Slag suction mechanism, shaft boring machine

Abstract

The application provides a slag suction mechanism and a shaft tunneling machine. The slag suction mechanism comprises a slag suction port and a slag suction pipe. A continuous conveying flow channel is formed in the slag suction port. The conveying flow channel comprises an arc-shaped turning section to smoothly change the conveying direction of the slag. The flow area of the conveying flow channel continuously decreases along the conveying direction of the slag. The inlet of the slag suction port faces the slag production area of the cutting drum. The inlet end of the slag suction pipe is sealingly connected to the outlet end of the slag suction port to convey the gas-slag mixed flow outward.

Description

Technical Field

[0001] At least one embodiment of this application relates to the field of shaft construction technology, and in particular to a slag suction mechanism and a shaft tunneling machine. Background Technology

[0002] Shaft boring machines (MBMs) combine traditional shaft construction with tunnel boring machine (TBM) technology, offering advantages such as construction safety and high excavation efficiency. They are widely used in deep underground space development, mineral mining, energy, and national defense infrastructure construction. In shaft excavation operations, the muck removal system significantly impacts overall construction efficiency. Currently, muck removal methods used in shaft construction include slurry pump circulation, chain bucket machines, vertical belt conveyors, and screw conveyors, among others. Pneumatic muck removal technology, with its flexible muck suction, strong geological adaptability, and ability to achieve long-distance vertical muck removal, is suitable for deep shaft excavation scenarios.

[0003] In related technologies, the muck suction port is set up as a separate device and is not integrated with the cutting operation components. During tunneling operations, the cutting arm needs to drive the cutting components to complete various movements such as circumferential rotation and swing. The relative position and distance between the separately set muck suction port and the cutting components continuously change with the arm's posture, making it difficult to timely suck up and discharge the muck generated during cutting. This easily leads to muck accumulation at the excavation face, thereby reducing the overall muck removal efficiency and tunneling progress. At the same time, the muck is prone to causing blockage of the flow channels during transportation. Summary of the Invention

[0004] To address at least one of the aforementioned and other technical problems in the prior art, this application provides a slag suction mechanism and a shaft tunneling machine that reduce the resistance to slag transport and achieve synchronous movement between the slag suction mechanism and the cutting component to stabilize slag suction.

[0005] The slag suction mechanism provided in this application includes a slag suction port and a slag suction pipe. The interior of the slag suction port forms a continuous conveying channel, which includes an arc-shaped turning section to smoothly change the conveying direction of the slag. The cross-sectional area of ​​the conveying channel continuously decreases along the conveying direction of the slag. The inlet of the slag suction port faces the slag-generating area of ​​the cutting drum. The inlet end of the slag suction pipe is sealed and connected to the outlet end of the slag suction port for conveying the gas-slag mixture outwards.

[0006] According to an embodiment of this application, the arc-shaped turning section smoothly changes the conveying direction of the gas-slag mixture from the slag-facing direction to the direction extending axially along the slag suction pipe.

[0007] According to an embodiment of this application, the lower side of the inlet end of the slag suction port is located on the lower side of the cutting drum to prevent slag from falling from the gap between the inlet end of the slag suction port and the cutting drum.

[0008] According to an embodiment of this application, the conveying channel smoothly transitions from a rectangular cross-section to a circular cross-section along the direction of slag conveying before connecting to the slag suction pipe.

[0009] According to an embodiment of this application, the slag suction mechanism includes a slag suction port, a slag suction pipe, a power unit, a controller, and a separation device. The inlet of the slag suction port is opposite to the cutting drum. The inlet of the slag suction pipe is connected to the outlet of the slag suction port. The power unit is configured to provide suction force to the slag suction port and the slag suction pipe. The controller is configured to control the power unit to drive the ambient air to carry the slag mixture into the slag mixture from the inlet of the slag suction port. The inlet of the separation device is connected to the outlet of the slag suction pipe and is configured to separate the gas-slag mixture into gaseous discharge and solid discharge.

[0010] According to an embodiment of this application, the slag suction mechanism further includes a mounting member. The mounting member is disposed on the inner sidewall of the slag suction port facing the swing arm, and extends toward the swing arm to mount the slag suction port onto the swing arm.

[0011] According to an embodiment of this application, the slag suction mechanism further includes a pressure detection device and a flow rate detection device. The pressure detection device is installed at the slag suction port and is configured to detect the negative pressure value inside the slag suction port. The flow rate detection device is installed at the slag suction port and is configured to detect the airflow velocity inside the slag suction port. The controller is further configured to adjust the suction force of the power device based on the negative pressure value detected by the pressure detection device and the airflow velocity detected by the flow rate detection device.

[0012] According to an embodiment of this application, the slag suction port includes an inlet section, a transition section, an outlet section, and an interface section connected in sequence. The inlet of the inlet section is opposite to the cutting drum. The inlet of the transition section is connected to the outlet of the inlet section, and the internal channel of the transition section smoothly curves to change the conveying direction of the slag. The inlet of the outlet section is connected to the outlet of the transition section. The interface section protrudes radially outward along the outlet section, with its inlet connected to the outlet of the outlet section and its outlet connected to the inlet of the slag suction pipe.

[0013] According to an embodiment of this application, S1 is the outlet cross-section of the inlet section, S2 is the cross-section of the transition section at a 45° angle to S1, and S3 is the outlet cross-section of the interface section. The area of ​​S1 is larger than the area of ​​S2, and the area of ​​S2 is larger than the area of ​​S3.

[0014] According to an embodiment of this application, the area of ​​S1 is 1.1-2 times the area of ​​S3. And the area of ​​S2 is 1.1-1.5 times the area of ​​S3.

[0015] According to an embodiment of this application, the slag suction port further includes a wear-resistant baffle. The wear-resistant baffle is located at the lower end of the inlet section and protrudes outward from the end face of the inlet section.

[0016] According to an embodiment of this application, the slag suction port further includes two air inlet pipes. The two air inlet pipes are symmetrically arranged on the lower sidewall of the transition section. The outer inlet of each air inlet pipe is used to connect to external compressed air, and the inner outlet of each air inlet pipe connects to the interior of the transition section. Specifically, after the power unit drives the gas-slag mixture to enter through the inlet of the slag suction port, compressed air is injected in the same direction along the conveying direction of the gas-slag mixture to accelerate the gas-slag mixture through the transition section. Furthermore, the compressed air can impact the slag accumulated inside the slag suction port to prevent blockage.

