Torque split transmission type earth type pipe jacking machine

Abstract

The utility model provides a kind of torque shunt transmission type mud formula pipe jacking machine, is formed by excavator shell, main shaft seat, cutterhead, cutterhead main shaft and torque shunt speed reducer, torque shunt speed reducer is set in excavator shell second half, main shaft seat is set in excavator shell middle section;Cutterhead main shaft inside axis is equipped with screw conveyor shaft;The input shaft of torque shunt speed reducer is through shaft of speed reducer body, input shaft rear end is equipped with the joint of connecting drive drill rod, front end is connected with the rear end of screw conveyor shaft;The output shaft of torque shunt speed reducer is hollow shaft matched with cutterhead main shaft, output shaft is connected with the rear end of cutterhead main shaft;The utility model uses the speed reducer of torque shunt transmission type, can with low torque high speed drive screw conveyor shaft and high-speed rotation of soil screw rod, simultaneously with high torque drive cutterhead rotation, both guarantee that cutterhead has enough torque cutting broken front soil, can also guarantee the delivery efficiency of slag soil, avoid slag soil jam.

Description

Technical Field

[0001] This utility model belongs to the technical field of small-diameter pipe jacking machine, specifically relating to a torque-diverting transmission type soil-type pipe jacking machine. Background Technology

[0002] I. Traditional pipe jacking technology and equipment: Traditional pipe jacking technology involves using a pipe jacking machine to excavate in front of the pipeline, while a hydraulic jacking device pushes it from the rear. Excavation can be done using water circulation within the pipeline, known as "slurry pipe jacking," or mechanical methods for direct soil removal, known as "soil pipe jacking." The pipe jacking machine consists of two sections, front and rear. A hydraulic cylinder forces the axes of the front and rear sections to form an angle, thus achieving steering correction.

[0003] This traditional pipe jacking technology is very popular in the field of large-diameter pipe jacking where people can enter the interior. It has no obvious defects or pain points and can cover various geological conditions. Therefore, for large-diameter pipe jacking, traditional pipe jacking technology and traditional pipe jacking machines are the absolute mainstream technology and equipment.

[0004] The equipment used in traditional pipe jacking technology is a traditional pipe jacking machine. It mainly consists of two parts: the pipe jacking machine (also called the pipe jacking machine head) and the hydraulic jacking device. Its core technology lies primarily in the pipe jacking machine.

[0005] The tunnel boring machine consists of two main parts: the cutterhead and the machine body. The machine body has three main internal mechanisms: (1) a rotating mechanism that drives the cutterhead to rotate; (2) a correction mechanism that drives the front chamber to turn with the cutterhead; and (3) a soil discharge mechanism. For slurry tunnel boring machines, this is the mud inlet and outlet pipe and the control valve; for soil tunnel boring machines, this is the mechanical soil discharge mechanism.

[0006] II. Shortcomings of traditional pipe jacking technology and equipment in the field of micro-pipe jacking: Miniature pipe jacking refers to pipe jacking used for laying pipes with an inner diameter of 600mm or less, meaning that people cannot enter the pipes inside. Miniature pipe jacking machines that use traditional pipe jacking technology are called traditional miniature pipe jacking machines. These machines still use traditional pipe jacking technology, which has many drawbacks, the main ones of which are as follows: 1. High application risk Traditional pipe jacking machines have a relatively complex internal structure. This is not a problem for large-diameter pipe jacking machines, as personnel can enter and handle internal malfunctions. However, micro-pipe jacking machines still use this type of internal structure. If a malfunction occurs inside the machine during construction, it becomes very difficult to resolve, potentially leading to project failure. This poses a significant risk.

[0007] 2. High difficulty in steering control The torque of the cutterhead of a traditional tunnel boring machine is provided from inside the machine body, meaning that the reaction force of the cutterhead torque acts on the machine body. Because the mini tunnel boring machine is small and lightweight, the machine body is prone to reverse when the cutterhead encounters a sudden change in resistance, making it difficult to control the direction of deviation.

