A kind of mixed jet system dust cover is used to scrape slag device, mixed jet system and TBM

Abstract

The application provides a slag scraping device for a dust cover of a mixed jet system, the mixed jet system and a TBM, and belongs to the technical field of tunnel boring equipment. The slag scraping device comprises a support, the support comprises an arc-shaped track extending along an arc line, a rotating trolley is installed on the arc-shaped track, the rotating trolley comprises a trolley frame and a driving component for driving the trolley frame to rotate circumferentially along the arc-shaped track, a scraper is arranged on the trolley frame, and the scraper is used for scraping off the falling slag on the outer circumferential surface of the dust cover and driving the floating slag to slide off the dust cover when the trolley frame rotates circumferentially. Since the scraper rotates, the falling slag can be scraped off, and the floating slag can be directly driven to slide off the dust cover, so that the operation of water jetting for slag removal is omitted, and water resources are saved. In addition, the slag scraping device can be synchronously performed with a guniting surface smoothing device or guniting operation, so that the rebounding material falling on the surface of the dust cover is timely scraped off before solidification, a water spraying system does not need to be configured to wet the slag in advance, the structure of the mixed jet system can be simplified, and water resource waste is reduced.

Description

Technical Field

[0001] This invention relates to a slag scraper for a dust cover of a mixed spraying system, a mixed spraying system, and a TBM, belonging to the technical field of tunnel boring equipment. Background Technology

[0002] In open-face TBM tunnel construction, initial anchor-sprayed support is required to stabilize the surrounding rock. During shotcreting operations, due to uneven tunnel walls and operator errors, excessive concrete thickness may occur, and large bulges or bumps may appear in certain areas. In such cases, a smoothing device is needed to smooth the shotcrete surface. For example, the concrete scraping device, shotcreting device, and TBM disclosed in Chinese Utility Model Patent No. CN219809011U are described. The concrete scraping device is fixed to the shotcreting mechanical arm of the shotcreting bridge in the shotcreting system, enabling forward and backward movement along the tunnel excavation direction and circumferential movement across the tunnel cross-section. It can simultaneously scrape slag and smooth the shotcrete surface while performing shotcreting operations.

[0003] However, during the smoothing process, some slurry inevitably falls onto the dust cover of the shotcrete bridge. Furthermore, approximately 10%-30% of the material rebounds during the shotcrete operation, also falling onto the dust cover. Excessive accumulation of this material poses a risk of corrosion and deformation due to overload, necessitating cleaning. Manual cleaning is difficult because other operations are strictly prohibited in the sprayed area during the shotcrete operation. Since a single shotcrete operation typically takes over forty minutes, by the time manual cleaning begins, the concrete has already hardened, requiring the use of tools such as pneumatic picks and hoes. This process is extremely difficult, time-consuming, and labor-intensive.

[0004] To address the aforementioned issues, Chinese utility model patent CN218454747U discloses a TBM shotcrete system, including a protective cover (dust cover). The dust cover has an arc-shaped carriage, on which a slag-cleaning device is mounted. The slag-cleaning device includes an arc-shaped blade adapted to the outer circumference of the dust cover and a hydraulic cylinder for adjusting the pitch angle of the arc-shaped blade. The arc-shaped carriage also has water nozzles for wetting and flushing slag. During shotcreting, the slag-cleaning device is concealed beneath the arc-shaped carriage to prevent rebounding concrete from falling onto it. After shotcreting, the position of the arc-shaped blade is first adjusted, and then wetting begins via the water nozzles. After wetting, the arc-shaped carriage moves the arc-shaped blade backward to begin slag cleaning. Once it reaches its limit position, the hydraulic cylinder pushes the arc-shaped blade further backward to clean the slag. Finally, the water nozzles flush away any floating slag on the dust cover.

[0005] The slag removal device in the aforementioned patent also begins slag removal only after the grouting is completed. To reduce the difficulty of slag removal, water nozzles are used to wet the slag first, and the arc-shaped blade can only move back and forth. The slag that is scraped off also needs to be rinsed away with water. This necessary water spraying system not only makes the structure of the mixed spraying system complex, but also wastes water resources. At the same time, the method of spraying grout first and then removing slag still takes a relatively long time overall, affecting the overall operating efficiency of the TBM. Summary of the Invention

[0006] The purpose of this invention is to provide a slag scraping device for a dust cover of a mixed spraying system, so as to solve the problem that the existing slag cleaning device uses a back-and-forth slag scraping method, which causes the slag scraped off to not slide off the dust cover on its own and instead needs to be sprayed with water to wash it away, resulting in water waste; the purpose of this invention is also to provide a mixed spraying system and a TBM to solve the above problems.

[0007] To achieve the above objectives, the present invention employs the following technical solution:

[0008] A slag scraping device for a dust cover of a mixed spraying system includes a bracket for mounting outside the dust cover of the TBM mixed spraying system. The bracket includes an arc-shaped track extending along an arc, and a rotating trolley is mounted on the arc-shaped track. The rotating trolley includes a frame and a drive component for driving the frame to rotate circumferentially along the arc-shaped track. A scraper is provided on the frame, and the scraper is used to scrape off the slag falling on the outer circumferential surface of the dust cover when the frame rotates circumferentially, and to drive the floating slag to slide off the dust cover.

