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 tunnel construction equipment. The rear support of the heading machine comprises a supporting arm assembly, a vertical direction adjusting device and a horizontal direction adjusting device, the supporting arm assembly comprises a supporting arm mounting base and a moving base which is arranged on the supporting arm mounting base in a guiding mode and can move on the supporting arm mounting base in a guiding mode in the left-right direction, and the vertical direction adjusting device and the horizontal direction adjusting device are both installed on the moving base. A moving driving device used for driving the moving base to move is arranged on the supporting arm mounting base, and a supporting structure used for tightly supporting the tunnel wall leftwards and rightwards is arranged on the supporting arm mounting base. The heading machine comprises the heading machine rear support. The vertical direction adjusting device and the horizontal direction adjusting device are arranged on the moving seat capable of moving left and right on the supporting arm mounting seat, so that the moving seat can be used for driving the tail end of the main beam or the inner yoke to have larger left-right deflection amplitude, a supporting shoe tool does not need to be used, and the construction efficiency is improved.

Description

Technical Field

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

[0002] Full-face hard rock tunnel boring machine, referred to as TBM, is a special equipment for tunnel excavation in hard rock areas. According to the working principle and structural form of TBM, TBM includes shield type and open type. Open type TBM is further divided into keel type TBM and main beam type TBM. Open type TBM is equipped with a rear support at the tail end of the inner keel or main beam to support the inner keel or main beam when the TBM changes steps.

[0003] The traditional rear support includes a base and a leg arranged on the base and supported downward or obliquely downward to the tunnel wall. In order to meet the horizontal and vertical adjustment needs, horizontal and vertical adjustment cylinders are also arranged between the base and the main beam or the inner support, such as the rear support in the single-support type open full-section tunnel boring machine disclosed in the Chinese utility model patent with authorization announcement number CN202788865U.

[0004] There are some problems with the traditional rear support during use. For example, when the rock layer is relatively broken, there is a lot of slag accumulated at the bottom of the tunnel. During the excavation process, the bottom slag needs to be cleaned up in time to ensure normal excavation. However, the traditional rear support will directly support these slag. On the one hand, it will affect the slag cleaning operation. On the other hand, the slag at the bottom of the tunnel also affects the support stability of the rear support; the extension and shortening of the horizontal adjustment cylinder can control the left and right swing of the tail end of the main beam or the inner shell and thus realize the change of the excavation direction of the tunnel boring machine, but the amplitude of this horizontal adjustment is limited. The reason is that when the tail end of the main beam or the inner shell swings left and right, the upper end of the vertical adjustment cylinder needs to swing in the corresponding direction, thereby tilting the vertical adjustment cylinder. When the left and right swing amplitude of the tail end of the main beam or the inner shell is too large, the inclination amplitude of the vertical adjustment cylinder will also be relatively large, so the main beam or the inner shell will collide and interfere with the vertical adjustment cylinder.

[0005] The existing Chinese utility model patent application with authorization announcement number CN222162616U discloses a rear support of a tunnel boring machine and a tunnel boring machine, wherein the rear support includes a support arm assembly, a horizontal adjustment cylinder and a vertical adjustment cylinder connected between the support arm assembly and the inner shell, the support arm assembly includes a support arm mounting seat and two support cylinders that are respectively telescopic in the left and right directions, the fixed end of the support cylinder is connected to the support arm mounting seat, and the telescopic end is connected to a support body that can be pressed against the tunnel wall. In the process of changing steps, the two support cylinders extend to the left and right respectively and use the support body to hold the tunnel wall tightly, which does not affect the slag cleaning operation at the bottom of the tunnel and can also ensure that the rear support is well supported; in addition, when steering is required, one of the support cylinders on the left and right sides can be shortened and the other support cylinder can be extended to make the support arm mounting seat move left and right as a whole, and with the assistance of the horizontal adjustment cylinder, a larger adjustment range can be obtained.

