Joint device for pipe jacking machine

Abstract

The application discloses a joint device of a pipe jacking machine and relates to the technical field of pipe jacking machines. The joint device comprises a base frame, a connecting part, a plug-in joint, a driving structure, a stress monitoring assembly and a controller. The connecting part is installed on the base frame and is used for being connected with a pilot pipe. The driving structure is installed on the base frame. One end of the plug-in joint is an installation end, the installation end is connected with the driving structure, the plug-in joint is used for being inserted into a slot, and the driving structure is used for driving the plug-in joint to rotate around the installation end. The stress monitoring assembly is arranged on the outer periphery of the plug-in joint and is used for obtaining a stress value between the plug-in joint and the slot wall of the slot. The driving structure and the stress monitoring assembly are electrically connected with the controller. The joint device of the pipe jacking machine can avoid the stress concentration phenomenon of the position where the joint device is connected with the pipe jacking machine, thereby avoiding the risk of deformation and even damage of the pipe jacking machine and the joint device, prolonging the service life and improving the reliability.

Description

Technical Field

[0001] This invention relates to the field of pipe jacking machine technology, and in particular to a joint device for a pipe jacking machine. Background Technology

[0002] Currently, the pipe jacking method is used for tunnel construction. This typically involves first burying a pilot pipe in the ground, then connecting it to the pipe jacking machine, allowing the machine to advance along the pilot pipe. In pipe jacking construction, the pilot pipe not only serves a guiding role but also plays multiple roles, including controlling ground deformation, maintaining excavation face stability, and protecting existing structures. The pilot pipe is generally prefabricated in sections and jacked in stages. Adjacent sections are reliably connected to form a continuous guiding channel, providing a benchmark for the precise jacking of the subsequent pipe jacking machine.

[0003] Existing pipe jacking methods typically require the installation of a joint device on the pipe jacking machine, which is then connected to the pilot pipe to establish the connection between the two. Furthermore, these joint devices often employ rigid connection structures. During the pipe jacking process, due to the heterogeneity of geological conditions, uneven distribution of jacking resistance, the need for attitude adjustments, and complex changes in construction loads, stress concentration can easily occur at the connection point between the joint device and the pipe jacking machine. Especially under complex conditions such as traversing weak strata, water-rich strata, fault fracture zones, or adjacent existing buildings, the various stresses experienced at the joint often exceed design expectations, leading to a decrease in connection reliability.

[0004] Stress concentration problems can lead to plastic deformation and even fatigue damage to the front-end structure and joint devices of the pipe jacking machine. They can also cause abnormal changes in the machine's posture, reducing jacking accuracy and, in severe cases, causing the machine to jam or deviate from its design axis, resulting in engineering accidents. Furthermore, damage to the joint devices increases maintenance costs, prolongs the construction period, seriously affects project quality and construction safety, and may even threaten the safe operation of existing buildings. Summary of the Invention

[0005] The main objective of this invention is to provide a joint device for a pipe jacking machine, aiming to solve the technical problem that stress concentration easily occurs at the connection points between the joint device and the pipe jacking machine, leading to the risk of deformation or even damage to both the pipe jacking machine and the joint device. To achieve the above objectives, the present invention provides a connector for a pipe jacking machine, the connector being used to connect the pipe jacking machine to a pilot guide, wherein the pipe jacking machine has a slot formed thereon, and the connector comprising: Base frame; A connecting part is mounted on the base frame and is used to connect with the pilot tube; A connector and a drive structure are provided. The drive structure is mounted on the base frame. One end of the connector is a mounting end, which is connected to the drive structure. The connector is used to be inserted into the slot, and the drive structure is used to drive the connector to rotate around the mounting end. A stress monitoring component is disposed on the outer periphery of the connector, and the stress monitoring component is used to obtain the stress value between the connector and the groove wall of the slot; The controller, the drive structure, and the stress monitoring component are all electrically connected to the controller.

[0006] In one embodiment, the driving structure includes a first driving component and a second driving component. Both the first driving component and the second driving component are mounted on the base frame and are connected to the mounting end. The first driving component is used to drive the connector to rotate relative to the mounting end about a first direction, and the second driving component is used to drive the connector to rotate relative to the mounting end about a second direction. The first direction is perpendicular to the second direction.

[0007] In one embodiment, the mounting end is connected to a gear via a connecting shaft. The extension direction of the connecting shaft and the axial direction of the gear are arranged along the second direction. The first drive assembly includes two first drive seats spaced apart along the worm and along the first direction. Both first drive seats are mounted on the base frame. The worm is arranged between the first drive seats along the first direction, and its two ends are respectively connected to the two first drive seats. The gear meshes with the worm. Both first drive seats are used to drive the worm to rotate around the first direction, thereby driving the gear, the connecting shaft, and the connector to rotate around the second direction. The second drive assembly is movably connected to the connecting shaft. The connecting shaft can move relative to the second drive assembly along the first direction. The second drive assembly is used to drive the connecting shaft to rotate around the first direction, thereby driving the connector to rotate around the first direction.