[0009] The beneficial effects of the above technical solution are as follows: This invention proposes a pioneering slag scraping device, wherein the bracket provides the installation foundation for the slag scraping device, the bracket is provided with an arc-shaped track, the rotating trolley is installed on the arc-shaped track, and the rotating trolley includes a drive component that can drive the frame to rotate circumferentially along the arc-shaped track. At the same time, a scraper is provided on the frame, so that the scraper can rotate with the circumferential rotation of the frame, thereby scraping off the slag on the outer circumference of the dust cover. Since the scraper rotates, it can directly drive the floating slag to slide off the dust cover, thereby eliminating the need for water spraying to flush the slag and saving water resources.

[0010] Furthermore, a drive mechanism is installed on the frame to drive the scraper to move radially along the arc track in order to adjust the distance between the scraper and the outer peripheral surface of the dust cover.

[0011] The beneficial effect of the above technical solution is that the distance between the scraper and the outer circumference of the dust cover can be adjusted appropriately according to the thickness of the slag, so as to obtain a better slag scraping effect.

[0012] Furthermore, the drive mechanism includes a drive cylinder with a telescopic rod, and a protective cover is provided on the frame to cover the drive cylinder. The telescopic rod is connected to the scraper through a connecting bracket passing through the protective cover. The perforation on the protective cover for the connecting bracket to pass through is an elongated hole extending radially along the arc-shaped track.

[0013] The advantages of the above technical solution are as follows: the use of a drive cylinder facilitates the control of the scraper's movement, and the protective cover on the frame can house the drive cylinder, preventing rebound material from entering the drive cylinder and causing jamming; it is precisely because of the protective cover that a connecting frame is also set up. The connecting frame passes through the protective cover, which facilitates the connection between the telescopic rod and the scraper. At the same time, the protective cover is provided with elongated holes to facilitate the movement of the connecting frame.

[0014] Furthermore, a movable frame is mounted on the frame along the axial direction of the circle containing the arc track, and the drive mechanism is mounted on the movable frame. The frame is provided with a drive structure for driving the movable frame to move axially.

[0015] The beneficial effect of the above technical solution is that the movable frame can drive the scraper to move axially, thereby expanding the scraping range.

[0016] Furthermore, the movable frame includes an axial rack extending along the axial direction, and the drive structure includes a drive motor and a drive gear that is pulsatorically connected to the output end of the drive motor, the drive gear meshing with the axial rack.

[0017] The advantages of the above technical solution are: the gear and rack drive is simple in structure, easy to arrange, and has good performance.

[0018] Furthermore, a fixed rail extending axially is fixedly installed on the frame, and the axial rack is guided and engaged with the fixed rail.

[0019] The beneficial effects of the above technical solution are that the rack serves both a driving and guiding function, and the structure is more compact.

[0020] Furthermore, an arc-shaped rack extending along the arc is provided on the bracket or arc-shaped track, and the driving component includes a rotary power source and a transmission gear that is connected to the output end of the rotary power source. The transmission gear meshes with the arc-shaped rack.

[0021] The advantages of the above technical solution are: the gear and rack drive is simple in structure, easy to arrange, and has good performance.

[0022] Furthermore, the support is provided with a connection structure for connecting with the inner circumferential surface of the arc-shaped carriage of the TBM spraying system for mounting the spraying robot arm, so that the support is hidden inside the arc-shaped carriage.

[0023] The beneficial effects of the above technical solution are as follows: by connecting the connecting structure to the inner circumferential surface of the arc-shaped carriage, it is convenient to install and arrange the support. At the same time, during use, the arc-shaped carriage covers the support to prevent rebound material from falling onto the support and affecting the smooth movement of the rotating trolley.

[0024] Furthermore, there are two curved tracks, each with an opening arranged opposite to the other in a C-shaped groove. The frame is equipped with wheels or sliders that are respectively embedded in the two C-shaped grooves.

[0025] The beneficial effects of the above technical solution are as follows: the wheels or sliders are embedded in two C-shaped grooves with opposite openings, which can play a better role in limiting the frame and ensure the stability and safety of movement.

[0026] Furthermore, the length of the arc track in the circumferential direction is greater than or equal to the arc length of a quarter circle and less than or equal to the arc length of half a circle.

[0027] The advantages of the above technical solution are: it avoids the slag scraping range being affected by an excessively short arc track, and it also avoids the structure becoming complex and the weight becoming too heavy due to an excessively long arc track.

[0028] To achieve the above objectives, the mixed-injection system of this invention adopts the following technical solution:

[0029] A mixed spraying system includes a dust cover and an arc-shaped carriage that is axially guided and movable outside the dust cover. A spraying robotic arm is mounted on the arc-shaped carriage. The mixed spraying system also includes a slag scraping device, which includes a bracket disposed outside the dust cover. The bracket includes an arc-shaped track extending along an arc. A rotating trolley is mounted on the arc-shaped track. The rotating trolley includes a frame and a drive component that drives the frame to rotate circumferentially along the arc-shaped track. A scraper is provided on the frame. The scraper is used to scrape off the slag falling on the outer circumferential surface of the dust cover when the frame rotates circumferentially and to drive the floating slag to slide off the dust cover.

[0030] The beneficial effects of the above technical solution are as follows: This invention proposes an improved mixed spraying system, wherein the bracket of the slag scraping device provides the installation foundation for the slag scraping device, the bracket is provided with an arc-shaped track, the rotating trolley is installed on the arc-shaped track, and the rotating trolley includes a drive component that can drive the frame to rotate circumferentially along the arc-shaped track. At the same time, a scraper is provided on the frame, so that the scraper can rotate with the circumferential rotation of the frame, thereby scraping off the slag on the outer circumference of the dust cover. Since the scraper rotates, it can directly drive the floating slag to slide off the dust cover, thereby eliminating the need for water spraying to flush the slag and saving water resources.

