Hydraulic drive sectional type miniature pipe jacking machine suitable for compound stratum

Abstract

The utility model discloses a hydraulic drive sectional type miniature pipe jacking machine suitable for a composite stratum, and relates to the field of miniature pipe jacking machines for the composite stratum. Comprising a first section, a second section and a third section which are connected in a pluggable mode, the first section mainly plays a basic role in pipe jacking construction, the second section mainly plays a role in connection of the front section and the rear section and conversion of a muddy water system, and the third section is responsible for control over water inlet and mud discharge and posture adjustment of the pipe jacking machine. The muddy water system is sequentially divided into a first muddy water mechanism, a second muddy water mechanism and a third muddy water mechanism according to a sectional structure, the first muddy water mechanism, the second muddy water mechanism and the third muddy water mechanism are integrated in a first section, a second section and a third section respectively, the first muddy water mechanism is used for muddy water supply and preliminary mixing in the pipe jacking construction process, and the second muddy water mechanism achieves the conversion function of the muddy water system. And the third muddy water mechanism is used for supplying and discharging muddy water. The utility model is used for solving the problems that the size is large, the primary crushing effect is poor, the secondary crushing function is lacked and a cement system cannot adapt to complex stratums.

Description

Technical Field

[0001] The utility model belongs to the field of micro pipe jacking machines for composite strata, and specifically relates to a liquid-driven sectional micro pipe jacking machine suitable for composite strata. Background Art

[0002] With the acceleration of China's urbanization process, the demand for the development and utilization of underground space resources is increasing day by day. Especially in the construction of urban infrastructure such as water supply, gas supply, power supply, and communication, the construction of small-diameter pipe jacking is particularly important. However, when constructing in the underground scenario of small-diameter pipe jacking, especially for the composite strata with complex and changeable geological conditions, many challenges are often faced. At present, there are many deficiencies in the micro pipe jacking machines used in China when dealing with composite strata.

[0003] 1. Economy and construction adaptability: The existing pipe jacking machines and the required working shaft sizes are too large. The large-sized equipment not only increases the construction cost but also prolongs the production cycle, affecting the overall project progress. Especially in narrow urban spaces or complex environments, the large-sized equipment is difficult to adapt to, greatly limiting the possibility of construction.

[0004] 2. Crushing effect: There are obvious deficiencies in the crushing effect of the existing pipe jacking machines, mainly reflected in the poor primary crushing effect and the lack of secondary crushing function. Due to the too small cross-sectional area of the cutter head, it is impossible to install a sufficient number and size of hob cutters, resulting in a poor primary crushing effect and being unable to effectively deal with complex strata. At the same time, the lack of secondary crushing function makes the construction extremely difficult when facing composite strata such as clay and pebble layers, increasing the construction difficulty and risk. This lack of adaptability to composite strata seriously restricts the application of existing pipe jacking machines under a wider range of geological conditions.

[0005] 3. Performance and operation: The various valves in the cement system are large in volume and cannot realize the mutual switching of front water supply, rear water supply, and mud discharge required for pipe jacking in composite strata, restricting the flexible response ability of the pipe jacking machine in complex strata and affecting the construction efficiency and safety. In addition, the currently used motors, speed reducers, deviation correction cylinders, etc. are too large in volume to be installed in the pipe jacking machine, resulting in poor overall structural compactness of the equipment, complex operation, not only occupying valuable construction space but also increasing the failure rate and maintenance difficulty.

[0006] In summary, the existing pipe jacking machines have limitations in many aspects and cannot meet the construction requirements of the complex and changeable strata and narrow spaces in China. Therefore, it is particularly important to develop a micro pipe jacking machine suitable for composite strata to achieve more efficient and economical construction effects. Summary of the Utility Model

[0007] The utility model provides a liquid-driven sectionalized micro pipe jacking machine applicable to composite strata, which solves the problems of large size, poor primary crushing effect, lack of secondary crushing function and inability of the cement system to adapt to complex strata, reduces the size for going down the well, improves the crushing effect, optimizes the cement system, and greatly improves the adaptability to composite strata and narrow spaces.

[0008] The technical solution adopted by the utility model is as follows:

[0009] A liquid-driven sectionalized micro pipe jacking machine applicable to composite strata includes a first section, a second section and a third section. The first section, the second section and the third section are connected by plug-in connection. Among them,

[0010] The first section successively includes a cutter head assembly, a mud chamber assembly, a power system, a front cylinder assembly and a first rear cylinder assembly. The cutter head assembly is located at the forefront of the pipe jacking machine. The cutter head assembly is connected to the mud chamber assembly by plug-in connection. The power system is movably connected to the cutter head assembly. The power system is connected to the mud chamber assembly and the front cylinder assembly by plug-in connection. The first rear cylinder assembly is movably connected to the front cylinder assembly;

[0011] The second section includes a second rear cylinder assembly, and the second rear cylinder assembly is connected to the first rear cylinder assembly by plug-in connection;

[0012] The third section includes a third rear cylinder assembly and a fourth rear cylinder assembly. The third rear cylinder assembly is connected to the second rear cylinder assembly by plug-in connection. The fourth rear cylinder assembly is fixedly connected to the third rear cylinder assembly.

[0013] It further includes a slurry system, and the slurry system is successively divided into a first slurry mechanism, a second slurry mechanism and a third slurry mechanism according to the sectionalized structure, and is respectively integrated in the first section, the second section and the third section.

[0014] Furthermore, the cutter head assembly includes a cutter head disk surface. A plurality of edge inserted-tooth hob cutters, front inserted-tooth hob cutters and single-edge scraping cutters are arranged on the cutter head disk surface. A cutter head outer ring rib is wound around the outer edge of the cutter head disk surface. A plurality of wear-resistant flow guiding plates are fixedly connected to the outer edge surface of the cutter head outer ring rib. A torsion leg is fixedly connected to the cutter head disk surface. The other end of the torsion leg is fixedly connected to a cutter head cone sleeve. The cutter head cone sleeve is coaxial with the cutter head disk surface. The cutter head cone sleeve is connected to the power system. A plurality of crushing teeth are fixedly connected to the outer cylindrical surface of the cutter head cone sleeve. A spiral mud guiding plate is fixedly connected to the conical circular surface of the cutter head cone sleeve. The spiral mud guiding plate spirally ascends. The spiral mud guiding plate has the same taper as the cutter head cone sleeve. One end of the spiral mud guiding plate extends deep into the mud chamber assembly.

[0015] Further, the mud bin assembly includes a mud bin cylinder body and a mud bin connecting flange. A plurality of mud bin horn cones are arranged inside the mud bin cylinder body. The plurality of mud bin horn cones are fixedly connected to corresponding numbers of flange fixed cone crushing teeth. A plurality of fixed cone crushing ribs are distributed and fixedly connected to the inner surface of the mud bin horn cone. One end of the mud bin connecting flange is fixedly connected to the mud bin cylinder body, and the other end is connected to the power system.

[0016] Further, the power system includes a power main shaft, which is located at the forefront of the power system. A sealing mud cover, a power connecting flange, a power housing, a speed reducer, and a hydraulic motor are sequentially connected to the power main shaft. One end of the power main shaft is movably connected to the cutter head assembly. One end of the power connecting flange is connected to the mud bin assembly, and the other end is connected to the front cylinder assembly. The power connecting flange is provided with mud discharge ports, a front water supply port, and a rear water supply port. Bearings and a main shaft are arranged inside the power housing.

[0017] Further, the front cylinder assembly includes a front cylinder connecting flange and a front cylinder body. The front cylinder connecting flange is installed at one end of the front cylinder body. The front cylinder connecting flange is connected to the power system. A plurality of front cylinder alignment supports are installed inside the front cylinder body. A rotation limiting seat is fixedly connected to the upper end inside the front cylinder body;

[0018] The first rear cylinder assembly includes a first rear cylinder body. One end of the first rear cylinder body is connected to the front cylinder body. A rotation limiting pin is fixedly connected to the upper part of the front end of the first rear cylinder body. The rotation limiting pin is matched with the rotation limiting seat. A plurality of first rear cylinder alignment supports are fixedly connected to the inner wall of the first rear cylinder body. Support rib plates are welded behind the plurality of first rear cylinder alignment supports respectively. The first rear cylinder alignment supports extend out of the first rear cylinder body.

