Shield body assembly and heading machine

Abstract

The invention belongs to the technical field of tunneling equipment, and particularly provides a shield body assembly and a tunneling machine. The shield body assembly comprises a shield body, a walking supporting mechanism is installed on the shield body, the walking supporting mechanism has set supporting spans in the front-back direction and the left-right direction, the walking supporting mechanism comprises telescopic supporting legs and a walking mechanism installed at the telescopic output ends of the telescopic supporting legs, and an independent containing groove used for containing the walking mechanism is formed in the shield body. After the telescopic supporting leg retracts, the walking mechanism can be completely contained in the containing groove. The heading machine comprises the shield body assembly. The walking supporting mechanism is additionally arranged on the shield body, during normal excavation and tunneling, the telescopic supporting leg retracts to enable the walking mechanism to be contained in the groove, and normal tunneling operation is not affected. After tunneling of a section of tunnel is completed, the telescopic supporting legs extend outwards, the walking mechanism is pushed out of the containing groove, and the walking mechanism can move along a related structure laid outside the tunnel to drive the main machine to achieve rapid transition.

Description

Technical Field

[0001] The invention belongs to the technical field of tunneling equipment, and in particular relates to a shield assembly and a tunneling machine. Background Art

[0002] As a construction equipment for underground tunnel excavation, tunnel boring machines (TBMs) are widely used in the construction of urban subways, highways, railways, water diversion tunnels and other projects. With the continuous expansion of the application field of tunnel boring machines, the tunnels of some projects have the characteristics of short distance, multiple chambers, and high water pressure. For example, for geology with high water pressure, slurry shield machines can be used for construction. The characteristics of short distance and multiple chambers determine that the tunnel boring machine will frequently transfer during the construction process, and the efficiency of the transfer directly affects the overall construction efficiency of the project.

[0003] In the related prior art, the patent with the authorization announcement number CN210370640U discloses a device for fast passing of the whole shield machine, which includes two roller groups, which are respectively used to be installed on the front shield and the middle shield after the shield machine exits the tunnel. After that, the shield machine can walk along the laid track and move to the next construction position, so that the main machine can pass the station without dismantling the machine. However, after the shield machine exits the tunnel, the roller group needs to be installed on site. Due to the heavy weight of the shield machine, a bracket needs to be used when installing the roller group, which is not easy to operate on the construction site. This process will also take a certain amount of time, affecting the overall construction efficiency and construction period. Summary of the invention

[0004] The object of the present invention is to provide a shield assembly to solve the technical problem of low transfer efficiency of a tunnel boring machine in the prior art. The object of the present invention is also to provide a tunnel boring machine to solve the same technical problem.

[0005] To achieve the above purpose, the technical solution of the shield assembly provided by the present invention is: A shield assembly comprises a shield body, on which a walking support mechanism is mounted, the walking support mechanism having a set support span in the front-back and left-right directions, the walking support mechanism comprising a telescopic support leg and a walking mechanism mounted at the telescopic output end of the telescopic support leg, and an independent accommodating groove for accommodating the walking mechanism is provided on the shield body, so that after the telescopic support leg is retracted, the walking mechanism can be completely accommodated in the accommodating groove.

[0006] As a further improvement, the shield body includes a front shield and a middle shield, and the front shield and the middle shield are each provided with at least one of the telescopic legs.

[0007] As a further improvement, the front shield is provided with two telescopic legs spaced apart on the left and right, and each telescopic leg is installed with a walking mechanism. The space between the two telescopic legs forms an equipment avoidance space for avoiding the slag or slurry discharge equipment installed at the center of the bottom of the front shield.

[0008] As a further improvement, the two telescopic legs on the front shield extend radially along the shield body and are arranged in an "eight" shape.

[0009] As a further improvement, two telescopic legs spaced apart from each other are provided on the middle shield, each telescopic leg is respectively installed with a walking mechanism, and in the vertical projection, the installation position of the two telescopic legs coincides with the M-shaped beam of the middle shield.

[0010] As a further improvement, the two telescopic legs on the middle shield extend radially along the shield body and are arranged in an "eight" shape.

[0011] As a further improvement, the shield body is further provided with a detachable cover plate, which is used to be connected to the opening of the receiving slot to protect the walking mechanism received in the receiving slot.

