Rear support of heading machine and heading machine

Abstract

The invention provides a rear support of a heading machine and the heading machine, and belongs to the field of tunneling equipment. The rear support of the heading machine comprises a rear support body, a vertical direction adjusting device and a horizontal direction adjusting device which are connected to the rear support body, and further comprises a limiting structure and a matching structure, one of the limiting structure and the matching structure is installed on the rear support body, and the other one is used for being installed on a main beam or an inner yoke. The limiting structure comprises at least two limiting parts which are arranged front and back, the matching structure comprises a limiting matching part which is located between the two limiting parts which are adjacent front and back, and gaps are reserved between the limiting matching part and the limiting part which is adjacent to the front side and / or the limiting part which is adjacent to the rear side. The heading machine comprises the heading machine rear support. The limiting structure and the matching structure can be matched in a limiting mode after the up-down steering amplitude or the left-right steering amplitude of the heading machine exceeds a design value, so that the rear supporting body deflects adaptively, and damage to the knuckle bearing is avoided.

Description

Technical Field

[0001] The invention belongs to the field of tunnel boring equipment, and in particular relates to a tunnel boring machine rear support and a tunnel boring machine. Background Art

[0002] The rear support in an open TBM is used to provide support for the tail end of the main beam or the inner gantry during the step-changing process. The rear support of some open TBMs is also provided with a direction adjustment structure for offsetting the tail end of the main beam or the inner gantry so as to change the excavation direction of the open TBM.

[0003] The existing Chinese utility model patent application with authorization announcement number CN222162616U discloses a rear support for a tunnel boring machine, which includes a mounting base, a support arm assembly, a vertical cylinder and a horizontal adjustment cylinder. The support arm assembly includes a support arm mounting base and support cylinders installed on the left and right sides of the support arm mounting base. The support cylinders are connected with boot plates so that they can be horizontally braced against the wall of the tunnel; the mounting base is used to be installed on the main beam or the inner deck, and the vertical cylinder and the horizontal adjustment cylinder are both connected between the mounting base and the support arm assembly, and are used to control the vertical and horizontal displacement of the main beam or the inner deck, respectively.

[0004] In the above-mentioned tunnel boring machine rear support, a spherical bearing is arranged between the vertical oil cylinder and the horizontal steering oil cylinder and the mounting base. The spherical bearing can adapt to the small-range pitch or left-right swing of the vertical oil cylinder and the horizontal steering oil cylinder relative to the main beam or the inner rib. The allowable swing of the spherical bearing exceeds its design value, which can easily cause damage to the spherical bearing. Therefore, before construction, it is necessary to select the specifications and models of the spherical bearing according to the maximum design value of the excavation slope and the minimum design value of the turning radius for left and right turns. However, in the actual construction process, due to the influence of geological conditions or the operating errors of the operators, the excavation slope at some locations of the tunnel may exceed its maximum design value, or the turning radius may be less than its minimum design value. At this time, the spherical bearing will face the risk of damage. Summary of the invention

[0005] One of the purposes of the present invention is to provide a rear support for a tunnel boring machine to solve the technical problem in the prior art that the spherical bearings on the vertical and horizontal steering devices are easily damaged when the tunnel boring machine is excavating uphill or downhill or turning left or right due to geological conditions or operational errors and the excavation slope exceeds its maximum design value, or the turning radius is less than its minimum design value.

[0006] Another object of the present invention is to provide a tunneling machine to solve the above technical problems.

[0007] To achieve the above purpose, the technical solution of the rear support of the roadheader provided by the present invention is: A rear support for a tunnel boring machine includes a rear support body, a vertical adjustment device and a horizontal adjustment device connected to the rear support body, and also includes a limiting structure and a matching structure, one of the limiting structure and the matching structure is installed on the rear support body, and the other is used to be installed on the main beam or the inner cover, the limiting structure includes at least two limiting parts arranged in front and behind, the matching structure includes a limiting matching part located between two adjacent limiting parts in the front and back, and a gap is left between the limiting matching part and the limiting part adjacent to the front side and / or the limiting part adjacent to the rear side.

