Reaming stabilizing device and raise boring machine

Abstract

The utility model discloses a broaching stabilizing device and raise boring machine, broaching stabilizing device includes: drill stem, drill stem axial one end is provided with connecting cylinder, connecting cylinder far away from drill stem end face is provided with thread mounting hole and location hole, thread mounting hole and location hole both extend along drill stem axial direction, location hole is located in the peripheral side of thread mounting hole; the reverse cutter head is provided with a threaded mounting shaft, a plurality of reaming cutters are uniformly arranged on the peripheral side of the threaded mounting shaft, and the threaded mounting shaft is assembled in the threaded mounting hole in a threaded mode; the positioning assembly comprises a positioning part and an elastic part, the positioning part is slidably arranged on the reverse cutter head in the axial direction of the threaded mounting shaft, the elastic part is arranged between the reverse cutter head and the positioning part, and the elastic part is used for applying elastic force to the positioning part so that the positioning part can be partially inserted into the positioning hole in the normal state, and rotation of the threaded mounting shaft relative to the connecting cylinder is limited. The reverse cutterhead is convenient to disassemble and assemble, and the working efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of raise boring machines, in particular to a hole expansion stabilizing device and a raise boring machine. Background Art

[0002] The raise boring rig uses the drilling rig's electric motor to drive a hydraulic motor, which in turn drives a swivel. This hydraulic power transmits torque to the drilling tool system, driving the drill pipe and drill bit to rotate. Under the weight on bit (WOB), the cutters on the pilot or reaming bit roll or slide slightly along the rock face at the bottom of the well. Simultaneously, the axial tension and pressure generated by the main engine's oil cylinder also act on the pilot or reaming bit through the power head and drill pipe, causing the pilot bit's cutters to roll under the WOB, generating impact loads that cause the cutter teeth to impact, squeeze, and shear the rock, breaking it. After the drill pipe reaches the bottom of the well from top to bottom, the drill bit is replaced with a reverse cutterhead, which performs reverse reaming from bottom to top.

[0003] However, when the drill bit is replaced with a reverse cutterhead, the reverse cutterhead is mostly inserted into the connecting tube at the bottom of the drill pipe. During the reverse hole expansion process, the connection between the reverse cutterhead and the connecting tube is prone to loosening. Therefore, some structures are often added to improve the stability of the connection between the two. However, the structures in the prior art that increase the stability of the connection between the two usually have the problem of inconvenient disassembly and assembly, resulting in low work efficiency. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides a hole expansion stabilization device that provides a stable connection and facilitates the disassembly and assembly of the reverse cutter head, thereby improving work efficiency.

[0005] The utility model also provides a raise drilling rig comprising the above-mentioned hole expansion stabilization device.

[0006] According to the first embodiment of the present invention, the expansion stabilization device includes:

[0007] A drill rod, wherein one axial end of the drill rod is provided with a connecting tube, and an end surface of the connecting tube away from the drill rod is provided with a threaded mounting hole and a positioning hole, wherein both the threaded mounting hole and the positioning hole extend along the axial direction of the drill rod, and the positioning hole is located on a circumferential side of the threaded mounting hole;

[0008] A reverse cutter disc, wherein the reverse cutter disc is provided with a threaded mounting shaft, and a plurality of reaming tools are evenly arranged on the circumference of the threaded mounting shaft, and the threaded mounting shaft is threadedly assembled in the threaded mounting hole;

[0009] The positioning assembly includes a positioning portion and an elastic portion. The positioning portion is arranged on the reverse cutter disc along the axial sliding of the threaded mounting shaft. The elastic portion is arranged between the reverse cutter disc and the positioning portion. The elastic portion is used to apply elastic force to the positioning portion to keep the positioning portion partially inserted into the positioning hole under normal conditions, thereby limiting the rotation of the threaded mounting shaft relative to the connecting cylinder.

