Multi-circle combined pipe and its connecting and locking device

Abstract

The application discloses a multi-circle combined pipe and a connecting and locking device thereof, relates to the technical field of pipe structure, and the connecting and locking device comprises a connecting shell and a connecting assembly. The connecting shell extends along the extension direction of a pipe jacking machine, and a limiting groove is formed between the connecting shell and the outer wall of the pipe jacking machine. The connecting assembly comprises a connecting rod, a plug-in rod, a connecting pivot, a locking piece and a telescopic driving structure. One end of the plug-in rod is in plug-in cooperation with the limiting groove, the other end of the plug-in rod extends out of the limiting groove and is hinged to the connecting rod through the connecting pivot. The end of the connecting rod away from the plug-in rod is hinged to the side wall of a pilot pipe through a hinge shaft. The telescopic driving structure is connected to the middle part of the connecting rod. The telescopic driving structure can drive the connecting rod to rotate around the hinge shaft. The locking piece can lock or unlock the connecting pivot, so that the plug-in rod can be fixed or rotated relative to the connecting rod. The multi-angle connection between the pilot pipe and the pipe jacking machine can be adapted, the adjustment efficiency of the connection posture of the pilot pipe and the pipe jacking machine is improved, and the connection precision and the connection reliability are improved.

Description

Technical Field

[0001] This invention relates to the field of pipe jacking technology, and in particular to a multi-circle combined pipe jacking system and its connection and locking device. Background Technology

[0002] With the continuous expansion of urban underground space development and utility tunnel layout needs, multi-channel and large-section layout scenarios are becoming increasingly common, placing higher demands on the flexible combination and efficient advancement of pipe jacking systems. Multi-circle combined pipe jacking, as an effective solution for large-section, modular tunnel construction, has advantages such as flexible combination and efficient utilization of passage space.

[0003] However, multi-circle combined pipe jacking is currently in the technological exploration and engineering pilot stage, and a mature connection mechanism is still lacking to meet the requirements of rapid assembly and multi-position adaptation between its pilot tube and pipe jacking machine. The following problems still exist in terms of connection devices: First, existing connection methods mostly rely on bolts, flanges, or rigid sleeves, making the connection process cumbersome and time-consuming, lacking efficient and rapid locking methods. At the same time, these devices lack posture adjustment and self-alignment capabilities under multi-angle arrangement conditions, often requiring repeated manual correction, which is not only inefficient but also prone to incorrect or misaligned connection postures, leading to insufficient construction accuracy. Second, some solutions attempt to directly add or modify connection structures to the pipe jacking machine to achieve docking, but because the pipe jacking machine itself is expensive and fixed, this method not only has high modification costs and a significant impact on the structural integrity of the equipment, but also cannot adapt to multi-position combined working conditions, lacks reusability, and has insufficient structural adaptability. Summary of the Invention

[0004] The main objective of this invention is to propose a multi-circle combined pipe jacking system and its connection and locking device, which aims to solve the technical problems in the prior art where the connection structure between the pilot pipe and the pipe jacking machine in multi-circle combined pipe jacking systems is cumbersome to operate, cannot adapt to the multi-position combination working conditions of the pilot pipe and the pipe jacking machine, and lacks reusability.

[0005] To achieve the above objectives, the present invention proposes a connection locking device for multi-circle combined jacking pipes, used for connecting and locking the pilot guide of the multi-circle combined jacking pipe to the jacking machine. The pilot guide has a radially inwardly recessed engagement groove, through which the pilot guide radially engages with the jacking machine. The connection locking device includes a connecting shell and a connecting assembly. The connecting shell extends along the extension direction of the jacking machine. The connecting shell includes an installation part and a limiting part that are interconnected. The installation part is connected to the outer wall of the jacking machine. The limiting part extends circumferentially away from the installation part along the jacking machine. The limiting part is spaced apart from the outer wall of the jacking machine. A limiting groove is formed between the limiting part and the outer wall of the pipe jacking machine; the connecting assembly includes a connecting rod, a plug rod, a connecting pivot, a locking member, and a telescopic drive structure. One end of the plug rod is plugged into the limiting groove, and the other end of the plug rod extends out of the limiting groove and is hinged to the connecting rod through the connecting pivot. The end of the connecting rod away from the plug rod is hinged to the side wall of the pilot tube through a hinge shaft. The telescopic drive structure is connected to the middle of the connecting rod and can drive the connecting rod to rotate around the hinge shaft. The locking member can lock or unlock the connecting pivot so that the plug rod can be fixed or rotated relative to the connecting rod.

