A gas dilution device

Abstract

The application discloses a gas dilution device, which comprises a first cylinder, a second cylinder, a ventilation pipeline, a shielding assembly, a fan and a conical pipeline; the first cylinder is fixedly connected with the second cylinder, and the first cylinder is provided with an air inlet and an air outlet; the ventilation pipeline is fixedly connected with the conical pipeline; the shielding assembly is arranged outside the ventilation pipeline and is slidably connected with the inner side of the first cylinder; the fan is arranged in the first cylinder; a first conical channel is formed in the second cylinder, and the conical pipeline is arranged in the first conical channel; a plurality of perforations are formed outside the conical pipeline; a plurality of high-pressure air inlet cavities are formed in the second cylinder, and a jet channel is arranged in each high-pressure air inlet cavity; and each perforation can communicate with each jet channel. The application can realize the first extraction and discharge treatment on the gas gathering area, then realize the jet treatment on the low-concentration gas after the extraction and discharge, and the extraction and discharge and the jet action are completely switched by the gas dilution device, so that the dilution effect of the gas is effectively improved.

Description

Technical Field

[0001] This application relates to the field of mine gas dilution technology, and more particularly to a gas dilution device. Background Technology

[0002] Coal mining generates a large amount of methane. When the methane concentration in the mine reaches a certain level, it can cause oxygen deprivation and suffocation. Moreover, high concentrations of methane can explode when exposed to an open flame, which is extremely dangerous. Large ventilation systems are usually used to extract methane over large areas. However, due to the special underground geographical environment, methane is lighter than air and tends to accumulate in some corners, such as the upper corners of the working face, electromechanical chambers, and drilling sites. In particular, the concentration of methane accumulates and increases over time in drilling sites. If it cannot be discharged, it becomes a huge safety hazard.

[0003] In existing technologies, gas diluents are generally used to dilute mine gas. The basic principle is that the gas diluent is connected to a compressed air pipeline. Through the design of certain channels inside the gas diluent, compressed air is ejected from the outlet of the gas diluent, which then sprays the gas into the area where the gas has accumulated, thus dispersing the gas and achieving the purpose of gas dilution. This method can dilute gas to a certain extent. However, this method mainly disperses the accumulated gas. If the gas concentration in the area is low, this method is effective in diluting the gas. If the gas concentration in the area is high, directly using this method will only disperse the gas in that area to other places. The dispersed gas may then continue to accumulate in other areas, and it still cannot effectively dilute the gas, so safety hazards still exist. Summary of the Invention

[0004] This application provides a gas dilution device that solves the technical problem in the prior art where the use of jet-type gas dilution devices to spray gas into areas where gas accumulates in mines can lead to the dispersed gas accumulating in other areas, thus failing to effectively dilute the gas. The device enables the extraction of gas from areas where gas accumulates, followed by the spraying of the low-concentration gas after extraction. The extraction and spraying actions are switched entirely through a single gas dilution device, effectively improving the gas dilution effect and reducing safety hazards.

[0005] In a first aspect, this application provides a gas dilution device, comprising a first cylinder, a second cylinder, a ventilation duct, a shielding assembly, a fan, and a conical pipe; the first cylinder and the second cylinder are fixedly connected, and an air inlet and an air outlet are provided on the outer side of the first cylinder; one end of the ventilation duct extends into the second cylinder and is fixedly connected to the small end of the conical pipe, and the ventilation duct is rotatably connected to the second cylinder; the shielding assembly is disposed on the outer side of the ventilation duct and slidably connected to the inner side of the first cylinder, capable of shielding the air inlet and the air outlet respectively, and capable of driving the ventilation duct to move together. The second cylinder rotates in one step; the fan is located inside the first cylinder and is positioned at the end of the ventilation duct opposite to the conical duct; the second cylinder has a first conical channel and a second conical channel inside, the conical duct is located in the first conical channel and rotatably connected to the first conical channel; multiple injection holes are arranged in a ring array on the outer side of the conical duct; multiple high-pressure air inlet chambers are arranged in a ring array inside the second cylinder, each high-pressure air inlet chamber has an air inlet nozzle arranged radially outward, and each high-pressure air inlet chamber has a jet channel arranged radially inward; the multiple injection holes can communicate with the multiple jet channels respectively when the conical duct rotates.