[0019] Further, an alignment cylinder is also included. A plurality of the alignment cylinders are arranged in the front cylinder assembly and the first rear cylinder assembly. One end of the alignment cylinder is fixedly connected to the front cylinder alignment support, and the other end of the alignment cylinder is fixedly connected to the first rear cylinder alignment support.

[0020] Further, the second rear cylinder assembly includes a second rear cylinder body, a second rear cylinder front flange, and a second rear cylinder rear flange. The second rear cylinder front flange is fixedly connected to the second rear cylinder body. The second rear cylinder rear flange is located at the end of the second rear cylinder body. The second rear cylinder rear flange is connected to the third rear cylinder assembly;

[0021] The third rear cylinder assembly includes a third front rear-cylinder flange, a third rear-cylinder barrel body, and a third rear rear-cylinder flange. The third front rear-cylinder flange is connected to one end of the third rear-cylinder barrel body, and the third rear rear-cylinder flange is connected to the other end of the third rear-cylinder barrel body. The third front rear-cylinder flange is connected to the second rear-cylinder assembly. An electrical box assembly and a micro-valve group assembly are installed inside the third rear-cylinder barrel body. The electrical box assembly is fixed to the upper top inside the third rear-cylinder barrel body, and a camera assembly is fixedly installed on one side of the third front rear-cylinder flange.

[0022] Further, the fourth rear-cylinder assembly includes a fourth rear-cylinder barrel body, a fourth rear-cylinder flange, a precision rolled threaded steel, an anti-rotation pin, a water supply flange assembly, and a sludge discharge flange assembly. The fourth rear-cylinder flange is fixedly connected to the fourth rear-cylinder barrel body. The fourth rear-cylinder flange is connected to the third rear-cylinder assembly. Two holes are formed in the fourth rear-cylinder flange. The water supply flange assembly and the sludge discharge flange assembly are respectively arranged on both sides of the two holes. The anti-rotation pin is arranged on the fourth rear-cylinder flange. The anti-rotation pin is connected to the mud-water system, and the precision rolled threaded steel is fixedly connected to the anti-rotation pin.

[0023] Further, a target surface position assembly is further included. The target surface position assembly is located in the middle of the tail of the first rear-cylinder assembly and on one side of the first rear-cylinder deviation rectification support. The target surface position assembly includes a target surface support plate, a target surface panel, a target surface pendulum needle, and a plumb bob. The target surface support plate is fixed below the rotation limit pin. The target surface panel is fixed on the target surface support plate. The plumb bob is movably connected to the target surface panel and always remains vertical. One end of the target surface pendulum needle is a screw structure, and the target surface pendulum needle is screwed in the middle of the side of the plumb bob facing the tail of the pipe jacking machine.

[0024] Further, the first mud-water mechanism includes a front water supply component, a first front water supply pipe, a first rear water supply pipe, a first sludge discharge pipe, a first mud-water pipeline fixing plate, and a front water supply box. The first front water supply pipe, the first rear water supply pipe, and the first sludge discharge pipe are connected to corresponding mud-water telescopic pipes. A ball valve is arranged at the end of the mud-water telescopic pipe. The mud-water telescopic pipe is movably fixed in the front cylinder assembly through the first mud-water pipeline fixing plate and is connected to the front water supply component. The front water supply box is arranged on the front cylinder assembly. The front water supply component includes a mud tank water box and a drain port. The mud tank water box is fixedly connected between the mud tank connection flange and the mud tank horn cone. A plurality of through holes are correspondingly formed on the outer circumferential surfaces of the mud tank horn cone and the flange fixed cone crushing teeth, and the plurality of through holes form the drain port.

[0025] The beneficial effects of the present utility model are:

[0026] 1. The utility model adopts a segmented type, divides the pipe jacking machine into multiple sections for construction down the well, and realizes the modularization and detachable property of the equipment structure through plug-and-play connection. This design greatly reduces the size for going down the well, makes the equipment easier to be deployed in narrow spaces or complex environments, and significantly improves the construction adaptability. In addition, the segmented type of the pipe jacking machine provides favorable conditions for convenient maintenance, convenient replacement of the wellhead, and convenient construction down the well. Since the equipment size is reduced, the requirements for the working well are also correspondingly reduced, further saving the construction cost and time and accelerating the project progress.

[0027] 2. In the utility model, the cutter head assembly in the first section is located at the very front end, and can perform preliminary crushing for the composite stratum. By optimizing the design of the cutter head structure and the hob configuration, the crushing ability of the cutter head is improved, ensuring a significant improvement in the primary crushing effect; the mud chamber assembly follows the cutter head assembly closely, and is used for secondary crushing of the stratum after the primary crushing and mixing with water to form a mud-water mixture. This design effectively solves the problem of poor primary crushing effect of the traditional pipe jacking machine and enhances the equipment's processing ability for complex strata.

[0028] 3. In the utility model, the mud-water system is divided into three independent mechanisms, namely the first mud-water mechanism, the second mud-water mechanism, and the third mud-water mechanism, which are respectively integrated in three sections of the structure. The mud-water system installed in each section has independent functions. This design realizes the precise control of mud-water supply, mixing, conversion, and discharge, and improves the adaptability and construction efficiency of the cement system in complex strata.

[0029] 4. In the utility model, the power system adopts an integral flange structure and is movably connected with the cutter head assembly, which not only ensures the stability of power transmission but also is convenient for maintenance and replacement. At the same time, since the power system is connected with other components through plug-and-play connection, the overall structure compactness and flexibility are improved.

[0030] 5. The structure of the utility model is simple, easy to manufacture, and has a low cost. The segmented design and modular structure make the operation and maintenance of the equipment more convenient. Each section can be independently disassembled and replaced, reducing the failure rate and maintenance difficulty, and improving the construction safety and reliability. Description of the Drawings

[0031] Figure 1 is a schematic diagram of the overall structure of the pipe jacking machine provided by the utility model;

[0032] Figure 2 is a front view of the overall pipe jacking machine provided by the utility model;

[0033] Figure 3 is a rear view of the overall pipe jacking machine provided by the utility model;

[0034] Figure 4 is a schematic diagram of the structure of the mud-water system provided by the utility model;

[0035] Figure 5 Schematic diagram of the cutter head assembly provided by the present utility model;

[0036] Figure 6 Schematic diagram of the mud bin assembly provided by the present utility model;

[0037] Figure 7 Front view of the mud bin assembly provided by the present utility model;

[0038] Figure 8 Schematic diagram of the power system provided by the present utility model;

[0039] Figure 9 Schematic diagram of the front cylinder assembly provided by the present utility model;

[0040] Figure 10 Cross-sectional view of the front cylinder assembly provided by the present utility model;

[0041] Figure 11 Schematic diagram of the first rear cylinder assembly provided by the present utility model;

[0042] Figure 12 Rear view of the first rear cylinder assembly provided by the present utility model;

[0043] Figure 13 Schematic diagram of the deviation correction oil cylinder provided by the present utility model;

[0044] Figure 14 Schematic diagram of the front end of the second rear cylinder assembly provided by the present utility model;

[0045] Figure 15 Cross-sectional view of the second rear cylinder assembly provided by the present utility model;

[0046] Figure 16 Schematic diagram of the tail end of the second rear cylinder assembly provided by the present utility model;

[0047] Figure 17 Schematic diagram of the front end of the third rear cylinder assembly provided by the present utility model;

[0048] Figure 18 Cross-sectional view of the third rear cylinder assembly provided by the present utility model;

[0049] Figure 19 Schematic diagram of the tail end of the third rear cylinder assembly provided by the present utility model;

[0050] Figure 20 Rear view of the third rear cylinder assembly provided by the present utility model;

[0051] Figure 21Schematic diagram of the positions of the electrical box assembly, micro valve group assembly and camera assembly provided by the present utility model;

[0052] Figure 22 Schematic diagram of the structure of the electrical box assembly provided by the present utility model;

[0053] Figure 23 Schematic diagram of the structure of the micro valve group assembly provided by the present utility model;

[0054] Figure 24 Schematic diagram of the structure of the camera assembly provided by the present utility model;

[0055] Figure 25 Schematic diagram of the structure of the fourth rear cylinder assembly provided by the present utility model;

[0056] Figure 26 Schematic diagram of the structure of the target surface position assembly provided by the present utility model;

[0057] Figure 27 Side view of the target surface position assembly provided by the present utility model.