[0008] 3. The sludge discharge pipe is prone to clogging. Because of the limited internal space and complex structure of the micro pipe jacking machine, the diameter of the mud inlet and outlet pipes is restricted, so this type of micro pipe jacking machine is prone to mud discharge blockage, which is a very big pain point.

[0009] 4. High overall construction cost The "high overall construction cost" mentioned here does not necessarily refer to a high absolute value, but rather to an unreasonable cost relative to the established standards. (1) High equipment cost Because malfunctions are difficult to resolve, traditional miniature pipe jacking machines require extremely high reliability, which naturally increases their cost. For example, while Japanese products are globally recognized as the best traditional miniature pipe jacking machines, a single Japanese-made miniature pipe jacking machine can cost hundreds of millions of yen.

[0010] Moreover, traditional pipe jacking machines require one machine for each diameter. Therefore, to undertake pipe jacking of various diameters, it is necessary to purchase tunneling machines of various specifications. The most valuable part of a traditional pipe jacking machine is the tunneling machine itself, which requires a relatively large investment in equipment.

[0011] (2) High requirements for operators result in high labor costs.

[0012] (3) High cost of working shaft: Due to the long body of traditional micro pipe jacking machine, the diameter of the working shaft is usually not less than 3.5 meters, which results in a high cost.

[0013] III. Current Status of Small-Diameter Pipe Jacking Technology: In trenchless pipeline construction technology, compared to the mature directional drilling and large-diameter pipe jacking technologies, small-diameter pipe jacking technology is still an immature field. This is because, currently, multiple technologies coexist in the field of small-diameter pipe jacking, and these technologies all have different serious shortcomings. No single technology can cover the vast majority of engineering situations and geological conditions for small-diameter pipe jacking and has yet to become the mainstream technology.

[0014] Currently, the construction of small-diameter pipe jacking systems in China requires the following approaches: 1. The shortcomings of traditional micro-pipe jacking technology have been described above.

[0015] 2. Spiral pipe jacking technology has two major drawbacks: (1) The process is complex, the equipment is complex, and the efficiency is low. In addition to the main body of the jacking drilling rig and the pipe jacking machine head, this technology also requires the configuration of pilot rods, pilot drill bits, mud discharge casings, mud discharge augers and other equipment. It requires three processes: the first step is to guide the penetration; the second step is to push in the mud discharge casing and auger; the third step is to jack the pipe. The process and equipment are complex and the efficiency is low.

[0016] (2) Poor stratum adaptability; it can only be used for uniform soil and sand layers, and cannot cover hard strata, rock layers, strata containing pebbles and gravel, miscellaneous fill strata and water-rich sandy strata.

[0017] 3. The disadvantages of using horizontal directional drilling technology as an alternative are as follows: (1) The elevation accuracy of horizontal directional drilling pipe laying is difficult to meet the accuracy requirements of pipe jacking.

[0018] (2) It will produce a large amount of mud, which will affect the environment.

[0019] 4. Convert small pipes to large ones: replace pipes with diameters of 600mm or less with pipes with diameters of 800mm for pipe jacking.

[0020] IV. Overview: In the construction of urban stormwater and sewage pipe networks, small-diameter pipes account for a larger proportion. However, to date, there is no mature mainstream technology to rely on in this field, and no ideal pipe jacking machine is available. Most construction companies engaged in pipe jacking are afraid of the risks of small-diameter pipe jacking and directly abandon small-diameter pipe jacking business. Many projects that should have used pipe jacking have had to be changed to open excavation because they cannot find construction companies willing to undertake them. Utility Model Content

[0021] The purpose of this utility model is to provide a torque-splitting transmission type soil-type pipe jacking device. Addressing the technical problems raised in the background technology, it takes the "external drive" technical route as the innovation direction, and avoids and improves the defects of traditional micro pipe jacking technology and pipe jacking machines in principle: high risk, difficult operation, easy pipe blockage, and high overall construction cost. It completely solves the problem that there is no ideal technology and equipment available in the current micro pipe jacking field.