[0010] The hole expansion stabilization device according to the embodiment of the utility model has at least the following beneficial effects:

[0011] By arranging a threaded mounting hole on the connecting tube and a threaded mounting shaft on the reverse cutter disc, the threaded mounting shaft is threadedly assembled in the threaded mounting hole to realize the connection between the reverse cutter disc and the connecting tube, and by arranging a positioning portion on the reverse cutter disc that can elastically move along the axial direction of the threaded mounting shaft, the positioning portion is partially inserted into the positioning hole to limit the rotation of the threaded mounting shaft relative to the connecting tube, thereby preventing the threaded mounting shaft from loosening relative to the connecting tube when the drill rod rotates, thereby ensuring the stability of the threaded connection between the threaded mounting shaft and the connecting tube. When the reverse cutter disc needs to be disassembled, it is only necessary to elastically move the positioning portion to disengage from the positioning hole, and then rotate the threaded mounting shaft to separate the threaded mounting shaft from the connecting tube. The reverse operation can be performed during installation. Through the above arrangement, while ensuring the stability of the connection between the reverse cutter disc and the connecting tube, the disassembly and assembly of the reverse cutter disc is very convenient, which can improve work efficiency.

[0012] According to some embodiments of the present invention, the positioning portion includes an insertion section and an installation section, the insertion section is passed through the reverse cutter disc and is used to be inserted into the positioning hole, the installation section is connected to one end of the insertion section and is located on the side of the reverse cutter disc away from the threaded mounting shaft, and the elastic portion is located on the side of the reverse cutter disc away from the threaded mounting shaft and is used to apply an elastic force to the installation section along the axial direction of the threaded mounting shaft toward the insertion section.

[0013] According to some embodiments of the present invention, a mounting bracket is provided at the end of the reverse cutter disc facing away from the threaded mounting shaft, the mounting section includes a boss and a mounting rod, the boss is connected to one end of the insertion section, the mounting rod is connected to the end of the boss facing away from the insertion section, the mounting rod is slidably arranged on the mounting bracket, the elastic part is configured as a spring, the spring is sleeved on the mounting rod, and both ends respectively abut the mounting bracket and the boss.

[0014] According to some embodiments of the present invention, there are multiple positioning holes, and the multiple positioning holes are evenly distributed on the same circumference around the threaded mounting hole. The positioning holes are arranged in a one-to-one correspondence with the positioning parts.

[0015] According to some embodiments of the present invention, the positioning assembly further includes a linkage portion, which is connected between the plurality of positioning portions and is used to drive the plurality of positioning portions to move synchronously along the axial direction of the threaded mounting shaft away from the positioning hole.

[0016] According to some embodiments of the present invention, a stop portion is movably provided on the reverse cutter disc, and the stop portion has at least a first state and a second state during its movement. When the stop portion is in the first state, the stop portion avoids the axial movement path of the linkage portion along the threaded mounting shaft. When the positioning portion is disengaged from the positioning hole and the stop portion is in the second state, the stop portion blocks the movement path of the linkage portion along the axial direction of the threaded mounting shaft toward the positioning hole, so that the positioning portion remains separated from the positioning hole.

[0017] According to some embodiments of the present invention, the linkage portion is detachably connected to the plurality of positioning portions.

[0018] According to some embodiments of the present invention, the linkage part includes a linkage plate, and the plurality of positioning parts are all slidably arranged on the linkage plate along the axial direction of the threaded mounting shaft. The positioning part is detachably connected to a limiting member on the side of the linkage plate away from the positioning hole, and the limiting member is used to abut against the end of the linkage plate away from the positioning hole.

[0019] According to some embodiments of the present invention, the limiting member includes a limiting nut, and the positioning portion is provided with an external thread for installing the limiting nut.

[0020] The raise boring machine according to the embodiment of the second aspect of the present utility model includes the above-mentioned hole expansion stabilization device.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0023] Figure 1 This is a structural diagram of an embodiment of the utility model when the stopper is in the first state;

[0024] Figure 2 This is a schematic diagram of the installation structure of the positioning assembly of an embodiment of the utility model;

[0025] Figure 3 This is an exploded schematic diagram of the installation structure of the positioning assembly of an embodiment of the utility model;

[0026] Figure 4 It is a structural schematic diagram of an embodiment of the present invention when the stopper is in the second state.