[0008] In one embodiment, the second drive assembly includes a tilting frame and two second drive seats. The two second drive seats are spaced apart from each other on the base frame along a first direction, and the two first drive seats are disposed between the two second drive seats, with each first drive seat spaced apart from each second drive seat. The tilting frame includes a guide rail and two tilting arms. The guide rail extends along the first direction, and the connecting shaft is movably inserted through the guide rail along the first direction. The two tilting arms are respectively connected to the two ends of the guide rail along the first direction, and the two tilting arms are respectively connected to the two second drive seats. Each of the two second drive seats is used to drive the two tilting arms to rotate around the first direction, thereby causing the guide rail and the connecting shaft to rotate around the first direction.

[0009] In one embodiment, the slot includes a first insertion area and a second insertion area arranged sequentially from the outside to the inside. The inner diameter of the first insertion area is larger than the inner diameter of the second insertion area. A limiting step is formed between the first insertion area and the second insertion area. The connector includes a first insertion part and a second insertion part. The first insertion part matches the shape of the first insertion area and is inserted into it. The second insertion part matches the shape of the second insertion area and is inserted into it. An abutting step is formed between the first insertion part and the second insertion part. The abutting step and the limiting step abut into each other.

[0010] In one embodiment, an elastic buffer layer is stacked on the limiting step, and a pressure sensor is also provided on the side of the elastic buffer layer near the first insertion area. The pressure sensor is electrically connected to the controller of the connector device.

[0011] In one embodiment, a locking component is provided in the slot for locking or unlocking the connector inserted into the slot.

[0012] In one embodiment, the end of the connector opposite to the mounting end is the plug-in end, a first stress compensation component is provided on the bottom wall of the slot, and a second stress compensation component is provided on the side wall of the slot. The first stress compensation component is used to always abut against the plug-in end, and the second stress compensation component is used to always abut against the outer periphery of the connector.

[0013] In one embodiment, the first stress compensation component includes a plurality of first stress compensation structures. A plurality of first mounting grooves are formed by recessing the bottom groove wall in a direction away from the slot. The opening of the first mounting groove is located on the bottom groove wall. The number of the first stress compensation structures is the same as the number of the first mounting grooves and they correspond one-to-one. Each first stress compensation structure is installed in its corresponding first mounting groove. Each first stress compensation structure is used to extend out of the opening of its corresponding first mounting groove and always abut against the plug-in end. The second stress compensation component includes a plurality of second stress compensation structures spaced around the connector. The side wall has a plurality of second mounting slots corresponding to the positions of the plurality of second stress compensation structures. The opening of the second mounting slot is located on the side wall. The second stress compensation structure is installed in the corresponding second mounting slot. Each second stress compensation structure is used to ensure that the opening of its corresponding second mounting slot is always in contact with the outer periphery of the connector.

[0014] The technical solution of this invention connects the pipe jacking machine and the pilot pipe using a connector device, with the pipe jacking machine having a slot. The connecting part is mounted on the base frame for connection with the pilot pipe. The connector device can be installed on the pipe jacking machine by inserting the connector into the slot, making installation simple and convenient. The mounting end of the connector is connected to the drive structure, which is mounted on the base frame. The drive structure can drive the connector to rotate around the mounting end, changing the contact position between the connector end and the bottom trench wall, thereby adjusting the angle of the connector and thus the stress between the connector and the slot. A stress monitoring component can monitor the stress between the connector and the slot in real time. The controller is electrically connected to the drive structure and the stress monitoring component; the controller receives the stress value output by the stress monitoring component and can control the drive structure to rotate the connector based on the stress value, adjusting the contact state between the connector and the slot and reducing stress concentration. By rotating the connector under the drive structure, the contact position shifts circumferentially, avoiding localized sustained high stress and reducing stress concentration. The stress monitoring component detects the stress between the connector and the slot in real time. The controller controls the drive structure to rotate the connector based on the detection results, thereby automatically adjusting the stress state. This effectively avoids stress concentration between the connector and the slot, thus preventing deformation or even damage to the connector device and pipe jacking machine provided by this invention due to stress concentration. This further improves the reliability and durability of the connector device and pipe jacking machine.

[0015] Furthermore, by arranging multiple stress sensors around the periphery of the connector, a comprehensive monitoring network for stress distribution is formed, enabling real-time and accurate acquisition of stress values ​​between the connector and the slot wall. Based on the data from the stress sensors, the controller dynamically controls the drive structure, rotating the connector to adjust its contact with the slot, thus achieving proactive avoidance of stress concentration areas and load redistribution. This closed-loop control mechanism gives the connector device adaptability, automatically optimizing the stress state according to complex working conditions such as ground changes and fluctuations in jacking resistance, preventing structural deformation or fatigue damage caused by excessive stress.