[0006] In one embodiment, the telescopic drive structure includes a drive member and a telescopic rod. The drive member is mounted on the pilot guide. One end of the telescopic rod is connected to the drive member, and the other end of the telescopic rod is slidably connected to the middle of the connecting rod. The drive member can drive the telescopic rod to extend or retract in a direction closer to or further away from the connecting rod, so as to drive the connecting rod to rotate around the hinge axis.

[0007] In one embodiment, a groove is provided in the middle of the connecting rod, the groove extends along the extension direction of the connecting rod, and a pulley is provided at one end of the telescopic rod facing the connecting rod, which slides in the groove. The pulley can slide in the groove when the telescopic rod extends or retracts in a direction closer to or away from the connecting rod.

[0008] In one embodiment, a scale is provided on the connecting rod corresponding to the position of the slide groove.

[0009] In one embodiment, the driving component is a hydraulic cylinder, the piston rod of the hydraulic cylinder is connected to the telescopic rod, a pressure sensor for acquiring the air pressure inside the hydraulic cylinder is provided inside the hydraulic cylinder, and a stroke sensor for acquiring the extension and retraction stroke of the piston rod is provided on the piston rod.

[0010] In one embodiment, a hinge seat is installed on the side wall of the pilot tube, and a hinge hole is provided on the hinge seat for the hinge shaft to pass through. The connecting rod is hinged to the hinge seat through the hinge shaft, and an angle scale is engraved on the hinge seat.

[0011] In one embodiment, the locking element is a retaining ring, and the connecting pivot has a circumferentially extending retaining groove. The retaining ring can be inserted into the retaining groove to lock the connecting pivot, and the retaining ring can be removed from the retaining groove to unlock the connecting pivot.

[0012] In one embodiment, a photoelectric sensor is installed on the outer wall of the pipe jacking machine. The photoelectric sensor is located in the limiting groove. A light-shielding plate or a reflective surface is provided on the side of the insertion rod facing the pipe jacking machine. The photoelectric sensor can sense the light-shielding plate or the reflective surface when the insertion rod is inserted into a preset position in the limiting groove.

[0013] In one embodiment, the mounting part is fitted to the outer wall of the pipe jacking machine, and two limiting parts are respectively connected to both ends of the mounting part. Two limiting grooves are respectively formed between the two limiting parts and the outer wall of the pipe jacking machine. The connection locking device includes two connecting components, which are respectively arranged corresponding to the two limiting parts. Two plug-in rods in the two connecting components are respectively plugged into the two limiting grooves.

[0014] The present invention also proposes a multi-circle combined pipe jacking method, including a pilot pipe, a pipe jacking machine and the above-mentioned connection and locking device, wherein the pilot pipe and the pipe jacking machine are connected and locked through the connection and locking device.

[0015] The connection locking device and multi-circle combined jacking pipe proposed in this invention have the following advantages:

[0016] First, it can achieve flexible locking and unlocking between the pilot tube and the jacking machine, which facilitates rapid adjustment of the connection posture between the pilot tube and the jacking machine, effectively improving the connection efficiency and posture adjustment efficiency between the pilot tube and the jacking machine.

[0017] Second, it allows the pilot pipe and the jacking machine to be freely combined from multiple angles to form a multi-circle combined jacking pipe, which can adapt to the multi-angle connection between the pilot pipe and the jacking machine, ensure the connection strength and stability between the pilot pipe and the jacking machine, realize reliable force transmission between the jacking machine and the pilot pipe, and enable the multi-circle combined jacking pipe formed by the combination of the pilot pipe and the jacking machine to adapt to jacking construction under complex working conditions and ensure construction accuracy.

