A new grouting device

Abstract

The application relates to a novel grouting device, which comprises a moving assembly, at least two supporting arms, an arc-shaped plate, a grouting assembly, a driving mechanism and a controller. The moving assembly comprises a track and a moving table moving along the track. The supporting arms are installed on the moving table. Each of the supporting arms comprises a mounting seat, a support and a first telescopic rod and a second telescopic rod. The arc-shaped plate is connected to the distal end of the supporting arms and is used to form a closed cavity with the inner wall of a tunnel. The grouting assembly is installed on the arc-shaped plate. The discharging end of the grouting assembly is communicated to the closed cavity and is used to inject slurry into the closed cavity. The driving mechanism is used to drive the support to rotate relative to the mounting seat so as to adjust the orientation of the arc-shaped plate. The controller is configured to automatically control the grouting amount of the grouting assembly according to the slurry pressure in the closed cavity.

Description

Technical Field

[0001] This application relates to the field of shield tunnel grouting technology, and more specifically, to a novel grouting device. Background Technology

[0002] Grouting technology is a key technology in tunnels and underground engineering used for purposes such as water plugging, reinforcing surrounding rock, filling voids, and preventing surface subsidence. During tunnel construction, reinforcement measures must be taken in special and adverse geological sections such as fault fracture zones, shallow buried sections, and weak structural sections to reduce the risk of tunnel collapse.

[0003] Existing equipment and technologies mainly include full-section curtain grouting, semi-enclosed peripheral grouting, targeted local grouting, pipe roof + grouting, and advanced small-diameter pipe grouting. Full-section curtain grouting involves drilling dense, deep radial or oblique boreholes at the working face, injecting grout to form a continuous reinforced curtain, and using geological drilling rigs or deep-hole drilling rigs in conjunction with grouting pump stations. Semi-enclosed peripheral grouting and targeted local grouting both use geological drilling rigs or deep-hole drilling rigs in conjunction with grouting pump stations. Pipe roof + grouting involves first constructing large-diameter, long-distance pipe roofs (steel pipes), and then injecting grout into the surrounding strata and the strata in front of the pipe roof through grouting holes on the pipe roof to form an advanced support arch. Advanced small-diameter pipe grouting involves driving small-diameter steel pipes (small-diameter pipes) at a certain angle outside the excavation outline, and injecting grout through the small-diameter pipes to form a short-distance advanced reinforced arch.

[0004] Existing grouting devices and construction techniques have drawbacks such as difficulty in controlling grouting pressure, low grouting efficiency, limited applicability to geological formations, and low level of equipment intelligence. Summary of the Invention

[0005] The purpose of this application is to provide a novel grouting device to solve the technical problems mentioned in the background art, such as difficulty in controlling grouting pressure, low grouting efficiency, limited applicability to geological formations, and low level of equipment intelligence.

[0006] To achieve the above objectives, this application provides a novel grouting device, comprising: A moving component, including a track and a moving platform that moves along the track; At least two support arms are mounted on the mobile platform, each support arm including a mounting base, a bracket rotatably connected to the mounting base, and a first telescopic rod and a second telescopic rod mounted on the bracket; An arc-shaped plate is connected to the distal end of the support arm, and the arc-shaped plate is used to form a sealed cavity between itself and the inner wall of the tunnel. The grouting assembly is installed on the arc-shaped plate, and the discharge end of the grouting assembly is connected to the sealed cavity for injecting grout into the sealed cavity. A drive mechanism is used to drive the bracket to rotate relative to the mounting base in order to adjust the orientation of the arc-shaped plate; And a controller configured to automatically control the grouting volume of the grouting assembly based on the grout pressure within the sealed cavity.

[0007] In an optional embodiment, the grouting assembly includes: The feed pipe has one feed inlet and several feed outlets; A nozzle structure, mounted on the arc-shaped plate, is used to spray slurry into the sealed cavity; An electric valve is provided on the slurry supply pipeline at the feed inlet, and the electric valve is electrically connected to the controller.

