A secondary lining material placement device and method

Abstract

The present application relates to a kind of secondary lining material distribution device and method, including frame body, material distributor and multi-section pump pipe.Material distributor is movably arranged on track.Multi-section pump pipe is formed by movable connecting pipe in series, forms the conveying pipeline that is internally connected and can be bent, the first end of multi-section pump pipe is anchoring end, spatial position is fixed relative to two frame bodies by certain point constraint, the second end of multi-section pump pipe is driving end, is connected on material distributor.Driving end follows material distributor and moves, each movable connecting pipe of multi-section pump pipe generates rotation, so that multi-section pump pipe is in the constraint space between two frame bodies, forms and presents from the continuously changing spatial curve shape of at least one bending portion between stretch state to compression state.The present application uses mobile material distributor to cooperate with movable multi-section pump pipe, need not be again separately configured long distance conveying pipeline for each grouting port, greatly reduces the quantity and total length of grouting conveying pipeline, simplifies system structure.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction equipment technology, specifically to a secondary lining material placement device and method. Background Technology

[0002] In tunnel construction, after the initial support is completed, secondary lining is required, which involves pouring concrete into the tunnel wall to form a permanent lining structure. The tunnel lining trolley is a key piece of equipment for implementing secondary lining, and its formwork system is typically between 6 and 12 meters in length. Due to its large size, multiple grouting ports are usually distributed on both sides and the top of the lining trolley to complete the concrete pouring of the entire cross-section.

[0003] In existing technologies, fixed concrete placing booms are commonly used for concrete delivery. The placing boom is fixed in position, while the grouting ports are distributed at different locations on the lining trolley, especially some ports far from the boom. Therefore, a separate grouting delivery pipe needs to be configured for each grouting port, with all pipe inlets arranged circumferentially around the placing boom, either in a ring or along both sides longitudinally. During construction, the distribution pipes are driven to oscillate in a circular motion, sequentially aligning with each inlet for concrete pouring. However, this arrangement has significant drawbacks: First, due to the large number of grouting delivery pipes, and the fact that most of these pipes are significantly longer because they need to connect to grouting ports located far from the concrete placing head, the number of pipe bends increases. Current technology requires closed-loop pressure delivery of concrete over long distances, and because the placing port pipes in this arrangement typically use telescopic structures, a stepped structure is formed between the inner and outer pipes. Sudden changes in pipe diameter at the junction of the inner and outer pipes easily create concrete turbulence, greatly increasing the likelihood of blockage. Second, the entire pipeline system is complex, occupies a large amount of space, and is difficult to install. Furthermore, after the pouring operation is completed, the numerous and lengthy pipes need to be cleaned, which is not only labor-intensive but also makes it difficult to completely remove residual concrete from the pipes, easily causing blockages, reducing placing efficiency, and affecting subsequent performance and equipment lifespan. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a secondary lining material laying device and method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A secondary lining fabric installation device, comprising: Two frames set at relative intervals; The track is laid between the two frames and extends along their length. The fabric laying machine is movably mounted on the track; A multi-section pump pipe is formed by connecting multiple rigid pipe sections in series via movable connecting pipes, creating an internally connected and flexible delivery pipeline; among which, The first end of the multi-segment pump pipe is the anchoring end, and its spatial position is fixed relative to the two frames by a certain point constraint. The second end of the multi-segment pump pipe is the drive end, which is connected to the fabric placing machine; The fabric placing machine is configured such that when it is driven to reciprocate along the track, the multi-segment pump pipe is pulled or pushed by the drive end, forcing each of the movable connecting pipes to rotate, thereby enabling the multi-segment pump pipe to form and present a spatial curve shape with at least one bending portion within the constrained space between the two frames, where the shape continuously changes between the tensile and compressed states.

[0006] Furthermore, the movable connecting pipe is a hinged pipe joint, and the multi-segment pump pipe is composed of four rigid pipe segments connected in series through three hinged pipe joints, namely the first pump pipe, the second pump pipe, the third pump pipe and the fourth pump pipe. The inlet end of the first pump pipe constitutes the anchoring end, and the outlet end of the fourth pump pipe constitutes the driving end. The two frames are the first frame and the second frame, and the fixed-point constraint is achieved by the pump pipe rotation assembly, which is located in the middle section of the first frame. The feed end of the first pump pipe is rotatably connected to the pump pipe rotation assembly. The fabric device also includes a limiting mechanism, which has a guiding mechanism and a locking mechanism that work together. The guiding mechanism consists of a guide groove and a guide pin; The guide groove is fixed to the inner side of the second frame and extends along its length. The end of the guide groove near the pump pipe rotary assembly is the outlet. A guide pin is fixed to a hinged pipe joint connecting the third pump pipe and the second pump pipe. The guide pin and the guide groove form a sliding guide fit. The guide pin can be disengaged from or enter the guide groove through the outlet. A locking mechanism, located on the first frame and on one side of the outlet, is used to lock or release the first pump tube. When the guide pin is located in the guide groove, the locking mechanism releases the first pump tube; when the guide pin leaves the outlet, the locking mechanism locks the first pump tube. When the fabric placing machine is driven, the guide pin moves synchronously with the fabric placing machine, slides along the guide groove and continues to slide after being separated from the outlet until the fabric placing machine runs to the end of the track; the movement trajectory of the guide pin is fixed, and the multi-segment pump pipe moves back and forth between the two ends of the track along the trajectory.

[0007] Furthermore, the movement trajectory of the guide pin transitions from a straight line to a curve with the outlet as the turning point.

[0008] Furthermore, the hinged pipe joint has a first bend and a second bend; the first bend and the second bend each have an arc-shaped pipe and two ports located at both ends of the arc-shaped pipe; the axes of the two ports are perpendicular to each other; one port of the first bend and one port of the second bend are rotatably connected by a hinge shaft, and the other ports of the first bend and the second bend are respectively used to connect two adjacent rigid pipe sections.

[0009] Furthermore, the guide pin is disposed on the outer wall of the hinged pipe joint connecting the third pump pipe and the second pump pipe, and its position corresponds to the radial region of the hinged end face of the hinged pipe joint, and extends along the hinged axis of the hinged pipe joint.

