Concrete lining milling device for tunnel maintenance construction

Abstract

The invention discloses a concrete lining milling device for tunnel maintenance construction, and belongs to the technical field of tunnel construction.The concrete lining milling device comprises a milling mechanism installed on a maintenance truck, the milling mechanism comprises a bearing rocker arm, a milling machine is installed at the top of the bearing rocker arm, and a combined cover body for guaranteeing construction safety is arranged outside the bearing rocker arm; and a negative pressure dust removal assembly for removing dust in the construction environment is arranged on the combined cover body. The buffering pressing wheels are arranged on the two sides of the milling machine, the deformation and falling conditions of a concrete lining are detected in real time through the buffering pressing wheels in the working state of the milling machine, once abnormal displacement of concrete occurs, an alarm can be given out immediately, a constructor is reminded of avoiding in time, passive protection is changed into active early warning, and the working efficiency is improved. Through the combined action of a torsion buffering piece (bearing a torsion spring) and a piezoresistive spring which are arranged in the conversion protection frame body, the impact force of falling concrete fragments can be effectively buffered and absorbed, and the impact force is prevented from directly hurting the milling device and constructors.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction technology, and in particular to a milling device for concrete lining in tunnel maintenance construction. Background Technology

[0002] Tunnel concrete lining is a key structure for ensuring tunnel structural stability, operational safety, and driving comfort. When specific defects such as cracking, spalling, and leakage appear on its surface and endanger structural safety, functional integrity, or long-term durability, repair using milling equipment becomes a necessary engineering measure.

[0003] Currently, tunnel milling and maintenance construction mainly faces the following technical challenges and risks: First, the high-frequency and intense vibrations generated by milling operations can easily cause secondary disturbances to the lining, which already has structural damage. This may lead to the accelerated expansion of existing cracks and the accidental spalling of concrete fragments, seriously threatening the safety of construction personnel and equipment below. Second, traditional protective measures are mostly passive structures with limited functionality. They are difficult to effectively identify and warn of concrete loosening and spalling in the initial stages, and lack effective buffering, guidance, and collection mechanisms for suddenly falling fragments, failing to provide timely and reliable protection in the event of an accident. Third, the large amount of dust generated during the milling process not only pollutes the working environment and affects visibility, but also directly endangers the health of construction personnel. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art, and to propose a concrete lining milling device for tunnel maintenance and construction.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A concrete lining milling device for tunnel maintenance construction includes a milling mechanism installed on a maintenance vehicle. The milling mechanism includes a bearing rocker arm installed on the maintenance vehicle for controlling the movement of the milling mechanism. A milling machine is installed on the top of the bearing rocker arm. A combined cover is provided on the outside of the bearing rocker arm to ensure construction safety. A negative pressure dust removal component is provided on the combined cover to remove dust from the construction environment. Pressure resistance protective plates are provided on both sides of the combined cover through damping connectors. The combined cover located on both sides of the milling machine is connected to a conversion protection frame through a torsion buffer. One end of the conversion protection frame is equipped with a buffer roller that presses against the concrete lining. The conversion protection frame is equipped with an early warning detection component that detects the movement distance of the buffer roller. The early warning detection component is used to detect the degree of deformation of the concrete lining in real time.

[0006] As a preferred embodiment, the combined enclosure consists of a lower material discharge enclosure, a middle dust removal and buffer enclosure, and an upper protective enclosure. The material discharge enclosure is equipped with a switch door on one side for cleaning concrete debris.

[0007] As a preferred embodiment, the negative pressure dust removal assembly includes a negative pressure port opened on the side wall of the dust removal buffer cover, a filter screen is provided at the negative pressure port, a negative pressure dust collection device is connected to the negative pressure port through a negative pressure pipe, and a buffer grid plate is provided on the inner side wall of the dust removal buffer cover located at the negative pressure port, and the buffer grid plate is connected to the side wall of the dust removal buffer cover through a torsion spring shaft.