[0022] The specific technical solution adopted by this utility model is as follows: A torque-splitting drive type soil-jacking tunnel boring machine (TBM) comprises a TBM housing, a spindle seat, a cutterhead, a cutterhead spindle, and a torque-splitting reducer. The TBM housing is a cylindrical structure. The torque-splitting reducer is located in the rear half of the TBM housing, the spindle seat is located in the middle section of the TBM housing, and the front half of the TBM housing is a soil chamber. The cutterhead is located at the front end of the TBM housing. The rear end of the cutterhead spindle is mounted on the spindle seat, and the front end is connected to the cutterhead. The soil-facing surface of the cutterhead is provided with several carbide cutter blocks.

[0023] The cutter head spindle adopts a large-diameter hollow structure, with a spiral conveying shaft at the internal axis. The rear end of the spiral conveying shaft is mounted on the spindle seat. The spiral conveying shaft consists of a shaft body and spiral blades wrapped around the shaft body. The cutter head spindle has a soil inlet on the outer wall of the shaft section in the soil chamber.

[0024] The input shaft of the torque split reducer is a through shaft that runs through the reducer body. The rear end of the input shaft is provided with a connector for connecting the drive drill rod, and the front end is connected to the rear end of the spiral conveyor shaft. The output shaft of the torque split reducer is a hollow shaft that matches the cutter head spindle, and the output shaft is connected to the rear end of the cutter head spindle.

[0025] Preferably, the front end of the cutter head is provided with a hollow split joint, which is connected to the cutter head spindle.

[0026] Preferably, the back of the cutter head is provided with several blades extending into the soil chamber. The blades, along with the rotation of the cutter head, stir and break up the slag in the soil chamber, thereby preventing the slag entering the soil chamber from clumping.

[0027] Preferably, the connector at the rear end of the input shaft of the torque splitter reducer is an internal octagonal connector.

[0028] The method of using this utility model is as follows: The main body of the jacking drilling rig is installed and fixed in the working well. A pilot drill rod with a large diameter hollow structure of the same diameter as the cutterhead spindle is used to connect the pilot drill bit. After the pilot hole drilling is completed, the theodolite behind the main body of the jacking drilling rig and the optical target at the front end of the pilot drill rod are removed. In the working well, the soil discharge auger rods are connected one by one along the inner hole of the pilot drill rod until the soil discharge auger rods reach the receiving well. The diameter of the rod body of the soil discharge auger rod is the same as that of the auger conveying shaft, and the rod body is equipped with auger blades of the same specification as the auger conveying shaft.

[0029] The pipe jacking device of this utility model is hoisted into the working well and placed on the pipe bracket at the front of the main unit of the jacking drilling rig for connection. The front end of the spiral conveying shaft is connected to the rear end of the soil discharge spiral rod, and the split joint at the front end of the cutterhead is connected to the tail end of the pilot drill rod in the pilot hole. The main power head of the jacking drilling rig pushes the pipe jacking device forward into the soil layer.

[0030] The drive drill rod is placed inside a pipe section of equal length and hoisted into the working well together, then placed on the pipe support. The rear end of the drive drill rod is connected to the drive shaft of the main power head of the jacking drill rig, and the front end is connected to the connector at the rear end of the input shaft of the torque split reducer.

[0031] Then, start the floating top iron of the jacking drill rig to push the pipe section forward and tighten it.

[0032] The main drive shaft of the jacking drill rig rotates while jacking forward. The rotation uses a low torque, high-speed gear. The drive drill rod drives the input shaft of the torque split reducer to rotate. Through reduction and torque increase, the output shaft outputs a large torque at a low speed, driving the cutter head main shaft to rotate. This cuts and breaks up the soil in front, forming slag that enters the soil chamber and then enters the cutter head main shaft through the soil inlet. At the same time, the input shaft of the torque split reducer drives the screw conveyor shaft and the soil discharge screw to rotate at high speed, conveying the slag forward and discharging it from the receiving well.