[0016] Because stress concentration is effectively controlled, the risk of plastic deformation, fatigue cracks, and even fractures in the joint device and the front-end structure of the pipe jacking machine is significantly reduced. This avoids engineering accidents such as abnormal pipe jacking machine posture, jacking deviation, jamming, or deviation from the design axis caused by connection failure. At the same time, it reduces the frequency of downtime for maintenance due to equipment damage, lowers maintenance costs, shortens the construction cycle, and ensures the continuity and safety of tunnel construction. It is especially suitable for high-risk construction environments such as crossing soft strata, water-rich strata, fault fracture zones, or adjacent existing buildings. Attached Figure Description

[0017] 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.

[0018] Figure 1 A schematic diagram of the structure of a connector device for a pipe jacking machine according to an embodiment of the present invention, connected to the pipe jacking machine; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 for Figure 1 A magnified view of a section at point B in the middle; Figure 4 A schematic diagram of the drive structure in one embodiment of the joint device for a pipe jacking machine provided by the present invention; Figure 5 This is a schematic diagram of the connection structure between the pipe jacking machine and the pipe jacking machine and the pilot guide, according to an embodiment of the pipe jacking machine provided by the present invention.

[0019] Explanation of icon numbers: 100. Connector device; 10. Base frame; 20. Connecting part; 30. Plug-in connector; 31. Mounting end; 311. Gear; 312. Connecting shaft; 32. Plug-in end; 33. First plug-in part; 34. Second plug-in part; 40. Drive structure; 41. First drive assembly; 411. Worm gear; 412. First drive seat; 42. Second drive assembly; 421. Tilting frame; 4211. Guide rail; 4212. Tilting arm; 422. Second drive seat; 200. Pipe jacking machine; 201. Slot; 201 1. First insertion area; 2012. Second insertion area; 2013. Limiting step; 2014. Elastic buffer layer; 2015. Bottom groove wall; 2016. First mounting groove; 2017. Second mounting groove; 202. First stress compensation component; 203. First stress compensation structure; 2031. First driving component; 2032. First abutment block; 204. Second stress compensation component; 205. Second stress compensation structure; 2051. Second driving component; 2052. Second abutment block; 300. Pilot tube.

[0020] 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

[0021] 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.

[0022] 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.

[0023] 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.

[0024] This invention proposes a connector device 100 for a pipe jacking machine 200.

[0025] Please see Figures 1 to 5 In one embodiment of the present invention, the connector 100 is used to connect the pipe jacking machine 200 to the pilot pipe 300. The pipe jacking machine 200 has a slot 201 formed on it. The connector 100 includes: Base frame 10; Connecting part 20, the connecting part 20 is mounted on the base frame 10, and the connecting part 20 is used to connect with the pilot tube 300; The connector 30 and the drive structure 40 are mounted on the base frame 10. One end of the connector 30 is the mounting end 31, which is connected to the drive structure 40. The connector 30 is used to be inserted into the slot 201, and the drive structure 40 is used to drive the connector 30 to rotate around the mounting end 31. A stress monitoring component is disposed on the outer periphery of the connector 30. The stress monitoring component is used to obtain the stress value between the connector 30 and the groove wall of the slot 201. The controller, drive structure 40, and stress monitoring components are all electrically connected to the controller.

[0026] The technical solution of this invention connects the pipe jacking machine 200 and the pilot pipe 300 using a connector device 100. The pipe jacking machine 200 is provided with a slot 201. The connecting part 20 is installed on the base frame 10 and is used to connect with the pilot pipe 300. By inserting the connector 30 into the slot 201, the connector device 100 can be installed on the pipe jacking machine 200, which is simple and convenient. The mounting end 31 of the connector 30 is connected to the drive structure 40, which is installed on the base frame 10. The drive structure 40 can drive the connector 30 to rotate around the mounting end 31, so that the contact position between the plug end 32 and the bottom trench wall 2015 can change, thereby adjusting the angle of the connector 30 and thus adjusting the stress between the connector 30 and the slot 201. The stress monitoring component can monitor the stress between the connector 30 and the slot 201 in real time. The controller is electrically connected to the drive structure 40 and the stress monitoring component. The controller receives the stress value output by the stress monitoring component and controls the drive structure 40 to rotate the connector 30, thereby adjusting the contact state between the connector 30 and the slot 201 and reducing stress concentration. By rotating the connector 30 under the drive structure 40, the contact position shifts circumferentially, avoiding localized high stress and reducing stress concentration. The stress monitoring component detects the stress between the connector 30 and the slot 201 in real time, and the controller controls the drive structure 40 to rotate the connector 30 based on the detection results, realizing automatic adjustment of the stress state. This effectively avoids stress concentration between the connector 30 and the slot 201, thus preventing deformation or even damage to the connector device 100 and the pipe jacking machine 200 provided by this invention due to stress concentration, further improving the reliability and durability of the connector device 100 and the pipe jacking machine 200.

