Long-distance self-tunneling hard rock tube push bench

Abstract

The invention discloses a long-distance self-tunneling hard rock pipe jacking machine, which belongs to the technical field of hard rock construction devices, and comprises a cutter head, a mounting groove is formed in the front side of the cutter head in a penetrating manner, a cutter is movably inserted in the mounting groove, two end parts of the cutter are connected with middle shafts, and a mounting plate is mounted in the mounting groove; inserting grooves used for containing the middle shaft are formed in the sides, facing the cutters, of the two mounting plates, grooves are formed in the inner walls, away from the mounting plates, of the cutter heads, and positioning mechanisms are arranged in the grooves; the positioning mechanism comprises a first pin shaft and a movable rod, the free end, away from the first pin shaft, of the movable rod is rotatably provided with a rotating shaft in a penetrating mode, the movable rod is connected with a positioning block, a through hole is formed in the middle of the positioning block in a penetrating mode, and a cylindrical rod is arranged in the through hole in a penetrating and sliding mode; one end of the cylindrical rod is in threaded fit with the screw hole. The tool replacement device has the effects that the tool can be conveniently replaced, and the working efficiency during tool replacement is improved.

Description

Technical Field

[0001] The present invention relates to the field of hard rock construction devices, and particularly to a long-distance self-boring hard rock pipe jacking machine. Background Art

[0002] A hard rock pipe jacking machine is a device specifically used for tunneling in rock formations. Its main function is to drill holes in deep rock projects such as subways, tunnels, and mines, and at the same time install steel pipes in the holes and inject slurry to achieve the consolidation and support of the rock formation. A cutter head is usually installed at the frontmost side of the hard rock pipe jacking machine. The cutter head is usually cylindrical, and cutters are installed on the surface of the cutter head. The cutters are divided into two types: central butterfly hob and peripheral butterfly hob. The central butterfly hobs are evenly distributed on its surface along the central axis of the cutter head, while the peripheral butterfly hobs are located outside the central butterfly hobs. The two are used in combination to achieve the full-section cutting function.

[0003] During the cutting process, the cutters are extremely prone to wear due to friction with hard rock. After tunneling for a certain distance, the cutters need to be replaced. For ultra-large hard rock pipe jacking machines, robots are mostly used for automatic cutter replacement. For relatively small hard rock pipe jacking machines, due to limited internal space, manual replacement is usually adopted. For manual replacement, first, the screws need to be removed, the positioning blocks taken out, then the cutters are pulled out from the cutter head and new cutters are put in. The cutters are generally positioned by the extrusion of the positioning blocks. The positioning blocks are connected to the cutter head with a screw. The process of removing the screw requires the use of a wrench. The removed positioning blocks and screws need to be carefully placed to prevent loss. After replacing the cutters, they need to be installed back in sequence, which affects the speed of cutter replacement. Summary of the Invention

[0004] In order to facilitate the replacement of the cutters and improve the working efficiency during cutter replacement, the present application provides a long-distance self-boring hard rock pipe jacking machine.

[0005] The long-distance self-boring hard rock pipe jacking machine provided by the present application adopts the following technical solutions: A long-distance self-excavating hard rock pipe jacking machine comprises a cutter disc, a mounting groove is formed through the front side of the cutter disc, a tool is movably inserted in the mounting groove, two ends of the tool are connected to a central axis, two mounting plates corresponding to the tool are installed in the mounting groove, the tool is located between the two mounting plates, and a slot for accommodating the central axis is formed on the side of the two mounting plates facing the tool, a groove is formed on the inner wall of the cutter disc away from the mounting plate, and a positioning mechanism is provided in the groove; the positioning mechanism comprises a first pin shaft and a movable rod, the first pin shaft is rotated on the groove wall, the movable rod is rotatably installed on the first pin shaft, the free end of the movable rod away from the first pin shaft passes through and is rotatably provided with a rotating shaft, the movable rod is connected to a positioning block, a through hole is formed through the middle part of the positioning block, a columnar rod is formed through and slidably provided inside the through hole, a screw hole is formed on the side wall of the mounting plate close to the slot, and one end of the columnar rod is threadedly matched with the screw hole.

[0006] By adopting the above technical scheme, when the tool needs to be replaced, the new tool is placed in the installation groove and the central axis is inserted into the slot. By moving the movable rod to rotate around the first pin shaft, the movable rod drives the positioning block to rotate around the axis of the first pin shaft and insert it into the slot. The two sides of the positioning block are respectively in contact with the inner wall of the slot and the central axis to position the central axis. At this time, the rotating shaft is rotated, and the rotating shaft drives the cylindrical rod to rotate. When the threaded end of the cylindrical rod is inserted into the screw hole and rotated to tighten, the positioning block is stably installed in the slot. The method of rotating and plugging the positioning block driven by the movable rod replaces the traditional direct insertion method. After the positioning block and the cylindrical rod are disassembled, there is no need to place it carefully to prevent loss, and there is no need to repeatedly adjust the position of the positioning block during installation, which is conducive to speeding up the speed of positioning the central axis by the positioning block, and ultimately facilitates the replacement of the tool and improves the work efficiency during tool replacement.