[0008] As a further improvement, the limiting portion includes at least two limiting columns spaced apart from each other on the left and right sides, and the limiting matching portion is a beam extending in the left and right directions.

[0009] As a further improvement, the matching structure includes a connecting column, one end of which in the length direction is fixedly connected to the cross beam, and two cross beams are provided and are respectively located at the front and rear sides of the connecting column.

[0010] As a further improvement, the matching structure includes at least two connecting columns arranged at intervals on the left and right, and one end of the connecting column in the length direction is fixedly connected to the crossbeam.

[0011] As a further improvement, the limiting posts and the connecting posts are staggered in the front-to-back direction.

[0012] As a further improvement, the side surfaces of the limiting matching portion used to match with the limiting portion are all planes, and the side surfaces of the limiting portion used to match with the limiting matching portion are all planes.

[0013] As a further improvement, the limiting structure and the matching structure both include a main body and a transition piece, the transition piece is used to be fixedly connected to the rear support body or the main beam or the inner cover, and the transition piece and the main body are connected by a detachable fastener.

[0014] As a further improvement, the adapter is provided with at least two mounting positions for mounting the main body part, and the mounting positions are arranged front to back or left to right.

[0015] As a further improvement, the main parts of the limiting structure and the matching structure are profiles.

[0016] The beneficial effect is that the rear support of the tunnel boring machine provided by the present invention is an improvement on the prior art. The rear support of the tunnel boring machine is provided with a limiting structure and a matching structure on the basis of the prior art. When the tunnel boring machine starts to dig uphill or downhill, the tail of the main beam or the inner shell of the tunnel boring machine will deflect up and down, and the matching structure will deflect together with the main beam or the inner shell, thereby causing the limiting matching part to move forward or backward, reducing the gap value between the limiting matching part and the limiting part adjacent to its front side or the limiting part adjacent to its rear side. When the tunnel boring machine is located at the position of the maximum design slope or the minimum design slope of the tunnel, the gap between the limiting matching part and the limiting part on its front side or rear side is zero. If the tunneling slope exceeds the maximum design value or the minimum design value due to unexpected circumstances, the limiting matching part will press against the limiting part and generate a force on the limiting part, forcing the limiting part and the rear support body to deflect a small amount, thereby ensuring that the deflection angle of the vertical direction adjustment device and the horizontal direction adjustment device relative to the main beam will not exceed the maximum deflection angle allowed by the joint bearing thereon, and finally avoiding damage to the joint bearing. When the tunnel boring machine starts to turn left or right, the matching structure will swing left or right under the drive of the main beam, which will also reduce the gap between the limit matching part and the limit part. Similarly, when the turning radius of the tunnel boring machine reaches the designed minimum turning radius, the gap between the limit matching part and the limit part is zero. If the turning radius of the tunnel boring machine is less than the designed minimum turning radius due to unexpected circumstances, the limit matching part will press against the limit part and exert force on the limit part, forcing the limit part and the rear support body to deflect a small amount, thereby ensuring that the swing angle of the vertical and horizontal direction adjustment devices relative to the main beam will not exceed the maximum swing angle allowed by the joint bearings thereon.

[0017] To achieve the above object, the technical solution of the tunnel boring machine provided by the present invention is: A tunnel boring machine includes a main beam or an inner chassis, and also includes a rear support of the tunnel boring machine. The rear support of the tunnel boring machine includes a rear support body, a vertical adjustment device and a horizontal adjustment device connected to the rear support body, and also includes a limiting structure and a matching structure. One of the limiting structure and the matching structure is installed on the rear support body, and the other is used to be installed on the main beam or the inner chassis. The limiting structure includes at least two limiting parts arranged in front and behind, and the matching structure includes a limiting matching part located between two adjacent limiting parts in front and behind, and a gap is left between the limiting matching part and the limiting part adjacent to the front side and / or the limiting part adjacent to the rear side.