[0058] In the drawings, the list of components represented by each reference numeral is as follows:

[0059] 1. Cutter head assembly; 2. Slurry chamber assembly; 3. Front cylinder assembly; 4. First rear cylinder assembly; 5. Second rear cylinder assembly; 6. Third rear cylinder assembly; 7. Fourth rear cylinder assembly; 8. Power system; 9. Slurry water system; 10. Steering cylinder; 11. Target position assembly; 1-1. Cutter head surface; 1-2. Edge inserted tooth hob; 1-3. Front inserted tooth hob; 1-4. Single-edge scraper; 1-5. Cutter head outer ring rib; 1-6. Wear-resistant flow guide plate; 1-7. Twisted leg; 1-8. Crushing tooth; 1-9. Spiral slurry guide plate; 1-10. Cutter head cone sleeve; 1-11. Edge hob support; 2-1. Slurry chamber cylinder; 2-2. Fixed cone crushing rib; 2-3. Slurry chamber horn cone; 2-4. Flange fixed cone crushing tooth; 2-5. Slurry chamber connecting flange; 3-1. Front cylinder connecting flange; 3-2. First screw guard ring; 3-3. Front cylinder steering support; 3-4. Front cylinder observation window; 3-5. Front cylinder cylinder; 3-6. Rotation limit seat; 4-1. First rear cylinder cylinder; 4-2. Rotation limit pin; 4-3. First rear cylinder steering support; 4-4. Support rib plate; 4-5. First quick-insert fixing plate; 5-1. Second rear cylinder cylinder; 5-2. Second rear cylinder front flange; 5-3. Second rear cylinder rear flange; 5-4. Second rear cylinder observation window; 5-5. Second screw guard ring; 5-6. Second quick-insert fixing plate; 6-1. Third rear cylinder front flange; 6-2. Third rear cylinder cylinder; 6-3. Third rear cylinder rear flange; 6-4. Third screw guard ring; 6-5. Third rear cylinder observation window; 6-6. Electrical box assembly; 6-7. Micro valve group assembly; 6-8. Camera assembly; 7-1. Fourth rear cylinder cylinder; 7-2. Fourth rear cylinder flange; 7-3. Fine rolled threaded steel; 7-4. Anti-rotation pin; 7-5. Water supply flange assembly; 7-6. Sludge discharge flange assembly; 8-1. Power main shaft; 8-2. Mud seal cover; 8-3. Power connection flange; 8-4. Power housing; 8-5. Reducer; 8-6. Hydraulic motor; 8-7. First pressure sensor; 9-1. First slurry water system; 9-2. Second slurry water system; 9-3. Third slurry water system; 9-4. Gear connector; 9-5. Second pressure sensor; 6-6-1. Electrical box; 6-6-2. Electrical box fixing ear; 6-7-1. Micro valve group support; 6-7-2. Micro valve group; 6-7-3. Micro valve group fixing screw; 6-8-1. Camera support; 6-8-2. Camera; 6-8-3. Camera fixing screw; 6-8-4. Camera support fixing screw; 9-1-1. Front water supply component; 9-1-2. First front water supply pipe; 9-1-3. First rear water supply pipe; 9-1-4. First sludge discharge pipe; 9-1-5. First slurry water pipeline fixing plate; 9-1-6. Slurry water expansion pipe; 9-1-7. Ball valve; 9-1-8. Front water supply box; 9-2-1. Second front water supply pipe; 9-2-2. Second rear water supply pipe; 9-2-3. Second sludge discharge pipe; 9-2-4. Slurry water expansion sleeve; 9-2-5. Second slurry water pipeline fixing plate; 9-2-6. By-pass valve;9-2-7, Integrated mud valve; 9-3-1, Water supply pipe; 9-3-2, Third row of mud pipes; 11-1, Target surface support plate; 11-2, Target surface panel; 11-3, Target surface swing needle; 11-4, Plumb bob shaft; 11-5, Plumb bob; 11-6, Target surface fixing screw; 11-7, Plumb bob fixing nut; 9-1-1-1, Mud bin water box; 9-1-1-2, Drain outlet; Specific implementation manner

[0060] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0061] Next, the technical solutions in the embodiments of this application will be clearly and completely described in conjunction with the accompanying drawings.

[0062] As Figures 1 - 27 shown, this embodiment provides a liquid-driven segmented micro pipe jacking machine applicable to composite strata, including the first section, the second section and the third section. The connection method between the first section, the second section and the third section is plug-and-play. Specifically, the first section sequentially includes a cutter head assembly 1, a mud bin assembly 2, a power system 8, a front cylinder assembly 3 and a first rear cylinder assembly 4 from front to back. The second section includes a second rear cylinder assembly 5. The third section includes a third rear cylinder assembly 6 and a fourth rear cylinder assembly 7. Among them, the first rear cylinder assembly 4 and the second rear cylinder assembly 5 are connected by plug-and-play, and the second rear cylinder assembly 5 and the third rear cylinder assembly 6 are connected by plug-and-play. At the same time, the first rear cylinder assembly 4 and the second rear cylinder assembly of the second rear cylinder assembly 5 are connected and locked with screws, and a sealing ring is arranged in the middle to play a sealing role. It should be noted that when the shells are plugged in, the mud connection pipes and hydraulic oil pipes are also plugged in and connected at the same time. Among them, the first section can be constructed alone in the well. The first section mainly undertakes the basic functions of pipe jacking construction. With the equipped movable inlet and outlet mud pipelines on the ground, pipe jacking construction can be realized. The second section mainly plays the role of connecting the front and rear sections and the conversion of the mud system 9. The third section is responsible for the control of water inlet and mud discharge and the attitude adjustment of the pipe jacking machine. The three sections are connected by plug-and-play, which is not only convenient for construction in the well, but also reduces the splicing difficulty in the working well. At the same time, the diameter requirement of the working well is reduced, making the pipe jacking machine applicable to narrow working sites and improving the flexibility and efficiency of construction.

[0063] Furthermore, as Figure 4As shown in the figure, the pipe jacking machine includes a slurry system 9. According to the design of the sectional structure, the slurry system 9 can also be divided into three slurry mechanisms, namely the first slurry mechanism 9-1, the second slurry mechanism 9-2, and the third slurry mechanism 9-3. The above three slurry mechanisms have independent functions in each section and are integrated with the housing. The first slurry mechanism 9-1 includes a front water supply component 9-1-1, a first front water supply pipe 9-1-2, a first rear water supply pipe 9-1-3, and a first mud discharge pipe 9-1-4. In the slurry system 9, there are also multiple ring connectors 9-4 for connecting and sealing the pipes between different components, which can not only ensure fine adjustment during assembly but also ensure the convenience of disassembly and assembly during assembly and maintenance. The first front water supply pipe 9-1-2, the first rear water supply pipe 9-1-3, and the first mud discharge pipe 9-1-4 are respectively connected to the corresponding slurry expansion pipes 9-1-6 through the ring connectors 9-4. The surface of the slurry expansion pipe 9-1-6 is surface-treated with chromium plating. A ball valve 9-1-7 is provided at the end of each slurry expansion pipe 9-1-6. The slurry expansion pipe 9-1-6 is movably fixed in the front cylinder assembly 3 through the first slurry pipeline fixing plate 9-1-5, and positioning retaining rings are provided before and after the first slurry pipeline fixing plate 9-1-5. In addition, an opening is provided on the front cylinder assembly 3 and a front water supply box 9-1-8 is provided. The front water supply box 9-1-8 is annular in shape, connected to the front water supply component 9-1-1 on one side and to the first front water supply pipe 9-1-2 on the other side, so that the water flow is introduced from the first front water supply pipe 9-1-2 into the front water supply component 9-1-1, and then the water flow is introduced to the flange fixed cone crusher teeth 2-4 of the mud chamber assembly 2. The first rear water supply pipe 9-1-3 introduces the water flow into the mud chamber cylinder 2-1 of the mud chamber assembly 2. The first mud discharge pipe 9-1-4 is used to discharge the slurry in the mud chamber cylinder 2-1. The front water supply and the rear water supply can be switched with each other or supply water simultaneously. Specifically, the front water supply component 9-1-1 will be introduced in the mud chamber assembly 2;The second slurry mechanism 9-2 includes a second front water supply pipe 9-2-1, a second rear water supply pipe 9-2-2, and a second sludge discharge pipe 9-2-3. At the front of the above three pipe bodies, there is a slurry expansion sleeve 9-2-4, and they are positioned by a second slurry pipeline fixing plate 9-2-5 welded to the second rear cylinder assembly 5. There is a complete set of seals inside the slurry expansion sleeve 9-2-4, which cooperates with the slurry expansion pipe 9-1-6 in the first section to connect and seal the pipes in the second section with the corresponding pipes in the first section, ensuring the expansion amount for deviation correction and eliminating the displacement generated by deviation correction. There are four seals inside the slurry expansion sleeve 9-2-4 to eliminate the leakage generated by deviation correction. The four seals are two Y-shaped rings and two support rings distributed alternately. The second slurry mechanism 9-2 also includes a bypass valve 9-2-6 and an integrated slurry valve 9-2-7. The second front water supply pipe 9-2-1 and the second rear water supply pipe 9-2-2 are uniformly supplied from the bypass valve 9-2-6, and the front water supply and the rear water supply can be switched with each other. The front end of the integrated slurry valve 9-2-7 is connected to the bypass valve 9-2-6 and the second sludge discharge pipe 9-2-3, and the rear end is connected to a pipe joint fixed on the housing through a tooth ring connector 9-4. The function of the integrated slurry valve 9-2-7 is to control the direct passage and bypass of water inlet and sludge discharge, and regulate the internal circulation and external circulation of the slurry system 9. The function of the bypass valve 9-2-6 is to regulate the front water supply and the rear water supply, switch the water supply and the water outlet of the pipe jacking machine according to the construction requirements, and meet the requirements of pipe jacking construction; The third slurry mechanism 9-3 includes a water supply pipe 9-3-1 and a third sludge discharge pipe 9-3-2, which are respectively connected to the third rear cylinder assembly 6 and the fourth rear cylinder assembly 7 through a tooth ring connector 9-4. In addition, the slurry system 9 also includes a second pressure sensor 9-5. There are two second pressure sensors 9-5, which are respectively installed at the ends of the water supply pipe 9-3-1 and the third sludge discharge pipe 9-3-2 to detect the pressure of water inlet and sludge discharge.;