[0007] Optionally, one end of the cylindrical rod is fixedly connected to a rectangular rod, the rotating shaft is penetrated by a rectangular hole along its own axis, the rectangular rod is inserted into and slidably fits in the rectangular hole, and the end of the rotating shaft away from the positioning block is fixedly connected to a rotating handle.

[0008] By adopting the above technical solution, the setting of the handle makes it easier for the operator to apply force to rotate the shaft. At the same time, the cooperation between the rectangular hole and the rectangular rod further ensures the stability of the cylindrical rod when the shaft drives the cylindrical rod to rotate, and facilitates a faster and more stable connection between the cylindrical rod and the screw hole.

[0009] Optionally, a slide groove connected to the through hole is formed on the side wall of the positioning block, a slider is provided in the slide groove, a guide groove is formed on the slider in a direction perpendicular to the axis of the through hole, a protrusion is fixedly connected to the inner wall of the slide groove, and the protrusion slides and fits in the guide groove.

[0010] By adopting the above technical solution, the cooperation between the bump and the guiding groove plays a role in limiting the sliding of the slider, which is beneficial to ensuring the stability of the slider during sliding; when the cylindrical rod disengages from the screw hole and the positioning block rotates out of the slot around the first pin shaft, the inner wall of the slot presses the slider on one side of the positioning block, pushing the slider to contract in the sliding groove; when installing the positioning block, the cylindrical rod is inserted into the through hole, and the side wall of the cylindrical rod presses the slider, thereby pushing the slider to protrude from the sliding groove and press the inner wall of the slot, which is beneficial to making up for the problem of space limitation in the rotational insertion of the positioning block and is beneficial to fully ensuring the stability of the position where the tool is fixed.

[0011] Optionally, the rotating shaft is rotatably connected to the movable rod through a bearing, the middle shaft has a pressing surface, and when the cylindrical rod is in threaded fit with the screw hole, one side of the positioning block abuts against the slot wall of the slot and the other side abuts against the pressing surface.

[0012] By adopting the above technical solution, the setting of the bearing facilitates the smoother rotation of the rotating shaft, and the setting of the pressing surface is beneficial to increasing the contact area between the middle shaft and the positioning block when the middle shaft is fixed, thereby being beneficial to further ensuring the stability of the position where the middle shaft is located.

[0013] Optionally, the cutter head is further provided with a transfer mechanism, the transfer mechanism includes a movable plate rotatably installed on the first pin shaft, a movable groove is formed at the top of the movable plate, a plug board is slidably connected to the movable groove, first and second support rods are connected to the side wall of the plug board, a limiting rod is rotatably installed on the first support rod, a hook is arranged at one end of the limiting rod away from the first support rod, and a clamping column corresponding to the hook and in clamping fit therewith is arranged at one end of the second support rod away from the plug board.

[0014] By adopting the above technical solution, when the movable plate is rotated and turned into the installation groove, the first support rod and the second support rod are at the bottom of the tool, so that the first support rod and the second support rod support the tool. When the tool is released from fixation and the movable plate is reset, the first support rod and the second support rod drive the tool to be taken out of the installation groove. During the movement, the limiting rod closes the area between the first support rod and the second support rod through the cooperation of the hook and the clamping column, which is beneficial to realizing the stable placement of the tool between the first support rod and the second support rod. By borrowing the first support rod and the second support rod to take and place the tool from the installation groove instead of manual handling, it is more labor-saving during the tool replacement process.

[0015] Optionally, a card slot communicating with the movable groove is formed at the top of the movable plate, a card block is fixedly connected to the plug board, and the card block is slidably fitted in the card slot.

[0016] By adopting the above technical solution, the cooperation between the card block and the card slot plays a further role in limiting the position of the movable plate, which is beneficial to further ensuring the stability of the position where the movable plate is located.

[0017] Optionally, a clamping hole is provided on the top of the second support rod, the clamping column is slidably fitted in the clamping hole, a reset spring is provided in the clamping hole, and one end of the clamping column passes through the clamping hole under the elastic force of the reset spring.

[0018] By adopting the above technical solution, the clamping column is pressed so that it can be accommodated in the clamping hole, so that when the clamping hook is engaged with the clamping column, the limit rod is not easy to interfere with the tool, which facilitates faster installation and transportation of the tool.