[0018] As a further improvement, the limiting portion includes at least two limiting columns spaced apart from each other on the left and right sides, and the limiting matching portion is a beam extending in the left and right directions.

[0019] As a further improvement, the matching structure includes a connecting column, one end of which in the length direction is fixedly connected to the cross beam, and two cross beams are provided and are respectively located at the front and rear sides of the connecting column.

[0020] As a further improvement, the matching structure includes at least two connecting columns arranged at intervals on the left and right, and one end of the connecting column in the length direction is fixedly connected to the crossbeam.

[0021] As a further improvement, the limiting posts and the connecting posts are staggered in the front-to-back direction.

[0022] As a further improvement, the side surfaces of the limiting matching portion used to match with the limiting portion are all planes, and the side surfaces of the limiting portion used to match with the limiting matching portion are all planes.

[0023] As a further improvement, the limiting structure and the matching structure both include a main body and a transition piece, the transition piece is used to be fixedly connected to the rear support body or the main beam or the inner cover, and the transition piece and the main body are connected by a detachable fastener.

[0024] As a further improvement, the adapter is provided with at least two mounting positions for mounting the main body part, and the mounting positions are arranged front to back or left to right.

[0025] As a further improvement, the main parts of the limiting structure and the matching structure are profiles.

[0026] The beneficial effect is that the tunnel boring machine provided by the present invention is an improvement over the prior art. The rear support of the tunnel boring machine in the tunnel boring machine is provided with a limit structure and a matching structure on the basis of the prior art. When the tunnel boring machine starts to dig uphill or downhill, the tail of the main beam or the inner shell of the tunnel boring machine will deflect up and down, and the matching structure will deflect with the main beam or the inner shell, thereby causing the limit matching part to move forward or backward, reducing the gap value between the limit matching part and the limit part adjacent to the front side or the limit part adjacent to the rear side. When the tunnel boring machine is located at the maximum or minimum design slope of the tunnel, the gap between the limit fitting part and the limit fitting part on its front or rear side is zero. If the tunnel boring slope exceeds the maximum or minimum design value due to unexpected circumstances, the limit fitting part will press against the limit fitting part and exert force on the limit fitting part, forcing the limit fitting part and the rear support body to deflect a small amount, thereby ensuring that the swing angle of the vertical and horizontal direction adjustment devices relative to the main beam will not exceed the maximum swing angle allowed by the joint bearings thereon, and ultimately avoiding damage to the joint bearings. When the tunnel boring machine starts to turn left and right, the matching structure swings left and right under the drive of the main beam, which will also reduce the gap between the limit fitting part and the limit fitting part. Similarly, when the turning radius of the tunnel boring machine reaches the designed minimum turning radius, the gap between the limit fitting part and the limit fitting part is zero. If due to unexpected circumstances the turning radius of the tunnel boring machine is smaller than the designed minimum turning radius, the limit fitting part will press against the limit part and exert force on the limit part, forcing the limit part and the rear support body to deflect a small amount, thereby ensuring that the swing angle of the vertical and horizontal direction adjustment devices relative to the main beam does not exceed the maximum swing angle allowed by the joint bearings thereon. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a cross-sectional view from a side view of Example 1 of the roadheader of the present invention; Figure 2 is a cross-sectional view of the rear view of the embodiment 1 of the roadheader of the present invention; Figure 3 is a cross-sectional view from a top view of Embodiment 1 of the roadheader of the present invention; Figure 4 This is a state diagram of the uphill excavation process of the tunnel boring machine of Example 1 of the present invention; Figure 5 It is a state diagram of the side view during the uphill excavation process of the tunnel boring machine of Example 1 of the present invention; Figure 6 It is a state diagram of the roadheader in the left and right turning process of Example 1 of the present invention; Figure 7 This is a state diagram of the tooling used in Example 1 of the tunnel boring machine of the present invention.

