Abrasive water jet tunneling machine active rotary sand supply device

Abstract

The application provides an abrasive water jet tunneling machine active rotary sand supply device, which is used for storing a sand supply bin of abrasive; a center pipe shaft axially penetrating the sand supply bin, one end of the center pipe shaft being fixedly connected with a center of a cutter head of the tunneling machine and rotating around an axis of the center pipe shaft with the rotating cutter head; a plurality of abrasive conveying devices connected with the sand supply bin and distributed in a circumferential direction of the center pipe shaft; an abrasive flow adjusting device corresponding to the abrasive conveying device; and an abrasive stirring device installed on the center pipe shaft located in the sand supply bin. The abrasive water jet tunneling machine active rotary sand supply device can overcome the difficulty in supplying abrasive caused by rotation of the cutter head and a large installation radius, solve the problems of unstable abrasive flow and difficult accurate control of the abrasive flow, and solve the problem of easy segregation in the abrasive conveying process.

Description

Technical Field

[0001] This invention belongs to the technical field of abrasive waterjet tunnel boring machine components, and relates to an active rotary sand supply device for an abrasive waterjet tunnel boring machine. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] In recent years, the construction of underground spaces such as transportation tunnels and hydraulic tunnels has developed rapidly. Full-face tunnel boring machines (TBMs) are widely used in the construction of highway, railway, and urban subway tunnels due to their advantages such as fast construction speed, high-quality tunnel completion, and high safety. However, when TBMs encounter high-strength, highly abrasive hard rock or underground reinforced concrete obstacles, traditional mechanical tunneling faces engineering problems such as abnormal damage to the cutterhead and cutting tools, and machine jamming, resulting in low safety and slow construction speed. These problems are caused by insufficient rock-breaking ability of the mechanical cutting tools. To solve the problem of insufficient rock-breaking ability of traditional TBMs, and given the strong cutting ability of abrasive water jets, the idea of ​​using abrasive water jets to assist the cutting of the mechanical cutting tools of TBMs has been proposed.

[0004] To achieve abrasive waterjet-assisted mechanical cutting, the abrasive waterjet cutting terminal needs to be mounted on a rotating cutter head. Since abrasive waterjet cutting primarily achieves its effect through the erosive action of high-speed abrasive particles, the abrasive supply significantly impacts the cutting performance. Current technology mainly utilizes the "negative pressure" generated by the high-speed waterjet to draw abrasive from the abrasive supply chamber through the abrasive pipeline into the mixing chamber, where the high-speed waterjet mixes with the abrasive to form the abrasive waterjet. However, this abrasive supply method is affected by the rotation of the cutterhead and the large installation radius, leading to unstable abrasive supply. Specifically, when the abrasive waterjet cutting terminal moves to the upper half of the cutterhead, the abrasive is difficult to enter the mixing chamber through negative pressure due to its own weight. Conversely, when the abrasive waterjet cutting terminal is located on the lower half of the cutterhead, excessive abrasive enters the mixing chamber due to its own weight. When the installation radius is large, the abrasive cannot be effectively absorbed through negative pressure, resulting in problems such as difficulty in abrasive supply, difficulty in quantitative measurement, and instability, leading to uneven jet cutting effect. In addition, the particle size of commonly used abrasives is not uniform, and the abrasive in the sand supply chamber may segregate due to factors such as tunneling machine vibration, which greatly inhibits the performance of the abrasive waterjet. Summary of the Invention

[0005] To address the aforementioned problems, this invention proposes an active rotary sand supply device for abrasive waterjet tunneling machines. This invention overcomes the difficulties in supplying abrasive due to the rotation of the cutterhead and the large installation radius, solves the problems of unstable abrasive flow rate, difficulty in accurately controlling abrasive flow rate, and the segregation problem that easily occurs during abrasive transportation.

[0006] According to some embodiments, the present invention adopts the following technical solution:

[0007] An active rotary sand supply device for an abrasive waterjet tunneling machine includes:

[0008] A sand supply bin used to store abrasive materials;

[0009] A central tube shaft axially passes through the sand supply bin, one end of which is fixedly connected to the center of the tunneling machine cutterhead and rotates around its own axis with the rotating cutterhead.