[0008] As a preferred embodiment, the damping connector includes a connecting vertical seat disposed on the side wall of the protective cover, and a spring damping slider disposed on the side wall of the piezoresistive protective plate and slidably connected to the connecting vertical seat. The spring damping slider applies upward pressure to the piezoresistive protective plate to ensure that the piezoresistive protection is in constant contact with the concrete lining and to block gravel and dust.

[0009] As a preferred embodiment, the torque buffer includes a torque bearing seat disposed on the inner side wall of the protective cover, the torque bearing seat being connected to a bearing shaft via a bearing torsion spring, and the bearing shaft being connected to the conversion protective frame via a sliding offset block.

[0010] As a preferred embodiment, the conversion protective frame includes protective side strips on both sides, a freely rotating guide wheel is provided between the protective side strips, and the buffer pressure wheel is rotatably located at the outermost protective side strip.

[0011] As a preferred embodiment, the protective side strip has an offset sliding opening on its side wall, and the sliding offset block has limit openings at both ends. The sliding offset block is slidably disposed in the offset sliding opening, and both ends are fixedly provided with limit sliding rods located in the limit openings. The limit sliding rod located on one side is connected to the inner wall of the limit opening through a compression spring.

[0012] As a preferred embodiment, the early warning detection component includes a test block disposed at the end of the limiting slide bar on the other side, and a displacement sensor is disposed inside the limiting port to measure the movement distance of the test block.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention provides buffer pressure rollers on both sides of the milling machine. These rollers monitor the deformation and detachment of the concrete lining in real time while the milling machine is in operation. If any abnormal displacement of the concrete occurs, an alarm will be issued immediately to remind construction personnel to take timely precautions, transforming passive protection into proactive early warning.

[0014] 2. This invention, by setting up conversion protective frames on both sides of the milling machine, and through the combined action of torsion buffers (load-bearing torsion springs) and compression springs set in the conversion protective frames, can effectively buffer and absorb the impact force of falling concrete fragments, preventing them from causing direct injury to the milling device and construction personnel. Under the guidance of the conversion protective frames and guide wheels, the falling concrete fragments are orderly and slowly guided into the combined cover, and after being further slowed down by the buffer grid plate, they are finally collected in the bottom discharge cover, which is convenient for centralized cleaning and avoids the random scattering of fragments.

[0015] 3. The combined cover and the pressure resistance protection plates on both sides of the present invention together form a physical isolation space, which isolates the milling area from the external environment, effectively blocking the flying gravel and dust, and actively absorbs a large amount of dust generated during the milling process through the negative pressure dust removal component, which significantly improves the construction environment in the tunnel, protects the health of construction personnel, and reduces the impact of dust on other equipment in the tunnel. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a concrete lining milling device for tunnel maintenance and construction proposed in this invention; Figure 2 This is a schematic diagram of the combined structure of a concrete lining milling device for tunnel maintenance construction proposed in this invention. Figure 3 This is a schematic diagram of the structural assembly of the conversion protective frame in a concrete lining milling device for tunnel maintenance and construction proposed in this invention. Figure 4 for Figure 3 Enlarged structural diagram at point A; Figure 5 This is a schematic diagram of the combined cover structure in a concrete lining milling device for tunnel maintenance and construction proposed in this invention. Figure 6 This is a schematic diagram of the installation structure of the conversion protective frame and the milling machine in a concrete lining milling device for tunnel maintenance and construction proposed in this invention.