[0028] Description of reference numerals: 1. Main beam; 2. Rear support body; 21. Rear support base; 22. Telescopic drive device; 23. Support shoe; 3. Vertical adjustment device; 4. Horizontal adjustment device; 5. Connecting seat; 6. Pin shaft; 7. Mounting seat; 8. Limiting structure; 81. Limiting part; 801. Limiting column; 9. Matching structure; 91. Limiting matching part; 901. Connecting column; 902. Crossbeam; 10. Adapter; 11. Tooling. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with embodiments.

[0030] In order to solve the problems in the prior art, the basic concept of the present invention is to make the rear support body adaptively deflect when the up and down turning range or the left and right turning range of the roadheader exceeds the design value, thereby avoiding damage to the joint bearing.

[0031] Specific embodiment 1 of the tunnel boring machine provided by the present invention: A tunnel boring machine comprises a main beam 1 and a rear support of the tunnel boring machine arranged at the rear end of the main beam 1. In the present invention, the tunnel boring direction of the tunnel boring machine is the front, and the direction in the horizontal plane and perpendicular to the front-rear direction during the horizontal tunnel boring process is the left-right direction.

[0032] See attached Figure 1 , Attachment Figure 2 and attached Figure 3 The rear support of the tunnel boring machine includes a rear support body 2, a limiting structure 8, a matching structure 9, a vertical direction adjustment device 3 connected to the rear support body 2, and a horizontal direction adjustment device 4.

[0033] The rear support body 2 includes a rear support base 21 and telescopic drive devices 22 installed on the left and right sides of the rear support base 21, and the telescopic section of the telescopic drive device 22 is connected with a gripper shoe 23. The two telescopic drive devices 22 can be extended horizontally to the left and right respectively, so that the gripper shoe 23 is tightened on the tunnel wall, so that the entire rear support body 2 is fixed and can provide stable support for the main beam 1, and then the step-changing operation can be performed.

[0034] The vertical direction adjustment device 3 and the horizontal direction adjustment device 4 are both connected between the rear support body 2 and the main beam 1. During the horizontal straight excavation process, the vertical direction adjustment device 3 is in a vertical state, and the horizontal direction adjustment device 4 is in an inclined state. The vertical direction adjustment device 3 can control the up and down swing of the tail of the main beam 1, thereby controlling the uphill or downhill excavation of the tunnel boring machine; the horizontal direction adjustment device 4 can control the left and right swing of the tail of the main beam 1, thereby controlling the left and right steering of the tunnel boring machine.

[0035] The vertical direction adjustment device 3 and the horizontal direction adjustment device 4 are both provided with a connecting seat 5 at one end for connection with the main beam 1. The connecting seat 5 is provided with a connecting hole. A pin 6 is provided in the connecting hole, and a joint bearing is provided between the hole wall of the connecting hole and the pin 6. A mounting seat 7 corresponding to the connecting seat 5 is provided on the main beam 1, and the mounting seat 7 is hinged with the pin 6. During horizontal and straight excavation, the axis of the pin 6 extends in the front-to-back direction, and the axis of the pin 6 coincides with the axis of the connecting hole; during turning excavation, the pin 6 will deflect with the main beam 1, and the axis of the pin 6 will form an angle with the axis of the connecting hole. The joint bearing can allow the pin 6 to deflect within a certain range, that is, it allows the vertical direction adjustment device 3 and the horizontal direction adjustment device 4 to deflect within a certain range relative to the main beam 1.

[0036] The limiting structure 8 is installed on the rear support body 2, and the matching structure 9 is installed at the tail of the main beam 1. The limiting structure 8 includes two limiting parts 81 arranged front and rear, and the matching structure 9 includes a limiting matching part 91 located between the two adjacent limiting parts 81 front and rear, and the front and rear dimensions of the limiting matching part 91 are smaller than the spacing between the two adjacent limiting parts 81 front and rear, so that a gap is left between the limiting matching part 91 and the limiting part 81 adjacent to the front side, and a gap is also left between the limiting matching part 91 and the limiting part 81 adjacent to the rear side during horizontal and linear excavation.