[0008] In an optional embodiment, the nozzle structure includes: The sleeve is fixedly installed on the arc-shaped plate; A limiting mounting ring is slidably mounted inside the arc-shaped plate; A spring is disposed between the sleeve and the limiting mounting ring; And a ball valve core, installed inside the limiting mounting ring, wherein the ball valve core is provided with a nozzle; The limiting mounting ring and the ball valve core together can compress the spring under the pressure of the slurry in the sealed cavity and trigger pressure detection.

[0009] In an optional embodiment, an annular pressure sensor is provided inside the sleeve, and one end of the spring abuts against the annular pressure sensor. The annular pressure sensor is used to detect the pressure value generated when the spring is compressed and transmit the pressure value to the controller.

[0010] In an optional implementation, the controller is configured to: When the pressure value detected by the annular pressure sensor is less than the preset target pressure, the electric valve is controlled to increase its opening. When the pressure value detected by the annular pressure sensor exceeds a preset safety threshold, the electric valve is controlled to close.

[0011] In an optional embodiment, a protruding post is provided inside the sleeve, and the end of the protruding post is provided with a spherical groove that mates with the feed end of the ball valve core.

[0012] In an optional embodiment, the arms are connected by a connecting rod, and the driving mechanism includes a third telescopic rod. One end of the third telescopic rod is mounted on the moving platform, and the other end is connected to the connecting rod. The extension and retraction of the third telescopic rod drives the bracket to rotate around the mounting base.

[0013] In an optional embodiment, a groove is provided in the middle of the bracket, and a sliding rod is connected to the telescopic end of the first telescopic rod. The sliding rod is limited and engaged on the outside of the groove, and the groove is used to limit the movement direction of the sliding rod.

[0014] In an optional embodiment, the outer edge of the arc-shaped plate is provided with a liner, and the liner, the outer surface of the arc-shaped plate, and the inner wall of the tunnel together constitute the sealed cavity.

[0015] In an optional embodiment, two sets of support arms are mounted on the mobile platform, and the two sets of support arms are connected by the connecting rod. The drive mechanism is connected to the connecting rod to realize the synchronous rotation of the two sets of support arms.

[0016] The novel grouting device of this application uses an installed annular pressure sensor to detect the pressure on the entire structure consisting of the ball and the ring in real time. When the detected pressure is less than the target pressure, the controller sends an increase signal to the electric ball valve to increase the opening size of the electric ball valve, thereby increasing the injection volume of concrete grout. When the detected pressure exceeds 1.5 times the safety threshold, the controller triggers a shutdown signal, which is sent to the electric ball valve to close the electric ball valve, completing the grouting work and realizing automated control.

[0017] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the installation of the novel grouting device of this application; Figure 2 This is a schematic diagram of the structure of the novel grouting device of this application; Figure 3 This is a partial schematic diagram of the moving parts in this application; Figure 4 This is a structural schematic diagram of the outrigger in one of the states of the present application; Figure 5 This is a structural schematic diagram of the outrigger in another state in this application; Figure 6 This is a schematic diagram of the arc-shaped plate in this application; Figure 7 This is a cross-sectional structural diagram of the arc-shaped plate in this application; Figure 8 for Figure 7 Enlarged view of point A; Figure 9 This is a schematic diagram of the inner structure of the arc-shaped plate in this application; Figure 10 This is a schematic diagram of the nozzle structure in this application; Figure 11 This is an exploded structural diagram of the nozzle structure in this application.