[0006] In conjunction with the first aspect, in one possible implementation, the shielding assembly includes an arc-shaped plate, a connecting rod, and a lever; an arc-shaped groove is formed on the first cylinder; one end of the connecting rod is fixedly connected to the outer side of the ventilation duct, and the other end of the connecting rod is fixedly connected to the inner side of the arc-shaped plate; the outer side of the arc-shaped plate is attached to the inner side of the first cylinder and slidably connected to the inner side of the first cylinder, thereby shielding the air inlet and the air outlet respectively; the lever passes through the arc-shaped groove and is fixedly connected to the outer side of the arc-shaped plate, and the lever can slide in the arc-shaped groove.

[0007] In conjunction with the first aspect, in one possible implementation, the inner side of the high-pressure intake chamber is provided with an inclined surface, which is smoothly connected to the injection channel.

[0008] In conjunction with the first aspect, in one possible implementation, the shielding assembly further includes an arc-shaped strip; one end of the arc-shaped strip is fixedly connected to the lever, and the inner side of the arc-shaped strip contacts and is slidably connected to the outer side of the first cylinder, thereby shielding the arc-shaped groove.

[0009] In conjunction with the first aspect, in one possible implementation, the gas dilution device provided in this application further includes a limiting block; the limiting block is fixedly connected to the outer side of the end of the ventilation duct near the tapered duct and contacts the end of the second cylinder.

[0010] Secondly, this application provides a gas dilution method, comprising: firstly, extracting and discharging gas: the open end of the second cylinder is oriented towards the area where gas needs to be extracted; the exhaust port on the first cylinder is connected to the return airway; the shielding component is moved to block the air inlet on the first cylinder, at which point the exhaust port on the first cylinder is open; as the shielding component slides along the inner side of the first cylinder, it drives the ventilation duct to rotate synchronously, thereby driving the conical pipe to rotate synchronously in the first conical channel, causing the perforations on the conical pipe to be misaligned with the injection channel, thus blocking the injection channel through the outer side of the conical pipe after the exhaust port is opened; then, the fan is started to rotate forward, creating a negative pressure inside the first cylinder, so that gas is drawn in from the second conical channel inside the second cylinder, and then extracted into the first cylinder through the conical pipe and the ventilation duct, and finally discharged from the return airway through the exhaust port; then, gas injection is performed. Dilution: After the fan rotates forward for a period of time and the gas concentration in the area to be extracted decreases significantly, the shielding component is reversed again, causing it to block the exhaust port on the first cylinder. At this time, the air inlet on the first cylinder is open. As the shielding component slides along the inner side of the first cylinder, it drives the ventilation duct to rotate in the opposite direction, which in turn drives the conical pipe to rotate in the opposite direction in the first conical channel. This causes the perforation hole on the conical pipe to finally align and connect with the injection channel, so that the compressed air entering the high-pressure air intake chamber can be injected into the conical pipe through the perforation hole along the injection channel and finally ejected from the second conical channel. This spray dilutes the area after gas extraction, thereby reducing the gas concentration. At the same time, the fan is started to rotate in the opposite direction. The fan draws air from inside the tunnel through the air inlet, and then inputs it into the conical pipe through the ventilation duct to merge with the injected compressed air, and finally ejected from the second conical channel together.

[0011] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0012] This application employs a first cylinder, a second cylinder, ventilation ducts, a shielding assembly, a fan, and a conical pipe. The first and second cylinders are connected via the ventilation duct and the conical pipe. An exhaust port and an inlet are provided on the first cylinder, and the shielding assembly can shield both the exhaust port and the inlet. This ensures that when the fan is pumping air, the exhaust port is opened and connected to the return airway inside the mine, allowing gas to be drawn into the first cylinder first, then enters the return airway through the exhaust port, and is finally discharged. Similarly, when the fan is blowing air, the shielding assembly shields the exhaust port and opens the inlet, allowing the fan to draw air from the inlet to the fan and blow it into the second cylinder, thus achieving the fan's blowing operation. The fan's blowing operation needs to coordinate with the high-pressure air inlet chamber in the second cylinder and the compressed air pipeline in the mine to ultimately achieve the jetting operation of the second cylinder.