[0010] Furthermore, when the fabric placing machine is located at the end of the track away from the anchoring end, the included angle between the center lines of the first pump pipe and the second pump pipe is limited to less than 180 degrees and greater than 90 degrees.

[0011] Furthermore, the outlet is configured in a flared shape.

[0012] Furthermore, at least the straight-line distance between the two ends of the first pump pipe, the second pump pipe, and the third pump pipe is less than the interval distance between the two frames.

[0013] Furthermore, when the locking mechanism locks the first pump tube, an arc formed with the hinge shaft between the first and second pump tubes as the center and the distance from the center of the guide pin to the hinge shaft as the radius is tangent to the center line of the outlet. This arrangement allows the guide pin to smoothly disengage from the outlet.

[0014] Furthermore, the fourth pump pipe is fixed to the fabric placing machine.

[0015] Furthermore, the locking mechanism includes an electric push rod, a stop, and a baffle; the cylinder end of the electric push rod is hinged to the upper end of the first frame, the stop is fixed on the first frame and located below the electric push rod, one end of the baffle is hinged to the free end of the stop, the other end of the baffle is provided with an arc groove, and the rod end of the electric push rod is slidably connected to the arc groove through a pin.

[0016] Furthermore, in the multiple pump pipe segments, at least one segment has a straight-line distance between its two endpoints that is less than the interval between the two frames.

[0017] Furthermore, the movable connecting pipe has a first bend and a second bend; the first bend and the second bend each have an arc-shaped pipe and two ports located at both ends of the arc-shaped pipe; the axes of the two ports are perpendicular to each other; one port of the first bend and one port of the second bend are rotatably connected.

[0018] Furthermore, the two frames are designated as the first frame and the second frame; The track is a guide rail frame consisting of a pair of parallel guide rails fixed to the first frame and the second frame; The movable connecting pipe is a hinged pipe joint, and the multiple pump pipes are connected in series through this hinged pipe joint to form an unfoldable structure that can present a wavy spatial curve. The fixed-point constraint is achieved by a pump pipe rotary assembly, which is located at the end of the guide rail frame; the anchoring end is movably sleeved on the pump pipe rotary assembly; When the fabric placing machine is driven, the included angle between adjacent pipe sections is changed.

[0019] Furthermore, a pump pipe support groove is fixedly connected between a pair of guide rails located below the guide rail frame, and at least one section of the multiple pump pipes is fixedly connected to a support device, which is connected to the pump pipe support groove and can slide back and forth in the support groove.

[0020] Furthermore, the support device is fixed on the outer peripheral surface of at least one pump pipe in the middle of its length direction.

[0021] Furthermore, except for the drive end pump pipe, the straight-line distance between the two ends of the other pump pipes is less than the interval distance between the two frames.

[0022] Furthermore, the track is a guide rail frame composed of a pair of guide rails arranged in parallel and at relative intervals between the first frame and the second frame.

[0023] Furthermore, the movable connecting pipe is configured such that no two pump pipes interfere with each other during the formation of the spatial curve shape of the multi-segment pump pipe.

[0024] Furthermore, the concrete placing boom has a distributing head assembly for distributing concrete output, and the drive end is connected to the distributing head assembly.

[0025] Furthermore, the fabric placing machine also has a base and an upper seat; Rollers are connected to both sides of the base to form a movable vehicle structure; the rollers on both sides of the base are rotatably connected to the guide grooves on both sides of the guide rail frame; the base is provided with a walking drive mechanism that drives the entire fabric placing machine to move on the guide rail frame. The material distribution head assembly is located on the top of the upper seat. The material distribution head assembly has a material distribution pipe and a material distribution head swing body. The material distribution pipe is connected to the material distribution head swing body, and the material distribution head swing body drives the material distribution pipe to swing. The upper seat is vertically connected to the top of the base body, and the upper seat is driven to rise and fall by a lifting driver fixed on the base body, thereby driving the material distribution pipe to rise and fall.

[0026] Furthermore, the material distribution head swing body includes an elbow, a rotating frame, a support frame, and a rotating reducer assembly; The slewing frame and the support frame are fixed at a relative interval on the top surface of the upper seat. One end of the elbow is rotatably connected to the slewing frame and rotatably connected to the discharge end of the material distribution pipe assembly through a movable sealing joint. The other end of the elbow is connected and fixed to the lower port of the material distribution pipe through a pipe clamp. A reinforcing seat is fixed to the outside of the bend of the elbow, and the side of the reinforcing seat is rotatably connected to the support frame via a support shaft. The rotary reducer assembly is fixedly connected to the rotary frame and driven to one end of the elbow. The rotary reducer assembly drives the elbow to rotate, thereby causing the material distribution pipe to swing.

[0027] Furthermore, let the end of the track away from the guide slot outlet be the near end and the other end be the far end. When the concrete placing machine is driven and pushes the multi-segment pump pipe to move along the track from the near end to the far end, the concrete placing machine sequentially pours concrete into the grouting port on the lining trolley. Among them, the fourth pump pipe does not swing during the movement of the concrete placing machine; let the central axis of the pump pipe rotation assembly be axis A, the hinge axis of the first and second pump pipes be axis B, and the hinge axis of the second and third pump pipes be axis C. During the process S1 of the concrete placing boom moving from the near end to the far end of the track, the operation of the multi-section pump pipe is as follows: As the guide pin moves forward along the guide groove, the third pump tube remains forward without swinging, the first pump tube swings towards the locking mechanism with the A-axis as the pivot point, and the second pump tube moves between the first and third pump tubes. When the guide pin disengages from the outlet of the guide groove, the first pump pipe abuts against the first frame, and the movement trajectory of the guide pin will transition from a straight line to a curve. At this time, the locking mechanism will activate to limit the first pump pipe. Then, as the placing machine continues to move forward to the far end of the track, the first pump pipe is restricted and remains stationary. Driven by the placing machine, the second pump pipe continues to swing towards the far end of the guide rail with the B axis as the pivot point, and the third pump pipe swings towards the end of the track with the C axis as the pivot point, until the placing machine reaches the end of the track. The movement trajectory of the guide pin is limited by the limiting mechanism. In the process S2, where the multi-segment pump pipe is moved and reset along the far end of the track to the near end by the fabric placing machine, the action of the multi-segment pump pipe is the reverse process of the multi-segment pump pipe action process in the above process S1.