[0027] Figure Number:

[0028] Drill rod 100, connecting tube 110, threaded mounting hole 111, positioning hole 112;

[0029] Reverse cutter head 200, through hole 201, threaded mounting shaft 210, reaming tool 220, mounting bracket 230, rectangular sleeve hole 231, stopper 240, extension column 250, rectangular block 251, screw 252, washer 253, locking nut 254;

[0030] Positioning portion 300, insertion section 310, boss 320, mounting rod 330, limiting nut 340;

[0031] elastic portion 400;

[0032] Linkage plate 500. DETAILED DESCRIPTION

[0033] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0034] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] In the description of this utility model, "a plurality" means more than two. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0036] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0037] Reference Figures 1 to 4 As shown, a hole expansion stabilization device according to an embodiment of the present invention includes: a drill rod 100, a reverse cutter head 200, and a positioning assembly.

[0038] A connecting tube 110 is provided at one axial end of the drill rod 100, and a threaded mounting hole 111 and a positioning hole 112 are provided on the end face of the connecting tube 110 away from the drill rod 100. The threaded mounting hole 111 and the positioning hole 112 both extend along the axial direction of the drill rod 100, wherein the threaded mounting hole 111 is coaxially distributed with the drill rod 100, and the positioning hole 112 is located on the circumferential side of the threaded mounting hole 111, and the positioning hole 112 is a blind hole.

[0039] The reverse cutter head 200 is provided with a threaded mounting shaft 210 . A plurality of reaming tools 220 are evenly arranged around the circumference of the threaded mounting shaft 210 . The threaded mounting shaft 210 is threadedly assembled in the threaded mounting hole 111 .

[0040] The positioning assembly includes a positioning portion 300 and an elastic portion 400. The positioning portion 300 is slidably mounted on the counter cutter head 200 along the axial direction of the threaded mounting shaft 210. The elastic portion 400 is disposed between the counter cutter head 200 and the positioning portion 300. The elastic portion 400 is used to apply an elastic force to the positioning portion 300 along the axial direction of the threaded mounting shaft 210 toward the positioning hole 112, thereby keeping the positioning portion 300 partially inserted into the positioning hole 112 under normal conditions, thereby limiting the rotation of the threaded mounting shaft 210 relative to the connecting cylinder 110. It is apparent that the positioning portion 300 can be elastically moved out of the positioning hole 112 under the action of an external force.

[0041] The expansion stabilizing device of the embodiment of the present invention is provided with a threaded mounting hole 111 on the connecting cylinder 110 and a threaded mounting shaft 210 on the reverse cutter head 200, so that the threaded mounting shaft 210 is threadedly assembled in the threaded mounting hole 111 to realize the connection between the reverse cutter head 200 and the connecting cylinder 110, and a positioning portion 300 that can elastically move along the axial direction of the threaded mounting shaft 210 is provided on the reverse cutter head 200, so that the positioning portion 300 is partially inserted into the positioning hole 112 to limit the rotation of the threaded mounting shaft 210 relative to the connecting cylinder 110, thereby preventing the drill rod 1 from rotating. 00 is rotated, the threaded mounting shaft 210 is loosened relative to the connecting tube 110, ensuring the stability of the threaded connection between the threaded mounting shaft 210 and the connecting tube 110. When the reverse cutter disc 200 needs to be disassembled, it is only necessary to allow the positioning portion 300 to elastically move to disengage from the positioning hole 112, and then rotate the threaded mounting shaft 210 to separate the threaded mounting shaft 210 from the connecting tube 110. The reverse operation can be performed during installation. Through the above arrangement, while ensuring the stability of the connection between the reverse cutter disc 200 and the connecting tube 110, the disassembly and assembly of the reverse cutter disc 200 is very convenient, which can improve work efficiency.