[0013] The gas dilution device of this application requires gas extraction and discharge in the first step. This involves moving the shielding component to block the air inlet on the first cylinder, while the exhaust port on the first cylinder remains open. As the shielding component slides along the inner side of the first cylinder, it drives the ventilation duct to rotate synchronously, which in turn drives the conical pipe to rotate synchronously in the first conical channel. This causes the injection holes and injection channels on the conical pipe to be misaligned. Thus, after the exhaust port is opened, the injection channel is blocked by the outer side of the conical pipe. At this time, the compressed air in the high-pressure air inlet chamber cannot enter the second cylinder and cannot perform the injection action. Only the subsequent extraction and discharge work of the fan can proceed. That is, the fan is then started to rotate forward, creating a negative pressure in the first cylinder. As a result, the gas is drawn in from the second conical channel inside the second cylinder, and then extracted into the first cylinder through the conical pipe and ventilation duct. Finally, it enters the return airway from the exhaust port and is discharged from the roadway.

[0014] The second step involves gas injection and dilution. After the blower has been running forward for a period of time and the gas concentration in the area to be extracted has decreased significantly, the shielding component is reversed. This causes the shielding component to block the exhaust port on the first cylinder, while the air inlet on the first cylinder remains open. As the reverse shielding component slides along the inner side of the first cylinder, it drives the ventilation duct to rotate in the opposite direction, which in turn drives the conical pipe to rotate in the opposite direction in the first conical channel. This aligns the perforation holes on the conical pipe with the injection channel, allowing the compressed air entering the high-pressure intake chamber to be injected into the conical pipe through the perforation holes and finally exit from the second conical channel. This process effectively dilutes the extracted gas in the area, thus reducing the gas concentration. Simultaneously, the blower is started in the opposite direction. The blower draws air from inside the tunnel through the air inlet and then, through the ventilation duct, inputs it into the conical pipe to combine with the injected compressed air. Finally, both are ejected from the second conical channel, increasing the airflow.

[0015] This technology effectively solves the technical problem in existing technologies where spray-type gas diluents are used to treat areas where gas accumulates in mines, causing the dispersed gas to accumulate in other areas and failing to effectively dilute the gas. It enables the gas accumulation area to be pumped out first, and then the low-concentration gas after pumping out is sprayed out. The pumping and spraying actions are completely switched through a gas dilution device, which effectively improves the gas dilution effect and reduces safety hazards. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A cantilever diagram I of a gas dilution device provided in this application embodiment;

[0018] Figure 2 Axonometric drawing II of a gas dilution device provided in the embodiments of this application;

[0019] Figure 3 A cantilever view I of a gas dilution device removing the second cylinder, provided in an embodiment of this application;

[0020] Figure 4 A cantilever view II of a gas dilution device removing the second cylinder, provided in an embodiment of this application;

[0021] Figure 5 The right view of a gas dilution device provided in this application embodiment when the shielding component blocks the exhaust vent;

[0022] Figure 6 The right view of a gas dilution device provided in this application embodiment when the shielding component blocks the air inlet;

[0023] Figure 7 for Figure 5 A cross-sectional view along the AA direction;

[0024] Figure 8 for Figure 6 Cross-sectional view along the BB direction;

[0025] Figure 9 for Figure 6 A cross-sectional view along the CC direction;

[0026] Figure 10 An isometric view of a gas dilution device provided in this application embodiment when a drive component is added.

[0027] Reference numerals: 1-First cylinder; 11-Air inlet; 12-Air outlet; 13-Arc-shaped groove; 2-Second cylinder; 21-First conical channel; 22-Second conical channel; 3-Ventilation duct; 4-Shielding assembly; 41-Arc-shaped plate; 42-Connecting rod; 43-Toggle rod; 44-Arc-shaped strip; 5-Fan; 6-Conical duct; 61-Perforation hole; 7-High-pressure air inlet chamber; 71-Jet channel; 72-Air inlet nozzle; 8-Limiting block; 9-Drive assembly; 91-Motor; 92-Rotating shaft; 93-L-shaped bracket; 94-Rotating ring. Detailed Implementation

[0028] 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, not all, of the embodiments of the present invention. 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.

