A long-distance self-excavating hard rock pipe jacking machine

Abstract

The present invention discloses a long-distance self-excavating hard rock pipe jacking machine, which belongs to the technical field of hard rock construction equipment. The machine comprises a cutterhead, a mounting slot is provided on the front side of the cutterhead, a cutter is movably inserted in the mounting slot, both ends of the cutter are connected to a central axis, a mounting plate is installed in the mounting slot, and both mounting plates are provided with slots for accommodating the central axis on the side facing the cutter. A groove is provided on the inner wall of the cutterhead away from the mounting plate, and a positioning mechanism is provided in the groove; the positioning mechanism comprises a first pin and a movable rod, a rotating shaft is provided through the free end of the movable rod away from the first pin, the movable rod is connected to a positioning block, a through hole is provided in the middle of the positioning block, a columnar rod is provided through the inside of the through hole and is slidably provided, a screw hole is provided on the side wall of the mounting plate near the slot, and one end of the columnar rod is threadedly engaged with the screw hole. The present invention has the effect of facilitating the replacement of the cutter and improving the work efficiency during the tool replacement.

Description

Technical Field

[0001] The invention relates to the field of hard rock construction devices, in particular to a long-distance self-excavating hard rock pipe jacking machine. Background Art

[0002] A hard rock pipe jacking machine is a device specifically designed for tunneling in rock formations. Its primary function is to drill holes in deep rock projects such as subways, tunnels, and mines, while simultaneously installing steel pipes and injecting slurry into the holes to consolidate and support the rock formation. A cylindrical cutterhead is typically mounted at the front of the machine, with cutting tools mounted on its surface. These tools are categorized as central butterfly cutters and peripheral butterfly cutters. The central butterfly cutters are distributed uniformly along the cutterhead's central axis, while the peripheral butterfly cutters are located on the outer periphery of the central butterfly cutters. These two cutters work together to achieve full-section cutting.

[0003] The cutting tool is easily worn out due to friction with the hard rock during the cutting process. After excavating a certain distance, the cutting tool needs to be replaced. For super-large hard rock pipe jacking machines, robots are often used to automatically replace the cutting tools. For smaller hard rock pipe jacking machines, manual replacement is usually used due to limited internal space. Manual replacement first requires removing the screws, removing the positioning block, and then pulling the cutting tool out of the cutterhead and inserting a new one. The cutting tool is generally squeezed and positioned by the positioning block, and the positioning block is connected to the cutterhead with a screw. The screw removal process requires the use of a wrench. The removed positioning block and screws must be carefully placed to prevent loss. After replacing the cutting tool, they must be installed back in sequence, which affects the speed of cutting tool replacement. Summary of the Invention

[0004] In order to facilitate the replacement of cutting tools and improve the work efficiency during cutting tool replacement, the present application provides a long-distance self-excavating hard rock pipe jacking machine.

[0005] The present application provides a long-distance self-excavating hard rock pipe jacking machine that adopts the following technical solutions:

[0006] A long-distance self-excavating hard rock pipe jacking machine includes 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, and both ends of the tool are connected to the central axis, and two mounting plates corresponding to the tool are installed in the mounting groove, and the tool is located between the two mounting plates, and both mounting plates are provided with a slot for accommodating the central axis on the side facing the tool, and 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 includes a first pin shaft and a movable rod, the first pin shaft is rotated on the groove wall, and the movable rod is rotatably installed on the first pin shaft, and the free end of the movable rod away from the first pin shaft passes through and is rotatably provided with a rotating shaft, and the movable rod is connected to a positioning block, a through hole is formed through the middle of the positioning block, and a cylindrical rod is passed 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 cylindrical rod is threadedly engaged with the screw hole.

[0007] By adopting the above technical solution, when the tool needs to be replaced, the 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. 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 positioning block on the central axis, and ultimately facilitates the replacement of the tool and improves the work efficiency during tool replacement.

[0008] Optionally, one end of the cylindrical rod is fixedly connected to a rectangular rod, the rotating shaft is provided with a rectangular hole along its own axis, the rectangular rod is passed through 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.

[0009] 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.