[0020] icon: 1-Tunnel structure; 2-Rail; 3-Moving platform; 4-Support arm; 401-Mounting base; 402-Bracket; 4021-Through hole; 4022-Slide groove; 403-First telescopic rod; 404-Sliding rod; 405-Double hinge seat; 406-Second telescopic rod; 407-Limiting block; 5-Connecting rod; 6-Third telescopic rod; 7-Arc plate; 701-Single hinge seat; 702-Protrusion; 703-Slot; 8-Grouting assembly; 801-Distribution pipe; 8011-Outlet; 8012-Inlet; 802-Sleeve; 8021-Protruding column; 803-Annular pressure sensor; 804-Spring; 805-Ball head valve core; 8051-Inclined groove; 8052-Protruding ring; 806-Limiting mounting ring. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] The novel grouting device of this application aims to solve the technical problems of existing technologies, such as difficulty in controlling grouting pressure, low grouting efficiency, limited applicability to geological formations, and low level of equipment intelligence. Through a movable modular design, a multi-degree-of-freedom robotic arm structure, and intelligent grouting control based on pressure feedback, it achieves precise, efficient, and adaptive grouting of different orientations and geological formations on the tunnel inner wall.

[0025] See Figures 1-11 The novel grouting device provided in this application includes a moving component, which specifically includes a horizontally distributed track 2 and a moving platform 3 that moves along the track 2.

[0026] The track 2 consists of two parallel tracks, fixedly installed on the bottom surface of the tunnel structure 1. The movable platform 3 can move back and forth along the track 2, thereby realizing segmented construction, that is, after grouting is completed in one construction segment, it can be quickly moved to the next construction segment for operation.

[0027] By incorporating movable components, the new grouting device can be flexibly moved within the tunnel to cover the entire section to be reinforced, avoiding the drawbacks of traditional fixed grouting equipment that requires frequent disassembly and relocation, thus significantly improving construction efficiency and operational continuity.

[0028] At least two support arms 4 are installed on the mobile platform 3. In this embodiment, two sets of support arms 4 are installed on the mobile platform 3, and each set of support arms 4 includes a mounting base 401, a bracket 402, a first telescopic rod 403 and a second telescopic rod 406.

[0029] The mounting base 401 is fixedly installed on the centerline of the upper surface of the mobile platform 3, and the bracket 402 is rotatably connected to the mounting base 401 through a pin, so that the bracket 402 can rotate relative to the mounting base 401 within a range of 0-90° around the pin, thereby realizing grouting treatment of the tunnel inner wall in different directions.

[0030] The two support arms 4 are connected by a connecting rod 5 to achieve synchronous movement of the two supports 402. The distal end of the support arm 4 is connected to an arc plate 7, the shape of which follows the shape of the tunnel. Furthermore, the arc plate 7 is used to form a sealed cavity with the inner wall of the tunnel.

[0031] The outer edge of the arc plate 7 is provided with a liner, and the liner, the outer surface of the arc plate 7 and the inner wall of the tunnel together constitute the aforementioned sealed cavity.

[0032] The sealed cavity serves as the direct space for grout filling, ensuring that the injected grout can fully penetrate into the formation fractures under pressure, thus preventing disorderly loss.

[0033] Furthermore, a groove 4022 is provided in the middle of the bracket 402, and a sliding rod 404 is connected to the telescopic end of the first telescopic rod 403. The sliding rod 404 is limited and engaged on the outside of the groove 4022. The groove 4022 is used to limit the movement direction of the sliding rod 404, ensuring that the sliding rod 404 moves along a predetermined straight trajectory when the first telescopic rod 403 is driven. The second telescopic rod 406 is rotatably mounted on both sides of the bracket 402, and its tilt angle can be changed with telescopic extension.

[0034] The combination of the guide groove 4022 and the multi-angle telescopic rod enables precise and controllable extension and retraction of the arc plate 7, avoiding swaying or jamming during the movement and improving the reliability and positioning accuracy of the mechanical structure.

[0035] The bracket 402 has a through hole 4021, and the connecting rod 5 is installed between the corresponding through holes 4021 on two different brackets 402 to realize the synchronous movement of the two brackets 402 connected by the connecting rod 5.

[0036] With the corresponding cooperation of the bracket 402 and the connecting rod 5, the working position of the arc plate 7 can be flexibly adjusted according to the shape of the tunnel cross section and the grouting requirements, so that the grouting operation can cover different areas such as the arch, side wall and even the bottom, which greatly expands the applicability of the device.

