Shield body and heading machine

Abstract

The utility model belongs to the technical field of full-section tunneling equipment, and particularly provides a shield body and a tunneling machine. The shield body comprises a shell, a top sub-block, a right sub-block, a bottom sub-block, a left middle sub-block and a left upper sub-block, every two adjacent inner sub-blocks are detachably connected, all the inner sub-blocks and the shell are detachably connected, and the extending intersecting line of the two end faces, used for being spliced with the two adjacent inner sub-blocks, of the left middle sub-block is located on the outer side of the shell or is parallel to the two end faces. The arc top setting position of the inner wall of the shell and each inner sub-block are provided with a plurality of lifting lug connecting point positions used for being connected with disassembling lifting lugs, and the lifting lug connecting point positions of the top sub-block, the right sub-block, the left middle sub-block and the left upper sub-block are at least arranged at the front end and the rear end of each inner sub-block. Threaded holes used for being connected with disassembly lifting lugs are at least formed in the lifting lug connecting points at the arc top of the inner wall of the shell. The heading machine comprises the shield body. When the device is used for disassembling operation, the disassembling lifting lugs can be connected to the lifting lug connecting point positions firstly, and a proper crane and a proper sling are selected to pull and lift the inner blocks to be separated.

Description

Technical Field

[0001] The utility model belongs to the technical field of full-section tunneling equipment, in particular to a shield and a tunneling machine. Background Art

[0002] Full-section tunnel boring machines (hereinafter referred to as tunnel boring machines) have the advantages of safety and high efficiency, and have been promoted and applied in various tunnel construction projects. In conventional construction projects, it is necessary to dig a starting shaft and a receiving shaft. The tunnel boring machine is assembled and started in the starting shaft and excavated to the receiving shaft. The tunnel boring machine can be disassembled in the receiving shaft, and the various disassembled parts can be lifted out of the receiving shaft to complete the recovery of the tunnel boring machine. However, in some projects, due to restrictions on ground construction conditions or municipal construction requirements, it is impossible to excavate a receiving shaft. At this time, the only way to recover the tunnel boring equipment is to dismantle the machine and withdraw it inside the tunnel. The shield is large in size and weight, making it difficult to disassemble it inside the tunnel.

[0003] In order to facilitate the disassembly of the shield body in the hole, the applicant's utility model patent with authorization announcement number CN209483351U provides a double-layer shield system, which includes an outer shell and multiple inner blocks located inside the outer shell. Taking the front shield as an example, the front shield includes an outer shell and five inner blocks located inside the outer shell. The five inner blocks are respectively a top block located at the top of the arc, a bottom block located at the bottom, a right block located on the right side, an upper left block located at the upper left part, and a left middle block located at the middle left part. The intersection line formed by the extension of the two circumferential side surfaces of the left middle block (that is, the end faces of the inner block used for splicing with the two adjacent inner blocks) is located on the radial outside of the inner block (similar to an inner eight-shaped shape with the flared mouth facing inward). The inner blocks are spliced ​​together to form a complete annular structure. The adjacent inner blocks in the circumferential direction are connected by flanges and bolts (that is, the inner blocks are provided with connecting flanges at both ends for splicing with the two adjacent inner blocks), and the inner blocks in the radial direction are connected by bolts and pull blocks. When the machine needs to be disassembled, the connection between the inner blocks and the outer shell can be released by removing the bolts that connect the parts. There is no need to use fire to cut in the hole, which is more convenient and safe.

[0004] However, the aforementioned patent only discloses how to disconnect the different internal blocks and between the internal blocks and the outer shell, but does not disclose how to disassemble and separate the internal blocks. In reality, the space inside the tunnel is limited, and large disassembly and assembly equipment is difficult to enter. How to facilitate the disassembly and separation of the internal blocks remains a problem that needs to be solved. Utility Model Content

[0005] The purpose of the present invention is to provide a shield body that provides conditions for disassembling a double-layer shield body in a tunnel, thereby solving the technical problem of the prior art that the double-layer shield body is inconvenient to disassemble in a tunnel. The purpose of the present invention is also to provide a tunnel boring machine to solve the same technical problem.