[0010] Optionally, the side wall of the positioning block is provided with a slide groove connected to the through hole, a slider is provided in the slide groove, the slider is provided with a guide groove 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.

[0011] By adopting the above technical solution, the cooperation between the protrusion and the guide groove plays a limiting role when the slider slides, which is beneficial to ensuring the stability of the slider when 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 squeezes the slider on one side of the positioning block, pushing the slider to retract in the slot; 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, thereby pushing the slider to extend out of the slot and squeeze the inner wall of the slot, which is beneficial to make up for the problem of space limitation for the rotation and insertion of the positioning block, and is beneficial to fully ensure the stability of the position of the tool when it is fixed.

[0012] Optionally, the rotating shaft is rotatably connected to the movable rod through a bearing, and the central shaft has a pressure surface. When the cylindrical rod is threaded into the screw hole, one side of the positioning block contacts the slot wall and the other side contacts the pressure surface.

[0013] By adopting the above technical solution, the setting of the bearing facilitates smoother rotation of the rotating shaft, and the setting of the pressure surface is conducive to increasing the contact area between the central axis and the positioning block when the central axis is fixed, thereby helping to further ensure the stability of the central axis position.

[0014] Optionally, the cutter disc is further provided with a transfer mechanism, which includes a movable plate rotatably mounted on a first pin shaft, a movable groove being provided on the top of the movable plate, a plug plate being slidably connected to the movable groove, a first support rod and a second support rod being connected to the side wall of the plug plate, the first support rod being rotatably mounted with a limit rod, the limit rod being provided with a hook at one end away from the first support rod, and a clamping column corresponding to and snap-fitting with the hook at one end of the second support rod away from the plug plate.

[0015] By adopting the above technical solution, when the movable plate is rotated so that the movable plate is rotated 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 can support the tool. When the tool is released 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 limit rod cooperates with the hook and the clamping column to close the area between the first support rod and the second support rod, which is conducive to the stable placement of the tool on the first support rod and the second support rod. By using the first support rod and the second support rod to take and place the tool from the installation groove instead of manual handling and placement, the tool replacement process is more labor-saving.

[0016] Optionally, a card slot communicating with the movable slot is provided on the top of the movable plate, and a card block is fixedly connected to the plug plate, and the card block is slidably fitted in the card slot.

[0017] By adopting the above technical solution, the cooperation between the clamping block and the clamping slot plays a further role in limiting the position of the movable plate, which is conducive to further ensuring the stability of the position of the movable plate.

[0018] 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.

[0019] By adopting the above technical solution, the clamping column is pressed so that the clamping column can be received in the clamping hole, so that when the hook is engaged with the clamping column, the limit rod is not likely to interfere with the tool, which facilitates faster installation and transportation of the tool.

[0020] 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 is passed through the second support rod and fixedly connected to a gripping portion.

[0021] By adopting the above technical solution, the arrangement of the pull rod and the gripping 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 gripping portion also serves to limit the position of the card column, making it difficult for the card column to completely separate from the card hole, which is conducive to ensuring the stability of the position of the card column in the card hole.

[0022] Optionally, a lifting ring is fixedly installed on the top of the plugboard, and the first support rod, the second support rod and the limit rod are distributed in two groups along the height direction of the plugboard.

[0023] 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 sets 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.

[0024] Optionally, rubber pads are provided on the tops of the first support rod and the second support rod.

[0025] 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.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] By setting a positioning mechanism, when replacing the tool, the 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 respectively contact 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 traditional direct insertion method is replaced by the rotating insertion method driven by the movable rod. 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.

[0028] By setting up a transfer mechanism, the movable plate is rotated around the first pin 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 through the insert 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 through the hook to close the area between the first support rod and the second support rod, keeping the tool stably placed on the first support rod and the second support rod. The tool is taken and placed from the installation slot by using the first support rod and the second support rod to replace the manual handling and placement method, which makes the tool replacement process more labor-saving.

[0029] 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 upward in the movable groove. At the same time, the clamping block slides upward in the clamping groove, so that the plug plate is separated 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 placed on it, 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.