[0017] According to an embodiment of this application, the slag suction port further includes an inspection port and an inspection structure. The inspection port is located on the outer wall of the transition section away from the cutting drum. The inspection structure is configured to open or close the inspection port. When the inspection port is opened, it facilitates slag cleaning and component maintenance operations inside the slag suction port.

[0018] This application provides a shaft boring machine comprising a body, a mounting shaft, a swing arm, a cutting drum, and a slag suction mechanism. The mounting shaft is mounted on the body to move vertically along the shaft's axial direction and rotate circumferentially around the shaft's central axis. The swing arm is rotatably mounted on the mounting shaft to swing radially and axially within the shaft as it moves axially and rotates circumferentially with the mounting shaft. The cutting drum is rotatably mounted on the lower end of the swing arm and is suitable for cutting the bottom wall of the shaft to excavate downwards and produce slag. The inlet of the slag suction mechanism is opposite to the cutting drum to suction slag. The slag suction mechanism is mounted on the swing arm to move synchronously with it, such that the distance between the inlet of the slag suction mechanism and the cutting drum is constant.

[0019] According to the slag suction mechanism and shaft tunneling machine provided in this application, the slag suction mechanism adopts a continuous conveying channel with an arc-shaped turning section inside, and is combined with a structure in which the flow cross-sectional area gradually decreases along the direction of slag conveying. This can smoothly change the direction of slag conveying, gradually increase the conveying kinetic energy of the gas-slag mixture, and effectively reduce the flow loss and slag accumulation blockage risk at the turning point. At the same time, by installing the slag suction mechanism on the swing arm, the inlet of the slag suction mechanism and the cutting drum maintain a constant relative distance, ensuring that the suction negative pressure acts stably on the cutting slag-generating area. This can promptly remove the slag generated during excavation from the working face, avoid the accumulation of slag on the bottom wall of the shaft, and effectively improve the slag removal efficiency and the continuity of tunneling operations. Attached Figure Description

[0020] The above and other objects, features and advantages of this application will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:

[0021] Figure 1 This schematic diagram illustrates the tunneling posture of a shaft boring machine according to an embodiment of this application;

[0022] Figure 2This schematic diagram illustrates a perspective view of the slag suction port according to an embodiment of the present application.

[0023] Figure 3 Schematic illustration Figure 2 A three-dimensional schematic diagram of the slag suction port from another perspective;

[0024] Figure 4 A perspective view illustrating the combination of the slag suction port and the mounting component according to an embodiment of this application is shown schematically.

[0025] Figure 5 Schematic illustration Figure 4 A cross-sectional view of the slag suction port shown;

[0026] Figure 6 The diagram illustrates the flow field simulation results under one design condition.

[0027] Figure 7 The diagram illustrates the flow field simulation results under another design condition.

[0028] Figure 8 A perspective view of a transition segment according to an embodiment of this application is shown schematically;

[0029] Figure 9 A perspective view of the exit section according to an embodiment of this application is shown schematically.

[0030] In the accompanying drawings, the meanings of the reference numerals are as follows:

[0031] 1. Mounting shaft; 10. Shaft; 100. Slag; 2. Swing arm; 3. Cutting drum; 4. Slag suction mechanism;

[0032] 41. Slag suction port; 42. Slag suction pipe; 43. Installation components; 44. Pressure detection device; 45. Flow rate detection device;

[0033] 411. Entrance section; 412. Transition section; 413. Exit section; 401. First face; 402. Second face; 414. Interface section;

[0034] 415. Wear-resistant baffle; 416. Air intake pipe; 417. Inspection structure; 418. Lifting lug. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0036] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0037] All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0038] When using expressions such as "at least one of A, B, and C," the expression should generally be interpreted in accordance with the meaning commonly understood by those skilled in the art. For example, "a system having at least one of A, B, and C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or systems having A, B, and C. Similarly, when using expressions such as "at least one of A, B, or C," the expression should generally be interpreted in accordance with the meaning commonly understood by those skilled in the art. For example, "a system having at least one of A, B, or C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or systems having A, B, and C.

[0039] It should also be noted that the directional terms mentioned in the embodiments, such as "up," "down," "front," "back," "left," and "right," are only for reference to the directions in the accompanying drawings and are not intended to limit the scope of protection of this application. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or constructions will be omitted where they may cause confusion in understanding this application.

[0040] This application provides a slag suction mechanism and a shaft boring machine. The slag suction mechanism includes a slag suction port and a slag suction pipe. A continuous conveying channel is formed inside the slag suction port, which includes an arc-shaped turning section to smoothly change the conveying direction of the slag. The cross-sectional area of ​​the conveying channel continuously decreases along the conveying direction of the slag. The inlet of the slag suction port faces the slag-generating area of ​​the cutting drum. The inlet end of the slag suction pipe is sealed and connected to the outlet end of the slag suction port for conveying the gas-slag mixture outward.

[0041] According to the slag suction mechanism and shaft tunneling machine provided in this application, the slag suction mechanism adopts a continuous conveying channel with an arc-shaped turning section inside, and is combined with a structure in which the flow cross-sectional area gradually decreases along the direction of slag conveying. This can smoothly change the direction of slag conveying, gradually increase the conveying kinetic energy of the gas-slag mixed flow, and effectively reduce the flow loss and slag blockage risk at the turning point.

[0042] The shaft boring machine provided in this application embodiment is suitable for shaft construction operations in fields such as deep underground space development, metal and non-metal mineral mining, underground energy storage construction, and national defense underground facility construction. It is suitable for downward excavation of deep shafts and continuously discharges the excavated soil to the outside of the shaft through pneumatic conveying, realizing the synchronous operation of tunneling and slag removal.

[0043] In related technologies, pneumatic muck removal systems for vertical shaft excavation utilize independent muck suction ports, with the suction ports and cutting arms separately positioned. During operation, the cutting arm drives the cutting drum to perform circumferential rotation, boom extension and retraction, and swinging motions to cover the entire shaft cross-section. However, this independent arrangement causes the relative distance between the suction port and the cutting drum to fluctuate continuously with changes in the cutting arm's posture: when the cutting drum swings to the edge of the shaft, the distance between the suction port and the cutting drum increases, weakening the suction negative pressure and failing to remove muck in time; when the cutting drum approaches the center of the shaft, a small distance can easily cause large-diameter muck particles to directly impact the inner wall of the suction port, exacerbating component wear. Furthermore, the flow channels of the suction ports in related technologies use right-angle bends or simple expansion / contraction structures, which can easily lead to vortices and accumulation of muck at the bends during the turning and transporting process, causing flow channel blockage and reducing the operational stability of the muck removal system.