[0028] By adopting the above technical solution, the beneficial effects of the present invention are as follows: 1. This invention uses a mobile concrete placing machine in conjunction with a swingable multi-segment pump pipe, eliminating the need for a separate long-distance conveying pipeline for each grouting port. The concrete placing machine can move precisely along the guide rail to the grouting port positions on the top and sides of the trolley, achieving full coverage of all grouting ports on the trolley. This greatly reduces the number and total length of grouting conveying pipelines, effectively avoiding frequent pipe blockages caused by excessive pipe length, too many joints, and long working intervals between pipelines due to sequential grouting at each grouting port. It simplifies the structure of the entire concrete placing system, and only the multi-segment pump pipe needs to be cleaned and flushed after the grouting work is completed.

[0029] 2. Through the cooperation of the guiding mechanism and the locking mechanism, the switching of the swing fulcrum point of the multi-segment pump pipe during the forward and reset process is realized, so that the movement trajectory of the guide pin is fixed, and the multi-segment pump pipe reciprocates along the trajectory within the constrained space between the two frames, making the entire fabric laying process smoother.

[0030] 3. The present invention can also realize the vertical movement of the material distribution pipe through the lifting drive and realize its swing through the swing body of the material distribution head. The combination of the two movements can make the top pressure joint at the top of the material distribution pipe accurately aligned with and tightened against different grouting ports at the top of the tunnel. It abandons the traditional expansion joint structure and avoids the jamming problem caused by residual concrete in the expansion joint. The equipment is reliable in operation, easy to maintain and has a long service life. Attached Figure Description

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Figure 1 This is a three-dimensional schematic diagram of the secondary lining fabric device of the present invention; Figure 2 This is a top view of the secondary lining material placing device of the present invention with the material placing machine located at the near end; Figure 3 This is a schematic diagram of the structure when the guide pin and guide groove of the present invention are engaged; Figure 4 This is a side view of the locking mechanism of the present invention; Figure 5 This is a top view of the locking mechanism of the present invention during operation; Figure 6 This is a schematic diagram of the movable connecting pipe of the secondary lining material placing device of the present invention; Figure 7 This is a top view of the far end of the secondary lining material placement device of the present invention; Figure 8 This is a schematic diagram illustrating the movement trajectory of the guide pin during operation. Figure 9 This is a 3D schematic diagram of a fabric placing machine; Figure 10 This is a schematic diagram of a three-dimensional fabric placing machine from another perspective (the dust cover is removed from the diagram). Figure 11 This is a front view of the fabric placing machine (dust cover removed). Figure 12 This is a perspective view of a secondary lining fabric device according to another embodiment of the present invention; Figure 13 This is a top view of a secondary lining fabric device according to another embodiment of the present invention. Detailed Implementation

[0032] In this invention, the "anchor end" refers to one end of the multi-segment pump pipe that is constrained and connected to the frame. Its core function is to provide a spatial reference point for the movement of the entire pipeline. The connection method includes, but is not limited to, any constraint form that can realize the function of the reference point, such as fixed connection or hinged connection.

[0033] like Figure 1-11 As shown, a first embodiment of the secondary lining material placing device of the present invention is applied to a lining trolley with a length of 6-12 meters. It has two frames 1, a material placing machine 2, and multiple pump pipes 3. The two frames 1 are a first frame 11 and a second frame 12 that are fixed to the lining trolley at a relative interval. A track is fixed between the first frame 11 and the second frame 12. The track is a guide rail frame 13 composed of a pair of guide rails that are arranged in parallel and at a relative interval between the first frame 11 and the second frame 12. The material placing machine 2 is connected to the guide rail frame 13 and can move back and forth along the track.

[0034] In this embodiment, the multi-segment pump pipe 3 is composed of four rigid pipe segments connected in series via three hinged pipe joints, including a first pump pipe 31, a second pump pipe 32, a third pump pipe 33, and a fourth pump pipe 34. At least the straight-line distance between the two endpoints of the first pump pipe 31, the second pump pipe 32, and the third pump pipe 33 is less than the interval between the two frames, thus preventing interference between the multi-segment pump pipe 3 and the two frames during swing deformation. In this embodiment, the straight-line distance between the two endpoints of the four rigid pipe segments is less than the interval between the two frames. The ends of adjacent pump pipe segments are rotatably connected via hinged pipe joints. The height between the four rigid pipe segments is... The four pump pipes are arranged in a low-staggered manner, with the second pump pipe 32 at the highest position, the first pump pipe 31 and the third pump pipe 33 in the middle layer, and the fourth pump pipe 34 at the lowest layer. During operation, the four rigid pipe sections perform their respective functions without interfering with each other. The inlet end of the first pump pipe 31 is movably sleeved on the pump pipe rotary assembly 4 and connected to the output pipe of the concrete pump truck. The outlet end of the fourth pump pipe 34 forms the drive end, which is connected to the concrete placing machine. The concrete placing machine 2 uses pipe clamps 228 to limit and fix both ends of the fourth pump pipe 34, restricting the swing of the fourth pump pipe 34. The concrete placing machine 2 achieves reciprocating motion on the track by pushing or pulling multiple pump pipe sections, thereby delivering concrete slurry to each grouting port.

[0035] The hinged pipe joint 36 used in this embodiment has a first bend 361 and a second bend 362. The first bend 361 and the second bend 362 each have two ports and an arc-shaped pipe. The arc-shaped pipe is a 90-degree arc. The two ports are fixed to both ends of the arc-shaped pipe, and their axes are perpendicular to each other. One port of the first bend 361 is rotatably connected to one port of the second bend 362, forming a rotary kinematic pair. In the hinged pipe joint 36 at the connection between the first pump pipe 31 and the second pump pipe 32: the other port 3611 of the first bend 361 is fixedly connected to the discharge end of the first pump pipe 31, and the other port 3621 of the second bend 362 is fixedly connected to the inlet end of the second pump pipe 32. Similarly, each pipe segment is connected sequentially to form a bendable pipeline.

