Shaft excavator slag removal device and shaft excavator

Abstract

This invention relates to a slag removal device for a vertical shaft tunneling machine and the same device. The slag removal device includes a slag suction box, a crusher, and a slag discharge mechanism. The slag suction box comprises a suction box body, a grating plate, and a sealing cover. The grating plate divides the interior of the suction box body into a crushing chamber and a slag discharge chamber. A slag collection port and a slag discharge port are provided on the suction box body. The slag collection port communicates with the crushing chamber, and the slag discharge port communicates with the slag discharge chamber. The sealing cover is located outside the suction box body and forms a protective cavity around it. The crusher includes at least two crushing rollers and a drive mechanism. The crushing rollers are located inside the crushing chamber, and the drive mechanism is located inside the protective cavity and connected to the crushing rollers. The slag discharge mechanism is connected to the slag discharge port. This invention can crush large-diameter or long, narrow pebbles and rock blocks, collect the crushed rock debris, and effectively protect the drive mechanism, thereby significantly improving tunneling efficiency.

Description

Technical Field

[0001] This invention relates to the field of shaft construction technology, and in particular to a slag removal device for a shaft tunneling machine and a shaft tunneling machine. Background Technology

[0002] In recent years, with the rapid development and increasing scale of underground space utilization, caisson projects have become increasingly common. Shaft excavators, as a new type of caisson construction equipment, possess unique technical advantages compared to other traditional methods and equipment, including safety, high efficiency, small footprint, wide geological adaptability, and minimal impact on the surrounding environment. However, as the diameter and depth of caissons increase, the geological conditions also become more complex. Efficiently collecting and transporting the rock debris from the bottom of the shaft is a current challenge in mechanized shaft construction. Delayed rock debris removal can severely impact the construction progress of the shaft.

[0003] Currently, most shaft boring machines (TBMs) use slurry pumps for slag removal, but this method is incapable of removing large-diameter pebbles and large pieces of hard rock, leading to pipe blockage and slag accumulation at the bottom of the shaft. Many problems remain in practical use. Therefore, it is essential to design a slag removal device for TBMs that can remove large-diameter pebbles and rock fragments. Summary of the Invention

[0004] The purpose of this invention is to provide a slag removal device for a shaft tunneling machine and a shaft tunneling machine, which can crush large-diameter or long strip-shaped pebbles and rocks, collect the crushed rock slag, effectively protect the drive mechanism, and effectively improve tunneling efficiency.

[0005] The objective of this invention can be achieved using the following technical solutions:

[0006] This invention provides a slag removal device for a vertical shaft tunneling machine, comprising:

[0007] The slag suction box includes a slag suction box body, a grid plate with multiple filter holes, and a sealing cover. The grid plate is located inside the slag suction box body and divides the interior of the slag suction box body into a crushing chamber and a slag discharge chamber. The slag suction box body has a slag collection port and a slag discharge port. The slag collection port is connected to the crushing chamber, and the slag discharge port is connected to the slag discharge chamber. The sealing cover is located outside the slag suction box body and surrounds the slag suction box body to form a protective cavity.

[0008] A crusher includes at least two crushing rollers and a drive mechanism. The crushing rollers are located inside the crushing chamber, and the drive mechanism is located inside the protective chamber and connected to the crushing rollers.

[0009] The slag discharge mechanism is connected to the slag discharge port.

[0010] In a preferred embodiment of the present invention, the driving mechanism includes at least two driving motors, and the number of sealing covers is at least two, which together with the slag suction box form at least two protective cavities. The driving motors are located in the corresponding protective cavities. The sealing cover is a plate-shaped structure, with an annular side plate formed on the outer side of the slag suction box. The sealing cover is installed on the annular side plate by corresponding fasteners, and a plurality of first sealing rings are sandwiched between the sealing cover and the annular side plate. The sealing cover, the annular side plate, and the outer wall of the slag suction box form a protective cavity.

[0011] In a preferred embodiment of the present invention, two mounting holes are provided opposite to each other on the slag suction box. The crushing roller includes a crushing cylinder with openings at both ends. A drive shaft is provided inside the crushing cylinder. The drive shaft is circumferentially fixed to the crushing cylinder and both ends of the drive shaft can extend out of the crushing cylinder. The two ends of the drive shaft are respectively rotatably sealed to the two mounting holes. One end of the drive shaft can extend into the corresponding protective cavity and is circumferentially fixed to the output shaft of the corresponding drive motor.