[0044] Figure 1 The diagram illustrates the tunneling posture of a shaft boring machine according to an embodiment of this application.

[0045] like Figure 1 As shown, the shaft boring machine provided in this application includes a machine body, a mounting shaft 1, a swing arm 2, a cutting drum 3, and a slag suction mechanism 4. The mounting shaft 1 is mounted on the machine body to move up and down along the axial direction of the shaft 10 and rotate circumferentially around the central axis of the shaft 10. The swing arm 2 is rotatably mounted on the mounting shaft 1 to swing radially and axially around the shaft 10 as it moves axially and rotates circumferentially with the mounting shaft 1. The cutting drum 3 is rotatably mounted on the lower end of the swing arm 2 and is suitable for cutting the bottom wall of the shaft 10 to excavate downwards and produce slag 100. The inlet of the slag suction mechanism 4 is opposite to the cutting drum 3 to suction the slag 100. The slag suction mechanism 4 is mounted on the swing arm 2 to move synchronously with the swing arm 2, such that the distance between the inlet of the slag suction mechanism 4 and the cutting drum 3 is constant.

[0046] In some exemplary embodiments, the machine body, as the load-bearing structure of the shaft boring machine, is integrally disposed inside the shaft 10 and can move downward along the axial direction of the shaft 10 as the excavation progresses, providing support and power output for the working components below. The mounting shaft 1 is mounted on the rotary structure at the lower part of the machine body, and on the one hand, it moves up and down axially synchronously with the machine body; on the other hand, it revolves circumferentially around the central axis of the shaft 10 along with the rotary structure of the machine body, thereby driving the lower swing arm 2, cutting drum 3 and other working components to cover the entire excavation range of the bottom wall of the shaft 10. Figure 1 Z1 in the text refers to the posture of components such as the swing arm 2 when the cutting drum 3 reaches a position on the bottom wall of the shaft 10. Figure 1 Z2 in the figure refers to the posture of components such as the swing arm 2 when the cutting drum 3 reaches another position on the bottom wall of the well barrel 10.

[0047] The upper end of the swing arm 2 is rotatably hinged to the mounting shaft 1, allowing it to swing in an arc around the central axis of the mounting shaft 1. The central axis of the mounting shaft 1 is perpendicular to... Figure 1 Extending in the direction of the paper, the swing plane of swing arm 2 is parallel to... Figure 1 With the paper surfaces aligned, the swing arm 2, after completing axial movement and circumferential rotation with the mounting shaft 1, further achieves swing adjustment in the radial and axial directions of the well barrel 10, thereby adjusting the radial position and excavation depth of the cutting operation to adapt to the cutting requirements of different positions on the bottom wall of the well barrel 10.

[0048] The cutting roller 3 has a cylindrical structure and is rotatably mounted on the lower end of the swing arm 2 around its own axis of rotation, which is perpendicular to the axis of rotation. Figure 1 The direction of the paper extends parallel to the central axis of the mounting shaft 1. Cutting blades are evenly arranged circumferentially and axially on the outer cylindrical surface of the cutting drum 3. During operation, the cutting drum 3 cuts the rock and soil at the bottom wall of the shaft 10 by its own rotation, breaking the rock and soil into slag 100 particles of varying sizes. During the cutting process, the depth of the shaft 10 continuously extends downwards, and the machine body drives the swing arm 2, cutting drum 3, and other working components to move downwards along the axial direction of the shaft 10, continuously excavating deeper until the target depth is reached to complete the shaft excavation operation.

[0049] The inlet end of the slag suction mechanism 4 is positioned opposite to the working area of ​​the cutting drum 3, and is used to transport the slag 100 generated during cutting to the outside of the well shaft through negative pressure suction. The slag suction mechanism 4 is mounted on the arm of the swing arm 2 and maintains a constant relative position with the cutting drum 3. It can synchronously complete axial movement, circumferential rotation and radial swing with the swing arm 2, so that the distance between the inlet end face of the slag suction mechanism 4 and the cutting end face of the cutting drum 3 remains constant and is not affected by the posture changes of the swing arm 2.

[0050] According to the above embodiments of this application, by installing the slag suction mechanism 4 on the swing arm 2, the inlet of the slag suction mechanism 4 and the cutting drum 3 are kept at a constant relative distance, ensuring that the suction negative pressure is stably applied to the cutting slag production area, so that the slag produced by excavation can be promptly removed from the working face, avoiding the accumulation of slag on the bottom wall of the shaft 10, and effectively improving the slag removal efficiency and the continuity of tunneling operations.

[0051] According to an embodiment of this application, the slag suction mechanism 4 includes a slag suction port 41, a slag suction pipe 42, a power unit, a controller, and a separation device. The inlet of the slag suction port 41 is opposite to the cutting drum 3. The inlet of the slag suction pipe 42 is connected to the outlet of the slag suction port 41. The power unit is configured to provide suction force to the slag suction port 41 and the slag suction pipe 42. The controller is configured to control the power unit to drive the ambient air to carry the slag 100 to form a gas-slag mixture flow, which enters from the inlet of the slag suction port 41. The inlet of the separation device is connected to the outlet of the slag suction pipe 42, and is configured to separate the gas-slag mixture flow into gaseous discharge and solid discharge.

[0052] In some exemplary embodiments, the slag suction port 41 and the slag suction pipe 42 move synchronously with the swing arm 2. The slag suction port 41 is the front-end component that directly faces the cutting operation area. The inlet end face of the slag suction port 41 is opposite to the cutting drum 3 and is the starting point for the gas-slag mixture to enter the slag suction mechanism 4. The slag suction pipe 42 is the main channel for conveying the gas-slag mixture. The inlet end of the slag suction pipe 42 is sealed and connected to the outlet end of the slag suction port 41. The extension direction of the slag suction pipe 42 is parallel to the extension direction of the swing arm 2. The slag suction pipe 42 extends to the upper part of the wellbore 10, providing a closed conveying path for the gas-slag mixture.

[0053] The power unit provides negative pressure suction force for the entire slag suction mechanism 4. For example, a high-pressure blower or a vacuum generator can be used. By creating a negative pressure environment inside the slag suction pipe 42 and the slag suction port 41, the ambient air inside the well shaft 10 is driven to carry the slag 100 to form a gas-slag mixed flow, which enters the conveying channel formed by the slag suction port 41 and the slag suction pipe 42 from the inlet of the slag suction port 41.