[0012] As a further improvement, the traveling mechanism is a wheeled traveling mechanism including a wheel frame and traveling wheels.

[0013] The present invention is an improved invention, and its beneficial effects are: a walking support mechanism is added to the shield body, and during normal excavation and digging, the retracted telescopic legs can be retracted to allow the walking mechanism to be accommodated in the groove, without affecting the normal excavation operation. After completing the excavation of a section of the tunnel, when it is necessary to transfer, the telescopic legs are extended outward to push the walking mechanism out of the accommodating groove, and the walking mechanism can move along the relevant structures laid outside the tunnel, and support and drive the main machine to achieve rapid transfer. After analysis, it can be seen that the present invention does not need to install a walking mechanism separately outside the tunnel, which improves the transfer efficiency.

[0014] To achieve the above object, the technical solution of the tunnel boring machine provided by the present invention is: A tunnel boring machine comprises a main machine and a rear supporting system, wherein the rear supporting system comprises a plurality of trailers connected in sequence front and rear, the main machine comprises a shield assembly, the shield assembly comprises a shield body, a walking support mechanism is mounted on the shield body, the walking support mechanism has a set support span in the front and rear and left and right directions, the walking support mechanism comprises a telescopic support leg and a walking mechanism mounted at the telescopic output end of the telescopic support leg, and an independent accommodating groove for accommodating the walking mechanism is provided on the shield body, so that the walking mechanism can be completely accommodated in the accommodating groove after the telescopic support leg is retracted.

[0015] As a further improvement, the shield body includes a front shield and a middle shield, and the front shield and the middle shield are each provided with at least one of the telescopic legs.

[0016] As a further improvement, the front shield is provided with two telescopic legs spaced apart on the left and right, and each telescopic leg is installed with a walking mechanism. The space between the two telescopic legs forms an equipment avoidance space for avoiding the slag or slurry discharge equipment installed at the center of the bottom of the front shield.

[0017] As a further improvement, the two telescopic legs on the front shield extend radially along the shield body and are arranged in an "eight" shape.

[0018] As a further improvement, two telescopic legs spaced apart from each other are provided on the middle shield, each telescopic leg is respectively installed with a walking mechanism, and in the vertical projection, the installation position of the two telescopic legs coincides with the M-shaped beam of the middle shield.

[0019] As a further improvement, the two telescopic legs on the middle shield extend radially along the shield body and are arranged in an "eight" shape.

[0020] As a further improvement, the shield body is further provided with a detachable cover plate, which is used to be connected to the opening of the receiving slot to protect the walking mechanism received in the receiving slot.

[0021] As a further improvement, the traveling mechanism is a wheeled traveling mechanism including a wheel frame and traveling wheels.

[0022] As a further improvement, the tunnel boring machine is a slurry shield machine, one of the trailers is provided with a slurry making device, the slurry making device has a slurry inlet for connecting to a slurry inlet pipeline, a slurry discharge port for connecting to a slurry discharge pipeline and a slag discharge port for discharging slag outward.

[0023] The present invention is an improved invention, and its beneficial effects are: a walking support mechanism is added to the shield body, and during normal excavation and digging, the retracted telescopic legs can be retracted to allow the walking mechanism to be accommodated in the groove, without affecting the normal excavation operation. After completing the excavation of a section of the tunnel, when it is necessary to transfer, the telescopic legs are extended outward to push the walking mechanism out of the accommodating groove, and the walking mechanism can move along the relevant structures laid outside the tunnel, and support and drive the main machine to achieve rapid transfer. After analysis, it can be seen that the present invention does not need to install a walking mechanism separately outside the tunnel, which improves the transfer efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an embodiment of a shield assembly in the present invention; Figure 2 A schematic diagram (front view) of an embodiment of a roadheader in the present invention during normal excavation; Figure 3 for Figure 2 Partial schematic diagram of the central mainframe position (telescopic legs retracted); Figure 4 for Figure 2 Partial schematic diagram of the center mainframe position (telescopic legs extended); Figure 5 for Figure 2 Cross-section of the mid-front shield (with telescopic legs retracted); Figure 6 for Figure 2Cross-sectional view of the Zhongzhongdun (with telescopic legs retracted); Figure 7 for Figure 2 Cross-section of the mid-front shield (with telescopic legs extended); Figure 8 for Figure 2 Cross-section view of the Zhongzhongdun (with telescopic legs extended); Fig. 9 for Figure 2 A cutaway view of the trailer.

