, and the adjustment range of the orientation of the air duct 9 is small (for example, in one application scenario: the outlet axis of the air duct 9 faces forward, and the outlet axis of the air duct 9 is deflected by ten degrees during adjustment), the flexible tube body 14 can fully meet the requirements for fixing the air duct 9 and adjusting the orientation of the air duct 9.

[0046] The negative pressure section is connected to the side of the flexible tube 14 away from the guide ring 8, so that when the negative pressure switches the flexible tube 14 to a negative pressure state, the peripheral wall of the flexible tube 14 contracts, and at the same time, the side of the flexible tube 14 connected to the guide ring 8 contracts away from the guide ring 8. This allows multiple balls 23 to close and squeeze in sequence, and the shape of the flexible tube 14 can be fixed.

[0047] The adjusting component 7 allows for adjustment of the orientation of the air duct 9's port. In practice, initially, the flexible tube 14 is not under negative pressure, allowing it to deform freely. By adjusting the shape of the flexible tube 14, the guide ring 8 connected to it is displaced, thus changing the orientation of the air duct 9's port. After adjustment, the negative pressure section switches the interior of the flexible tube 14 to a negative pressure state, fixing its shape. Although the air duct 9's port may slightly sway during airflow, this sway does not affect the ventilation effect; in fact, swaying the port accelerates airflow diffusion at the working face, thus meeting operational requirements. Furthermore, by appropriately setting the number of adjusting components 7, the reliability of the air duct 9's fixation can be increased, while the sway amplitude can be controlled within acceptable limits.

[0048] The hollow structure of the sphere 23 and the air passage 28 allow airflow inside the flexible tube 14, enabling the side of the flexible tube 14 near the guide ring 8 and the side near the sliding part 3 to remain connected, allowing the negative pressure part to adjust the entire interior of the flexible tube 14 to a negative pressure state.

[0049] Adjusting the port orientation of the air duct 9 using adjusting component 7 offers several advantages: First, the adjustment process is simple and convenient. Second, the shape adjustment of the flexible tube 14 is highly flexible, allowing users to bend it into various shapes. This also makes the adjustment of the air duct 9's port highly flexible, enabling not only to change the port orientation but also its height. Third, the enclosed structure of the flexible tube 14 meets requirements even in harsh, dusty environments.

[0050] Furthermore, existing technologies also include deformable tubular structures. However, the drawback of these existing structures is that the better the support of the tubular body, the more difficult it is to deform, and therefore the more difficult it is to adjust. Conversely, the more easily the tubular body deforms, the worse its support. The advantage of the structure in this application embodiment is that, in the initial state, the flexible tubular body 14 requires less force to adjust, making adjustment easier. After adjustment, the flexible tubular body 14 can maintain its adjusted shape, and the torque required to deform it is increased, making it difficult to deform.

[0051] In some embodiments, two limiting members 24 are provided between two adjacent spheres 23. The two limiting members 24 are arranged radially spaced along the flexible tube 14. Each limiting member 24 includes a flexible bladder 29, a support wall 31, and a sealing portion 33. The flexible bladder 29 is connected to the inner wall of the flexible tube 14. Along the axial direction of the flexible tube 14, both sides of the flexible tube 14 abut against two adjacent spheres 23. The flexible bladder 29 contains a filler 30. The support wall 31 is provided in the flexible bladder 29. The support walls 31 of the two flexible bladders 29 are arranged opposite each other. The support wall 31 is provided with a switching channel 32. The sealing portion 33 is inserted into the port of the switching channel 32. An elastic element 35 is provided between the sealing portion 33 and the support wall 31. Magnetic suction portions 34 are provided on opposite sides of the two sealing portions 33.

[0052] The flexible capsule 29 is used to fill the gap between the two spheres 23.

[0053] The filler 30 can be a plurality of small spherical structures; for example, the filler 30 can be a small plastic spherical structure.

[0054] The flexible capsule 29 abuts against the sphere 23. This arrangement allows the flexible capsule 29 to restrict the distance between two adjacent spheres 23 along the axial direction of the flexible tube 14, while also limiting the sphere 23 along the radial direction of the flexible tube 14.

[0055] The deformable structure of the flexible capsule 29 allows the flexible tube 14 to deform so that the flexible capsule 29 can still limit the movement of the sphere 23.