[0031] Furthermore, a drive mechanism is installed on the frame to drive the scraper to move radially along the arc track in order to adjust the distance between the scraper and the outer peripheral surface of the dust cover.

[0032] The beneficial effect of the above technical solution is that the distance between the scraper and the outer circumference of the dust cover can be adjusted appropriately according to the thickness of the slag, so as to obtain a better slag scraping effect.

[0033] Furthermore, the drive mechanism includes a drive cylinder with a telescopic rod, and a protective cover is provided on the frame to cover the drive cylinder. The telescopic rod is connected to the scraper through a connecting bracket passing through the protective cover. The perforation on the protective cover for the connecting bracket to pass through is an elongated hole extending radially along the arc-shaped track.

[0034] The advantages of the above technical solution are as follows: the use of a drive cylinder facilitates the control of the scraper's movement, and the protective cover on the frame can house the drive cylinder, preventing rebound material from entering the drive cylinder and causing jamming; it is precisely because of the protective cover that a connecting frame is also set up. The connecting frame passes through the protective cover, which facilitates the connection between the telescopic rod and the scraper. At the same time, the protective cover is provided with elongated holes to facilitate the movement of the connecting frame.

[0035] Furthermore, a movable frame is mounted on the frame along the axial direction of the circle containing the arc track, and the drive mechanism is mounted on the movable frame. The frame is provided with a drive structure for driving the movable frame to move axially.

[0036] The beneficial effect of the above technical solution is that the movable frame can drive the scraper to move axially, thereby expanding the scraping range.

[0037] Furthermore, the movable frame includes an axial rack extending along the axial direction, and the drive structure includes a drive motor and a drive gear that is pulsatorically connected to the output end of the drive motor, the drive gear meshing with the axial rack.

[0038] The advantages of the above technical solution are: the gear and rack drive is simple in structure, easy to arrange, and has good performance.

[0039] Furthermore, a fixed rail extending axially is fixedly installed on the frame, and the axial rack is guided and engaged with the fixed rail.

[0040] The beneficial effects of the above technical solution are that the rack serves both a driving and guiding function, and the structure is more compact.

[0041] Furthermore, an arc-shaped rack extending along the arc is provided on the bracket or arc-shaped track, and the driving component includes a rotary power source and a transmission gear that is connected to the output end of the rotary power source. The transmission gear meshes with the arc-shaped rack.

[0042] The advantages of the above technical solution are: the gear and rack drive is simple in structure, easy to arrange, and has good performance.

[0043] Furthermore, the support is provided with a connecting structure that connects to the inner circumferential surface of the arc-shaped carriage, so that the support is hidden inside the arc-shaped carriage.

[0044] The beneficial effects of the above technical solution are as follows: by connecting the connecting structure to the inner circumferential surface of the arc-shaped carriage, it is convenient to install and arrange the support. At the same time, during use, the arc-shaped carriage covers the support to prevent rebound material from falling onto the support and affecting the smooth movement of the rotating trolley.

[0045] Furthermore, there are two curved tracks, each with an opening arranged opposite to the other in a C-shaped groove. The frame is equipped with wheels or sliders that are respectively embedded in the two C-shaped grooves.

[0046] The beneficial effects of the above technical solution are as follows: the wheels or sliders are embedded in two C-shaped grooves with opposite openings, which can play a better role in limiting the frame and ensure the stability and safety of movement.

[0047] Furthermore, the length of the arc track in the circumferential direction is greater than or equal to the arc length of a quarter circle and less than or equal to the arc length of half a circle.

[0048] The advantages of the above technical solution are: it avoids the slag scraping range being affected by an excessively short arc track, and it also avoids the structure becoming complex and the weight becoming too heavy due to an excessively long arc track.

[0049] To achieve the above objectives, the TBM in this invention adopts the following technical solution:

[0050] A TBM includes a spraying system, which includes a dust cover and an arc-shaped carriage that is axially guided and movable outside the dust cover. A spraying robotic arm is mounted on the arc-shaped carriage. The spraying system also includes a slag scraping device, which includes a support frame disposed outside the dust cover. The support frame includes an arc-shaped track extending along an arc. A rotating trolley is mounted on the arc-shaped track. The rotating trolley includes a frame and a drive component that drives the frame to rotate circumferentially along the arc-shaped track. A scraper is provided on the frame. The scraper is used to scrape off the slag falling on the outer circumferential surface of the dust cover when the frame rotates circumferentially and to drive the floating slag to slide off the dust cover.

[0051] The beneficial effects of the above technical solution are as follows: This invention proposes an improved TBM, in which the bracket of the slag scraping device provides the installation foundation for the slag scraping device. The bracket is provided with an arc-shaped track, and the rotating trolley is installed on the arc-shaped track. The rotating trolley includes a drive component that can drive the frame to rotate circumferentially along the arc-shaped track. At the same time, a scraper is provided on the frame, so that the scraper can rotate with the circumferential rotation of the frame, thereby scraping off the slag on the outer circumference of the dust cover. Since the scraper rotates, it can directly drive the floating slag to slide off the dust cover, thereby eliminating the need for water spraying to flush the slag and saving water resources.

[0052] Furthermore, a drive mechanism is installed on the frame to drive the scraper to move radially along the arc track in order to adjust the distance between the scraper and the outer peripheral surface of the dust cover.

[0053] The beneficial effect of the above technical solution is that the distance between the scraper and the outer circumference of the dust cover can be adjusted appropriately according to the thickness of the slag, so as to obtain a better slag scraping effect.