[0017] In the diagram: 1. Bearing rocker arm; 2. Milling machine; 3. Discharge hood; 4. Dust removal buffer hood; 5. Protective hood; 6. Conversion protective frame; 601. Protective side strip; 602. Guide wheel; 603. Buffer pressure wheel; 7. Negative pressure pipe; 8. Buffer grid plate; 9. Connecting vertical seat; 10. Spring damping slider; 11. Torque bearing seat; 12. Bearing shaft; 13. Sliding offset block; 14. Offset slide; 15. Limiting port; 16. Limiting slide rod; 17. Measured block; 18. Displacement sensor; 19. Piezoresistive protective plate. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention 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 the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] Example, refer to Figures 1 to 6 A concrete lining milling device for tunnel maintenance construction includes a milling mechanism installed on a maintenance vehicle. The milling mechanism includes a load-bearing rocker arm 1 installed on the maintenance vehicle for controlling the movement of the milling mechanism. A milling machine 2 is installed on the top of the load-bearing rocker arm 1. Both the milling machine 2 and the load-bearing rocker arm 1 are existing technologies and will not be described in detail here. They can process the concrete lining by controlling the power. A combined cover is provided on the outside of the load-bearing rocker arm 1 to ensure construction safety. Furthermore, the combined enclosure consists of a lower pouring enclosure 3, a middle dust removal and buffer enclosure 4, and an upper protective enclosure 5. A switch door for cleaning concrete debris is provided on one side of the pouring enclosure 3. The bottom of the pouring enclosure 3 is in a sealed connection with the supporting rocker arm 1, so the collected concrete debris will be concentrated at the pouring enclosure 3. The switch door facilitates the centralized cleaning of the collected concrete debris after construction.

[0022] The modular cover is equipped with a negative pressure dust removal component for dust removal in the construction environment. Further, the negative pressure dust removal component includes a negative pressure port opened on the side wall of the dust removal buffer cover 4, a filter screen is installed at the negative pressure port, and a negative pressure dust collection device is connected to the negative pressure port through a negative pressure pipe 7. A buffer grid plate 8 is installed on the inner side wall of the dust removal buffer cover 4 located at the negative pressure port, and the buffer grid plate 8 is connected to the side wall of the dust removal buffer cover 4 through a torsion spring shaft.

[0023] The combined cover has pressure resistance protection plates 19 installed on both sides through damping connectors. The top of the pressure resistance protection plate 19 is an arc shape consistent with the tunnel, and there is a notch on it for the installation of the damping connectors. The combined cover and the pressure resistance protection plates 19 on both sides together form a physical isolation space, which isolates the milling area from the external environment and effectively blocks flying gravel and dust. The damping connector includes a connecting vertical seat 9 set on the side wall of the protective cover 5, and a spring damping slider 10 slidably connected to the connecting vertical seat 9 on the side wall of the pressure resistance protective plate 19. The spring damping slider 10 applies upward pressure to the pressure resistance protective plate 19 to ensure that the pressure resistance protection is in contact with the concrete lining at all times, thereby blocking the gravel and dust.

[0024] The combined cover on both sides of the milling machine 2 is connected to the conversion protective frame 6 by a torsion buffer. One end of the conversion protective frame 6 is provided with a buffer pressure roller 603 to press the concrete lining. Furthermore, the conversion protective frame 6 includes protective side strips 601 on both sides, and a freely rotating guide roller 602 is provided between the protective side strips 601. The buffer pressure roller 603 is rotatably set at the protective side strip 601 at the far end.

[0025] When the cracked and damaged concrete lining cracks and falls off under the vibration of the milling machine 2, the concrete on both sides will fall under the action of gravity and immediately squeeze the buffer roller 603 that is in contact with it, thereby triggering the early warning detection component to trigger an early warning; under the action of the guide roller 602 on the conversion protective frame 6, the concrete will gradually slide into the combined cover, thereby reducing its falling speed.

[0026] Furthermore, the torque buffer includes a torque bearing seat 11 disposed on the inner side wall of the protective cover 5. The torque bearing seat 11 is integrally disposed on the protective cover 5 and bears the torsional force through the protective cover 5. The torque bearing seat 11 is connected to the bearing shaft 12 through the bearing torsion spring. The bearing shaft 12 is connected to the conversion protective frame 6 through the sliding offset block 13. It should be noted that the load-bearing torsion spring is one of the torsion springs. The resistance applied to the rotation of the load-bearing shaft 12, under the action of the torsion buffer, can make both sides of the conversion protection frame 6 in a tilted state (the tilt angle of the conversion protection frame can be ensured by setting a blocking block on the side wall of the combined cover).