[0042] Reference Figure 1 and Figure 3As shown, in some embodiments of the present invention, the positioning portion 300 includes an insertion section 310 and a mounting section, the insertion section 310 and the mounting section are configured as an integral structure, the insertion section 310 is inserted into the reverse cutter disc 200, and the insertion section 310 is used to insert into the positioning hole 112, wherein the insertion section 310 is in the shape of a cylindrical rod, and the reverse cutter disc 200 is provided with a through hole 201 adapted to the insertion section 310; the mounting section is connected to one end of the insertion section 310, and the mounting section is located on the side of the reverse cutter disc 200 away from the threaded mounting shaft 210, and the elastic portion 400 is located on the reverse cutter disc 200 away from the threaded mounting shaft On one side of the shaft 210, an elastic portion 400 is used to apply an elastic force to the mounting section along the axial direction of the threaded mounting shaft 210 toward the insertion section 310, so that the insertion section 310 can be inserted into the positioning hole 112 and remain inserted into the positioning hole 112. Through this arrangement, the elastic portion 400 can be placed on the side of the reverse cutter head 200 facing away from the drill pipe 100, preventing dust or gravel from adhering to the elastic portion 400 during reverse reaming of the reverse cutter head 200. This also prevents dust or gravel from adhering to the elastic portion 400 and preventing the elastic portion 400 from being unable to produce elastic deformation when the reverse cutter head 200 is disassembled. It is obvious that the elastic portion 400 is located within the projection range of the reverse cutter head 200 along the axial direction of the threaded mounting shaft 210.

[0043] Reference Figure 1 and Figure 3 As shown, in some embodiments of the present invention, a mounting bracket 230 is provided at one end of the reverse cutter disc 200 away from the threaded mounting shaft 210, and the mounting section includes a boss 320 and a mounting rod 330, the boss 320 is connected to one end of the insertion section 310, and the mounting rod 330 is connected to the end of the boss 320 away from the insertion section 310, and the mounting rod 330 is slidably arranged on the mounting bracket 230 along the axial direction of the threaded mounting shaft 210, and a hole is provided on the mounting bracket 230 for the mounting rod 330 to pass through, and the elastic part 400 is configured as a spring, and the spring is sleeved on the mounting rod 330, and the two ends of the spring respectively abut the mounting bracket 230 and the boss 320, thereby applying an elastic force to the positioning part 300 along the axial direction of the threaded mounting shaft 210 toward the positioning hole 112, and the structure is simple and stable and reliable.

[0044] In some specific embodiments, the mounting bracket 230 is detachably mounted on the reverse cutter disc 200 to facilitate the assembly and disassembly of the positioning portion 300, wherein an extension column 250 is provided at one end of the reverse cutter disc 200 away from the threaded mounting shaft 210, a rectangular block 251 is provided at one end of the extension column 250 away from the reverse cutter disc 200, a screw 252 is provided at one end of the rectangular block 251 away from the extension column 250, the mounting bracket 230 is provided with a rectangular sleeve hole 231 and is sleeved on the rectangular block 251 through the rectangular sleeve hole 231, and the rotation of the mounting bracket 230 is limited by the cooperation between the rectangular block 251 and the rectangular sleeve hole 231; a gasket 253 and a locking nut 254 are provided on the screw 252, and the mounting bracket 230 is locked and fixed to the extension column 250 through the locking nut 254.

[0045] Reference Figure 1 and Figure 3 As shown, in some embodiments of the present invention, a plurality of positioning holes 112 are provided, and the plurality of positioning holes 112 are evenly distributed on the same circumference around the threaded mounting hole 111. The positioning holes 112 and the positioning portions 300 are arranged in a one-to-one correspondence. By providing a plurality of positioning holes 112 and the positioning portions 300, the stability of the rotation limit of the reverse cutter disc 200 is ensured.