[0054] Furthermore, the drive mechanism includes a drive cylinder with a telescopic rod, and a protective cover is provided on the frame to cover the drive cylinder. The telescopic rod is connected to the scraper through a connecting bracket passing through the protective cover. The perforation on the protective cover for the connecting bracket to pass through is an elongated hole extending radially along the arc-shaped track.

[0055] The advantages of the above technical solution are as follows: the use of a drive cylinder facilitates the control of the scraper's movement, and the protective cover on the frame can house the drive cylinder, preventing rebound material from entering the drive cylinder and causing jamming; it is precisely because of the protective cover that a connecting frame is also set up. The connecting frame passes through the protective cover, which facilitates the connection between the telescopic rod and the scraper. At the same time, the protective cover is provided with elongated holes to facilitate the movement of the connecting frame.

[0056] Furthermore, a movable frame is mounted on the frame along the axial direction of the circle containing the arc track, and the drive mechanism is mounted on the movable frame. The frame is provided with a drive structure for driving the movable frame to move axially.

[0057] The beneficial effect of the above technical solution is that the movable frame can drive the scraper to move axially, thereby expanding the scraping range.

[0058] Furthermore, the movable frame includes an axial rack extending along the axial direction, and the drive structure includes a drive motor and a drive gear that is pulsatorically connected to the output end of the drive motor, the drive gear meshing with the axial rack.

[0059] The advantages of the above technical solution are: the gear and rack drive is simple in structure, easy to arrange, and has good performance.

[0060] Furthermore, a fixed rail extending axially is fixedly installed on the frame, and the axial rack is guided and engaged with the fixed rail.

[0061] The beneficial effects of the above technical solution are that the rack serves both a driving and guiding function, and the structure is more compact.

[0062] Furthermore, an arc-shaped rack extending along the arc is provided on the bracket or arc-shaped track, and the driving component includes a rotary power source and a transmission gear that is connected to the output end of the rotary power source. The transmission gear meshes with the arc-shaped rack.

[0063] The advantages of the above technical solution are: the gear and rack drive is simple in structure, easy to arrange, and has good performance.

[0064] Furthermore, the support is provided with a connecting structure that connects to the inner circumferential surface of the arc-shaped carriage, so that the support is hidden inside the arc-shaped carriage.

[0065] The beneficial effects of the above technical solution are as follows: by connecting the connecting structure to the inner circumferential surface of the arc-shaped carriage, it is convenient to install and arrange the support. At the same time, during use, the arc-shaped carriage covers the support to prevent rebound material from falling onto the support and affecting the smooth movement of the rotating trolley.

[0066] Furthermore, there are two curved tracks, each with an opening arranged opposite to the other in a C-shaped groove. The frame is equipped with wheels or sliders that are respectively embedded in the two C-shaped grooves.

[0067] The beneficial effects of the above technical solution are as follows: the wheels or sliders are embedded in two C-shaped grooves with opposite openings, which can play a better role in limiting the frame and ensure the stability and safety of movement.

[0068] Furthermore, the length of the arc track in the circumferential direction is greater than or equal to the arc length of a quarter circle and less than or equal to the arc length of half a circle.

[0069] The advantages of the above technical solution are: it avoids the slag scraping range being affected by an excessively short arc track, and it also avoids the structure becoming complex and the weight becoming too heavy due to an excessively long arc track. Attached Figure Description

[0070] Figure 1 This is a front view schematic diagram of the mixed spraying system in this invention;

[0071] Figure 2 for Figure 1 Sectional view along line AA in the middle;

[0072] Figure 3 This is a perspective view of the slag scraping device in the mixing spray system of the present invention;

[0073] Figure 4 This is a front view of the slag scraping device in the mixing spray system of the present invention;

[0074] Figure 5 This is a side view of the cooperation between the support and the arc-shaped slide of the slag scraping device in the mixing spray system of the present invention;

[0075] Figure 6 for Figure 5 BB-direction sectional view in the middle;

[0076] Figure 7 This is a front sectional view of the slag scraping device in the mixing spray system of the present invention;

[0077] Figure 8 for Figure 7 CC-direction section view;

[0078] Figure 9 This is a front sectional view of the scraper mechanism of the slag scraping device in the mixing spray system of the present invention;

[0079] Figure 10 This is a top view of the scraper mechanism of the slag scraping device in the mixing spray system of the present invention;

[0080] Figure 11 This is a diagram showing the state of the scraper mechanism of the slag scraping device in the mixing spray system of the present invention before use;

[0081] Figure 12 This is a diagram showing the state of the scraper mechanism of the slag scraping device in the mixing spray system of the present invention after radial adjustment;

[0082] Figure 13 This is a diagram showing the state of the scraper mechanism of the slag scraping device in the mixing spray system of the present invention after axial adjustment.

[0083] Figure 14 This is a schematic diagram of the operation of the sprayed surface smoothing device in the spraying system of the present invention;

[0084] Figure 15 This is a schematic diagram of the operation of the slag scraping device in the mixed spraying system of the present invention.