[0019] Optionally, a pull rod is fixedly connected to the bottom of the clamping column, the pull rod is passed through the second support rod and slidably cooperates with the second support rod, and one end of the pull rod passed through the second support rod is fixedly connected to a gripping portion.

[0020] By adopting the above technical solution, the setting of the pull rod and the holding portion makes it easy for the operator to apply force from different positions to achieve the sliding of the card column in the card hole. At the same time, the holding portion also plays a limiting role on the position of the card column, making it difficult for the card column to completely disengage from the card hole, which is beneficial to ensuring the stability of the position of the card column in the card hole.

[0021] Optionally, a lifting ring is fixedly installed on the top of the plug board, and the first support rod, the second support rod and the limit rod are distributed in two groups along the height direction of the plug board.

[0022] By adopting the above technical solution, the setting of the lifting ring facilitates the quick and stable connection between the plug plate and the crane sling. At the same time, the setting of the two groups of first support rods, second support rods and limit rods facilitates the stable support and transportation of tools of different numbers or shapes, and has strong applicability.

[0023] Optionally, rubber pads are provided on the tops of the first support rod and the second support rod.

[0024] By adopting the above technical solution, the setting of the rubber pad, on the one hand, plays a protective role for the first support rod and the second support rod, which is beneficial to further ensure the service life of the first support rod and the second support rod; on the other hand, it increases the friction between the first support rod and the second support rod and the tool, which is beneficial to further ensure the stability of the position of the tool when it is supported by the first support rod and the second support rod.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: By setting a positioning mechanism, when replacing the tool, a new tool is placed in the installation slot, and the central axis is inserted into the slot. By toggling the movable rod to rotate around the first pin shaft, the movable rod drives the positioning block to rotate around the axis of the first pin shaft and insert it into the slot. The two sides of the positioning block are respectively in contact with the inner wall of the slot and the central axis to position the central axis. By rotating the turning handle, the turning handle drives the rotating shaft to rotate, and the rotating shaft drives the cylindrical rod to rotate, so that the threaded end of the cylindrical rod is inserted into the screw hole and rotated and tightened, and the positioning block is installed in the slot. The method of rotating and plugging the positioning block driven by the movable rod replaces the traditional direct insertion method. After the positioning block and the cylindrical rod are disassembled, there is no need to place them carefully to prevent loss, and there is no need to adjust the position of the positioning block during installation, which speeds up the speed of positioning the central axis by the positioning block.

[0026] By setting up a transfer mechanism, the movable plate is moved to rotate around the first pin shaft and inserted into the installation slot, so that the first support rod and the second support rod are at the bottom of the tool to support the tool. After the movable plate is reset, the movable plate drives the first support rod and the second support rod to move via the plug plate, and the first support rod and the second support rod drive the tool to be taken out of the installation slot. During the movement, the limit rod is connected to the clamping column via the hook to close the area between the first support rod and the second support rod, so as to keep the tool stably placed on the first support rod and the second support rod. The first support rod and the second support rod are used to take and place the tool from the installation slot instead of manual handling and placement, so that the tool replacement process is more labor-saving.

[0027] By connecting the lifting ring with the lifting device of the crane and pulling it upward, the lifting ring drives the plug plate to move upward relative to the movable plate, and the plug plate moves up in the movable groove. At the same time, the clamping block slides up in the clamping groove to make the plug plate detach from the top of the movable plate. The plug plate drives the tool to be lifted via the first support rod and the second support rod. After the tool is removed from the plug plate, a new tool is replaced and the lifting is reset for replacement, which is convenient for lifting and transferring the disassembled and new tools, and is simpler than manual handling.

[0028] 4. By setting the slide groove and the slider, when the positioning block rotates and moves out of the slot around the first pin shaft, the inner wall of the slot squeezes the slider on one side of the positioning block, pushing the slider to shrink in the slide groove. When installing the positioning block, the cylindrical rod is inserted into the through hole, and the side wall of the cylindrical rod squeezes the slider. The cylindrical rod is connected to the screw hole to push the slider out of the slide groove to squeeze the inner wall of the slot, thereby compensating for the problem of limited space for the positioning block to be rotated and inserted. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0030] Figure 2 This is a schematic diagram of the front structure of the cutter disc of an embodiment of the present application.

[0031] Figure 3 Schematic diagram of the tool connection structure according to an embodiment of the present application.

[0032] Figure 4 Top view structure diagram of the tool and the mounting plate according to an embodiment of the present application.

[0033] Figure 5 Schematic diagram of the positioning mechanism structure according to an embodiment of the present application.

[0034] Figure 6 Schematic diagram of the disassembled state structure of the positioning mechanism according to an embodiment of the present application.

[0035] Figure 7 Axonometric view of the tool mounting according to an embodiment of the present application.