[0064] Specifically, as Figure 1 shown, the cutter head assembly 1 in the first section is located at the very front end of the pipe jacking machine. Then, there are successively connected a mud chamber assembly 2, a power system 8, a front cylinder assembly 3, and a first rear cylinder assembly 4. Among them, the cutter head assembly 1 is suitable for primary crushing in a composite formation and is the main working component of the pipe jacking machine. The mud chamber assembly 2 is used for secondary crushing of the formation and forming a slurry mixture to facilitate subsequent sludge discharge. The power system 8 is used to provide the power and torque required by the pipe jacking machine, driving the cutter head assembly 1 and the mud chamber assembly 2 to work. The power system 8 is an integral flange structure to ensure the sectional integration of the micro pipe jacking machine and the convenience of its assembly and maintenance. The front cylinder assembly 3 and the first rear cylinder assembly 4 are connected in cooperation with the deviation correction oil cylinder 10 to provide the deviation correction function and limit the rotation of the pipe jacking machine.

[0065] Specifically, as Figure 5As shown in the figure, the cutter head assembly 1 includes a cutter head plane 1-1, on which there are arranged edge inserted-tooth hob cutters 1-2, front inserted-tooth hob cutters 1-3 and single-edge scraping cutters 1-4. The cutter head assembly 1 also includes a cutter head outer ring rib 1-5, wear-resistant flow deflectors 1-6, torsion legs 1-7, crushing teeth 1-8, spiral mud deflectors 1-9, a cutter head taper sleeve 1-10 and an edge hob support 1-11. The cutter head plane 1-1 is the main part of the cutter head assembly 1 and is disc-shaped. There are two edge inserted-tooth hob cutters 1-2, symmetrically arranged on the edge of the cutter head plane 1-1. There are two front inserted-tooth hob cutters 1-3, symmetrically arranged on the upper surface of the cutter head plane 1-1. There are four single-edge scraping cutters 1-4, arranged on the cutter head plane 1-1 and distributed between the edge inserted-tooth hob cutters 1-2 and the front inserted-tooth hob cutters 1-3. The cutter head outer ring rib 1-5 surrounds the outer edge of the cutter head plane 1-1. A plurality of wear-resistant flow deflectors 1-6 are evenly distributed and welded on the outer edge surface of the cutter head outer ring rib 1-5. One end of the torsion leg 1-7 is welded to the cutter head plane 1-1, and the other end is welded to the cutter head taper sleeve 1-10. The cutter head taper sleeve 1-10 is coaxial with the cutter head plane 1-1 and is connected to the main shaft of the power system 8. The surface of the cutter head taper sleeve 1-10 is welded with a wear-resistant grid, which helps to extend the service life of the taper sleeve. A plurality of crushing teeth 1-8 are evenly distributed and welded on the outer cylindrical surface of the cutter head taper sleeve 1-10. The spiral mud deflector 1-9 is welded on the conical circular surface of the cutter head taper sleeve 1-10. The spiral mud deflector 1-9 spirally ascends, its lead is very large and it has the same taper as the cutter head taper sleeve 1-10. The front part of the spiral mud deflector 1-9 extends deep into the mud bin assembly 2.

[0066] Among them, the cutter head surface 1-1 is used to provide an installation foundation to support other cutter head components. During the tunneling process of the pipe jacking machine, the edge inserted tooth hob 1-2 first contacts the formation for preliminary crushing. The front inserted tooth hob 1-3 works in coordination with the edge inserted tooth hob to further crush the formation. The single-edge scraper 1-4 is used to scrape off the soil and gravel adhering to the cutter head surface 1-1 to keep the cutter head clean. The cutter head outer ring rib 1-5 is used to enhance the structural strength of the cutter head. The wear-resistant guide plate 1-6 is used to guide the flow of muddy water, reduce the erosion of the muddy water on the cutter head surface 1-1, and improve wear resistance. The torsion leg 1-7 is used to connect the cutter head surface 1-1 and the cutter head cone sleeve 1-10 and transmit torque. When the cutter head assembly 1 rotates, the crushing tooth 1-8 re-crushes the formation. When the moving cone of the cutter head rotates, the spiral mud guide plate 1-9 can quickly push and guide the mixed mud in the mud bin to the feeding and crushing tooth opening of the fixed cone. With the staggered shearing of the moving cone and the fixed cone, the mixed mud enters the mud bin for secondary crushing, greatly improving the crushing efficiency and enhancing the working efficiency of the pipe jacking machine. The cutter head cone sleeve 1-10 is connected to the power system 8 to achieve power transmission. It should be noted that both the cutter head cone sleeve 1-10 and the main shaft of the power system 8 have a taper of 6°. After the two cones are assembled together, the cutter head cone sleeve 1-10 and the main shaft of the power system 8 are tightly connected together with a blanking plate. The taper can eliminate the radial shear force and reduce the vibration generated by the secondary crushing of the cutter head. The edge hob support 1-11 is used to fix and support the edge inserted tooth hob to ensure its stable operation.

[0067] Specifically, as Figures 6 - 7 shown, the mud bin assembly 2 includes a mud bin cylinder body 2-1, a fixed cone crushing rib 2-2, a mud bin trumpet cone 2-3, a flange fixed cone crushing tooth 2-4, and a mud bin connection flange 2-5. The mud bin cylinder body 2-1 is the main part of the mud bin assembly 2. A plurality of mud bin trumpet cones 2-3 are arranged in the mud bin cylinder body 2-1. The plurality of mud bin trumpet cones 2-3 are welded together with the corresponding number of flange fixed cone crushing teeth 2-4. The plurality of fixed cone crushing ribs 2-2 are evenly distributed and welded on the inner surface of the mud bin trumpet cone 2-3. Among them, the mud bin cylinder body 2-1 bears the mixed mud and the crushing process in the mud bin, providing space for crushing and mud discharge. The mud bin trumpet cone 2-3 and the flange fixed cone crushing tooth 2-4 together form a crushing area to perform secondary crushing on the soil entering the mud bin, improving the crushing efficiency. The fixed cone crushing rib 2-2 is used to enhance the crushing effect and assist in the crushing and mixing of the soil. The mud bin connection flange 2-5 connects the mud bin assembly 2 with other components, such as the power system 8 and the front cylinder assembly 3, to ensure the connectivity and sealing of the muddy water system 9.