[0006] To achieve the above-mentioned purpose, the technical solution of the shield provided by the present invention is:

[0007] The shield body includes an outer shell and five inner blocks, which are a top block, a right block, a bottom block, a left middle block, and an upper left block. The connections between two adjacent inner blocks and between each inner block and the outer shell are detachable. The extended intersection of the two end faces of the left middle block for splicing with the two adjacent inner blocks is located on the outside of the outer shell or parallel to the two end faces. The arc top setting position of the inner wall of the outer shell and each inner block are provided with multiple ear connection points for connecting the disassembly ears. The ear connection points of the top block, the right block, the left middle block, and the upper left block are at least respectively provided on the front and rear end faces of each inner block, and at least the ear connection point at the arc top of the inner wall of the outer shell is provided with a threaded hole for connecting the disassembly ears. The setting position includes the positions on the front and rear sides of the top block.

[0008] As a further improvement, the set position also includes a position in contact with the top block.

[0009] As a further improvement, the set position also includes positions on both sides of the front and rear of the left middle block.

[0010] As a further improvement, the ear connection points at the front and rear ends of the top block, the right block, the left middle block, and the upper left block are provided with fixing seats, and the fixing seats are provided with threaded holes for connecting the disassembly ears.

[0011] As a further improvement, threaded holes for connecting the disassembly ears are provided on the front and rear partitions of the top block, right block, left middle block and upper left block, and the positions of the threaded holes constitute the ear connection points of the corresponding blocks.

[0012] As a further improvement, the shield body is further provided with a threaded plug for sealing the threaded hole.

[0013] As a further improvement, a plurality of threaded holes for connecting the disassembly ears are also provided on the outer arc-shaped wall of the right block, and the positions of the threaded holes correspond to the ear connection points on the right block.

[0014] As a further improvement, the two adjacent inner blocks are connected by flanges, and the flange at the end of the annular right block away from the bottom block has a bolt hole for one end of the disassembly ear to pass through, and the position of the bolt hole corresponds to the ear connection point on the right block.

[0015] As a further improvement, the two adjacent inner blocks are connected by flanges, and the flanges at both ends of the bottom block have bolt holes for one end of the disassembly ear to pass through, and the position of the bolt hole corresponds to the ear connection point on the bottom block.

[0016] The utility model is an improved invention, and its beneficial effects are as follows: the utility model is provided with lifting ear connection points that can be connected to the dismantling lifting ears at multiple positions of the arc top of the outer shell and on each inner block. When the machine needs to be dismantled, the dismantling lifting ears can be connected to the lifting ear connection points and connected to the sling or crane used for dismantling the machine. Specifically, since the extended intersection lines of the two end faces of the left middle block used for splicing with the two adjacent inner blocks are located on the outer side of the outer shell or parallel to the two end faces, the basis for pulling it out inward is provided, and the left middle block can be used as the first block to be disassembled. When disassembling the left middle block, the front and rear ends of the left middle block and the front of the right block opposite to the left middle block can be The lifting ear connection points at the rear ends are connected to the dismantling lifting ears, and the crane used for dismantling (such as electric hoist) is connected to the position of the dismantling lifting ear of the right block. The crane is connected to the dismantling lifting ear of the left middle block through a sling. The left middle block can be pulled inward by retracting the sling, and the lifting ear connection point (threaded hole) at the arc top of the shell can be utilized at the same time; connect the dismantling lifting ear and connect the crane, and connect the dismantling lifting ears connected to the lifting ear connection points at the front and rear ends of the left middle block through a sling. In this way, when the left middle block moves inward, it will not fall under the pulling action of the crane at the arc top, and then the left middle block is separated. After separation, a flatbed cart is used to receive and transport it out of the hole. After the left middle block is disassembled, there is space at this position for the upper left block to move downward. At this time, the lug connection point at the top of the arc is also used to connect the disassembly lug and the crane, and the lug connection points at the front and rear ends of the upper left block are used to connect the lug and the sling. By controlling the crane, the upper left block can be lowered and adjusted to move to the center position. A flatbed trolley can also be used to receive and transport it out of the hole. Similarly, by analogy, the disassembly of other blocks is completed one by one. Unlike the prior art, the shield body of the present invention is pre-set with lug connection points that can be connected to the disassembly lug, and the position of each lug connection point satisfies the connection of the crane or the sling to realize the disassembly and separation of each block, and the lug connection point at the top of the arc on the inner wall of the shell is a threaded hole, which can also facilitate the connection of the disassembly lug without the need for hot welding, and also makes construction safer.

