Pipeline flow stabilization pilot ash conveying valve

Abstract

This utility model relates to the field of material conveying, specifically a pipeline flow-stabilizing pilot-operated ash conveying valve. It includes a conveying pipe for conveying materials, a valve body fixedly mounted on the conveying pipe, a connecting pipe connected to the upstream of a blockage-prone location on the conveying pipe, an exhaust pipe inserted into the conveying pipe on the valve body, and a high-pressure gas pipe connected to external equipment on the valve body. A control module for controlling pipeline connectivity is installed inside the valve body. This pipeline flow-stabilizing pilot-operated ash conveying valve can automatically adjust the gas supply state by sensing pressure changes within the ash conveying pipeline, effectively preventing pipeline blockage. When pipeline flow is obstructed, the increased pressure drives the internal mechanism of the valve body to actuate, achieving multi-stage airflow regulation during ash conveying, timely introducing high-pressure gas to clear blockages, and effectively preventing the cascading propagation of blockage waves, avoiding chain blockages, and improving the response speed and anti-blockage reliability of the entire ash conveying system.

Description

Technical Field

[0001] This utility model relates to the field of material conveying, specifically to a pipeline flow stabilizing and tethering pilot ash conveying valve. Background Technology

[0002] In existing pneumatic ash conveying systems, pipe blockage due to material accumulation has long been a persistent problem, severely impacting the continuity and efficiency of system operation. Traditional anti-blockage measures often employ fixed air supply or manual intervention, resulting in delayed responses and an inability to dynamically adjust airflow based on the actual flow conditions in the pipes, easily leading to gas waste or insufficient air supply. Some automatic air supply devices only achieve single-point response, lacking the ability to predict blockage trends. When local blockage occurs, they are unable to effectively prevent the blockage from spreading downstream, easily triggering cascading blockage failures. Furthermore, existing structures often rely on external control signals or power supplies, resulting in complex systems, high maintenance costs, and poor reliability in high-temperature and high-dust environments, failing to meet the requirements of modern ash conveying systems for intelligence, automation, and high stability. Therefore, overcoming these existing technical problems and deficiencies has become a key issue that needs to be addressed. Utility Model Content

[0003] The purpose of this invention is to overcome the defects described in the background art, thereby realizing a pilot-operated ash conveying valve for stable flow in pipelines. This pilot valve can automatically adjust the air supply state by sensing the pressure changes in the ash conveying pipeline, effectively preventing pipeline blockage. When the pipeline flow is obstructed, the pressure increases and drives the internal mechanism of the valve body to operate, realizing multi-stage airflow control during the ash conveying process, timely introducing high-pressure gas to clear blockages, and effectively preventing the blockage wave from propagating step by step, avoiding chain blockages, and improving the response speed and anti-blockage reliability of the entire ash conveying system.

[0004] To achieve the above-mentioned objectives, the technical solution of this utility model is: a pipeline flow stabilization and tethering pilot ash conveying valve, comprising a conveying pipe for conveying materials, a valve body fixedly installed on the conveying pipe, a connecting pipe connected to the upstream of a location prone to blockage in the conveying pipe on the valve body, an exhaust pipe inserted into the conveying pipe on the valve body, a high-pressure air pipe connected to external equipment on the valve body, and a control module for controlling the connection of the pipeline installed inside the valve body.

[0005] In the above-mentioned pipeline flow stabilization and tethering pilot ash conveying valve, the valve body is provided with multiple valves, which are respectively located at the easily blocked positions of the conveying pipe.

[0006] The valve body is a hollow cylindrical structure. The connecting pipe is located at the end of the valve body. The exhaust pipe and the high-pressure gas pipe are both connected to the side of the valve body and the connection position is close to the connecting pipe.

[0007] In the above-mentioned pipeline flow stabilization and tethering pilot ash conveying valve, the control module includes a valve plug that is coaxially slidably disposed inside the valve body, and the end of the valve plug abuts against the connecting pipe.

