A mixing spraying device and a mixing spraying system

Abstract

The application belongs to the technical field of concrete support, and particularly provides a concrete spraying device and a concrete spraying system. The concrete spraying device comprises a base frame and a circumferential rotating mechanism. The circumferential rotating mechanism comprises a walking wheel frame for mounting a walking wheel. The base frame is provided with an arc-shaped track for walking movement of the circumferential rotating mechanism. The outer side of the walking wheel frame is provided with a slag baffle. The curvature of the slag baffle is not less than the curvature of the arc-shaped track. The slag baffle can cover part or all of the walking wheel frame, and the vertical projection of the slag baffle satisfies the vertical projection of the arc-shaped track. The concrete spraying system comprises the above concrete spraying device. In the application, the slag baffle is installed on the outer side of the walking wheel frame and can completely cover all the vertical areas of the arc-shaped track. The rebounding material can be completely blocked by the slag baffle, so that the rebounding material is prevented from falling on the arc-shaped track to cause the circumferential rotating mechanism to be stuck or damaged.

Description

Technical Field

[0001] This invention belongs to the field of concrete support technology, and in particular relates to a spraying device and spraying system. Background Technology

[0002] During tunnel construction, TBMs typically require initial shotcrete support to stabilize the surrounding rock and ensure the TBM can successfully traverse areas with fractured rock. To support shotcrete, TBMs are generally equipped with a mixed-spray system, whose main function is to spray concrete onto the tunnel walls, forming a concrete support layer of a certain thickness after the concrete has hardened.

[0003] A shotcrete system typically includes a shotcrete bridge and a shotcrete spraying device (concrete spraying device) capable of moving back and forth along the shotcrete bridge of a TBM. Chinese invention patent application CN108772230A discloses a concrete spraying device comprising a base frame (bridge), on which a circumferential rotating mechanism is mounted, capable of circumferential movement relative to the base frame, and an arc-shaped track is provided on the base frame for the movement of the circumferential rotating mechanism. An arc-shaped rack structure is also provided between the circumferential rotating mechanism and the base frame. The circumferential rotating mechanism is equipped with a drive device and a pinion gear; the pinion gear and rack structure mesh to drive the circumferential rotating mechanism to rotate relative to the base frame, thereby driving the nozzle assembly mounted on the circumferential rotating mechanism to achieve circumferential spraying of the tunnel.

[0004] During actual construction, due to issues such as improper concrete mix proportions, unsuitable distance between the nozzle and the tunnel wall, excessive angle between the nozzle and the tunnel wall, and non-standard operation by workers, a certain amount of rebounding concrete material is inevitable. Since the concrete material contains a significant amount of aggregate, if the rebounding material falls onto the curved track, it may cause the circumferential rotating mechanism to jam; if the rebounding material falls onto the rack, it may damage or jam the pinion gear.

[0005] Although the aforementioned mixing and spraying device is equipped with a dust cover (slag baffle) on the arc-shaped track, the dust cover is installed inside the circumferential rotating mechanism. In order to avoid the traveling wheels and traveling wheel frame of the circumferential rotating mechanism and ensure that the circumferential rotating mechanism can move stably, a certain gap must be reserved between the dust cover and the traveling wheel frame of the circumferential rotating mechanism in the axial direction. The dust cover cannot completely cover the arc-shaped track, and some rebound material still rebounds and falls on the arc-shaped track, eventually causing problems such as the device jamming. Summary of the Invention

[0006] The purpose of this invention is to provide a mixing spraying device to solve the technical problem in the prior art where the mixing spraying device mounted on a TBM cannot completely cover the arc-shaped track, making it difficult to prevent rebounding material from entering the arc-shaped track for the circumferential rotating mechanism to move. Another purpose of this invention is to provide a mixing spraying system to solve the same technical problem described above.

[0007] To achieve the above objectives, the technical solution of the mixing spray device provided by the present invention is as follows: A mixing spraying device includes a base frame and a circumferential rotating mechanism. The circumferential rotating mechanism includes a wheel frame for mounting wheels. The base frame is provided with an arc-shaped track for the circumferential rotating mechanism to move. A baffle plate is provided on the outer side of the wheel frame. The curvature of the baffle plate is not less than the curvature of the arc-shaped track. The baffle plate can cover part or all of the wheel frame. The vertical projection of the baffle plate satisfies the requirement of covering the vertical projection of the arc-shaped track.