[0018] Third, the connecting locking device is set between the outer wall of the pilot tube and the outer wall of the jacking machine, which eliminates the need to modify the internal structure of the pilot tube and the jacking machine, and can reduce the impact on the structural integrity of the pilot tube and the jacking machine.

[0019] Fourth, by using photoelectric sensors installed on the outer wall of the pipe jacking machine in conjunction with light-shielding plates or reflective surfaces installed on the insertion rod, the detection signals of the photoelectric sensors can determine the insertion position of the insertion rod into the limiting groove, thereby measuring the degree of docking between the insertion rod and the limiting groove. This allows for precise acquisition of the connection position and attitude between the pilot tube and the pipe jacking machine, thus avoiding the problem of loose connection between the pilot tube and the pipe jacking machine due to improper insertion of the insertion rod. This effectively improves the connection accuracy between the pilot tube and the pipe jacking machine and enhances the connection reliability of the connection locking device. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a structure of an embodiment of the multi-circle combined jacking pipe provided by the present invention;

[0022] Figure 2 A cross-sectional schematic diagram of an embodiment of the connection and locking device for multi-circle combined jacking pipes provided by the present invention;

[0023] Figure 3 This is a detailed cross-sectional schematic diagram of an embodiment of the connection and locking device for multi-circle combined jacking pipes provided by the present invention.

[0024] Explanation of icon numbers:

[0025] 100. Connecting locking device; 10. Connecting shell; 11. Mounting part; 12. Limiting part; 121. Limiting groove; 20. Connecting assembly; 21. Connecting rod; 211. Slide groove; 212. Scale; 22. Insertion rod; 23. Connecting pivot; 24. Locking element; 25. Telescopic drive structure; 251. Hydraulic cylinder; 252. Telescopic rod; 2521. Pulley; 26. Hinge shaft; 27. Hinge seat; 271. Angle scale; 200. Pilot tube; 210. Engaging groove; 300. Pipe jacking machine.

[0026] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0029] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0030] Currently, multi-circle combined pipe jacking is still in the technology exploration and engineering pilot stage. A mature connection mechanism is lacking to meet the requirements for rapid assembly and multi-positional adaptation between the pilot tube and the pipe jacking machine. The following problems still exist regarding connection devices: First, existing connection methods mostly rely on bolts, flanges, or rigid sleeves. The connection process is cumbersome and time-consuming, lacking efficient and rapid locking methods. Furthermore, these devices lack posture adjustment and self-alignment capabilities under multi-angle arrangement conditions, often requiring repeated manual correction, which is not only inefficient but also prone to incomplete or misaligned connections, leading to insufficient construction accuracy. Second, some solutions attempt to directly add or modify connection structures on the pipe jacking machine to achieve docking. However, due to the high cost and fixed nature of the pipe jacking machine, this method not only has high modification costs and a significant impact on the structural integrity of the equipment but also cannot adapt to multi-positional combined working conditions, lacking reusability and often leading to rework, increasing construction time and costs, demonstrating insufficient structural adaptability.

[0031] This invention proposes a connection locking device for multi-circle combined jacking pipes, used for connection locking between the pilot guide 200 and the jacking machine 300 of the multi-circle combined jacking pipe. The pilot guide 200 has a radially inwardly recessed engagement groove 210, through which the pilot guide 200 radially engages with the jacking machine 300. The connection locking device 100 includes a connection shell 10 and a connection assembly 20. The connection shell 10 extends along the extension direction of the jacking machine 300. The connection shell 10 includes an installation part 11 and a limiting part 12 connected to each other. The installation part 11 is connected to the outer wall of the jacking machine 300. The limiting part 12 extends circumferentially away from the installation part 11 along the jacking machine 300. The limiting part 12 is spaced apart from the outer wall of the jacking machine 300. A limiting groove 121 is formed between the 12 and the outer wall of the pipe jacking machine 300; the connecting assembly 20 includes a connecting rod 21, a plug rod 22, a connecting pivot 23, a locking member 24, and a telescopic drive structure 25. One end of the plug rod 22 is plugged into the limiting groove 121, and the other end of the plug rod 22 extends out of the limiting groove 121 and is hinged to the connecting rod 21 through the connecting pivot 23. The end of the connecting rod 21 away from the plug rod 22 is hinged to the side wall of the pilot tube 200 through a hinge shaft 26. The telescopic drive structure 25 is connected to the middle of the connecting rod 21. The telescopic drive structure 25 can drive the connecting rod 21 to rotate around the hinge shaft 26. The locking member 24 can lock or unlock the connecting pivot 23 so that the plug rod 22 can be fixed or rotated relative to the connecting rod 21.

