A kind of anti-blocking screw conveyor for liaison channel pipe jacking machine

Abstract

The present application relates to the technical field of tunnel excavation construction, and particularly relates to a screw conveyor for preventing blockage in a connecting channel pipe jacking machine, which comprises a conveying pipe, a main shaft and a propeller arranged on the main shaft are arranged in the conveying pipe, a motor for driving the main shaft to rotate is arranged on the main shaft, a plurality of water delivery hole portions are arranged on the main shaft in a staggered manner, a rotatable cutter is arranged at the water delivery hole portion, an external high-pressure water pipe is connected to the side of the main shaft, a water delivery automatic control device is arranged at the connection between the main shaft and the external high-pressure water pipe, the external high-pressure water pipe is arranged perpendicularly to the main shaft, and the rotatable cutter is electrically connected to the water delivery automatic control device; the screw conveyor is provided with an automatic control device, and the rotatable cutter is started to cooperate with the external high-pressure water pipe to flow high-pressure water into the main shaft of the screw conveyor to loosen and impact the spoil before blockage occurs in the screw conveyor, so that the blockage caused by spoil transportation during the working process of the screw conveyor can be effectively prevented, and the normal construction can be ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel excavation construction, in particular to a spiral conveyor for preventing blockage in a connecting channel pipe jacking machine. BACKGROUND

[0002] The pipe jacking machine is a kind of tunneling machine commonly used in tunnel construction. When the pipe jacking machine excavates the soil in front of the tunnel in the soil pressure balance mode, the excavated soil in front of the pipe jacking machine needs to be transported to the outside through the spiral conveyor.

[0003] When the pipe jacking machine is excavating, if it encounters a clay layer with low water content, the excavated soil has low flowability after entering the spiral conveyor, which can easily block the spiral conveyor, affecting the normal excavation of the pipe jacking machine, and it takes a long time to remove the blocked excavated soil, which greatly reduces the construction progress.

[0004] After the spiral conveyor is blocked, the construction progress will be delayed, so in this case, finding a method to quickly prevent the spiral conveyor from being blocked will greatly improve the efficiency of the construction and ensure the reliability, convenience and speed of the shield tunneling. SUMMARY

[0005] The present application provides a spiral conveyor for preventing blockage in a connecting channel pipe jacking machine, which aims to solve the problem of pipe jacking machine stopping due to blockage of the spiral conveyor.

[0006] In order to achieve the above purpose, the present application provides a spiral conveyor for preventing blockage in a connecting channel pipe jacking machine, which comprises a conveying pipe, a main shaft and a propeller provided on the main shaft are arranged in the conveying pipe, a motor is arranged on the main shaft to drive the rotation of the main shaft, a plurality of water inlet holes are arranged on the main shaft in a staggered manner, a rotatable cutter is arranged at the water inlet hole, an external high-pressure water pipe is connected to the side of the main shaft, a water inlet automatic control device is arranged at the connection between the main shaft and the external high-pressure water pipe, the external high-pressure water pipe is arranged vertically to the main shaft, and the rotatable cutter is electrically connected to the water inlet automatic control device.

[0007] As an optional embodiment, in the spiral conveyor for preventing blockage in a connecting channel pipe jacking machine provided by the present application, the rotatable cutter comprises a mounting portion provided with an opening and a rotating blade provided on the mounting portion, the mounting portion is rotatably connected to the water inlet hole through a bearing, the opening is concentrically arranged with the water inlet hole, the rotating blade is rotatably connected to the mounting portion through a latch, and the mounting portion is provided with a contraction groove for placing the rotating blade.

[0008] As an optional embodiment, in the anti-blocking screw conveyor for the pipe jacking machine of the contact channel, the number of the rotating blades is three, and the adjacent rotating blades are distributed at an angle of 120°.

[0009] As an optional embodiment, in the anti-blocking screw conveyor for the pipe jacking machine of the contact channel, the three rotating blades are distributed in a stepped manner on the mounting portion.