[0012] In a preferred embodiment of the present invention, the end of the drive shaft is connected to the corresponding mounting hole via a bearing, and an inner end cover and an outer end cover are respectively provided on the drive shaft and on both sides of the bearing. The inner end cover has an annular structure and is located close to the protective cavity. The inner end cover is connected to the slag suction box by corresponding fasteners, and a second sealing ring is sandwiched between the inner end cover and the inner wall of the mounting hole. Both ends of the crushing cylinder are connected to connecting flanges, and an inner shaft sleeve is provided between both ends of the drive shaft and the corresponding inner end cover. The inner shaft sleeve is circumferentially fixed to the drive shaft and circumferentially fixed to the corresponding connecting flange. A third sealing ring and a dustproof ring are sandwiched between the inner end cover and the corresponding inner shaft sleeve. The dustproof ring is located close to the connecting flange.

[0013] In a preferred embodiment of the present invention, a fourth sealing ring is sandwiched between the outer end cover and the interior of the mounting hole, and a fifth sealing ring is sandwiched between the outer end cover and the drive shaft.

[0014] In a preferred embodiment of the present invention, the outer end cover near the drive motor is an annular structure, and its two ends abut against the corresponding bearing and the drive motor respectively; the outer end cover away from the drive motor is a plate-shaped structure with a receiving groove, and the corresponding end of the transmission shaft can be inserted into the corresponding receiving groove. The outer end cover can be connected to the slag suction box by corresponding fasteners.

[0015] In a preferred embodiment of the present invention, a liquid level sensor is provided at the bottom of the protective cavity, and the slag discharge device of the shaft tunneling machine also includes a controller and an alarm, the controller being electrically connected to both the liquid level sensor and the alarm.

[0016] In a preferred embodiment of the present invention, a wear-resistant layer is provided on the inner wall of the slag suction box.

[0017] In a preferred embodiment of the present invention, a plurality of first flushing nozzles and a plurality of second flushing nozzles are provided in the slag suction box. The first flushing nozzles are arranged close to the slag collection port, and the second flushing nozzles are located in the slag discharge chamber.

[0018] The present invention also provides a shaft tunneling machine, which includes a cutting arm, a cutting drum, and the above-mentioned shaft tunneling machine slag discharge device; a slag suction box is provided on the cutting arm, and the cutting drum is rotatably provided in the slag suction box and located at the front end of the slag collection port; the slag discharge mechanism includes a slag discharge pump and a slag discharge pipe, the slag discharge pump is provided on the cutting arm, the inlet of the slag discharge pump is connected to the slag discharge port through a corresponding pipeline, and the outlet of the slag discharge pump is connected to the slag discharge pipe.

[0019] As described above, the slag removal device and shaft boring machine of this invention utilize a grating plate to divide the slag suction box into a crushing chamber and a slag discharge chamber. A crushing roller is installed within the crushing chamber, allowing the crusher to perform secondary crushing of large-diameter pebbles and rock blocks cut by the shaft boring machine's cutting roller. The crushed rock debris, conforming to the required shape, passes through the grating plate and is discharged via the slag discharge mechanism. This prevents long, irregularly shaped rock blocks from entering the slag discharge mechanism and causing pump or pipe blockages, and also prevents large-diameter rock blocks from accumulating at the bottom of the shaft and affecting the tunneling progress. This achieves continuous, long-distance discharge of slag, ensuring timely and efficient removal of excavated rock debris from the shaft, effectively improving tunneling efficiency. Simultaneously, a sealing cover is installed outside the slag suction box to effectively protect the crusher's drive mechanism, isolating it from external mud and water, thus ensuring smooth construction. Attached Figure Description

[0020] The accompanying drawings are intended only to illustrate and explain the present invention and do not limit the scope of the invention.

[0021] in:

[0022] Figure 1 : Front view of the slag removal device of the vertical shaft tunneling machine provided by the present invention in conjunction with the cutting arm and the cutting drum.

[0023] Figure 2 :for Figure 1 The right view.

[0024] Figure 3 :for Figure 1 Top view.

[0025] Figure 4 :for Figure 2 A magnified view of the left end of the drive shaft located at the top.

[0026] Figure 5 :for Figure 2 A magnified view of the right end of the drive shaft located at the top.