[0068] Specifically, as Figure 4 and Figure 7As shown in the figure, there are 3 through holes on the mud bin horn cone 2-3, one directly above, and one at each of the left and right 60°. A mud bin water box 9-1-1-1 is welded between the mud bin connecting flange 2-5 and the mud bin horn cone 2-3, so that a closed water tank is formed between the mud bin connecting flange 2-5, the mud bin horn cone 2-3 and the mud bin cylinder 2-1. An annular notch is opened on the outer circumferential surface of the flange fixed cone crushing tooth 2-4, and a through hole is drilled directly above the annular notch, and through holes are also drilled at the positions of 60° on the left and right. In this way, it cooperates with the 3 through holes opened on the mud bin horn cone 2-3 to jointly form 3 drainage ports 9-1-1-2, and the whole forms a front water supply assembly 9-1-1. When constructing in a stratum with sticky mud or a pebble stratum, the front water supply assembly 9-1-1 is opened. When the sticky mud passes through the flange fixed cone crushing tooth 2-4, under the pressure scouring of water and the thrust conveying of the spiral mud guiding plate 1-9, the sticky mud will not "paste up" or cake, and the slag discharge is smooth, thus ensuring the success rate of the micro pipe jacking machine construction and improving the work efficiency.

[0069] Specifically, as Figure 8As shown in the figure, the power spindle 8-1 is located at the forefront of the power system 8. A mud sealing cover 8-2, a power connection flange 8-3, a power housing 8-4, a speed reducer 8-5, and a hydraulic motor 8-6 are sequentially connected to the power spindle 8-1. The front part of the power spindle 8-1 is a conical structure, which is movably connected to the cutter head cone sleeve 1-10. The front part of the power connection flange 8-3 is connected to the mud bin connection flange 2-5, and the rear part is connected to the front cylinder connection flange 3-1. Drain ports, a front water supply port, and a rear water supply port are distributed on the power connection flange 8-3. One side of the above-mentioned front water supply port is connected to the front water supply component 9-1-1, and the other side is connected to the front water supply box 9-1-8 to form a front water supply passage. One side of the rear water supply port and the drain port leads directly to the mud bin cylinder 2-1. The other side of the rear water supply port is connected to the first rear water supply pipe 9-1-3, and the other side of the drain port is connected to the first drain pipe 9-1-4. The two plane surfaces of the power connection flange 8-3 are respectively sealed with O-rings to enhance the sealing performance after connection and are fixed by connection screws. There are bearings and a spindle that resist axial and radial shear forces inside the power housing 8-4. A speed reducer 8-5 and a hydraulic motor 8-6 are sequentially connected to the rear part. A first pressure sensor 8-7 is installed behind the power connection flange 8-3. Among them, the power spindle 8-1, as the output end of the power system 8, transmits the power generated by the hydraulic motor 8-6 to the cutter head assembly 1 to drive the cutter head assembly 1 to carry out earth-breaking operations. Its conical structure ensures the vibration and shear force of the spindle against radial loads, ensuring that the cutter head assembly 1 and the spindle are tightened more and more after being stressed, reducing and eliminating looseness. The mud sealing cover 8-2 is used to seal the front end of the power spindle 8-1 to prevent soil and impurities from entering the interior of the power system 8 and protect the internal components. The power connection flange 8-3 is used to connect the power system 8 and the mud bin assembly 2 and provide necessary drain ports and front and rear water supply ports to ensure the normal operation of the mud and water system 9. The small volume and reasonable structure of the power housing 8-4 ensure the feasibility of the design of the micro-tunneling machine. The speed reducer 8-5 can reduce the speed of the hydraulic motor 8-6 and increase the torque, enabling the power spindle 8-1 to output rotational power suitable for earth-breaking operations. The hydraulic motor 8-6, as the power source of the power system 8, provides rotational power to drive the entire tunneling machine forward. The first pressure sensor 8-7 is used to monitor the system pressure to ensure the stable operation of the power system 8.

[0070] Specifically, as Figures 9 - 10As shown, the front cylinder assembly 3 includes a front cylinder connecting flange 3-1, a first screw retaining ring 3-2, a front cylinder alignment support 3-3, a front cylinder observation window 3-4, a front cylinder barrel 3-5, and a rotation limiting seat 3-6. The front cylinder barrel 3-5 is the main body of the front cylinder assembly 3. The front cylinder connecting flange 3-1 is located at the foremost end of the front cylinder barrel 3-5. The front cylinder connecting flange 3-1 is connected to the power connecting flange 8-3 in the power system 8. There are front water supply, rear water supply, and mud discharge nozzles on the front cylinder connecting flange 3-1. There are three sealing grooves arranged on the outer circumferences of the above three nozzles for connection sealing with the front water supply port, rear water supply port, and mud discharge pipe in the power system 8. A plurality of front cylinder alignment supports 3-3 are welded inside the front cylinder barrel 3-5. The front cylinder observation window 3-4 is arranged on the outer surface of the front cylinder barrel 3-5, which is beneficial for installing and debugging the inclination and rotation angle instrument and for repairing and detecting the oil pipe nozzle of the alignment cylinder 10. It should be noted that the inclination and rotation angle instrument is a prior art in measuring instruments, with the model number COT330-15, which is used to monitor the inclination angle of the pipe jacking machine in real time to ensure the stability and safety during the pipe jacking operation. A rotation limiting seat 3-6 is welded at the upper end inside the front cylinder barrel 3-5 for cooperation with the rotation limiting pin 4-2 in the first rear cylinder to limit the rotation of the housing caused by alignment and deviation. Five first screw retaining rings 3-2 are arranged at the front end of the outer surface of the front cylinder barrel 3-5 for the connection and sealing between the front cylinder assembly 3 and the power connecting flange 8-1.

[0071] Specifically, as Figure 11 and Figure 12 shown, the first rear cylinder assembly 4 includes a first rear cylinder barrel 4-1, a rotation limiting pin 4-2, a first rear cylinder alignment support 4-3, and a support rib plate 4-4. The first rear cylinder barrel 4-1 is formed by machining an integral barrel. The rotation limiting pin 4-2 is welded at the upper part of the front end of the first rear cylinder assembly 4-1. The rotation limiting pin 4-2 cooperates with the rotation limiting seat 3-6. A plurality of first rear cylinder alignment supports 4-3 are welded on the inner wall of the first rear cylinder barrel 4-1. Support rib plates 4-4 are respectively welded behind the plurality of first rear cylinder alignment supports 4-3. The first rear cylinder alignment support 4-3 extends outside the first rear cylinder barrel 4-1 to ensure that the position of the alignment cylinder 10 is in front of the first rear cylinder barrel 4-1 after assembly, so as to avoid interference with the first rear cylinder barrel 4-1 during alignment, and at the same time, the alignment cylinder 10 is as close as possible to the front cylinder barrel 3-5 to make rational use of space. There are screw holes and positioning grooves arranged at the rear of the first rear cylinder barrel 4-1 for connecting the second rear cylinder assembly 5. In addition, a first quick-insert fixing plate 4-5 is welded on the rear side of the first rear cylinder barrel 4-1 to fix the quick-insert joints of the eight oil inlet and return pipes of the four alignment cylinders 10 in the first section.

[0072] Specifically, as Figure 13As shown, in order to adjust the attitude of the pipe jacking machine during jacking, a deviation rectifying oil cylinder 10 is further included. In this embodiment, four deviation rectifying oil cylinders 10 are provided and placed in the front cylinder assembly 3 and the first rear cylinder assembly 4. One end of the deviation rectifying oil cylinder 10 is fixedly connected to the front cylinder deviation rectifying support 3-3, and the other end is fixedly connected to the first rear cylinder deviation rectifying support 4-3. A micro valve group 6-7 hydraulic driving mechanism is arranged in the third rear cylinder assembly 6. It should be noted that the above micro valve group 6-7 adopts the existing technology of Hunan Shikai Technology Co., Ltd., with the model number DGJP-PUVU-8L2201. The micro valve group 6-7 is connected to the deviation rectifying oil cylinder 10 to control the four deviation rectifying oil cylinders 10, thereby adjusting the attitude of the pipe jacking machine during jacking. Built-in travel meters, with the model number MHTC-0050M-S05-A10-01, are respectively arranged in the four deviation rectifying oil cylinders 10 to detect the distance of the oil cylinder stroke and display it on the operation interface, so as to control the stroke of deviation rectification.