[0037] When the tunnel boring machine starts to dig uphill, see the attached Figure 4 , the rear support body 2 is braced tightly at a lower position on the tunnel wall to leave space for the tail of the main beam 1 to swing downward, and then the rear support of the tunnel boring machine controls the tail of the main beam 1 to gradually swing downward. During this process, the matching structure 9 will also swing along with the main beam 1, and the limit matching part 91 of the matching structure 9 will move forward and obliquely upward, thereby reducing the gap between the limit matching part 91 and the limit matching part 81 in front of it. See attached Figure 5 When the tunnel boring machine is at the maximum slope of uphill tunneling designed during construction, the gap between the limit fitting part 91 and the limit fitting part 81 in front of it is zero. If the tunneling slope exceeds the designed maximum value due to unexpected circumstances, the limit fitting part 91 will press against the limit fitting part 81 and exert a force on the limit fitting part 81, forcing the limit fitting part 81 and the rear support body 2 to deflect a small amount, thereby ensuring that the swing angle of the vertical adjustment device 3 and the horizontal adjustment device 4 relative to the main beam 1 will not exceed the maximum swing angle allowed by the joint bearings thereon.

[0038] During the process of the tunnel boring machine digging uphill in a straight line, after the step change is completed, the rear support body 2 will no longer hold the tunnel wall tightly. At this time, the rear support body 2 is suspended at the tail of the main beam 1 and moves forward with the main beam 1. In this process, the rear support body 2 may shake forward and backward, and the cooperation of the limit matching part 91 and the limit part 81 can also prevent the rear support body 2 from shaking backward, thereby preventing the vertical direction adjustment device 3 and the horizontal direction adjustment device 4 from swinging relative to the main beam 1 beyond the maximum swing angle allowed by the joint bearings thereon.

[0039] The process of downhill excavation by the tunnel boring machine is similar to that of uphill excavation, and will not be described in detail here. The clearance value between the limit fitting part 91 and the limit part 81 is related to the maximum deflection angle allowed by the joint bearing, and the maximum deflection angle allowed by the joint bearing is related to the design value of the maximum slope of the tunnel. Therefore, in different projects, if the design value of the maximum slope of the tunnel changes, the clearance value between the limit fitting part 91 and the limit part 81 can be changed accordingly.

[0040] When the tunnel boring machine is turning left or right, Figure 6 First, the rear support body 2 is braced against the tunnel wall, and then one of the two telescopic drive devices 22 is extended while the other is shortened, so that the rear support base 21 is offset to one side in the left and right directions, but at the same time, the horizontal adjustment device 4 is extended, so that the main beam 1 remains in place, and then the horizontal adjustment device 4 is shortened to control the tail of the main beam 1 to gradually swing to the left or right. In this process, the matching structure 9 is driven by the main beam 1 to deflect to the left and right, and the gap between the limit matching part 91 and the limit part 81 will also become smaller. When the turning radius of the tunnel boring machine reaches the designed minimum turning radius, the gap between the limit matching part 91 and the limit part 81 is zero. If, due to unexpected circumstances, the turning radius of the tunnel boring machine is smaller than the designed minimum turning radius, the limit fitting portion 91 will press against the limit portion 81 and exert force on the limit portion 81, forcing the limit portion 81 and the rear support body 2 to deflect a small amount, thereby ensuring that the swing angle of the vertical adjustment device 3 and the horizontal adjustment device 4 relative to the main beam 1 does not exceed the maximum swing angle allowed by the joint bearings thereon.

[0041] During the process of the tunnel boring machine turning left or right, the tail of the main beam 1 will deflect horizontally. For example, when the tunnel boring machine turns left, the tail of the main beam 1 will deflect to the right, and at the same time, the main beam 1 will drive the limit fitting part 91 to move to the right. When the limit fitting part 91 moves to the right, it will also deflect, specifically, the left end of the limit fitting part 91 moves backward and the right end moves forward. However, after the limit fitting part 91 moves to the right, its right end will no longer be limited by the limit fitting part 81, so the maximum deflection amount of the limit fitting part 91 depends on the limit of the limit fitting part 81 on its left end. The limit of the limit fitting part 81 on the left end of the limit fitting part 91 depends on the gap value between the limit fitting part 81 and the limit fitting part 91, and also depends on the relative position of the limit fitting part 81 with the limit fitting part 91 in the left and right directions. Therefore, changing the gap value between the limit fitting part 81 and the limit fitting part 91 or changing the position of the limit fitting part 81 can adapt to different design values ​​of the minimum turning radius in different projects.