[0027] Furthermore, by arranging multiple stress sensors around the periphery of the connector 30, a comprehensive monitoring network for stress distribution is formed, enabling real-time and accurate acquisition of the stress value between the connector 30 and the slot wall of the slot 201. Based on the data fed back from the stress sensors, the controller dynamically controls the drive structure 40 to rotate the connector 30 to adjust its contact state with the slot 201, achieving active avoidance of stress concentration areas and load redistribution. This closed-loop control mechanism enables the connector device 100 to be adaptive, automatically optimizing the stress state according to complex working conditions such as changes in strata and fluctuations in jacking resistance, preventing structural deformation or fatigue damage caused by excessive stress.

[0028] Because stress concentration is effectively controlled, the risk of plastic deformation, fatigue cracks, or even fracture of the joint device 100 and the front-end structure of the pipe jacking machine 200 is significantly reduced. This avoids engineering accidents such as abnormal posture of the pipe jacking machine 200, jacking deviation, jamming, or deviation from the design axis caused by connection failure. At the same time, it reduces the frequency of downtime and maintenance due to equipment damage, lowers maintenance costs, shortens the construction cycle, and ensures the continuity and safety of tunnel construction. It is especially suitable for high-risk construction environments such as crossing soft strata, water-rich strata, fault fracture zones, or adjacent existing buildings.

[0029] Furthermore, the bottom wall 2015 of the slot 201 is conical, and the insertion end 32 of the connector 30 is conical, matching the shape of the conical bottom wall 2015 of the slot 201. During the jacking process of the pipe jacking machine 200, the insertion end 32 is inserted into the slot 201, and the conical surface abuts against the bottom wall 2015. The cooperation between the conical surface and the bottom wall 2015 provides guidance for the insertion of the connector 30. The stress monitoring component includes multiple stress sensors, which are spaced around the connector 30 at intervals. Multiple stress sensors can more accurately and comprehensively obtain the stress value between the connector 30 and the wall of the slot 201. The controller is electrically connected to the drive structure 40 and the multiple stress sensors; the controller receives the stress values ​​output by the stress sensors and can control the drive structure 40 to rotate the connector 30 according to the stress values, thereby adjusting the contact state between the connector 30 and the slot 201 and reducing stress concentration.

[0030] It should be noted that the electrical connection and interaction between the stress sensor, the drive structure 40, and the controller all utilize existing technologies. The specific location of the stress sensor is not shown in the diagram; the stress sensor can be placed at any position within the slot 201.

[0031] In one embodiment of the present invention, the drive structure 40 includes a first drive component 41 and a second drive component 42. Both the first drive component 41 and the second drive component 42 are mounted on the base frame 10 and are connected to the mounting end 31. The first drive component 41 is used to drive the connector 30 to rotate relative to the mounting end 31 about a first direction, and the second drive component 42 is used to drive the connector 30 to rotate relative to the mounting end 31 about a second direction. The first direction is perpendicular to the second direction.

[0032] Specifically, the drive structure 40 includes a first drive assembly 41 and a second drive assembly 42, both mounted on the base frame 10 and connected to the mounting end 31 of the connector 30. The first drive assembly 41 drives the connector 30 to rotate relative to the mounting end 31 around a first direction, and the second drive assembly 42 drives the connector 30 to rotate relative to the mounting end 31 around a second direction, with the first and second directions perpendicular to each other. Through the coordinated action of the first drive assembly 41 and the second drive assembly 42, the connector 30 can adjust its posture within two mutually perpendicular rotational degrees of freedom, achieving full-angle adjustment of the connector 30. This allows for a more comprehensive change in the contact position between the connector 30 and the slot 201, thereby better eliminating stress concentration between the connector 30 and the slot 201 and improving the reliability and durability of the connector device 100 and the pipe jacking machine 200.

[0033] In one embodiment of the present invention, the mounting end 31 is connected to a gear 311 via a connecting shaft 312. The extension direction of the connecting shaft 312 and the axial direction of the gear 311 are arranged along a second direction. The first drive assembly 41 includes two first drive seats 412 spaced apart along the worm 411 and along a first direction. Both first drive seats 412 are mounted on the base frame 10. The worm 411 is arranged between the first drive seats 412 along the first direction. The two ends of the worm 411 are respectively connected to the two first drive seats 412. The gear 311 meshes with the worm 411. Both first drive seats 412 are used to drive the worm 411 to rotate around the first direction to drive the gear 311, the connecting shaft 312 and the connector 30 to rotate around the second direction. The second drive assembly 42 is movably connected to the connecting shaft 312. The connecting shaft 312 can move relative to the second drive assembly 42 along the first direction. The second drive assembly 42 is used to drive the connecting shaft 312 to rotate around the first direction to drive the connector 30 to rotate around the first direction.

[0034] It should be noted that the first direction is Figure 4 The left and right directions, the second direction is Figure 4 The front and back directions are not shown in the figure.