[0008] The beneficial effects are as follows: This invention improves upon existing TBM-based spraying devices. During concrete spraying operations, because the baffle plate is located on the outside of the traveling wheel frame, the circumferential rotating mechanism can move smoothly without interference from the baffle plate, and the baffle plate completely covers the entire vertical area of ​​the curved track. Therefore, when the rebounding material falls onto the curved track, it is completely blocked by the baffle plate, thus preventing the circumferential rotating mechanism from jamming or being damaged by the rebounding material falling onto the curved track.

[0009] As a further improvement, the side where the spray nozzle is located in the mixing and spraying device is defined as the front, and the arc track includes a C-shaped track with an opening on one side, and the opening of the C-shaped track faces rearward.

[0010] The beneficial effect is that, compared with directly exposed tracks, the C-shaped track arrangement can use the track itself to block rebound material, resulting in better reliability.

[0011] As a further improvement, the slag baffle is installed on the upper side plate of the C-shaped track with the opening facing backward. The traveling wheel frame is connected to an auxiliary baffle located above the slag baffle. The auxiliary baffle is provided with a shotcrete head mounting position for installing the shotcrete head. A space is formed between the auxiliary baffle and the traveling wheel frame for the slag baffle to extend into. The traveling wheel frame is covered by the slag baffle.

[0012] The beneficial effects are: the distance between the baffle plate and the first track can be sufficiently close, ensuring a good baffle effect. Simultaneously, the auxiliary baffle can provide real-time support and obstruction to the spraying area of ​​the shotcrete head, further enhancing the protection of the curved track. Furthermore, the auxiliary baffle and the baffle plate work together to form a maze structure, further improving the actual baffle effect in the spraying area of ​​the shotcrete head.

[0013] As a further improvement, the slag baffle has an L-shaped cross-section and includes a vertical plate extending in a vertical plane and an extension plate extending in the front-rear direction. The vertical plate is fixed to the upper side plate of the C-shaped track, and the extension plate extends into the space.

[0014] The beneficial effects are: this L-shaped baffle plate, combined with the C-shaped track installation method, has good compactness, and the vertical plate can also play a role in blocking the rebound of material.

[0015] As a further improvement, the extension plate is mounted on the upright plate via a detachable connection structure.

[0016] The beneficial effect is that after a certain amount of rebound material accumulates on the extension plate, the extension plate can be removed separately for cleaning, making it easier to reuse the extension plate multiple times.

[0017] As a further improvement, the slag baffle is installed on the foundation frame or a corresponding connecting base set on the foundation frame via a detachable connection structure.

[0018] The beneficial effect is that after a certain amount of rebound material accumulates on the slag baffle, the slag baffle can be removed separately for cleaning, making it easy to reuse the slag baffle multiple times.

[0019] As a further improvement, a cable chain bracket is also installed on the basic frame. The cable chain bracket includes an arc-shaped guard plate covering the outside of the drive unit of the circumferential rotating mechanism. The arc of the guard plate is not less than the arc of the arc track.

[0020] The beneficial effects are: at this time, the guard plate can protect the cable chain and drive device where the electrical and hydraulic pipelines are installed, preventing rebound material from accumulating on the cable chain or drive device, thus further improving protection. At the same time, the guard plate can also work with the slag baffle to prevent rebound material from rebounding from the rear and entering the arc track, enhancing the slag-blocking effect on the arc track.

[0021] As a further improvement, the guard plate is mounted on the cable chain bracket via a detachable connection structure.

[0022] The beneficial effect is that the guard plate can also be disassembled separately at this time, and after a certain amount of rebound material accumulates, it can be cleaned separately and reused.

[0023] As a further improvement, the guard plate is equipped with a movable maintenance panel that can be opened to form a maintenance passage.

[0024] The beneficial effect is that the inspection panel can be opened at this time, which makes it easier for staff to inspect and repair cable chains or electrical and hydraulic pipeline faults inside the cable chains, thus improving the efficiency of inspection and repair.

[0025] To achieve the above objectives, the technical solution of the mixed-injection system provided by the present invention is as follows: A mixed spraying system includes a shotcrete bridge with a mixed spraying device installed on it. The mixed spraying device includes a base frame and a circumferential rotating mechanism. The circumferential rotating mechanism includes a wheel frame for mounting wheels. The base frame has an arc-shaped track for the circumferential rotating mechanism to move. A baffle plate is provided on the outer side of the wheel frame. The curvature of the baffle plate is not less than the curvature of the arc-shaped track. The baffle plate can cover part or all of the wheel frame, and the vertical projection of the baffle plate satisfies the requirement of covering the vertical projection of the arc-shaped track.