[0032] Please see Figures 1 to 3 The pilot tube 200 is a circular tube, and its wall has an inwardly recessed engagement groove 210 that fits against the side wall of the pipe jacking machine 300. When both the pilot tube 200 and the pipe jacking machine 300 extend axially and are arranged side by side, the pilot tube 200 can radially engage with the pipe jacking machine 300 through the engagement groove 210, and the engagement surfaces of the pilot tube 200 and the pipe jacking machine 300 form two joints on both sides radially. Figure 3 This is a schematic diagram of the joint between the pilot pipe 200 and the jacking machine 300 in cross-section. The connection locking device 100 proposed in this invention is set at the joint.

[0033] Please see Figure 3The connecting shell 10 of the locking device 100 extends a certain length along the axial direction of the pipe jacking machine 300, so that the mounting part 11 of the connecting shell 10 fits against the outer wall of the pipe jacking machine 300 in the circumferential direction, and a radially extending limiting groove 121 is formed between the limiting part 12 of the connecting shell 10 and the outer wall of the pipe jacking machine 300. The insertion rod 22 is inserted into the limiting groove 121, one end of the insertion rod 22 extends out of the limiting groove 121 and is hinged to the connecting rod 21 through the connecting pivot 23, and the end of the connecting rod 21 away from the insertion rod 22 is hinged to the side wall of the pilot guide 200 through the hinge shaft 26. The telescopic drive structure 25 is connected to the connecting rod 21 at the position between the two ends. The axial direction of the connecting pivot 23 is consistent with the axial direction of the pilot guide 200, so that the insertion rod 22 and the connecting rod 21 can... Figure 3 The cross-section shown indicates the oscillation. When the telescopic drive structure 25 extends or retracts, it drives the connecting rod 21 to rotate relative to the hinge shaft 26, while the insertion rod 22 is inserted into the insertion slot. The insertion rod 22 remains fixed relative to the pipe jacking machine 300, causing the connecting rod 21 and the insertion rod 22 to rotate relative to each other, thereby adjusting the connection posture of the pilot guide 200 and the pipe jacking machine 300. After the connection posture of the pilot guide 200 and the pipe jacking machine 300 is adjusted, the telescopic drive structure 25 stops extending or retracting, and the connecting pivot 23 is locked by the locking member 24, so that the connection direction of the insertion rod 22 and the connecting rod 21 remains relatively fixed. Thus, the pilot guide 200 and the pipe jacking machine 300 are fixedly connected by the connection locking device 100.