[0010] A plurality of abrasive conveying devices are connected to the sand supply bin and distributed circumferentially around the central tube axis;

[0011] Corresponding abrasive flow rate regulating device installed on the abrasive conveying device;

[0012] An abrasive mixing device is installed on a central tube shaft located inside the sand supply chamber.

[0013] In the above technical solution, the central tube shaft provides driving force to the abrasive conveying device through the limiting cooperation between the abrasive conveying device, the central tube shaft provides driving force to the abrasive conveying device, which solves the problem of difficult power transmission of the abrasive conveying device and improves the reliability of operation.

[0014] In addition, each abrasive conveying device is equipped with an abrasive flow rate regulating device. The abrasive flow rate supplied by the abrasive conveying device to the abrasive waterjet cutting terminal is adjusted by the abrasive flow rate regulating device, so as to control the cutting performance of the abrasive waterjet by adjusting the abrasive flow rate.

[0015] As an alternative implementation, the sand supply bin includes a static sand bin, a feed inlet, an air outlet, a gear ring, and a rotating baffle. The bottom of the static sand bin is provided with a bottom plate through hole, and the central tube shaft passes through the bottom plate through hole and is slidably connected to the static sand bin.

[0016] The feed inlet is located on the static sand bin and is sealed to the pipeline of the external abrasive supply device.

[0017] The air outlet pipe is installed on the sand settling chamber, with one end extending into the sand settling chamber and the other end placed outside the sand settling chamber;

[0018] The gear ring is fixedly connected to the static sand chamber and is located on the side of the static sand chamber through which the central tube shaft passes.

[0019] The rotating partition is fixedly connected to the central tube shaft, rotates with the central tube shaft, and is slidably and sealingly connected to the static sand chamber.

[0020] Furthermore, the feed inlet and the air outlet are located on the side wall of the static sand bin.

[0021] Furthermore, the inner end of the air outlet pipe is located on the horizontal line corresponding to the maximum volume of the abrasive in the static sand chamber.

[0022] Furthermore, the rotating partition plate is provided with a plurality of partition plate through holes, which are distributed circumferentially around the center position of the rotating partition plate.

[0023] The abrasive enters the sand supply bin through the feed inlet via the pipeline of the external abrasive supply device. The air displaced by the abrasive entering the sand supply bin is discharged through the air outlet pipe. When the abrasive is continuously supplied to the point where it overflows the air outlet pipe, external abrasive cannot be added to the sand supply bin. The feed inlet and the air outlet pipe work together to ensure that the abrasive in the sand supply bin is always full.

[0024] As an alternative implementation, the abrasive conveying device includes bearings, gears, helical blades, and abrasive piping, wherein:

[0025] The bearing is installed in the through hole of the partition plate of the sand supply bin, and the outer ring of the bearing is fixedly connected to the inner wall of the through hole of the partition plate.

[0026] The gear teeth are configured to mesh with the gear ring of the sand supply bin, the gear shaft of the gear is fixedly connected to the inner ring of the bearing, and the gear shaft of the gear is provided with a gear shaft through hole.

[0027] One end of the spiral blade is disposed through the inner ring of the bearing and fixed to the through hole of the gear shaft, and the other end extends into the interior of the static sand chamber.

[0028] One end of the abrasive pipeline is slidably connected to the outer edge of the gear shaft through hole, and the other end is connected to the abrasive flow regulating device.

[0029] Furthermore, a spiral blade cover is provided on the outer side of the spiral blade, one end of the spiral blade cover is fixedly connected to the outer edge of the through hole of the partition on the inner side of the rotating partition, and the other end circumferentially blocks at least a portion of the spiral blade.

[0030] The rotating partition is driven by the rotational power of the cutter head through the central tube shaft, causing it to rotate around the central tube shaft. This, in turn, causes the gear on the rotating partition to revolve around the central tube shaft. The gear ring, fixed to the static sand chamber, remains stationary with the static sand chamber, creating a relative motion tendency with the rotating partition. Under the combined action of the bearing, gear ring, and gear meshing, the gear rotates, and the rotating gear drives the helical blades to rotate. Under the combined action of the helical blade cover, the abrasive is transported from the sand supply chamber to the abrasive pipeline. The internal space of the abrasive pipeline is completely filled with abrasive. Combined with the sliding connection, this ensures the normal delivery of abrasive to the abrasive pipeline while preventing the abrasive pipeline from rotating with the gear.