[0025] Description of reference numerals: 1. Cutterhead; 2. Front shield; 3. Middle shield; 4. M-beam; 5. Tail shield; 6. Slurry discharge pipeline; 7. Slurry inlet pipeline; 8. Electric control cabinet; 9. Trailer; 901, Trailer running wheel; 10. Slurry making device; 11. Slag discharge port; 12. Segment assembly machine; 13. Telescopic legs; 14. Traveling mechanism. DETAILED DESCRIPTION

[0026] In order to facilitate the transfer of tunnel boring machines (shield machines, TBMs) and improve construction efficiency, the basic technical concept of the present invention is to install a walking support mechanism on the shield body that can support the shield body and walk along the paved "road surface". After completing the excavation of a section of the tunnel, it can be directly transferred to the next starting point. At the same time, the walking support mechanism cannot affect the normal excavation of the tunnel boring machine. For this reason, an independent receiving groove is provided on the shield body. During normal excavation, the walking support mechanism needs to be accommodated in the receiving groove. Most basically, the walking support mechanism needs to be equipped with retractable legs and a walking mechanism installed on the legs, so that the walking mechanism can be retracted into the receiving groove and extended out of the receiving groove by controlling the extension and retraction of the legs.

[0027] Based on the above technical concept, the present invention is further described in detail below in conjunction with embodiments.

[0028] The specific embodiment of the tunnel boring machine provided by the present invention is as follows: Here we first take the slurry shield machine as an example. Figure 2 As shown, the slurry shield machine provided in this embodiment includes a main machine and a rear supporting system. The main machine includes a cutter head 1, a shield body, a segment assembler 12, etc. The shield body is equipped with a main drive, a propulsion cylinder, and a main beam for installing the segment assembler 12. The specific excavation principle is the existing technology and will not be repeated here. The rear supporting system includes a plurality of trailers 9 connected in sequence front and back (due to space limitations, only two trailers 9 are shown in the figure). The trailers 9 are equipped with supporting equipment required for the excavation process, such as an electric control cabinet 8, a hydraulic pump station, etc. Among them, the trailer 9 is a wheeled trailer 9, specifically including a frame and trailer travel wheels 901 installed on the frame, such as Figure 2 and Fig. 9As shown, the trailer running wheels 901 can be configured to run directly along the tunnel wall, and the trailer running wheels 901 on the left and right sides of the trailer 9 are arranged in an "eight" shape. Since the trailer 9 is equipped with the trailer running wheels 901, after the construction is completed, the trailer 9 and the host are disconnected and the trailer 9 can be directly dragged to transfer.

[0029] It should be emphasized here that for the shield machine, its front-to-back direction and left-to-right direction are very clear and undisputed. The front-to-back direction refers to the excavation direction, with the end where the cutterhead 1 is located as the front end. The left-to-right direction refers to the horizontal direction, that is, Fig. 9 The left and right direction in .

[0030] In this embodiment, a walking support mechanism is installed on the shield body, and the walking support mechanism refers to a mechanism that can support the shield body (including related devices installed on the shield body) and walk along the paved "road surface". Therefore, the walking support mechanism should have a set support span in the front and back and left and right directions, that is, the walking support mechanism can contact the road surface at more than three points. The "road surface" here is to facilitate understanding of the role of the walking support mechanism, which includes the road surface formed by the track, the plane paved on the ground, and the curved road surface, etc.

[0031] Specifically, Figure 1-Figure 8 As shown, the walking support mechanism includes a telescopic leg 13 and a walking mechanism 14 installed at the telescopic output end of the telescopic leg 13. The telescopic leg 13 preferably adopts a hydraulic leg. The telescopic leg 13 can drive the walking mechanism 14 to move. An independent receiving groove for accommodating the walking mechanism 14 is provided on the shield body. The position of the receiving groove is independent and is only used to accommodate the walking mechanism 14, and does not interfere with the normal arrangement and operation of other devices. In the normal excavation process, Figure 3 As shown, the telescopic legs 13 are retracted, and the walking mechanism 14 is completely accommodated in the accommodating groove. When the excavation is completed and the site needs to be transferred, as shown in FIG. Figure 4 As shown, the telescopic legs 13 are extended, and the walking mechanism 14 is moved out of the receiving groove to support the paved "road surface" to achieve rapid transfer of the main machine.