[0017] To achieve the above-mentioned purpose, the technical solution of the tunnel boring machine provided by the present invention is:

[0018] The tunnel boring machine includes a shield body, which includes an outer shell and five inner blocks. The five inner blocks are respectively a top block, a right block, a bottom block, a left middle block, and an upper left block. The adjacent inner blocks and the inner blocks and the outer shell are all detachably connected. The extended intersection line of the two end faces of the left middle block for splicing with the two adjacent inner blocks is located on the outside of the outer shell or parallel to the two end faces. The arc top setting position of the inner wall of the outer shell and each inner block are provided with multiple ear connection points for connecting the dismantling ear. The ear connection points of the top block, the right block, the left middle block, and the upper left block are at least respectively provided on the front and rear end faces of each inner block, and at least the ear connection point at the arc top of the inner wall of the outer shell is provided with a threaded hole for connecting the dismantling ear. The setting position includes the positions on the front and rear sides of the top block.

[0019] As a further improvement, the set position also includes a position in contact with the top block.

[0020] As a further improvement, the set position also includes positions on both sides of the front and rear of the left middle block.

[0021] As a further improvement, the ear connection points at the front and rear ends of the top block, the right block, the left middle block, and the upper left block are provided with fixing seats, and the fixing seats are provided with threaded holes for connecting the disassembly ears.

[0022] As a further improvement, threaded holes for connecting the disassembly ears are provided on the front and rear partitions of the top block, right block, left middle block and upper left block, and the positions of the threaded holes constitute the ear connection points of the corresponding blocks.

[0023] As a further improvement, the shield body is further provided with a threaded plug for sealing the threaded hole.

[0024] As a further improvement, a plurality of threaded holes for connecting the disassembly ears are also provided on the outer arc-shaped wall of the right block, and the positions of the threaded holes correspond to the ear connection points on the right block.

[0025] As a further improvement, the two adjacent inner blocks are connected by flanges, and the flange at the end of the annular right block away from the bottom block has a bolt hole for one end of the disassembly ear to pass through, and the position of the bolt hole corresponds to the ear connection point on the right block.

[0026] As a further improvement, the two adjacent inner blocks are connected by flanges, and the flanges at both ends of the bottom block have bolt holes for one end of the disassembly ear to pass through, and the position of the bolt hole corresponds to the ear connection point on the bottom block.