[0031] The internal space of the abrasive pipeline is filled with abrasive. The abrasive flow rate regulating device is installed at the output end of the abrasive pipeline, and the other end of the abrasive flow rate regulating device is close to the abrasive waterjet cutting terminal. It can precisely adjust the abrasive flow rate and is not affected by the installation radius or the rotation of the cutter head.

[0032] The abrasive flow rate can be completely and precisely controlled by the combination of the abrasive conveying device and the abrasive flow rate regulating device.

[0033] As an alternative implementation, the central tube shaft is coaxial with the sand supply bin.

[0034] As an alternative implementation, there are multiple abrasive conveying devices, with one end of each abrasive conveying device circumferentially arranged on the sand supply bin and the other end circumferentially distributed on the cutter head.

[0035] As an alternative implementation, the central tube shaft has a cavity in the middle to provide space for the high-pressure water transmission device / pipeline, high-pressure gas transmission device / pipeline, and / or control device / line required for the tunneling machine to carry the abrasive water jet system.

[0036] As an alternative implementation, the abrasive flow rate regulating device can be controlled manually or automatically.

[0037] As an alternative implementation, the abrasive stirring device includes a stirring mechanism and a connecting member. The stirring mechanism is detachably mounted on the central tube shaft via the connecting member, and the stirring mechanism includes a plurality of stirring blades / stirring teeth.

[0038] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0039] 1. This invention actively supplies abrasive to the abrasive waterjet cutting terminal through an abrasive conveying device, which solves the problem that the abrasive waterjet cutting terminal on the cutter head has insufficient abrasive absorption capacity due to its large installation radius, resulting in little or no abrasive in the abrasive waterjet.

[0040] 2. This invention achieves effective regulation of abrasive flow rate by combining an abrasive flow rate regulating device and an abrasive conveying device, thereby achieving precise control of the cutting performance of the abrasive waterjet.

[0041] 3. The present invention uses the rotational power of the cutter head to drive the abrasive conveying device and the abrasive stirring device through the central tube shaft, which avoids the need for an external power source, avoids excessive structural complexity, and improves the overall reliability of the device.

[0042] 4. This invention solves the problem of abrasive segregation that is easily caused by factors such as mechanical vibration through an abrasive stirring device, effectively ensuring the performance of abrasive waterjet cutting.

[0043] 5. This invention has a wide range of applications. In addition to being applied to engineering tunneling machines, it can also be applied to related experimental equipment.

[0044] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0045] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0046] Figure 1 This is a three-dimensional structural schematic diagram of the active sand supply device for an abrasive waterjet tunneling machine according to an embodiment of the present invention;

[0047] Figure 2 A three-dimensional structural diagram of an active abrasive supply device (excluding the abrasive flow rate regulating device);

[0048] Figure 3 for Figure 1 A perspective view of the abrasive conveying device shown in the figure;

[0049] Figure 4 for Figure 1 A cross-sectional view of the abrasive conveying device shown;

[0050] Figure 5 for Figure 1 A three-dimensional view of the sand supply bin shown;

[0051] Figure 6 for Figure 1 The cross-sectional view of the sand supply bin and the central tube shaft is shown.

[0052] Figure 7 for Figure 6 A perspective view of the central tube shaft and the abrasive mixing device shown;

[0053] Figure 8 for Figure 6 A perspective view of the abrasive mixing device shown.

[0054] The markings in the attached diagram are as follows:

[0055] 1. Sand supply bin; 11. Static sand bin; 111. Bottom plate through hole; 112. Sliding seal; 12. Feed inlet; 13. Gear ring; 14. Rotating baffle; 141. Baffle through hole; 142. Sliding seal; 15. Air outlet pipe;

[0056] 2. Abrasive mixing device; 21. Mixing teeth; 22. Bolt;

[0057] 3. Central tube shaft;

[0058] 4. Abrasive conveying device; 41. Bearing; 42. Gear; 421. Gear shaft through hole; 422. Sliding joint; 43. Helical blade cover; 44. Helical blade; 45. Abrasive pipeline;

[0059] 5. Abrasive flow rate regulating device;

[0060] 6. Abrasive waterjet cutting terminal;

[0061] 7. Cutter head. Detailed Implementation

[0062] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0063] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0064] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0065] Active sand supply device for abrasive waterjet tunneling machines, such as Figure 1 As shown, it includes:

[0066] Sand supply bin 1;

[0067] The central tube shaft 3 is fixedly connected at one end to the center of the tunneling machine cutterhead 7, and the central tube shaft 3 coincides with the axis of the sand supply bin 1.