[0054] The controller is electrically connected to the power unit and is used to control parameters such as the start and stop of the power unit, the operating power and the suction pressure, thereby adjusting the suction force of the slag suction mechanism 4 to adapt to different tunneling conditions and slag characteristics.

[0055] The inlet of the separation device is connected to the outlet end of the slag suction pipe 42 and is located in the upper area of ​​the well shaft 10. It is used to separate the gas and slag mixture that is transported here: the gas component in the mixture is filtered and purified as a gas discharge and discharged, and the solid slag is collected as a solid discharge and transported to the outside of the well shaft 10, so as to realize the separate treatment and discharge of gas and solid.

[0056] According to the above embodiments of this application, the slag suction port 41 is arranged with the inlet facing the cutting drum 3, which can accurately target the cutting and slag-producing area and promptly suck up the slag 100 generated by cutting, reducing the slag 100 from falling to the bottom of the well. The slag suction pipe 42 connects to the slag suction port 41 to form a closed continuous conveying channel. With the help of the power unit to provide stable suction force, the controller to regulate the operating parameters, and the separation device to complete the gas-slag two-phase separation, a complete pneumatic slag discharge closed loop is formed, realizing the continuous and efficient conveying of slag 100 and ensuring the operational stability of the slag suction mechanism 4.

[0057] Figure 2 The illustration shows a perspective view of the slag suction port according to an embodiment of the present application. Figure 3 Schematic illustration Figure 2 A three-dimensional schematic diagram of the slag suction port from another perspective. Figure 4 A perspective view illustrating the combination of the slag suction port and the mounting component according to an embodiment of this application is shown.

[0058] like Figures 2-4 As shown, the slag suction mechanism 4 also includes a pressure detection device 44 and a flow rate detection device 45. The pressure detection device 44 is installed at the slag suction port 41 and is configured to detect the negative pressure value inside the slag suction port 41. The flow rate detection device 45 is installed at the slag suction port 41 and is configured to detect the airflow velocity inside the slag suction port 41. The controller is further configured to adjust the suction force of the power unit based on the negative pressure value detected by the pressure detection device 44 and the airflow velocity detected by the flow rate detection device 45.

[0059] In some exemplary embodiments, the slag suction port 41 has two opposing sidewalls. A pressure detection device 44 is installed on one sidewall of the slag suction port 41, with its detection end extending into the interior of the slag suction port 41. This device is used to detect the negative pressure value inside the slag suction port 41 in real time, reflecting the suction pressure state of the slag suction mechanism 4. A flow rate detection device 45 is installed on the other sidewall of the slag suction port 41, with its detection end extending into the interior of the slag suction port 41. This device is used to detect the airflow velocity inside the slag suction port 41 in real time, reflecting the conveying rate of the gas-slag mixture.

[0060] The controller is electrically connected to the pressure detection device 44 and the flow velocity detection device 45 respectively. It can receive real-time data detected by the pressure detection device 44 and the flow velocity detection device 45, and dynamically adjust the output power of the power unit according to the changes in negative pressure value and airflow velocity: when the negative pressure value decreases and the airflow velocity decreases, it indicates that the amount of slag has increased or the conveying resistance has increased. The controller controls the power unit to increase the suction force to ensure the conveying capacity. When the negative pressure value is too high and the airflow velocity is too fast, it indicates that the amount of slag is too small. The controller controls the power unit to appropriately reduce the power to save energy.

[0061] According to the above embodiments of this application, by combining dual-parameter detection of pressure and flow rate with closed-loop control, dynamic adaptive adjustment of suction force is achieved, which optimizes system energy consumption and improves operational economy while ensuring slag discharge efficiency.

[0062] Please refer to Figure 1 , Figure 4 As shown, the slag suction mechanism 4 also includes a mounting member 43. The mounting member 43 is provided on the inner side wall of the slag suction port 41 facing the swing arm 2, and the mounting member 43 extends toward the swing arm 2 to mount the slag suction port 41 onto the swing arm 2.

[0063] In some exemplary embodiments, the mounting member 43 is disposed on the inner sidewall of the slag suction port 41 facing the swing arm 2. The mounting member 43 protrudes from the inner sidewall of the slag suction port 41 and extends toward the swing arm 2. The extended end of the mounting member 43 forms a mounting surface adapted to the shape of the swing arm 2. The slag suction port 41 is firmly installed on the swing arm 2 by bolt connection, welding or other fixing methods. The length and connection position of the mounting member 43 are precisely designed to ensure that after the slag suction port 41 is installed, the inlet of the slag suction port 41 and the cutting drum 3 maintain a preset slag suction distance, while ensuring that the connection strength is sufficient to withstand the vibration and impact loads during the tunneling process.

[0064] According to the above embodiments of this application, the slag suction port 41 and the swing arm 2 are rigidly connected by the mounting component 43, which ensures the synchronicity of the movement and the stability of the position of the slag suction port 41 and the swing arm 2, and avoids the slag suction port 41 from shifting or shaking during operation.

[0065] Figure 5 Schematic illustration Figure 4 The cross-sectional view of the slag suction port shown.

[0066] like Figures 2-5 As shown, the arc-shaped turning section smoothly changes the conveying direction of the gas-slag mixture from the slag-facing direction to the direction extending axially along the slag suction pipe. The inlet face of the slag suction port is inclined, and the lower wall at the inlet of the slag suction port protrudes beyond the upper wall in the direction towards the cutting drum to prevent slag from falling from the gap between the slag suction port inlet and the cutting drum. Along the slag conveying direction, the width and length of the inlet section of the conveying channel remain constant; the length of the channel in the arc-shaped turning section gradually decreases, while the width of the channel gradually increases. The conveying channel smoothly transitions from a rectangular cross-section to a circular cross-section along the slag conveying direction before connecting to the slag suction pipe.

[0067] According to an embodiment of this application, the slag suction port 41 includes an inlet section 411, a transition section 412, an outlet section 413, and an interface section 414 connected in sequence. The inlet of the inlet section 411 is opposite to the cutting drum 3. The inlet of the transition section 412 is connected to the outlet of the inlet section 411, and the internal channel of the transition section 412 smoothly turns in an arc shape to change the conveying direction of the slag 100. The inlet of the outlet section 413 is connected to the outlet of the transition section 412. The interface section 414 protrudes radially outward along the outlet section 413, with its inlet connected to the outlet of the outlet section 413 and its outlet connected to the inlet of the slag suction pipe 42.