[0056] The elastic element 35 can be a spring.

[0057] The magnetic attraction parts 34 of the two blocking parts 33 are configured to attract each other.

[0058] In the initial state, the sealing part 33 is inserted into the port of the switch channel 32, and the flexible capsule 29 is in a closed state.

[0059] A filter screen can be provided at the port of the switch channel 32 near the interior of the flexible capsule 29 to prevent the filler 30 from falling out of the flexible capsule 29.

[0060] When the flexible tube 14 switches to a negative pressure state, the tube wall between the two adjacent spheres 23 contracts. At this time, the distance between the two supporting walls 31 decreases. When the distance decreases to a threshold, the two sealing parts 33 attract and adhere to each other. At this time, the sealing parts 33 move out from the port of the switch channel 32, and the flexible bladder 29 is opened. Since the inside of the flexible tube 14 is in a negative pressure state, the inside of the flexible bladder 29 also switches to a negative pressure state. The flexible bladder 29 contracts, making it difficult for the flexible bladder 29 to deform. The flexible bladder 29 can support and limit the spheres 23, which can increase the overall shape retention ability of the flexible tube 14 and thus improve the support effect on the air duct 9.

[0061] When it is necessary to release the negative pressure state of the flexible tube 14, gas is first injected into the flexible tube 14, making the internal pressure of the flexible tube 14 slightly greater than atmospheric pressure, causing the flexible tube 14 to expand. On the one hand, the expansion of the tube wall of the flexible tube 14 allows the two sealing parts 33 to separate. On the other hand, the gas in the flexible tube 14 enters the flexible bladder 29, causing the flexible bladder 29 to expand, facilitating the return of the flexible tube 14 to its original shape. At the same time, when the flexible bladder 29 expands, the opposing walls of the two flexible bladders 29 tend to extend along the axial direction of the flexible tube 14, facilitating the separation of the magnetic attraction parts 34 of the two sealing parts 33. After the magnetic attraction parts 34 of the two sealing parts 33 separate, under the action of the elastic restoring force of the elastic element 35, the sealing parts 33 re-insert into the switch channel 32, causing the flexible bladder 29 to be sealed. At this time, the pressure inside the flexible tube 14 can be adjusted to equal atmospheric pressure, so that the flexible tube 14 does not need to remain in an expanded state for a long time, increasing the service life of the flexible tube 14. After the switch channel 32 is blocked, the pressure inside the flexible bladder 29 is slightly greater than the atmospheric pressure, which makes the flexible bladder 29 easy to deform. This makes it easier to adjust the flexible tube 14 to the required shape during subsequent use. At the same time, it allows the flexible bladder 29 to fit better with the sphere 23, improving the support effect of the flexible bladder 29 on the sphere 23 when the flexible bladder 29 is switched to a negative pressure state.

[0062] The elastic element 35 and the sealing part 33 work together to protect the flexible bladder 29. Specifically, when adjusting the shape of the flexible tube 14, bending the flexible tube 14 causes the flexible bladder 29 on the inner bend side to be squeezed by the two adjacent balls 23. At this time, the radial dimension of the flexible bladder 29 on the inner bend side increases, while the radial dimension of the flexible bladder 29 on the outer bend side decreases. This allows the flexible tube 14 to remain bent when the two flexible bladders 29 switch to a negative pressure state. However, under the squeezing action of the two adjacent balls 23, the internal air pressure of the flexible bladder 29 on the inner bend side increases, posing a risk of rupture. With the elastic element 35, when the internal air pressure of the flexible bladder 29 becomes too high, the sealing part 33 can open the switching channel 32, allowing air to escape and reducing the risk of rupture due to excessive internal air pressure.

[0063] In some embodiments, the negative pressure section includes a cover 15 and a fixing part 22. The cover 15 includes a top wall and an insertion hole 21 facing the top wall. The top wall is provided with a negative pressure channel 27. The flexible tube 14 is inserted into the cover 15 through the insertion hole 21, and the negative pressure channel 27 is inserted into the flexible tube 14. The fixing part 22 is connected to the flexible tube 14 and closes the insertion hole 21.

[0064] The fixing part 22 and the cover 15 form a closed chamber structure, which allows the interior of the flexible tube 14 to be switched to a negative pressure state through the negative pressure channel 27.