[0006] However, the horizontal adjustment range of the above-mentioned rear support is still limited. In special circumstances, when the main beam or the tail end of the inner shell needs to have a large offset to obtain a smaller turning radius, it is still difficult to meet the construction needs. The main reason is: in order to ensure construction safety, the relevant construction specifications require that the support body at the end of the support cylinder be kept at a distance of more than 300mm from the tunnel wall when changing steps, which results in a smaller cylinder installation distance of the support cylinder, that is, when the support cylinder is in a retracted state, the distance between its fixed end and the telescopic end is smaller, which also means that the stroke of the support cylinder is shorter. Therefore, when the tail end of the main beam or the inner shell needs to swing a large amplitude in the horizontal direction, one of the support cylinders needs to be fully retracted to make the tail end of the main beam or the inner shell as close to one side of the tunnel wall as possible, and the other support cylinder will not be able to be tightened to the tunnel wall due to insufficient stroke.

[0007] Faced with this situation, construction sites often install additional shoe grippers on the supports that cannot be tightened to the tunnel wall. The length of the shoe grippers is greater than or equal to the distance between the supports that cannot be tightened to the tunnel wall and the tunnel wall, thereby ensuring normal step changes. However, during tunnel excavation, the turning radius of the tunnel may change. At this time, it is necessary to replace shoe grippers of different sizes according to actual needs; or the turning direction changes. At this time, it is necessary to replace the left shoe gripper to the right, or replace the right shoe gripper to the left according to the working conditions. Although installing shoe grippers can meet the needs of construction, the constant replacement and adjustment of shoe grippers will take a lot of time, seriously affecting construction efficiency. Summary of the invention

[0008] The object of the present invention is to provide a rear support of a tunnel boring machine and a tunnel boring machine, so as to solve the technical problem in the prior art that the rear support needs to be equipped with support shoe tooling when adjusting the direction with a small turning radius, which affects the construction efficiency.

[0009] Another object of the present invention is to provide a tunneling machine to solve the above technical problems.

[0010] 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 support arm assembly, a vertical direction adjustment device and a horizontal direction adjustment device. The support arm assembly includes a support arm mounting seat and a moving seat which is guided and arranged on the support arm mounting seat and can be guided and moved in left and right directions on the support arm mounting seat. The vertical direction adjustment device and the horizontal direction adjustment device are both installed on the moving seat. The support arm mounting seat is provided with a moving drive device for driving the moving seat to move. The support arm mounting seat is provided with a supporting structure for supporting the tunnel wall to the left and right.

[0011] As a further improvement, the movable seat is a cylindrical structure and is sleeved on the outer side of the support arm mounting seat.

[0012] As a further improvement, the moving seat is provided with a long hole whose length direction is in the same direction as the left-right direction, and the support arm mounting seat is provided with a connecting support, the connecting support is located in the long hole, and the end of the connecting support away from the support arm mounting seat extends out of the moving seat and is connected to the mobile drive device, and the moving seat is provided with an output support for connecting to the output end of the mobile drive device.

[0013] As a further improvement, one end of the support arm mounting seat is provided with a first support body for supporting the hole wall on the corresponding side, the other end of the support arm mounting seat is provided with a telescopic arm that cooperates with the support arm mounting seat in the left and right directions, and the end of the telescopic arm away from the support arm mounting seat is provided with a second support body for supporting the hole wall on the corresponding side, and a telescopic drive device for driving the telescopic arm to extend and retract is provided between the telescopic arm and the support arm mounting seat, and the telescopic arm, the telescopic drive device, the first support body and the second support body constitute a supporting structure.

[0014] As a further improvement, the support arm mounting seat and the telescopic arm are both cylindrical structures, the telescopic arm is nested inside the support arm mounting seat, and the ends of the telescopic arm and the support arm mounting seat that are away from each other are provided with sealing plates, and the two ends of the telescopic drive device are respectively connected to the sealing plate of the telescopic arm and the sealing plate of the support arm mounting seat.

[0015] As a further improvement, an auxiliary support body is provided on the inner side wall of one end of the moving seat close to the telescopic arm, and the auxiliary support body is slidably matched with the outer side wall of the telescopic arm and provides support for the corresponding end of the moving seat.

[0016] As a further improvement, the auxiliary support body is a support ring.