[0010] As an optional embodiment, in the anti-blocking screw conveyor for the pipe jacking machine of the contact channel, the main shaft comprises a main shaft outer wall and a main shaft inner wall, and a middle layer empty space is arranged between the main shaft outer wall and the main shaft inner wall. One side of the middle layer empty space is provided with a magnetic copper block, and the other side is provided with a middle layer rotating wall matched with the magnetic copper block. The magnetic copper block is used to control the sliding of the middle layer rotating wall in the middle layer empty space to open or block the water conveying hole portion.

[0011] As an optional embodiment, in the anti-blocking screw conveyor for the pipe jacking machine of the contact channel, the middle layer rotating wall comprises a rotating portion and a fixed portion. The rotating portion is provided with a groove at one end away from the magnetic copper block. The fixed portion is inserted into the groove of the rotating portion and connected to the bottom of the groove through a first spring. The two side protrusions at the tail of the fixed portion are connected to the two ports of the groove through a second spring. The magnetic copper block controls the sliding of the rotating portion in the middle layer empty space.

[0012] As an optional embodiment, in the anti-blocking screw conveyor for the pipe jacking machine of the contact channel, a torque monitoring device is arranged on the main shaft, and the torque monitoring device is electrically connected with the water conveying automatic control device.

[0013] As an optional embodiment, in the anti-blocking screw conveyor for the pipe jacking machine of the contact channel, a friction sensor is arranged on the propeller.

[0014] As an optional embodiment, in the anti-blocking screw conveyor for the pipe jacking machine of the contact channel, a gasket is arranged at the connection between the main shaft and the outer high-pressure water pipe.

[0015] As an optional embodiment, in the anti-blocking screw conveyor for the pipe jacking machine of the contact channel, the propeller blades of the propeller are arranged at intervals from the water conveying hole portion.

[0016] Compared with the prior art, the beneficial effects of the technical scheme of the present application are: the automatic control device is arranged in the anti-blocking screw conveyor in the contact channel pipe jacking machine, and the rotatable cutter is used to cooperate with the external high-pressure water pipe to flow high-pressure water into the main shaft of the conveyor to loosen and impact the slag soil before the internal blocking of the screw conveyor, so that the blocking of the screw conveyor during the operation due to the slag soil transportation can be effectively prevented, and the normal construction can be ensured; on the one hand, the rotatable cutter can loosen the soil mechanically, and on the other hand, the high-pressure water flow can enter the pre-blocking place through the water delivery hole arranged on the main shaft and the wall of the main shaft, disperse the slag soil pre-blocked in the screw conveyor of the pipe jacking machine, and achieve the purpose of removing the pre-blocked slag soil, so that the screw conveyor can work normally, the pipe jacking machine can normally excavate and construct, the construction delay due to the blocking of the screw conveyor can be avoided, and the construction efficiency is improved.

[0017] Specifically, the working principle of the anti-blocking screw conveyor in the contact channel pipe jacking machine provided by the present application is: when the screw conveyor works normally, the rotatable cutter is retracted and integrated with the screw conveyor to ensure that the screw conveyor works normally; at this time, the rotating middle layer rotating wall is rotated to close the water delivery hole and the entire middle layer empty area, so as to prevent the slag soil in the screw conveyor from entering the water delivery channel; when the screw conveyor is pre-blocked, the middle layer rotating wall closing the water delivery hole is reversely rotated to expose the water delivery hole, open the high-pressure water flow, and cooperate with the cutter rotating at high speed to achieve the purpose of dredging the screw conveyor. Through the automatic control device, automatic control is realized, the operation is simple and convenient, and it is very flexible. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0019] Figure 1 The overall schematic diagram of the external water pipe for the anti-blocking screw conveyor in the contact channel pipe jacking machine provided by the present application is shown in the figure.

[0020] Figure 2 The structure schematic diagram of the internal main shaft for the anti-blocking screw conveyor in the contact channel pipe jacking machine provided by the present application is shown in the figure.

[0021] Figure 3 The local schematic diagram of the anti-blocking screw conveyor in the contact channel pipe jacking machine provided by the present application in the working state is shown in the figure.

[0022] Figure 4A structure schematic diagram of the rotatable cutter provided by the present application is shown in the figure;

[0023] Figure 5 A structure schematic diagram of the rotatable cutter provided by the present application is shown in the figure;

[0024] Figure 6 A structure schematic diagram of the main shaft wall of the anti-blocking screw conveyor in the communication channel pipe jacking machine provided by the present application is shown in the figure;

[0025] Figure 7 A structure schematic diagram of the main shaft wall of the anti-blocking screw conveyor in the communication channel pipe jacking machine provided by the present application is shown in the figure;

[0026] Figure 8 A structure schematic diagram of the middle layer rotating wall provided by the present application is shown in the figure.