[0037] From the angle of cooperation between the arc plate 7 and the support arm 4, the telescopic ends of the second telescopic rod 406 and the first telescopic rod 403 on each support arm 4 are connected and cooperated with the arc plate 7.

[0038] Specifically, a single hinge seat 701 is provided on the inner side of the arc plate 7, and a double hinge seat 405 is provided at the telescopic end of the first telescopic rod 403, which can be connected to the arc plate 7.

[0039] The single hinge seat 701 is connected to the double hinge seat 405 at the end of the first telescopic rod 403 and the end of the second telescopic rod 406, respectively. Through the coordinated extension and retraction of the first telescopic rod 403 and the second telescopic rod 406, the arc-shaped plate 7 can be driven to extend outward or retract inward.

[0040] The grouting cavity formed by the arc plate 7 and the inner wall of the tunnel can transform the grouting process from the traditional open spraying to closed pressure filling. The diffusion range of the grout in the stratum is more controllable, and the filling density is significantly improved. It is especially suitable for complex geological conditions such as fractured zones and soft strata.

[0041] During operation, the first telescopic rod 403 and the second telescopic rod 406 extend to allow the connected arc plate 7 to extend outwards. Conversely, the first telescopic rod 403 and the second telescopic rod 406 retract to allow the connected arc plate 7 to retract inwards. This facilitates the separation of the arc plate 7 from the formed concrete layer on the tunnel wall. Furthermore, when rotating to the other side after retraction, it is not restricted by the tunnel wall, thus facilitating overall movement.

[0042] From the perspective of driving the aforementioned bracket 402, the novel grouting device in this application also includes a driving mechanism for driving the bracket 402 to rotate relative to the mounting base 401 in order to adjust the orientation of the arc plate 7.

[0043] Specifically, based on the connection between the two support arms 4 via the connecting rod 5, the drive mechanism includes two sets of third telescopic rods 6 mounted on the moving platform 3, with the third telescopic rods 6 located on both sides of the connecting rod 5 respectively.

[0044] Furthermore, the root of the third telescopic rod 6 is fixedly installed on the moving platform 3, and the telescopic end is installed on the connecting rod 5.

[0045] When the third telescopic rod 6 on one side retracts and the third telescopic rod 6 on the other side extends, the two brackets 402 connected to the connecting rod 5 will rotate synchronously towards the third telescopic rod 6 on the retracted side, thereby realizing the overall adjustment of the working position of the arc plate 7.

[0046] When one side of the support 402 rotates to its lowest position, it is supported by a limiting block 407 installed on the side of the support 402. The limiting block 407 is used to limit the lowest point of the movement of the support 402. By replacing the limiting block 407 with one of different lengths, the height of the lowest point of the support 402 can be changed, thereby adapting to tunnels with different cross-sectional dimensions.

[0047] The differential control of the third telescopic rods 6 on both sides enables the synchronous and smooth rotation of the two support arms 4 and the arc plate 7, resulting in a simple structure and a large driving force. The limit block 407 provides a mechanical safety limit, preventing excessive rotation of the bracket 402 from causing equipment damage or safety accidents.

[0048] The various telescopic rods in this application are all driven by pneumatic or hydraulic cylinders, which can provide reliable and precise telescopic movements, thereby creating the basic conditions for adjusting the position of the arc plate 7.

[0049] A grouting assembly 8 is installed on the arc-shaped plate 7 for injecting grout into the aforementioned sealed cavity. Multiple sets of grouting assemblies 8 are provided and distributed along the vertical direction of the arc-shaped plate 7.

[0050] During grouting operations, the grouting component 8 located on the lower side prioritizes grouting, which helps to expel air and water from the cavity and ensures that the grout fills the cavity evenly from bottom to top.

[0051] Each grouting assembly 8 includes a distribution pipe 801 and several nozzle structures. The distribution pipe 801 is provided with an inlet 8012 and several outlets 8011. The external grout supply pipeline is connected to the inlet 8012 through an electric valve, and a nozzle structure is installed on each outlet 8011.