[0017] As a further improvement, the auxiliary support body is detachably connected to the movable seat.

[0018] As a further improvement, a first extension arm and a second extension arm are respectively provided at both ends of the support arm mounting seat for guiding and cooperating with the support arm mounting seat along the left and right directions, and a telescopic drive device is provided between the first extension arm and the support arm mounting seat and between the second extension arm and the support arm mounting seat. The ends of the first extension arm and the second extension arm are respectively provided with a first support body and a second support body for supporting the hole wall on the corresponding sides, and the first extension arm, the second extension arm, the first extension drive device, the second extension drive device, the first support body and the second support body constitute a supporting structure.

[0019] The beneficial effect is that the rear support of the tunnel boring machine provided by the present invention belongs to the invention of changing the relationship between elements. The movable seat in the rear support of the tunnel boring machine can be moved steplessly under the drive of the movable driving device, so as to drive the tail end of the inner shell to swing at any amplitude, and there is no need to use the support shoe tooling in the prior art, thus effectively enhancing the convenience of construction, and eliminating the disassembly and assembly work of the support shoe tooling, saving construction time and improving the overall construction efficiency.

[0020] 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 beam or an inner beam and a rear support arranged at the tail end of the main beam or the inner beam, the rear support comprises a support arm assembly, a vertical direction adjustment device and a horizontal direction adjustment device, the support arm assembly comprises a support arm mounting seat and a moving seat which is guided and arranged on the support arm mounting seat and can be guided and moved in the left and right directions on the support arm mounting seat, the vertical direction adjustment device and the horizontal direction adjustment device are both installed on the moving seat, the support arm mounting seat is provided with a moving drive device for driving the moving seat to move, and the support arm mounting seat is provided with a support structure for supporting the tunnel wall to the left and right.

[0021] As a further improvement, the movable seat is a cylindrical structure and is sleeved on the outer side of the support arm mounting seat.

[0022] As a further improvement, the moving seat is provided with a long hole whose length direction is in the same direction as the left-right direction, and the support arm mounting seat is provided with a connecting support, the connecting support is located in the long hole, and the end of the connecting support away from the support arm mounting seat extends out of the moving seat and is connected to the mobile drive device, and the moving seat is provided with an output support for connecting to the output end of the mobile drive device.

[0023] As a further improvement, one end of the support arm mounting seat is provided with a first support body for supporting the hole wall on the corresponding side, the other end of the support arm mounting seat is provided with a telescopic arm that cooperates with the support arm mounting seat in the left and right directions, and the end of the telescopic arm away from the support arm mounting seat is provided with a second support body for supporting the hole wall on the corresponding side, and a telescopic drive device for driving the telescopic arm to extend and retract is provided between the telescopic arm and the support arm mounting seat, and the telescopic arm, the telescopic drive device, the first support body and the second support body constitute a supporting structure.

[0024] As a further improvement, the support arm mounting seat and the telescopic arm are both cylindrical structures, the telescopic arm is nested inside the support arm mounting seat, and the ends of the telescopic arm and the support arm mounting seat that are away from each other are provided with sealing plates, and the two ends of the telescopic drive device are respectively connected to the sealing plate of the telescopic arm and the sealing plate of the support arm mounting seat.

[0025] As a further improvement, an auxiliary support body is provided on the inner side wall of one end of the moving seat close to the telescopic arm, and the auxiliary support body is slidably matched with the outer side wall of the telescopic arm and provides support for the corresponding end of the moving seat.

[0026] As a further improvement, the auxiliary support body is a support ring.

[0027] As a further improvement, the auxiliary support body is detachably connected to the movable seat.

[0028] As a further improvement, a first extension arm and a second extension arm are respectively provided at both ends of the support arm mounting seat for guiding and cooperating with the support arm mounting seat along the left and right directions, and a telescopic drive device is provided between the first extension arm and the support arm mounting seat and between the second extension arm and the support arm mounting seat. The ends of the first extension arm and the second extension arm are respectively provided with a first support body and a second support body for supporting the hole wall on the corresponding sides, and the first extension arm, the second extension arm, the first extension drive device, the second extension drive device, the first support body and the second support body constitute a supporting structure.