[0034] The connection locking device proposed in this invention connects a connecting shell 10 to the outer wall of a pipe jacking machine 300. A limiting groove 121 is formed between the limiting part 12 of the connecting shell 10 and the outer wall of the pipe jacking machine 300. A connecting rod 21 is hinged to the outer wall of the pilot guide 200, and a connecting rod 22 is hinged to the end of the connecting rod 21 away from the pilot guide 200 via a connecting pivot 23. The connecting rod 22 is inserted into the limiting groove 121. A telescopic drive structure 25 connected to the middle of the connecting rod 21 drives the connecting rod 21 to rotate around the hinge axis 26, causing the connecting rod 21 and the connecting rod 22 to rotate relative to each other via the connecting pivot 23. This adjusts the connection posture of the pilot guide 200 and the pipe jacking machine 300, allowing the pilot guide 200 and the pipe jacking machine 300 to freely combine from multiple angles to form a multi-circle combined pipe jacking. When the telescopic drive structure 25 stops driving the connecting rod 21, the connecting pivot 23 is locked by the locking member 24, keeping the insertion rod 22 and the connecting rod 21 relatively fixed. Through the insertion of the insertion rod 22 into the limiting groove 121, and the connection of the connecting rod 21 to the pilot guide 200 via the hinge shaft 26, the pilot guide 200 and the jacking machine 300 can maintain a fixed connection. The jacking machine 300 can transmit its own propulsion force to the pilot guide 200 through the connecting locking device 100, achieving reliable force transmission between the jacking machine 300 and the pilot guide 200. The connecting locking device 100 proposed in this invention enables flexible locking and unlocking between the pilot guide 200 and the jacking machine 300, facilitating rapid adjustment of the connection posture between the pilot guide 200 and the jacking machine 300, effectively improving the connection and adjustment efficiency between the pilot guide 200 and the jacking machine 300. Furthermore, the connecting locking device 100 can be reused by locking and unlocking the locking member 24. Furthermore, the connecting locking device 100 can accommodate multi-angle connections between the pilot pipe 200 and the pipe jacking machine 300, exhibiting good structural adaptability. This ensures the connection strength and stability between the pilot pipe 200 and the pipe jacking machine 300, enabling the multi-circle combined pipe jacking formed by the pilot pipe 200 and the pipe jacking machine 300 to adapt to jacking construction under complex working conditions and guarantee construction accuracy. The connecting locking device 100 is located between the outer wall of the pilot pipe 200 and the outer wall of the pipe jacking machine 300, eliminating the need for modifications to the internal structures of the pilot pipe 200 and the pipe jacking machine 300, thus minimizing the impact on the structural integrity of both.

[0035] It should be noted that the connection locking device 100 proposed in this invention is also applicable to the connection between two conventional jacking pipes that interlock in a multi-circle combined jacking pipe structure. The connection and locking process will not be described in detail here.

[0036] In one embodiment, the telescopic drive structure 25 includes a drive member and a telescopic rod 252. The drive member is mounted on the pilot guide 200. One end of the telescopic rod 252 is connected to the drive member, and the other end of the telescopic rod 252 is slidably connected to the middle of the connecting rod 21. The drive member can drive the telescopic rod 252 to extend or retract in a direction closer to or further away from the connecting rod 21, so as to drive the connecting rod 21 to rotate around the hinge axis 26.

[0037] Furthermore, the telescopic rod 252 is slidably connected to the middle of the connecting rod 21. When the drive unit is activated, it can drive the telescopic rod 252 to extend or retract in the direction of approaching or moving away from the connecting rod 21. When the telescopic rod 252 extends, it applies a pushing force to the connecting rod 21, causing the connecting rod 21 to rotate around the hinge axis 26. When the telescopic rod 252 shortens, it applies a pulling force to the connecting rod 21, causing the connecting rod 21 to rotate in the opposite direction around the hinge axis 26. When the telescopic rod 252 drives the connecting rod 21 to rotate around the hinge axis 26, the end of the telescopic rod 252 connected to the connecting rod 21 slides on the connecting rod 21. During the rotation of the connecting rod 21, the extension direction of the telescopic rod 252 remains perpendicular to the extension direction of the connecting rod 21, ensuring that the telescopic rod 252 always applies a pushing or pulling force to the connecting rod 21 in the direction of maximum force, thus achieving effective control of the connecting rod 21 by the telescopic rod 252.

[0038] In one embodiment, a groove 211 is provided in the middle of the connecting rod 21. The groove 211 extends along the extension direction of the connecting rod 21. A pulley 2521 is provided at one end of the telescopic rod 252 facing the connecting rod 21, which slides in the groove 211. The pulley 2521 can slide in the groove 211 when the telescopic rod 252 extends or retracts in the direction of approaching or away from the connecting rod 21.

[0039] Furthermore, when the drive unit drives the telescopic rod 252 to extend or retract, the pulley 2521 is constrained within the groove 211 and rolls along the extension direction of the groove 211. Through the cooperation between the pulley 2521 and the groove 211, the sliding friction between the end of the telescopic rod 252 and the connecting rod 21 is transformed into rolling friction, significantly reducing frictional resistance during movement and making the extension and retraction of the telescopic rod 252 smoother. Through the contact between the pulley 2521 and the groove wall of the groove 211, the telescopic rod 252 can apply a pushing or pulling force to the connecting rod 21. Simultaneously, the groove 211 precisely guides and limits the movement path of the pulley 2521, ensuring that the force applied by the telescopic rod 252 is always perpendicular to the connecting rod 21, guaranteeing efficient force transmission from the telescopic rod 252 to the connecting rod 21.