[0026] The beneficial effects are as follows: This invention improves upon existing TBM-based spraying devices. During concrete spraying operations, because the baffle plate is located on the outside of the traveling wheel frame, the circumferential rotating mechanism can move smoothly without interference from the baffle plate, and the baffle plate completely covers the entire vertical area of ​​the curved track. Therefore, when the rebounding material falls onto the curved track, it is completely blocked by the baffle plate, thus preventing the circumferential rotating mechanism from jamming or being damaged by the rebounding material falling onto the curved track.

[0027] As a further improvement, the side where the spray nozzle is located in the mixing and spraying device is defined as the front, and the arc track includes a C-shaped track with an opening on one side, and the opening of the C-shaped track faces rearward.

[0028] The beneficial effect is that, compared with directly exposed tracks, the C-shaped track arrangement can use the track itself to block rebound material, resulting in better reliability.

[0029] As a further improvement, the slag baffle is installed on the upper side plate of the C-shaped track with the opening facing backward. The traveling wheel frame is connected to an auxiliary baffle located above the slag baffle. The auxiliary baffle is provided with a shotcrete head mounting position for installing the shotcrete head. A space is formed between the auxiliary baffle and the traveling wheel frame for the slag baffle to extend into. The traveling wheel frame is covered by the slag baffle.

[0030] The beneficial effects are: the distance between the baffle plate and the first track can be sufficiently close, ensuring a good baffle effect. Simultaneously, the auxiliary baffle can provide real-time support and obstruction to the spraying area of ​​the shotcrete head, further enhancing the protection of the curved track. Furthermore, the auxiliary baffle and the baffle plate work together to form a maze structure, further improving the actual baffle effect in the spraying area of ​​the shotcrete head.

[0031] As a further improvement, the slag baffle has an L-shaped cross-section and includes a vertical plate extending in a vertical plane and an extension plate extending in the front-rear direction. The vertical plate is fixed to the upper side plate of the C-shaped track, and the extension plate extends into the space.

[0032] The beneficial effects are: this L-shaped baffle plate, combined with the C-shaped track installation method, has good compactness, and the vertical plate can also play a role in blocking the rebound of material.

[0033] As a further improvement, the extension plate is mounted on the upright plate via a detachable connection structure.

[0034] The beneficial effect is that after a certain amount of rebound material accumulates on the extension plate, the extension plate can be removed separately for cleaning, making it easier to reuse the extension plate multiple times.

[0035] As a further improvement, the slag baffle is installed on the foundation frame or a corresponding connecting base set on the foundation frame via a detachable connection structure.

[0036] The beneficial effect is that after a certain amount of rebound material accumulates on the slag baffle, the slag baffle can be removed separately for cleaning, making it easy to reuse the slag baffle multiple times.

[0037] As a further improvement, a cable chain bracket is also installed on the basic frame. The cable chain bracket includes an arc-shaped guard plate covering the outside of the drive unit of the circumferential rotating mechanism. The arc of the guard plate is not less than the arc of the arc track.

[0038] The beneficial effects are: at this time, the guard plate can protect the cable chain and drive device where the electrical and hydraulic pipelines are installed, preventing rebound material from accumulating on the cable chain or drive device, thus further improving protection. At the same time, the guard plate can also work with the slag baffle to prevent rebound material from rebounding from the rear and entering the arc track, enhancing the slag-blocking effect on the arc track.

[0039] As a further improvement, the guard plate is mounted on the cable chain bracket via a detachable connection structure.

[0040] The beneficial effect is that the guard plate can also be disassembled separately at this time, and after a certain amount of rebound material accumulates, it can be cleaned separately and reused.

[0041] As a further improvement, the guard plate is equipped with a movable maintenance panel that can be opened to form a maintenance passage.

[0042] The beneficial effect is that the inspection panel can be opened at this time, which makes it easier for staff to inspect and repair cable chains or electrical and hydraulic pipeline faults inside the cable chains, thus improving the efficiency of inspection and repair.

[0043] As a further improvement, the mixing and spraying device is equipped with a guide structure for clamping the left and right sides of the shotcrete bridge, and the shotcrete bridge is equipped with a guide surface for frictional engagement with the guide structure, and a slag-proof plate is installed above the guide surface.