[0029] The beneficial effect is that the tunnel boring machine provided by the present invention belongs to the invention of changing the relationship between elements. The movable seat in the rear support of the tunnel boring machine can be moved steplessly under the drive of the movable driving device, so that the tail end of the inner shell can be driven to swing at any amplitude, and the support shoe tooling in the prior art does not need to be used, thereby effectively enhancing the convenience of construction, and eliminating the disassembly and assembly work of the support shoe tooling, saving construction time, and improving the overall construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the use state of Example 1 of the rear support of the roadheader in the present invention; Figure 2 It is a cross-sectional view of Embodiment 1 of the rear support of the roadheader in the present invention; Figure 3 A cross-sectional view of a tunnel boring machine used in Example 1 of the tunnel boring machine rear support of the present invention when the tunnel boring machine is advancing forward; Figure 4 A cross-sectional view of a roadheader when changing steps, as applied to the embodiment 1 of the roadheader rear support of the present invention; Figure 5 A cross-sectional view of a roadheader used in Example 1 of the rear support of the roadheader of the present invention when the roadheader is adjusted; Figure 6 It is a cross-sectional view of Embodiment 3 of the rear support of the roadheader in the present invention; Figure 7 A cross-sectional view of an implementation manner of Example 5 of the rear support of the roadheader in the present invention; Figure 8 A cross-sectional view of another implementation manner of Example 5 of the rear support of the roadheader in the present invention; Fig. 9 It is a cross-sectional view of Example 6 of the rear support of the tunnel boring machine in the present invention.

[0031] Description of reference numerals: 1. Neike; 2. Vertical direction-adjusting device; 3. Horizontal direction-adjusting device; 4. Support arm mounting seat; 5. Moving seat; 6. Moving drive device; 7. Long hole; 8. Connecting support; 9. Output support; 10. Telescopic arm; 11. Telescopic drive device; 12. First support body; 13. Second support body; 14. Limiting step; 15. Auxiliary support body; 16. First extension arm; 17. Second extension arm; 18. First extension drive device; 19. Second extension drive device. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with embodiments.

[0033] To solve the problems in the prior art, the basic concept of the present invention is to move the vertical adjustment device and the horizontal adjustment device as a whole on the support arm mounting seat in the left and right directions to obtain a larger adjustment range without setting the support shoe tooling.

[0034] Specific embodiment 1 of the rear support of the tunnel boring machine provided by the present invention: The present invention takes the excavation direction of the tunnel boring machine as the front, and the left and right directions are in the horizontal plane and perpendicular to the front and rear directions.

[0035] See attached Figure 1 Combined with the attached Figure 2 The rear support of the tunnel boring machine includes a support arm assembly, a vertical adjustment device 2 and a horizontal adjustment device 3. The lower end of the vertical adjustment device 2 is connected to the support arm assembly, and the upper end can be connected to the inner Kai 1 through an ear seat. One end of the horizontal adjustment device 3 is connected to the support arm assembly, and the other end can be connected to the inner Kai 1 through an ear seat. This embodiment is described by taking the rear support used for the Kai-type TBM as an example. In other embodiments, for the main beam TBM, the vertical adjustment device 2 and the horizontal adjustment device 3 can be connected to the main beam through the ear seat respectively. The vertical adjustment device 2 and the horizontal adjustment device 3 are both oil cylinders, and in other embodiments, they can also be air cylinders or electric cylinders.

[0036] The support arm assembly includes a support arm mounting seat 4, a moving seat 5, a moving drive device 6 and a supporting structure.

[0037] The support arm mounting seat 4 is a cylindrical structure extending in the left-right direction, and its cross-section shape when measured by a plane perpendicular to the left-right direction is a square.

[0038] The moving seat 5 is guided and arranged on the support arm mounting seat 4 and can be guided and moved in the left and right directions on the support arm mounting seat 4. Specifically, the moving seat 5 is also a cylindrical structure with a square cross section, and the moving seat 5 is sleeved on the outer side of the support arm mounting seat 4. Since the moving seat 5 and the support arm mounting seat 4 are both square in cross section, the moving seat 5 and the support arm mounting seat 4 can be prevented from rotating relative to each other.