[0027] Figure 6: A schematic diagram of the inner bushing provided by the present invention.

[0028] Figure 7 : This is a schematic diagram of the shaft tunneling machine provided by the present invention.

[0029] Explanation of icon numbers:

[0030] 1. Slag suction box; 111. Crushing chamber; 112. Slag discharge chamber; 121. Slag collection port; 122. Slag discharge port; 13. Annular side plate; 131. Oil pipe and cable interface; 141. First upper nozzle; 142. First lower nozzle; 143. Second flushing nozzle; 15. Upper inclined plate; 16. Lower inclined plate; 17. Intermediate plate; 18. Side plate; 19. Mounting bracket;

[0031] 2. Grating;

[0032] 3. Sealing cover; 31. Protective cavity;

[0033] 4. Crusher; 41. Crushing roller; 411. Crushing cylinder; 412. Connecting flange; 42. Drive motor; 43. Drive shaft; 44. Bearing; 45. Inner end cover; 451. Second sealing ring; 46. Outer end cover; 461. Fourth sealing ring; 462. Fifth sealing ring; 47. Inner bushing; 471. Third sealing ring; 472. Dustproof ring; 473. Protrusion; 48. Outer bushing;

[0034] 5. Slag discharge mechanism; 51. Slag discharge pump; 52. Slag discharge pipe;

[0035] 6. Cutting arm;

[0036] 7. Cutting roller. Detailed Implementation

[0037] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0038] like Figures 1 to 7 As shown, this embodiment provides a slag removal device for a vertical shaft tunneling machine, comprising:

[0039] The slag suction box includes a slag suction box body 1, a grid plate 2 with multiple filter holes, and a sealing cover 3. The grid plate 2 is disposed inside the slag suction box body 1 and divides the interior of the slag suction box body 1 into a crushing chamber 111 and a slag discharge chamber 112. A slag collection port 121 and a slag discharge port 122 are provided on the slag suction box body 1. The slag collection port 121 communicates with the crushing chamber 111, and the slag discharge port 122 communicates with the slag discharge chamber 112. The sealing cover 3 is disposed outside the slag suction box body 1 and surrounds the slag suction box body 1 to form a protective cavity 31.

[0040] The crusher 4 includes at least two crushing rollers 41 and a drive mechanism. The crushing rollers 41 are disposed in the crushing chamber 111, and the drive mechanism is disposed in the protective chamber 31 and connected to the crushing rollers 41.

[0041] The slag discharge mechanism 5 is connected to the slag discharge port 122.

[0042] In use, the slag suction box is installed on the cutting arm 6 of the shaft boring machine (e.g., connected by bolts) to collect the pebbles and rock debris cut by the cutting drum 7. Multiple filter holes on the grid plate 2 connect the crushing chamber 111 and the slag discharge chamber 112; the diameter of the filter holes can be adjusted according to actual conditions. The crusher 4 is a roller crusher, installed on the slag suction box, used to crush the pebbles and rock debris collected in the slag suction box; each crushing roller 41 is located inside the slag suction box 1 and between the cutting drum 7 and the grid plate 2. The aforementioned drive mechanism drives each crushing roller 41 to rotate, thereby crushing the pebbles and rock debris; the drive mechanism is installed outside the slag suction box 1 and protected by a sealing cover 3 to isolate it from external mud and water.

[0043] The cutting drum 7 at the lower end of the cutting arm 6 is installed at the front end of the slag collection port 121. Large-diameter pebbles and rock fragments cut by the cutting drum 7 are sucked into the crushing chamber 111 through the slag collection port 121 and enter the crusher 4 for secondary crushing. The slag discharge mechanism 5 is installed at the rear end of the slag discharge port 122. The crushed rock slag enters the slag discharge chamber 112 through the filter holes on the grid plate 2 and is discharged outside the well through the slag discharge mechanism 5, thereby realizing continuous and long-distance discharge of rock slag. The slag discharge device can be synchronized with the tunneling operation of the shaft boring machine to improve tunneling efficiency.

