Push-type tunneling slag-discharging pipe segment

Abstract

The present invention relates to the technical field of tunnel excavation construction equipment, and in particular to a push excavation slag-discharging type pipe segment, providing a pipe segment for advancing an excavation head that is applicable to vertical excavation equipment and is not currently available, the pipe segment having an annular cylindrical shell, at least two downwardly extending grooves being equally divided on the circumference of the upper end surface of the shell, corresponding to the lower part of the groove, a downwardly extending lifting ear that can be embedded in a groove provided on another pipe segment is provided on the lower end surface of the shell, coaxial first column pin holes are provided on two opposite side walls of the groove on the shell, and a second column pin hole corresponding to the first column pin hole of the pipe segment when the lifting ear is embedded in the groove of the other pipe segment is provided on the lifting ear; a slag-discharging pipe having the same axial direction as the shell is provided in the shell, an axial anti-rotation groove for circumferentially positioning the pipe segment on a frame of an excavator is provided on the outer wall of the shell; an axial wiring groove for leading out a pipeline for controlling a main cutter of the excavator is also provided on the outer wall of the shell.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel excavation construction equipment, in particular to a push excavation slag discharge type pipe segment. 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 for 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. A vertical excavation method also requires the use of pipe segments, but the pipe segments used for vertical excavation are almost completely different from those used for horizontal excavation in function and structure. At present, there are no publicly available pipe segments used for vertical tunnel boring machines. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a pipe segment suitable for vertical excavation equipment.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a push-driving slag-discharging type pipe segment, comprising an annular cylindrical shell, wherein at least two downwardly extending grooves are equally divided on the circumference of the upper end surface of the shell, and corresponding to the lower part of the groove, a downwardly extending ear which can be embedded in the groove provided on another pipe segment is provided on the lower end surface of the shell, and coaxial first column pin holes are provided on two opposite side walls of the groove on the shell, and a second column pin hole is provided on the ear which corresponds to the first column pin hole of the pipe segment when the ear is embedded in the groove of the other pipe segment.

[0007] The pipe segments of the above scheme are used to meet the needs of a vertical tunneling equipment that relies on pushing the pipe segments downward and then pushing the tunneling head for tunneling. The pipe segments need to be stacked on the tunneling head one by one. When the tunneling head withdraws upward, the pipe segments need to be separated and transferred one by one. The pipe segments are connected by grooves, lifting ears and pins. The use of pins makes the pipe segment connection and separation process quick and convenient.

[0008] In order to facilitate the operation of personnel when connecting and separating the pipe segments, the axes of the first pin hole and the second pin hole are perpendicular to the circumferential diameter line of the shell.

[0009] In order to facilitate the grabbing of the pipe segment and the processing of the first pin hole, a flat bottom groove is provided on the outer wall of the housing, and the opening outside the first pin hole is located on the bottom of the flat bottom groove, and the bottom of the groove is perpendicular to the axis of the first pin hole. The bottom of the groove is parallel to the diameter line of the pipe segment, which is conducive to the manipulator to close and clamp the pipe segment along the bottom of the groove.

[0010] The design sets the slag discharge channel of the excavation equipment in the pipe section, and adopts a vacuum slag suction method. A slag discharge pipe is provided in the shell in the same axial direction as the shell. The two ends of the slag discharge pipe are in a structure that can be sealed to each other so that the slag discharge pipes remain tightly connected when the two pipe sections are connected.

[0011] Specifically, in order to facilitate processing and connection between pipe sections and reliable connection of the slag discharge pipe on the pipe section, the axis of the slag discharge pipe is consistent with the axis of the shell, and connecting ribs are provided between the outer wall of the slag discharge pipe and the inner wall of the shell.

[0012] Due to the reaction force of the rotating tunneling head, the pipe segment needs to transmit the rotational torque to the frame, and the outer wall of the shell is provided with an axial anti-rotation groove for circumferentially positioning the pipe segment on the tunneling machine frame.

[0013] Since the pipe segments are stacked and separated, and the tunneling head at the lowest end has pipelines that need to be connected to external power and control devices, which may include electrical wires, signal wires, oil pipes and air pipes, an axial wiring groove for leading out the pipeline for controlling the main cutter of the tunneling machine is also provided on the outer wall of the shell, and a removable protective cover is provided on the notch of the wiring groove.

[0014] The beneficial effects of the present invention are as follows: the push-type tunneling and slag-discharging pipe segment provided by the present invention is an important component repeatedly used by a tunneling machine. The downward pressure can be transmitted to the tunneling head through the pipe segment. The use of the lifting lug makes the pipe segment convenient to connect and can better transmit the torque. The lifting lug can also play a positioning role during the transfer of the pipe segment. The flat-bottomed groove helps to plug and pull out the connecting pin and can also serve as a gripping part of the pipe segment. Only a simple protrusion needs to be set on the frame in combination with the anti-rotation groove of the pipe segment to transmit the torque of the tunneling head to the frame. The pipe segment is also provided with a slag discharge pipe so as to have a slag discharge function. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional diagram of a pipe segment of the present invention;

[0016] Figure 2 It is a cross-sectional view of the pipe section of the present invention along the axis;

[0017] Figure 3 It is a top view of the pipe section of the present invention.