[0027] The utility model is an improved invention, and its beneficial effects are as follows: the utility model is provided with lifting ear connection points that can be connected to the dismantling lifting ears at multiple positions of the arc top of the outer shell and on each inner block. When the machine needs to be dismantled, the dismantling lifting ears can be connected to the lifting ear connection points and connected to the sling or crane used for dismantling the machine. Specifically, since the extended intersection lines of the two end faces of the left middle block used for splicing with the two adjacent inner blocks are located on the outer side of the outer shell or parallel to the two end faces, the basis for pulling it out inward is provided, and the left middle block can be used as the first block to be disassembled. When disassembling the left middle block, the front and rear ends of the left middle block and the front of the right block opposite to the left middle block can be The lifting ear connection points at the rear ends are connected to the dismantling lifting ears, and the crane used for dismantling (such as electric hoist) is connected to the position of the dismantling lifting ear of the right block. The crane is connected to the dismantling lifting ear of the left middle block through a sling. The left middle block can be pulled inward by retracting the sling, and the lifting ear connection point (threaded hole) at the arc top of the shell can be utilized at the same time; connect the dismantling lifting ear and connect the crane, and connect the dismantling lifting ears connected to the lifting ear connection points at the front and rear ends of the left middle block through a sling. In this way, when the left middle block moves inward, it will not fall under the pulling action of the crane at the arc top, and then the left middle block is separated. After separation, a flatbed cart is used to receive and transport it out of the hole. After the left middle block is disassembled, there is space at this position for the upper left block to move downward. At this time, the lug connection point at the top of the arc is also used to connect the disassembly lug and the crane, and the lug connection points at the front and rear ends of the upper left block are used to connect the lug and the sling. By controlling the crane, the upper left block can be lowered and adjusted to move to the center position. A flatbed trolley can also be used to receive and transport it out of the hole. Similarly, by analogy, the disassembly of other blocks is completed one by one. Unlike the prior art, the shield body of the present invention is pre-set with lug connection points that can be connected to the disassembly lug, and the position of each lug connection point satisfies the connection of the crane or the sling to realize the disassembly and separation of each block, and the lug connection point at the top of the arc on the inner wall of the shell is a threaded hole, which can also facilitate the connection of the disassembly lug without the need for hot welding, and also makes construction safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is an axial schematic diagram of an embodiment of a shield body in the present invention;

[0029] Figure 2 This is a partial cross-sectional view of one embodiment of the shield body of the present invention;

[0030] Figure 3 This is a partial cross-sectional view of another embodiment of the shield body of the present invention;

[0031] Figure 4 This is a schematic diagram of the lifting connection method of the shield embodiment of the present invention during the disassembly process;

[0032] Figure 5This is a schematic diagram of the process of disassembling the left middle block of the middle shield embodiment of the utility model;

[0033] Figure 6 This is a schematic diagram of the process of disassembling the upper left block of the shield embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of the process of disassembling the top block of the shield embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the process of disassembling the right block of the shield embodiment of the present invention;

[0036] Figure 9 This is a schematic diagram of the process of disassembling the bottom block of the shield embodiment of the present invention.

[0037] Description of reference numerals:

[0038] 1. Left middle block; 2. Upper left block; 3. Top block; 4. Right block; 5. Bottom block; 6. Outer shell; 7. Threaded hole; 8. Partition; 9. Fixed seat; 10. Sling; 11. Articulated device. DETAILED DESCRIPTION

[0039] To provide a shield that is easily disassembled, the basic technical concept of this utility model is to retain the internal and external layered structure of the outer shell, while pre-installing multiple lug connection points on the inner wall of the outer shell and at multiple locations on each internal block. This allows for the connection of lugs to the disassembly lugs during disassembly operations. The lugs can then be connected to the lug connection points, and a suitable crane and sling can be used to lift and separate the internal blocks.

[0040] The present invention is further described in detail below with reference to the embodiments.

[0041] The specific embodiment of the shield provided by the utility model is as follows:

[0042] One implementation method of the shield provided in this embodiment is as follows Figure 1As shown, similarly, it includes an outer shell 6 and five inner blocks located inside the outer shell 6. The five inner blocks can be assembled to form a complete ring. The central area of ​​the ring can be used to arrange key components of the tunnel boring machine such as the main drive to play a protective and supporting role. Specifically, the five inner blocks are the left middle block 1, the upper left block 2, the top block 3, the right block 4 and the bottom block 5. The adjacent inner blocks are detachably connected. Specifically, flange connection can be used. The two ends of the ring of the adjacent inner blocks, that is, the two ends for splicing with the adjacent inner blocks, are provided with flanges. After the two inner blocks are spliced, bolts can be inserted into the bolt holes on the flanges and tightened with nuts to complete the connection of the adjacent inner blocks. In addition to the flange connection, a detachable connecting plate can also be used. The connecting plate is installed at the splicing seam of the adjacent inner blocks. Threaded holes can be set at the position of the inner block near the splicing seam. The connecting plate is provided with two rows of bolt through holes. Bolts are passed through the connecting plate and connected to the threaded holes on the inner blocks to achieve the connection of the adjacent inner blocks. Each inner block and the outer shell 6 are also detachably connected, specifically by bolts and pull blocks provided by the utility model patent with authorization announcement number CN209483351U. Each inner block and the inner block and the outer shell 6 are detachably connected, thus providing the prerequisite for disassembling the shield body in the hole. Similarly, among the five inner blocks, the extended intersection line of the two end faces of the left middle block 1 for splicing with the adjacent two inner blocks is located on the outside of the outer shell 6, forming an "inner eight" structure with the flared mouth exceeding the inner side, such as Figure 3 As shown, when disassembling, the left middle block 1 can be pulled inward first to remove the left middle block 1. Alternatively, in other embodiments, ideally, the two end faces of the left middle block 1 for splicing with the two adjacent inner blocks are parallel, so that the left middle block 1 can also be pulled inward. Preferably, the left middle block 1 is located as shown in FIG. Figure 1 Compared with the solution of setting the left middle block 1 at the top, the waist position shown in the figure can continue to support the left middle block 1 before the left middle block 1 is completely pulled out, which is safer.

[0043] like Figure 2 and Figure 3 As shown, in this embodiment, the arc top of the inner wall of the shell 6 is provided with a plurality of ear connection points. Specifically, the ear connection points are provided with threaded holes 7. The threaded holes 7 are used to connect the ear used for disassembly (hereinafter referred to as the disassembly ear, not shown in the figure). The disassembly ear can be a ear with an external thread section. When in use, the external thread section of the ear can be screwed into the threaded hole 7 of the shell 6 to achieve the installation of the ear. Figure 4 As shown, when dismantling the machine, the dismantling ear can be screwed into the threaded hole 7, and then a crane can be installed on the dismantling ear. The crane can be an electric hoist, and the sling 10 of the crane can be connected to the internal block. By adjusting different cranes to pull the sling 10 to move, different internal blocks and the outer shell 6 can be separated.

[0044] like Figure 4-Figure 9 As shown, each inner block is also provided with a plurality of lifting lug connection points. When dismantling the machine, the lifting lug connection points can be used to connect the dismantling lifting lugs and connect the sling 10 or the crane. Specifically, for the top block 3, the left middle block 1, and the upper left block 2, if the lifting of each block is to be realized, the front and rear ends of each block are directly exposed after the other parts inside the outer shell (such as the main drive and the propulsion cylinder) are removed. Basically, the front and rear ends of each block, specifically the partition 8, should be provided with lifting lug connection points. However, for the left middle block 1, in order to be able to pull it out, the front and rear ends of the right block 4 opposite to it should also be provided with lifting lug connection points. Of course, for the bottom block 5, when dismantling the bottom block 5, it means that the other inner blocks have been dismantled. At this time, the two ends of the ring are also exposed, and the bolt holes on the flanges at the two ends of the ring of the bottom block 5 can be directly used.

[0045] The inner wall of the outer shell 6 needs to fit with the outer arc-shaped wall of the inner block or install other components (such as the propulsion cylinder). In order not to affect the normal use of the outer shell 6, the connection points of the lifting ears on the outer shell 6 can only be threaded holes. When needed, the lifting ears can be directly connected to the threaded holes without the need for hot welding, which makes construction safer. However, unlike the outer shell 6, the partition 8 is directly exposed. Under the premise of not affecting the installation of the propulsion cylinder, drive motor (or hydraulic motor), gearbox, various pipelines and other devices, the connection points of the lifting ears on the inner block can be a way to add a component on the partition to connect the lifting ears.