[0068] Abrasive conveying device 4 is connected to the sand supply bin 1;

[0069] Abrasive flow rate regulating device 5 is installed on the abrasive conveying device 4 between the abrasive waterjet cutting terminal 6;

[0070] Abrasive mixing device 2 is installed on the central tube shaft 3 located inside the sand supply bin 1;

[0071] By limiting the movement of the abrasive conveying device 4, the central tube shaft 3, and the sand supply bin 1, the central tube shaft 3 is driven by the rotational power of the cutter head to operate the abrasive conveying device 4. This avoids the problem of power transmission difficulties caused by providing power to the abrasive conveying device 4 from an external power source, and improves reliability.

[0072] The abrasive flow rate is adjusted by the abrasive flow rate regulating device 5, which supplies the abrasive to the abrasive waterjet cutting terminal 6 via the abrasive conveying device 4, thereby controlling the cutting performance of the abrasive waterjet by adjusting the abrasive flow rate.

[0073] In some embodiments of the present invention, such as Figure 5 , 6 As shown, the sand supply bin 1 includes: a static sand bin 11, a feed inlet 12, a gear ring 13, a rotating baffle 14, and an air outlet pipe 15. Specifically, the static sand bin 11 does not rotate with the central tube shaft 3, and the bottom of the static sand bin 11 is provided with a bottom plate through hole 111. The central tube shaft 3 passes through the bottom plate through hole 111 and is connected to the static sand bin 11 through a sliding seal 112.

[0074] The feed inlet 12 is located on the static sand bin 11 and is used to add abrasive from the outside into the sand supply bin 1;

[0075] Gear ring 13 is fixedly connected to the static sand chamber 11. The connection method can be bolt connection, welding, etc.

[0076] Rotating partition 14 is fixedly connected to the central tube shaft 3, rotates with the central tube shaft 3, and is sealed to the static sand bin 11 through sliding seal 142; the rotating partition 14 is provided with partition through hole 141.

[0077] The air outlet pipe 15 is installed on the static sand chamber 11. One end of the air outlet pipe extends into the interior of the static sand chamber, and the inner end of the air outlet pipe is located on the horizontal line corresponding to the maximum volume of abrasive in the static sand chamber 11; the other end is placed outside the static sand chamber.

[0078] In this embodiment, the sand supply bin 1 is cylindrical in shape. It has a feed inlet 12 and an air outlet 15 on its side wall.

[0079] Abrasive is fed into the sand supply chamber 1 through the feed inlet 12 via the pipeline of the external abrasive supply device. The air displaced by the abrasive entering the sand supply chamber 1 is discharged through the air outlet 15. When the abrasive is continuously supplied to the point that it overflows the air outlet 15, external abrasive cannot be added to the sand supply chamber 1. The feed inlet 12 and the air outlet 15 work together to ensure that the abrasive in the sand supply chamber is always full.

[0080] In some embodiments of the present invention, the static sand chamber 11 may be connected to an external frame that is in a stationary state.

[0081] In some embodiments of the present invention, the gear ring 13 may be replaced by a structure such as an internal gear or an external gear.

[0082] In some embodiments of the present invention, such as Figure 2 , 3 As shown in Figures 4 and 5, the abrasive conveying device 4 includes: bearing 41, gear 42, spiral blade cover 43, spiral blade 44, and abrasive pipeline 45. Each component will be explained in detail below.

[0083] Bearing 41: Bearing 41 is installed on the outer edge of the through hole 141 of the partition plate, and the outer ring of bearing 41 is fixedly connected to the inner wall of the through hole 141 of the partition plate.

[0084] Gear 42: The teeth of gear 42 are configured to mesh with gear ring 13; the gear shaft of gear 42 is configured to be fixedly connected to the inner ring of bearing 41, and the gear shaft of gear 42 is provided with gear shaft through hole 421.