[0029] In the description of the embodiments of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the embodiments of the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0030] Reference Figure 1-9This application provides a gas dilution device, including a first cylinder 1, a second cylinder 2, a ventilation duct 3, a shielding component 4, a fan 5, and a conical pipe 6. The first cylinder 1 and the second cylinder 2 are fixedly connected. An air inlet 11 and an air outlet 12 are provided on the outer side of the first cylinder 1. One end of the ventilation duct 3 extends into the second cylinder 2 and is fixedly connected to the small end of the conical pipe 6. The ventilation duct 3 and the second cylinder 2 are rotatably connected. The shielding component 4 is disposed on the outer side of the ventilation duct 3 and slidably connected to the inner side of the first cylinder 1. It can shield the air inlet 11 and the air outlet 12 respectively, and can drive the ventilation duct 3 to rotate synchronously. The fan 5 is located inside the first cylinder 1 and is positioned at the end of the ventilation duct 3 away from the conical duct 6. The second cylinder 2 has a first conical channel 21 and a second conical channel 22 inside, and the conical duct 6 is located in the first conical channel 21 and is rotatably connected to the first conical channel 21. Multiple injection holes 61 are arranged in an annular array on the outer side of the conical duct 6. Multiple high-pressure air inlet chambers 7 are arranged in an annular array inside the second cylinder 2. Air inlet nozzles 72 are arranged radially outward in the high-pressure air inlet chambers 7, and injection channels 71 are arranged radially inward in the high-pressure air inlet chambers 7. The multiple injection holes 61 can communicate with the multiple injection channels 71 respectively when the conical duct 6 rotates.In this embodiment, the area of ​​the arc-shaped plate 41 is larger than the area of ​​the air inlet 11 or the air outlet 12, thereby sealing and blocking the air inlet 11 or the air outlet 12 respectively. During gas dilution, the gas in the area is first extracted and discharged, and then the gas in the area is diluted by injection. Specifically, the opening end of the second cylinder 2 is first oriented towards the area where gas needs to be extracted, the air outlet 12 on the first cylinder 1 is connected to the return airway, and then the blocking component 4 is moved to block the air inlet 11 on the first cylinder 1 and open the air outlet 12 on the first cylinder 1. The blocking component 4 slides along the inner side of the first cylinder 1. During operation, the ventilation duct 3 rotates synchronously, which in turn drives the conical duct 6 to rotate synchronously in the first conical channel 21. This causes the injection holes 61 on the conical duct 6 to be misaligned with the injection channel 71. Thus, after the exhaust port 12 is opened, the injection channel 71 is blocked by the outside of the conical duct 6. At this time, the compressed air in the high-pressure intake chamber 7 cannot enter the second cylinder 2 and cannot perform the injection action. Only the subsequent extraction and discharge work of the fan 5 can be carried out. That is, the fan 5 is started to rotate forward, creating a negative pressure in the first cylinder 1, thereby drawing the gas from the opening end of the second cylinder 2, and then through the conical duct 6 and the ventilation duct 3, it is finally discharged. The gas is drawn into the first cylinder 1, then enters the return airway through the exhaust port 12 and is finally discharged from the roadway. After the blower 5 rotates forward for a period of time, causing a significant reduction in the gas concentration in the area, the gas is then diluted by injection. This involves reversing the movement of the shielding component 4, causing it to block the exhaust port 12 on the first cylinder 1. At this time, the air inlet 11 on the first cylinder 1 is open. As the reverse shielding component 4 slides along the inner side of the first cylinder 1, it drives the ventilation duct 3 to rotate in the opposite direction, which in turn drives the conical pipe 6 to rotate in the opposite direction in the first conical channel 21, so that the perforation 61 on the conical pipe 6 finally aligns with the injection channel 71. When aligned and connected, the compressed air entering the high-pressure air intake chamber 7 can be injected along the injection channel 71 and through the injection hole 61 into the conical pipe 6, and finally ejected from the second conical channel 22. This can spray and dilute the gas in the area after gas extraction, thereby effectively reducing the gas concentration. At the same time as the shielding component 4 is reversed, the fan 5 is started to rotate in the reverse direction. The fan 5 draws air from inside the roadway through the air inlet 11, and then inputs it into the conical pipe 6 through the ventilation pipe 3 to merge with the injected compressed air. Finally, they are ejected together from the second conical channel 22, increasing the injection airflow and ultimately achieving effective spray and dilution of the gas in the area.