[0018] In the figure, 1, shell, 2, groove, 3, lifting ear, 4, first column pin hole, 5, second column pin hole, 6, flat bottom groove, 7, slag discharge pipe, 8, connecting rib, 9, anti-rotation groove, 10, wiring groove, 11, protective cover. DETAILED DESCRIPTION

[0019] 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.

[0020] Combined with Figure 1 , 2 A push-driving slag-discharging pipe segment of the present invention has an annular cylindrical shell 1, and two grooves 2 extending downward are equally divided on the circumference of the upper end surface of the shell 1. Corresponding to the lower part of the groove 2, two lifting ears 3 extending downward and capable of being embedded in the groove of another pipe segment are provided on the lower end surface of the shell 1. The two opposite side walls of the groove 2 on the shell 1 are provided with coaxial first column pin holes 4, and the lifting ears 3 are provided with second column pin holes 5 corresponding to the first column pin holes of the pipe segment when the lifting ears 3 are embedded in the groove of another pipe segment. Such lifting ears can also be used as guide blocks when the pipe segment is transferred, and combined with the guide groove, the state of the pipe segment can be kept unchanged during the transfer.

[0021] The axes of the first pin hole 4 and the second pin hole 5 are both perpendicular to the circumferential diameter line of the housing 1. The circumferential diameter line is a diameter line among the diameter lines of the housing 1 that can perpendicularly intersect the axes of the pin holes.

[0022] A flat bottom groove 6 is provided on the outer wall of the housing 1, and the opening outside the first pin hole 4 is located on the bottom of the flat bottom groove 6, and the bottom of the groove is perpendicular to the axis of the first pin hole 4. There may be many ways to transfer the pipe segment, such as moving on a slide rail or using a manipulator to grab and move, and the flat bottom groove 6 can also serve as a clamping part during grabbing, and the manipulator can extend into the flat bottom groove 6 to grab the pipe segment.

[0023] A slag discharge pipe 7 having the same axial direction as the shell 1 is provided in the shell 1. The two ends of the slag discharge pipe 7 are in a mutually sealable structure so that the slag discharge pipes remain tightly connected when the two pipe sections are connected up and down. A replaceable rubber sealing ring with mutually conical surfaces meshing can be provided at the two ends. One rubber ring has a convex frustum surface, and the other rubber ring has a concave frustum surface. The axis of the slag discharge pipe 7 is consistent with the axis of the shell 1, and a connecting rib 8 is provided between the outer wall of the slag discharge pipe 7 and the inner wall of the shell 1.

[0024] The outer wall of the housing 1 is provided with axial anti-rotation grooves 9 for circumferentially positioning the pipe segment on the frame of the tunnel boring machine. There are four anti-rotation grooves 9 distributed on the circumference.

[0025] An axial wiring groove 10 for leading out the pipeline for controlling the main cutter of the tunnel boring machine is also provided on the outer wall of the housing 1 , and a detachable protective cover 11 is provided on the notch of the wiring groove 10 .

[0026] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. 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 scopes, for example, the ear is set on the upper end surface and the groove is set on the lower end surface. Therefore, in summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A push-drilling and slag-discharging pipe segment, characterized by: A ring-shaped cylindrical shell (1) is provided, on the upper end surface of the shell (1), at least two grooves (2) extending downward are equally divided on the circumference, and corresponding to the lower part of the groove (2), a lifting ear (3) extending downward and capable of being inserted into the groove of another pipe section is provided on the lower end surface of the shell (1), and the first coaxial pin hole (4) is provided on the two opposite side walls of the groove (2) on the shell (1), and the lifting ear (3) is provided with a second pin hole (5) corresponding to the first pin hole of the pipe section when the lifting ear (3) is inserted into the groove of the other pipe section; The axes of the first pin hole (4) and the second pin hole (5) are perpendicular to the circumferential diameter line of the housing (1); A slag discharge pipe (7) is provided in the shell (1) in the same axial direction as the shell (1), and the two ends of the slag discharge pipe (7) are in a mutually sealable structure such that the slag discharge pipes remain in a sealed connection when two pipe sections are connected up and down.

2. The push-drilling and slag-discharging pipe segment according to claim 1 is characterized in that: A flat bottom groove (6) is provided on the outer wall of the housing (1), and the opening outside the first pin hole (4) is located on the bottom of the flat bottom groove (6), and the bottom of the groove is perpendicular to the axis of the first pin hole (4).

3. The push-drilling and slag-discharging pipe segment according to claim 1 is characterized in that: The axis of the slag discharge pipe (7) is consistent with the axis of the shell (1), and connecting ribs (8) are provided between the outer wall of the slag discharge pipe (7) and the inner wall of the shell (1).

4. The push-drilling and slag-discharging pipe segment according to claim 1 is characterized in that: An axial anti-rotation groove (9) for circumferentially positioning the pipe segment on the frame of the tunnel boring machine is provided on the outer wall of the housing (1).

5. The push-drilling and slag-discharging pipe segment according to claim 1 is characterized in that: The outer wall of the housing (1) is also provided with an axial wiring groove (10) for leading out a pipeline for controlling the main cutter of the tunnel boring machine, and a detachable protective cover (11) is provided on the notch of the wiring groove (10).

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