[0036] Figure 8 is Figure 7 Partial enlarged schematic view of part A in

[0037] Figure 9 Axonometric view of the connection between the positioning mechanism and the transfer mechanism according to an embodiment of the present application.

[0038] Figure 10 Schematic diagram of the state where the transfer mechanism transfers the tool according to an embodiment of the present application.

[0039] Explanation of reference numerals: 1. Cutter head; 2. Front shield; 3. Middle shield; 4. Tail shield; 5. Installation groove; 6. Mounting plate; 7. Slot; 8. Central axis; 81. Pressing surface; 9. Tool; 10. Screw hole; 11. Groove; 12. First pin shaft; 13. Positioning mechanism; 131. Movable rod; 132. Rotating shaft; 133. Bearing; 134. Rotating handle; 135. Rectangular hole; 136. Positioning block; 137. Through hole; 138. Cylindrical rod; 139. Rectangular rod; 1310. Threaded section; 1311. Slide groove; 1312. Slide block; 1313. Guide groove; 14. Transfer mechanism; 141. Movable plate; 142. Movable groove; 143. Insertion plate; 144. Card slot; 145. Card block; 146. Lifting ring; 147. First support rod; 148. Second support rod; 1481. Card hole; 1482. Return spring; 149. Second pin shaft; 1410. Limiting rod; 1411. Hook; 1412. Card column; 1413. Pull rod; 1414. Holding part; 1415. Rubber pad. Detailed description of the specific implementation

[0040] The following is a further detailed description of the present application in conjunction with the attached Figures 1-9 drawings.

[0041] An embodiment of the present application discloses a long-distance self-boring hard rock pipe jacking machine. Refer to Figure 1 and Figure 2, The long-distance self-boring hard rock pipe jacking machine includes a cutter head 1, a front shield 2 installed on the rear side of the cutter head 1, a middle shield 3 installed on the rear side of the front shield 2, and a tail shield 4 installed on the rear side of the middle shield 3. Among them, an installation groove 5 is formed through the side of the cutter head 1 away from the front shield 2, and a cutter 9 is movably inserted into the installation groove 5. There is a gap between the cutter 9 and the installation groove 5 for the movement of crushed stones.

[0042] Refer to Figure 2 and Figure 3 , Specifically, in the embodiment of the present application, four groups of cutters 9 are provided, and each group of cutters 9 is circumferentially and evenly distributed around the axis of the cutter head 1. The number of each group of cutters 9 is distributed in multiple along the radial direction of the cutter 9. The upper and lower surfaces of each cutter 9 are fixedly connected with a central shaft 8. Multiple groups of mounting plates 6 corresponding to the cutters 9 one by one are installed in the installation groove 5. Each group of mounting plates 6 is provided with two corresponding to the two central shafts 8 of each cutter 9, and the cutter 9 is located between the two mounting plates 6.

[0043] Refer to Figure 3 and Figure 4 , Slots 7 are formed on the sides of the two mounting plates 6 facing the cutter 9, and screw holes 10 are formed on the inner walls of the mounting plates 6 close to the slots 7, that is, on the inner walls of the mounting plates 6 on one side of the slots 7. Grooves 11 are formed on the inner walls of the cutter head 1 away from the mounting plates 6, that is, on the inner walls of the cutter head 1 behind the mounting plates 6. The grooves 11 are used to accommodate the movable plates 141. A positioning mechanism 13 and a transfer mechanism 14 are arranged in the grooves 11. Multiple positioning mechanisms 13 and transfer mechanisms 14 are provided corresponding to several cutters 9. Among them, the positioning mechanism 13 includes a first pin shaft 12 and a movable rod 131. Among them, the first pin shaft 12 is fixedly installed on the groove wall of the groove 11, and the movable rod 131 is rotatably installed on the first pin shaft 12.

[0044] Refer to Figure 4 and Figure 5 , One end of the movable rod 131 is connected with a positioning block 136. In the embodiment of the present application, the number of the movable rod 131 and the positioning block 136 is two, and they respectively correspond to the two mounting plates 6 on the upper and lower sides of the cutter 9. A rotating shaft 132 is penetrated and rotatably arranged at the free end of the movable rod 131 away from the first pin shaft 12. A bearing 133 is installed between the rotating shaft 132 and the movable rod 131. The rotating shaft 132 extends from one end of the movable rod 131 and is vertically and fixedly connected with a rotating handle 134 to facilitate the rotation of the rotating shaft 132 by applying force through the rotating handle 134.