[0044] Therefore, in this embodiment, the slag discharge device uses a grid plate 2 to divide the slag suction box 1 into a crushing chamber 111 and a slag discharge chamber 112. A crushing roller 41 is installed in the crushing chamber 111. The crusher 4 can perform secondary crushing of large-diameter pebbles and rock blocks cut by the cutting roller 7 of the shaft boring machine. After crushing, the rock slag that meets the shape requirements passes through the grid plate 2 and is discharged through the slag discharge mechanism 5. This avoids long, irregularly shaped rock blocks from entering the slag discharge mechanism 5 and causing pump or pipe blockage, and also avoids large-diameter rock blocks accumulating at the bottom of the well and affecting the tunneling progress. It realizes continuous and long-distance discharge of slag, ensuring that the excavated rock slag is discharged to the outside of the well in a timely and efficient manner, effectively improving tunneling efficiency. At the same time, a sealing cover 3 is installed outside the slag suction box 1 to effectively protect the drive mechanism of the crusher 4, isolate it from external mud and water, and effectively ensure the smooth progress of construction.

[0045] In a specific implementation, for ease of processing and installation, the drive mechanism includes at least two drive motors 42, and the number of sealing covers 3 is at least two, which together with the slag suction box 1 form at least two protective cavities 31, with the drive motors 42 located in the corresponding protective cavities 31.

[0046] The number of crushing rollers 41, drive motors 42, and protective chambers 31 is the same, depending on the specific needs. For example, in this embodiment, there are two crushing rollers 41, two drive motors 42, and two protective chambers 31. The two crushing rollers 41 are arranged in parallel, and the crushing teeth on the two crushing rollers 41 can mesh with each other. The two sealing covers 3 are located at both ends of the crushing rollers 41 in the axial direction and are symmetrically distributed on both sides of the slag suction box 1. The two protective chambers 31 formed are also symmetrically distributed on both sides of the slag suction box 1.

[0047] Large-diameter pebbles and rocks enter the crushing chamber 111 through the slag collection port 121. Two crushing rollers 41 forcefully bite into the stones and rocks, squeezing and shearing them to crush them. The crushed rocks are then discharged through the grating plate 2 and the slag discharge mechanism 5. In a muddy environment, the roller crusher 4, in conjunction with the slag discharge mechanism 5, enables continuous, long-distance discharge of slag and ensures timely removal of crushed rock debris, effectively improving work efficiency.

[0048] The shape of the sealing cover 3 can be determined as needed. For example, in this embodiment, the sealing cover 3 is a plate structure, and an annular side plate 13 is formed on the outside of the slag suction box 1. The sealing cover 3 is installed on the annular side plate 13 by corresponding fasteners (e.g., bolts), and a plurality of first sealing rings are sandwiched between the sealing cover 3 and the annular side plate 13. The sealing cover 3, the annular side plate 13 and the outer wall of the slag suction box 1 enclose the above-mentioned protective cavity 31.

[0049] Generally, an oil pipe and cable interface 131 is provided at the top of the annular side plate 13 to provide power and signals to the drive motor 42. Preferably, a liquid level sensor is installed at the bottom of the protective cavity 31 (specifically at the bottom of the annular side plate 13). The shaft boring machine's slag removal device also includes a controller and an alarm, both of which are electrically connected to the liquid level sensor and the alarm. The controller is located in the main control room; if the liquid level sensor detects water leakage in the protective cavity 31, the main control room will receive an alarm signal.

[0050] Furthermore, refer to Figure 4 and Figure 5 To facilitate the connection between the drive mechanism and the crushing roller 41 and to ensure proper sealing and protection, two mounting holes are provided on the slag suction box 1 facing each other. The crushing roller 41 includes a crushing cylinder 411 with openings at both ends. A drive shaft 43 is provided inside the crushing cylinder 411. The drive shaft 43 is circumferentially fixed to the crushing cylinder 411, and both ends of the drive shaft 43 can extend out of the crushing cylinder 411. Both ends of the drive shaft 43 are rotatably and sealed to the two mounting holes respectively, and one end of the drive shaft 43 can extend into the corresponding protective cavity 31 and be circumferentially fixed to the output shaft of the corresponding drive motor 42.