[0032] For a slurry shield machine, the shield body includes a front shield 2 and a middle shield 3. Those skilled in the art understand that the front shield 2 refers to the front section of the shield body, and the middle shield 3 refers to the middle section of the shield body. The main drive is installed on the front shield 2. The middle shield 3 includes a peripheral outer shell and a M-beam 4 inside the outer shell. The main beam supporting the segment assembly machine 12 is connected to the rear end of the M-beam 4.

[0033] In a preferred embodiment, in order to improve the stability of the shield supported by the walking support mechanism, Figure 3 and Figure 4As shown, the front shield 2 and the middle shield 3 are both provided with telescopic legs 13, and there is at least one telescopic leg 13 on the front shield 2 and the middle shield 3. In this way, the front and rear telescopic legs 13 can have a larger span. In the case where there is only one telescopic leg 13 on the front shield 2 and the middle shield 3, the telescopic leg 13 can be set at the center of the bottom of the front shield 2 and the middle shield 3. In this case, a walking mechanism 14 with a wider left and right direction can be installed on the telescopic leg 13 to ensure the left and right support span.

[0034] Of course, it should be noted that for a large-diameter slurry shield machine, such a configuration of the telescopic legs 13 can ensure the stability of the shield machine's movement, but it should be emphasized that in other embodiments, if the diameter of the shield machine is smaller, it is not ruled out that the telescopic legs 13 are only provided on the front shield 2 or the middle shield 3.

[0035] It should also be added that this embodiment only exemplifies how the walking support mechanism of the slurry shield machine is set. In fact, for other types of tunnel boring machines, the walking support mechanism can also be set on the shield body. For example, for a double-shield TBM, its shield body includes a front shield 2, a telescopic shield and a support shield. In this case, telescopic legs 13 can be set on the front shield 2 and the support shield. Or, for an open TBM, its shield body includes a shield, and in this case, telescopic legs 13 can be set only on the shield. However, no matter what type of tunnel boring machine, the shield body should have an independent receiving slot.

[0036] In a further preferred embodiment, in order to prevent the telescopic legs 13 from affecting the slurry discharge equipment (slurry discharge pipe), the slurry discharge equipment (slurry discharge pipe) is normally installed at the bottom center of the front shield 2. Figure 5 and Figure 7 As shown, the front shield 2 is provided with two telescopic legs 13 spaced apart from each other, and a walking mechanism 14 is installed on each telescopic leg 13. The space between the two telescopic legs 13 forms an equipment avoidance space for avoiding the slurry discharge equipment installed at the bottom center of the front shield 2. It should be added here that the present embodiment only exemplifies the arrangement of the telescopic legs 13 in the slurry balance shield machine to avoid the slurry discharge equipment. In fact, for other forms of tunneling machines, such as an earth pressure balance shield machine, a screw conveyor for slag discharge needs to be installed at the bottom center of the front shield 2. At this time, the space between the two telescopic legs 13 is the equipment avoidance space for avoiding the slag discharge equipment.

[0037] Furthermore, if Figure 5 and Figure 7 As shown, the two telescopic legs 13 on the front shield 2 extend radially along the shield body (the shield body here can be understood as the front shield 2) and are arranged in an "eight" shape. After exiting the hole, an arc-shaped "road surface" can be adaptively laid. Compared with the vertically extending legs, the two telescopic legs 13 can be decomposed into horizontal and vertical forces, making the movement of the host more stable.

[0038] Similarly, in other preferred embodiments, Figure 6 and Figure 8 As shown, two telescopic legs 13 are provided on the middle shield 3 at intervals, and a walking mechanism 14 is installed on each telescopic leg 13. In the vertical projection, the installation positions of the two telescopic legs 13 coincide with the M-shaped beam 4 of the middle shield 3. In this way, the reaction force of the telescopic legs 13 can directly act on the M-shaped beam 4, and the M-shaped beam 4 is the main supporting structure of the middle shield 3. Compared with installing the telescopic legs 13 at other positions of the middle shield 3, this can also play a more stable supporting role.

[0039] Furthermore, if Figure 6 and Figure 8 As shown, the two telescopic legs 13 on the middle shield 3 extend radially along the shield body and are arranged in an "eight" shape.