[0035] Furthermore, the mounting end 31 is connected to the gear 311 via a connecting shaft 312, the extension direction of the connecting shaft 312 and the axial direction of the gear 311 are arranged along the second direction; the first drive assembly 41 includes a worm 411 and two first drive seats 412 spaced apart along the first direction, both first drive seats 412 are mounted on the base frame 10, the worm 411 is arranged between the first drive seats 412 along the first direction, and the two ends of the worm 411 are respectively connected to the two first drive seats 412, and the gear 311 meshes with the worm 411; the two first drive seats 412 drive the worm 411 to rotate around the first direction, driving the gear 311 and the connecting shaft 312 to rotate along the first direction. The connecting shaft 312 and the plug 30 rotate around the second direction; the second drive assembly 42 is movably connected to the connecting shaft 312, and the connecting shaft 312 can move relative to the second drive assembly 42 along the first direction. The second drive assembly 42 drives the connecting shaft 312 to rotate around the first direction, thereby driving the plug 30 to rotate around the first direction; through the meshing of the worm gear 411 and the gear 311 and the movable cooperation between the second drive component 2051 and the connecting shaft 312, the first drive assembly 41 and the second drive assembly 42 drive the plug 30 to achieve orthogonal rotation, so that the plug 30 can continuously adjust its posture in two mutually perpendicular directions. The structure is ingeniously designed.

[0036] In one embodiment of the present invention, the second drive assembly 42 includes a tilting frame 421 and two second drive seats 422. The two second drive seats 422 are spaced apart on the base frame 10 along a first direction. Two first drive seats 412 are disposed between the two second drive seats 422, and each first drive seat 412 is spaced apart from each second drive seat 422. The tilting frame 421 includes a guide rail 4211 and two tilting arms 4212. The guide rail 4211 extends along the first direction. A connecting shaft 312 is movably inserted through the guide rail 4211 along the first direction. The two tilting arms 4212 are respectively connected to the two ends of the guide rail 4211 along the first direction, and the two tilting arms 4212 are respectively connected to the two second drive seats 422. The two second drive seats 422 are each used to drive the two tilting arms 4212 to rotate around the first direction, so as to drive the guide rail 4211 and the connecting shaft 312 to rotate around the first direction.

[0037] Furthermore, the second drive assembly 42 includes a tilting frame 421 and two second drive seats 422. The two second drive seats 422 are spaced apart on the base frame 10 along a first direction, and two first drive seats 412 are located between the two second drive seats 422 and spaced apart from each other. The tilting frame 421 is provided with a guide rail 4211 extending along the first direction and two tilting arms 4212. A connecting shaft 312 is movably inserted through the guide rail 4211 along the first direction. The two tilting arms 4212 are respectively fixed to both ends of the guide rail 4211 along the first direction and respectively connected to the corresponding second drive seats 422. The second drive seat 422 synchronously drives the tilting arm 4212 to rotate around the first direction, causing the guide rail 4211 and the connecting shaft 312 passing through it to rotate together around the first direction, so that the plug 30 can obtain the swing freedom around the first direction; at the same time, the connecting shaft 312 can still slide along the first direction within the guide rail 4211, ensuring that the first drive seat 412 can drive the connecting shaft 312 to rotate around the second direction without interference through the cooperation between the worm gear 411 and the gear 311. Thus, the same connecting shaft 312 can rotate independently relative to the plug end 32 in two perpendicular directions. The structure is simple and the design is ingenious.

[0038] It should be noted that when the worm gear 411 and the tilting arm 4212 rotate at the same speed, the connector 30 rotates only around the first direction; when the worm gear 411 and the tilting arm 4212 rotate at different speeds, the connector 30 rotates both around the first direction and around the second direction; when the tilting arm 4212 stops rotating and only the worm gear 411 rotates, the connector 30 rotates only around the second direction.

[0039] In one embodiment of the present invention, the slot 201 includes a first insertion area 2011 and a second insertion area 2012 arranged sequentially from the outside to the inside. The inner diameter of the first insertion area 2011 is larger than the inner diameter of the second insertion area 2012. A limiting step 2013 is formed between the first insertion area 2011 and the second insertion area 2012. The connector 30 includes a first insertion part 33 and a second insertion part 34. The first insertion part 33 is shaped and fits into the first insertion area 2011. The second insertion part 34 is shaped and fits into the second insertion area 2012. An abutting step is formed between the first insertion part 33 and the second insertion part 34. The abutting step and the limiting step 2013 abut against each other.

[0040] Specifically, the slot 201 has a first insertion area 2011 and a second insertion area 2012 arranged sequentially from the inlet inwards. The inner diameter of the first insertion area 2011 is larger than the inner diameter of the second insertion area 2012, and a limiting step 2013 is formed between the first insertion area 2011 and the second insertion area 2012. The connector 30 has a corresponding first insertion part 33 and a second insertion part 34. The first insertion part 33 matches the shape of the first insertion area 2011 and is inserted into it, and the second insertion part 34 matches the shape of the second insertion area 2012 and is inserted into it. An abutting step is formed between the first insertion part 33 and the second insertion part 34. The insertion end 32 is located in the second insertion part 34, and the mounting end 31 is located in the first insertion part 33. When the connector 30 is inserted into place, the abutting step and the limiting step 2013 abut against each other, which can realize the rapid positioning of the connector 30 and the transfer of load. The load of the connector 30 can be distributed to the limiting step 2013, avoiding the concentration of all load on the bottom wall 2015, and effectively preventing stress concentration on the bottom wall 2015.