[0068] According to an embodiment of this application, S1 is the outlet cross-section of the inlet section 411, S2 is the cross-section of the transition section 412 at a 45° angle to S1, and S3 is the outlet cross-section of the interface section 414. The area of ​​S1 is larger than the area of ​​S2, and the area of ​​S2 is larger than the area of ​​S3.

[0069] In some exemplary embodiments, the slag suction port 41 is divided into an inlet section 411, a transition section 412, an outlet section 413 and an interface section 414 in sequence along the conveying direction of the slag 100. The sections are smoothly connected and the inner wall has no protrusions or step structures to avoid abrupt changes in the flow field.

[0070] The inlet end face of the inlet section 411 faces the working area of ​​the cutting drum 3. It is the starting section for the slag 100 and air to enter the slag suction port 41. The cross-section of the inlet section 411 is, for example, a regular shape, such as a rectangle, to ensure a large slag feeding coverage area and to match the width of the slag production area of ​​the cutting drum 3.

[0071] The inlet of transition section 412 is smoothly connected to the outlet of inlet section 411. The internal channel of transition section 412 is smoothly turned in an arc shape, which smoothly turns the conveying direction of slag 100 from the near-horizontal slag welcoming direction to the upward conveying direction extending along the slag suction pipe 42, avoiding the impact and eddy accumulation of slag 100 caused by right angle turn, and reducing the kinetic energy loss during the turning process.

[0072] The inlet of the outlet section 413 is smoothly connected to the outlet of the transition section 412. The conveying direction of the slag 100 inside the outlet section 413 tends to be stable. The outlet section 413 is a straight-extending tube. The cross-section of the outlet section 413 transitions from square to circular. It is used to smoothly guide the gas-slag mixture flow that has completed the turning to the subsequent interface section 414, and plays the role of rectifying and stabilizing the flow.

[0073] The interface section 414 protrudes radially outward along the outlet section 413 to form a flange-like structure. The inlet of the interface section 414 is connected to the outlet of the outlet section 413, and the outlet end is connected to the inlet of the suction pipe 42. The radially protruding structure is used to provide a connection sealing surface to ensure the sealing performance and structural strength of the connection between the suction port 41 and the suction pipe 42, and to prevent air leakage at the interface and loss of suction pressure.

[0074] According to the above embodiments of this application, the impact resistance and eddy current loss during the turning process of the slag 100 are reduced by the arc-shaped smooth transition flow channel design, the risk of slag accumulation at the flow channel turning point is reduced, and the smoothness of the gas-slag mixed flow is improved.

[0075] In some exemplary embodiments, please refer to Figure 3 As shown, along the conveying direction of the slag 100, the cross-sectional area of ​​the flow channel gradually decreases from the inlet section 411, transition section 412, outlet section 413 to the interface section 414. Please refer to... Figure 3 and Figure 5 As shown, along the conveying direction of the slag 100, the width and length of the inlet section 411 remain unchanged, for example, with the width direction parallel to... Figure 5 The paper direction and length direction are perpendicular to Figure 5 In the direction of the paper, the length of the transition section 412 gradually decreases and the width of the transition section 412 gradually increases. The inlet end face of the inlet section 411 is inclined so that the lower wall of the inlet section 411 protrudes from the upper wall of the inlet section 411 in the direction toward the cutting drum 3, so as to prevent the slag 100 from falling from the gap between the inlet section 411 and the cutting drum 3.

[0076] In some exemplary embodiments, S1 is the outlet section of the inlet section 411, and S1 is, for example, a rectangular plane; S2 is the section of the transition section 412 at a 45° angle to the plane S1, and S2 is, for example, located in the middle of the transition section 412; S3 is the outlet section of the interface section 414, that is, the end section where the slag suction port 41 and the slag suction pipe 42 are connected.

[0077] According to the above embodiments of this application, the area of ​​S1 is larger than that of S2, so that the inlet end of the slag suction port 41 has a sufficient suction coverage area, which can gather and collect the slag 100 generated by the cutting drum 3 over a large area; at the same time, as the gas-slag mixed flow enters the transition section 412 from the inlet section 411, the flow velocity gradually increases as the channel cross-section steadily narrows, providing sufficient conveying kinetic energy for the slag 100 to pass through the arc-shaped transition section 412, reducing the settling and accumulation of the slag 100 in the transition section 412. The area of ​​S2 is larger than that of S3, so that after the gas-slag mixed flow completes the turning after passing through the transition section 412, the flow velocity further increases as the channel cross-section continues to narrow, entering the slag suction pipe 42 with a stable high flow velocity, reserving sufficient conveying power for subsequent long-distance vertical lifting.

[0078] Therefore, the channel inside the slag suction port 41 has a gradually narrowing shape along the conveying direction of the slag 100, and the channel cross-section has no abrupt steps, which can effectively reduce the pressure loss inside the slag suction port 41, improve the smoothness of the gas-slag mixed flow, reduce the risk of flow channel blockage, and improve the overall slag discharge efficiency.

[0079] According to the embodiments of this application, the area of ​​S1 is 1.1-2 times the area of ​​S3, and the area of ​​S2 is 1.1-1.5 times the area of ​​S3. This size ratio has been verified by flow field simulation: if the area of ​​S1 is too large, the airflow velocity at the inlet is too low, which cannot effectively entrain large-diameter slag particles and easily causes slag settling; if the area of ​​S1 is too small, the slag inlet coverage is insufficient, which easily causes slag to overflow and scatter. As a turning section, if the area of ​​S2 is too large, it will cause the flow velocity to decrease and slag to settle and accumulate; if the area is too small, it will increase the turning resistance and aggravate component wear.

[0080] Figure 6 The diagram illustrates the flow field simulation results under one design condition. Figure 7 The diagram illustrates the flow field simulation results under another design condition.

[0081] like Figures 6-7 As shown, flow field and particle motion simulations were performed on slag suction ports 41 with different cross-sectional ratios using fluid simulation software to verify the rationality of the structural design. The particles in the simulation represent slag (the medium is air). Particle velocities are distinguished by color, with blue representing the lowest velocity, green representing a medium velocity, and red representing the highest velocity; the closer the color is to red, the higher the particle velocity.