[0065] In some embodiments, the negative pressure part further includes a plurality of gaskets 17, which are stacked on the cover 15. The gaskets 17 are arranged around the insertion hole 21, and the gasket 17 furthest from the cover 15 is connected to the cover 15. The fixing part 22 is connected to the gasket 17 furthest from the cover 15.

[0066] The number of washers 17 can be set as needed.

[0067] When the number of gaskets 17 increases, the length of the flexible tube 14 outside the cover 15 increases; when the number of gaskets 17 decreases, the length of the flexible tube 14 outside the cover 15 decreases.

[0068] The gasket 17 furthest from the cover 15 can be bolted to the cover 15. By applying pressure to the middle gasket 17 through the gasket 17 furthest from the cover 15, good sealing is maintained between the gaskets 17.

[0069] With the action of the gasket 17, the length of the flexible tube 14 outside the cover 15 can be adjusted.

[0070] In some embodiments, the gasket 17 furthest from the cover 15 is detachably provided with a plurality of pressure-applying portions 20, which are arranged circumferentially around the fixing portion 22 and abut against the fixing portion 22.

[0071] The pressure-applying part 20 can be bolted to the gasket 17 furthest from the cover 15.

[0072] The pressure-applying part 20 allows the fixing part 22 to be connected to the gasket 17 furthest from the cover 15. The pressure-applying part 20 is arranged circumferentially around the fixing part 22, which improves the sealing between the fixing part 22 and the gasket 17.

[0073] In some embodiments, the negative pressure section further includes a piston chamber 18 and a piston portion 16. The piston chamber 18 communicates with the negative pressure channel 27. The piston portion 16 is accommodated in the piston chamber 18 and is in a movably sealed fit with the piston chamber 18.

[0074] The piston chamber 18 is connected to the negative pressure channel 27, so that the air pressure in the flexible tube 14 can be adjusted when the piston part 16 moves in the piston chamber 18.

[0075] In some embodiments, the negative pressure component further includes a drive unit 19, and the piston chamber 18 is provided with an opening, through which the drive unit 19 is connected to the piston unit 16.

[0076] The drive unit 19 is used to drive the piston unit 16 to move. Under the action of the drive unit 19, the operator can externally adjust the position of the piston unit 16 in the piston chamber 18.

[0077] In some embodiments, the drive unit 19 is rotatably connected to the piston unit 16, and the inner wall of the piston chamber 18 near the opening of the piston chamber 18 is provided with a threaded section 26. The drive unit 19 is provided with a mating part 25, and the mating part 25 and the threaded section 26 are threadedly connected.

[0078] The mating part 25 and the threaded section 26 are threadedly connected, so that the drive part 19 can be moved by rotating the mating part 25.

[0079] The threaded connection between the mating part 25 and the threaded section 26 serves two purposes: firstly, it locks the position of the drive part 19, thereby locking the position of the piston part 16. Secondly, as the air pressure in the flexible tube 14 decreases, the resistance to pulling the drive part 19 gradually increases. Once the drive part 19 moves to a position where the mating part 25 can engage with the threaded section 26, the piston part 16 can be pulled by rotating the drive part 19, reducing the difficulty of moving the piston part 16.

[0080] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications, alterations, alterations, or substitutions made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A well ventilation system, characterized in that, include: Multiple slide rail assemblies, each slide rail assembly including a slide rail part (1), a sliding part (3) and a guide ring (8), wherein the slide rail parts (1) of the multiple slide rail assemblies are connected in sequence, and guide grooves (2) are respectively provided on the left and right sides of the slide rail part (1), the guide grooves (2) penetrate the slide rail part (1) along the length direction of the slide rail part (1), the sliding part (3) includes two oppositely arranged wall parts, the slide rail part (1) is disposed between the two wall parts, the wall parts are rotatably connected to a pulley (4), the pulley (4) is accommodated in the guide groove (2), and the guide ring (8) is disposed corresponding to the sliding part (3) and is connected to the sliding part (3); Air ducts (9) are sequentially installed through each of the guide rings (8).