[0039] The mobile driving device 6 is used to drive the mobile seat 5 to move left and right. The mobile seat 5 is provided with a long hole 7, the length direction of the long hole 7 is in the same direction as the left and right direction, the support arm mounting seat 4 is provided with a connecting support 8, the connecting support 8 is located in the long hole 7 and the end of the connecting support 8 away from the support arm mounting seat 4 extends out of the mobile seat 5, and the mobile seat 5 is provided with an output support 9. The mobile driving device 6 is a cylinder, the cylinder body of the mobile driving device 6 is connected to the connecting support 8 through a pin shaft, and the output end of the mobile driving device 6 is connected to the output support 9 through a pin shaft. The connecting support 8 is arranged in the long hole 7. On the one hand, it can be arranged close to the middle position of the support arm assembly, and on the other hand, the cooperation between the connecting support 8 and the long hole 7 also plays a role in guiding the mobile seat 5.

[0040] The support structure is used to hold the tunnel wall to the left and right. Specifically, in this embodiment, the support structure includes a telescopic arm 10, a telescopic drive device 11, a first support body 12 and a second support body 13. The telescopic arm 10 is a cylindrical structure with a square cross section. The telescopic arm 10 is nested inside the support arm mounting seat 4 and forms a guide match with the support arm mounting seat 4. One end of the support arm mounting seat 4 is closed by a sealing plate and the other end is open. The telescopic arm 10 is located at the open end of the support arm mounting seat 4 and can extend from this end and retract into the support arm mounting seat 4. The end of the telescopic arm 10 located outside the support arm mounting seat 4 is also closed by a sealing plate. The inner side of the support arm mounting seat 4 is provided with a limiting step 14 for stopping and cooperating with the telescopic arm 10 after the telescopic arm 10 is retracted into the support arm mounting seat 4 to limit the retraction direction of the telescopic arm 10. The telescopic drive device 11 is a cylinder, and the telescopic drive device 11 is located inside the telescopic arm 10 and the support arm mounting seat 4. One end of the telescopic drive device 11 is connected to the sealing plate on the telescopic arm 10, and the other end is connected to the sealing plate on the support arm mounting seat 4. The first support body 12 is fixedly arranged at one end of the support arm mounting seat 4 where the sealing plate is arranged, and the second support body 13 is located at one end of the telescopic arm 10 where the sealing plate is arranged.

[0041] During the forward excavation of the tunnel boring machine to which the tunnel boring machine rear support is applied, see the attached Figure 3The rear support of the tunnel boring machine does not hold the tunnel wall tightly, and moves forward with the inner support 1. The telescopic arm 10 is basically completely retracted into the support arm mounting seat 4. At the same time, the center of the moving seat 5 in the left and right directions also coincides with the center of the support arm mounting seat 4 in the left and right directions. The left and right length of the entire support arm assembly is in the shortest state.

[0042] When you need to change steps, see the attached Figure 4 The telescopic arm 10 extends out of the support arm mounting seat 4 so that the left and right length of the entire support arm assembly can reach the longest. At the same time, the movable seat 5 moves on the support arm mounting seat 4 toward the telescopic arm 10, so that the combination formed by the support arm mounting seat 4 and the telescopic arm 10 is extended while remaining centered in the left and right directions, thereby enabling the first support body 12 and the second support body 13 to synchronously support the cave wall.

[0043] After tightening the cave wall, the movable seat 5 is located in the middle position of the combination formed by the support arm mounting seat 4 and the telescopic arm 10. When it is necessary to adjust the direction left or right, the mobile driving device 6 is used to directly drive the movable seat 5 to move toward one end of the support arm mounting seat 4, and then the movable seat 5 can be used to drive the tail end of the inner Kai 1 to swing in the corresponding direction to complete the adjustment process.