[0008] In the above-mentioned pipeline flow stabilization and tethering pilot ash conveying valve, an adjusting screw is threadedly connected to the end of the valve body. The end of the adjusting screw extends into the interior of the valve body. A baffle is rotatably provided at the end of the adjusting screw inside the valve body. A first spring is provided between the baffle and the valve plug.

[0009] In the above-mentioned pipeline flow stabilization and tethering pilot ash conveying valve, a fine-tuning cavity is provided at the lower part of the valve plug facing the connecting pipe. A fine-tuning plate is slidably arranged inside the fine-tuning cavity along the length of the valve body. A connecting rod is horizontally fixed at the end of the fine-tuning plate facing the connecting pipe. A guide sleeve adapted to the connecting rod is provided inside the fine-tuning cavity.

[0010] A second spring is fitted around the outside of the guide sleeve, and the two ends of the second spring abut against the inside of the fine-tuning cavity and the end of the fine-tuning plate, respectively.

[0011] In the above-mentioned pipeline flow stabilization and tethering pilot ash conveying valve, a micro-flow channel is provided on the valve plug above the fine-tuning plate, and the micro-flow channel connects the high-pressure gas pipe and the fine-tuning chamber.

[0012] A microfluidic tube is connected to the valve plug below the fine-tuning plate, and the two ends of the microfluidic tube are connected to the microfluidic cavity and the exhaust pipe, respectively.

[0013] The ends of the microfluidic channel and the microfluidic tube inside the fine-tuning cavity are blocked by the fine-tuning plate when it comes into contact with the connecting tube.

[0014] In the above-mentioned pipeline flow stabilization and tethering pilot ash conveying valve, a connecting groove is provided at the rear top of the valve plug, and a bypass pipe is connected to the top of the valve body. The two ends of the bypass pipe are respectively connected to the high-pressure gas pipe and the inside of the valve body, and the end of the bypass pipe is located in the connecting groove.

[0015] A first conduit is connected to the valve body on the side of the bypass pipe. The end of the first conduit is blocked by a valve plug that abuts against one end inside the valve body. When the valve plug moves inside the valve body, the first conduit is connected to the bypass pipe.

[0016] In the above-mentioned pipeline flow stabilization and tethering pilot ash conveying valve, a second conduit is connected to the valve body end of the connecting pipe side, and the end of the second conduit can abut against the end of the fine adjustment plate.

[0017] The other end of the first conduit is connected to the end of the second conduit installed on the valve body downstream of the delivery pipe.

[0018] In the above-mentioned pipeline flow stabilization and tethering pilot ash conveying valve, a spiral blade is provided at one end of the exhaust pipe that extends into the conveying pipe. The spiral blade is fixedly installed inside the exhaust pipe and is coaxial with the exhaust pipe. The spiral blade forms a spiral air passage at the end of the exhaust pipe.

[0019] Compared with the prior art, the pipeline flow stabilizing and tethering pilot ash conveying valve of this utility model has at least the following beneficial effects:

[0020] This utility model relates to a pipeline flow-stabilizing pilot-operated ash conveying valve. Through the design of a fine-tuning chamber, a fine-tuning plate, and a microfluidic channel, it achieves precise airflow control during the ash conveying process. During normal conveying, when the valve plug abuts against the connecting pipe, the fine-tuning plate closes the microfluidic channel and the end of the microfluidic tube, maintaining a stable system. When the pipeline pressure fluctuates slightly, the fine-tuning plate can slide within the fine-tuning chamber to adjust the opening of the microfluidic channel, enabling continuous, minute replenishment of compressed air. This effectively maintains a stable ash-to-air ratio and prevents poor material fluidization or airflow pulsation. Breaking away from the traditional fully open or fully closed pilot valve's crude operation, this valve significantly improves the stability and continuity of the conveying process, making it particularly suitable for high-concentration, long-distance ash conveying conditions. It effectively reduces the risk of pipe blockage and increases conveying efficiency per unit time.