[0045] Refer to Figure 5 , A rectangular hole 135 is formed through the middle of the rotating shaft 132 along its own axis. The positioning block 136 is located on the side of the movable rod 131 away from the rotating handle 134. A through hole 137 is formed through the middle of the positioning block 136 along its own axis. A cylindrical rod 138 is penetrated inside the through hole 137. The outer diameter dimension of the cylindrical rod 138 is adapted to the inner diameter dimension of the through hole 137 to facilitate the sliding of the cylindrical rod 138 in the through hole 137.

[0046] Referring to Figure 5 and Figure 6 Specifically, one end of the cylindrical rod 138 is integrally connected with a rectangular rod 139. The rectangular rod 139 is in sliding fit with the rectangular hole 135. One end of the cylindrical rod 138 far from the rectangular rod 139 is integrally and fixedly connected with a threaded section 1310. The threaded section 1310 is in threaded fit with the threaded hole 10. A sliding groove 1311 communicating with the through hole 137 is formed in the side wall of the positioning block 136. A sliding block 1312 is in sliding fit in the sliding groove 1311. To ensure the sliding stability of the sliding block 1312, guide grooves 1313 are formed in the side walls of the top and bottom of the sliding block 1312 along the direction perpendicular to the axis of the through hole 137. A convex block (not shown in the figure) is fixedly connected to the inner wall of the sliding groove 1311. The convex block is in sliding fit in the guide groove 1313 to play a role in limiting and guiding the sliding of the sliding block 1312.

[0047] Referring to Figure 4 and Figure 5 When installing the positioning block 136, the cylindrical rod 138 is inserted into the through hole 137. The side wall of the cylindrical rod 138 presses the sliding block 1312, thereby pushing the sliding block 1312 to extend out of the sliding groove 1311 and press the inner wall of the slot 7, so as to facilitate ensuring the stability of the position of the positioning block 136 after installation. And during the process that the cylindrical rod 138 is not inserted into the through hole 137 and the positioning block 136 rotates around the first pin shaft 12 and is inserted into the slot 7, the sliding block 1312 on one side of the positioning block 136 is pressed by the inner wall of the slot 7 and retracted into the sliding groove 1311. At this time, the guide groove 1313 in the sliding block 1312 slides relative to the convex block, which is beneficial to making up for the problem that the rotation and insertion of the positioning block 136 are restricted by space.

[0048] Continuing to refer to Figure 4 and Figure 5 Furthermore, the rotating shaft 132 is rotatably connected with the movable rod 131 through a bearing 133. One end of the rotating shaft 132 is inserted into the positioning block 136. The rectangular rod 139 is movably inserted into the rotating shaft 132 through the rectangular hole 135. When the threaded section 1310 of the cylindrical rod 138 is completely inserted into the threaded hole 10, the rectangular rod 139 just completely retracts into the rectangular hole 135. Push the rectangular rod 139 forward and rotate the turning handle 134. The turning handle 134 drives the rectangular rod 139 to rotate through the rotating shaft 132. The rectangular rod 139 drives the cylindrical rod 138 to rotate. At this time, the cylindrical rod 138 is both driven by the driving force of rotation and the forward thrust, so that the end of the cylindrical rod 138 with the threaded section 1310 is inserted into the threaded hole 10 and rotated and fastened (combined with Figure 6 ).

[0049] Referring to Figure 4 and Figure 7, Further, the outer peripheral surface of the central shaft 8 has a pressing surface 81. After the positioning block 136 is inserted into the slot 7, one side thereof contacts the pressing surface 81 of the central shaft 8, and the other side contacts the inner wall of the slot 7 through the slider 1312, which is conducive to realizing the stable positioning of the central shaft 8. The movable rod 131 is rotationally connected to the cutter head 1 through the first pin shaft 12. The way of driving the positioning block 136 to rotate and insert is adopted instead of the traditional direct insertion method. After the positioning block 136 and the cylindrical rod 138 are disassembled, there is no need to place them carefully to prevent loss, and there is no need to adjust the position of the positioning block 136 too much during installation, which is conducive to ensuring the speed of the positioning block 136 positioning the central shaft 8, and the installation efficiency is high.

[0050] Refer to Figure 8 and Figure 9 , The transfer mechanism 14 includes a movable plate 141. The movable plate 141 is rotatably installed on the first pin shaft 12. A rectangular movable slot 142 is formed at the top of the movable plate 141. An insertion plate 143 is arranged in the movable slot 142. The width dimension of the insertion plate 143 is adapted to the width dimension of the inner wall of the movable slot 142, so as to facilitate the sliding of the insertion plate 143 in the movable slot 142. Two card slots 144 communicating with the movable slot 142 are further formed at the top of the movable plate 141. The two card slots 144 are respectively located on both sides of the length direction of the movable slot 142. Card blocks 145 are fixedly connected to both sides of the insertion plate 143. The two card blocks 145 are respectively slidably matched in the two card slots 144 to further ensure the stability of the insertion plate 143 during sliding.