[0041] In one embodiment of the present invention, an elastic buffer layer 2014 is stacked on the limiting step 2013, and a pressure sensor is also provided on the side of the elastic buffer layer 2014 near the first insertion area 2011. The pressure sensor is electrically connected to the controller of the connector device 100.

[0042] Furthermore, an elastic buffer layer 2014 is stacked on the limiting step 2013. A pressure sensor is embedded on the side of the elastic buffer layer 2014 facing the first insertion area 2011. The pressure sensor is electrically connected to the controller of the connector device 100. When the connector 30 is inserted into the slot 201, the abutting step and the limiting step 2013 clamp the elastic buffer layer 2014, causing the elastic buffer layer 2014 to undergo compression deformation, absorbing the impact and homogenizing the abutting force between the abutting step and the limiting step 2013. At the same time, the pressure sensor detects the abutting force between the abutting step and the limiting step 2013 in real time and feeds it back to the controller. The controller adjusts the drive structure 40 according to the detected abutting force to keep the abutting force within the set range. This can effectively prevent the abutting force between the limiting step 2013 and the abutting step from being too large, which could lead to local deformation or damage. This further extends the service life of the connector device 100 and the pipe jacking machine 200 and improves the reliability of use.

[0043] Among them, the elastic buffer layer 2014 is a thick nickel-titanium alloy shape memory metal sheet buffer layer. As an elastic buffer layer 2014, the thick nickel-titanium alloy shape memory metal sheet has both super elasticity and self-recovery ability. It can generate large and uniform deformation in the high stress contact area between the abutment step and the limiting step 2013, instantly absorb impact energy and automatically rebound, and eliminate plastic accumulation. Its high fatigue life and corrosion resistance ensure that it maintains constant stiffness and buffering effect after long-term repeated compression, avoiding the aging of traditional rubber or fatigue failure of metal springs, and significantly improving the reliability, durability and maintenance cycle of the pipe jacking machine 200 slot 201 and the joint device 100 under complex dynamic loads.

[0044] In one embodiment of the present invention, a locking component is provided in the slot 201, which is used to lock or unlock the connector 30 inserted into the slot 201.

[0045] Specifically, a locking assembly is installed within the slot 201. When the connector 30 is inserted into the slot 201, the locking assembly automatically activates and locks the connector 30, preventing axial slippage or rotational loosening of the connector 30 relative to the slot 201 during jacking or pullback. This avoids the construction risks caused by accidental detachment of the connector device 100 from the pipe jacking machine 200, thereby improving the safety and reliability of the pipe jacking operation. The locking assembly is not shown in the figure.

[0046] In one embodiment of the present invention, the end of the connector 30 opposite to the mounting end 31 is the plug end 32. A first stress compensation component 202 is provided on the bottom groove wall 2015 of the slot 201, and a second stress compensation component 204 is provided on the side groove wall of the slot 201. The first stress compensation component 202 is used to always abut against the plug end 32, and the second stress compensation component 204 is used to always abut against the outer periphery of the connector 30.

[0047] Specifically, a first stress compensation component 202 is provided on the bottom trench wall 2015, and a second stress compensation component 204 is provided on the side trench wall of the slot 201. The first stress compensation component 202 is always in contact with the conical surface of the insertion end 32, and the second stress compensation component 204 is always in contact with the outer periphery of the insertion connector 30. When the insertion connector 30 rotates around the mounting end 31 under the action of the driving structure 40 and the contact position changes, the first stress compensation component 202 and the second stress compensation component 204 respectively generate adaptive micro-movements along the normal of the bottom trench wall 2015 and the normal of the side trench wall, maintaining the contact state unchanged. This allows the contact stress between the insertion connector 30 and the slot 201 to be continuously redistributed, thereby instantly dispersing the stress peak, suppressing stress concentration, and absorbing the slight vibration of the formation and manufacturing errors. This reduces the sensitivity to the dimensional accuracy of the slot 201 and the insertion connector 30 of the pipe jacking machine 200, and improves the reliability and durability of the pipe jacking machine 200 and the connector device 100.

[0048] In one embodiment of the present invention, the first stress compensation component 202 includes a plurality of first stress compensation structures 203. A plurality of first mounting grooves 2016 are recessed on the bottom groove wall 2015 in a direction away from the slot 201. The openings of the first mounting grooves 2016 are located on the bottom groove wall 2015. The number of first stress compensation structures 203 and the number of first mounting grooves 2016 are the same and correspond one-to-one. Each first stress compensation structure 203 is installed in its corresponding first mounting groove 2016, and each first stress compensation structure 203 extends out of its corresponding first mounting groove 2016. The slot of 6 is always in contact with the plug end 32; the second stress compensation component 204 includes a plurality of second stress compensation structures 205 arranged at intervals around the plug 30, and a plurality of second mounting slots 2017 are opened on the side wall corresponding to the positions of the plurality of second stress compensation structures 205. The slot of the second mounting slot 2017 is located on the side wall, and the second stress compensation structure 205 is installed in the corresponding second mounting slot 2017. Each second stress compensation structure 205 is used to ensure that the slot of its corresponding second mounting slot 2017 is always in contact with the outer periphery of the plug 30.