[0085] In the diagram: 1. Shotcrete bridge; 2. Dust cover; 3. Arc-shaped carriage; 4. Shotcrete robotic arm; 5. Shotcrete surface smoothing device; 6. Slag scraping device; 61. Support frame; 611. Arc-shaped track; 6111. C-shaped groove; 612. Connecting column; 613. Arc-shaped rack; 62. Rotating trolley; 621. Car frame; 622. Traveling wheel; 623. Rotary power source; 624. Transmission gear; 625. Fixed track; 626. Axial rack; 627. Drive motor; 628. Drive gear; 63. Scraper mechanism; 631. Drive cylinder; 632. Connecting frame; 633. Scraper; 634. Protective cover; 7. Automatic rebound material collection device; 8. Tunnel. Detailed Implementation

[0086] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0087] This invention improves the slag scraping device in the TBM mixing and spraying system. The slag scraping device has a support frame including an arc-shaped track, and a scraper is set on a rotating trolley. The rotating trolley is installed on the arc-shaped track. The scraper scrapes off the slag on the outer circumferential surface of the dust cover by rotating around. The rotation of the scraper directly drives the floating slag to slide off the dust cover, thereby eliminating the need for water spraying to flush the slag and saving water resources.

[0088] Example 1 of the mixed-injection system in this invention:

[0089] like Figure 1 and Figure 2 As shown, the mixed spraying system includes a sprayed concrete bridge 1, a dust cover 2 mounted on the sprayed concrete bridge 1, and an arc-shaped slide 3 axially movable outside the dust cover 2. A sprayed concrete robotic arm 4 and a sprayed concrete surface smoothing device 5 are mounted on the arc-shaped slide 3. The sprayed concrete robotic arm 4 is used to install spray nozzles to spray concrete onto the inner wall of the tunnel 8, and the sprayed concrete surface smoothing device 5 is used to smooth the sprayed concrete surface. Both of these parts are prior art and will not be described in detail here. Additionally, an automatic rebound material collection device 7 is provided at the lower part of the sprayed concrete bridge 1. This is also prior art; please refer to patent document CN115807678A for details. This invention will not elaborate further.

[0090] The mixing spraying system of the present invention also includes a slag scraping device 6, such as Figure 3 and Figure 4 As shown, the slag scraping device 6 includes a bracket 61 for mounting outside the dust cover 2, a rotating trolley 62 mounted on the bracket 61, and a scraper mechanism 63 mounted on the rotating trolley 62. The bracket 61 includes an arc-shaped track 611 extending along an arc, and the rotating trolley 62 is mounted on the arc-shaped track 611. In one embodiment, the slag scraping device 6 is mounted on an arc-shaped carriage 3, specifically, the bracket 61 is fixed to the inner circumferential surface of the arc-shaped carriage 3, so that the bracket 61 is hidden inside the arc-shaped carriage 3. Figure 5 and Figure 6 As shown, the bracket 61 is provided with a connecting structure for connecting to the inner circumferential surface of the arc-shaped carriage 3. In one embodiment, the connecting structure is a plurality of connecting columns 612 arranged at intervals along the outer circumferential surface of the arc-shaped track 611. In other embodiments, the connecting structure can also be directly the outer circumferential surface of the arc-shaped track 611. Of course, in other embodiments, the bracket 61 can also be fixed to the outer circumferential surface of the arc-shaped carriage 3. Alternatively, an independent fixing frame can be provided for the bracket 61, without having to fix it to the arc-shaped carriage 3.

[0091] like Figure 7 As shown, the rotating trolley 62 includes a frame 621 and a drive component that drives the frame 621 to rotate circumferentially along an arc-shaped track 611. In one embodiment, wheels 622 are mounted on the frame 621, and as shown... Figure 6 As shown, there are two arc-shaped tracks 611, each with C-shaped grooves 6111 with openings facing each other. The traveling wheels 622 are embedded within these C-shaped grooves 6111, which effectively limits the movement of the frame 621, ensuring stability and safety. In other embodiments, the traveling wheels 622 can be replaced with sliders, and the grooves on the arc-shaped tracks can face radially outwards, or the grooves on the two arc-shaped tracks can be arranged opposite each other.

[0092] The bracket 61 is provided with an arc-shaped rack 613 extending along an arc. In one embodiment, such as... Figure 6 and Figure 7 As shown, the arc-shaped rack 613 is fixed to each connecting column 612 of the bracket 61. Of course, in other embodiments, the arc-shaped rack 613 can also be directly fixed to the arc-shaped track 611. The above-mentioned driving component includes a rotary power source 623 and a transmission gear 624 that is connected to the output end of the rotary power source 623. The transmission gear 624 meshes with the arc-shaped rack 613. The rotary power source 623 can be an electric motor, a hydraulic motor, or a pneumatic motor, used to control the rotation of the transmission gear 624. Under the meshing action of the arc-shaped rack 613, the driving component drives the entire frame 621 to rotate circumferentially along the arc-shaped track 611, thereby driving the scraper mechanism 63 to rotate circumferentially, realizing the cleaning of the slag on the outer circumferential surface of the dust cover 2. In other embodiments, the driving method for the circumferential movement of the rotating trolley 62 does not have to adopt a gear and rack structure. For example, an independent drive motor can be configured for the traveling wheels, and an independent braking mechanism can be configured to control the free movement of the traveling wheels and fix them in a certain position.

[0093] To ensure effective slag removal and a sufficient slag removal range, the arc track 611 is designed with a circumferential length greater than or equal to one-quarter of the circumference and less than or equal to one-half of the circumference. In specific implementations, the arc track can be one-quarter, one-third, or one-half of the circumference. This avoids the arc track being too short, which would affect the slag removal range, and also avoids the arc track being too long, which would result in a complex structure and heavy weight.