[0021] This utility model's pipeline flow-stabilizing pilot-operated ash conveying valve constructs a pressure signal transmission chain between valves. By setting a first conduit and a second conduit between each valve body and controlling their opening and closing using the valve plug's action, automatic linkage response between upstream and downstream valves is achieved. When the upstream ash conveying pipeline shows signs of blockage and pressure increases, the valve plug of the upstream valve moves, connecting the first conduit and the bypass pipe through a connecting groove. High-pressure gas is transmitted through the bypass pipe and the first conduit to the second conduit of the downstream valve, pushing its fine-tuning plate to pre-act, causing the downstream valve to enter a "standby state" in advance. This "upstream alarm, downstream pre-start" mechanism forms a pressure wave early warning system similar to a "neural network," effectively preventing the blockage wave from propagating cascading, avoiding "chain blockage," and greatly improving the response speed and anti-blockage reliability of the entire ash conveying system.

[0022] This utility model relates to a pipeline flow-stabilizing pilot-operated ash conveying valve. A spiral blade is installed at the end of the exhaust pipe, causing the high-pressure gas to form a rotating spiral airflow when injected into the ash conveying pipeline. This not only enhances the gas's ability to disturb and disperse accumulated materials, improving flushing efficiency, but also converts the kinetic energy of the airflow into circumferential motion, significantly reducing the axial impact force on the inner wall of the pipeline. This effectively alleviates the severe localized wear problem caused by traditional direct-injection air supply, extending the pipeline's service life. Simultaneously, the spiral airflow helps to uniformly suspend materials, reducing conveying resistance and indirectly reducing the energy consumption of external air pressurization equipment, achieving the dual goals of efficient flushing and energy saving.

[0023] This utility model relates to a pipeline flow-stabilizing pilot-operated ash conveying valve. It integrates components such as an adjusting screw, baffle, and first spring at the valve body end. Rotating the adjusting screw allows for precise control of the spring preload, thereby setting the valve's starting pressure threshold to adapt to different operating conditions. The adjustment process is intuitive and simple. The valve body adopts a hollow cylindrical structure with a compact layout of the connecting pipe, high-pressure gas pipe, and exhaust pipe. The valve plug slides coaxially with the valve body, ensuring smooth movement and reliable sealing. Multiple valve bodies can be modularly distributed and installed along easily clogged points in the conveying pipe (such as elbows and diameter changes) to form a distributed anti-clogging network. The overall structure contains no complex electronic components, is inherently safe, high-temperature resistant, and dustproof, making it suitable for harsh industrial environments. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the pipeline flow stabilization and tethering pilot ash conveying valve of this utility model;

[0025] Figure 2 This is a schematic diagram of the internal structure of the pipeline flow stabilization and tethering pilot ash conveying valve of this utility model;

[0026] Figure 3 This is a schematic diagram of the position of the second spring in the pipeline flow stabilization and tethering pilot ash conveying valve of this utility model.

[0027] In the diagram: 1. Delivery pipe; 2. Valve body; 3. Connecting pipe; 4. Exhaust pipe; 5. High-pressure gas pipe;

[0028] 6. Control module; 61. Valve plug; 62. Adjusting screw; 63. Baffle; 64. First spring; 65. Fine-tuning cavity; 66. Fine-tuning plate; 67. Connecting rod; 68. Guide sleeve; 69. Second spring; 70. Microfluidic channel; 71. Microfluidic tube; 72. Connecting groove; 73. Bypass tube; 74. First conduit; 75. Second conduit;

[0029] 7. Spiral blades. Detailed Implementation

[0030] The pipeline flow stabilizing and tethering pilot ash conveying valve of this utility model will be described in more detail below with reference to the accompanying drawings and specific embodiments.

[0031] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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 this utility model.