[0031] Reference Figure 3-8The shielding component 4 includes an arc-shaped plate 41, a connecting rod 42, and a lever 43; an arc-shaped groove 13 is provided on the first cylinder 1; one end of the connecting rod 42 is fixedly connected to the outside of the ventilation duct 3, and the other end of the connecting rod 42 is fixedly connected to the inside of the arc-shaped plate 41; the outside of the arc-shaped plate 41 is attached to the inside of the first cylinder 1 and is slidably connected to the inside of the first cylinder 1, which can shield the air inlet 11 and the air outlet 12 respectively; the lever 43 passes through the arc-shaped groove 13 and is fixedly connected to the outside of the arc-shaped plate 41, and the lever 43 can slide in the arc-shaped groove 13. In this embodiment, the specific shielding component 4 includes an arc-shaped plate 41, a connecting rod 42, and a lever 43. By moving the lever 43, the lever 43 slides in the arc-shaped groove 13, thereby causing the arc-shaped plate 41 to slide inside the first cylinder 1. The arc-shaped plate 41 drives the connecting rod 42 to rotate synchronously, thereby causing the ventilation duct 3 and the conical duct 6 to rotate synchronously. Ultimately, when the air inlet 11 is shielded and the air outlet 12 is opened, the injection hole 61 on the conical duct 6 is misaligned with the injection channel 71. At this time, by controlling the fan 5 to rotate forward, the gas is extracted and discharged, and finally discharged into the return airway from the air outlet 12. Similarly, by moving the lever 43 in the opposite direction... This allows the arc plate 41 to slide below the exhaust port 12 and block the exhaust port 12, opening the air inlet 11. At the same time, the injection hole 61 on the conical pipe 6 is aligned and connected with the injection channel 71, so that the compressed air entering the high-pressure air intake chamber 7 can be injected into the conical pipe 6 along the injection channel 71 and through the injection hole 61, and finally ejected from the second conical channel 22. At this time, by controlling the fan 5 to reverse, air inside the roadway can be drawn through the air inlet 11, and then input into the conical pipe 6 together through the ventilation pipe 3 to merge with the injected compressed air, and finally ejected from the second conical channel 22 together, increasing the injection airflow.

[0032] Reference Figure 7 The high-pressure air intake chamber 7 has an inclined surface on its inner side, which smoothly connects with the injection channel 71. In this embodiment, the inclined surface on the inner side of the high-pressure air intake chamber 7 allows the compressed air entering from the air intake nozzle 72 to smoothly enter the injection channel 71 under the guidance of the inclined surface and then be ejected through the injection hole 61.

[0033] Reference Figure 1-6The shielding component 4 also includes an arc-shaped strip 44; one end of the arc-shaped strip 44 is fixedly connected to the lever 43, and the inner side of the arc-shaped strip 44 contacts and slides with the outer side of the first cylinder 1, thus shielding the arc-shaped groove 13. The arc-shaped strip 44 is further provided in this embodiment mainly because when the arc-shaped plate 41 shields the air inlet, causing the exhaust port to open, and the blower 5 rotates to draw gas into the first cylinder 1, the gas will enter the return airway through the exhaust port. Although the air inlet is shielded, a small amount of gas will still pass through the arc-shaped groove 13 and leak from the first cylinder 1 into the mine. Therefore, the arc-shaped strip 44 is provided so that while the arc-shaped plate 41 shields the air inlet, the arc-shaped strip 44 can simultaneously shield the arc-shaped groove 13, preventing gas leakage from the arc-shaped groove 13.

[0034] Reference Figure 7-8 The gas dilution device provided in this embodiment also includes a limiting block 8; the limiting block 8 is fixedly connected to the outer side of the end of the ventilation duct 3 near the conical pipe 6 and contacts the end of the second cylinder 2. The limiting block 8 is further provided in this embodiment mainly to prevent the ventilation duct 3 and the conical pipe 6 from moving away from the fan 5 during rotation, and to avoid the outer side of the conical pipe 6 not fitting tightly with the inner side of the first conical channel 21. Thus, when the injection hole 61 on the conical pipe 6 is misaligned with the injection channel 71, the outer side of the conical pipe 6 can effectively block the injection channel 71.