[0030] 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 retract 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 and 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

[0031] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0032] Figure 2 This is a schematic diagram of the front structure of the cutter disc of an embodiment of the present application.

[0033] Figure 3 This is a schematic diagram of the tool connection structure of an embodiment of the present application.

[0034] Figure 4 This is a schematic diagram of the top view of the tool and mounting plate according to an embodiment of the present application.

[0035] Figure 5 This is a schematic diagram of the positioning mechanism structure of an embodiment of the present application.

[0036] Figure 6 This is a schematic diagram of the structure of the positioning mechanism in the disassembled state according to an embodiment of the present application.

[0037] Figure 7 This is an axonometric view of the tool installation according to an embodiment of the present application.

[0038] Figure 8 yes Figure 7 A partial enlarged schematic diagram of part A.

[0039] Figure 9 This is an axonometric diagram of the connection between the positioning mechanism and the transfer mechanism of an embodiment of the present application.

[0040] Figure 10 This is a schematic diagram of the tool transfer state structure of the transfer mechanism in an embodiment of the present application.

[0041] Description of reference numerals:

[0042] 1. Cutter head; 2. Front shield; 3. Middle shield; 4. Tail shield; 5. Mounting slot; 6. Mounting plate; 7. Slot; 8. Central axis; 81. Pressure surface; 9. Cutter; 10. Screw hole; 11. Groove; 12. First pin; 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 segment; 1311. Slideway 1312. Slider; 1313. Guide groove; 14. Transfer mechanism; 141. Movable plate; 142. Movable groove; 143. Insert plate; 144. Slot; 145. Block; 146. Lifting ring; 147. First support rod; 148. Second support rod; 1481. Clamping hole; 1482. Return spring; 149. Second pin; 1410. Limit rod; 1411. Hook; 1412. Clamping column; 1413. Pull rod; 1414. Grip; 1415. Rubber pad. DETAILED DESCRIPTION

[0043] The following is combined with Figure 1-9 This application is described in further detail.

[0044] The embodiment of the present application discloses a long distance self-excavating hard rock pipe jacking machine. Figure 1 and Figure 2The long-distance self-excavating hard rock pipe jacking machine includes a cutterhead 1, a front shield 2 installed on the rear side of the cutterhead 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, a mounting groove 5 is opened through the side of the cutterhead 1 away from the front shield 2, and a tool 9 is movably inserted in the mounting groove 5. There is a gap between the tool 9 and the mounting groove 5 for moving crushed stones.

[0045] Reference Figure 2 and Figure 3 Specifically, in the embodiment of the present application, four groups of cutters 9 are provided. Each group of cutters 9 is evenly distributed circumferentially around the axis of the cutter disc 1, and the number of cutters 9 in each group is distributed in the radial direction of the cutter 9. The upper and lower surfaces of each cutter 9 are fixedly connected to the central axis 8. Multiple groups of mounting plates 6 corresponding to the cutters 9 are installed in the mounting slot 5. Each group of mounting plates 6 is provided with two corresponding central axes 8 of each cutter 9, and the cutter 9 is located between the two mounting plates 6.

[0046] Reference Figure 3 and Figure 4 , both mounting plates 6 are provided with slots 7 on the side facing the cutting tools 9, and screw holes 10 are provided on the side wall of the mounting plate 6 close to the slots 7, i.e., the inner wall of the mounting plate 6 on the side of the slots 7. A groove 11 is provided on the inner wall of the cutter head 1 away from the mounting plate 6, i.e., the inner wall of the cutter head 1 on the rear side of the mounting plate 6. The groove 11 is used to accommodate the movable plate 141. A positioning mechanism 13 and a transfer mechanism 14 are provided in the groove 11. A plurality of positioning mechanisms 13 and transfer mechanisms 14 are provided corresponding to a number of cutting tools 9, wherein the positioning mechanism 13 includes a first pin shaft 12 and a movable rod 131, wherein the first pin shaft 12 is fixedly mounted on the groove wall of the groove 11, and the movable rod 131 is rotatably mounted on the first pin shaft 12.