[0094] like Figure 9 , Figure 10 , Figure 11 and Figure 12As shown, the scraper mechanism 63 includes a scraper 633, which has a toothed structure. The scraper mechanism 63 also includes a drive mechanism for driving the scraper 633 to move radially along the arc-shaped track 611 to adjust the distance (2-5mm) between the scraper 633 and the outer peripheral surface of the dust cover 2. In one embodiment, the drive mechanism includes a drive cylinder 631 with a telescopic rod. The drive cylinder 631 can be a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder. A protective cover 634 is provided on the frame to cover the drive cylinder 631, preventing rebound material from entering the drive cylinder 631 and causing jamming. The telescopic end of the telescopic rod faces radially outward. The telescopic rod is connected to the scraper through a connecting bracket 632 passing through the protective cover 634. Therefore, the through hole on the protective cover 634 for the connecting bracket 632 to pass through is an elongated hole extending radially along the arc-shaped track, avoiding interference with the smooth movement of the connecting bracket 632. In other embodiments, the connecting frame can be omitted. For example, the telescopic end of the telescopic rod faces radially inward, the inner side of the protective cover is open, and the telescopic rod directly passes through the opening to connect with the scraper. Of course, the drive cylinder can also be replaced with a gear and rack structure, and the position of the scraper is adjusted by the movement of the rack. Regardless of the configuration, the protective cover can still be omitted, in which case a baffle plate can be set on the outer side of the entire scraper mechanism. In other embodiments, the drive mechanism can also be omitted, and the distance between the scraper and the outer peripheral surface of the dust cover is fixed and cannot be adjusted.

[0095] Furthermore, a movable frame is mounted on the frame 621 along the axial direction of the circle containing the arc-shaped track 611. The aforementioned drive mechanism is mounted on the movable frame, and the frame 621 is provided with a drive structure for driving the movable frame to move axially. As one embodiment, such as... Figure 8 As shown, the movable frame is an axial rack 626 extending along the axial direction, and the protective cover 634 of the drive mechanism is fixed to the end of the axial rack 626, combined with... Figure 7 As shown, a fixed track 625 extending axially is fixedly mounted on the frame 621. An axial rack 626 is guided and engaged with the fixed track 625. The aforementioned drive structure includes a drive motor 627 and a drive gear 628 that is pulsatorically connected to the output end of the drive motor 627. The drive gear 628 meshes with the axial rack 626. The drive motor 627 can be an electric motor, a hydraulic motor, or a pneumatic motor, used to control the rotation of the drive gear 628, thereby driving the axial rack 626 to move back and forth, realizing the adjustment of the axial position of the scraper mechanism 63, such as... Figure 13 As shown.

[0096] In other embodiments, the fixed track can be omitted, allowing the axial rack to directly engage with the frame guide. Alternatively, the movable frame can be a separate structure, with the axial rack additionally fixed to it. The frame engages with the fixed track guide or directly with the frame guide. In other embodiments, the drive structure may not use a rack and pinion mechanism. For example, the frame can have a telescopic drive mechanism, such as a cylinder, hydraulic cylinder, or electric actuator, which drives the scraper mechanism axially via the movable frame. This eliminates the need for a drive gear and axial rack. Alternatively, the movable frame can be omitted, with the telescopic end of the telescopic drive mechanism directly connected to the scraper mechanism. In yet another embodiment, no drive structure is required; in this case, the scraper mechanism can only rotate circumferentially and cannot move axially.

[0097] The working process of the mixed injection system in this invention is as follows:

[0098] Before performing shotcrete operations, unfold the slag collection plate of the automatic rebound material collection device 7. For example... Figure 14 As shown, during the shotcrete operation, if over-sprayed concrete or large bulges or protrusions occur, the shotcrete surface smoothing device 5 can rotate around the tunnel 8 under remote control by the operator. The scraped rebound material falls onto the dust cover 2 and the slag collection plate of the automatic rebound material collection device 7. At this time, the operator can operate the slag scraping device 6 to clean the rebound material (i.e., fallen slag) on ​​the surface of the dust cover. Figure 12 As shown, firstly, the drive cylinder 631 is controlled to adjust the distance between the scraper 633 and the arc-shaped surface of the dust cover 2 to a suitable value. Then, the rotary power source 623 is controlled to drive the rotating carriage 62 to rotate. Figure 15 As shown, the scraper 633 can move in a circular motion along the arc-shaped surface of the dust cover 2. The scraping device can be operated simultaneously with the shotcrete surface smoothing device 5 or the shotcrete operation. At this time, the rebound material that falls onto the surface of the dust cover 2 has not yet solidified. Therefore, the rotational motion of the scraper 633 can remove the rebound material that has fallen onto the surface of the dust cover 2 in time, eliminating the need for a water spraying system to pre-wet the slag. This simplifies the structure of the mixed spraying system, reduces water waste, and improves the overall operating efficiency of the TBM by spraying and scraping slag simultaneously. Furthermore, because the scraper 633 rotates in a circumferential direction, it can directly drive the scraped slag off the dust cover 2, thereby eliminating the need for water spraying to flush the slag and saving water resources.

[0099] After completing one cycle of circumferential scraping, the operator can operate the drive motor 627 to extend the scraper 633 a certain distance along the axial direction, such as... Figure 13As shown. Repeat the above rotating scraping action, and then repeat the above operation. This allows the rebound material on the surface of the dust cover 2 to be scraped off onto the slag collection plate of the automatic rebound material collection device 7 below the shotcrete bridge 1 while the shotcrete work or shotcrete surface smoothing work is being performed. For the rebound material that falls onto the slag collection plate, a high-pressure water nozzle is installed at the end of the slag collection plate. The high-pressure water washes the rebound material into the slag collection hopper below the platform, and then a crane transfers the slag collection hopper to a flatbed truck for transport out of the tunnel.