[0051] Specifically, the end of the drive shaft 43 is connected to the corresponding mounting hole through the bearing 44, and an inner end cover 45 and an outer end cover 46 are respectively provided on the drive shaft 43 and on both sides of the bearing 44. The inner end cover 45 is an annular structure and is located close to the protective cavity 31. The inner end cover 45 is connected to the slag suction box 1 by corresponding fasteners (e.g., bolts), and a second sealing ring 451 is sandwiched between the inner end cover 45 and the inner wall of the mounting hole. Both ends of the crushing cylinder 411 are connected to the connecting flange 412 (e.g., by bolts). An inner bushing 47 is provided between both ends of the drive shaft 43 and the corresponding inner end cover 45. The inner bushing 47 is circumferentially fixed to the drive shaft 43 and circumferentially fixed to the corresponding connecting flange 412. A third sealing ring 471 and a dustproof ring 472 are sandwiched between the inner end cover 45 and the corresponding inner bushing 47. The dustproof ring 472 is located close to the connecting flange 412. A fourth sealing ring 461 is sandwiched between the outer end cover 46 and the interior of the mounting hole, and a fifth sealing ring 462 is sandwiched between the outer end cover 46 and the drive shaft 43.

[0052] A bearing 44 is installed between the drive shaft 43 and the slag suction box 1. An inner end cover 45 and an outer end cover 46 are installed on both sides of the bearing 44. A dustproof ring 472 and a third sealing ring 471 (e.g., a rod sealing ring) are installed between the inner end cover 45 and the inner bushing 47 to block external mud. A second sealing ring 451 is installed between the inner end cover 45 and the mounting hole, a fourth sealing ring 461 is installed between the outer end cover 46 and the mounting hole, and a fifth sealing ring 462 is installed between the outer end cover 46 and the drive shaft 43. These measures further block external mud, effectively preventing mud from entering the drive motor 42 and providing better protection for the drive motor 42.

[0053] Generally, the outer end cover 46 near the drive motor 42 is a ring structure, and its two ends abut against the corresponding bearing 44 and the drive motor 42 respectively; the outer end cover 46 away from the drive motor 42 is a plate structure with a receiving groove, and the corresponding end of the transmission shaft 43 can be inserted into the corresponding receiving groove. The outer end cover 46 can be connected to the slag suction box 1 by corresponding fasteners.

[0054] In an optional embodiment, an outer bushing 48 is provided between each end of the drive shaft 43 and the corresponding outer end cover 46, and a corresponding sealing ring is sandwiched between the outer bushing 48 and the outer end cover 46. The aforementioned fifth sealing ring 462 is installed between the outer bushing 48 and the drive shaft 43.

[0055] To facilitate circumferential fixation of the inner bushing 47 to the connecting flange 412 and the drive shaft 43, the inner bushing 47 is connected to the connecting flange 412 via a spline, and the inner bushing 47 is connected to the drive shaft 43 via a flat key. Specifically, one end of the inner bushing 47 has multiple protrusions 473 spaced apart circumferentially, and one side of the connecting flange 412 has multiple slots spaced apart circumferentially, each slot communicating with the center hole of the connecting flange 412. The protrusions 473 can be inserted into the corresponding slots. In use, the torque of the drive motor 42 is transmitted to the drive shaft 43, which transmits the torque to the inner bushing 47 via a flat key, and then the inner bushing 47 transmits the torque to the connecting flange 412 via a spline, thereby driving the crushing roller 41 to rotate.

[0056] Since the crusher 4 and the cutting drum 7 will repeatedly rub the rock slag inside the slag suction box 1, a wear-resistant layer is also provided on the inner wall of the slag suction box 1.

[0057] Furthermore, the slag suction box 1 is provided with a plurality of first flushing nozzles and a plurality of second flushing nozzles 143. The first flushing nozzles are arranged near the slag collection port 121, and the second flushing nozzles 143 are located in the slag discharge chamber 112.

[0058] Each flushing nozzle is connected to its corresponding water supply or mud pipeline. The specific number and location of the nozzles can be determined as needed. In this embodiment, the multiple first flushing nozzles include multiple first upper nozzles 141 and multiple first lower nozzles 142. The first upper nozzles 141 are located above the slag suction box, and the first lower nozzles 142 are located below the slag collection port 121. They can spray high-pressure water or mud into the cutting drum 7 and the crushing chamber 111 to flush and clean the cutting drum 7 and the crushing chamber 111 and improve the slag. The second flushing nozzle 143 is located in the slag discharge chamber 112, behind the grid plate 2, and can flush the grid plate 2 to prevent the filter holes on the grid plate 2 from being blocked.