[0032] See Figures 1-3The pipeline flow stabilization pilot ash conveying valve in this embodiment automatically adjusts the air supply state by sensing pressure changes within the ash conveying pipeline, effectively preventing pipeline blockage. When the pipeline flow is obstructed, the increased pressure drives the internal mechanism of the valve body 2 to actuate, achieving multi-stage airflow control during the ash conveying process. High-pressure gas is promptly introduced to clear blockages, while simultaneously preventing the cascading propagation of blockage waves, avoiding chain blockages, and improving the response speed and anti-blockage reliability of the entire ash conveying system. In this embodiment, it mainly includes a conveying pipe 1 for conveying materials, on which valve bodies 2 are fixedly installed. Multiple valve bodies 2 are installed at easily blocked locations on the conveying pipe 1. Multiple valve bodies 2 are modularly distributed and installed along the easily blocked points (such as bends and diameter changes) of the conveying pipe 1, forming a distributed anti-blockage network. The valve body 2 is a hollow cylindrical structure, and a connecting pipe 3 is connected to the upstream of the easily blocked location on the conveying pipe 1. The connecting pipe 3 is located at the end of the valve body 2. Through the connection between the connecting pipe 3 and the interior of the conveying pipe 1, the pressure inside the conveying pipe 1 is transmitted to the interior of the valve body 2.

[0033] The valve body 2 is equipped with an exhaust pipe 4 that inserts into the conveying pipe 1. A high-pressure gas pipe 5, connecting to external equipment, is also connected to the valve body 2. Both the exhaust pipe 4 and the high-pressure gas pipe 5 are connected to the side of the valve body 2, with the connection point close to the connecting pipe 3. High-pressure gas is transmitted to the valve body 2 through the high-pressure gas pipe 5 and discharged into the blockage location of the exhaust pipe 4 through the exhaust pipe 4, thus clearing the blockage inside the conveying pipe 1. A spiral blade 7 is provided at one end of the exhaust pipe 4 that extends into the conveying pipe 1. The spiral blade 7 is fixedly installed inside the exhaust pipe 4 and coaxially arranged with it. The spiral blade 7 forms a spiral air passage at the end of the exhaust pipe 4. Through the spiral air passage formed by the spiral blade 7, the high-pressure gas forms a rotating spiral airflow when injected into the ash conveying pipe. This not only enhances the gas's ability to disturb and disperse accumulated materials, improving the blockage clearing efficiency, but also converts the kinetic energy of the airflow into circumferential motion, significantly reducing the axial impact force on the inner wall of the pipe.

[0034] To achieve automatic adjustment of the Qi replenishment status. See also Figures 1-3 In this embodiment, a control module 6 for controlling pipeline communication is disposed inside the valve body 2. The control module 6 includes a valve plug 61 that is coaxially slidably disposed inside the valve body 2, the end of which abuts against the connecting pipe 3. An adjusting screw 62 is threadedly connected to the end of the valve body 2, the end of which extends into the interior of the valve body 2. A baffle 63 is rotatably disposed at the end of the adjusting screw 62 inside the valve body 2, and a first spring 64 is disposed between the baffle 63 and the valve plug 61. By rotating the adjusting screw 62, the baffle 63 is driven to move inside the valve body 2, precisely controlling the spring preload, thereby setting the valve's starting pressure threshold to adapt to different operating conditions.

[0035] A fine-tuning cavity 65 is formed at the lower part of the valve plug 61 facing the connecting pipe 3. A fine-tuning plate 66 is slidably arranged inside the fine-tuning cavity 65 along the length of the valve body 2. A connecting rod 67 is horizontally fixed at the end of the fine-tuning plate 66 facing the connecting pipe 3. A guide sleeve 68 adapted to the connecting rod 67 is arranged inside the fine-tuning cavity 65. A second spring 69 is sleeved on the outside of the guide sleeve 68. The two ends of the second spring 69 abut against the inside of the fine-tuning cavity 65 and the end of the fine-tuning plate 66, respectively. A micro-flow channel 70 is formed on the valve plug 61 above the fine-tuning plate 66. The micro-flow channel 70 connects the high-pressure air pipe 5 and the fine-tuning cavity 65. A micro-flow tube 71 is connected to the valve plug 61 below the fine-tuning plate 66. The two ends of the micro-flow tube 71 are connected to the micro-flow cavity and the exhaust pipe 4, respectively. The ends of the microfluidic channel 70 and the microfluidic tube 71 inside the fine-tuning cavity 65 are both blocked by the fine-tuning plate 66 when it abuts against the connecting tube 3.