[0033] After one pipe section is jacked up, continue jacking up pipe sections and drill rods according to the above steps. At the same time, remove the jacked-up pilot drill rod and soil removal auger rod in the receiving well until the entire pipeline laying operation is finally completed.

[0034] The technical effects achieved by this utility model are as follows: This utility model provides a torque-splitting transmission type soil-jacking tunnel boring machine with an extremely simple structure and greatly reduced technical risks. The drive mechanism is located outside the borehole, which basically eliminates the risk of system failures that cannot be resolved. This utility model adopts a torque-splitting transmission type reducer, which can drive the screw conveyor shaft and the soil discharge screw to rotate at high speed with low torque and high speed, while driving the cutter head to rotate with high torque. This ensures that the cutter head has sufficient torque to cut and break the soil in front, and also ensures the efficiency of soil discharge and avoids soil blockage.

[0035] This invention simplifies the structure of the tunnel boring machine head, greatly reducing equipment costs. One set of jacking drilling rig can be equipped with multiple tunnel boring machine heads of different specifications, thus achieving tunnel jacking operations adapted to different pipe diameters at a very low cost. At the same time, the tunnel boring machine head of this invention does not require a drive device or a separate mud inlet / outlet system, so the head length can be made shorter, and tunnel jacking operations can be completed with a smaller working shaft, further reducing the overall construction cost.

[0036] This utility model adopts a large-diameter hollow cutterhead spindle and pilot drill rod. Through the high-speed rotation of the spiral conveying shaft and the soil discharge spiral rod, the excavated soil is transported forward and discharged from the receiving well. This greatly simplifies the internal structure of the soil-type pipe jacking machine, resulting in high soil discharge efficiency and less clogging.

[0037] This invention provides driving force to the cutterhead through the main body of the jacking drill outside the hole, which is not limited by the space inside the hole. It can provide greater power, greatly improve construction efficiency, and meet the construction requirements of hard strata, rock strata, strata containing pebbles and gravels, miscellaneous fill strata and water-rich sandy strata, greatly improving the adaptability of strata.

[0038] This utility model takes the "external drive" technical route as its innovation direction, and avoids and improves the defects of traditional micro pipe jacking technology and pipe jacking machines in principle: high risk, difficult operation, easy pipe blockage, and high overall construction cost. It completely solves the problem that there is no ideal technology and equipment available in the current micro pipe jacking field. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of a torque-splitting transmission type soil-type pipe jacking tunneling device according to this utility model; Figure 2 This is a schematic diagram of the working process of pipe jacking tunneling according to the present invention.

[0040] The attached diagram lists the components represented by each number as follows: 1. Tunnel boring machine housing; 2. Spindle seat; 3. Cutterhead; 4. Cutterhead spindle; 5. Torque splitter reducer; 6. Soil chamber; 7. Alloy cutter blocks; 8. Screw conveyor shaft; 9. Shaft body; 10. Spiral blade; 11. Soil inlet; 12. Input shaft; 13. Internal octagonal joint; 14. Output shaft; 15. Diverter joint; 16. Blade; 17. Top thrust drilling rig main unit; 18. Pilot drill rod; 19. Soil discharge auger; 20. Rod body; 21. Pipe support; 22. Drive drill rod; 23. Pipe section. Detailed Implementation

[0041] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0042] Example 1: This embodiment provides a torque-splitting drive type soil-type pipe jacking machine, the structure of which consists of... Figure 1 As shown, the tunneling machine consists of a tunneling machine housing 1, a spindle seat 2, a cutterhead 3, a cutterhead spindle 4, and a torque splitter reducer 5. The tunneling machine housing 1 is a cylindrical structure. The torque splitter reducer 5 is located in the rear half of the tunneling machine housing 1. The spindle seat 2 is located in the middle section of the tunneling machine housing 1. The front half of the tunneling machine housing 1 is a soil chamber 6. The cutterhead 3 is located at the front end of the tunneling machine housing 1. The rear end of the cutterhead spindle 4 is located on the spindle seat 2, and the front end is connected to the cutterhead 3. The soil-facing surface of the cutterhead 3 is provided with several carbide cutter blocks 7.