[0047] Reference Figure 4 and Figure 5 A positioning block 136 is connected to one end of the movable rod 131. In the embodiment of the present application, there are two movable rods 131 and two positioning blocks 136, respectively corresponding to the two mounting plates 6 on the upper and lower sides of the tool 9. A rotating shaft 132 is provided through the free end of the movable rod 131 away from the first pin 12 and is rotatably provided thereon. 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 fixedly connected to a rotating handle 134, so that the rotating shaft 132 can be rotated by applying force to the rotating handle 134.

[0048] Reference Figure 5 A rectangular hole 135 is opened in the middle of the rotating shaft 132 along its own axis, and 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 opened in the middle of the positioning block 136 along its own axis. A cylindrical rod 138 is arranged inside the through hole 137. The outer diameter of the cylindrical rod 138 is adapted to the inner diameter of the through hole 137 to facilitate the sliding of the cylindrical rod 138 in the through hole 137.

[0049] Reference Figure 5 and Figure 6 Specifically, one end of the cylindrical rod 138 is integrally connected to a rectangular rod 139, which slides into engagement with the rectangular hole 135. A threaded section 1310 is integrally fixedly connected to the end of the cylindrical rod 138 away from the rectangular rod 139, which threadedly engages with the screw hole 10. A sliding groove 1311 is defined on the side wall of the positioning block 136 and communicates with the through hole 137. A slider 1312 slides into engagement with the sliding groove 1311. To ensure the sliding stability of the slider 1312, guide grooves 1313 are defined on the top and bottom side walls of the slider 1312 in a direction perpendicular to the axis of the through hole 137. A protrusion (not shown) is fixedly connected to the inner wall of the sliding groove 1311, which slides into engagement with the guide groove 1313 to provide a limiting and guiding function for the slider 1312 during its sliding motion.

[0050] Reference Figure 4 and Figure 5 When installing the positioning block 136, the cylindrical rod 138 is inserted into the through hole 137, and the side wall of the cylindrical rod 138 squeezes the slider 1312, thereby pushing the slider 1312 out of the slide groove 1311 and squeezing the inner wall of the slot 7, thereby ensuring the stability of the position of the positioning block 136 after installation; and when the cylindrical rod 138 is not inserted into the through hole 137 and the positioning block 136 is rotated around the first pin shaft 12 and inserted into the slot 7, the slider 1312 on one side of the positioning block 136 is squeezed back into the slide groove 1311 by the inner wall of the slot 7. At this time, the guide groove 1313 in the slider 1312 slides relative to the protrusion, which is conducive to compensating for the problem of limited space for the rotation and insertion of the positioning block 136.

[0051] Continue to refer to Figure 4 and Figure 5 Furthermore, the rotating shaft 132 is rotatably connected to the movable rod 131 via the bearing 133. One end of the rotating shaft 132 is inserted into the interior of the positioning block 136. The rectangular rod 139 is movably connected to the rotating shaft 132 via the rectangular hole 135. When the threaded section 1310 of the cylindrical rod 138 is fully inserted into the screw hole 10, the rectangular rod 139 is completely retracted into the rectangular hole 135. Push the rectangular rod 139 forward and rotate the handle 134. The handle 134 drives the rectangular rod 139 to rotate via the rotating shaft 132. The rectangular rod 139 drives the cylindrical rod 138 to rotate. At this time, the cylindrical rod 138 is subjected to both 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 screw hole 10 and rotated and tightened (combined with Figure 6 ).

[0052] Reference Figure 4 and Figure 7Furthermore, the outer circumference of the central axis 8 has a pressing surface 81. After the positioning block 136 is inserted into the slot 7, one side contacts the pressing surface 81 of the central axis 8, and the other side contacts the inner wall of the slot 7 via the slider 1312, thereby facilitating stable positioning of the central axis 8. The movable rod 131 is rotatably connected to the cutter head 1 via the first pin 12. The rotational insertion method driven by the movable rod 131 replaces the traditional direct insertion method. After the positioning block 136 and the cylindrical rod 138 are removed, there is no need to carefully place them to prevent loss, and there is no need to excessively adjust the position of the positioning block 136 during installation. This helps to ensure the speed at which the positioning block 136 positions the central axis 8, and the installation efficiency is high.