[0040] In one embodiment, a scale 212 is provided on the connecting rod 21 at a position corresponding to the slide groove 211.

[0041] Furthermore, the scale value on the ruler 212 can directly indicate the relative position of the pulley 2521 in the slide groove 211. The operator can read the sliding displacement of the telescopic rod 252 on the connecting rod 21 by observing the scale value corresponding to the pulley 2521 on the ruler 212, thereby indirectly obtaining the adjustment amount of the connecting rod 21 relative to the initial position, thus assisting in the attitude adjustment between the pilot tube 200 and the jacking machine 300.

[0042] In one embodiment, the driving component is a hydraulic cylinder 251, the piston rod of the hydraulic cylinder 251 is connected to the telescopic rod 252, a pressure sensor for acquiring the air pressure inside the hydraulic cylinder 251 is provided inside the hydraulic cylinder 251, and a stroke sensor for acquiring the extension and retraction stroke of the piston rod is provided on the piston rod.

[0043] Explained, the driving component uses a hydraulic cylinder 251 from the prior art. When the hydraulic cylinder 251 drives its piston rod to move the telescopic rod 252 in telescopic motion, the stroke sensor continuously detects the extension or retraction length of the piston rod. This length data directly corresponds to the displacement of the telescopic rod 252, and thus reflects the rotation angle of the connecting rod 21 through geometric relationships. In addition, the pressure sensor monitors the air pressure inside the hydraulic cylinder 251 in real time. The output thrust of the hydraulic cylinder 251 is obtained through the air pressure value inside the hydraulic cylinder 251, which indirectly reflects the load on the telescopic rod 252. This allows for monitoring of the connection posture adjustment status between the pilot tube 200 and the jacking machine 300, ensuring that the posture adjustment is controllable.

[0044] In one embodiment, a hinge seat 27 is installed on the side wall of the pilot tube 200. The hinge seat 27 has a hinge hole for the hinge shaft 26 to pass through. The connecting rod 21 is hinged to the hinge seat 27 through the hinge shaft 26. An angle scale 271 is engraved on the hinge seat 27.

[0045] Understandably, the connecting rod 21 is hinged to the hinge seat 27 via the hinge shaft 26, enabling the connecting rod 21 to rotate flexibly relative to the pilot tube 200. The angle scale 271 on the hinge seat 27 allows the operator to directly visually read the actual rotation angle of the connecting rod 21 relative to the hinge seat 27, thereby indirectly obtaining the connection posture between the pilot tube 200 and the jacking machine 300, ensuring the accuracy of posture control in multi-circle combined jacking.

[0046] In one embodiment, the locking member 24 is a retaining ring, and the connecting pivot 23 has a retaining groove extending in the circumferential direction. The retaining ring can be inserted into the retaining groove to lock the connecting pivot 23, and the retaining ring can be removed from the retaining groove to unlock the connecting pivot 23.

[0047] It can be explained that the retaining ring can achieve axial locking of the connecting pivot 23 by being embedded in the retaining groove; at the same time, the retaining ring can also be completely removed from the retaining groove to release the axial constraint on the connecting pivot 23. Locking and unlocking of the connecting pivot 23 is achieved by installing and removing the retaining ring, which is convenient to operate and can be reused, thus enabling the reusability of the connecting locking device 100. Both the retaining ring and the connecting pivot 23 adopt existing technology.

[0048] In one embodiment, a photoelectric sensor is installed on the outer wall of the pipe jacking machine 300. The photoelectric sensor is located in the limiting groove 121. A light-shielding plate or reflective surface is provided on the side of the plug rod 22 facing the pipe jacking machine 300. The photoelectric sensor can sense the light-shielding plate or reflective surface when the plug rod 22 is inserted into a preset position in the limiting groove 121.