[0043] The cutter head spindle 4 adopts a large-diameter hollow structure, with a spiral conveying shaft 8 at the inner core. The rear end of the spiral conveying shaft 8 is mounted on the spindle seat 2. The spiral conveying shaft 8 consists of a shaft body 9 and spiral blades 10 wrapped around the shaft body 9. The cutter head spindle 4 has a soil inlet 11 on the outer wall of the shaft section in the soil chamber 6.

[0044] The input shaft 12 of the torque split reducer 5 is a through shaft that passes through the reducer body. The rear end of the input shaft 12 is provided with an internal octagonal connector 13 for connecting the drive drill rod, and the front end is connected to the rear end of the spiral conveying shaft 8. The output shaft 14 of the torque split reducer 5 is a hollow shaft that matches the cutter head spindle 4, and the output shaft 14 is connected to the rear end of the cutter head spindle 4.

[0045] The cutter head 3 has a hollow split joint 15 at its front end, which is connected to the cutter head spindle 4; the back of the cutter head 3 has several blades 16 extending to the soil chamber.

[0046] The usage of this embodiment is as follows: The main body 17 of the jacking drill is installed and fixed in the working well. A pilot drill rod 18 with a large diameter hollow structure of the same diameter as the cutter head spindle 4 is used to connect the pilot drill bit. After the pilot hole drilling is completed, the theodolite behind the main body 17 of the jacking drill and the optical target at the front end of the pilot drill rod 18 are removed. In the working well, the soil discharge auger rods 19 are connected one by one along the inner hole of the pilot drill rod until the soil discharge auger rods 19 reach the receiving well. The rod body 20 of the soil discharge auger rod 19 has the same diameter as the shaft body 9 of the spiral conveying shaft 8. The rod body 20 is provided with spiral blades 10 of the same specification as the spiral conveying shaft 8.

[0047] The pipe jacking device of this utility model is hoisted into the working well and placed on the pipe bracket 21 at the front of the main body of the jacking drilling rig 17 for connection. The front end of the spiral conveying shaft 8 is connected to the rear end of the soil discharge spiral rod 19, and the split joint 15 at the front end of the cutterhead 3 is connected to the tail end of the pilot drill rod 18 in the pilot hole. The power head of the main body of the jacking drilling rig 17 is used to push the pipe jacking device forward into the soil layer.

[0048] The drive drill rod 22 is placed inside the pipe section 23 of the same length and hoisted into the working well together, and placed on the pipe bracket 21. The rear end of the drive drill rod 22 is connected to the drive shaft of the power head of the jacking drill rig 17, and the front end is connected to the inner octagonal connector 13 at the rear end of the input shaft 12 of the torque split reducer 5.

[0049] Then, start the floating top iron of the jacking drill rig 17 to push the pipe section 23 forward and insert it forward to tighten it.

[0050] The drive spindle of the jacking drill rig 17 rotates while jacking forward. The rotation adopts a low torque high speed gear. The drive drill rod 22 drives the input shaft 12 of the torque split reducer 5 to rotate. Through the reduction and torque increase, the output shaft 14 outputs a large torque and low speed to drive the cutter head spindle 4 to drive the cutter head 3 to rotate. The cutter head 3 is cut and broken to form slag that enters the soil chamber 6 and then enters the cutter head spindle 4 through the soil inlet 11. At the same time, the input shaft 12 of the torque split reducer 5 drives the screw conveyor shaft 8 and the soil discharge screw 19 to rotate at high speed, conveying the slag forward and discharging it from the receiving well.

[0051] After one pipe section is jacked up, continue jacking up pipe sections and drill rods according to the above steps. At the same time, remove the jacked-up pilot drill rod and soil removal auger rod in the receiving well until the entire pipeline laying operation is finally completed.