[0052] The inner side of the arc plate 7 is provided with a protrusion 702, and a number of slots 703 are provided on the protrusion 702. The nozzle structure is installed in the slots 703 and is connected in a detachable manner.

[0053] The slurry is evenly distributed to multiple nozzle structures via the distribution pipe 801. Combined with the bottom-up grouting sequence, this ensures the uniformity and compactness of the slurry filling within the sealed cavity. Furthermore, the detachable nozzle structure facilitates future maintenance and replacement.

[0054] External concrete slurry enters the interior of the distribution pipe 801 through the inlet 8012 and is discharged through multiple outlets 8011, thereby distributing the concrete slurry to multiple nozzle structures. Meanwhile, the concrete slurry supply pipeline is connected to the inlet 8012 via an electric valve. The electric valve is electrically connected to the controller, and the pipeline opening and closing is controlled by the electric valve. In the open state, the concrete slurry is sprayed into the cavity through the nozzle structure.

[0055] Each nozzle structure includes a sleeve 802, a limiting mounting ring 806, a spring 804, and a ball valve core 805. The ball valve core 805 is provided with a nozzle for external spraying. The sleeve 802 is fixedly installed at the inner port of the slot 703, and the limiting mounting ring 806 is limited and slidably installed at the outer port of the slot 703.

[0056] Spring 804 is installed between sleeve 802 and limit mounting ring 806, ball valve core 805 is installed inside limit mounting ring 806, and the nozzle of ball valve core 805 extends out of the end of limit mounting ring 806.

[0057] A raised ring 8052 is provided on the outer side of the ball valve core 805. The raised ring 8052 is matched with the inner wall of the limiting mounting ring 806 to prevent the ball valve core 805 from falling off.

[0058] The ball valve core 805 has an inclined groove 8051 on one side of the nozzle, which can increase the spray cross section of the nozzle, so that the slurry can be sprayed evenly to the periphery, which is conducive to the rapid diffusion of the slurry in the closed cavity.

[0059] A stepped hole is provided inside the sleeve 802, and an annular pressure sensor 803 is provided on the stepped surface of the stepped hole. The root side end of the spring 804 abuts against the detection surface of the annular pressure sensor 803.

[0060] The limiting installation ring 806 is in a limiting fit with the slot 703. At the same time, the limiting installation ring 806 can slide along the axial direction of the slot 703. When the pressure of the concrete slurry inside the sealed cavity increases, it pushes the ball valve core 805 and the limiting installation ring 806 to compress the spring 804. The pressure value is detected by the installed annular pressure sensor 803. After the pressure value reaches the predetermined value, the electric ball valve closes, thereby stopping the grouting work.

[0061] Specifically, when the slurry is injected into the sealed cavity through the nozzle, the pressure inside the sealed cavity gradually increases. The increased pressure pushes the ball valve core 805 and the limiting mounting ring 806 inward, i.e., towards the sleeve 802, thereby compressing the spring 804. The pressure generated when the spring 804 is compressed is detected in real time by the annular pressure sensor 803, and the detected value is transmitted to the controller.

[0062] The pressure sensor built into the nozzle can directly acquire the actual grout pressure within the sealed cavity without requiring additional holes in the cavity for sensor installation. This simplifies the sealing structure and avoids control lag issues caused by differences in the location of the pressure measurement point and the grouting point, achieving real-time and accurate pressure detection.

[0063] Based on the above detection of grouting pressure, the controller in this application is configured to automatically control the grouting volume of the grouting component 8 according to the grout pressure in the sealed cavity.

[0064] The controller (such as a programmable logic controller, PLC) has a pre-set target pressure value (which can be set in the range of 1MPa to 20MPa depending on the engineering requirements) and a safety threshold (such as 1.5 times the target pressure).