[0085] Spiral blade cover 43: The spiral blade cover 43 is disposed in the through hole 141 of the partition on the inner side of the rotating partition 14 (the inner side of the sand supply chamber 1) and is fixedly connected to the inner ring of the bearing 41.

[0086] Spiral blade 44: One end of the spiral blade 44 is disposed through the inner ring of the bearing 41 and fixedly connected to the gear shaft through hole 421; the other end is disposed inside the static sand chamber 11 and is in a free state.

[0087] Abrasive pipeline 45: The input end of the abrasive pipeline 45 is connected to the gear shaft through hole 421 on the outside of the gear shaft (opposite to the sand supply chamber 1) through a sliding joint 422, which ensures that the bearing 41 does not interfere with the abrasive pipeline 45 under the premise of normal abrasive transmission; the output end of the abrasive pipeline 45 is connected to the abrasive flow regulating device 5.

[0088] like Figure 2-3 As shown, the cutter head drives the rotating partition 14 to rotate around the central tube shaft 3 via the central tube shaft 3, thereby causing the gear 42 on the rotating partition 14 to revolve around the central tube shaft 3. The gear ring 13, fixed to the static sand chamber 11, remains stationary with the static sand chamber 11, and has a relative motion tendency with the rotating partition 14, which is rotating. Under the combined action of the gear ring 13 and the gear 42 meshing, the gear 42 rotates. The rotating gear 42 drives the helical blade 44 to rotate, and under the combined action of the helical blade cover 43, the abrasive is conveyed outward from the sand supply chamber 1. Through the sliding joint 422, the abrasive pipeline 45 is prevented from rotating with the gear 42 while ensuring that the abrasive is normally conveyed to the abrasive pipeline 45.

[0089] In this embodiment, as Figure 4 As shown, the spiral blade cover 43 is in the shape of a trumpet with a gradually increasing diameter.

[0090] In some embodiments of the present invention, the number of abrasive conveying devices 4 can be adjusted according to actual needs; the type, size, gear ratio and other parameters of the gear ring 13 and gear 42 can be adjusted according to actual needs.

[0091] In some embodiments of the present invention, such as Figure 1 As shown, the abrasive flow regulating device 5 is used to control the connection between the output end of the abrasive pipeline 45 and the abrasive waterjet cutting terminal 6. The control methods of the abrasive flow regulating device 5 include, but are not limited to, one or more of manual adjustment and computer remote control adjustment. In some embodiments of the present invention, the abrasive flow regulating device 5 can be selected from existing equipment such as valves and control valves.

[0092] In some embodiments of the present invention, such as Figure 6 , 7 As shown in Figure 8, the abrasive mixing device 2 includes mixing teeth 21 and bolts 22. The mixing teeth 21 are fixed to the outer wall of the central tube shaft 3 by the bolts 22. The abrasive mixing device 2 can be used to mix mixed abrasives (multiple types, multiple particle sizes, etc.) located inside the sand supply bin 1; the abrasive mixing device 2 can also be used to mix a single abrasive. The abrasive mixing device 2 can be quickly installed and disassembled according to the user's actual needs. The mixing teeth 21 can also be replaced with blades or other mechanisms with mixing functions, and the connection method can be changed to welding or other methods.

[0093] Of course, in other embodiments, the stirring teeth can be replaced with other stirring blades.

[0094] In some embodiments of the present invention, the abrasive water jet system is mounted on a tunneling machine, which requires solving the problem of transmitting high-pressure water, high-pressure gas, etc. The central tube shaft 3 can also provide transmission space for high-pressure water transmission devices / pipelines, high-pressure gas transmission devices / pipelines, control devices / lines, etc.

[0095] In the above embodiments, the number / shape of each element can be changed according to specific circumstances, and is not limited to the number / shape shown in the text or drawings.

[0096] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. An active rotary sand supply device for an abrasive waterjet tunneling machine, characterized in that, include: A sand supply bin used to store abrasive materials; A central tube shaft axially passes through the sand supply bin, one end of which is fixedly connected to the center of the tunneling machine cutterhead and rotates around its own axis with the rotating cutterhead. A plurality of abrasive conveying devices are connected to the sand supply bin and distributed circumferentially around the central tube axis; Corresponding abrasive flow rate regulating device installed on the abrasive conveying device; An abrasive mixing device is installed on a central tube shaft located inside the sand supply chamber.