[0049] It should be noted that the photoelectric sensor adopts a through-beam sensor or a reflective sensor as used in existing technology, and the plug rod 22 is provided with a light-shielding plate or a reflective surface corresponding to the type of photoelectric sensor. When a through-beam sensor is used, the transmitter and receiver of the sensor are respectively located on both sides of the limiting groove 121. When the light-shielding plate on the plug rod 22 reaches the preset position, it will block the light beam between the transmitter and the receiver, thereby triggering a signal. If a reflective sensor is used, the light beam emitted by the sensor is reflected back to the receiver by the reflective surface on the plug rod 22, and the sensing is achieved by detecting the change in light intensity. The detection signal of the photoelectric sensor can determine the insertion position of the plug rod 22 into the limiting groove 121, thereby avoiding the problem of loose connection between the pilot tube 200 and the jacking machine 300 due to improper insertion of the plug rod 22, and improving the connection reliability of the connection locking device 100.

[0050] In one embodiment, the action of locking and unlocking the connecting pivot 23 is driven by an electric drive unit. Both the electric drive unit and the photoelectric sensor are electrically connected to an external control device. When the external control device determines that the plug rod 22 is inserted into the designated position of the limiting groove 121 through the detection signal of the photoelectric sensor, it can control the electric drive unit to drive the circlip to lock the connecting pivot 23, thereby realizing the automatic locking of the connection locking device 100.

[0051] In one embodiment, the mounting part 11 is attached to the outer wall of the pipe jacking machine 300. Two limiting parts 12 are respectively connected to both ends of the mounting part 11. Two limiting grooves 121 are formed between the two limiting parts 12 and the outer wall of the pipe jacking machine 300. The connecting locking device 100 includes two connecting components 20. The two connecting components 20 are respectively provided corresponding to the two limiting parts 12. The two plug-in rods 22 in the two connecting components 20 are respectively plugged into the two limiting grooves 121.

[0052] Please see Figure 2The connecting shell 10 includes an installation part 11 and two limiting parts 12. The two limiting parts 12 respectively form two limiting grooves 121. The pilot tube 200 is inserted and engaged with the two limiting grooves 121 through two connecting components 20, thereby effectively improving the connection stability between the pilot tube 200 and the pipe jacking machine 300 and ensuring smooth force transmission between the pipe jacking machine 300 and the pilot tube 200.

[0053] The present invention also proposes a multi-circle combined jacking pipe, which includes a pilot guide pipe 200, a jacking machine 300, and a connecting and locking device 100. The specific structure of the connecting and locking device 100 is as described in the above embodiments. Since the multi-circle combined jacking pipe adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0054] The pilot pipe 200 and the pipe jacking machine 300 are connected and locked by a connecting and locking device 100, allowing the pilot pipe 200 and the pipe jacking machine 300 to be connected at multiple angles. The multi-circle combined pipe jacking formed by the pilot pipe 200 and the pipe jacking machine 300 can adapt to jacking construction under complex working conditions and ensure construction accuracy. The connecting and locking device 100 is set between the outer wall of the pilot pipe 200 and the outer wall of the pipe jacking machine 300, eliminating the need to modify the internal structure of the pilot pipe 200 and the pipe jacking machine 300, and reducing the impact on the structural integrity of the pilot pipe 200 and the pipe jacking machine 300.

[0055] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of protection of the present invention. Any equivalent structural transformations made based on the technical concept of the present invention and the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present invention.