[0036] During normal conveying, when valve plug 61 abuts against connecting pipe 3, fine-tuning plate 66 closes microfluidic channel 70 and the end of microfluidic tube 71, and the system is in a stable state. When the pipeline pressure fluctuates slightly, fine-tuning plate 66 overcomes the resistance of second spring 69 and slides in fine-tuning cavity 65, adjusting the opening of microfluidic channel 70. At this time, high-pressure gas is conveyed from microfluidic channel 70 to fine-tuning cavity 65, and then conveyed to the interior of exhaust pipe 4 through microfluidic tube 71, realizing micro-volume and continuous replenishment of compressed air, effectively maintaining a stable ash-to-gas ratio, and preventing poor material fluidization or airflow pulsation. During this process, guide sleeve 68 and connecting rod 67 guide the movement of fine-tuning plate 66. This breaks through the traditional extensive mode of fully open and fully closed pilot valve, significantly improving the stability and continuity of conveying, effectively reducing the risk of pipe blockage, and increasing conveying efficiency per unit time. When the pipeline pressure increases, the valve plug 61 is pushed by the fine-tuning plate 66 to overcome the resistance of the first spring 64 and slide inside the valve body 2. At this time, the high-pressure air pipe 5 and the exhaust pipe 4 are fully connected, and the high-pressure gas is discharged into the interior of the delivery pipe 1 through the air pipe to clear the blockage.

[0037] To prevent the congestion wave from propagating step by step. In this embodiment, see... Figures 1-3The valve plug 61 has a connecting groove 72 at its rear top end. A bypass pipe 73 is connected to the top end of the valve body 2. Both ends of the bypass pipe 73 are connected to the high-pressure gas pipe 5 and the interior of the valve body 2, respectively. The end of the bypass pipe 73 is located within the connecting groove 72. A first conduit 74 is connected to the valve body 2 on the side of the bypass pipe 73. The end of the first conduit 74 is blocked by the valve plug 61 when it abuts against one end inside the valve body 2. When the valve plug 61 moves inside the valve body 2, the first conduit 74 connects to the bypass pipe 73. A second conduit 75 is connected to the valve body 2 end on the side of the connecting pipe 3. The end of the second conduit 75 can abut against the end of the fine-tuning plate 66. The other end of the first conduit 74 is connected to the end of the second conduit 75 located downstream of the delivery pipe 1 on the valve body 2.

[0038] By setting a first conduit 74 and a second conduit 75 between each valve body 2, and controlling their opening and closing using the action of the valve plug 61, automatic linkage response between upstream and downstream valves is achieved. When the upstream ash conveying pipeline shows signs of blockage and pressure increases, the valve plug 61 of the upstream valve moves, connecting the first conduit 74 and the bypass pipe 73 through the connecting groove 72. High-pressure gas is transmitted to the second conduit 75 of the downstream valve through the bypass pipe 73 and the first conduit 74, pushing its fine-tuning plate 66 to pre-act, connecting the micro-flow channel 70 and the micro-flow tube 71 inside the downstream valve, allowing high-pressure gas to enter the interior of the conveying pipe 1 and enter a "standby state" in advance. This "upstream alarm, downstream pre-start" mechanism forms a pressure wave early warning system similar to a "neural network," effectively preventing the blockage wave from propagating step by step, avoiding "chain blockage," and greatly improving the response speed and anti-blockage reliability of the entire ash conveying system.