[0042] See attached Figure 1 , Attachment Figure 2 And attached Figure 3 In this embodiment, the limiting structure 8 includes four limiting posts 801, and the four limiting posts 801 are distributed in a rectangular shape. Two limiting posts 801 aligned in the front-to-back direction are a row of limiting posts 801, and two limiting posts 801 aligned in the left-to-right direction are a row of limiting posts 801. The four limiting posts 801 are arranged in two rows and two columns. A row of limiting posts 801 constitutes a limiting portion 81, that is, a limiting portion 81 includes two limiting posts 801 arranged at intervals in the left-to-right direction.

[0043] The matching structure 9 includes two connecting columns 901 and two crossbeams 902. The two connecting columns 901 are arranged at intervals in the left-right direction. The extension direction of the two crossbeams 902 is the left-right direction. The two crossbeams 902 are respectively fixedly arranged on the front and rear sides of the lower end of the connecting column 901. The two crossbeams 902 constitute the limiting matching part 91 of the matching structure 9. The two crossbeams 902 are arranged on the front and rear sides of the connecting column 901 to prevent the connecting column 901 from colliding with the limiting column 801 during the swinging process. The two connecting columns 901 and the two limiting columns 801 in the same row are arranged in a staggered manner in the front-to-back direction, which can also ensure that the connecting column 901 will not collide with the limiting column 801 during the swinging process. In other embodiments, the connecting column 901 may not be staggered with the limiting column 801, and only one crossbeam 902 may be provided and fixed on the lower end surface of the connecting column 901, which can also achieve the basic purpose of the present invention, and will not be repeated here.

[0044] The limiting column 801 and the connecting column 901 are both supported by I-beams, and the cross beam 902 is made of channel steel. In other embodiments, the limiting column 801, the connecting column 901 and the cross beam 902 can also be processed from other profiles. The profile has a high strength, which can prevent the limiting column 801 or the connecting column 901 from bending and deforming too quickly during the application process and failing to play a good limiting role. Moreover, the profile used for processing the limiting column 801 and the cross beam 902 in this embodiment needs to have a flat side. Specifically, the side of the limiting column 801 used to cooperate with the cross beam 902 is a plane, and the side of the cross beam 902 used to cooperate with the limiting column 801 is also a plane. In this way, when the cross beam 902 is pressed against the limiting column 801, the corresponding plane on the cross beam 902 and the corresponding plane on the limiting column 801 are driven to fit, making it easier for the limiting column 801 to follow the deflection of the cross beam 902.

[0045] The limiting structure 8 and the matching structure 9 in this embodiment both have a relatively simple structure with good strength, and the limiting column 801 is used as the limiting part 81 and the beam 902 is used as the limiting matching part 91, which can ensure that the beam 902 can still cooperate with each other to play a limiting role after moving up and down or left and right within a certain range relative to the limiting column 801.

[0046] See attached Figure 1 and attached Figure 5 The limiting column 801 is the main part of the limiting structure 8, the connecting column 901 and the cross beam 902 are the main parts of the matching structure 9, and the limiting structure 8 and the matching structure 9 include a connecting piece 10 in addition to the main part, one end of the connecting piece 10 is a fixed connecting end, and the other end is a detachable connecting end. The fixed connecting end is used to be fixedly connected to the rear support body 2 or the main beam 1, and the detachable connecting end is used to be connected to the main part through a detachable fastener.