[0073] Specifically, as Figures 14 - 16 shown, the second rear cylinder assembly 5 includes a second rear cylinder body 5-1, a second rear cylinder front flange 5-2, a second rear cylinder rear flange 5-3, a second rear cylinder observation window 5-4, a second screw guard ring 5-5, and a second quick plug fixing plate 5-6. Five second screw guard rings 5-5 are evenly distributed at the front part of the second rear cylinder body 5-1 to ensure the connection with the first rear cylinder assembly 4. The second rear cylinder front flange 5-2 is connected to the second rear cylinder body 5-1 by screws and sealed with a sealing ring therebetween. The second rear cylinder rear flange 5-3 is located at the end of the second rear cylinder body 5-1. The second rear cylinder rear flange 5-3 is connected to the third rear cylinder assembly 6 by screws. Second rear cylinder observation windows 5-4 are opened on the left and right sides at the rear part of the second rear cylinder body 5-1 to facilitate maintenance and adjustment. The second quick plug fixing plate 5-6 is welded at the middle step position of the second rear cylinder rear flange 5-3. The common head of the quick plug at the front end of the hydraulic pipe is fixed to the second quick plug fixing plate 5-11 with screws and marked. When the housing needs to be separated, the quick plug male and female heads of the hydraulic pipe can be quickly separated, facilitating quick construction. When the housing needs to be combined together, first bring the mating surfaces close, and then quickly insert the marked quick plug female head and male head to achieve the quick connection of the hydraulic pipeline with the housing.

[0074] Specifically, as Figures 17 - 21As shown in the figure, the third rear cylinder assembly 6 includes a third front rear cylinder flange 6-1, a third rear cylinder barrel 6-2, a third rear rear cylinder flange 6-3, a third screw guard ring 6-4, a third rear cylinder observation window 6-5, an electrical box assembly 6-6, a micro valve group assembly 6-7, and a camera assembly 6-8. Among them, the third front rear cylinder flange 6-1 is located at the front end of the third rear cylinder barrel 6-2, the third rear rear cylinder flange 6-3 is located at the rear end of the third rear cylinder barrel 6-2. The third front rear cylinder flange 6-1 is connected to the second rear rear cylinder flange 5-3 by screws. The structure is pluggable and sealed with a sealing ring between them. The third rear rear cylinder flange 6-3 is connected to the fourth rear cylinder assembly 7 by screws. Its structure is a positioning table type and sealed with a sealing ring between them. A plurality of third screw guard rings 6-4 are welded to the front part of the third rear cylinder barrel 6-2 to ensure the connection with the second rear cylinder assembly 5. A third rear cylinder observation window 6-5 is opened on the left side of the rear part of the third rear cylinder barrel 6-2, which is used to facilitate the connection, maintenance and adjustment of the plug of the electrical box 6-6, and the installation and connection of the micro valve group 6-7. An electrical box assembly 6-6 and a micro valve group assembly 6-7 are installed inside the third rear cylinder barrel 6-2. The electrical box assembly 6-6 is fixed on the upper top inside the third rear cylinder barrel 6-2 to provide low-voltage electricity for the pipe jacking machine and control the cylinders of the deviation correction cylinder 10, the integrated mud valve 9-2-7, and the bypass valve 9-2-6. The camera assembly 6-8 is fixedly installed behind the third front rear cylinder flange 6-1. Two connecting cylinders (not marked in the figure) are arranged at the lower part of the panel of the third front rear cylinder flange 6-1 to movably connect the mud and water between the third rear cylinder assembly 6 and the second rear cylinder assembly 5. Three sealed movable joints are arranged inside the above-mentioned connecting cylinders. The above-mentioned movable joints are in a cylindrical through structure. The inside is through for water inlet and mud discharge. Three sealing grooves are evenly distributed on the outer cylindrical surface for installing O-rings, and are precisely matched with the inner walls of the two connecting cylinders to ensure their sealing.

[0075] Specifically, as Figures 22 - 24As shown in the figure, the electrical box assembly 6-6 includes an electrical box 6-6-1 and electrical box fixing lugs 6-6-2. A plurality of electrical box fixing lugs 6-6-2 are welded to the edge of the upper surface of the electrical box 6-6-1. The wiring port of the electrical box 6-6-1 is aligned with the third rear cylinder observation window 6-5. The micro valve group assembly 6-7 includes a micro valve group bracket 6-7-1, a micro valve group 6-7-2, and micro valve group fixing screws 6-7-3. The micro valve group 6-7-2 is fixed to the micro valve group bracket 6-7-1 with the micro valve group fixing screws 6-7-3. The micro valve group bracket 6-7-1 is welded to the cylinder wall below the third rear cylinder observation window 6-5. Therefore, the micro valve group 6-7-2 and the plug of the electrical box 6-6-1 can be assembled and repaired through the third rear cylinder observation window 6-5. The camera assembly 6-8 includes a camera bracket 6-8-1, a camera 6-8-2, camera fixing screws 6-8-3, and camera bracket fixing screws 6-8-4. The camera bracket 6-8-1 is fixed to the third rear cylinder front flange 6-1 with the camera bracket fixing screws 6-8-4. The camera 6-8-2 is fixed below the camera bracket 6-8-1 with the camera fixing screws 6-8-3.

[0076] Specifically, as Figure 25 shown, the fourth rear cylinder assembly 7 includes a fourth rear cylinder body 7-1, a fourth rear cylinder flange 7-2, a precision rolled thread steel 7-3, an anti-rotation pin 7-4, a water supply flange assembly 7-5, and a sludge discharge flange assembly 7-6. The fourth rear cylinder flange 7-2 is welded to the fourth rear cylinder body 7-1 as a whole. The fourth rear cylinder flange 7-2 is connected to the rear flange 6-3 of the third rear cylinder by screws. Two holes are provided on the fourth rear cylinder flange 7-2, and the water supply flange assembly 7-5 and the sludge discharge flange assembly 7-6 are arranged on both sides of the two holes respectively, and are connected to the socket of the water supply pipe 9-3-1 and the third sludge discharge pipe 9-3-2. Two anti-rotation pins 7-4 are symmetrically arranged on the rear side of the fourth rear cylinder flange 7-2. The two anti-rotation pins 7-4 are respectively connected to the water supply pipe 9-3-1 and the third sludge discharge pipe 9-3-2 to prevent the pipe from rotating during the jacking of the pipe jacking machine by using the weight of the cement pipe itself. A precision rolled thread steel 7-3 is welded above the anti-rotation pin 7-4, and when the pipe jacking fails, the pipe jacking machine can be pulled out. Specifically, during the jacking of the cement pipe, two precision rolled thread steels 7-3 and nuts of the same length as the cement pipe are provided in each cement pipe. During the jacking, the precision rolled thread steels 7-3 are connected section by section with nuts. When the pipe jacking fails, the pipe jacking machine can be pulled back to the working well from the hole by using the pipe jacking oil cylinder.

[0077] Specifically, as Figure 26 and Figure 27As shown in the figure, the target surface position assembly 11 of the pipe jacking machine is in the center of the tail of the first rear cylinder assembly 4 and is located at the rear of the first rear cylinder deviation correction support 4-3, which is used to correctly reflect the true position of the pipe jacking machine. The target surface position assembly 11 includes a target surface support plate 11-1, a target surface panel 11-2, a target surface pendulum needle 11-3 and a plumb bob 11-5. The target surface support plate 11-1 is fixed under the rotation limiting pin 4-2 by screws. The target surface panel 11-2 is fixed on the target surface support plate 11-1 by target surface fixing screws 11-6. The plumb bob 11-5 is movably fixed on the target surface panel 11-2 through a plumb bob shaft 11-4 and a plumb bob fixing nut 11-7. The plumb bob 11-5 can always maintain a vertical state. One end of the target surface pendulum needle 11-3 is a screw structure and can be directly screwed into the center of the side of the plumb bob 11-5 facing the tail of the pipe jacking machine. The target surface pendulum needle 11-3 always maintains a vertical state together with the plumb bob 11-5. When the inclination angle and rotation angle change during construction, it can be directly seen through the camera 6-8-2 whether the target surface pendulum needle 11-3 and the target surface panel 11-2 jointly maintain a vertical state, so as to determine whether the inclination angle and rotation angle of the equipment have changed.

[0078] The following is the working principle of the present invention.

[0079] 1. Preparation

[0080] Assemble the pipe jacking machine: Lower the first section into the well alone, and use the plug-and-play connection method to quickly assemble the second and third sections. Each section is not only butted by plugging and unplugging, but also locked with screws to ensure the stability of the connection. A sealing ring is set in the middle to play a sealing role. During the assembly process, connect the mud pipeline and the hydraulic oil pipeline to ensure the smooth operation of the mud system 9 and the power system 8.