[0039] The method of using the pipeline flow stabilization and tethering pilot ash conveying valve of this utility model is as follows: First, by rotating the adjusting screw 62, the baffle 63 is driven to move inside the valve body 2, and the spring preload is precisely controlled, thereby setting the valve's starting pressure threshold to adapt to different working conditions.

[0040] The pressure inside the conveying pipe 1 is transmitted to the valve body 2 through the connecting pipe 3. During normal conveying, when the valve plug 61 abuts against the connecting pipe 3, the fine-tuning plate 66 closes the microfluidic channel 70 and the end of the microfluidic tube 71, and the system is in a stable state. When the pipeline pressure fluctuates slightly, the fine-tuning plate 66 overcomes the resistance of the second spring 69 and slides in the fine-tuning cavity 65 to adjust the opening of the microfluidic channel 70. At this time, high-pressure gas is delivered from the microfluidic channel 70 to the fine-tuning cavity 65 and then delivered to the interior of the exhaust pipe 4 through the microfluidic tube 71. This achieves micro-volume, continuous replenishment of compressed air, effectively maintaining a stable ash-to-gas ratio and preventing poor material fluidization or airflow pulsation. During this process, the guide sleeve 68 and the connecting rod 67 guide the movement of the fine-tuning plate 66. This breaks through the traditional extensive mode of fully open and fully closed pilot valves, significantly improving the stability and continuity of conveying, effectively reducing the risk of pipe blockage, and increasing the conveying efficiency per unit time. When the pipeline pressure increases, the fine-tuning plate 66 pushes the valve plug 61 to overcome the resistance of the first spring 64 and slide inside the valve body 2. At this time, the high-pressure air pipe 5 and the exhaust pipe 4 are fully connected, and the high-pressure gas is discharged into the interior of the conveying pipe 1 through the air pipe to clear the blockage. During this process, the spiral air passage formed by the spiral blades 7 causes the high-pressure gas to form a rotating spiral airflow when injected into the ash conveying pipeline. This not only enhances the gas's ability to disturb and disperse the accumulated material and improves the blockage clearing efficiency, but also converts the kinetic energy of the airflow into circumferential motion, significantly reducing the axial impact force on the inner wall of the pipeline.

[0041] By setting a first conduit 74 and a second conduit 75 between each valve body 2, and controlling their opening and closing using the action of the valve plug 61, automatic linkage response between upstream and downstream valves is achieved. When the upstream ash conveying pipeline shows signs of blockage and pressure increases, the valve plug 61 of the upstream valve moves, connecting the first conduit 74 and the bypass pipe 73 through the connecting groove 72. High-pressure gas is transmitted to the second conduit 75 of the downstream valve through the bypass pipe 73 and the first conduit 74, pushing its fine-tuning plate 66 to pre-act, connecting the micro-flow channel 70 and the micro-flow tube 71 inside the downstream valve, allowing high-pressure gas to enter the interior of the conveying pipe 1 and enter a "standby state" in advance. This "upstream alarm, downstream pre-start" mechanism forms a pressure wave early warning system similar to a "neural network," effectively preventing the blockage wave from propagating step by step, avoiding "chain blockage," and greatly improving the response speed and anti-blockage reliability of the entire ash conveying system.

[0042] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The use of terms such as "a" or "an" in this specification and claims does not necessarily indicate a limitation on quantity. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0043] The exemplary embodiments of the present invention have been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of the present invention, and various combinations can be made to the various technical features and structures proposed by the present invention without exceeding the protection scope of the present invention.

Claims

1. A ducted flow plug pilot dust valve characterized by: The device includes a conveying pipe (1) for conveying materials, a valve body (2) fixedly installed on the conveying pipe (1), a connecting pipe (3) connected to the upstream of the easily blocked position of the conveying pipe (1) on the valve body (2), an exhaust pipe (4) inserted into the conveying pipe (1) on the valve body (2), a high-pressure air pipe (5) connected to external equipment on the valve body (2), and a control module (6) for controlling the connection of the pipeline inside the valve body (2).