[0046] Reference Figures 1 to 4 As shown, in some embodiments of the present invention, the positioning assembly also includes a linkage part, which is connected between multiple positioning parts 300. The linkage part is used to drive the multiple positioning parts 300 to move synchronously along the axial direction of the threaded mounting shaft 210 away from the positioning hole 112. By setting the linkage part, when disassembling the reverse cutter disc 200, it is only necessary to move the linkage part axially away from the positioning hole 112 of the threaded mounting shaft 210, so as to drive the multiple positioning parts 300 to move synchronously along the axial direction of the threaded mounting shaft 210 away from the positioning hole 112. Compared with separately controlling the axial movement of multiple positioning parts 300 along the axial direction of the threaded mounting shaft 210 away from the positioning hole 112, it can facilitate the operation of the operator, simplify the operation and save the operation time.

[0047] Reference Figures 1 to 4As shown, in some embodiments of the present invention, a stopper 240 is movably provided on the reverse cutter head 200, and the stopper 240 has at least a first state and a second state during its movement. When the stopper 240 is in the first state, the stopper 240 avoids the axial movement path of the linkage portion along the threaded mounting shaft 210. When the positioning portion 300 is disengaged from the positioning hole 112 and the stopper 240 is in the second state, the stopper 240 blocks the movement path of the linkage portion along the axial direction of the threaded mounting shaft 210 toward the positioning hole 112, so that the positioning portion 300 remains separated from the positioning hole 112. By providing the stopper 240, Therefore, when disassembling the reverse cutter disc 200, the positioning part 300 can be disengaged from the positioning hole 112 first, and then the stop part 240 can be adjusted to the second state, so that the stop part 240 blocks the movement path of the linkage part along the axial direction of the threaded mounting shaft 210 toward the positioning hole 112, thereby keeping the positioning part 300 separated from the positioning hole 112. At this time, the operator does not need to apply force to the linkage part all the time to keep the positioning part 300 separated from the positioning hole 112. The operator can free his hands to rotate the reverse cutter disc 200 to disengage the threaded mounting shaft 210 from the threaded mounting hole 111 on the connecting cylinder 110, making the operation more convenient.

[0048] Reference Figure 2 and Figure 3 As shown, in some embodiments of the present invention, the linkage part and the multiple positioning parts 300 are detachably connected. Compared with setting the linkage part and the multiple positioning parts 300 as an integrated structure, when part of the positioning part 300 is damaged, only the damaged positioning part 300 needs to be replaced, saving maintenance costs.

[0049] Reference Figure 2 and Figure 3 As shown, in some embodiments of the present invention, the linkage part includes a linkage plate 500, and multiple positioning parts 300 are all slidably arranged on the linkage plate 500 along the axial direction of the threaded mounting shaft 210. The linkage plate 500 is provided with a hole for the positioning part 300 to pass through, and the positioning part 300 is detachably connected to a limiting piece on the side of the linkage plate 500 away from the positioning hole 112. The limiting piece is used to abut against one end of the linkage plate 500 away from the positioning hole 112, so that when the linkage plate 500 is pulled away from the positioning hole 112 along the axial direction of the threaded mounting shaft 210, the linkage plate 500 can be abutted against the limiting piece to drive the positioning part 300 to move away from the positioning hole 112; when the linkage plate 500 needs to be disassembled, it is only necessary to remove the limiting piece, and then the linkage plate 500 can be removed from the positioning part 300, which is very convenient to operate. The limiting member includes a limiting nut 340 , and the positioning portion 300 is provided with an external thread for installing the limiting nut 340 . The structure is simple and easy to assemble and disassemble.

[0050] When the cam 240 is in the closed position, the stopper 240 is in the closed position, and the stopper 240 is in the closed position, so that the cam 240 is in the closed position.

[0051] The present invention further provides a raise boring machine including the aforementioned hole reaming stabilization device. Since the raise boring machine includes the aforementioned hole reaming stabilization device, it has all the beneficial effects brought about by the aforementioned hole reaming stabilization device, and therefore will not be described in detail here.