[0046] Specifically, if Figure 2 As shown, a fixing seat 9 can be set at the lug connection point on the partition 8 at the front and rear ends of the inner block. The fixing seat 9 can be welded to the partition 8 in advance. The fixing seat 9 is provided with a threaded hole 7, which is used to connect the disassembly lug. The diameter specification of the threaded hole 7 here can be consistent with the specification of the threaded hole 7 on the inner wall of the shell 6, so that the disassembly lug can be used in different positions. Or, as Figure 3 As shown, the partition 8 can also be provided with a threaded hole 7 for connecting the disassembly ear, and the location of the threaded hole 7 is the ear connection point. Figure 2 The method shown in the figure does not affect the strength of the partition 8 and is more suitable for use in equipment such as shield machines that require pressure-maintaining and sealing excavation.

[0047] In order to realize the lifting of each internal block, Figure 5 and Figure 6 As shown, the threaded holes 7 at the top of the inner wall of the shell 6 should be set at least at the front and rear sides of the top block 3, so that the disassembly lugs can be smoothly connected before the top block 3 is disassembled to complete the lifting of the internal blocks. Of course, in order to facilitate the smooth disassembly of the right block 4 and the bottom block 5, further, as shown Figure 7 and Figure 8As shown, threaded holes 7 may also be provided on the inner wall of the housing 6 at a position in contact with the top block 3. Of course, in order to ensure that the upper sling 10 can remain in a nearly vertical state when the left middle block 1 is initially pulled, threaded holes 7 may also be provided on the inner wall of the housing 6 at positions on both the front and rear sides of the upper left block 2.

[0048] Regardless of the position of the threaded hole 7, in a preferred embodiment, a threaded plug can be configured on the shield body, and the threaded plug can be used to seal the threaded hole 7 during normal excavation. This has two effects. For the shield machine, since it needs to maintain pressure and seal during the excavation process, if the threaded hole 7 is a blind hole, the strength of this position is weak and there is a risk of sealing failure. Using a threaded plug to seal the threaded hole 7 can ensure sealing during normal excavation. If the threaded hole 7 is a through hole, the threaded plug here not only plays a sealing role, but also protects the threaded hole 7 to prevent the debris in the formation from blocking the threaded hole 7 during excavation. For TBM (full-section hard rock tunnel boring machine), it does not need to maintain pressure during the excavation process. If the threaded hole 7 is a blind hole, there is no need to configure a threaded plug.

[0049] like Figure 8 As shown, the outer curved wall of the right block 4 is also provided with multiple threaded holes for connecting to the disassembly lugs, and these threaded holes correspond to the lug connection points of the right block 4. When disassembling the right block 4, the right block 4 can be flipped to a certain angle to expose the outer curved wall. In this case, the threaded holes on the outer curved wall can be used to connect to the disassembly lugs. In other embodiments, if the outer curved wall of the right block 4 is not provided with threaded holes, the lug connection points at the front and rear ends of the right block 4 can also be used to connect to the disassembly lugs.

[0050] Of course, if Figure 8 As shown, flange connection is adopted for two adjacent inner blocks. Since the flange has bolt holes, the bolt holes of the flange can be used to connect the disassembly lugs. Specifically, for the right block 4, the lug connection point includes the position of the bolt hole on the flange that satisfies one end of the disassembly lug. After the disassembly lug passes through the bolt hole, the disassembly lug can be locked with a nut. For the bottom block 5, as the last inner block to be disassembled, the bolt holes on the flanges at both ends of the annular portion can be directly used. Similarly, the position of the bolt hole on the flange that satisfies one end of the disassembly lug is the lug connection point.