[0035] Reference Figure 10 In this embodiment, the toggle lever 43 can be manually operated or driven by the drive assembly 9. Specifically, a drive assembly 9 is provided, which includes a motor 91, a rotating shaft 92, an L-shaped bracket 93, and a rotating ring 94. The rotating ring 94 has a notch, and the toggle lever 43 is located in the notch and fixedly connected to both ends of the rotating ring 94. The rotating ring 94 is sleeved on the outside of the first cylinder 1 and can rotate relative to the outside of the first cylinder 1. The rotating shaft 92 passes through the end of the first cylinder 1 and is rotatably connected to the first cylinder 1. The output end of the motor 91 is fixedly connected to the end of the rotating shaft 92. One end of the L-shaped bracket 93 is fixedly connected to the rotating ring 94, and the other end of the L-shaped bracket 93 is fixedly connected to the outside of the rotating shaft 92. By driving the motor 91 to rotate, the rotating shaft 92 and the L-shaped bracket 93 are driven to rotate, thereby driving the rotating ring 94 to rotate, which in turn pushes the toggle lever 43 to slide in the arc groove 13, ultimately realizing the toggle action of the blocking assembly 4.

[0036] This application provides a gas dilution method, including: firstly, extracting and discharging gas: the open end of the second cylinder 2 is oriented towards the area where gas needs to be extracted; the exhaust port 12 on the first cylinder 1 is connected to the return airway; the shielding component 4 is activated to block the air inlet 11 on the first cylinder 1, at which point the exhaust port 12 on the first cylinder 1 is open; as the shielding component 4 slides along the inner side of the first cylinder 1, it drives the ventilation duct 3 to rotate synchronously, thereby driving the conical pipe 6 in the first conical passage... The synchronous rotation in channel 21 causes the injection holes 61 on the conical pipe 6 to be misaligned with the injection channel 71, thus blocking the injection channel 71 through the outside of the conical pipe 6 after the exhaust port 12 is opened; then the blower 5 is started to rotate forward, creating negative pressure in the first cylinder 1, so that gas is drawn in from the second conical channel 22 inside the second cylinder 2, and then finally drawn into the first cylinder 1 through the conical pipe 6 and ventilation pipe 3, and then enters the return air roadway from the exhaust port 12 and is finally discharged from the roadway; then the gas is injected and diluted. After the blower 5 rotates forward for a period of time and the gas concentration in the area where gas needs to be extracted decreases significantly, the shielding component 4 is reversed again, causing the shielding component 4 to block the exhaust port 12 on the first cylinder 1. At this time, the air inlet 11 on the first cylinder 1 is in the open state. As the shielding component 4 slides along the inner side of the first cylinder 1, it drives the ventilation duct 3 to rotate in the opposite direction, which in turn drives the conical pipe 6 to rotate in the opposite direction in the first conical channel 21, so that the injection hole 61 on the conical pipe 6 and the injection channel 71 are aligned. Finally, the alignment is completed, so that the compressed air entering the high-pressure air intake chamber 7 can be injected along the injection channel 71 and through the injection hole 61 into the conical pipe 6, and finally ejected from the second conical channel 22. This can spray and dilute the area after gas extraction, thereby reducing the gas concentration. At the same time, the blower 5 is started to rotate in reverse. The blower 5 draws air from inside the roadway through the air inlet 11, and then inputs it into the conical pipe 6 through the ventilation pipe 3 to merge with the injected compressed air, and finally ejected from the second conical channel 22 together.

[0037] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments.

[0038] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.

Claims

1. A gas dilution device, characterized in that, It includes a first cylinder (1), a second cylinder (2), a ventilation duct (3), a shielding assembly (4), a fan (5), and a tapered duct (6); The first cylinder (1) and the second cylinder (2) are fixedly connected. An air inlet (11) and an air outlet (12) are provided on the outer side of the first cylinder (1). One end of the ventilation duct (3) extends into the second cylinder (2) and is fixedly connected to the small end of the tapered duct (6), and the ventilation duct (3) is rotatably connected to the second cylinder (2); The shielding component (4) is disposed on the outside of the ventilation duct (3) and is slidably connected to the inside of the first cylinder (1). It can shield the air inlet (11) and the air outlet (12) respectively, and can drive the ventilation duct (3) to rotate synchronously. The fan (5) is located inside the first cylinder (1) and is located at the end of the ventilation duct (3) away from the tapered duct (6); The second cylindrical body (2) has a first conical channel (21) and a second conical channel (22) inside. The conical pipe (6) is located in the first conical channel (21) and is rotatably connected to the first conical channel (21). The outer ring array of the tapered pipe (6) is provided with multiple perforations (61); The second cylinder (2) has multiple high-pressure air inlet chambers (7) arranged in an annular array inside. Each high-pressure air inlet chamber (7) has an air inlet nozzle (72) arranged radially outward and an injection channel (71) arranged radially inward. The plurality of perforations (61) can communicate with the plurality of injection channels (71) respectively when the conical pipe (6) is rotated.