[0044] Compared with the prior art, the telescopic arm 10 no longer needs to be telescoped relative to the support arm mounting seat 4 during the adjustment process, so there is no need to consider the travel problem of the telescopic drive device 11. In addition, in this embodiment, only one telescopic arm 10 and only one telescopic drive device 11 are provided, which can save the installation space of the telescopic drive device 11 in the left and right directions, so that the support arm mounting seat 4 and the telescopic arm 10 combination can obtain a longer extended length while the size remains unchanged when contracted, so as to adapt to the construction of tunnels with a larger diameter range.

[0045] Moreover, the movable seat 5 can be moved steplessly under the drive of the movable driving device 6, so as to drive the tail end of the inner shell 1 to swing to any amplitude, without the need to use the support shoe tooling in the prior art, thereby effectively enhancing the convenience of construction, eliminating the need for disassembly and assembly of the support shoe tooling, saving construction time, and improving overall construction efficiency.

[0046] In addition, since the movable seat 5 has a large range of movement in the left and right directions, the tail end of the inner Kai 1 can swing more widely without the assistance of the horizontal steering device 3, meeting the construction requirements of a smaller turning radius. Therefore, the vertical steering device 2 may not tilt during the steering process, which is more beneficial to the force of the vertical steering device 2. On the one hand, it can reduce the load borne by the vertical steering device 2, and on the other hand, it can also prevent the ear seat between the vertical steering device 2 and the inner Kai 1 and the ear seat between the vertical steering device 2 and the support arm assembly from being damaged by large tangential stress.

[0047] In another implementation of this embodiment, see the attached Figure 5 When it is necessary to adjust the direction left or right, the mobile driving device 6 can be used to first drive the mobile seat 5 to move toward one end of the support arm mounting seat 4, and at the same time, the horizontal adjustment device 3 is extended to keep the tail end of the inner Kai 1 in place; then the mobile seat 5 remains stationary, the horizontal adjustment device 3 is shortened, and the tail end of the inner Kai 1 is pulled in the direction of the displacement of the mobile seat 5, so that the tail end of the inner Kai 1 swings. Repeat the above process until the tail end of the inner Kai 1 is offset to a suitable position.

[0048] Then the moving seat 5 can be used to drive the tail end of the inner case 1 to swing in the corresponding direction to complete the direction adjustment process.

[0049] Specific embodiment 2 of the rear support of the tunnel boring machine provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that, in this embodiment, the movable seat, the support arm mounting seat and the telescopic arm are all cylindrical structures, and in this embodiment, the movable seat and the support arm mounting seat are guided by the cooperation of the connecting support and the long hole.

[0050] Specific embodiment 3 of the rear support of the tunnel boring machine provided by the present invention: This embodiment is based on embodiment 1, and the difference from embodiment 1 is that, see attached Figure 6 In this embodiment, the long hole 7 is not provided on the movable seat 5. In this embodiment, the connecting support 8 is provided at an end of the support arm mounting seat 4 away from the telescopic arm 10.

[0051] Specific embodiment 4 of the rear support of the tunnel boring machine provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that, in this embodiment, the support arm mounting seat, the movable seat and the telescopic arm are all non-cylindrical solid structures.

[0052] Specifically, dovetail-shaped guide grooves extending in the left-right direction are provided on the upper and lower surfaces of the support arm mounting seat, a guide rail for guiding and cooperating with the guide groove on the upper surface of the support arm mounting seat is provided on the lower side of the mobile seat, and a guide rail for guiding and cooperating with the guide groove on the lower surface of the support arm mounting seat is provided on the upper side of the telescopic arm. The mobile drive device and the telescopic drive device are respectively connected between the mobile seat and the support arm mounting seat, and between the telescopic arm and the support arm mounting seat in a hinged manner.

[0053] Specific embodiment 5 of the rear support of the tunnel boring machine provided by the present invention: This embodiment is based on embodiment 1, and the difference from embodiment 1 is that, see attached Figure 7In this embodiment, an auxiliary support body 15 is provided on the inner side of one end of the movable seat 5 close to the telescopic arm 10 . The auxiliary support body 15 is slidably matched with the outer wall of the telescopic arm 10 . The auxiliary support body 15 is used to provide support for the corresponding end of the movable seat 5 .