[0036] The first frame 11 has a pump pipe rotary assembly 4 in the middle section. The feed end of the first pump pipe 31 is movably sleeved on the pump pipe rotary assembly and connected to the output pipe of the concrete pump truck. It is constrained at a fixed point and forms an anchor end. The first pump pipe 31 can rotate about the center of the pump pipe rotary assembly 4, but cannot be displaced.

[0037] The inner wall of the second frame 12 is fixed above the guide rail frame 13 with a guide groove 5 along the length of the second frame 12. The guide groove 5 is a groove shape with the opening facing upward. The end of the guide groove 5 near the pump pipe rotary assembly 4 is the outlet 51 (there is still a distance between the outlet 51 and the end of the guide rail frame 13). A guide pin 35 is provided on the outer wall of the bottom of the hinged pipe joint 36 connecting the third pump pipe 33 and the second pump pipe 32. Its position corresponds to the radial area of ​​the hinge end face of the hinged pipe joint 36, and extends along the hinge axis of the hinged pipe joint 36 and is embedded in the groove of the guide groove 5. The guide pin 35 can slide in the guide groove 5. At the same time, the guide pin can be disengaged from or enter the guide groove 5 through the outlet 51. In order to make the guide pin 35 move in and out of the outlet 51 more smoothly, it can be set as a flared shape. The guide pin 35 can be fixed by welding or other methods.

[0038] A locking mechanism 6 is provided on the first frame 11 and on one side of the guide rail frame 13 at the far end 132. The locking mechanism 6 is used to limit the first pump tube 31. When the guide pin 35 is in the guide groove 5, the locking mechanism 6 releases the first pump tube 31. The first pump tube 31 swings around the central axis of the pump tube rotary assembly 4. When the guide pin leaves the outlet 51, the locking mechanism 6 locks the first pump tube 31, and the guide pin 35 can continue to move.

[0039] Combination Figures 2 to 8 In this embodiment, a complete working cycle of a secondary lining material placement device is as follows: (1) Initial state: such as Figure 2 As shown, the end of the placing boom 2 located on the guide rail frame 13 away from the guide groove 51 is the near end 131, which is the starting point of the placing boom 2's outward journey, and the other end is the far end 132, which is the ending point of the placing boom 2's outward journey. When the fabric placing machine 2 is at the starting position, the multi-segment pump pipe is in a bent state. At least three of the points in a set of position points formed by the spatial fixed point of the anchor end, the spatial connection point of the drive end, and the hinge center of each movable connecting pipe are not on the same straight line. In order to make the multi-segment pump pipe 3 move more smoothly, the included angle between the center lines of the first pump pipe 31 and the second pump pipe 32 is limited to less than 180 degrees and greater than 90 degrees. In this embodiment, 178 degrees is preferred. The setting of the end position of the guide groove 5 away from the outlet 51 should ensure that the guide pin 35 is located in the guide groove 5 when the fabric placing machine 2 is in the initial position.

[0040] (2) Outward stroke (pushing stage): The drive mechanism starts, and the placing machine 2 moves from the near end 131 to the far end 132 along the guide rail frame 13. Its drive end pushes the multi-segment pump pipe to move. The hinged pipe joint connecting the second pump pipe 32 and the third pump pipe 33 drives the guide pin 35 to slide along the guide groove 5. The guide pin 35 slides in the guide groove 5 to limit the movement of the multi-segment pump pipe. The multi-segment pump pipe 3 swings with the central axis of the pump pipe rotary assembly 4 as the pivot point. It is deformed within the space limited between the first frame 11 and the second frame 12 and moves towards the guide outlet 51. Specifically, in this process, the third pump pipe 33 keeps moving forward without swinging. The first pump pipe 31 swings towards the locking mechanism 6 with the central axis of the pump pipe rotary assembly 4 as the pivot point. The second pump pipe 32 moves towards the locking mechanism 6 with the first pump pipe 31 and the third pump pipe 32. The first pump pipe 31 moves with the first frame 11. When the first pump pipe 31 swings to be roughly parallel to the first frame 11, the locking mechanism 6 is activated to lock the first pump pipe 31 and limit its movement. The guide pin 35 reaches the outlet 51. At this time, the arc formed with the center of the hinge axis between the first pump pipe 31 and the second pump pipe 32 as the center and the distance from the center of the guide pin to the center of the hinge axis as the radius is tangent to the center line of the outlet. This setting allows the guide pin to smoothly disengage from the outlet and also determines the spatial position of the outlet 51. Then, in order to obtain a longer moving distance, when the guide pin 35 leaves the guide groove 5 from the outlet 51, the multi-segment pump pipe 3 continues to move in the direction of extension of the guide rail frame 13. Since the locking mechanism 6 locks the first pump pipe 31, the fabric placing machine 2 continues to move forward, and the movement trajectory of the guide pin 35 changes from a straight line to a curve. Then, as the concrete placing machine 2 continues to advance to the far end 132 of the guide rail frame 13, the first pump pipe 31 is restricted and remains stationary. Driven by the concrete placing machine 2, the second pump pipe 32 swings towards the direction of the concrete placing machine 2 with the hinge axis of the first pump pipe 31 and the second pump pipe 32 as the pivot point. The third pump pipe 33 swings towards the direction of the concrete placing machine 2 with the hinge axis of the second pump pipe 32 and the third pump pipe 33 as the pivot point. The journey continues until the concrete placing machine 2 reaches the final grouting port, the concrete placing machine 2 reaches the end point, and the journey ends. (3) Return trip: (Traction stage) The process of the concrete placing machine 2 pulling the multi-section pump pipe 3 from the far end 132 back to the near end 131 is the reverse process of the above process and will not be repeated.

[0041] To ensure reliable back-and-forth movement of the concrete placing machine 2 along both ends of the guide rail frame 13, a key feature of this embodiment is that when the guide pin 35 leaves the guide groove 5, the locking mechanism 6 locks the first pump pipe 31. At this time, the movement trajectory of the guide pin 35 transitions from a straight line to a curve with the outlet 51 as the turning point. When the guide pin 35 is inside the guide groove 5, the locking mechanism 6 releases the first pump pipe 31, allowing the concrete placing machine 2 to move smoothly and orderly back and forth between both ends of the guide rail frame 13. This prevents the locking mechanism 6 from failing to release the first pump pipe 31, which could force the concrete placing machine 2 to move the first pump pipe 31 and damage the concrete placing device. Through the above settings, the cooperation of the guiding mechanism and the locking mechanism enables the switching of the swing fulcrum of the multi-segment pump pipe 3 during the forward and reset process. This fixes the movement trajectory of the guide pin, allowing the multi-segment pump pipe 3 to swing and deform in an orderly and reliable manner within the constrained space between the two frames, thus enabling the concrete placing device to smoothly complete the grouting work.