[0081] Check the status of each system: Confirm whether the hydraulic motor 8-6, the reducer 8-5 and the power main shaft 8-1 in the power system 8 are operating normally and can provide sufficient torque and speed to drive the cutter head assembly 1 to work; Connect the movable inlet and outlet mud pipelines on the ground to the inlet and outlet mud ports of the pipe jacking machine, and check whether the mud system 9 is tightly connected and there is no leakage; Check and ensure that the wiring of the electrical box 6-6-1 and the micro valve group 6-7-2 is correct, and check whether the deviation correction cylinder 10 and its built-in travel meter are working properly to prepare for subsequent attitude adjustment.

[0082] 2. Start and jack

[0083] Start the power system 8: Start the hydraulic motor 8-6, reduce the rotational speed and increase the torque through the speed reducer 8-5, drive the power main shaft 8-1 to rotate, and then drive the cutter head assembly 1 to rotate. The edge inserted-tooth hob 1-2 and the face inserted-tooth hob 1-3 on the cutter head assembly 1 start to contact the formation for preliminary crushing. As the cutter head continues to rotate, the single-edge scraper 1-4 scrapes off the soil and gravel adhering to the cutter head surface 1-1 to keep the cutter head clean. The crushing teeth 1-8 crush the formation again. At the same time, the cutter head taper sleeve 1-10 is tightly connected to the power main shaft 8-1 to achieve torque transmission, and the 6° taper eliminates the radial shear force to reduce the vibration generated by secondary crushing.

[0084] Jacking: The pipe jacking machine gradually advances forward. The spiral mud guiding plate 1-9 pushes and diverts the crushed soil and gravel into the mud bin assembly 2. The mud bin horn cone 2-3 and the flange fixed cone crushing teeth 2-4 perform secondary crushing on the soil. Open the front water supply component 9-1-1, and introduce water flow through the front water supply pipes (the first front water supply pipe 9-1-2, the second front water supply pipe 9-2-1) to the flange fixed cone crushing teeth 2-4 of the mud bin assembly 2 for flushing. Supply water into the mud bin cylinder body 2-1 through the rear water supply pipes (the first rear water supply pipe 9-1-3, the second rear water supply pipe 9-2-2) to form a mud-water mixture, and discharge the mud-water mixture in the mud bin through the mud discharge pipes (the first mud discharge pipe 9-1-4, the second mud discharge pipe 9-2-3, the third mud discharge pipe 9-3-2).

[0085] 3. Attitude adjustment

[0086] Real-time monitoring: Utilize the natural vertical characteristic of the plumb bob 11-5 to align the target surface pendulum needle 11-3 with the scale line of the target surface panel 11-2 at the beginning, that is, adjust the inclination and rotation angle display to 0 when debugging the equipment at the beginning. Real-time monitor the attitude of the pipe jacking machine through the target surface position component 11. Determine whether the inclination and rotation angle of the equipment have changed by observing whether the target surface pendulum needle 11-3 is aligned with the scale line of the target surface panel 11-2. The camera component 6-8 transmits the construction image to the ground control room in real time to help the operator remotely monitor the construction situation.

[0087] Adjust the attitude: When the attitude of the pipe jacking machine deviates from the predetermined trajectory, the electrical box 6-6-1 can provide weak electricity and control signals to drive the micro valve group 6-7-2 to control the expansion and contraction of the four rectifying cylinders 10 to adjust the attitude of the pipe jacking machine. Detect the cylinder stroke through the built-in travel meter to ensure the accuracy of rectification. During the rectification process, the rectifying supports (the front cylinder rectifying support 3-3, the first rear cylinder rectifying support 4-3) between the front cylinder assembly 3 and the first rear cylinder assembly 4 and the rotation limit pin 4-2 cooperate to limit the rotation of the pipe jacking machine and ensure the accuracy of rectification.

[0088] 4. Continue construction

[0089] Continuous jacking: After a section of pipeline is jacked in place, quickly connect it to the subsequent pipeline to ensure a firm connection. After connecting the pipelines, continue the jacking operation and repeat the above attitude adjustment until the entire pipeline is laid. As the pipe jacking machine continuously jacks, the slurry system 9 continuously circulates the slurry to maintain the crushing effect and smooth sludge discharge. The pressure sensors 9-5 monitor the pressure of the inlet and outlet slurry to ensure the stable operation of the slurry system 9. According to different construction conditions, the integrated slurry valve 9-2-7 and the bypass valve 9-2-6 are used to adjust the switching of the front and rear water supplies in a timely manner. By rotating the integrated slurry valve 9-2-7 to different angles, the internal and external circulation modes can be flexibly switched to ensure smooth circulation or directional discharge of the slurry in the system. When the integrated slurry valve 9-2-7 is at 0°, the inlet and outlet water flow straight without interference; when rotated to 90°, it guides the inlet water to the sludge discharge pipe to achieve internal circulation. The bypass valve 9-2-6 precisely controls the flow direction of the front and rear water supplies according to construction requirements. In the 0° state, it can ensure that the water flow directly drives the rear water supply of the mud chamber to maintain balance, and at 90°, it guides the water flow to the front water supply of the flange fixed cone crushing teeth 2-4 to enhance the crushing efficiency. By flexibly using the control functions of the integrated slurry valve 9-2-7 and the bypass valve 9-2-6, combined with real-time pressure monitoring data, the operating parameters and construction strategies of the slurry system 9 are continuously optimized to improve construction efficiency, reduce construction costs and risks, and ensure the smooth progress of the entire pipe jacking project.

[0090] 5. Construction completion

[0091] When the entire pipeline is laid, stop the power system 8 and close the slurry system 9. Dismantle each section of the pipe jacking machine components, hoist them out of the working well in sequence, and perform cleaning and maintenance to prepare for the next construction.

[0092] The above has described in detail an embodiment of the present utility model, but the described content is only the preferred embodiment of the present utility model and cannot be considered as used to limit the scope of implementation of the present utility model. All equivalent changes and improvements made within the scope of the application of the present utility model shall still fall within the scope covered by the patent of the present utility model.

Claims

1. A liquid-driven sectionalized micro pipe jacking machine applicable to composite strata, characterized in that, It includes a first section, a second section and a third section, and the first section, the second section and the third section are connected by plug-in connection. Among them, the first section successively includes a cutter head assembly (1), a mud chamber assembly (2), a power system (8), a front cylinder assembly (3) and a first rear cylinder assembly (4). The cutter head assembly (1) is located at the very front end of the pipe jacking machine. The cutter head assembly (1) is connected to the mud chamber assembly (2) by plug-in connection. The power system (8) is movably connected to the cutter head assembly (1). The power system (8) is connected to the mud chamber assembly (2) and the front cylinder assembly (3) by plug-in connection. The first rear cylinder assembly (4) is movably connected to the front cylinder assembly (3); the second section includes a second rear cylinder assembly (5), and the second rear cylinder assembly (5) is connected to the first rear cylinder assembly (4) by plug-in connection; the third section includes a third rear cylinder assembly (6) and a fourth rear cylinder assembly (7). The third rear cylinder assembly (6) is connected to the second rear cylinder assembly (5) by plug-in connection. The fourth rear cylinder assembly (7) is fixedly connected to the third rear cylinder assembly (6), and it further includes a slurry system (9). The slurry system (9) is successively divided into a first slurry mechanism (9-1), a second slurry mechanism (9-2) and a third slurry mechanism (9-3) according to the sectional structure, and they are respectively integrated in the first section, the second section and the third section.

2. The liquid-driven segmented micro pipe jacking machine applicable to composite strata according to claim 1, characterized in that The cutter head assembly (1) includes a cutter head disk surface (1-1). A plurality of edge inserted tooth hob cutters (1-2), face inserted tooth hob cutters (1-3) and single-edge scraping cutters (1-4) are arranged on the cutter head disk surface (1-1). A cutter head outer ring rib (1-5) is surrounded on the outer edge of the cutter head disk surface (1-1). A plurality of wear-resistant flow guiding plates (1-6) are fixedly connected to the outer edge surface of the cutter head outer ring rib (1-5). A torsion leg (1-7) is fixedly connected to the cutter head disk surface (1-1). The other end of the torsion leg (1-7) is fixedly connected to a cutter head cone sleeve (1-10). The cutter head cone sleeve (1-10) is coaxial with the cutter head disk surface (1-1). The cutter head cone sleeve (1-10) is connected to the power system (8). A plurality of crushing teeth (1-8) are fixedly connected to the outer circular surface of the cutter head cone sleeve (1-10). A spiral mud guiding plate (1-9) is fixedly connected to the conical circular surface of the cutter head cone sleeve (1-10). The spiral mud guiding plate (1-9) spirally ascends. The spiral mud guiding plate (1-9) has the same taper as the cutter head cone sleeve (1-10). One end of the spiral mud guiding plate (1-9) extends deep into the mud chamber assembly (2).