2. The downhole ventilation system according to claim 1, characterized in that, The top of the slide rail part (1) is provided with a mounting groove (5), which extends through the slide rail part (1) along its length. The opening of the mounting groove (5) is located at the top of the slide rail part (1), and the opening of the mounting groove (5) is smaller than the interior of the slide rail part (1). The slide rail assembly also includes a mounting component (6), which includes: The mounting rod (10) is inserted into the mounting groove (5) through the opening of the mounting groove (5), and the mounting rod (10) and the opening of the mounting groove (5) are fitted with a clearance. The first limiting part (11) is accommodated in the mounting groove (5), and the mounting rod (10) is connected to the first limiting part (11); The second limiting part (12) is movably connected to the mounting rod (10) along the axial direction of the mounting rod (10), and the second limiting part (12) is disposed opposite to the first limiting part (11); A fixing nut (13) is threaded onto the mounting rod (10).

3. The downhole ventilation system according to claim 1, characterized in that, The slide rail assembly further includes an adjustment component (7), the adjustment component (7) comprising: A flexible tube (14) is provided, and the guide ring (8) is connected to the sliding part (3) through the flexible tube (14). The flexible tube (14) contains a plurality of spheres (23). The plurality of spheres (23) are arranged sequentially along the axial direction of the flexible tube (14). The interior of the spheres (23) is hollow. The spheres (23) are provided with a plurality of ventilation channels (28). The ventilation channels (28) are connected to the interior of the spheres (23). The ventilation channels (28) penetrate the outer wall of the spheres (23). The negative pressure section is connected to the side of the flexible tube (14) away from the guide ring (8), so that the inside of the flexible tube (14) is in a negative pressure state.

4. The downhole ventilation system according to claim 3, characterized in that, Two limiting components (24) are provided between two adjacent spheres (23), and the two limiting components (24) are arranged radially apart along the flexible tube (14). The limiting components (24) include: A flexible capsule (29) is connected to the inner wall of the flexible tube (14). Along the axial direction of the flexible tube (14), the two sides of the flexible capsule (29) abut against two adjacent spheres (23). The flexible capsule (29) contains a filler (30). A support wall (31) is provided on the flexible capsule (29), and the support walls (31) of the two flexible capsules (29) are arranged opposite to each other. The support wall (31) is provided with a switch channel (32). A blocking part (33) is inserted into the port of the switch channel (32). An elastic element (35) is provided between the blocking part (33) and the support wall (31). A magnetic attraction part (34) is provided on the opposite side of the two blocking parts (33).

5. The downhole ventilation system according to claim 3, characterized in that, The negative pressure section includes: The cover (15) includes a top wall and an insertion hole (21) facing the top wall. The top wall is provided with a negative pressure channel (27). The flexible tube (14) is inserted into the cover (15) through the insertion hole (21). The negative pressure channel (27) is inserted into the flexible tube (14). A fixing part (22) is connected to the flexible tube body (14), and the fixing part (22) closes the insertion hole (21).

6. The downhole ventilation system according to claim 5, characterized in that, The negative pressure part also includes a plurality of gaskets (17), which are stacked on the cover (15). The gaskets (17) are arranged around the insertion hole (21). The gasket (17) furthest from the cover (15) is connected to the cover (15). The fixing part (22) is connected to the gasket (17) furthest from the cover (15).

7. The downhole ventilation system according to claim 6, characterized in that, The gasket (17) furthest from the cover (15) is detachably provided with a plurality of pressure-applying parts (20), which are arranged circumferentially around the fixing part (22) and abut against the fixing part (22).

8. The downhole ventilation system according to claim 5, characterized in that, The negative pressure section also includes: The piston chamber (18) is connected to the negative pressure channel (27); The piston part (16) is housed in the piston cavity (18) and is in a movably sealed fit with the piston cavity (18).

9. The downhole ventilation system according to claim 8, characterized in that, The negative pressure component also includes a drive unit (19), the piston chamber (18) is provided with an opening, and the drive unit (19) is connected to the piston unit (16) through the opening.

10. The downhole ventilation system according to claim 9, characterized in that, The drive unit (19) is rotatably connected to the piston unit (16). The inner wall of the piston chamber (18) near the opening of the piston chamber (18) is provided with a threaded section (26). The drive unit (19) is provided with a mating part (25). The mating part (25) and the threaded section (26) are threadedly connected.

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