[0044] The beneficial effect is that the anti-slag plate can prevent the rebounding material from falling onto the guide surface, thus ensuring a more stable guiding effect. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the structure of the shotcrete system in Embodiment 1 of the present invention; Figure 2 for Figure 1 Schematic diagram of the intermediate mixing spray device; Figure 3 for Figure 2 Side view of the intermediate mixing spraying device; Figure 4 for Figure 1 A schematic diagram of the basic framework; Figure 5 for Figure 4 Side view of the basic framework; Figure 6 for Figure 4 A magnified view of a section at point I; Figure 7 for Figure 5 Enlarged view of section II in the middle; Figure 8 for Figure 2 Schematic diagram of the circumferential rotation mechanism; Figure 9 for Figure 3 A partial sectional view; Figure 10 for Figure 9 A magnified view of a section at point I; Figure 11 for Figure 9 A magnified view of the connection point of the central baffle plate; Figure 12 for Figure 11 Schematic diagram of the structure of the central slag baffle plate; Figure 13 for Figure 12 A sectional view; Figure 14 for Figure 3 Schematic diagram of the middle support arm; Figure 15 for Figure 1 Side view of the shotcrete bridge; Figure 16 for Figure 15 A magnified view of a section at point I; Figure 17 for Figure 2 Schematic diagram of the structure of the drag chain support; Figure 18 for Figure 17 Top view; Figure 19 for Figure 17 A magnified view of a section at point AA; Figure 20 This is a schematic diagram of the working process of the material rebounding in one embodiment of the mixing and spraying device of the present invention; Figure 21 This is a schematic diagram of the working process of the material rebounding in another embodiment of the mixing and spraying device of the present invention.

[0046] Explanation of reference numerals in the attached figures: 1. Mixing and spraying device; 2. Shotcrete bridge; 3. Moving platform; 4. Dust cover; 5. First auxiliary platform; 6. Second auxiliary platform; 101. Basic frame; 102. Circumferential rotation mechanism; 103. Slag baffle; 104. Cable drag chain bracket; 105. Working platform; 106. Support arm; 1011. First frame; 1012. Second frame; 1013. Third frame; 1014. Arc-shaped track; 1015. Connecting plate; 1016. Limiting block; 1017. Arc-shaped rack ; 1021, Auxiliary baffle; 1022, Shotcrete head; 1023, Traveling wheel; 1024, Drive unit; 1031, Vertical plate; 1032, Extension plate; 1041, Inspection plate; 1042, Guard plate; 1043, Vertical plate; 1044, Connecting beam; 1045, Support plate; 1061, Support wheel; 1062, Guide wheel; 201, Spur rack; 202, Support rail; 203, Mounting plate; 204, Guide surface; 205, Slag-proof plate; 700, Tunnel wall. Detailed Implementation

[0047] The present invention will be further described in detail below with reference to the embodiments.

[0048] To prevent the rebounding concrete slurry (hereinafter referred to as rebound material) from falling onto the arc-shaped track of the spraying device, the basic technical concept of this invention is to install a baffle plate on the outside of the traveling wheel frame of the circumferential rotating mechanism. This ensures the smooth rotation of the circumferential rotating mechanism and allows for the installation of the spraying head. The length of the baffle plate is set to completely cover the traveling track. The side where the spraying head is installed is defined as the front. The baffle plate can then be arranged extending from front to back or from back to front. Simultaneously, the curvature of the baffle plate should not be less than the curvature of the arc-shaped track, ensuring that the entire area directly above the arc-shaped track is shielded by the baffle plate, thereby preventing the rebound material from falling onto the baffle plate.

[0049] The present invention will be further described in detail below with reference to the accompanying drawings.

[0050] Specific embodiment 1 of the mixed injection system provided by the present invention: The mixed spraying system provided in this embodiment can be referenced. Figure 1 It mainly includes a shotcrete bridge 2, which can be connected to the trailer or connecting bridge of the TBM to realize the overall integration of the shotcrete system with the TBM. The shotcrete bridge 2 is equipped with a shotcrete device 1 and several platforms for workers to move and work, such as the first auxiliary platform 5 and the second auxiliary platform 6 arranged in front and behind.

[0051] In addition, in this embodiment, the shotcrete bridge 2 is equipped with a movable structure that allows the mixing spraying device 1 to move back and forth. This allows a single mixing spraying device 1 to move forward and backward to cover a larger area. Correspondingly, a movable platform 3 that can move back and forth is also provided on the shotcrete bridge 2, achieving large-area coverage by a single platform. Of course, in other embodiments, the mixing spraying device 1 can be fixed to the shotcrete bridge. To ensure sufficient shotcrete coverage area, the number of shotcrete devices can be appropriately increased.