[0054] In Example 1, the end of the moving seat 5 close to the telescopic arm 10 is not in direct contact with the telescopic arm 10. Therefore, when the moving seat 5 moves in the direction of the telescopic arm 10, the corresponding end of the moving seat 5 will be in a suspended state. After long-term use, this end of the moving seat 5 may be partially deformed by the downward pressure of the vertical direction adjustment device 2, and it is difficult to slide smoothly on the support arm mounting seat 4. In addition, since the top of the moving seat 5 is subjected to the pressure of the vertical direction adjustment device 2, the top of the moving seat 5 is prone to eccentric wear with the end of the support arm mounting seat 4 close to the telescopic arm 10, thereby affecting the service life of the rear support. In this embodiment, the auxiliary support body 15 is used to support the corresponding end of the moving seat 5, which can avoid deformation of the moving seat 5 and eccentric wear between the moving seat 5 and the support arm mounting seat 4, thereby ensuring that the moving seat 5 has a longer service life.

[0055] Specifically, the auxiliary support body 15 is a support ring. In this embodiment, since the cross-sections of the moving base 5 and the telescopic arm 10 are both square, the auxiliary support body 15 is a square support ring, which ensures that the auxiliary support body 15 can provide good support in all directions for the moving base 5. In addition, the support ring also has the function of strengthening the corresponding end of the moving base 5, improving the anti-deformation ability of the corresponding end of the moving base 5, and further preventing the corresponding end of the moving base 5 from being deformed.

[0056] In addition, the auxiliary support body 15 in this embodiment also has the function of scraping off sand and other debris on the telescopic arm 10 and preventing the debris from entering the gap between the telescopic arm 10 and the support arm mounting seat 4. If the debris enters the gap between the telescopic arm 10 and the support arm mounting seat 4, it will cause the matching surface of the telescopic arm 10 and the support arm mounting seat 4 to wear too quickly, affecting the service life of the rear support. The auxiliary support body 15 can extend the service life of the rear support.

[0057] In this embodiment, the auxiliary support body 15 is detachably connected to the movable seat 5 by bolts. Specifically, the corresponding ends of the movable seat 5 are provided with threaded holes for installing bolts in the left and right directions, and corresponding connection holes for the bolts to pass through are provided on the auxiliary support body 15. Since the auxiliary support body 15 needs to withstand pressure and needs to scrape off debris on the telescopic arm 10, it wears out quickly. Setting it into a detachable structure can facilitate quick replacement when it fails.

[0058] See attached Figure 8In other implementations of this embodiment, in order to prevent debris from entering between the movable seat 5 and the support arm mounting seat 4, the long hole 7 may not be provided on the movable seat 5, and the connecting support 8 may be provided at an end of the support arm mounting seat 4 away from the telescopic arm 10.

[0059] In other implementations of this embodiment, the auxiliary support body 15 may be block-shaped and only installed at the top position of the moving base 5 .

[0060] In other implementations of this embodiment, the auxiliary support body 15 is made of wear-resistant material, so its service life is longer and it can be connected to the movable seat 5 in an undetachable manner.

[0061] Specific embodiment 6 of the rear support of the tunnel boring machine provided by the present invention: This embodiment is based on embodiment 1, and the difference from embodiment 1 is that, see attached Fig. 9 The supporting structure in this embodiment includes a first extension arm 16, a second extension arm 17, a first extension drive device 18, a second extension drive device 19, a first support body 12 and a second support body 13.

[0062] The first extension arm 16 and the second extension arm 17 are respectively installed at the two ends of the support arm mounting seat 4 in a guiding manner, the first extension drive device 18 is respectively arranged between the first extension arm 16 and the support arm mounting seat 4, and between the second extension arm 17 and the support arm mounting seat 4, the first support body 12 and the second support body 13 are respectively arranged at the ends of the first extension arm 16 and the second extension arm 17 and are used to support the cave wall on the corresponding side.