[0042] Furthermore, the locking mechanism 6 includes an electric push rod 61, a stop bracket 62, and a baffle 63. The cylinder end of the electric push rod 61 is hinged to the upper end of the first frame 11. The stop bracket 62 is fixed to the first frame 11 and located below the electric push rod 61. One end of the baffle 63 is hinged to the free end of the stop bracket 62, and the other end of the baffle 63 is provided with an arc-shaped groove 631. The rod end of the electric push rod 61 is slidably connected to the arc-shaped groove 631 through a pin 64. The pushing action of the electric push rod 61 drives the rotation of the baffle 63, thereby realizing the locking and unlocking actions.

[0043] The concrete placing boom 2 also includes a base 21, an upper base 22, and a distributing head assembly 23. The distributing head assembly 23 is located on top of the upper base 22 and includes a distributing pipe 231 and a distributing head swing body. The distributing pipe 231 is used to output concrete and is connected to the distributing head swing body, which drives it to swing at a certain angle. The upper base 22 is vertically connected to the top of the base 21 via a lifting mechanism. The lifting mechanism has a lifting driver 24 fixed to the base 21. In this embodiment, the lifting driver 24 is preferably a hydraulic cylinder, with the bottom of the cylinder body fixedly connected to the bottom of the upper base 22 and the end of its piston rod fixedly connected to the top of the base 21. When the hydraulic cylinder is working, the extension and retraction of its piston rod will drive the upper base 22, together with the distributing head assembly 23 and the multi-segment pump pipe 3, to move up and down, thereby driving the distributing pipe 231 to move up and down to adjust its position in the vertical direction.

[0044] To ensure the smoothness and accuracy of the lifting process and prevent skewing, guide rings 221 are fixedly connected to the four corners of the upper seat 22. Correspondingly, four guide rods 212 arranged vertically are fixedly connected to the seat 21. Each guide ring 221 is movably sleeved on one guide rod 212, forming a sliding pair, providing reliable guidance for the lifting of the upper seat 22. As a further optimization of this embodiment, return springs 222 are sleeved on at least two guide rods 212. The lower end of the return spring 222 abuts against the top surface of the guide ring 221, and the upper end of the return spring 222 abuts against the limiting plate 2121 fixed to the top of the guide rod 212. This return spring 222 not only provides cushioning for the lifting movement, but also assists the upper seat 22 in returning to its original position when needed, enhancing the stability of the system. A retractable dust cover 223 is connected to the outside of the return spring 222. The upper end of the dust cover 223 is connected to the limiting plate 2121 at the top of the guide rod 212, and the lower end is connected to the top surface of the guide ring 221. The dust cover 223 can extend and retract synchronously with the compression and extension of the return spring 222, which can effectively isolate dust and concrete slurry in the tunnel, prevent them from adhering to the surface of the return spring 222 and the guide rod 212, ensure the smooth operation of the return spring 222 and extend its service life.

[0045] In this embodiment, the specific structure of the material distribution head oscillating body includes an elbow 232, a rotating frame 233, a support frame 234, and a rotating reducer assembly 235. The rotating frame 233 and the support frame 234 are fixed to the top surface of the upper seat 22 at a certain distance from each other. One end of the elbow 232 is rotatably connected to the rotating frame 233 through rotating components such as bearings, and is rotatably connected to the discharge end of the multi-segment pump pipe 3 (the discharge end of the fourth pump pipe 34) through a hinged pipe joint. The other end of the elbow 232 is connected and fixed to the lower port of the material distribution pipe 231 through a pipe clamp 236. Concrete enters the elbow 232 and the material distribution pipe 231 of the concrete placing boom sequentially through the multi-segment pump pipe 3. A reinforcing seat 237 is wrapped and fixed to the outside of the bend of the elbow 232. The side of the reinforcing seat 237 is rotatably connected to the support frame 234 through a support shaft 238. The rotary reducer assembly 235 is fixedly connected to the rotary frame 233, and the rotary reducer assembly 235 is driven to one end of the elbow 232. During operation, the rotary reducer assembly 235 drives the elbow 232 to rotate around the central axis of the rotary frame 233, which in turn drives the distribution pipe 231 to swing together, conveying concrete to each grouting port.

[0046] As an auxiliary improvement to the lifting drive mechanism, two support plates 224 can be fixedly mounted at intervals on the top surface of the upper seat 22. Two parallel synchronous shafts 225 are rotatably connected between the two support plates 224 via bearing seats. The ends of the two synchronous shafts 225 on the same side are connected by a synchronous transmission pair 226, thereby achieving synchronous rotation of the two shafts. In this embodiment, the synchronous transmission pair 226 is preferably a chain drive mechanism, i.e., sprockets are installed at the ends of the two shafts and connected by chains. Gears 227 are fixedly mounted at both ends of the two synchronous shafts 225. On the seat 21, corresponding to the position of each gear 227, a rack 213 arranged vertically is fixedly connected via a bracket 211. Each gear 227 meshes with the corresponding rack 213. When the lifting drive 24 pushes the upper seat 22 to rise or fall, the gears 227 roll along the racks 213, and through the linkage of the synchronous shafts 225 and the synchronous transmission pair 226, ensure that the four corners of the upper seat 22 rise and fall synchronously, making the operation more stable and reliable.

[0047] To ensure a good seal when the distribution pipe 231 connects to the grouting port on the top of the lining trolley and prevent concrete grout leakage, a top-pressure connector 239 is connected to the top of the distribution pipe 231. The outer peripheral wall of the top-pressure connector 239 has an annular groove, within which a sealing ring 2391 is installed. When the top-pressure connector 239 is pressed against the grouting port under power, the sealing ring 2391 is compressed, forming an effective seal.