[0047] Taking the limiting structure 8 as an example, the fixed connection end of the adapter 10 of the limiting structure 8 is fixedly mounted on the rear support body 2 by welding, and the detachable connection end of the adapter 10 is provided with a threaded hole, and the detachable fastener connecting the limiting column 801 and the adapter 10 is a bolt matched with the threaded hole on the adapter 10. In other embodiments, the adapter 10 and the rear support body 2 can also be fixedly connected by bolts. In other embodiments, the detachable fastener can be a nut matched with the threaded rod on the adapter 10, which will not be described in detail here.

[0048] After long-term use, if the limiting column 801 or the connecting column 901 or the cross beam 902 is worn or deformed and cannot be used any more, the old limiting column 801 or the connecting column 901 and the cross beam 902 can be removed and replaced with new limiting columns 801 or the connecting column 901 and the cross beam 902 for continued use. Of course, in other embodiments, the adapter 10 may not be provided, and the limiting column 801 may be directly welded and fixed to the rear support body 2, and the connecting column 901 may be directly welded and fixed to the main beam 1.

[0049] At least two installation positions are provided on the adapter 10, and the installation positions are arranged front to back or left to right, so that the position of the main part can be adjusted according to different working conditions. The adapter 10 can be in an integrated form. For example, in one embodiment, only one adapter 10 is provided in the limiting structure 8, but the adapter 10 is connected to four limiting columns 801, and a group of threaded holes are provided at the position where the adapter 10 is connected to the limiting column 801, and the four groups of threaded holes constitute one installation position. The adapter 10 can also be in a split form. For example, in one embodiment, each limiting column 801 in the limiting structure 8 corresponds to one adapter 10, and four adapters 10 constitute one installation position.

[0050] When the gap value between the limiting matching part 91 and the limiting part 81 needs to be changed, the front row of limiting columns 801 can be moved forward and backward, or the rear row of limiting columns 801 can be moved forward and backward, or the front row of limiting columns 801 can be moved forward and backward while the rear row of limiting columns 801 can be moved forward and backward. By changing the gap value between the limiting matching part 91 and the limiting part 81, the rear support of the roadheader can adapt to different maximum slope values ​​designed in different projects.

[0051] When the position of the limiting portion 81 needs to be changed, the limiting columns 801 on the left can be moved left or right, or the limiting columns 801 on the right can be moved left or right, or the limiting columns 801 on the left can be moved left or right while the limiting columns 801 on the right can be moved left or right.

[0052] The structure of the rear support of the tunnel boring machine in the Kai type TBM is similar to that of the rear support of the tunnel boring machine in the main beam type 1 TBM. The main difference is that the rear support of the tunnel boring machine in the Kai type TBM is installed at the tail of the inner Kai.

[0053] The vertical direction adjustment device 3, the horizontal direction adjustment device 4 and the telescopic drive device 22 in this embodiment are all oil cylinders. In other embodiments, they can also be air cylinders or electric push rods, which will not be described in detail here.

[0054] See attached Figure 7 In this embodiment, the rear support body 2 can be used in conjunction with a tooling 11 for providing support for the support shoe 23, so as to adapt to tunnel walls at different positions. The tooling 11 is a prior art and will not be described in detail here.

[0055] In other implementations of this embodiment, the rear support body may not be limited to the form of horizontally supporting the hole wall to the left and right sides, but may also be, for example, the rear support in the Chinese invention patent application with application publication number CN116658180A, which will not be repeated here.

[0056] Specific embodiment 2 of the tunnel boring machine provided by the present invention: This embodiment is based on the embodiment 1, and the difference from the embodiment 1 is that the limiting structure in this embodiment is installed on the cross beam, and the matching structure is installed on the rear support body. After the installation positions of the limiting structure and the matching structure are changed, their working principles are still the same as those of the embodiment 1, and will not be described in detail here.

[0057] Specific embodiment 3 of the tunnel boring machine provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that the limiting portion in this embodiment only includes one limiting column, and only one connecting column of the matching structure is also provided.