[0053] Reference Figure 8 and Figure 9 The transfer mechanism 14 includes a movable plate 141, which is rotatably mounted on the first pin 12. A rectangular movable groove 142 is defined at the top of the movable plate 141. An inserting plate 143 is disposed within the movable groove 142. The width of the inserting plate 143 matches the width of the inner wall of the movable groove 142 to facilitate sliding movement of the inserting plate 143 within the movable groove 142. The top of the movable plate 141 also has two latching slots 144 communicating with the movable groove 142. The two latching slots 144 are located on either side of the movable groove 142 in the longitudinal direction. A latching block 145 is fixedly connected to each side of the inserting plate 143. The two latching blocks 145 are slidably engaged in the two latching slots 144 to further ensure the stability of the inserting plate 143 during sliding movement.

[0054] Reference Figure 7 and Figure 8 The longitudinal section of the insert plate 143 is 7-shaped, and a lifting ring 146 is connected to the top of the insert plate 143 for use with a sling of an external crane to facilitate the subsequent lifting and transfer of the insert plate 143. The side wall of the insert plate 143 is vertically connected to the first support rod 147 and the second support rod 148 set horizontally. The first support rod 147 and the second support rod 148 are used to support the bottom of the tool 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 butterfly-shaped. The number of butterflies can be one or two, so the number of the first support rod 147 and the second support rod 148 is two but not limited to two. It is selected according to the shape of the tool 9 actually used. In the embodiment of the present application, the number of the first support rod 147 and the second support rod 148 are both selected as two.

[0055] Reference 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 to 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 to one end away from the first support rod 147 with a hook 1411, and the top of the free end of the second support rod 148 away from the plug plate 143 is provided with a clamping column 1412 corresponding to and engaged with the hook 1411. When the hook 1411 of the limiting rod 1410 is connected with the clamping column 1412, the side wall of the limiting rod 1410 contacts the side wall of the central axis 8 of the tool 9, so as to limit the cutter disc 1 from falling off from the first support rod 147 and the second support rod 148.

[0056] Reference Figure 8 and Figure 9 Furthermore, a latch hole 1481 is defined at the top of the free end of the second support rod 148, away from the insert plate 143. The latch column 1412 slides into the latch hole 1481. A return spring 1482 is disposed within the latch hole 1481. One end of the return spring 1482 is connected to the bottom wall of the latch hole 1481, and the other end is connected to the latch column 1412. One end of the latch column 1412 passes out of the latch hole 1481 under the elastic force of the return spring 1482. When the latch column 1412 slides to a position accommodated in the latch hole 1481, the limiting rod 1410 is less likely to interfere with the tool 9 during the connection process with the latch column 1412, thereby facilitating faster installation and transportation of the tool 9. Furthermore, the above configuration facilitates the rigidity of the limiting rod 1410, thereby fully ensuring the stability of the limiting rod 1410 in limiting the position of the tool 9.

[0057] Continue to refer to Figure 8 and Figure 9 The bottom of the clamping column 1412 is fixedly connected to a pull rod 1413, which is inserted through the second support rod 148 and slidably cooperates with the second support rod 148. One end of the pull rod 1413 inserted through the second support rod 148 is fixedly connected to a gripping portion 1414, so as to facilitate the application of force to achieve the sliding of the clamping column 1412 in the clamping hole 1481. At the same time, the gripping portion 1414 also serves to limit the position of the clamping column 1412, making it difficult for the clamping column 1412 to completely disengage 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.

[0058] Reference Figure 9 and Figure 10When the movable plate 141 rotates around the first pin 12, it can be accommodated in the groove 11, so as to realize the folding and storage of the movable plate 141. By connecting the lifting ring 146 to the lifting device of the crane and pulling it upward, the lifting ring 146 drives the inserting plate 143 to move upward relative to the movable plate 141, and the inserting plate 143 moves upward in the movable groove 142. The clamping block 145 slides upward in the clamping groove 144, so that the inserting plate 143 is separated from the top of the movable plate 141. The inserting plate 143 drives the tool 9 to be lifted via the first support rod 147 and the second support rod 148, which facilitates the lifting and transfer of the disassembled and new tools 9, and is simpler than manual handling.