[0063] Specifically, the support arm mounting base 4, the first extension arm 16, and the second extension arm 17 are all cylindrical structures. The first extension arm 16 and the second extension arm 17 are respectively nested in the inner sides of the two ends of the support arm mounting base 4. The middle part of the support arm mounting base 4 is provided with a partition plate for dividing its inner cavity into two parts. The ends of the first extension arm 16 and the second extension arm 17 are both provided with sealing plates. The first extension drive device 18 is connected between the sealing plate and the partition plate of the first extension arm 16, and the second extension drive device 19 is connected between the sealing plate and the partition plate of the second extension arm 17.

[0064] The specific embodiment of the tunnel boring machine provided by the present invention is as follows: The tunnel boring machine includes a main machine and rear supporting parts. The main machine includes a cutter head, a shield body and an inner shell. The tail of the inner shell is provided with a rear support. The rear support is the tunnel boring machine rear support in the above-mentioned embodiment of the tunnel boring machine rear support, which will not be repeated.

[0065] 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 tunnel boring machine, characterized in that: It includes a support arm assembly, a vertical direction adjustment device and a horizontal direction adjustment device. The support arm assembly includes a support arm mounting seat and a moving seat which is guided and arranged on the support arm mounting seat and can be guided and moved along the left and right directions on the support arm mounting seat. The vertical direction adjustment device and the horizontal direction adjustment device are both installed on the moving seat. The support arm mounting seat is provided with a moving drive device for driving the moving seat to move. The support arm mounting seat is provided with a supporting structure for supporting the tunnel wall to the left and right.

2. The rear support of the tunnel boring machine according to claim 1, characterized in that: The movable seat is a cylindrical structure and is sleeved on the outer side of the supporting arm mounting seat.

3. The rear support of the tunnel boring machine according to claim 2, characterized in that: The movable seat is provided with a long hole whose length direction is in the same direction as the left-right direction, and the support arm mounting seat is provided with a connecting support, which is located in the long hole. The end of the connecting support away from the support arm mounting seat extends out of the movable seat and is connected to the movable drive device. The movable seat is provided with an output support for connecting to the output end of the movable drive device.

4. The rear support of the roadheader according to any one of claims 1 to 3, characterized in that: A first support body for supporting the hole wall on the corresponding side is provided at one end of the support arm mounting seat, a telescopic arm for guiding and cooperating with the support arm mounting seat along the left-right direction is provided at the other end of the support arm mounting seat, a second support body for supporting the hole wall on the corresponding side is provided at one end of the telescopic arm away from the support arm mounting seat, a telescopic driving device for driving the telescopic arm to extend and retract is provided between the telescopic arm and the support arm mounting seat, and the telescopic arm, the telescopic driving device, the first support body and the second support body constitute a supporting structure.

5. The rear support of the tunnel boring machine according to claim 4 is characterized in that: Both the support arm mounting seat and the telescopic arm are cylindrical structures. The telescopic arm is nested inside the support arm mounting seat. The ends of the telescopic arm and the support arm mounting seat that are away from each other are provided with sealing plates. The two ends of the telescopic drive device are respectively connected to the sealing plates of the telescopic arm and the support arm mounting seat.

6. The rear support of the tunnel boring machine according to claim 5, characterized in that: An auxiliary support body is arranged on the inner side wall of one end of the moving seat close to the telescopic arm. The auxiliary support body is slidably matched with the outer side wall of the telescopic arm and provides support for the corresponding end of the moving seat.

7. The rear support of the tunnel boring machine according to claim 6, characterized in that: The auxiliary support body is a support ring.

8. The rear support of the tunnel boring machine according to claim 7, characterized in that: The auxiliary support body is detachably connected to the movable seat.

9. The rear support of the roadheader according to any one of claims 1 to 3, characterized in that: A first extension arm and a second extension arm are respectively arranged at both ends of the support arm mounting seat, which are guided and cooperated with the support arm mounting seat along the left and right directions. A telescopic driving device is arranged between the first extension arm and the support arm mounting seat, and between the second extension arm and the support arm mounting seat. The ends of the first extension arm and the second extension arm are respectively provided with a first supporting body and a second supporting body for supporting the hole wall on the corresponding side. The first extension arm, the second extension arm, the first extension driving device, the second extension driving device, the first support body and the second support body constitute a supporting structure.

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

Images