[0052] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0053] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A hole expansion stabilization device, characterized in that: include: A drill rod, wherein one axial end of the drill rod is provided with a connecting tube, and an end surface of the connecting tube away from the drill rod is provided with a threaded mounting hole and a positioning hole, wherein both the threaded mounting hole and the positioning hole extend along the axial direction of the drill rod, and the positioning hole is located on a circumferential side of the threaded mounting hole; A reverse cutter disc, wherein the reverse cutter disc is provided with a threaded mounting shaft, and a plurality of reaming tools are evenly arranged on the circumference of the threaded mounting shaft, and the threaded mounting shaft is threadedly assembled in the threaded mounting hole; The positioning assembly includes a positioning portion and an elastic portion. The positioning portion is arranged on the reverse cutter disc along the axial sliding of the threaded mounting shaft. The elastic portion is arranged between the reverse cutter disc and the positioning portion. The elastic portion is used to apply elastic force to the positioning portion to keep the positioning portion partially inserted into the positioning hole under normal conditions, thereby limiting the rotation of the threaded mounting shaft relative to the connecting cylinder.

2. The hole expansion stabilization device according to claim 1, characterized in that: The positioning portion includes an insertion section and an installation section. The insertion section is passed through the reverse cutter disc and is used to be inserted into the positioning hole. The installation section is connected to one end of the insertion section and is located on the side of the reverse cutter disc away from the threaded installation shaft. The elastic portion is located on the side of the reverse cutter disc away from the threaded installation shaft and is used to apply an elastic force to the installation section along the axial direction of the threaded installation shaft toward the insertion section.

3. The hole expansion stabilization device according to claim 2, characterized in that: The end of the reverse cutter disc facing away from the threaded mounting shaft is provided with a mounting bracket, the mounting section includes a boss and a mounting rod, the boss is connected to one end of the insertion section, the mounting rod is connected to the end of the boss facing away from the insertion section, the mounting rod is slidably arranged on the mounting bracket, the elastic part is configured as a spring, the spring is sleeved on the mounting rod, and both ends respectively abut the mounting bracket and the boss.

4. The hole expansion stabilization device according to claim 1, characterized in that: There are multiple positioning holes, and the multiple positioning holes are evenly distributed on the same circumference around the threaded mounting hole. The positioning holes are arranged in a one-to-one correspondence with the positioning parts.

5. The hole expansion stabilization device according to claim 4, characterized in that: The positioning assembly further includes a linkage portion connected between the plurality of positioning portions, and the linkage portion is used to drive the plurality of positioning portions to move synchronously along the axial direction of the threaded mounting shaft away from the positioning hole.

6. The hole expansion stabilization device according to claim 5, characterized in that: A stop portion is movably provided on the reverse cutter disc, and the stop portion has at least a first state and a second state during its movement. When the stop portion is in the first state, the stop portion avoids the axial movement path of the linkage portion along the threaded mounting shaft. When the positioning portion is disengaged from the positioning hole and the stop portion is in the second state, the stop portion blocks the movement path of the linkage portion along the axial direction of the threaded mounting shaft toward the positioning hole, so that the positioning portion remains separated from the positioning hole.

7. The hole expansion stabilization device according to claim 5, characterized in that: The linkage portion is detachably connected to the plurality of positioning portions.

8. The hole expansion stabilization device according to claim 7, characterized in that: The linkage part includes a linkage plate, and the multiple positioning parts are all slidably arranged on the linkage plate along the axial direction of the threaded mounting shaft. The positioning part is detachably connected to a limiting member on the side of the linkage plate away from the positioning hole, and the limiting member is used to abut the end of the linkage plate away from the positioning hole.

9. The hole expansion stabilization device according to claim 8, characterized in that: The limiting member includes a limiting nut, and the positioning portion is provided with an external thread for installing the limiting nut.

10. A raise boring machine, characterized in that: Including the hole expansion stabilization device according to any one of claims 1 to 9.

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