[0052] The shotcrete bridge 2 is also equipped with a dust cover 4. The interior of the dust cover 4 can accommodate a slag conveyor belt or a pedestrian walkway, providing stable protection for slag removal or worker movement. Alternatively, in other embodiments, the dust cover can be omitted, and the shotcrete bridge can be a large box girder, utilizing its internal space for slag removal or pedestrian access. Furthermore, to facilitate worker operations, the shotcrete mixing device can optionally be equipped with a working platform 105. The specific structure of the working platform 105 is existing technology and will not be described further.

[0053] In this embodiment, the mixing spray device 1 is as follows: Figure 2 and Figure 3 As shown, it mainly includes a base frame 101, a circumferential rotating mechanism 102, and a baffle plate 103. The circumferential rotating mechanism 102 includes a drive device and a mounting frame for mounting the shotcrete head. The drive device and the mounting frame can be mounted on the traveling wheel frame of the circumferential rotating mechanism 102. An arc-shaped track is provided on the base frame 101. Under the driving action of the drive device, the traveling wheels 1023 on the traveling wheel frame can move along the arc-shaped track of the base frame 101, thereby driving the shotcrete head to move circumferentially and achieving a large-area shotcrete coverage.

[0054] A baffle plate 103 is provided on the outer side of the traveling wheel frame. The baffle plate 103 can prevent rebounding material from falling onto the arc-shaped track. Correspondingly, the baffle plate 103 should also be set as an arc-shaped structure. To ensure full coverage, the curvature of the baffle plate 103 is not less than the arc length of the arc-shaped track. Specifically, regarding how the baffle plate 103 is set, this embodiment provides an implementation method in which it is installed on the outer side of the traveling wheel frame and can cover part of the traveling wheel frame. Figures 9-13 As shown, the baffle plate 103 can be installed on the front side of the traveling wheel frame. It has a rearward extension that needs to cover the vertical area of ​​the entire arc track, and its vertical projection can cover the vertical projection of the arc track. At this time, under the protection of the baffle plate 103, the rebound material from the tunnel wall will fall on the baffle plate 103 and will not fall directly on the arc track.

[0055] In this embodiment, the arc-shaped track is configured with a C-shaped track that opens backward. Specifically, as shown... Figures 4-11As shown, the arc-shaped track 1014 includes two tracks, specifically a first track and a second track arranged at intervals. Both the first and second tracks are C-shaped tracks with an opening on one side. The opening of the first track, which is further forward, faces backward, while the opening of the second track, which is further back, faces forward. The circumferential rotating mechanism 102 moves along the opening of the arc-shaped track, and the traveling wheels 1023 roll along the arc-shaped track. Since the opening of the first track faces backward, the arc-shaped track itself has a slag-blocking effect, further isolating rebounding material. Alternatively, in other embodiments, only the first track can be retained, i.e., only one row of traveling wheels can be arranged. In this case, the stable movement of the circumferential rotating mechanism can still be achieved with the help of the pinion gear and arc-shaped rack in the drive system. Of course, the second track can also be in other forms, such as an I-beam shape. When the first track with its rearward opening is configured, the arc-shaped track can achieve its own slag-blocking effect.

[0056] In other implementations, if the slag-blocking effect of the track itself is not considered, the track can be arranged entirely in an I-shape, or even an arc-shaped track can be formed directly using the outer perimeter of the base frame. In this case, the slag-blocking plate can be fixed to the base frame, and the slag-blocking effect can be achieved by the slag-blocking plate covering the arc-shaped track.

[0057] At the same time, such as Figures 8-10 As shown, an auxiliary baffle 1021 is also connected to the traveling wheel frame of the circumferential rotating mechanism. The auxiliary baffle 1021 has a shotcrete head mounting position for mounting the shotcrete head 1022. In this case, the auxiliary baffle 1021 can provide real-time protection for the area below the shotcrete head's spraying position. Furthermore, the auxiliary baffle 1021 is positioned above the slag-blocking plate 103 and, together with the slag-blocking plate, forms a labyrinth structure, enabling coordinated multi-level blocking of rebounding material and improving the rebound effect. Specifically, the auxiliary baffle 1021 can be an arc-shaped structure or a rectangular flat plate structure. An arc-shaped structure is preferred.