[0051] The disassembly process of each internal block in this embodiment is as follows Figure 5-Figure 9 As shown, first disassemble the left middle block 1, as Figure 5As shown, at this time, the dismantling lugs can be connected using the lug connection points on the right block 4 opposite to the left middle block 1, and at the same time, the dismantling lugs can be installed using the threaded holes 7 on the inner wall of the shell 6 located on the front and rear sides of the top block 3. Then, the left middle block 1, the right block 4, and the shell 6 are connected using a crane and a sling 10. The movements of each crane are adjusted to pull the left middle block 1 inward (to the right in the figure). At this time, the matching trolley can be moved to the bottom of the left middle block 1, receive the left middle block 1, and transport the left middle block 1 backward out of the hole. After the left middle block 1 is dismantled, the upper left block 2 has space to move downward, as shown in FIG. Figure 6 As shown, a sling 10 is connected to the corresponding positions of the housing 6 and the upper left block 2 to remove the upper left block 2. Figure 7 As shown, the top block 3 can be removed using the same method. Figure 8 As shown, when removing the right block 4, it is necessary to connect the lifting ears at the corresponding positions of the shell 6, the bottom block 5 and the right block 4 and pull the right block 4 to flip over. In order to ensure stability, a hinge device 11 can be used to swing the right block 4 inward around the axis of the hinge device 11 to a central position. The hinge device 11 refers to a device including a hinge shaft and two hinge plates. The two hinge plates can be connected to the flanges of the right block 4 and the bottom block 5 respectively. After the right block 4 rotates a certain angle to the central position, the trolley moves to the bottom of the right block 4 to complete the removal of the right block 4. When disassembling the last inner block, namely the bottom block 5, the space inside the shell 6 is larger, as shown in FIG. Figure 9 As shown, the bottom block 5 can be directly lifted.

[0052] Specific embodiment of the tunnel boring machine in the utility model:

[0053] The tunnel boring machine includes a shield body, wherein the shield body has the same structure as that described in the above-mentioned shield body embodiment and will not be described in detail here.

[0054] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments without inventive effort, or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A shield body, comprising an outer shell and five inner blocks, wherein the five inner blocks are a top block, a right block, a bottom block, a left middle block, and an upper left block. Adjacent inner blocks and each inner block and the outer shell are detachably connected. The extended intersection line of the two end faces of the left middle block for splicing with the adjacent inner blocks is located outside the outer shell or parallel to the two end faces. The shield body is characterized by: The arc top setting position of the inner wall of the outer shell and each inner block are provided with multiple ear connection points for connecting the disassembly ear. The ear connection points of the top block, right block, left middle block and upper left block are at least respectively provided on the front and rear end surfaces of each inner block, and at least the ear connection point at the arc top of the inner wall of the outer shell is provided with a threaded hole for connecting the disassembly ear. The set position includes the positions on the front and rear sides of the top block.

2. The shield according to claim 1, wherein: The set position also includes a position in contact with the top block.

3. The shield according to claim 1 or 2, characterized in that: The set position also includes positions located at the front and rear sides of the left middle block.

4. The shield according to claim 1, wherein: The ear connection points at the front and rear ends of the top block, the right block, the left middle block, and the upper left block are provided with fixing seats, and the fixing seats are provided with threaded holes for connecting the disassembly ears.

5. The shield according to claim 1, wherein: Threaded holes for connecting the disassembly ears are provided on the front and rear partitions of the top block, right block, left middle block and upper left block, and the positions of the threaded holes constitute the ear connection points of the corresponding blocks.

6. The shield according to any one of claims 1, 2, 4 and 5, characterized in that: The shield body is also provided with a threaded plug for sealing the threaded hole.

7. The shield according to claim 1, wherein: The outer arc-shaped wall of the right block is also provided with a plurality of threaded holes for connecting the disassembly lifting ears, and the positions of the threaded holes correspond to the connection points of the lifting ears on the right block.

8. The shield according to any one of claims 1, 2, 4, 5, and 7, wherein: The two adjacent inner blocks are connected by flanges. The flange at the end of the right block facing upward and away from the bottom block has a bolt hole for one end of the disassembly ear to pass through. The position of the bolt hole corresponds to the ear connection point on the right block.

9. The shield according to any one of claims 1, 2, 4, 5, and 7, wherein: The adjacent two inner blocks are connected by flanges. The flanges at both ends of the bottom block have bolt holes for one end of the disassembly lug to pass through. The positions of the bolt holes correspond to the connection points of the lugs on the bottom block.

10. A tunnel boring machine including a shield, characterized in that: The shield body is the shield body described in any one of claims 1 to 9.

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