[0058] Specific embodiment 4 of the tunnel boring machine provided by the present invention: This embodiment is based on the first embodiment, and the difference from the first embodiment is that in this embodiment, three limiting parts are provided, that is, three rows of limiting posts are provided in a front-to-back arrangement, and two limiting matching parts are provided, that is, two sets of combined structures of cross beams and connecting posts are provided. The three rows of limiting posts have two interval spaces in the front-to-back direction, and the two sets of cross beams and connecting posts are respectively in the two interval spaces.

[0059] Compared with Example 1, the limiting structure and the matching structure in this embodiment are stronger and therefore have a longer service life.

[0060] Specific embodiment 5 of the tunnel boring machine provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that the limiting structure in this embodiment is a U-shaped member, and the two arms of the U-shaped member respectively constitute two limiting parts, so the two limiting parts in this embodiment are integrally connected.

[0061] Specific embodiment 6 of the tunnel boring machine provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that the main parts of the limiting structure and the matching structure in this embodiment are non-profiles. Specifically, the limiting part of the limiting structure is two limiting plates arranged front and back, and the matching structure is a matching plate located between the limiting plates, and the lower end of the matching plate constitutes the limiting matching part.

[0062] Specific embodiment 7 of the tunnel boring machine provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that the limiting columns, connecting columns and cross beams in this embodiment are all made of round steel pipes, and their mutual connection relationships are the same, which will not be elaborated here.

[0063] The specific embodiment of the rear support of the tunnel boring machine provided by the present invention is as follows: The rear support of the tunnel boring machine is the rear support of the tunnel boring machine in any one of the specific embodiments 1-7 of the tunnel boring machine mentioned above, which will not be described in detail here.

[0064] 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 rear support for a roadheader, comprising a rear support body, a vertical direction adjustment device and a horizontal direction adjustment device connected to the rear support body, characterized in that: It also includes a limiting structure and a matching structure, one of which is installed on the rear supporting body and the other is used to be installed on the main beam or the inner cover, the limiting structure includes at least two limiting parts arranged in the front and rear, and the matching structure includes a limiting matching part located between two adjacent limiting parts in the front and rear, and a gap is left between the limiting matching part and the limiting part adjacent to the front side and / or the limiting part adjacent to the rear side.

2. The rear support of the tunnel boring machine according to claim 1, characterized in that: The limiting portion comprises at least two limiting columns which are spaced apart from each other on the left and right sides, and the limiting matching portion is a beam extending in the left and right directions.

3. The rear support of the tunnel boring machine according to claim 2, characterized in that: The matching structure includes a connecting column, one end of which in the length direction is fixedly connected to the cross beam, and two cross beams are provided and are respectively located at the front and rear sides of the connecting column.

4. The rear support of the tunnel boring machine according to claim 2, characterized in that: The matching structure comprises at least two connecting columns which are spaced apart from each other on the left and right sides, and one end of the connecting column in the length direction is fixedly connected to the crossbeam.

5. The rear support of the tunnel boring machine according to claim 3 or 4, characterized in that: The limiting column and the connecting column are arranged in a staggered manner in the front-rear direction.

6. The rear support of the roadheader according to any one of claims 1 to 4, characterized in that: The side surfaces of the limiting matching portion used to match with the limiting portion are all planes, and the side surfaces of the limiting portion used to match with the limiting matching portion are all planes.

7. The rear support of the roadheader according to any one of claims 1 to 4, characterized in that: The limiting structure and the matching structure both include a main body and a transition piece. The transition piece is used for fixed connection with the rear support body or the main beam or the inner cover. The transition piece and the main body are connected by a detachable fastener.

8. The rear support of the tunnel boring machine according to claim 7, characterized in that: The adapter is provided with at least two mounting positions for mounting the main body part, and the mounting positions are arranged front to back or left to right.

9. The rear support of the roadheader according to any one of claims 1 to 4, characterized in that: The main parts of the limiting structure and the matching structure are profiles.

10. A roadheader, comprising a main beam or an inner beam, and a rear support of the roadheader, characterized in that: The rear support of the tunnel boring machine is the rear support of the tunnel boring machine as described in any one of claims 1-9.

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