[0100] The embodiment of the slag scraping device for the dust cover of the mixed spraying system in this invention is as follows: The specific structure of the slag scraping device for the dust cover of the mixed spraying system is the same as that of the slag scraping device in the above embodiment of the mixed spraying system, and will not be repeated here.

[0101] The TBM embodiment in this invention is as follows: The TBM includes a mixed injection system, which is the same as the mixed injection system in the above embodiment, and will not be repeated here.

[0102] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A slag scraper for a dust cover in a mixed spraying system, characterized in that, The system includes a bracket for mounting outside the dust cover of the TBM spraying system. The bracket has a connecting structure for connecting to the inner circumferential surface of an arc-shaped carriage on which a spraying robot arm is mounted, allowing the bracket to be concealed within the arc-shaped carriage. The bracket includes an arc-shaped track extending along a curve, on which a rotating trolley is mounted. The rotating trolley includes a frame and a drive component for rotating the frame circumferentially along the arc-shaped track. There are two arc-shaped tracks, front and rear, each with C-shaped grooves with openings facing each other. The frame is equipped with wheels or sliders that are respectively embedded in the two C-shaped grooves. A scraper is mounted on the frame for scraping away dust from the outer circumference of the dust cover as the frame rotates circumferentially. The slag on the surface slides off the dust cover, causing floating slag to slide off. A drive mechanism is installed on the frame to drive the scraper to move radially along the arc track to adjust the distance between the scraper and the outer circumference of the dust cover. A fixed track extending axially is fixed on the frame, and an axial rack is guided and moved on the fixed track. The axial direction is the front-to-back direction. A drive motor and a drive gear connected to the output end of the drive motor are provided on the frame. The drive gear meshes with the axial rack to drive the axial rack to move back and forth. The protective cover of the drive mechanism is fixed to the front end of the axial rack. The scraper and the protective cover are located on the front side of the front arc track, and the rear end of the fixed track extends to the rear side of the rear arc track.

2. The slag scraper for the dust cover of the mixed spraying system according to claim 1, characterized in that, The width of the scraper gradually decreases from back to front.

3. The slag scraper for the dust cover of the mixed spraying system according to claim 1, characterized in that, The drive mechanism includes a drive cylinder with a telescopic rod, and a protective cover houses the drive cylinder. The telescopic rod is connected to the scraper through a connecting bracket passing through the protective cover. The perforation on the protective cover for the connecting bracket to pass through is an elongated hole extending radially along an arc track.

4. The slag scraper for the dust cover of the mixed spraying system according to any one of claims 1 to 3, characterized in that, The connection structure consists of multiple connecting columns spaced apart along the outer circumference of the arc-shaped track.

5. The slag scraper for the dust cover of the mixed spraying system according to claim 4, characterized in that, Each connecting post of the rear arc-shaped track is fixed with an arc-shaped rack extending along the arc. The driving component includes a rotary power source and a transmission gear that is connected to the output end of the rotary power source. The transmission gear meshes with the arc-shaped rack.

6. The slag scraper for the dust cover of the mixed spraying system according to any one of claims 1 to 3, characterized in that, The connecting structure is the outer circumference of an arc-shaped track.

7. The slag scraper for the dust cover of the mixed spraying system according to any one of claims 1 to 3, characterized in that, An arc-shaped rack extending along an arc is provided on the bracket or arc-shaped track. The driving component includes a rotary power source and a transmission gear that is connected to the output end of the rotary power source. The transmission gear meshes with the arc-shaped rack.

8. The slag scraper for the dust cover of the mixed spraying system according to claim 7, characterized in that, The rotational power source is an electric motor.

9. The slag scraper for the dust cover of the mixed spraying system according to any one of claims 1 to 3, characterized in that, The driving component is a drive motor independently configured for the walking wheels, and the walking wheels are also equipped with an independent braking mechanism.

10. The slag scraper for the dust cover of the mixed spraying system according to any one of claims 1 to 3, characterized in that, The length of the curved track in the circumferential direction is greater than or equal to the arc length of a quarter of a circle and less than or equal to the arc length of half a circle.

11. A mixed spraying system, comprising a dust cover and an arc-shaped carriage movably disposed outside the dust cover along an axial direction, wherein a spraying robotic arm is mounted on the arc-shaped carriage, and the mixed spraying system further comprises a slag scraping device, characterized in that, The slag scraping device includes a bracket for mounting outside the dust cover of the TBM spraying system. The bracket has a connecting structure for connecting to the inner circumferential surface of an arc-shaped carriage on which a spraying robotic arm is mounted, allowing the bracket to be concealed within the arc-shaped carriage. The bracket includes an arc-shaped track extending along a curve, on which a rotating trolley is mounted. The rotating trolley includes a frame and a drive component for rotating the frame circumferentially along the arc-shaped track. There are two arc-shaped tracks, front and rear, each with C-shaped grooves with openings facing each other. The frame is equipped with wheels or sliders that are respectively embedded in the two C-shaped grooves. A scraper is mounted on the frame for scraping off the dust cover as the frame rotates circumferentially. The slag on the outer circumference surface slides off the dust cover, along with the floating slag. A drive mechanism is installed on the frame to drive the scraper to move radially along the arc-shaped track to adjust the distance between the scraper and the outer circumference of the dust cover. A fixed track extending axially is fixed on the frame, and an axial rack is mounted on the fixed track for guiding movement. The axial direction is the front-to-back direction. A drive motor and a drive gear connected to the output end of the drive motor are provided on the frame. The drive gear meshes with the axial rack to drive the axial rack to move back and forth. The protective cover of the drive mechanism is fixed to the front end of the axial rack. The scraper and the protective cover are located on the front side of the front arc-shaped track, and the rear end of the fixed track extends to the rear side of the rear arc-shaped track.

