Pipeline reel-type high-level waste disposal pit excavation system

Abstract

The invention relates to the technical field of tunnel excavation construction equipment, and is a pipeline reeling type high-level radioactive waste disposal pit excavation system which is not available at present. The system is provided with a main operating device which can be moved and positioned in a tunnel and excavate vertically downwards, a pipeline reeling and unreeling reel, a power source, a hydraulic station and a control device. The pipeline is wound on the pipeline reeling and unreeling reel, the outer end of the pipeline is connected to an excavation head of the main operating device and rises and falls with the excavation head, the inner end of the oil pipe is connected to the control device and the hydraulic station in sequence through a pipeline rotary joint, and the inner end of the wire is connected to the control device and the power source in sequence through a circuit rotary joint; the main operating device is also provided with a pipe section and a pressing device for applying downward pressure to push the excavation head and the pipe section to move downwards, the outer wall of the pipe section is provided with a wiring groove for accommodating the pipeline, the excavation head is provided with an oblique channel for guiding the pipeline from the outer wall to the inner cavity, and the pipeline reeling and unreeling reel is driven by a driving motor to realize the reeling of the pipeline when the excavation head withdraws.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel excavation construction equipment, in particular to a pipeline reeling type high-level radioactive waste disposal pit excavation system. Background Art

[0002] High-level radioactive waste (abbreviated as HLW) has the characteristics of strong radioactivity, high toxicity and long half-life. Its final safe disposal is extremely difficult and faces a series of scientific, technological and engineering challenges. Whether HLW can be finally disposed of safely is a strategic issue related to the sustainable development of the nuclear industry and environmental protection. At present, it is generally believed that the technically feasible way to finally dispose of HLW is deep geological disposal, that is, burying HLW in a stable geological body within a depth range of 500m to 1000m. Such objects that need deep geological disposal include: high-level glass solid bodies, other types of high-level solid waste, α solid waste, heavy water reactor spent fuel, high-temperature gas-cooled reactor spent fuel and other spent fuel. Setting up a special disposal repository in an uninhabited area is a better solution, and vertical disposal of disposal objects is better than horizontal disposal.

[0003] The disposal repository includes a horizontal channel and a disposal pit extending vertically downward on the channel. A possible disposal pit size is 1.4m in diameter and 10m in depth. From the perspective of the long-term safety and stability of the disposal repository, the disposal pit requires high hole size accuracy and small excavation damage to the surrounding rock. The drilling and blasting method is difficult to control the hole accuracy and causes excessive damage to the surrounding rock, which makes it difficult to meet the disposal pit excavation requirements. Therefore, the international community generally adopts mechanical excavation to construct disposal pits. At present, Finland and Sweden have developed granite disposal pit excavation equipment, but the equipment has problems such as low excavation efficiency and poor slag discharge effect. In general, the equipment design and application are immature, the construction space of the disposal pit is limited and the surrounding rock strength is high, so high requirements are placed on the equipment's compact design, efficient rock breaking, efficient slag discharge, rapid assembly and mobility. At present, there is no mature rock breaking machinery that can meet the excavation requirements of the disposal pit.

[0004] The excavation equipment of the disposal pit can borrow the excavation principle of the tunnel shield machine, but due to the change from horizontal excavation to vertical excavation, except for the cutter head which has some similarities with the cutter head of an ordinary tunnel shield machine, the structural requirements of the rest of the excavation equipment are completely different. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a pipeline reeling type high-level radioactive waste disposal pit excavation system which is not available at present.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a pipeline reeling type high-level radioactive waste disposal pit excavation system, which has a main operating device that can move and be positioned at a certain position in the tunnel and perform vertical downward excavation, and also has a pipeline reeling reel, a power supply, a hydraulic station and a control device. The oil pipe and the wire are wound on the pipeline reeling reel, the outer ends of the oil pipe and the wire are connected to the excavation head of the main operating device and rise and fall with the excavation head, the inner end of the oil pipe is connected to the control device and the hydraulic station in turn through a pipeline rotary joint, and the inner end of the wire is connected to the control device and the power supply in turn through a circuit rotary joint;

[0007] The main working device also has a pipe segment and a downward pressure device for applying downward pressure to push the tunneling head and the stacked pipe segments downward. The outer wall of the pipe segment is provided with a wiring groove for accommodating oil pipes and wires. The tunneling head has an oblique channel for guiding the oil pipes and wires from the outer wall to the inner cavity. The wiring groove of the pipe segment stacked on the tunneling head corresponds to the oblique channel.