[0051] Refer to Figure 7 and Figure 8 , The longitudinal section of the insertion plate 143 is in the shape of a '7'. A lifting ring 146 is connected to the top of the insertion plate 143 for connecting the lifting tool of an external crane to facilitate the subsequent lifting and transfer of the insertion plate 143. Horizontally arranged first support rod 147 and second support rod 148 are vertically connected to the side wall of the insertion plate 143. The first support rod 147 and the second support rod 148 are used to support the bottom of the cutter 9. The hob used on the cutter head 1 of the hard rock pipe jacking machine is disc-shaped, and the cutting contact surface is in the shape of a butterfly. The number of butterflies can be one or two. Therefore, the number of the first support rod 147 and the second support rod 148 is two but not limited to two, and it is selected according to the shape of the actually used cutter 9. In the embodiment of the present application, the number of both the first support rod 147 and the second support rod 148 is selected as two.

[0052] Refer to Figure 7 and Figure 9The top of the free end of the first support rod 147 away from the plug plate 143 is fixedly connected with a second pin shaft 149, and the second pin shaft 149 is rotatably installed with a limiting rod 1410. The limiting rod 1410 is integrally connected with a hook 1411 at one end away from the first support rod 147, and a clamping column 1412 corresponding to and engaged with the hook 1411 is provided at the top of the free end of the second support rod 148 away from the plug plate 143. When the hook 1411 of the limiting rod 1410 is connected with the clamping column 1412, the side wall of one side of the limiting rod 1410 contacts the side wall of the central axis 8 of the tool 9, so as to limit the tool disc 1 from falling off the first support rod 147 and the second support rod 148.

[0053] Reference Figure 8 and Figure 9 Furthermore, a clamping hole 1481 is provided at the top of the free end of the second support rod 148 away from the plug plate 143, and the clamping column 1412 is slidably fitted in the clamping hole 1481. A reset spring 1482 is provided in the clamping hole 1481, and one end of the reset spring 1482 is connected to the bottom wall of the clamping hole 1481, and the other end is connected to the clamping column 1412. One end of the clamping column 1412 passes out of the clamping hole 1481 under the elastic force of the reset spring 1482. When the clamping column 1412 slides to the position received in the clamping hole 1481, the limiting rod 1410 is not easy to interfere with the tool 9 during the connection process with the clamping column 1412, so as to facilitate the installation and transportation of the tool 9 more quickly. And through the above-mentioned setting, it is convenient to set the limiting rod 1410 to be rigid so as to fully ensure the stability of the limiting rod 1410 limiting the tool 9.

[0054] Continue to refer to Figure 8 and Figure 9 The bottom of the clamping column 1412 is fixedly connected with a pull rod 1413, which is inserted into the second support rod 148 and slidably cooperates with the second support rod 148. One end of the pull rod 1413 inserted into the second support rod 148 is fixedly connected with a gripping portion 1414, so as to facilitate the application of force to realize the sliding of the clamping column 1412 in the clamping hole 1481. At the same time, the gripping portion 1414 also plays a role in limiting the position of the clamping column 1412, so that the clamping column 1412 is not easy to completely separate from the clamping hole 1481, which is conducive to ensuring the stability of the position of the clamping column 1412 in the clamping hole 1481. Rubber pads 1415 are bonded to the tops of the first support rod 147 and the second support rod 148 to protect the first support rod 147 and the second support rod 148, and further ensure the stability of the position of the tool 9 when supported by the first support rod 147 and the second support rod 148.

[0055] Reference Figure 9 and Figure 10The movable plate 141 can be accommodated in the groove 11 when rotating around the first pin shaft 12, so as to realize the folding and storage of the movable plate 141. By connecting the lifting ring 146 with the lifting device of the crane and pulling it upward, the lifting ring 146 drives the plug plate 143 to move upward relative to the movable plate 141, and the plug plate 143 moves upward in the movable groove 142. The clamping block 145 slides upward in the clamping groove 144, so that the plug plate 143 is separated from the top of the movable plate 141. The plug plate 143 drives the tool 9 to be lifted through the first support rod 147 and the second support rod 148, which is convenient for lifting and transferring the disassembled and new tools 9, which is simpler than manual handling.

[0056] Reference Figure 7 and Figure 9 , the movable plate 141 is rotated around the first pin 12 and inserted into the installation slot 5 until the first support rod 147 and the second support rod 148 are at the bottom of the tool 9 to support the tool 9. After the movable plate 141 is reset, the movable plate 141 drives the first support rod 147 and the second support rod 148 to move through the plug plate 143, and the first support rod 147 and the second support rod 148 drive the tool 9 to be taken out of the installation slot 5, so as to achieve the effect of taking and placing the tool 9 from the installation slot 5 by using the first support rod 147 and the second support rod 148, replacing the manual handling and placing method, making the tool 9 replacement process more labor-saving. During the movement of the movable plate 141, the limit rod 1410 is connected to the clamping column 1412 through the hook 1411, so as to close the area between the first support rod 147 and the second support rod 148, which is conducive to fully ensuring the stability of the tool 9 when it is placed on the first support rod 147 and the second support rod 148.