[0027] The protective side strip 601 has an offset sliding opening 14 on its side wall. The sliding offset block 13 has limit openings 15 at both ends. The sliding offset block 13 is slidably disposed in the offset sliding opening 14, and both ends are fixedly provided with limit sliding rods 16 located in the limit openings 15. The limit sliding rod 16 located on one side is connected to the inner wall of the limit opening 15 through a compression spring. The compression spring applies resistance to the sliding offset block 13, thereby ensuring that resistance is generated when the protective frame 6 slides downward, and buffering the concrete debris.

[0028] When the milling machine 2 is performing milling, if damaged concrete falls directly under the action of vibration, the falling concrete will squeeze the buffer roller 603 in contact with it, causing the buffer roller 603 to move downward. At the same time as it moves downward, the conversion protective frame 6 will flip over. The conversion protective frame 6 will be buffered by the load-bearing torsion spring and the compression spring respectively when it flips and moves.

[0029] It is worth noting that the concrete lining inside the tunnel is designed in a "semi-circular arch" shape. When the concrete breaks, the falling concrete mainly occurs at the top of the arch, where the arch support is weakest. Therefore, when the concrete falls, it will fall from the top, and the pressure will first act on the top buffer roller 603. The middle part will not fall due to the compression of the milling machine 2. Thus, through the unique design of the conversion protective frame 6, the falling concrete can be effectively supported and guided.

[0030] The conversion protective frame 6 is equipped with an early warning detection component that detects the moving distance of the buffer pressure roller 603. The early warning detection component is used to detect the degree of deformation of the concrete lining in real time.

[0031] Furthermore, the early warning detection component includes a test block 17 disposed at the end of the limit slide bar 16 on the other side, and a displacement sensor 18 disposed inside the limit port 15 for measuring the moving distance of the test block 17. The displacement sensor 18 is connected to an alarm device controlled by an electrical signal. When the cracked and damaged concrete lining cracks and falls off under the vibration of the milling machine 2, the concrete on both sides moves downward under the action of gravity, which will immediately squeeze the buffer roller 603 that is in contact with it, thereby triggering the signal of the displacement sensor 18 to realize the early warning.

[0032] When the concrete lining in a tunnel cracks and leaks and needs reinforcement, milling is required. During milling, the milling machine 2 is moved to the corresponding construction position by the bearing rocker arm 1. At this time, under the combined action of the bearing torsion spring and the compression spring, the buffer rollers 603 set at the ends of the protective frame 6 on both sides of the milling machine 2 effectively compress the concrete in front and behind the milling displacement position. When the cracked and damaged concrete lining cracks and falls off under the vibration of the milling machine 2, the concrete on both sides moves downward under the action of gravity and will immediately squeeze the buffer rollers 603 that are in contact with it. When the buffer rollers 603 are squeezed, they will drive the protective frame 6 to move downward and generate displacement. At this time, the displacement change set between the displacement sensor 18 and the measured block 17 will generate a displacement signal, thereby triggering the alarm device to remind the construction personnel and reduce the safety risks of milling. When the milling machine 2 is performing milling, if damaged concrete falls directly under the action of vibration, the falling concrete will squeeze the buffer roller 603 in contact with it, causing the buffer roller 603 to move downward. At the same time as it moves downward, the conversion protective frame 6 will flip. As the conversion protective frame 6 moves downward and flips, the pressure spring and the load-bearing torsion spring work together to reduce the impact force of the concrete. Under the action of the guide roller 602 set on the conversion protective frame 6, the concrete fragments slowly slide down into the combined hood. The buffer grid plates 8 set layer by layer on the dust removal buffer hood 4 will further reduce the impact force of the concrete, so that the concrete can slowly fall into the discharge hood 3 below, thereby protecting the equipment and personnel. During construction, the negative pressure dust collection device generates suction inside the combined hood through the negative pressure pipe 7. Under the action of suction, the dust generated during concrete milling is concentrated and absorbed, thereby ensuring the construction environment inside the tunnel.