[0048] In addition, to maintain a clean working environment and prevent concrete dripping from the distribution pipe 231 from contaminating the equipment and tunnel, waste collection hoppers 2311 are fixedly installed on both sides of the lower end of the distribution pipe 231. These collection hoppers can effectively collect dripping residual concrete.

[0049] To enable the entire device to move along the tunnel axis, rollers 214 are connected to both sides of the base 21 via brackets, forming a movable vehicle structure. Furthermore, a travel drive mechanism 25 is also provided on the base 21. This travel drive mechanism 25 has a travel reduction motor 251. A drive sprocket 252 is fixedly connected to the output shaft of the travel reduction motor 251. Auxiliary sprockets 253 are rotatably connected to both sides below the drive sprocket 252. A guide chain (not shown in the figure) is fixedly connected to the guide rail frame 13 along its length. The guide chain on the guide rail frame 13 passes sequentially through one auxiliary sprocket 253, the drive sprocket 252, and another auxiliary sprocket 253, forming engagement and tension. During operation, the travel reduction motor 251 starts, driving the drive sprocket 252 to rotate. Utilizing the engagement between the sprocket and the chain, the entire fabric placing machine 2 is driven to move along the fixed guide chain, thereby achieving precise positioning.

[0050] For the grouting port on the top of the lining trolley, the placing boom 2 is first moved below the target grouting port by the travel drive mechanism 25. Then, the lifting drive 24 is activated, pushing the upper seat 22 upward, so that the top pressure joint 239 at the top of the distribution pipe 231 is roughly aligned with the grouting port. Next, the rotary reducer assembly 235 operates, driving the distribution head swing body to make fine adjustments to the distribution pipe 231 until the top pressure joint 239 is precisely aligned and presses against the grouting port. At this time, the sealing ring 2391 is deformed under pressure to achieve a seal. Finally, the concrete is pumped out through the conveying system via the elbow 232 and the distribution pipe 231 to complete the pouring. For the grouting port on the side of the lining trolley, the placing boom 2 moves to the position of the target grouting port, the rotary reducer assembly 235 operates, driving the distribution head swing body to tilt the distribution pipe 231 towards the position of the target grouting port and pour concrete.

[0051] The specific concrete placement method of the first embodiment: Let the end of the track away from the guide groove 5 outlet 51 be the near end and the other end be the far end. As the concrete placement machine 2 pushes the multi-section pump pipe 3 to move along the guide rail frame 13 from the near end 131 to the far end 132, concrete is poured into the grouting port on the lining trolley in sequence. Among them, the fourth pump pipe 34 does not swing during the movement of the cloth placing machine 2; let the central axis of the pump pipe rotation assembly 4 be axis A, the hinge axis of the first pump pipe 31 and the second pump pipe 32 be axis B, and the hinge axis of the second pump pipe 32 and the third pump pipe 33 be axis C. During the process S1 of the placing boom 2 moving from the near end 131 to the far end 132 along the guide rail frame 13, the operation process of the multi-section pump pipe 3 is as follows: As the guide pin 35 of the multi-segment pump pipe 3 moves forward along the guide groove 5, the third pump pipe 33 keeps moving forward without swinging, the first pump pipe 31 swings towards the locking mechanism 6 with the A-axis as the pivot point, and the second pump pipe 32 moves between the first pump pipe 31 and the third pump pipe 33. When the guide pin 35 of the multi-segment pump pipe 3 disengages from the outlet 51 of the guide groove 5, the first pump pipe 31 simultaneously abuts against the first frame 11. At this time, the locking mechanism 6 activates to limit the first pump pipe 31. The first pump pipe 31 is approximately parallel to the first frame 11, and the movement trajectory of the guide pin 35 changes from a straight line to a curve. Then, as the concrete placing machine 2 continues to advance to the far end 132 of the guide rail frame 13, the first pump pipe 31 is restricted and remains stationary. Driven by the concrete placing machine 2, the second pump pipe 32 swings towards the far end 132 of the guide rail frame 13 with the B axis as the pivot point, and the third pump pipe 33 swings towards the far end 132 of the guide rail frame 13 with the C axis as the pivot point, until the concrete placing machine 2 reaches the far end 132 of the guide rail frame 13, and the concrete placing machine reaches the final grouting port position to pour concrete. In the process S2, where the placing machine 2 pulls the multi-segment pump pipe 3 to move and reset along the guide rail frame 13 from the far end 132 to the near end 131, the action of the multi-segment pump pipe 3 is the reverse process of the multi-segment pump pipe action process in the above process S1.

[0052] The status of the guide pin 35 entering and exiting the guide slot 51 is identified by a position sensor.

[0053] After the concrete placement is completed, the multi-segment pump pipes and the pipes on the concrete placing machine need to be flushed to prevent concrete residue from remaining inside the pipes. Since the multi-segment pump pipes in this invention are relatively long and have bends, a cleaning method from existing technology can be used: First, a cleaning ball is placed into the inlet end of the multi-segment pump pipe. Then, a high-pressure water source is connected to the inlet end of the multi-segment pump pipe. The high-pressure water flow enters the multi-segment pump pipe, pushing the cleaning ball forward until it is discharged from the distribution pipe of the concrete placing machine. Then, an air compressor is connected to the inlet end of the multi-segment pump pipe, using high-pressure air to thoroughly blow out any remaining water and slurry from the pipes.

[0054] Figure 12-13 The second embodiment of the present invention is shown. The main difference between this embodiment and the first embodiment lies in the structural design of the multi-segment pump pipe and the guide groove. Other structures are largely the same as the first embodiment and will not be described in detail here. In this embodiment, the pump pipe rotary assembly 4 is located between the two guide rails at the end of the guide rail frame 13. The pump pipe rotary assembly 4 is located at the middle position of the connection between the two guide rails at the end of the guide rail frame 13. The anchoring end 301 is movably sleeved on the pump pipe rotary assembly 4. The multi-segment pump pipe 3 is connected sequentially by a movable rotating connecting pipe to form an unfoldable structure that can present a wavy spatial curve. A set of hinged pipe joints at the crest or trough position connects the pump pipe segments together sequentially. The anchoring end 301 is connected to the discharge end of the concrete pump truck, and the driving end 302 is rotatably connected to the material distribution head assembly 23 of the placing boom 2.