[0008] The pipeline reel is driven by a motor to reel in the pipeline when the tunneling head is withdrawn.

[0009] In order to ensure orderly retraction and release of the pipelines without stacking and entanglement, the pipeline retraction and release reel is provided with a plurality of reel grooves, and each oil pipe and conductor is arranged in a reel groove on the pipeline retraction and release reel.

[0010] A better approach is to have a groove width that is only slightly larger than the diameter of the stored pipeline. Since pipelines have different diameters and the same pipeline has different reel diameters, different rotation speeds are required for reeling pipelines of different diameters and the rotation speed of each reel is not constant. The pipeline reel is provided with a plurality of independently rotating reels, each oil pipe and conductor is arranged in an independent reel, and each independent reel is driven by a constant tension motor. The constant tension motor is a torque motor with a frequency converter, and the torque of the torque motor is selected according to the tension that each pipeline can bear.

[0011] Furthermore, a damper is provided on the shaft of each independently rotating reel to ensure stable rotation of the reel when the reel is unwinding. The damper may be a friction block clamped on the shaft. The friction block may be clamped on the shaft all the time, or may be driven by a driving device to be clamped on the shaft only when unwinding. Another option is that the friction block contacts the groove wall of the reel.

[0012] In order to protect the pipeline from being damaged by the pit wall and other objects, a detachable protective cover is provided at the notch of the pipe segment wiring trough.

[0013] Specifically, the wire is a power line and / or a signal control line.

[0014] Specifically, the main operating device is provided with guide wheels for the oil pipe and the conductor to guide the pipeline from the reel to the tunneling head.

[0015] The beneficial effects of the present invention are as follows: the pipeline retractable high-level radioactive waste disposal pit excavation system provided by the present invention mainly targets the power and control parts in the excavation system, and provides a structure for providing the required power and control to the moving excavation head during vertical excavation in a narrow working space, and a retractable structure for the power and control pipelines when the pipe segment is pressed down and withdrawn under this structure. The pipeline is located in the wiring groove on the outer wall of the pipe segment, and the pipe segment can be conveniently stacked and taken out. The pipeline reel and the rotary joint are used to realize the release and retraction of the pipeline when the excavation head is excavated and withdrawn. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the present invention;

[0017] Figure 2 A top view of the present invention;

[0018] Figure 3 It is a structural diagram of the tunneling head in the present invention;

[0019] Figure 4 It is a structural diagram of the pipe segment in the present invention.

[0020] In the figure, 1. main operating device, 2. pipeline reel, 3. power supply, 4. hydraulic station, 5. tunneling head, 5-1. inclined channel, 6. pipe section, 6-1. wiring trough, 7. pipe section storage device. DETAILED DESCRIPTION

[0021] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] As attached Figure 1 and 2 A pipeline reeling type high-level radioactive waste disposal pit excavation system has a main operating device 1 that can be moved and positioned at a certain position in the tunnel and perform vertical downward excavation, and also has a pipeline reel 2, a power supply 3, a hydraulic station 4 and a control device. The oil pipe and the wire are wound on the pipeline reel 2. The outer ends of the oil pipe and the wire are connected to the excavation head 5 of the main operating device 1 and rise and fall with the excavation head 5. The structure of the excavation head 5 is shown in the attached figure. Figure 3Generally, the cutter head of the tunneling head 5 is driven by a hydraulic motor, so it is necessary to connect the oil inlet pipe and the oil return pipe. The inner end of the oil pipe is connected to the control device and the hydraulic station 4 in sequence through the pipeline rotary joint. The tunneling head 5 is also provided with electrical devices such as sensors, so it is also necessary to connect the power line and / or the control line wire. The inner end of the wire is connected to the control device and the power supply 3 in sequence through the circuit rotary joint.

[0023] The main working device 1 also has a pipe segment 6 and a pressing device for applying downward pressure to push the tunneling head 5 and the stacked pipe segments 6 downward. The pressing device can be a pressing oil cylinder for pushing the tunneling head 5 and the pipe segment 6. Of course, the pressing device is converted into a lifting device when the tunneling head 5 withdraws and rises. The outer wall of the pipe segment 6 is provided with a wiring groove 6-1 for accommodating oil pipes and wires. Figure 4 The tunneling head 5 has an oblique channel 5-1 for guiding the oil pipe and the conductor from the outer wall to the inner cavity, and the wiring groove 6-1 of the pipe section 6 superimposed on the tunneling head 5 corresponds to the oblique channel 5-1;