[0065] When the pressure value detected by the annular pressure sensor 803 is less than the preset target pressure, it is determined that the grout filling in the cavity is insufficient. At this time, the controller outputs an increased signal to the electric valve, increasing the opening degree of the electric valve, thereby increasing the injection flow rate of the grout and causing the cavity pressure to rise rapidly to the target value. When the detected pressure value exceeds the preset safety threshold, it is determined that grouting has been completed or abnormal overpressure has occurred. The controller triggers a shutdown signal, controlling the electric valve to completely close and terminating the grouting operation. To reduce blockage during the material conveying process, the electric valve is preferably in the form of an electric ball valve, which can reduce the risk of pipeline blockage while ensuring stable material conveying.

[0066] Through the aforementioned closed-loop pressure control, the grouting process can be fully automated. Compared to the traditional method of manually judging the grouting endpoint based on experience, this application can precisely control the grouting volume according to the preset pressure, avoiding reinforcement defects caused by insufficient grouting or grout waste and formation disturbance caused by excessive grouting. Especially in scenarios with complex geological conditions and frequent pressure fluctuations, this intelligent control significantly improves the stability and reliability of the grouting effect.

[0067] The sleeve 802 also has a protrusion 8021 inside, and the end of the protrusion 8021 has a spherical groove 703 that mates with the feed end of the ball valve core 805. The center of the spherical groove 703 has a slurry supply channel for normal material flow, and the ball valve core 805 includes a ball head structure located on the inner side that can be accommodated in the spherical operation.

[0068] When the pressure inside the cavity increases, pushing the ball valve core 805 and the limiting mounting ring 806 to compress the spring 804, the feed end of the ball valve core 805 gradually approaches or even partially embeds into the spherical groove 703 of the protrusion 8021, thereby effectively limiting the backflow of slurry and reducing the amount of slurry discharged.

[0069] Through the cooperative structure of the protruding post 8021 and the ball head valve core 805, on the one hand, when grouting is paused or ended, the spherical groove 703 of the protruding post 8021 contacts the inner ball head of the ball head valve core 805 to form an approximate seal, blocking the grout supply channel entering the ball head valve core 805 and preventing the high-pressure grout in the sealed cavity from flowing back to the grout supply pipeline; on the other hand, when the cavity pressure reaches the target value, the structure automatically restricts the entry of additional grout, playing a role in throttling and precisely controlling the grouting volume, further saving grout material.

[0070] In the specific grouting process, the moving platform 3 is first moved along the track 2 to the section to be grouted. According to the orientation of the section to be grouted (such as the arch, left side wall, or right side wall), the controller controls the differential action of the third telescopic rod 6, causing the support 402 to rotate to the target angle. Subsequently, the controller controls the first telescopic rod 403 and the second telescopic rod 406 to extend synchronously, pushing the arc plate 7 outward until the outer side of the arc plate 7 is tightly attached to the inner wall of the tunnel, forming a sealed cavity.

[0071] After grouting is started, the grout is distributed to each nozzle structure via an electric valve and a distribution pipe 801. In the initial stage of grouting, the pressure inside the sealed cavity is low, the spring 804 is in a naturally extended state, and the nozzle of the ball valve core 805 is fully open.

[0072] As grout is continuously injected, the pressure in the sealed cavity increases, pushing the ball valve core 805 and the limiting mounting ring 806 to compress the spring 804. The annular pressure sensor 803 detects the pressure value in real time and feeds it back to the controller. When the pressure reaches the preset target value, the controller closes the electric ball valve, completing the grouting of this section.

[0073] Finally, the controller controls the first telescopic rod 403 and the second telescopic rod 406 to retract, causing the arc plate 7 to detach from the solidified concrete layer. Then, the moving platform 3 moves to the next construction section and repeats the above process.

[0074] Through the above grouting process, this application realizes fully automated operation from mechanical positioning, seal formation, intelligent grouting to automatic displacement, which significantly improves the construction efficiency, control accuracy and stratum adaptability of grouting reinforcement in tunnels.