[0055] A guide groove 5 is fixed between a pair of guide rails 131 located below the guide rail frame 13, and is arranged along its length direction. At least one section of the multi-section pump pipe is fixedly connected to a guide device 37, which is connected to the guide groove 5 and can slide back and forth in the guide groove 5 to support the multi-section pump pipe 3. When the fabric placing machine 2 is driven, it changes the included angle between adjacent pipe sections, so that the chain structure as a whole can continuously and reversibly switch between the folded and contracted state and the stretched and unfolded state. The multi-section pump pipe is limited to deformation and displacement within the space between the first frame and the second frame.

[0056] The guide device 37 is fixedly connected to the pump pipe. The guide device 37 has a guide rod and a guide wheel. One end of the guide rod is fixed to the pump pipe by welding or screwing, and the other end is connected to the guide wheel. The guide wheel is connected to the guide groove 5. When the multi-section pump pipe 3 moves, the guide wheel slides in the guide groove 5 to support the weight of the multi-section pump pipe 3. In this embodiment, the guide device is fixed at the midpoint of one of the pump pipe sections. There are various ways to fix it (such as welding, threaded connection, interference fit, snap-fit, etc.).

[0057] The structure of the fabric placing machine in this embodiment is basically the same as that in the first embodiment, and will not be described again here.

[0058] Compared to the first embodiment, this embodiment uses more movable connecting pipes for the same travel distance with the concrete placing machine, making it more suitable for secondary lining trolleys with relatively short lengths.

[0059] The specific embodiments of the present invention have been described above. However, those skilled in the art should understand that this is merely an example. Those skilled in the art can make various changes or modifications to this embodiment without departing from the principles and essence of the present invention, but all such changes and modifications fall within the protection scope of the present invention.

Claims

1. A secondary lining material placement device, characterized in that: include: Two frames set at relative intervals; The track is laid between the two frames and extends along their length. The fabric laying machine is movably mounted on the track; A multi-section pump pipe is formed by connecting multiple rigid pipe sections in series via movable connecting pipes, creating an internally connected and flexible delivery pipeline; among which, The first end of the multi-segment pump pipe is the anchoring end, and its spatial position is fixed relative to the two frames by a certain point constraint. The second end of the multi-segment pump pipe is the drive end, which is connected to the fabric placing machine; The fabric placing machine is configured such that when it is driven to reciprocate along the track, it pushes or pulls the multi-segment pump pipes through the drive end, forcing each of the movable connecting pipes to rotate, thereby enabling the multi-segment pump pipes to form and present a spatial curve shape with at least one bending portion within the constrained space between the two frames, where the shape continuously changes between a stretched state and a compressed state.

2. The secondary lining material placement device according to claim 1, characterized in that: The movable connecting pipe is a hinged pipe joint. The multi-segment pump pipe is composed of four rigid pipe segments connected in series through three hinged pipe joints, namely the first pump pipe, the second pump pipe, the third pump pipe and the fourth pump pipe. The inlet end of the first pump pipe constitutes the anchoring end, and the outlet end of the fourth pump pipe constitutes the driving end. The two frames are the first frame and the second frame, and the fixed-point constraint is achieved by the pump pipe rotation assembly, which is located in the middle section of the first frame. The feed end of the first pump pipe is rotatably connected to the pump pipe rotation assembly. The fabric device also includes a limiting mechanism, which has a guiding mechanism and a locking mechanism that work together. The guiding mechanism consists of a guide groove and a guide pin; The guide groove is fixed to the inner side of the second frame and extends along its length. The end of the guide groove near the pump pipe rotary assembly is the outlet. A guide pin is fixed to a hinged pipe joint connecting the third pump pipe and the second pump pipe. The guide pin and the guide groove form a sliding guide fit. The guide pin can be disengaged from or enter the guide groove through the outlet. A locking mechanism, located on the first frame and on one side of the outlet, is used to lock or release the first pump tube. When the guide pin is located in the guide groove, the locking mechanism releases the first pump tube; when the guide pin leaves the outlet, the locking mechanism locks the first pump tube. When the fabric placing machine is driven, the guide pin moves synchronously with the fabric placing machine, slides along the guide groove and continues to slide after disengaging from the outlet until the fabric placing machine reaches the end of the track; the movement trajectory of the guide pin is fixed, and the multi-segment pump pipe moves back and forth between the two ends of the track along this trajectory.

3. The secondary lining material placement device according to claim 2, characterized in that: The movement trajectory of the guide pin transitions from a straight line to a curve with the outlet as the turning point.

4. The secondary lining material placement device according to claim 2, characterized in that: The hinged pipe joint has a first bend and a second bend; the first bend and the second bend each have an arc-shaped pipe and two ports located at both ends of the arc-shaped pipe; the axes of the two ports are perpendicular to each other; one port of the first bend and one port of the second bend are rotatably connected by a hinge shaft, and the other ports of the first bend and the second bend are respectively used to connect two adjacent rigid pipe sections.

5. The secondary lining material placement device according to claim 2, characterized in that: The guide pin is disposed on the outer wall of the hinged pipe joint connecting the third pump pipe and the second pump pipe, and its position corresponds to the radial region of the hinged end face of the hinged pipe joint, and extends along the hinge axis of the hinged pipe joint.

6. The secondary lining material placement device according to claim 2, characterized in that: When the fabric placing machine is at the end of the track away from the outlet, the included angle between the center lines of the first pump pipe and the second pump pipe is limited to less than 180 degrees and greater than 90 degrees.

7. The secondary lining material placement device according to claim 2, characterized in that: The outlet is configured in a flared shape.

8. The secondary lining material placement device according to claim 2, characterized in that: At least the straight-line distance between the two ends of the first pump pipe, the second pump pipe, and the third pump pipe is less than the interval distance between the two frames.

9. The secondary lining material placement device according to claim 2, characterized in that: When the locking mechanism locks the first pump tube, an arc formed with the center of the hinge shaft between the first and second pump tubes as the center and the distance from the center of the guide pin to the center of the hinge shaft as the radius is set tangent to the center line of the outlet.