2. The gas dilution device according to claim 1, characterized in that, The shielding assembly (4) includes an arc-shaped plate (41), a connecting rod (42), and a lever (43); An arc-shaped groove (13) is provided on the first cylindrical body (1); One end of the connecting rod (42) is fixedly connected to the outside of the ventilation duct (3), and the other end of the connecting rod (42) is fixedly connected to the inside of the arc plate (41). The outer side of the arc plate (41) is attached to the inner side of the first cylinder (1) and slidably connected to the inner side of the first cylinder (1), which can respectively block the air inlet (11) and the air outlet (12). The lever (43) passes through the arc-shaped groove (13) and is fixedly connected to the outer side of the arc-shaped plate (41). The lever (43) can slide in the arc-shaped groove (13).

3. The gas dilution device according to claim 1, characterized in that, The inner side of the high-pressure air intake chamber (7) is provided with an inclined surface, which is smoothly connected to the injection channel (71).

4. The gas dilution device according to claim 2, characterized in that, The shielding component (4) also includes an arc-shaped strip (44); One end of the arc-shaped strip (44) is fixedly connected to the lever (43), and the inner side of the arc-shaped strip (44) is in contact with and slidably connected to the outer side of the first cylinder (1), which can block the arc-shaped groove (13).

5. The gas dilution device according to claim 1, characterized in that, It also includes a finite bit block (8); The limiting block (8) is fixedly connected to the outer side of the end of the ventilation duct (3) near the tapered duct (6) and contacts the end of the second cylinder (2).

6. A gas dilution method, based on the gas dilution apparatus according to any one of claims 1-5, characterized in that, include: First, extract and discharge the gas: direct the opening end of the second cylinder (2) toward the area where the gas needs to be extracted, connect the exhaust port (12) on the first cylinder (1) to the return airway, move the shielding component (4), and shield the air inlet (11) on the first cylinder (1) through the shielding component (4). At this time, the exhaust port (12) on the first cylinder (1) is in the open state. As the shielding component (4) slides along the inner side of the first cylinder (1), it drives the ventilation duct (3) to rotate synchronously, thereby driving the conical pipe (6) to rotate synchronously in the first conical channel (21), so that the injection hole (61) on the conical pipe (6) is misaligned with the injection channel (71), thereby blocking the injection channel (71) through the outer side of the conical pipe (6) after the exhaust port (12) is opened; Then the fan (5) is started to rotate forward, creating a negative pressure in the first cylinder (1), so that the gas is drawn in from the second conical channel (22) inside the second cylinder (2), and then drawn into the first cylinder (1) through the conical pipe (6) and the ventilation pipe (3), and then enters the return airway from the exhaust port (12) and is finally discharged from the roadway; Next, the gas is injected and diluted: after the blower (5) rotates forward for a period of time and the gas concentration in the area where the gas needs to be extracted is greatly reduced, the shielding component (4) is turned in the opposite direction again so that the shielding component (4) blocks the exhaust port (12) on the first cylinder (1). At this time, the air inlet (11) on the first cylinder (1) is in the open state. As the shielding component (4) slides along the inner side of the first cylinder (1) in the reverse direction, the ventilation duct (3) rotates synchronously in the reverse direction, which in turn drives the conical pipe (6) to rotate synchronously in the reverse direction in the first conical channel (21), so that the injection hole (61) on the conical pipe (6) is finally aligned and connected with the injection channel (71), so that the compressed air entering the high-pressure air inlet chamber (7) can be injected into the conical pipe (6) along the injection channel (71) and through the injection hole (61), and finally ejected from the second conical channel (22), which can spray and dilute the area after gas extraction, thereby reducing the concentration of gas; At the same time, the fan (5) is started to rotate in the opposite direction. The fan (5) draws air from inside the tunnel through the air inlet (11), and then enters the conical pipe (6) together with the injected compressed air through the ventilation pipe (3), and finally ejects them together from the second conical channel (22).

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