[0059] The specific shape of the slag suction box 1 can be determined according to needs, for example, referring to Figure 1In this embodiment, the slag suction box 1 includes an upper inclined plate 15, a lower inclined plate 16, a middle plate 17, a mounting frame 19, and two side plates 18. The upper inclined plate 15 and the lower inclined plate 16 are arranged parallel to each other, and their upper ends are connected by the middle plate 17. The mounting frame 19 is connected to the upper inclined plate 15, and the upper part of the mounting frame 19 is used to connect to the lower end of the cutting arm 6 of the shaft boring machine. The two side plates 18 are installed on both sides of the mounting frame 19, the two inclined plates, and the middle plate 17. The lower end of the upper inclined plate 15 and the lower inclined plate 16 form the aforementioned slag collection port 121. The cutting drum 7 is rotatably installed in the slag suction box 1 and located in the area between the slag collection port 121 and the mounting frame 19. The lower part of the mounting frame 19 is an arc-shaped plate to match the outer contour shape of the cutting drum 7. The grating plate 2 is connected to the intermediate plate 17 and the lower inclined plate 16. The slag discharge port 122 is opened on the intermediate plate 17. The first upper nozzle 141 is provided on the mounting bracket 19, and the first lower nozzle 142 is provided on the lower inclined plate 16. The sealing cover 3 and the corresponding side plate 18 enclose the protective cavity 31.

[0060] Furthermore, this embodiment also provides a shaft tunneling machine, which includes a cutting arm 6, a cutting drum 7, and the aforementioned shaft tunneling machine slag discharge device; a slag suction box 1 is provided on the cutting arm 6, and the cutting drum 7 is rotatably provided in the slag suction box 1 and located at the front end of the slag collection port 121; the slag discharge mechanism 5 includes a slag discharge pump 51 and a slag discharge pipe 52, the slag discharge pump 51 is provided on the cutting arm 6, the inlet of the slag discharge pump 51 is connected to the slag discharge port 122 through a corresponding pipeline, and the outlet of the slag discharge pump 51 is connected to the slag discharge pipe 52.

[0061] The slag discharge pump 51 can be a slurry pump, vacuum pump, or mud pump. During operation, the slag suction box and crusher 4 move with the cutting arm 6, discharging slag synchronously with the excavation of the shaft boring machine. After the large-diameter pebbles and rock blocks cut by the cutting drum 7 enter the crushing chamber 111, the large-diameter pebbles and long, irregularly shaped rock blocks can be crushed by the roller crusher 4. With the help of the slag discharge pump 51 and the slag discharge pipe 52, the crushed rock debris is discharged outside the well through the slag discharge pump 51 and the slag discharge pipe 52, realizing continuous and long-distance discharge of slag and ensuring that the excavated rock debris is discharged outside the well in a timely and efficient manner, effectively improving the tunneling efficiency.

[0062] In summary, compared with existing technologies, the slag removal device and shaft boring machine in this embodiment, by employing a slag removal device with crushing function, can continuously and over long distances discharge large-diameter pebbles and rocks after crushing them with the crusher 4, and then ensure timely and efficient removal of excavated rock debris from the shaft with the slag pump 51. This solves the problem of slag removal for large-diameter pebbles and rocks, enabling the shaft boring machine to adapt to various geological formations and improving construction speed.

[0063] The above are merely illustrative embodiments of the present invention and are not intended to limit the scope of the invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention should fall within the scope of protection of the present invention.