Claims

1. A connection locking device for a multi-round combined pipe jacking, for connection locking between a pilot pipe and a pipe jacking machine of the multi-round combined pipe jacking, characterized in that, The pilot pipe is formed with a radially inwardly recessed snap groove, the pilot pipe is radially snapped with the pipe jacking machine through the snap groove, and the connecting and locking device comprises: A connecting shell extending along the extension direction of the pipe jacking machine, the connecting shell is connected with each other and comprises a mounting portion and a limiting portion, the mounting portion is connected to the outer wall of the pipe jacking machine, the limiting portion extends away from the mounting portion along the circumferential direction of the pipe jacking machine, the limiting portion is arranged in a spaced manner with the outer wall of the pipe jacking machine, and a limiting groove is formed between the limiting portion and the outer wall of the pipe jacking machine; A connecting assembly comprising a connecting rod, a plug-in rod, a connecting pivot, a locking piece and a telescopic driving structure, one end of the plug-in rod is plug-in matched with the limiting groove, the other end of the plug-in rod is extended out of the limiting groove and is hinged with the connecting rod through the connecting pivot, one end of the connecting rod away from the plug-in rod is hinged with the side wall of the pilot pipe through a hinge shaft, the telescopic driving structure is connected to the middle part of the connecting rod, the telescopic driving structure can drive the connecting rod to rotate around the hinge shaft, and the locking piece can lock or unlock the connecting pivot, so that the plug-in rod can be fixed or rotated relative to the connecting rod; The telescopic driving structure comprises a driving piece and a telescopic rod, the driving piece is mounted on the pilot pipe, one end of the telescopic rod is connected to the driving piece, and the other end of the telescopic rod is slidably connected to the middle part of the connecting rod, the driving piece can drive the telescopic rod to extend or retract towards the connecting rod, so as to drive the connecting rod to rotate around the hinge shaft; the middle part of the connecting rod is provided with a sliding groove extending along the extension direction of the connecting rod, and the end of the telescopic rod towards the connecting rod is provided with a pulley slidably matched with the sliding groove, and the pulley can slide in the sliding groove when the telescopic rod extends or retracts towards the connecting rod.

2. The connecting and locking device of the multi-round combined pipe jacking as claimed in claim 1, wherein, A scale is arranged on the connecting rod at a position corresponding to the sliding groove.

3. The connecting and locking device of the multi-round combined pipe jacking as claimed in claim 1, wherein, The driving piece is a hydraulic cylinder, a piston rod of the hydraulic cylinder is connected to the telescopic rod, a pressure sensor for acquiring the air pressure in the hydraulic cylinder is arranged in the hydraulic cylinder, and a stroke sensor for acquiring the telescopic stroke of the piston rod is arranged on the piston rod.

4. The connecting and locking device of a multi-round combined pipe jacking as claimed in any one of claims 1 to 3, characterized in that, A hinge seat is mounted on the side wall of the pilot pipe, a hinge hole for the hinge shaft to pass through is arranged in the hinge seat, the connecting rod is hinged to the hinge seat through the hinge shaft, and an angle scale is engraved on the hinge seat.

5. The connecting and locking device of a multi-round combined pipe jacking as claimed in any one of claims 1 to 3, characterized in that, The locking piece is a clasp spring, a clamping groove extending along the circumferential direction is arranged in the connecting pivot, the clasp spring can be embedded in the clamping groove to lock the connecting pivot, and the clasp spring can be detached from the clamping groove to unlock the connecting pivot.

6. The connecting and locking device of a multi-round combined pipe jacking as claimed in any one of claims 1 to 3, characterized in that, An optical sensor is mounted on the outer wall of the pipe jacking machine, the optical sensor is located in the limiting groove, a light-shielding sheet or a reflecting surface is arranged on the side of the plug-in rod towards the pipe jacking machine, and the optical sensor can sense the light-shielding sheet or the reflecting surface when the plug-in rod is plugged into the preset position in the limiting groove.

7. The connecting and locking device of a multi-round combined pipe jacking as claimed in any one of claims 1 to 3, characterized in that, The mounting part is attached to the outer wall of the pipe jacking machine, two ends of the mounting part are respectively connected with two limiting parts, two limiting grooves are respectively formed between the two limiting parts and the outer wall of the pipe jacking machine, the connecting and locking device comprises two connecting assemblies, the two connecting assemblies are respectively arranged in correspondence with the two limiting parts, and the two inserting rods in the two connecting assemblies are respectively inserted and matched with the two limiting grooves.

8. A multi-round combined pipe jacking, characterized in that, The connecting and locking device comprises a pilot pipe, a pipe jacking machine and the connecting and locking device according to any one of claims 1 to 7, and the pilot pipe and the pipe jacking machine are connected and locked through the connecting and locking device.

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