[0058] Specifically, in this embodiment, the slag baffle 103 has an L-shaped cross-section, including a vertical plate 1031 and an extension plate 1032. When installing the slag baffle 103, it can be directly fixed to the C-shaped track via the vertical plate 1031. At this time, the extension plate 1032 extends rearward into the space between the auxiliary baffle 1021 and the traveling wheel frame, covering part of the traveling wheel frame. The extension plate 1032 then primarily protects the curved track. Furthermore, the vertical plate 1031 and the extension plate 1032 form a rearward opening, further blocking rebounding material. Of course, with the C-shaped track configured, the slag baffle can also be installed separately on the base frame. In this case, depending on the installation requirements, the slag baffle does not need to be L-shaped; it can consist only of the extension plate 1032 and be installed on the base frame using other structures. However, when installed on the upper side plate of the C-shaped track, overall compactness is ensured, making it suitable for small TBMs. Of course, without the vertical plate 1031, the slag baffle 103 can also be directly installed on the upper side plate of the C-shaped track using other methods. For example, when the traveling wheel frame is low, the slag baffle can also be directly welded to the C-shaped track.

[0059] To facilitate the individual cleaning and reuse of the extension plate 1032, such as Figure 11 The extension plate 1032 shown is mounted on the upright plate via a detachable connection structure, which can be a commonly used detachable connection method in the prior art, such as bolts or clips. In other embodiments, for short-distance tunnel excavation, the extension plate 1032 can be directly welded to the upright plate 1031. In this case, even if there is an accumulation of rebound material, it will not affect normal shotcreting. Moreover, a real-time water spraying cleaning device can be installed to clean the rebound material accumulated on the extension plate 1032 in real time.

[0060] Regarding the installation method of the slag baffle 103, regardless of whether it has a vertical plate 1031, if it needs to be disassembled and cleaned separately, it can be installed using a detachable connection structure. It can be directly installed on the foundation frame or installed on the corresponding connection base set on the foundation frame.

[0061] Additionally, it should be noted that the arrangement of the transmission rack between the drive unit 1024 and the arc-shaped track 1014, specifically the arrangement of the arc-shaped rack 1017, can be as follows: Figure 11 As shown, the arrangement is on the outside of the arc-shaped track. In this case, the baffle plate 103 needs to be extended appropriately to cover the arc-shaped rack 1017. Alternatively, the arc-shaped rack 1017 can be arranged between two arc-shaped tracks, with an arc-shaped through slot provided on the rear arc-shaped track for the coupling to pass through. In this case, the baffle plate 103 covers the area of ​​the arc-shaped track 1014 while also providing protection for the arc-shaped rack.

[0062] Regarding the structure of the basic frame, this embodiment provides a multi-piece assembled basic frame 101. This block-like structure can be assembled as needed, specifically as follows: Figure 5 As shown, the basic frame 101 can be assembled from three smaller frames: a first frame 1011, a second frame 1012, and a third frame 1013. Of course, the basic frame is not limited to this assembled structure; a one-piece structure is also a feasible solution, provided that the cost is acceptable.

[0063] When installing curved tracks, one can utilize, for example... Figure 6 The connecting plate 1015 shown can also be used to directly mount the arc-shaped track 1014 onto the base frame, which is a flexible option that can be chosen by those skilled in the art. Furthermore, to prevent the circumferential rotating mechanism 102 from over-rotating, this embodiment also provides a limit block 1016 on the base frame. Of course, by adjusting the controller of the drive device, for example, when the drive device is a drive motor, the rotation angle of the drive device can be actively controlled to achieve the limitation of the drive device.

[0064] Specific embodiment 2 of the mixed injection system provided by the present invention: In this embodiment, the spraying device 1 is also equipped with a cable chain support 104. The electrical and hydraulic pipelines required for the spraying and driving device can be integrated into the cable chain, which can be placed in the cable chain support 104. Figure 10 and Figures 17-19 As shown, the drag chain bracket 104 is installed on the rear side of the drive device 1024, and mainly includes a protective plate 1042 covering the upper side of the drive device 1024. The protective plate 1042 is also arc-shaped, and the curvature of the protective plate 1042 is not less than the curvature of the arc track 1014.

[0065] At this point, the guard plate 1042 primarily serves to protect the drive unit 1024 and the drag chain in the drag chain support 104. It also works in conjunction with the baffle plate 103 on the arc-shaped track 1014 to collaboratively block rebounding material. For example... Figure 20 As shown, at this time, the rebound material from any direction of the tunnel wall 700 can be effectively blocked.

[0066] Regarding the specific installation method of the guard plate 1042, it can be welded to other parts of the cable chain bracket 104, or it can be detached using bolts or other detachable connection methods. In this case, the guard plate 1042 can be removed for cleaning and replacement, or it can be removed to repair the cable chain or electro-hydraulic pipeline.