[0040] During normal excavation, slag, mud, etc. may enter the receiving groove of the shield body. In order to protect the walking support mechanism, in some preferred embodiments, the shield body is also equipped with a detachable cover plate (not shown in the figure), which can be connected to the opening of the receiving groove to protect the walking mechanism 14 in the receiving groove. The cover plate can be connected to the corresponding position with a detachable fastener, which is convenient for disassembly. Alternatively, it can be welded to the corresponding position, and the cover plate needs to be cut off if disassembly is to be realized.

[0041] In addition, no matter how the telescopic legs 13 are arranged, in order to reduce the friction when the shield moves, Figure 2-Figure 8 Shown, the running gear 14 can all adopt the running gear of wheel type, promptly comprises the running gear of wheel frame and running wheel.Compared with the crawler-type running gear, obviously, this running gear is more convenient to move.

[0042] For slurry shield machines, Figure 2 As shown, a slurry making device 10 is provided on a trailer 9, and the slurry making device 10 has a slurry inlet for connecting to the slurry inlet pipeline 7, a slurry discharge port for connecting to the slurry discharge pipeline 6, and a slag discharge port 11 for discharging slag outward. Of course, correspondingly, the slurry inlet pipeline 7 and the slurry discharge pipeline 6 are also provided with matching pumps and valves. The specific slurry inlet and discharge principles are existing technologies and will not be repeated here. This is equivalent to integrating a small mud-water separation station on the trailer 9, without the need to connect the slurry inlet pipeline 7 and the slurry discharge pipeline 6 to the starting wellhead (the mud-water separation station of a general slurry balance shield machine is located at the starting wellhead), which is convenient for transfer.

[0043] The specific embodiment of the shield assembly in the present invention is as follows: The shield assembly includes the shield body and the walking support mechanism described in the above-mentioned embodiment of the tunnel boring machine, which will not be described in detail here.

[0044] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A shield assembly, comprising a shield, characterized in that: A walking support mechanism is installed on the shield body. The walking support mechanism has a set support span in the front and rear and left and right directions. The walking support mechanism includes a telescopic leg and a walking mechanism installed at the telescopic output end of the telescopic leg. An independent accommodating groove for accommodating the walking mechanism is provided on the shield body, so that the walking mechanism can be completely accommodated in the accommodating groove after the telescopic leg is retracted.

2. The shield assembly according to claim 1, characterized in that: The shield body comprises a front shield and a middle shield, and each of the front shield and the middle shield is provided with at least one telescopic leg.

3. The shield assembly according to claim 2, characterized in that: The front shield is provided with two telescopic legs spaced apart on the left and right, and each telescopic leg is installed with a walking mechanism. The space between the two telescopic legs forms an equipment avoidance space for avoiding the slag or slurry discharge equipment installed at the center of the bottom of the front shield.

4. The shield assembly according to claim 2, characterized in that: The two telescopic legs on the front shield extend radially along the shield body and are arranged in an "eight" shape.

5. The shield assembly according to any one of claims 2 to 4, characterized in that: Two telescopic legs are arranged on the middle shield at intervals on the left and right, each of which is equipped with a walking mechanism, and in the vertical projection, the installation position of the two telescopic legs coincides with the M-shaped beam of the middle shield.

6. The shield assembly according to claim 5, characterized in that: The two telescopic legs on the middle shield extend radially along the shield body and are arranged in an "eight" shape.

7. The shield assembly according to any one of claims 1 to 4, characterized in that: The shield body is also provided with a detachable cover plate, which is used to be connected to the opening of the receiving groove to protect the walking mechanism received in the receiving groove.

8. The shield assembly according to any one of claims 1 to 4, characterized in that: The traveling mechanism is a wheeled traveling mechanism comprising a wheel frame and traveling wheels.

9. A roadheader, comprising a main machine and a rear supporting system, wherein the rear supporting system comprises a plurality of trailers connected in sequence front and rear, wherein: The host comprises the shield assembly according to any one of claims 1-8.

10. The tunnel boring machine according to claim 9, characterized in that: The tunnel boring machine is a slurry balance shield machine, and one of the trailers is provided with a slurry making device, which has a slurry inlet for connecting to a slurry inlet pipeline, a slurry discharge outlet for connecting to a slurry discharge pipeline, and a slag discharge outlet for discharging slag outward.

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