[0057] The implementation principle of a long-distance self-excavating hard rock pipe jacking machine in an embodiment of the present application is as follows: when the operator replaces the worn tool 9 installed on the cutter head 1 of the hard rock pipe jacking machine, the operator first replaces the longitudinal tool 9, rotates the handles 134 on the upper and lower sides of the tool 9, and the handles 134 drive the rotating shaft 132 to rotate relative to the movable rod 131. The rotating shaft 132 drives the rectangular rod 139 to rotate through the rectangular hole 135, and the rectangular rod 139 drives the columnar rod 138 to rotate, so that one end of the columnar rod 138 with the threaded section 1310 is screwed out of the screw hole 10, and the rectangular rod 139 moves in the rectangular hole 135 until the columnar rod 138 is taken out of the screw hole 10. Then, the movable rod 131 is pushed backward to rotate around the first pin shaft 12 , and the movable rod 131 drives the positioning block 136 to move, and the slider 1312 on one side of the positioning block 136 is squeezed into the slide groove 1311 by the inner wall of the slot 7 until the positioning block 136 and the columnar rod 138 are taken out of the slot 7 together.

[0058] Then, move the movable plate 141 forward. The movable plate 141 drives the insertion plate 143 to move. The insertion plate 143 drives the first support rod 147 and the second support rod 148 to insert into the installation groove 5 until the first support rod 147 and the second support rod 148 are at the bottom of the tool 9 to support the tool 9. Push the limiting rod 1410 from the gaps of the installation grooves 5 on both sides of the tool 9 to rotate around the second pin shaft 149, and make the limiting rod 1410 connected with the clamping column 1412 through the hook 1411, so as to enclose the area between the first support rod 147 and the second support rod 148 and keep the tool 9 stably placed on the first support rod 147 and the second support rod 148. Subsequently, move the movable plate 141 backward around the first pin shaft 12. The movable plate 141 drives the first support rod 147 and the second support rod 148 to move through the insertion plate 143. The first support rod 147 and the second support rod 148 drive the tool 9 to be taken out from the installation groove 5.

[0059] Then, connect the lifting ring 146 with the lifting tool of the crane, start the crane to pull and suspend upward. The lifting ring 146 drives the insertion plate 143 to move upward relative to the movable plate 141. The insertion plate 143 moves upward in the movable groove 142, and the clamping block 145 slides upward in the clamping groove 144, so that the insertion plate 143 disengages from above the movable plate 141. The insertion plate 143 drives the tool 9 to be hoisted through the first support rod 147 and the second support rod 148. Transfer the insertion plate 143 to the feeding position at the rear side of the cutter head 1. Other operators unload the worn tool 9 from the insertion plate 143, then place a new tool 9 on it again, and then hoist the new tool 9 back. The user holds the insertion plate 143 to make it insert into the movable groove 142 again. Subsequently, remove the lifting tool of the crane, and move the movable plate 141 forward around the first pin shaft 12 to insert into the installation groove 5.

[0060] The first support rod 147 and the second support rod 148 drive the new tool 9 to insert into the installation groove 5. The central shafts 8 on the upper and lower sides of the tool 9 insert into the insertion slots 7. Then, push the movable rod 131 forward. The movable rod 131 drives the positioning block 136 to rotate around the axis of the first pin shaft 12 and insert into the insertion slot 7. The sliding block 1312 retracts into the sliding groove 1311. Then, push the rectangular rod 139 forward and rotate the rotating handle 134. The rotating handle 134 drives the rectangular rod 139 to rotate through the rotating shaft 132. The rectangular rod 139 drives the cylindrical rod 138 to rotate, so that one end of the threaded section 1310 of the cylindrical rod 138 inserts into the threaded hole 10 and rotates for fastening. At the same time, the cylindrical rod 138 squeezes the sliding block 1312 in the through hole 137, pushes the sliding block 1312 to extend out of the sliding groove 1311 and squeeze the inner wall of the insertion slot 7, so that both sides of the positioning block 136 contact with the inner wall of the insertion slot 7 and the central shaft 8 respectively to position the central shaft 8.