[0059] 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 insert plate 143, and the first support rod 147 and the second support rod 148 drive the tool 9 to be removed from the installation slot 5, thereby achieving 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, thereby closing 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.

[0060] 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, he 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 cylindrical rod 138 to rotate, so that one end of the cylindrical 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 cylindrical rod 138 is taken out of the screw hole 10. Then, the movable rod 131 is pushed backward to rotate around the first pin 12, and the movable rod 131 drives the positioning block 136 to move. The slider 1312 on one side of the positioning block 136 is squeezed by the inner wall of the slot 7 and inserted into the sliding groove 1311 until the positioning block 136 and the cylindrical rod 138 are removed from the slot 7 together.

[0061] Then, the movable plate 141 is moved forward, and the movable plate 141 drives the inserting plate 143 to move. The inserting plate 143 drives the first support rod 147 and the second support rod 148 to insert 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, supporting the tool 9. The limiting rod 1410 is pushed to rotate around the second pin 149 from the gap in the installation slot 5 on both sides of the tool 9, and the limiting rod 1410 is connected to the clamping column 1412 via the hook 1411, thereby closing the area between the first support rod 147 and the second support rod 148, keeping the tool 9 stably placed on the first support rod 147 and the second support rod 148. Then, the movable plate 141 is moved in the opposite direction to rotate around the first pin 12. The movable plate 141 drives the first support rod 147 and the second support rod 148 to move through the inserting plate 143, and the first support rod 147 and the second support rod 148 drive the tool 9 to be removed from the installation slot 5.

[0062] Then connect the lifting ring 146 to the lifting device of the crane, start the crane to pull the suspension upward, and the lifting ring 146 drives the inserting plate 143 to move upward relative to the movable plate 141, and the inserting plate 143 moves up in the movable groove 142, and the blocking block 145 slides up in the blocking groove 144, so that the inserting plate 143 is disengaged from the top of the movable plate 141, and the inserting plate 143 drives the tool 9 to be lifted through the first support rod 147 and the second support rod 148, and transfers the inserting plate 143 to the loading position on the rear side of the cutter disc 1, and other operators remove the worn tool 9 from the inserting plate 143, and then replace the new tool 9, and then lift the new tool 9 back. The user holds the inserting plate 143 to reinsert it into the movable groove 142, then removes the lifting device of the crane, and moves the movable plate 141 forward to rotate around the first pin 12 and insert it into the mounting groove 5.

[0063] The first support rod 147 and the second support rod 148 drive the new tool 9 to be inserted into the installation groove 5, and the central axis 8 on the upper and lower sides of the tool 9 is inserted into the slot 7. Then the movable rod 131 is pushed forward, and the movable rod 131 drives the positioning block 136 to rotate around the axis of the first pin shaft 12 and insert into the slot 7. The slider 1312 retracts into the slide groove 1311, and then the rectangular rod 139 is pushed forward and the handle 134 is rotated. The handle 134 drives the rectangular rod 139 to rotate via the rotating shaft 132, and 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 is inserted into the screw hole 10 and rotated and tightened. At the same time, the cylindrical rod 138 squeezes the slider 1312 in the through hole 137, pushing the slider 1312 out of the slide groove 1311 to squeeze the inner wall of the slot 7, so that the two sides of the positioning block 136 contact the inner wall of the slot 7 and the central axis 8 respectively, and the central axis 8 is positioned.