[0052] The technical effects achieved in this embodiment are as follows: This embodiment provides a torque-splitting drive type soil-jacking tunnel boring machine with an extremely simple structure and significantly reduced technical risks. The drive mechanism is located outside the borehole, which basically eliminates the risk of system failures that cannot be resolved. This utility model uses a torque-splitting drive type reducer, which can drive the screw conveyor shaft and the soil discharge screw to rotate at high speed with low torque and high speed, while simultaneously driving the cutter head to rotate with high torque. This ensures that the cutter head has sufficient torque to cut and break the soil in front, while also ensuring the efficiency of soil discharge and avoiding soil blockage.

[0053] This embodiment simplifies the structure of the tunnel boring machine head, greatly reducing the cost of the equipment. One set of jacking drilling rig main unit can be equipped with multiple tunnel boring machine heads of different specifications, thereby achieving tunnel jacking operations adapted to different pipe diameters at a very low cost. At the same time, the tunnel boring machine head of this utility model does not require a drive device or a separate mud inlet and outlet system. Therefore, the head length can be made shorter, and tunnel jacking operations can be completed with a smaller working shaft, further reducing the overall construction cost.

[0054] This embodiment uses a large-diameter hollow cutterhead spindle and pilot drill rod. The slag is transported forward and discharged from the receiving well through the high-speed rotation of the spiral conveying shaft and the soil discharge spiral rod. This greatly simplifies the internal structure of the soil-type pipe jacking machine, resulting in high soil discharge efficiency and less clogging.

[0055] In this embodiment, the main body of the jacking drill outside the hole provides driving force for the cutterhead, which is not limited by the space inside the hole. It can provide greater power, greatly improve construction efficiency, and cover the construction requirements of hard strata, rock strata, strata containing pebbles and gravels, miscellaneous fill strata and water-rich sandy strata, greatly improving the adaptability of strata.

[0056] This embodiment takes the "external drive" technical route as its innovative direction, and avoids and improves the defects of traditional micro pipe jacking technology and pipe jacking machines in principle: high risk, difficult operation, easy pipe blockage, and high overall construction cost. It completely solves the problem that there is no ideal technology and equipment available in the current micro pipe jacking field.

[0057] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A torque-splitting drive type soil-jacking pipe-jacking device, comprising a pipe-jacking device housing, a main shaft seat, a cutterhead, a cutterhead main shaft, and a torque-splitting reduction mechanism, wherein the pipe-jacking device housing is a cylindrical structure, characterized in that: The torque-splitting reducer is located in the rear half of the tunnel boring machine (TBM) housing, the main shaft seat is located in the middle section of the TBM housing, and the front half of the TBM housing is a soil chamber. The cutterhead is located at the front end of the TBM housing. The rear end of the cutterhead spindle is located on the main shaft seat, and its front end is connected to the cutterhead. The cutterhead's soil-facing surface is provided with several carbide cutter blocks. The cutterhead spindle adopts a large-diameter hollow structure, with a spiral conveying shaft at its internal center. The rear end of the spiral conveying shaft is located on the main shaft seat. The spiral conveying shaft consists of a shaft body and spiral blades encased in the shaft body. The cutterhead spindle has a soil inlet on the outer wall of the shaft section within the soil chamber. The input shaft of the torque-splitting reducer is a through shaft that passes through the reducer body. The rear end of the input shaft has a connector for connecting the drive drill rod, and its front end is connected to the rear end of the spiral conveying shaft. The output shaft of the torque-splitting reducer is a hollow shaft that matches the cutterhead spindle, and the output shaft is connected to the rear end of the cutterhead spindle.

2. The torque-splitting drive type soil-type pipe jacking machine according to claim 1, characterized in that: The front end of the cutter head is provided with a hollow split joint, which is connected to the cutter head spindle.

3. The torque-splitting drive type soil-type pipe jacking machine according to claim 1, characterized in that: The back of the cutterhead is provided with several blades that extend into the soil chamber.

4. A torque-splitting drive type soil-type pipe jacking machine according to claim 1, characterized in that: The connector at the rear end of the input shaft of the torque split reducer is an internal octagonal connector.

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