[0061] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A long-distance self-boring hard rock pipe jacking machine, comprising a cutter head (1), characterized in that: A mounting groove (5) is formed through the front side of the cutter head (1). A cutter (9) is movably inserted into the mounting groove (5). Both ends of the cutter (9) are connected with a central shaft (8). Two mounting plates (6) corresponding to the cutter (9) are installed in the mounting groove (5). The cutter (9) is located between the two mounting plates (6). Slots (7) for accommodating the central shaft (8) are formed on one side of the two mounting plates (6) facing the cutter (9). A groove (11) is formed on the inner wall of the cutter head (1) away from the mounting plate (6). A positioning mechanism (13) is arranged in the groove (11). The positioning mechanism (13) includes a first pin shaft (12) and a movable rod (131). The first pin shaft (12) is installed on the groove wall of the groove (11). The movable rod (131) is rotatably installed on the first pin shaft (12). A rotating shaft (132) is penetrated and rotatably arranged at the free end of the movable rod (131) away from the first pin shaft (12). The movable rod (131) is connected with a positioning block (136). A through hole (137) is formed through the middle of the positioning block (136). A cylindrical rod (138) is penetrated and slidably arranged inside the through hole (137). A threaded hole (10) is formed on the side wall of the mounting plate (6) close to the slot (7). One end of the cylindrical rod (138) is in threaded cooperation with the threaded hole (10).

2. The long-distance self-boring hard rock pipe jacking machine according to claim 1, wherein: One end of the cylindrical rod (138) is fixedly connected with a rectangular rod (139). A rectangular hole (135) is formed through the rotating shaft (132) along its axis. The rectangular rod (139) is inserted and slidably matched with the rectangular hole (135). A rotating handle (134) is fixedly connected to the end of the rotating shaft (132) away from the positioning block (136).

3. The long-distance self-boring hard rock pipe jacking machine according to claim 1, characterized in that: A sliding groove (1311) communicated with the through hole (137) is formed on the side wall of the positioning block (136). A slider (1312) is arranged in the sliding groove (1311). A guiding groove (1313) is formed in the slider (1312) along the direction perpendicular to the axis of the through hole (137). A convex block is fixedly connected to the inner wall of the sliding groove (1311). The convex block is slidably matched in the guiding groove (1313).

4. The long-distance self-boring hard rock pipe jacking machine according to claim 3, characterized in that: The rotating shaft (132) is rotatably connected to the movable rod (131) through a bearing (133). The central shaft (8) has a pressing surface (81). When the cylindrical rod (138) is in threaded cooperation with the threaded hole (10), one side of the positioning block (136) abuts against the slot wall of the slot (7), and the other side abuts against the pressing surface (81).

5. The long-distance self-boring hard rock pipe jacking machine according to claim 1, characterized in that: The cutter head (1) is further provided with a transfer mechanism (14). The transfer mechanism (14) includes a movable plate (141) rotatably mounted on a first pin shaft (12). An activity groove (142) is formed at the top of the movable plate (141). A plug board (143) is slidably connected to the activity groove (142). The side wall of the plug board (143) is connected with a first support rod (147) and a second support rod (148). A limiting rod (1410) is rotatably mounted on the first support rod (147). A hook (1411) is arranged at one end of the limiting rod (1410) away from the first support rod (147). A column (1412) corresponding to the hook (1411) and in snap-fit connection therewith is arranged at one end of the second support rod (148) away from the plug board (143).

6. The long-distance self-boring hard rock pipe jacking machine according to claim 5, wherein: A clamping groove (144) communicating with the activity groove (142) is formed at the top of the movable plate (141). A clamping block (145) is fixedly connected to the plug board (143). The clamping block (145) is slidably fitted in the clamping groove (144).

7. The long-distance self-boring hard rock pipe jacking machine according to claim 6, wherein: A clamping hole (1481) is formed at the top of the second support rod (148). The column (1412) is slidably fitted in the clamping hole (1481). A return spring (1482) is arranged in the clamping hole (1481). One end of the column (1412) penetrates out of the clamping hole (1481) under the elastic force of the return spring (1482).

8. A long-distance self-boring hard rock pipe jacking machine according to claim 7, characterized in that: A pull rod (1413) is fixedly connected to the bottom of the column (1412). The pull rod (1413) penetrates through the second support rod (148) and is slidably fitted with the second support rod (148). A holding part (1414) is fixedly connected to one end of the pull rod (1413) penetrating through the second support rod (148).

9. The long-distance self-boring hard rock pipe jacking machine according to claim 5, characterized in that: A lifting ring (146) is fixedly installed at the top of the plug board (143). At least two groups of the first support rod (147), the second support rod (148) and the limiting rod (1410) are distributed along the height direction of the plug board (143).

10. A long-distance self-boring hard rock pipe jacking machine according to any one of claims 5 to 9, characterized in that: Rubber pads (1415) are arranged at the tops of the first support rod (147) and the second support rod (148).

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