[0067] Furthermore, considering the convenience of maintaining electro-hydraulic pipelines, this embodiment also includes a movable inspection plate 1041. The inspection plate 1041 has various modes of movement; it can be connected using a detachable connection structure, allowing it to be removed during maintenance. Alternatively, it can be used in a manner similar to... Figure 19 The hinged structure shown allows for a flip-up inspection panel, and can also be configured as a sliding structure to form a sliding door. All three methods of operation allow the inspection passage to be opened, facilitating maintenance work.

[0068] Of course, in other embodiments, even without the maintenance plate 1041, the entire cable chain can be removed from the cable chain bracket for maintenance when maintenance is required.

[0069] During installation, the cable chain bracket can be connected to the base frame 101 using the connecting beam 1044. To better prevent and limit the rotation of the cable chain, the cable chain bracket is also equipped with an upright plate 1043 and a support plate 1045.

[0070] Specific embodiment 3 of the mixed spray system provided by the present invention: The difference between this embodiment and Embodiment 1 is that the baffle plate in the mixing and spraying device can completely cover the traveling wheel frame. For example... Figure 21 As shown, the baffle plate can be positioned behind the drive unit, extending forward to cover the travel track and wheel frame, preventing rebounding material. Positioning the baffle plate behind the drive unit also eliminates the need for a cable chain support, as the baffle plate can cover and protect both the drive unit and the cable chain. However, the baffle plate doesn't necessarily need to be positioned behind the drive unit; it can be moved forward, with an arc-shaped groove to accommodate the drive unit's movement. In this case, a cable chain support with a protective plate can still be used. The baffle plate can also be installed on the base frame or a corresponding connection base on the base frame via a detachable connection structure, allowing for individual disassembly and cleaning.

[0071] Specific embodiment 4 of the mixed injection system provided by the present invention: like Figure 3 , Figures 14-16 As shown, in this embodiment, a support arm 106 for traveling along the shotcrete bridge is provided on the basic frame 101. The support arm 106 is provided with a support wheel 1061, which can travel along the support track 202 of the shotcrete bridge to drive the entire shotcrete mixing device to move back and forth. The specific driving method can also utilize the principle of gear and rack, with a straight rack 201 installed on the shotcrete bridge via the mounting plate 203.

[0072] In addition, the support arm in this embodiment is further equipped with a guide structure, which can clamp the left and right sides of the shotcrete bridge to better constrain the travel trajectory of the support device. A guide surface 204 is provided on the shotcrete bridge to frictionally engage with the guide structure. Specifically, the guide structure can be a guide wheel 1062, in which case the guide wheel 1062 and the shotcrete bridge experience rolling friction; or it can be a slider, in which case the slider and the shotcrete bridge experience sliding friction. To prevent rebounding material from falling onto the guide surface, a slag-preventing plate 205 is also provided on the guide surface. The slag-preventing plate 205 can protect the guide surface and prevent rebounding material from jamming the guide structure.

[0073] Of course, in other embodiments, the guide structure may not be provided, and the support wheel will generally not derail if it is not subjected to a large lateral force.

[0074] Specific embodiments of the mixing spray device in this invention: The embodiments of the mixed spraying device are those described in any of the embodiments 1 to 3 of the mixed spraying system described above, and will not be specifically described here.

[0075] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mixing spraying device, comprising a base frame and a circumferential rotating mechanism, the circumferential rotating mechanism including a wheel frame for mounting wheels, and an arc-shaped track on the base frame for the circumferential rotating mechanism to move, characterized in that, An arc-shaped baffle plate is installed on the outer side of the traveling wheel frame. The curvature of the baffle plate is not less than that of the arc-shaped track. The baffle plate can cover part of the traveling wheel frame, and its vertical projection satisfies the requirement of covering the vertical projection of the arc-shaped track. The arc-shaped track includes two C-shaped tracks spaced back-to-back, with their openings facing each other. The traveling wheels on the traveling wheel frame are located within the two C-shaped tracks and roll in cooperation with them. The baffle plate has an L-shaped cross-section, including a vertical plate extending in the vertical plane and an extension plate extending in the back-to-back direction. Fixed to the upper side plate of the front C-shaped track; the traveling wheel frame is connected to an auxiliary baffle located above the slag baffle. The front end of the auxiliary baffle is provided with a slurry head mounting position for installing the slurry head. A space for the extension plate to extend into is formed between the auxiliary baffle and the traveling wheel frame. The auxiliary baffle and the slag baffle cooperate to form a labyrinth structure; an arc-shaped rack is arranged on the side of the rear C-shaped track opposite to the front C-shaped track. The length of the extension plate is sufficient to cover the arc-shaped rack; a drive device is installed at the rear of the traveling wheel frame. The gear in the drive device cooperates with the arc-shaped rack.