Claims

1. A slag removal device for a vertical shaft tunneling machine, characterized in that, include: The slag suction box includes a slag suction box body (1), a grid plate (2) with multiple filter holes, and a sealing cover (3). The grid plate (2) is located inside the slag suction box body (1) and divides the interior of the slag suction box body (1) into a crushing chamber (111) and a slag discharge chamber (112). A slag collection port (121) and a slag discharge port (122) are provided on the slag suction box body (1). The slag collection port (121) is connected to the crushing chamber (111), and the slag discharge port (122) is connected to the slag discharge chamber (112). The sealing cover (3) is located outside the slag suction box body (1) and surrounds the slag suction box body (1) to form a protective cavity (31). The crusher (4) includes at least two crushing rollers (41) and a drive mechanism. The crushing rollers (41) are disposed in the crushing chamber (111), and the drive mechanism is disposed in the protective chamber (31) and connected to the crushing rollers (41). A slag discharge mechanism (5) is connected to the slag discharge port (122); The slag suction box (1) has two mounting holes facing each other. The crushing roller (41) includes a crushing cylinder (411) with openings at both ends. A drive shaft (43) is provided inside the crushing cylinder (411). The drive shaft (43) is circumferentially fixed to the crushing cylinder (411) and both ends of the drive shaft (43) can extend out of the crushing cylinder (411). One end of the drive shaft (43) can extend into the corresponding protective cavity (31) and be circumferentially fixed to the output shaft of the drive mechanism. The end of the drive shaft (43) is connected to the corresponding mounting hole through a bearing (44), and an inner end cover (45) and an outer end cover (46) are respectively provided on the drive shaft (43) and on both sides of the bearing (44). The inner end cover (45) is an annular structure and is located close to the protective cavity (31). The inner end cover (45) is connected to the slag suction box (1) through corresponding fasteners, and a second sealing ring (451) is sandwiched between the inner end cover (45) and the inner wall of the mounting hole. Both ends of the crushing cylinder (411) are connected to connecting flanges (412). Both ends of the drive shaft (43) are provided with inner bushings (47) between them and the corresponding inner end caps (45). The inner bushings (47) are circumferentially fixed to the drive shaft (43) and circumferentially fixed to the corresponding connecting flanges (412). A third sealing ring (471) and a dustproof ring (472) are sandwiched between the inner end caps (45) and the corresponding inner bushings (47). The dustproof ring (472) is located close to the connecting flanges (412).

2. The slag removal device for a vertical shaft tunneling machine as described in claim 1, characterized in that, The driving mechanism includes at least two driving motors (42), and the number of sealing covers (3) is at least two, which together with the slag suction box (1) form at least two protective cavities (31). The driving motors (42) are located in the corresponding protective cavities (31). The sealing cover (3) is a plate-shaped structure. An annular side plate (13) is formed on the outside of the slag suction box (1). The sealing cover (3) is installed on the annular side plate (13) by corresponding fasteners. A plurality of first sealing rings are sandwiched between the sealing cover (3) and the annular side plate (13). The sealing cover (3), the annular side plate (13) and the outer wall of the slag suction box (1) enclose the protective cavity (31).

3. The slag removal device for a vertical shaft tunneling machine as described in claim 1, characterized in that, A fourth sealing ring (461) is sandwiched between the outer end cap (46) and the interior of the mounting hole, and a fifth sealing ring (462) is sandwiched between the outer end cap (46) and the drive shaft (43).

4. The slag removal device for a vertical shaft tunneling machine as described in claim 2, characterized in that, The outer end cover (46) near the drive motor (42) is an annular structure, and its two ends abut against the corresponding bearing (44) and the drive motor (42) respectively; the outer end cover (46) away from the drive motor (42) is a plate-shaped structure with a receiving groove, and the corresponding end of the transmission shaft (43) can be inserted into the corresponding receiving groove. The outer end cover (46) can be connected to the slag suction box (1) by corresponding fasteners.

5. The slag removal device for a vertical shaft tunneling machine as described in claim 1, characterized in that, A liquid level sensor is provided at the bottom of the protective cavity (31). The slag discharge device of the shaft tunneling machine also includes a controller and an alarm. The controller is electrically connected to the liquid level sensor and the alarm.

6. The slag removal device for a vertical shaft tunneling machine as described in claim 1, characterized in that, A wear-resistant layer is provided on the inner wall of the slag suction box (1).

7. The slag removal device for a vertical shaft tunneling machine as described in claim 1, characterized in that, The slag suction box (1) is provided with a plurality of first flushing nozzles and a plurality of second flushing nozzles (143). The first flushing nozzles are arranged close to the slag collection port (121), and the second flushing nozzles (143) are located in the slag discharge chamber (112).

8. A vertical shaft tunneling machine, characterized in that, The shaft tunneling machine includes a cutting arm (6), a cutting drum (7), and a slag removal device for the shaft tunneling machine as described in any one of claims 1-7; The slag suction box (1) is mounted on the cutting arm (6), and the cutting roller (7) is rotatably mounted inside the slag suction box (1) and located at the front end of the slag collection port (121); the slag discharge mechanism (5) includes a slag discharge pump (51) and a slag discharge pipe (52). The slag discharge pump (51) is mounted on the cutting arm (6), and the inlet of the slag discharge pump (51) is connected to the slag discharge port (122) through a corresponding pipeline. The outlet of the slag discharge pump (51) is connected to the slag discharge pipe (52).

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