10. The secondary lining material placement device according to claim 2, characterized in that: The fourth pump pipe is fixed to the fabric placing machine.

11. The secondary lining material placement device according to claim 2, characterized in that: The locking mechanism has an electric push rod, a stop frame, and a baffle plate; the cylinder end of the electric push rod is hinged to the upper end of the first frame, the stop frame is fixed on the first frame and located below the electric push rod, one end of the baffle plate is hinged to the free end of the stop frame, and the other end of the baffle plate is provided with an arc groove, and the rod end of the electric push rod is slidably connected to the arc groove through a pin.

12. The secondary lining material placement device according to claim 1, characterized in that: In the multiple pump pipe sections, at least one section has a straight-line distance between its two ends that is less than the interval between the two frames.

13. The apparatus according to claim 1, characterized in that: The movable connecting pipe has a first bend and a second bend; the first bend and the second bend each have an arc-shaped pipe and two ports located at both ends of the arc-shaped pipe; the axes of the two ports are perpendicular to each other; one port of the first bend and one port of the second bend are rotatably connected.

14. The secondary lining material placement device according to claim 1, characterized in that: The two frames are the first frame and the second frame, respectively; The track is a guide rail frame consisting of a pair of parallel guide rails fixed to the first frame and the second frame; The movable connecting pipe is a hinged pipe joint, and the multiple pump pipes are connected in series through this hinged pipe joint to form an unfoldable structure that can present a wavy spatial curve. The fixed-point constraint is achieved by a pump pipe rotary assembly, which is located at the end of the guide rail frame; the anchoring end is movably sleeved on the pump pipe rotary assembly; When the fabric placing machine is driven, the included angle between adjacent pipe sections is changed.

15. The secondary lining material placement device according to claim 14, characterized in that: A pump pipe support groove is fixedly connected between a pair of guide rails located below the guide rail frame, and at least one section of the multiple pump pipes is fixedly connected to a support device, which is connected to the pump pipe support groove and can slide back and forth in the support groove.

16. The secondary lining material placement device according to claim 14, characterized in that: The support device is fixed on the outer peripheral surface of at least one pump pipe in the middle of its length direction.

17. The secondary lining material placement device according to claim 14, characterized in that: The straight-line distance between the two ends of at least one of the multi-segment pump pipes is less than the interval between the two frames.

18. The secondary lining material placement device according to claim 1 or 2, characterized in that: The track is a guide rail frame consisting of a pair of guide rails that are relatively spaced apart and parallel to each other between the first frame and the second frame.

19. The secondary lining material placement device according to claim 1 or 2, characterized in that: The movable connecting pipe is configured such that no two pump pipes interfere with each other during the formation of the spatial curve shape.

20. A secondary lining material placement device according to any one of claims 1, 2, or 14, characterized in that: The concrete placing boom has a distribution head assembly for distributing concrete output, and the drive end is connected to the distribution head assembly.

21. A secondary lining material placement device according to any one of claims 20, characterized in that: The fabric laying machine also has a base and an upper seat; Rollers are connected to both sides of the base to form a movable vehicle structure; the rollers on both sides of the base are rotatably connected to the guide grooves on both sides of the guide rail frame; the base is provided with a walking drive mechanism that drives the entire fabric placing machine to move on the guide rail frame. The material distribution head assembly is located on the top of the upper seat. The material distribution head assembly has a material distribution pipe and a material distribution head swing body. The material distribution pipe is connected to the material distribution head swing body, and the material distribution head swing body drives the material distribution pipe to swing. The upper seat is vertically connected to the top of the base body, and the upper seat is driven to rise and fall by a lifting driver fixed on the base body, thereby driving the material distribution pipe to rise and fall.

22. A secondary lining material placement device according to claim 21, characterized in that: The material distribution head swing body includes an elbow, a rotating frame, a support frame, and a rotating reducer assembly; The slewing frame and the support frame are fixed at a relative interval on the top surface of the upper seat. One end of the elbow is rotatably connected to the slewing frame and rotatably connected to the discharge end of the material distribution pipe assembly through a movable sealing joint. The other end of the elbow is connected and fixed to the lower port of the material distribution pipe through a pipe clamp. A reinforcing seat is fixed to the outside of the bend of the elbow, and the side of the reinforcing seat is rotatably connected to the support frame via a support shaft. The rotary reducer assembly is fixedly connected to the rotary frame and driven to one end of the elbow. The rotary reducer assembly drives the elbow to rotate, thereby causing the material distribution pipe to swing.

23. The method for placing material in a secondary lining material placing device according to claim 2, characterized in that: Let the end of the track away from the guide slot outlet be the near end and the other end be the far end. When the concrete placing machine is driven and pushes the multi-section pump pipe to move along the track from the near end to the far end, the concrete placing machine will sequentially pour concrete into the grouting port on the lining trolley. Among them, the fourth pump pipe does not swing during the movement of the concrete placing machine; let the central axis of the pump pipe rotation assembly be axis A, the hinge axis of the first and second pump pipes be axis B, and the hinge axis of the second and third pump pipes be axis C. During the process S1 of the concrete placing boom moving from the near end to the far end of the track, the operation of the multi-section pump pipe is as follows: As the guide pin moves forward along the guide groove, the third pump tube remains forward without swinging, the first pump tube swings towards the locking mechanism with the A-axis as the pivot point, and the second pump tube moves between the first and third pump tubes. When the guide pin disengages from the outlet of the guide groove, the first pump pipe abuts against the first frame, and the movement trajectory of the guide pin will transition from a straight line to a curve. At this time, the locking mechanism will activate to limit the first pump pipe. Then, as the placing machine continues to move forward to the far end of the track, the first pump pipe is restricted and remains stationary. Driven by the placing machine, the second pump pipe continues to swing towards the far end of the guide rail with the B axis as the pivot point, and the third pump pipe swings towards the end of the track with the C axis as the pivot point, until the placing machine reaches the end of the track. The movement trajectory of the guide pin is limited by the limiting mechanism. In the process S2, where the fabric placing machine pushes the multi-segment pump pipe to move and reset along the far end of the track to the near end, the action of the multi-segment pump pipe is the reverse process of the multi-segment pump pipe action process in the above process S1.

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