[0082] Figure 6 The suction port 41 uses a design where the area of ​​S1 is four times that of S3, and the area of ​​S2 is twice that of S3, and the flow velocity inside the suction pipe 42 is 50 m / s. Figure 6 The simulation results show that, due to the large cross-sectional area of ​​the inlet section 411 compared to the transition section 412, the velocity of the slag 100 decreases significantly as it flows from the inlet section 411 toward the transition section 412. A large number of solid slag particles settle and accumulate on the lower wall of the inlet section 411 and the lower wall before the turning point of the transition section 412, and cannot be carried by the airflow, forming an obvious slag accumulation area, which verifies the defects of the large cross-sectional proportion design.

[0083] Figure 7 The suction port 41 uses a design where the area of ​​S1 is 1.5 times that of S3, and the area of ​​S2 is 1.2 times that of S3, while the flow velocity inside the suction pipe 42 remains at 50 m / s. Figure 7 The simulation results show that the slag particles at the transition section 412 still have a high velocity, and the solid slag particles can smoothly pass through the channel in the entire slag suction port 41 with the airflow without obvious settling and accumulation, which verifies the rationality of the cross-sectional ratio design and the excellent anti-clogging effect of this application.

[0084] Please refer to Figures 3-4As shown, the slag suction port 41 also includes a wear-resistant baffle 415. The wear-resistant baffle 415 is located at the lower end of the inlet section 411 and protrudes outward from the end face of the inlet section 411 so that the slag 100 generated by the cutting drum 3 is collected at the inlet of the slag suction port 41.

[0085] In some exemplary embodiments, a wear-resistant baffle 415 is disposed at the lower edge of the inlet section 411, that is, at the front end of the lower wall of the inlet section 411 away from the transition section 412. The wear-resistant baffle 415 is made of a wear-resistant material, such as high manganese steel or wear-resistant alloy, and is detachably installed at the lower end of the inlet section 411 by means of bolt connection, facilitating individual replacement after wear. The wear-resistant baffle 415 protrudes from the lower edge of the inlet section 411 in the direction toward the cutting drum 3 to further prevent the slag 100 from falling from the gap between the inlet section 411 and the cutting drum 3. Furthermore, the wear-resistant baffle 415 is inclined downwards to avoid obstructing the cutting operation of the cutting drum 3.

[0086] According to the above embodiments of this application, the slag 100 generated by the cutting drum 3 tends to fall downwards under the influence of gravity. The wear-resistant baffle 415 can catch the slag 100 below, gathering the falling slag 100 in front of the inlet section 411 so that the slag 100 can be sucked and transported by the slag suction mechanism 4, preventing the slag 100 from falling to the bottom wall of the shaft 10 and improving the collection efficiency of the slag 100. At the same time, the wear-resistant baffle 415 is located at the lower end of the slag suction port 41. During the process of adjusting the cutting depth in the tunneling operation, it may come into contact with the rock and soil at the bottom wall of the shaft 10 and scrape against it. The wear-resistant material can resist the frictional wear with the rock and soil at the bottom of the shaft, avoid the rapid wear and failure of the wear-resistant baffle 415, extend the service life of the component, and maintain a stable slag gathering and blocking effect for a long time.

[0087] Please refer to Figure 2 , Figure 4 As shown, the slag suction port 41 also includes two air inlet pipes 416. The two air inlet pipes 416 are symmetrically arranged on the lower side wall of the transition section 412. The outer inlet of each air inlet pipe 416 is used to connect to external compressed air, and the inner outlet of each air inlet pipe 416 connects to the interior of the transition section 412. When the power unit drives the gas-slag mixture to enter through the inlet of the slag suction port 41, compressed air is injected in the same direction as the conveying direction of the gas-slag mixture to accelerate the gas-slag mixture through the transition section 412. The compressed air can also impact the slag 100 accumulated inside the slag suction port 41 to prevent blockage inside the slag suction port 41.

[0088] In some exemplary embodiments, two air inlet pipes 416 are arranged at intervals on the outer side wall of the lower part of the transition section 412, away from the swing arm 2. The outer inlet of each air inlet pipe 416 extends outside the slag suction port 41 for connection to an external compressed air pipeline. The inner outlet of each air inlet pipe 416 communicates with the interior of the transition section 412. Furthermore, the extension direction of each air inlet pipe 416 is arranged approximately along the conveying direction of the gas-slag mixture flow, ensuring that compressed air is injected into the interior of the slag suction port 41 in the same direction along the conveying direction.

[0089] According to the above embodiments of this application, compressed air is injected into the slag suction port 41 in the same direction through the air inlet pipe 416, which accelerates the conveying speed of the gas-slag mixture in the transition section 412, replenishes the kinetic energy of the slag 100 after the turn, and reduces the risk of slag accumulation. When slag 100 accumulates and blocks the inside of the slag suction port 41, high-pressure compressed air can be introduced to impact and disperse the accumulated slag 100 using high-speed airflow, thereby clearing the blockage.

[0090] Please refer to Figure 2 , Figure 4 As shown, the slag suction port 41 also includes an inspection port and an inspection structure 417. The inspection port is located on the outer side wall of the transition section 412 away from the cutting drum 3. The inspection structure 417 is configured to open or close the inspection port. When the inspection port is opened, it facilitates slag cleaning and component maintenance operations inside the slag suction port 41.

[0091] In some exemplary embodiments, the inspection port is located on the outer wall of the transition section 412 away from the cutting drum 3, for example, in the middle of the transition section 412. The opening size of the inspection port meets the needs of personnel and cleaning tools for insertion. The inspection structure 417 is adapted to the inspection port and can achieve sealing closure and opening of the inspection port. The inspection structure 417 includes a sealing cover plate, a sealing element, a hinge, and two fastening bolts. The hinge is located on the lower edge of the inspection port, and the lower end of the sealing cover plate is rotatably connected to the wall of the inspection port through the hinge. The sealing element is embedded in the inner end face of the sealing cover plate along the circumference of the inspection port. A fastening bolt is installed on the wall of the slag suction port 41 above the upper edge of the inspection port, and a fastening bolt is also provided on the upper part of the sealing cover plate. A locking connecting plate is provided between the two fastening bolts. By tightening the two fastening bolts, the sealing cover is pressed against the end face of the access port to achieve a sealed closure of the access port; by removing the fastening bolts and locking the connecting plate, the sealing cover can be flipped open around the hinge at the lower end to expose the inside of the access port.