2. The active rotary sand supply device for an abrasive waterjet tunneling machine as described in claim 1, characterized in that, The sand supply bin includes a static sand bin, a feed inlet, an air outlet, a gear ring, and a rotating baffle. The bottom of the static sand bin is provided with a bottom plate through hole, and the central tube shaft passes through the bottom plate through hole and is slidably connected to the static sand bin. The feed inlet is located on the static sand bin and is sealed to the pipeline of the external abrasive supply device. The air outlet pipe is installed on the sand settling chamber, with one end extending into the sand settling chamber and the other end placed outside the sand settling chamber; The gear ring is fixedly connected to the static sand chamber and is located on the side of the static sand chamber through which the central tube shaft passes. The rotating partition is fixedly connected to the central tube shaft, rotates with the central tube shaft, and is slidably and sealingly connected to the static sand chamber.

3. The active rotary sand supply device for an abrasive waterjet tunneling machine as described in claim 2, characterized in that, The feed inlet and air outlet are located on the side wall of the static sand silo.

4. The active rotary sand supply device for an abrasive waterjet tunneling machine as described in claim 2 or 3, characterized in that, The inner end of the vent pipe is located on the horizontal line corresponding to the maximum volume of the abrasive in the static sand chamber.

5. The active rotary sand supply device for an abrasive waterjet tunneling machine as described in claim 2, characterized in that, The rotating partition plate is provided with multiple partition through holes, which are distributed circumferentially around its center position.

6. The active rotary sand supply device for an abrasive waterjet tunneling machine as described in claim 5, characterized in that, The abrasive conveying device includes bearings, gears, spiral blades, and abrasive pipelines, wherein: The bearing is installed in the through hole of the partition plate of the sand supply bin, and the outer ring of the bearing is fixedly connected to the inner wall of the through hole of the partition plate. The gear teeth are configured to mesh with the gear ring of the sand supply bin, the gear shaft of the gear is fixedly connected to the inner ring of the bearing, and the gear shaft of the gear is provided with a gear shaft through hole. One end of the spiral blade is disposed through the inner ring of the bearing and fixed to the through hole of the gear shaft, and the other end extends into the interior of the static sand chamber. One end of the abrasive pipeline is slidably connected to the outer edge of the gear shaft through hole, and the other end is connected to the abrasive flow regulating device.

7. The active rotary sand supply device for an abrasive waterjet tunneling machine as described in claim 6, characterized in that, A spiral blade cover is provided on the outside of the spiral blade. One end of the spiral blade cover is fixed to the outer edge of the through hole of the partition on the inner side of the rotating partition, and the other end circumferentially covers at least a portion of the spiral blade.

8. The active rotary sand supply device for an abrasive waterjet tunneling machine as described in claim 1, characterized in that, The central tube shaft is coaxial with the sand supply bin.

9. The active rotary sand supply device for an abrasive waterjet tunneling machine as described in claim 1, characterized in that, The abrasive conveying device comprises multiple devices, with one end of each device circumferentially positioned on the abrasive supply bin and the other end circumferentially distributed on the cutter head.

10. An active rotary sand supply device for an abrasive waterjet tunneling machine as described in claim 1 or 2, characterized in that, The central tube shaft has a cavity in the middle, which provides space for the high-pressure water transmission device / pipeline, high-pressure gas transmission device / pipeline and / or control device / line required for the abrasive water jet system of the tunneling machine.

11. The active rotary sand supply device for an abrasive waterjet tunneling machine as described in claim 1, characterized in that, The abrasive flow rate regulating device is located at the output end of the abrasive pipeline, which is connected to the abrasive waterjet cutting terminal. The abrasive flow rate regulating device can be controlled manually or automatically.

12. The active rotary sand supply device for an abrasive waterjet tunneling machine as described in claim 1, characterized in that, The abrasive stirring device includes a stirring mechanism and a connecting member. The stirring mechanism is detachably mounted on the central tube shaft via the connecting member. The stirring mechanism includes a plurality of stirring blades / stirring teeth.

Images