[0024] The pipeline reel 2 is driven by a motor and a control device to realize forward and reverse rotation so as to realize reeling the pipeline when the tunneling head 5 is advancing and reeling the pipeline when the tunneling head 5 is withdrawing;

[0025] Attached Figure 1 and 2 Mainly shown are the power, pipeline retracting and releasing unit and pipe segment storage device 7 in the excavation system;

[0026] The pipeline reel 2 is provided with a plurality of reel grooves, each oil pipe and conductor is arranged in a reel groove on the pipeline reel 2, and the pipeline reel 2 is provided with a plurality of independently rotating reel grooves, each oil pipe and conductor is arranged in an independent reel groove, and each independent reel groove is driven by a constant tension motor;

[0027] The notch of the wiring slot 6-1 of the pipe section 6 is provided with a detachable protective cover;

[0028] The main operating device 1 is provided with guide wheels for the oil pipe and the conductor, which are not shown in the drawings and correspond to the upper part of the wiring groove 6-1.

[0029] The use of the present invention is as follows: the driving and control of the tunneling head 5 comes from devices other than the main operating device 1. These devices are connected to the tunneling head 5 by various pipelines. When tunneling begins, the pressing device only presses down the tunneling head 5. As the tunneling head 5 moves downward, the control device stops the driving motor of the reel and the dampers make each reel groove unwind stably. After stacking each pipe section 6, the pipeline is buried in the wiring groove 6-1 and covered with a protective cover. When the tunneling head 5 completes the tunneling and needs to be withdrawn, at this time, each stacked pipe section 6 is connected to the tunneling head 5. When the body is withdrawn, the pressing device is converted into a lifting device to lift all the pipe segments 6 and the tunneling head 5. When the top pipe segment 6 is lifted out of the tunneling entrance, the clamping device at the tunneling entrance clamps the second pipe segment 6 from the top to the bottom, removes the protective cover of the top pipe segment 6 and the wiring groove 6-1 of the pipe segment to separate the pipeline from the pipe segment 6, and the pipeline retracting and releasing reel 6 is actuated to transfer the pipe segment 6 at the same time. The lifting device then lifts the second pipe segment, repeats the above actions to take out each pipe segment 6, and lifts the tunneling head 5 away from the tunneling, thereby completing the operation of the tunnel.

[0030] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A pipeline reeling type high-level radioactive waste disposal pit excavation system, characterized by: A main operating device (1) is provided which can be moved and positioned at a certain position in a tunnel and which can perform vertical downward excavation, and further comprises a pipeline reel (2), a power source (3), a hydraulic station (4) and a control device. The oil pipe and the wire are wound on the pipeline reel (2). The outer ends of the oil pipe and the wire are connected to a tunneling head (5) of the main operating device (1) and are raised and lowered together with the tunneling head (5). The inner end of the oil pipe is connected to the control device and the hydraulic station (4) in sequence via a pipeline rotary joint. The inner end of the wire is connected to the control device and the power source (3) in sequence via a circuit rotary joint. The main operating device (1) also has a pipe segment (6) and a downward pressure device for applying downward pressure to push the tunneling head (5) and push the stacked pipe segments (6) downward, the outer wall of the pipe segment (6) is provided with a wiring groove (6-1) for accommodating oil pipes and wires, the tunneling head (5) has an oblique channel (5-1) for guiding the oil pipes and wires from the outer wall to the inner cavity, and the wiring groove (6-1) of the pipe segment (6) stacked on the tunneling head (5) corresponds to the oblique channel (5-1); The pipeline reel (2) is driven by a driving motor to reel in the pipeline when the tunneling head (5) is withdrawn; The notch of the wiring groove (6-1) of the pipe section (6) is provided with a detachable protective cover; The conductors are power lines and / or signal lines.

2. The pipeline reeling type high-level radioactive waste disposal pit excavation system according to claim 1 is characterized by: The pipeline reel (2) is provided with a plurality of reel grooves, and each oil pipe and conductor is arranged in a reel groove on the pipeline reel.

3. The pipeline reeling type high-level radioactive waste disposal pit excavation system according to claim 2 is characterized by: The pipeline reel (2) is provided with a plurality of independently rotating reel grooves, each oil pipe and conductor is arranged in an independent reel groove, and each independent reel groove is driven by a constant tension motor, and the constant tension motor is a torque motor with a frequency converter.

4. The pipeline reeling type high-level radioactive waste disposal pit excavation system according to claim 3 is characterized by: A damper is arranged on the shaft of each independently rotating reel to ensure stable rotation of the reel when the reel is unwinding.

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