[0075] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0076] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A novel grouting device, characterized in that, include: The moving component includes a track (2) and a moving platform (3) that moves along the track (2); At least two support arms (4) are mounted on the mobile platform (3), each support arm (4) includes a mounting base (401), a bracket (402) rotatably connected to the mounting base (401), and a first telescopic rod (403) and a second telescopic rod (406) mounted on the bracket (402); An arc-shaped plate (7) is connected to the far end of the support arm (4), and the arc-shaped plate (7) is used to form a sealed cavity between itself and the inner wall of the tunnel. Grouting assembly (8) is installed on the arc plate (7). The discharge end of the grouting assembly (8) is connected to the sealed cavity and is used to inject grout into the sealed cavity. A drive mechanism is used to drive the bracket (402) to rotate relative to the mounting base (401) in order to adjust the orientation of the arc plate (7); And a controller configured to automatically control the grouting volume of the grouting assembly (8) based on the grout pressure within the sealed cavity.

2. The novel grouting device according to claim 1, characterized in that, The grouting assembly (8) includes: The feed pipe (801) has one feed inlet (8012) and several feed outlets (8011); The nozzle structure is installed on the arc-shaped plate (7) and is used to spray slurry into the sealed cavity; An electric valve is provided on the slurry supply pipeline of the feed inlet (8012), and the electric valve is electrically connected to the controller.

3. The novel grouting device according to claim 2, characterized in that, The nozzle structure includes: The sleeve (802) is fixedly installed on the arc-shaped plate (7); The limiting mounting ring (806) is slidably mounted inside the arc-shaped plate (7); A spring (804) is disposed between the sleeve (802) and the limiting mounting ring (806); And a ball valve core (805) is installed inside the limiting mounting ring (806), and the ball valve core (805) is provided with a nozzle; The limiting mounting ring (806) and the ball valve core (805) together can compress the spring (804) under the pressure of the slurry in the sealed cavity and trigger pressure detection.

4. The novel grouting device according to claim 3, characterized in that, An annular pressure sensor (803) is provided inside the sleeve (802). One end of the spring (804) abuts against the annular pressure sensor (803). The annular pressure sensor (803) is used to detect the pressure value generated when the spring (804) is compressed and transmit the pressure value to the controller.

5. The novel grouting device according to claim 4, characterized in that, The controller is configured to: When the pressure value detected by the annular pressure sensor (803) is less than the preset target pressure, the electric valve is controlled to increase its opening degree; When the pressure value detected by the annular pressure sensor (803) exceeds a preset safety threshold, the electric valve is controlled to close.

6. The novel grouting device according to claim 3, characterized in that, The sleeve (802) is provided with a protrusion (8021), and the end of the protrusion (8021) is provided with a spherical groove that cooperates with the feed end of the ball valve core (805).

7. The novel grouting device according to claim 3, characterized in that, The support arms (4) are connected by a connecting rod (5). The driving mechanism includes a third telescopic rod (6). One end of the third telescopic rod (6) is mounted on the moving platform (3), and the other end is connected to the connecting rod (5). The extension and retraction of the third telescopic rod (6) drives the bracket (402) to rotate around the mounting base (401).

8. The novel grouting device according to claim 3, characterized in that, The bracket (402) is provided with a sliding groove (4022) in the middle. The telescopic end of the first telescopic rod (403) is connected to a sliding rod (404). The sliding rod (404) is limited and locked on the outside of the sliding groove (4022). The sliding groove (4022) is used to limit the movement direction of the sliding rod (404).

9. The novel grouting device according to claim 3, characterized in that, The outer edge of the arc plate (7) is provided with a liner, and the liner, the outer side of the arc plate (7) and the inner wall of the tunnel together constitute the sealed cavity.

10. The novel grouting device according to claim 7, characterized in that, Two sets of support arms (4) are installed on the mobile platform (3). The two sets of support arms (4) are connected by the connecting rod (5). The driving mechanism is connected to the connecting rod (5) to realize the synchronous rotation of the two sets of support arms (4).

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