3. The liquid-driven segmented micro pipe jacking machine applicable to composite strata according to claim 1, characterized in that, The mud bin assembly (2) includes a mud bin cylinder body (2-1) and a mud bin connecting flange (2-5). A plurality of mud bin horn cones (2-3) are arranged inside the mud bin cylinder body (2-1). The plurality of mud bin horn cones (2-3) are fixedly connected to a corresponding number of flange fixed cone crushing teeth (2-4). A plurality of fixed cone crushing ribs (2-2) are distributed and fixedly connected to the inner surface of the mud bin horn cone (2-3). One end of the mud bin connecting flange (2-5) is fixedly connected to the mud bin cylinder body (2-1), and the other end is connected to the power system (8).

4. The liquid-driven segmented micro pipe jacking machine applicable to composite strata according to claim 1, wherein The power system (8) includes a power main shaft (8-1). The power main shaft (8-1) is located at the forefront of the power system (8). A mud sealing cover (8-2), a power connecting flange (8-3), a power housing (8-4), a speed reducer (8-5), and a hydraulic motor (8-6) are sequentially connected to the power main shaft (8-1). One end of the power main shaft (8-1) is movably connected to the cutter head assembly (1). One end of the power connecting flange (8-3) is connected to the mud bin assembly (2), and the other end is connected to the front cylinder assembly (3). The power connecting flange (8-3) is provided with a mud discharge port, a front water supply port, and a rear water supply port. Bearings and a main shaft are arranged inside the power housing (8-4).

5. A liquid-driven segmented micro pipe jacking machine applicable to composite strata according to claim 1, characterized in that, The front cylinder assembly (3) includes a front cylinder connecting flange (3-1) and a front cylinder body (3-5). The front cylinder connecting flange (3-1) is installed at one end of the front cylinder body (3-5). The front cylinder connecting flange (3-1) is connected to the power system (8). A plurality of front cylinder alignment supports (3-3) are installed inside the front cylinder body (3-5). A rotation limiting seat (3-6) is fixedly connected to the upper end inside the front cylinder body (3-5). The first rear cylinder assembly (4) includes a first rear cylinder body (4-1). One end of the first rear cylinder body (4-1) is connected to the front cylinder body (3-5). A rotation limiting pin (4-2) is fixedly connected to the upper part of the front end of the first rear cylinder body (4-1). The rotation limiting pin (4-2) cooperates with the rotation limiting seat (3-6). A plurality of first rear cylinder alignment supports (4-3) are fixedly connected to the inner wall of the first rear cylinder body (4-1). Support rib plates (4-4) are welded behind the plurality of first rear cylinder alignment supports (4-3). The first rear cylinder alignment support (4-3) extends outside the first rear cylinder body (4-1).

6. The liquid-driven sectionalized micro pipe jacking machine applicable to composite strata according to claim 5, wherein, An alignment oil cylinder (10) is further included. A plurality of alignment oil cylinders (10) are arranged in the front cylinder assembly (3) and the first rear cylinder assembly (4). One end of the alignment oil cylinder (10) is fixedly connected to the front cylinder alignment support (3-3), and the other end of the alignment oil cylinder (10) is fixedly connected to the first rear cylinder alignment support (4-3).

7. The liquid-driven segmented micro pipe jacking machine applicable to composite strata according to claim 1, characterized in that, The second rear cylinder assembly (5) includes a second rear cylinder body (5-1), a second rear cylinder front flange (5-2), and a second rear cylinder rear flange (5-3). The second rear cylinder front flange (5-2) is fixedly connected to the second rear cylinder body (5-1). The second rear cylinder rear flange (5-3) is located at the end of the second rear cylinder body (5-1), and the second rear cylinder rear flange (5-3) is connected to the third rear cylinder assembly (6). The third rear cylinder assembly (6) includes a third rear cylinder front flange (6-1), a third rear cylinder body (6-2), and a third rear cylinder rear flange (6-3). The third rear cylinder front flange (6-1) is connected to one end of the third rear cylinder body (6-2), and the third rear cylinder rear flange (6-3) is connected to the other end of the third rear cylinder body (6-2). The third rear cylinder front flange (6-1) is connected to the second rear cylinder assembly (5). An electrical box assembly (6-6) and a micro valve group assembly (6-7) are installed inside the third rear cylinder body (6-2). The electrical box assembly (6-6) is fixed to the upper top inside the third rear cylinder body (6-2), and a camera assembly (6-8) is fixedly installed on one side of the third rear cylinder front flange (6-1).

8. A liquid-driven segmented micro pipe jacking machine applicable to composite strata according to claim 5, characterized in that, The fourth rear cylinder assembly (7) includes a fourth rear cylinder body (7-1), a fourth rear cylinder flange (7-2), a fine rolled threaded steel (7-3), an anti-rotation pin (7-4), a water supply flange assembly (7-5), and a sludge discharge flange assembly (7-6). The fourth rear cylinder flange (7-2) is fixedly connected to the fourth rear cylinder body (7-1). The fourth rear cylinder flange (7-2) is connected to the third rear cylinder assembly (6). Two holes are formed in the fourth rear cylinder flange (7-2), and the water supply flange assembly (7-5) and the sludge discharge flange assembly (7-6) are respectively arranged on both sides of the two holes. The anti-rotation pin (7-4) is arranged on the fourth rear cylinder flange (7-2), and the anti-rotation pin (7-4) is connected to the mud-water system (9). The fine rolled threaded steel (7-3) is fixedly connected to the anti-rotation pin (7-4).

9. The liquid-driven segmented micro pipe jacking machine applicable to composite strata according to claim 8, wherein, It further includes a target surface position assembly (11). The target surface position assembly (11) is located at the center of the tail of the first rear cylinder assembly (4), and the target surface position assembly (11) is located on one side of the first rear cylinder alignment support (4-3). The target surface position assembly (11) includes a target surface support plate (11-1), a target surface panel (11-2), a target surface pendulum needle (11-3), and a plumb bob (11-5). The target surface support plate (11-1) is fixed below the rotation limit pin (4-2). The target surface panel (11-2) is fixed on the target surface support plate (11-1). The plumb bob (11-5) is movably connected to the target surface panel (11-2), and the plumb bob (11-5) always maintains a vertical state. One end of the target surface pendulum needle (11-3) is a screw structure, and the target surface pendulum needle (11-3) is screwed into the center of the side of the plumb bob (11-5) facing the tail of the pipe jacking machine.

10. A liquid-driven segmented micro pipe jacking machine applicable to composite strata according to claim 3, characterized in that, The first slurry mechanism (9-1) includes a front water supply component (9-1-1), a first front water supply pipe (9-1-2), a first rear water supply pipe (9-1-3), a first sludge discharge pipe (9-1-4), a first slurry pipeline fixing plate (9-1-5), and a front water supply box (9-1-8). The first front water supply pipe (9-1-2), the first rear water supply pipe (9-1-3), and the first sludge discharge pipe (9-1-4) are connected to corresponding slurry telescopic pipes (9-1-6). A ball valve (9-1-7) is provided at the end of the slurry telescopic pipe (9-1-6). The slurry telescopic pipe (9-1-6) is movably fixed in the front cylinder component (3) through the first slurry pipeline fixing plate (9-1-5). The front water supply component (9-1-1) is connected to the front water supply box (9-1-8), and the front water supply box is arranged on the front cylinder component (3). The front water supply component (9-1-1) includes a mud bin water box (9-1-1-1) and a drain port (9-1-1-2). The mud bin water box (9-1-1-1) is fixedly connected between the mud bin connection flange (2-5) and the mud bin bell cone (2-3). A plurality of through holes are correspondingly formed on the outer circumferential surfaces of the mud bin bell cone (2-3) and the flange fixed cone crushing teeth (2-4), and the plurality of through holes constitute the drain port (9-1-1-2).

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