[0092] According to the above embodiments of this application, when the maintenance structure 417 closes the maintenance port, it ensures a negative pressure environment inside the slag suction port 41 to avoid air leakage and loss of suction capacity. When the slag suction port 41 is blocked or internal components need to be inspected and maintained, the maintenance structure 417 can be opened to directly clean the accumulated slag 100 inside or to inspect and replace internal components.

[0093] In addition, please refer to Figure 3 As shown, the upper wall of the inlet section 411 is also provided with two lifting lugs 418. Each lifting lug 418 is a ring structure, which is suitable for lifting operations during the installation and disassembly of the slag suction port 41, and facilitates the transfer and assembly of components.

[0094] In some exemplary embodiments, the machine body serves as the main load-bearing structure of the entire machine, and is integrally mounted inside the shaft 10. The mounting shaft 1 is installed on a rotating platform at the lower part of the machine body, allowing it to move vertically along the axial direction of the shaft 10 along with the machine body, and also to revolve circumferentially around the central axis of the shaft 10 along with the rotating platform of the machine body. The upper end of the swing arm 2 is hinged to the mounting shaft 1, allowing it to pitch and swing around the axis of the mounting shaft 1. The cutting drum 3 is rotatably mounted on the front end of the swing arm 2, moving synchronously with the swing arm 2 to cut the bottom wall rock and soil of the shaft 10. The slag suction mechanism 4 is integrally fixedly installed on the side of the swing arm 2, with its inlet end facing the cutting area of ​​the cutting drum 3, maintaining a constant relative distance from the cutting drum 3. It can synchronously complete axial movement, circumferential rotation, and radial swing with the swing arm 2, achieving synchronous linkage between cutting and slag removal operations.

[0095] In some exemplary embodiments, the shaft boring machine is equipped with multiple cutting drums 3 and multiple slag suction mechanisms 4, for example, two cutting drums 3 and two slag suction mechanisms 4 are provided, with each cutting drum 3 and slag suction mechanism 4 corresponding to the other. The inlet of each slag suction mechanism 4 is directly aligned with the cutting area of ​​its corresponding cutting drum 3, and each slag suction mechanism 4 is mounted on a swing arm 2 and moves synchronously with the swing arm 2, so that the inlet of each slag suction mechanism 4 and its corresponding cutting area of ​​the cutting drum 3 always maintain a constant relative distance. During operation, the multiple cutting drums 3 simultaneously cut the bottom wall rock and soil of the shaft 10, which can effectively expand the coverage area of ​​a single cut and improve the tunneling efficiency per unit time; the slag suction mechanisms 4, which are configured one-to-one, can accurately suck up the slag generated by their corresponding cutting drums, ensuring that the slag generated by the multi-drum operation can be stably sucked out, and the slag removal effect is not reduced due to the increase in the number of drums.

[0096] According to the above embodiments of this application, by integrating the slag suction mechanism 4 and the cutting execution component on the same swing arm through the overall integrated arrangement, the relative constancy of the slag suction position and the cutting position is ensured from the overall structure, avoiding the distance fluctuation problem caused by independent arrangement, and improving the working stability of the entire slag discharge system.

[0097] Figure 8 A perspective view of a transition segment according to an embodiment of this application is shown schematically. Figure 9 A perspective view of the exit section according to an embodiment of this application is shown schematically.

[0098] like Figure 8 As shown, the transition section 412 is a hollow shell structure with a 90° circular arc bend. The inlet end is a rectangular opening with rounded corners, and its cross-sectional dimensions match the outlet end of the inlet section 411. The two are welded together in a sealed joint, with no stepped protrusions on the inner wall at the joint. The outlet end is an approximately square or standard square opening, and its cross-sectional dimensions match the inlet end of the outlet section 413. For example, the cross-sectional dimensions of the outlet end are less than or equal to the cross-sectional dimensions of the inlet end of the outlet section 413. The two are welded together in a sealed joint. The shell on the side is smoothly curved in a circular arc along the conveying direction, and the inner wall is continuous without sharp corners. This smoothly changes the conveying direction of the gas-slag mixture from the approximately horizontal direction of the slag receiving direction to the upward vertical direction extending along the slag suction pipe, avoiding vortex impact and slag accumulation caused by right-angle turns.

[0099] In some exemplary embodiments, with reference to the inlet end face of transition section 412, the inlet end is formed by a rectangular cross-section enclosed by a top wall, a bottom wall, and two opposing side walls. Along the direction of slag conveying, the top wall and the bottom wall extend in a smooth, concentric arc shape, together completing a 90° change in the conveying direction. The height of the two side walls gradually increases along the conveying direction, and the distance between the two side walls gradually decreases, so that the cross-sectional shape of the flow channel smoothly transitions from the cross-sectional shape of the inlet end to the cross-sectional shape of the outlet end.

[0100] like Figure 9 As shown, the outlet section 413 has a gradually changing cross-section. The inlet end is approximately square (rectangular) or a standard square cross-section, sealingly connecting with the outlet end of the transition section 412. The outlet end has a circular cross-section, smoothly connecting with the inlet of the interface section 414. The internal flow channel of the outlet section 413 smoothly transitions from a rectangle or square to a circle along the direction of slag conveying, with the flow area narrowing synchronously and smoothly. The inner wall has continuous, stepless protrusions. While completing the cross-sectional shape transformation, it also rectifyes and stabilizes the gas-slag mixture flow that has completed its turning, ensuring a uniform flow field distribution before entering the subsequent pipeline. The interface section 414 is integrally formed at the outlet end of the outlet section 413, protruding outward along the radial direction of the outlet section 413 to form a ring-shaped flange surface. The inner hole of the interface section 414 is coaxially connected to the circular outlet of the outlet section 413. The outer flange end face is used to connect and fasten with the inlet end of the slag suction pipe 42 by bolts, ensuring connection strength and sealing performance, and preventing air leakage at the interface during negative pressure suction.

[0101] In one embodiment, the outlet section 413 is formed by bending a single sheet of metal in one go, with the two ends of the sheet sealed together after bending. In another embodiment, the outlet section 413 is formed by splicing multiple sheets of metal around its perimeter. In both embodiments, a single sheet of metal can form multiple flat or curved surfaces after bending. For example, the outlet section 413 includes multiple first surfaces 401 and multiple second surfaces 402. The first surfaces 401 are, for example, flat, and the second surfaces 402 are, for example, a combination of multiple curved surfaces. The entrance edge of the first surface 401 forms the straight edge of the entrance section, and the exit edge of the second surface 402 forms the arc edge of the exit section.