2. The mixing spraying device according to claim 1, characterized in that, The ends of the basic frame are equipped with limit blocks to prevent the circumferential rotating mechanism from over-rotating.

3. The mixing spraying device according to claim 1, characterized in that, The basic framework is assembled from the first frame, the second frame, and the third frame.

4. The mixing spraying device according to claim 1, characterized in that, The mixing spraying device is equipped with a working platform.

5. The mixing spraying device according to any one of claims 1-4, characterized in that, The extension plate is mounted on the upright plate via a detachable connection structure.

6. The mixing spraying device according to any one of claims 1-4, characterized in that, The slag baffle is installed on the front C-shaped track via a detachable connection structure.

7. The mixing spraying device according to any one of claims 1-4, characterized in that, The basic frame is also equipped with a cable chain bracket, which includes an arc-shaped guard plate covering the outside of the drive unit of the circumferential rotating mechanism. The arc of the guard plate is not less than the arc of the arc track.

8. The mixing spraying device according to claim 7, characterized in that, The guard plate is mounted on the cable chain bracket via a detachable connection structure.

9. The mixing spraying device according to claim 7, characterized in that, The protective plate is equipped with a movable maintenance panel that can be opened to form a maintenance passage.

10. A mixed spraying system, comprising a spray bridge, wherein a mixed spraying device is installed on the spray bridge, characterized in that, The mixing and spraying device includes a basic frame and a circumferential rotating mechanism. The circumferential rotating mechanism includes a wheel frame for mounting wheels. The basic frame has an arc-shaped track for the circumferential rotating mechanism to move. An arc-shaped baffle plate is installed on the outer side of the wheel frame. The curvature of the baffle plate is not less than the curvature of the arc-shaped track. The baffle plate can cover a portion of the wheel frame, and its vertical projection satisfies the requirement of covering the vertical projection of the arc-shaped track. The arc-shaped track includes two C-shaped tracks spaced apart, with their openings facing each other. The wheels on the wheel frame are located within the two C-shaped tracks and roll in cooperation with them. The cross-section of the baffle plate... It is L-shaped and includes a vertical plate extending in the vertical plane and an extension plate extending in the front-rear direction. The vertical plate is fixed to the upper plate of the front C-shaped track. The traveling wheel frame is connected to an auxiliary baffle located above the slag baffle. The front end of the auxiliary baffle is provided with a slurry head mounting position for installing a slurry head. A space is formed between the auxiliary baffle and the traveling wheel frame for the extension plate to extend into. The auxiliary baffle and the slag baffle cooperate to form a labyrinth structure. An arc-shaped rack is arranged on the side of the rear C-shaped track opposite to the front C-shaped track. The length of the extension plate is sufficient to cover the arc-shaped rack. A drive device is installed at the rear of the traveling wheel frame. The gear in the drive device cooperates with the arc-shaped rack.

11. The mixed-spray system according to claim 10, characterized in that, The ends of the basic frame are equipped with limit blocks to prevent the circumferential rotating mechanism from over-rotating.

12. The mixed-spray system according to claim 10, characterized in that, The basic framework is assembled from the first frame, the second frame, and the third frame.

13. The mixed-spray system according to claim 10, characterized in that, The mixing spraying device is equipped with a working platform.

14. The mixed-spray system according to any one of claims 10-13, characterized in that, The extension plate is mounted on the upright plate via a detachable connection structure.

15. The mixed-spray system according to any one of claims 10-13, characterized in that, The slag baffle is installed on the front C-shaped track via a detachable connection structure.

16. The mixed-spray system according to any one of claims 10-13, characterized in that, The basic frame is also equipped with a cable chain bracket, which includes an arc-shaped guard plate covering the outside of the drive unit of the circumferential rotating mechanism. The arc of the guard plate is not less than the arc of the arc track.

17. The mixed-spray system according to claim 16, characterized in that, The guard plate is mounted on the cable chain bracket via a detachable connection structure.

18. The mixed-spray system according to claim 16, characterized in that, The protective plate is equipped with a movable maintenance panel that can be opened to form a maintenance passage.

19. The mixed-spray system according to claim 10, characterized in that, The mixing and spraying device is equipped with a guide structure for clamping the left and right sides of the shotcrete bridge. The shotcrete bridge is equipped with a guide surface for frictional engagement with the guide structure, and a slag-proof plate is installed above the guide surface.

Images