[0049] Furthermore, the bottom groove wall 2015 is recessed in the direction away from the slot 201 to form a plurality of circumferentially distributed first mounting grooves 2016, the openings of the first mounting grooves 2016 being flush with the bottom groove wall 2015; the first stress compensation component 202 includes a plurality of first stress compensation structures 203 corresponding one-to-one with the plurality of first mounting grooves 2016, each structure being installed in its corresponding first mounting groove 2016 and extending from the groove opening, and always maintaining contact with the plug end 32. When the plug 30 rotates and its contact position changes under the drive structure 40, each first stress compensation structure 203 adaptively expands and contracts within its respective first mounting groove 2016, always pressing against the conical surface, so as to always provide support for the plug end 32, thereby instantly dispersing the stress between the plug 30 and the slot 201, thereby further reducing stress concentration, and thus extending the service life of the pipe jacking machine 200 and the joint device 100. The second stress compensation component 204 includes multiple second stress compensation structures 205 spaced around the connector 30. An equal number of second mounting slots 2017 are formed at corresponding positions on the side wall, with the openings of the second mounting slots 2017 all facing the outer periphery of the connector 30. Each second stress compensation structure 205 is installed within its corresponding second mounting slot 2017 and extends from the opening of the slot, always maintaining contact with the outer periphery of the connector 30. When the connector 30 rotates with the drive structure 40 or wobbles, each second stress compensation structure 205 adaptively expands and contracts within its respective second mounting slot 2017, forming continuous and uniform lateral support along the circumference. This distributed multi-point contact promptly redistributes lateral contact stress, avoiding localized stress concentration, and suppressing minor wobbling of the connector 30 within the slot 201, further improving the operational stability, reliability, and durability of the pipe jacking machine 200 and the connector device 100.

[0050] In one embodiment of the present invention, the first stress compensation structure 203 includes a first driving member 2031, a first abutting block 2032, and a pressure sensor. The first driving member 2031 is installed in its corresponding first mounting groove 2016. The first abutting block 2032 is connected to the first driving member 2031 and is disposed at the opening of the first mounting groove 2016. The first driving member 2031 is used to drive the first abutting block 2032 to move toward or away from the insertion end 32 so that the first abutting block 2032 and the insertion end 32 are always in contact. The pressure sensor is disposed at the end of the first abutting block 2032 that abuts with the insertion end 32.

[0051] Furthermore, the first stress compensation structure 203 fixes its first driving member 2031 in the corresponding first mounting groove 2016, and the first abutting block 2032 is connected to the first driving member 2031 and located at the groove opening; the first driving member 2031 drives the first abutting block 2032 to extend or retract towards the insertion end 32 in real time, so that the first abutting block 2032 always maintains contact with the conical insertion end 32. At the same time, the pressure sensor placed on the abutting end face feeds back the contact force signal to the controller, and the controller adjusts the output of the first driving member 2031 in real time to maintain a constant abutting force between the first abutting block 2032 and the insertion end 32. This can effectively avoid stress fluctuations caused by the first abutting block 2032 being too tight or loose with the insertion end 32, thereby further reducing stress concentration, extending the service life of the pipe jacking machine 200 and the joint device 100 and improving construction reliability.

[0052] In one embodiment of the present invention, the second stress compensation structure 205 includes a second driving member 2051 and a second abutting block 2052. The second driving member 2051 is installed in its corresponding second mounting groove 2017, and the second abutting block 2052 is connected to the second driving member 2051. A first abutting block 2032 is disposed at the opening of the second mounting groove 2017. The second driving member 2051 is used to drive the second abutting block 2052 to move toward or away from the outer periphery of the connector 30, so that the second abutting block 2052 always abuts against the outer periphery of the connector 30.

[0053] Specifically, the second stress compensation structure 205 fixes its second driving member 2051 in the corresponding second mounting groove 2017, and the second abutment block 2052 is connected to the second driving member 2051 and located at the groove opening; the second driving member 2051 drives the second abutment block 2052 to extend or retract towards the outer periphery of the connector 30 in real time, so that the second abutment block 2052 always maintains contact with the outer periphery of the connector 30. The second abutment block 2052 can form a continuous and adjustable support force for the connector 30 along the circumference of the slot 201, which can compensate for the posture changes of the connector 30 at any time, effectively prevent local stress concentration in the connector 30, effectively extend the service life of the pipe jacking machine 200 and the connector device 100, and improve the overall reliability and durability.