[0102] According to the above embodiments of this application, the arc-shaped smooth turning design of the transition section 412 is combined with the cross-sectional gradual change design of the outlet section, which not only realizes the smooth conversion of the slag conveying direction, but also completes the smooth transition of the flow channel cross-sectional shape. At the same time, it ensures that the overall flow area of ​​the flow channel gradually narrows along the conveying direction. With the auxiliary force-enhancing structure at the bottom of the transition section 412, the flow resistance and slag accumulation blockage risk at the turning point and the cross-sectional change point are effectively reduced, and the smoothness of the gas-slag mixed flow and the operational stability are improved.

[0103] The embodiments of this application have been described above. However, these embodiments are merely illustrative and not intended to limit the scope of this application. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. The scope of this application is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of this application, and all such substitutions and modifications should fall within the scope of this application.

Claims

1. A slag suction mechanism, characterized in that, include: The slag suction port (41) forms a continuous conveying channel inside, the conveying channel including an arc-shaped turning section to smoothly change the conveying direction of the slag (100), and the flow cross-sectional area of ​​the conveying channel continuously decreases along the conveying direction of the slag (100), the inlet of the slag suction port (41) facing the slag-generating area of ​​the cutting drum (3); and The slag suction pipe (42) has its inlet end sealed and connected to the outlet end of the slag suction port (41) for conveying the gas-slag mixture to the outside.

2. The slag suction mechanism according to claim 1, characterized in that, The arc-shaped turning section smoothly changes the conveying direction of the gas-slag mixture from the slag-facing direction to the direction extending axially along the slag suction pipe (42).

3. The slag suction mechanism according to claim 1, characterized in that, The lower side of the inlet end of the slag suction port (41) is located on the lower side of the cutting drum (3) to prevent slag from falling from the gap between the inlet end of the slag suction port (41) and the cutting drum (3).

4. The slag suction mechanism according to claim 1, characterized in that, The conveying channel smoothly transitions from a rectangular cross-section to a circular cross-section along the direction of slag conveying before connecting to the slag suction pipe (42).

5. The slag suction mechanism according to claim 1, characterized in that, Also includes: The power unit is configured to provide suction force through a suction port (41) and a suction pipe (42); The controller is configured to control the air-slag mixture flow formed by the ambient air carrying slag (100) driven by the power unit to enter from the inlet of the slag suction port (41); The separation device, with its inlet connected to the outlet of the slag suction pipe (42), is configured to separate the gas-slag mixture into gaseous discharge and solid discharge.

6. The slag suction mechanism according to claim 5, characterized in that, Also includes: Mounting member (43) is provided on the inner side wall of the suction port (41) facing the swing arm (2). Mounting member (43) extends toward the swing arm (2) to mount the suction port (41) on the swing arm (2).

7. The slag suction mechanism according to claim 5, characterized in that, Also includes: A pressure detection device (44) is installed at the slag suction port (41) and is configured to detect the negative pressure value inside the slag suction port (41); A flow rate detection device (45) is installed at the slag suction port (41) and is configured to detect the airflow velocity inside the slag suction port (41); The controller is further configured to adjust the suction force of the power device according to the negative pressure value detected by the pressure detection device (44) and the airflow speed detected by the flow rate detection device (45).

8. The slag suction mechanism according to claim 5, characterized in that, The slag suction port (41) includes the following connected in sequence: The inlet section (411) is opposite to the cutting drum (3); The transition section (412) has an inlet connected to the outlet of the inlet section (411), and the internal channel of the transition section (412) is smoothly curved to change the conveying direction of the slag (100). The exit section (413) has an entrance connected to the exit of the transition section (412); and The interface section (414) protrudes outward radially along the outlet section (413), with the inlet connected to the outlet of the outlet section (413) and the outlet connected to the inlet of the slag suction pipe (42).

9. The slag suction mechanism according to claim 8, characterized in that, S1 is the outlet section of the inlet section (411), S2 is the section of the transition section (412) at a 45° angle to S1, and S3 is the outlet section of the interface section (414). Among them, the area of ​​S1 is greater than the area of ​​S2, and the area of ​​S2 is greater than the area of ​​S3.

10. The slag suction mechanism according to claim 9, characterized in that, The area of ​​S1 is 1.1 to 2 times the area of ​​S3; and The area of ​​S2 is 1.1 to 1.5 times the area of ​​S3.

11. The slag suction mechanism according to claim 8, characterized in that, The slag suction port (41) also includes: A wear-resistant baffle (415) is provided at the lower end of the inlet section (411), and the wear-resistant baffle (415) protrudes outward from the end face of the inlet section (411).

12. The slag suction mechanism according to claim 8, characterized in that, The slag suction port (41) also includes: Two intake pipes (416) are symmetrically arranged on the lower side wall of the transition section (412). The outer inlet of each intake pipe (416) is used to access external compressed air, and the inner outlet of each intake pipe (416) is connected to the interior of the transition section (412). In this process, after the power unit drives the gas-slag mixture to enter from the inlet of the slag suction port (41), compressed air is injected in the same direction along the conveying direction of the gas-slag mixture to help the gas-slag mixture pass through the transition section (412) faster. The compressed air can also impact the slag (100) accumulated inside the slag suction port (41) to prevent blockage inside the slag suction port (41).

13. The slag suction mechanism according to claim 8, characterized in that, The slag suction port (41) also includes: The inspection port is located on the outer side wall of the transition section (412) away from the cutting drum (3); The access structure (417) is configured to open or close the access port; When the inspection port is opened, it is convenient to carry out slag cleaning and component maintenance operations inside the slag suction port (41).

14. A vertical shaft tunneling machine, characterized in that, include: body; The mounting shaft (1) is mounted on the machine body so that it moves up and down along the axis of the well barrel (10) and rotates circumferentially around the central axis of the well barrel (10) along with the machine body; The swing arm (2) is rotatably mounted on the mounting shaft (1) about the mounting shaft (1) so as to swing in the radial and axial directions of the wellbore (10) as it moves axially and rotates circumferentially with the mounting shaft (1); A cutting drum (3), rotatably mounted on the lower end of a swing arm (2), is suitable for cutting the bottom wall of a shaft (10) to excavate downwards and produce slag (100); and According to any one of claims 1-13, the slag suction mechanism (4) has an inlet opposite to the cutting drum (3) to suction slag (100). The slag suction mechanism (4) is mounted on the swing arm (2) to move synchronously with the swing arm (2), so that the distance between the inlet of the slag suction mechanism (4) and the cutting drum (3) is constant.

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