12. The mixed-spray system according to claim 11, characterized in that, The width of the scraper gradually decreases from back to front.

13. The mixed-spray system according to claim 11, characterized in that, The drive mechanism includes a drive cylinder with a telescopic rod, and a protective cover houses the drive cylinder. The telescopic rod is connected to the scraper through a connecting bracket passing through the protective cover. The perforation on the protective cover for the connecting bracket to pass through is an elongated hole extending radially along an arc track.

14. The mixed-injection system according to any one of claims 11 to 13, characterized in that, The connection structure consists of multiple connecting columns spaced apart along the outer circumference of the arc-shaped track.

15. The mixed-spray system according to claim 14, characterized in that, Each connecting post of the rear arc-shaped track is fixed with an arc-shaped rack extending along the arc. The driving component includes a rotary power source and a transmission gear that is connected to the output end of the rotary power source. The transmission gear meshes with the arc-shaped rack.

16. The mixed-injection system according to any one of claims 11 to 13, characterized in that, The connecting structure is the outer circumference of an arc-shaped track.

17. The mixed-injection system according to any one of claims 11 to 13, characterized in that, An arc-shaped rack extending along an arc is provided on the bracket or arc-shaped track. The driving component includes a rotary power source and a transmission gear that is connected to the output end of the rotary power source. The transmission gear meshes with the arc-shaped rack.

18. The mixed-spray system according to claim 17, characterized in that, The rotational power source is an electric motor.

19. The mixed-injection system according to any one of claims 11 to 13, characterized in that, The driving component is a drive motor independently configured for the walking wheels, and the walking wheels are also equipped with an independent braking mechanism.

20. The mixed-injection system according to any one of claims 11 to 13, characterized in that, The length of the curved track in the circumferential direction is greater than or equal to the arc length of a quarter of a circle and less than or equal to the arc length of half a circle.

21. A TBM, comprising a spraying system, the spraying system including a dust cover and an arc-shaped carriage axially guided and movable outside the dust cover, a spraying robotic arm mounted on the arc-shaped carriage, the spraying system further including a slag scraper, characterized in that, The slag scraping device includes a bracket for mounting outside the dust cover of the TBM spraying system. The bracket has a connecting structure for connecting to the inner circumferential surface of an arc-shaped carriage on which a spraying robotic arm is mounted, allowing the bracket to be concealed within the arc-shaped carriage. The bracket includes an arc-shaped track extending along a curve, on which a rotating trolley is mounted. The rotating trolley includes a frame and a drive component for rotating the frame circumferentially along the arc-shaped track. There are two arc-shaped tracks, front and rear, each with C-shaped grooves with openings facing each other. The frame is equipped with wheels or sliders that are respectively embedded in the two C-shaped grooves. A scraper is mounted on the frame for scraping off the dust cover as the frame rotates circumferentially. The slag on the outer circumference surface slides off the dust cover, along with the floating slag. A drive mechanism is installed on the frame to drive the scraper to move radially along the arc-shaped track to adjust the distance between the scraper and the outer circumference of the dust cover. A fixed track extending axially is fixed on the frame, and an axial rack is mounted on the fixed track for guiding movement. The axial direction is the front-to-back direction. A drive motor and a drive gear connected to the output end of the drive motor are provided on the frame. The drive gear meshes with the axial rack to drive the axial rack to move back and forth. The protective cover of the drive mechanism is fixed to the front end of the axial rack. The scraper and the protective cover are located on the front side of the front arc-shaped track, and the rear end of the fixed track extends to the rear side of the rear arc-shaped track.

22. The TBM according to claim 21, characterized in that, The width of the scraper gradually decreases from back to front.

23. The TBM according to claim 21, characterized in that, The drive mechanism includes a drive cylinder with a telescopic rod, and a protective cover houses the drive cylinder. The telescopic rod is connected to the scraper through a connecting bracket passing through the protective cover. The perforation on the protective cover for the connecting bracket to pass through is an elongated hole extending radially along an arc track.

24. The TBM according to any one of claims 21 to 23, characterized in that, The connection structure consists of multiple connecting columns spaced apart along the outer circumference of the arc-shaped track.

25. The TBM according to claim 24, characterized in that, Each connecting post of the rear arc-shaped track is fixed with an arc-shaped rack extending along the arc. The driving component includes a rotary power source and a transmission gear that is connected to the output end of the rotary power source. The transmission gear meshes with the arc-shaped rack.

26. The TBM according to any one of claims 21 to 23, characterized in that, The connecting structure is the outer circumference of an arc-shaped track.

27. The TBM according to any one of claims 21 to 23, characterized in that, An arc-shaped rack extending along an arc is provided on the bracket or arc-shaped track. The driving component includes a rotary power source and a transmission gear that is connected to the output end of the rotary power source. The transmission gear meshes with the arc-shaped rack.

28. The TBM according to claim 27, characterized in that, The rotational power source is an electric motor.

29. The TBM according to any one of claims 21 to 23, characterized in that, The driving component is a drive motor independently configured for the walking wheels, and the walking wheels are also equipped with an independent braking mechanism.

30. The TBM according to any one of claims 21 to 23, characterized in that, The length of the curved track in the circumferential direction is greater than or equal to the arc length of a quarter of a circle and less than or equal to the arc length of half a circle.

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