[0033] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A milling device for concrete lining during tunnel maintenance construction, comprising a milling mechanism mounted on a maintenance vehicle, characterized in that, The milling mechanism includes a bearing rocker arm (1) installed on the maintenance vehicle for controlling the movement of the milling mechanism. A milling machine (2) is installed on the top of the bearing rocker arm (1). A combined cover is provided on the outside of the bearing rocker arm (1) to ensure construction safety. A negative pressure dust removal component is provided on the combined cover to remove dust from the construction environment. Pressure resistance protection plates (19) are provided on both sides of the combined cover through damping connectors. The combined cover located on both sides of the milling machine (2) is connected to a conversion protection frame (6) by a torsion buffer. One end of the conversion protection frame (6) is provided with a buffer roller (603) that presses the concrete lining. The conversion protection frame (6) is provided with an early warning detection component that detects the moving distance of the buffer roller (603). The early warning detection component is used to detect the degree of deformation of the concrete lining in real time.

2. The concrete lining milling device for tunnel maintenance construction according to claim 1, characterized in that, The combined enclosure consists of a lower material discharge enclosure (3), a middle dust removal buffer enclosure (4), and an upper protective enclosure (5). The material discharge enclosure (3) has a switch door on one side for cleaning concrete debris.

3. A concrete lining milling device for tunnel maintenance construction according to claim 2, characterized in that, The negative pressure dust removal assembly includes a negative pressure port opened on the side wall of the dust removal buffer cover (4), a filter screen is provided at the negative pressure port, and a negative pressure dust collection device is connected to the negative pressure port through a negative pressure pipe (7). A buffer grid plate (8) is provided on the inner side wall of the dust removal buffer cover (4) located at the negative pressure port. The buffer grid plate (8) is connected to the side wall of the dust removal buffer cover (4) through a torsion spring shaft.

4. A concrete lining milling device for tunnel maintenance construction according to claim 3, characterized in that, The damping connector includes a connecting vertical seat (9) set on the side wall of the protective cover (5), and a spring damping slider (10) slidably connected to the connecting vertical seat (9) on the side wall of the pressure resistance protective plate (19). The spring damping slider (10) applies upward pressure to the pressure resistance protective plate (19) to ensure that the pressure resistance protection is in contact with the concrete lining at all times, thereby blocking the gravel and dust.

5. A concrete lining milling device for tunnel maintenance construction according to claim 4, characterized in that, The torque buffer includes a torque bearing seat (11) disposed on the inner side wall of the protective cover (5). The torque bearing seat (11) is connected to a bearing shaft (12) via a bearing torsion spring. The bearing shaft (12) is connected to the conversion protective frame (6) via a sliding offset block (13).

6. A concrete lining milling device for tunnel maintenance construction according to claim 5, characterized in that, The conversion protective frame (6) includes protective side strips (601) on both sides, and a freely rotating guide wheel (602) is provided between the protective side strips (601). The buffer pressure wheel (603) is rotatably set at the protective side strip (601) at the far end.

7. A concrete lining milling device for tunnel maintenance construction according to claim 6, characterized in that, The protective side strip (601) has an offset sliding opening (14) on its side wall. The sliding offset block (13) has limit openings (15) at both ends. The sliding offset block (13) is slidably disposed in the offset sliding opening (14), and both ends are fixedly disposed with limit sliding rods (16) located in the limit openings (15). The limit sliding rod (16) located on one side is connected to the inner wall of the limit opening (15) through a pressure resistance spring.

8. A concrete lining milling device for tunnel maintenance construction according to claim 7, characterized in that, The early warning detection component includes a test block (17) set at the end of the limit slide bar (16) on the other side. A displacement sensor (18) is set inside the limit port (15) to measure the moving distance of the test block (17).

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