[0054] The above description is merely an exemplary embodiment of the present invention and does not limit the scope 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 protection scope of the present invention.

Claims

1. A connector device for a pipe jacking machine, characterized in that, The connector is used to connect the pipe jacking machine to the pilot pipe. The pipe jacking machine has a slot formed on it. The connector includes: Base frame; A connecting part is mounted on the base frame and is used to connect with the pilot tube; A connector and a drive structure are provided. The drive structure is mounted on the base frame. One end of the connector is a mounting end, which is connected to the drive structure. The connector is used to be inserted into the slot, and the drive structure is used to drive the connector to rotate around the mounting end. A stress monitoring component is disposed on the outer periphery of the connector, and the stress monitoring component is used to obtain the stress value between the connector and the groove wall of the slot; The controller, the drive structure and the stress monitoring component are all electrically connected to the controller; The driving structure includes a first driving component and a second driving component. Both the first and second driving components are mounted on the base frame and connected to the mounting end. The first driving component drives the connector to rotate relative to the mounting end about a first direction, and the second driving component drives the connector to rotate relative to the mounting end about a second direction. The first direction is perpendicular to the second direction. The mounting end is connected to a gear via a connecting shaft. The extension direction of the connecting shaft and the axial direction of the gear are arranged along the second direction. The first driving component includes two gears spaced apart along the worm and along the first direction. Two first drive seats are mounted on the base frame. A worm gear is disposed between the first drive seats along the first direction. The two ends of the worm gear are respectively connected to the two first drive seats. A gear meshes with the worm gear. Both first drive seats are used to drive the worm gear to rotate around the first direction, thereby driving the gear, the connecting shaft, and the connector to rotate around the second direction. A second drive assembly is movably connected to the connecting shaft. The connecting shaft can move relative to the second drive assembly along the first direction. The second drive assembly is used to drive the connecting shaft to rotate around the first direction, thereby driving the connector to rotate around the first direction.

2. The joint device for the pipe jacking machine as described in claim 1, characterized in that, The second drive assembly includes a tilting frame and two second drive seats. The two second drive seats are spaced apart on the base frame along a first direction, and the two first drive seats are disposed between the two second drive seats, with each first drive seat spaced apart from each second drive seat. The tilting frame includes a guide rail and two tilting arms. The guide rail extends along the first direction, and the connecting shaft is movably inserted through the guide rail along the first direction. The two tilting arms are respectively connected to the two ends of the guide rail along the first direction, and the two tilting arms are respectively connected to the two second drive seats. Each of the two second drive seats is used to drive the two tilting arms to rotate around the first direction, so as to drive the guide rail and the connecting shaft to rotate around the first direction.

3. The joint device of the pipe jacking machine as described in any one of claims 1 to 2, characterized in that, The slot includes a first insertion area and a second insertion area arranged sequentially from the outside to the inside. The inner diameter of the first insertion area is larger than the inner diameter of the second insertion area. A limiting step is formed between the first insertion area and the second insertion area. The connector includes a first insertion part and a second insertion part. The first insertion part matches the shape of the first insertion area and is inserted into it. The second insertion part matches the shape of the second insertion area and is inserted into it. An abutting step is formed between the first insertion part and the second insertion part. The abutting step and the limiting step abut into each other.

4. The joint device for the pipe jacking machine as described in claim 3, characterized in that, An elastic buffer layer is stacked on the limiting step, and a pressure sensor is also provided on the side of the elastic buffer layer near the first insertion area. The pressure sensor is electrically connected to the controller of the connector device.

5. The joint device for the pipe jacking machine as described in claim 3, characterized in that, The slot is provided with a locking component, which is used to lock or unlock the connector inserted into the slot.

6. The joint device for the pipe jacking machine as described in claim 3, characterized in that, The end of the connector opposite to the mounting end is the plug-in end. A first stress compensation component is provided on the bottom wall of the slot, and a second stress compensation component is provided on the side wall of the slot. The first stress compensation component is used to always abut against the plug-in end, and the second stress compensation component is used to always abut against the outer periphery of the connector.

7. The joint device for a pipe jacking machine as described in claim 6, characterized in that, The first stress compensation component includes a plurality of first stress compensation structures. The bottom groove wall is recessed in the direction away from the slot to form a plurality of first mounting grooves. The number of first stress compensation structures is the same as the number of first mounting grooves and they correspond one-to-one. The opening of the first mounting groove is located in the bottom groove wall. Each first stress compensation structure is installed in its corresponding first mounting groove. Each first stress compensation structure is used to extend out of the opening of its corresponding first mounting groove and always abut against the plug-in end. The second stress compensation component includes a plurality of second stress compensation structures spaced around the connector. The side wall has a plurality of second mounting slots corresponding to the positions of the plurality of second stress compensation structures. The opening of the second mounting slot is located on the side wall. The second stress compensation structure is installed in the corresponding second mounting slot. Each second stress compensation structure is used to ensure that the opening of its corresponding second mounting slot is always in contact with the outer periphery of the connector.

Images