[0064] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A long-distance self-excavating hard rock pipe jacking machine, comprising a cutterhead (1), characterized in that: The front side of the cutter disc (1) is provided with a mounting groove (5), a cutter (9) is movably inserted in the mounting groove (5), both ends of the cutter (9) are connected to a central axis (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), and a slot (7) for accommodating the central axis (8) is provided on the side of the two mounting plates (6) facing the cutter (9), and a groove (11) is provided on the inner wall of the cutter disc (1) away from the mounting plate (6), and a positioning mechanism (13) is provided in the groove (11); The positioning mechanism (13) includes a first pin shaft (12) and a movable rod (131), wherein the first pin shaft (12) is rotated on the groove wall of the groove (11), and the movable rod (131) is rotatably mounted on the first pin shaft (12), and a rotating shaft (132) is passed through and rotatably provided at the free end of the movable rod (131) away from the first pin shaft (12), and the movable rod (131) is connected to a positioning block (136), a through hole (137) is passed through the middle of the positioning block (136), and a columnar rod (138) is passed through and slidably provided inside the through hole (137), and a screw hole (10) is provided on the side wall of the mounting plate (6) near the slot (7), and one end of the columnar rod (138) is threadedly engaged with the screw hole (10); The side wall of the positioning block (136) is provided with a slide groove (1311) connected to the through hole (137), a slider (1312) is provided in the slide groove (1311), the slider (1312) is provided with a guide groove (1313) in a direction perpendicular to the axis of the through hole (137), and a protrusion is fixedly connected to the inner wall of the slide groove (1311), and the protrusion is slidably fitted in the guide groove (1313); The rotating shaft (132) is rotatably connected to the movable rod (131) via a bearing (133). The central shaft (8) has a pressing surface (81). When the cylindrical rod (138) is threadedly engaged with the screw hole (10), one side of the positioning block (136) contacts the wall of the slot (7) and the other side contacts the pressing surface (81).

2. The long-distance self-excavating hard rock pipe jacking machine according to claim 1, characterized in that: One end of the columnar rod (138) is fixedly connected to a rectangular rod (139); the rotating shaft (132) is provided with a rectangular hole (135) along its own axis; the rectangular rod (139) is passed through and slidably engaged with the rectangular hole (135); and one end of the rotating shaft (132) away from the positioning block (136) is fixedly connected to a rotating handle (134).

3. The long-distance self-excavating hard rock pipe jacking machine according to claim 1, characterized in that: The cutter disc (1) is further provided with a transfer mechanism (14), the transfer mechanism (14) comprising a movable plate (141) rotatably mounted on a first pin shaft (12), a movable groove (142) being provided on the top of the movable plate (141), a plug plate (143) being slidably connected to the movable groove (142), a first support rod (147) and a second support rod (148) being connected to the side wall of the plug plate (143), the first support rod (147) being rotatably mounted with a limiting rod (1410), the limiting rod (1410) being provided with a hook (1411) at one end away from the first support rod (147), and a clamping column (1412) corresponding to and engaging with the hook (1411) at one end away from the plug plate (143).

4. The long-distance self-excavating hard rock pipe jacking machine according to claim 3, characterized in that: A clamping slot (144) communicating with the movable slot (142) is provided on the top of the movable plate (141); a clamping block (145) is fixedly connected to the inserting plate (143); and the clamping block (145) is slidably engaged in the clamping slot (144).

5. The long-distance self-excavating hard rock pipe jacking machine according to claim 4, characterized in that: A clamping hole (1481) is provided at the top of the second support rod (148), and the clamping column (1412) is slidably fitted in the clamping hole (1481). A return spring (1482) is provided in the clamping hole (1481), and one end of the clamping column (1412) passes through the clamping hole (1481) under the elastic force of the return spring (1482).

6. The long-distance self-excavating hard rock pipe jacking machine according to claim 5, characterized in that: The bottom of the clamping column (1412) is fixedly connected to a pull rod (1413), the pull rod (1413) is passed through the second support rod (148) and slidably cooperates with the second support rod (148), and one end of the pull rod (1413) passed through the second support rod (148) is fixedly connected to a gripping portion (1414).

7. The long-distance self-excavating hard rock pipe jacking machine according to claim 3, characterized in that: A lifting ring (146) is fixedly mounted on the top of the inserting plate (143), and at least two groups of the first supporting rod (147), the second supporting rod (148) and the limiting rod (1410) are distributed along the height direction of the inserting plate (143).

8. A long-distance self-excavating hard rock pipe jacking machine according to any one of claims 3 to 7, characterized in that: Rubber pads (1415) are provided on the tops of the first support rod (147) and the second support rod (148).

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