2. A ducted flow plug pilot ash valve according to claim 1, characterised in that: The valve body (2) is provided with multiple valves, which are respectively located at the easily blocked positions of the delivery pipe (1); The valve body (2) is a hollow cylindrical structure. The connecting pipe (3) is located at the end of the valve body (2). The exhaust pipe (4) and the high-pressure air pipe (5) are both connected to the side of the valve body (2) and the connection position is close to the connecting pipe (3).

3. A ducted flow plug pilot ash valve according to claim 2, characterised in that: The control module (6) includes a valve plug (61) that is coaxially slidably disposed inside the valve body (2), and the end of the valve plug (61) abuts against the connecting pipe (3).

4. A ducted flow plug pilot ash valve according to claim 3, characterised in that: The valve body (2) is threadedly connected to an adjusting screw (62), the end of which extends into the interior of the valve body (2). A baffle (63) is rotatably provided at the end of the adjusting screw (62) inside the valve body (2), and a first spring (64) is provided between the baffle (63) and the valve plug (61).

5. A ducted flow plug pilot ash discharge valve according to claim 3, characterised in that: The valve plug (61) has a fine-tuning cavity (65) at the lower part of one end facing the connecting pipe (3). A fine-tuning plate (66) is slidably arranged inside the fine-tuning cavity (65) along the length direction of the valve body (2). A connecting rod (67) is horizontally fixed at one end of the fine-tuning plate (66) facing north towards the connecting pipe (3). A guide sleeve (68) adapted to the connecting rod (67) is arranged inside the fine-tuning cavity (65). The guide sleeve (68) is fitted with a second spring (69), the two ends of which abut against the inside of the fine-tuning cavity (65) and the end of the fine-tuning plate (66), respectively.

6. A ducted flow plug first pilot dust valve according to claim 5, characterised in that: A microfluidic channel (70) is provided on the valve plug (61) above the fine-tuning plate (66), and the microfluidic channel (70) connects the high-pressure air pipe (5) and the fine-tuning chamber (65); A microfluidic tube (71) is connected to the valve plug (61) below the fine-tuning plate (66), and the two ends of the microfluidic tube (71) are connected to the microfluidic cavity and the exhaust pipe (4) respectively. The ends of the microfluidic channel (70) and the microfluidic tube (71) inside the fine-tuning cavity (65) are blocked by the fine-tuning plate (66) when it comes into contact with the connecting tube (3).

7. A ducted flow plug first pilot dust valve according to claim 5, wherein: The valve plug (61) has a connecting groove (72) at the rear top end, and the valve body (2) has a bypass pipe (73) connected to the top end. The two ends of the bypass pipe (73) are respectively connected to the high-pressure air pipe (5) and the inside of the valve body (2), and the end of the bypass pipe (73) is located in the connecting groove (72). A first conduit (74) is connected to the valve body (2) on the side of the bypass pipe (73). The end of the first conduit (74) is blocked by a valve plug (61) that abuts against one end inside the valve body (2). When the valve plug (61) moves inside the valve body (2), the first conduit (74) is connected to the bypass pipe (73).

8. A ducted flow plug first pilot dust valve according to claim 7, characterised in that: The valve body (2) on the side of the connecting pipe (3) is connected to a second conduit (75), and the end of the second conduit (75) can abut against the end of the fine-tuning plate (66); The other end of the first conduit (74) is connected to the end of the second conduit (75) provided on the valve body (2) downstream of the delivery pipe (1).

9. The ducted plug pilot ash valve of claim 1, wherein: The exhaust pipe (4) has a spiral blade (7) at one end that extends into the delivery pipe (1). The spiral blade (7) is fixedly installed inside the exhaust pipe (4) and is coaxial with the exhaust pipe (4). The spiral blade (7) forms a spiral air passage at the end of the exhaust pipe (4).

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