[0027]

Explanation of the reference signs

[0028] 1, conveying pipe; 2, main shaft; 3, screw propeller; 4, motor; 5, water delivery hole part; 6, rotatable cutter; 60, mounting part; 61, rotating blade; 62, bolt; 63, contraction groove; 7, external high-pressure water pipe; 8, water delivery automatic control device; 9, main shaft outer wall; 10, main shaft inner wall; 11, middle layer empty area; 12, magnetic copper block; 13, middle layer rotating wall; 131, rotating part; 132, fixed part; 133, first spring; 134, second spring; 14, torque monitoring device; 15, friction sensor. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0030] It should be noted that all the directionality indications such as first, second, upper, lower, left, right, front, back, and the like in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between the components in a certain specific posture such as shown in the drawings, and if the specific posture changes, the directionality indications also change accordingly.

[0031] In addition, the technical solutions in the embodiments of the present application can be combined with each other, but it must be based on the fact that those skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0032] The application provides a kind of anti-jamming screw conveyor for liaison channel pipe jacking machine, as shown in Figures 1-3 It includes: conveying pipe 1, the main shaft 2 and the propeller on the main shaft 2 are arranged in the conveying pipe 1, the motor 4 for driving the rotation of the main shaft 2 is arranged on the main shaft 2, a plurality of water delivery hole parts 5 are arranged on the main shaft 2, the rotatable cutter 6 is arranged at the water delivery hole part 5, the external high-pressure water pipe 7 is connected to the side of the main shaft 2, the external high-pressure water pipe 7 is arranged on the side without affecting the work of the main shaft 2, and the water pipe will not be wound when the main shaft 2 rotates, the water delivery automatic control device 8 is arranged at the connection between the main shaft 2 and the external high-pressure water pipe 7, the external high-pressure water pipe 7 is arranged vertically to the main shaft 2, and the rotatable cutter 6 is electrically connected to the water delivery automatic control device 8. The automatic control device is arranged in the anti-jamming screw conveyor for liaison channel pipe jacking machine provided by the application, and the rotatable cutter 6 cooperates with the external high-pressure water pipe 7 to flow high-pressure water into the main shaft 2 of the screw conveyor to loosen and impact the slag soil before the jamming occurs in the screw conveyor, which can effectively prevent the jamming caused by slag soil transportation during the working process of the screw conveyor, thereby ensuring the normal construction; on the one hand, the rotatable cutter 6 can loosen the soil mechanically, and on the other hand, the high-pressure water flow can enter the pre-jamming position through the water delivery hole part 5 arranged on the main shaft 2 and the wall of the main shaft 2, disperse the slag soil pre-jammed in the pipe jacking machine screw conveyor, and achieve the purpose of removing the pre-jammed slag soil, so that the screw conveyor can work normally to ensure that the pipe jacking machine can normally excavate and construct, avoid the delay of construction caused by the jamming of the screw conveyor, and improve the construction efficiency. The water flow enters the inside of the main shaft 2 through the external high-pressure water pipe 7, then enters the soil conveying position outside the main shaft 2 of the screw conveyor through the water delivery hole part 5 arranged on the wall of the main shaft 2, disperses the pre-jammed slag soil by using the high-pressure water flow, and then makes it work normally.

[0033] Further, as shown in Figure 4 and Figure 5As shown, in the anti-clogging screw conveyor for pipe jacking machine in connecting passage provided by the present invention, the rotatable cutter 6 includes a mounting part 60 with an opening and a rotating blade 61 disposed on the mounting part 60. The mounting part 60 is rotatably connected to the water inlet part 5 through a bearing, thereby enabling the rotatable cutter 6 to rotate. The opening is concentrically arranged with the water inlet part 5. The rotating blade 61 is rotatably connected to the mounting part 60 through a pin 62. The mounting part 60 is provided with a shrinkage groove 63 for placing the rotating blade 61. The device is concentrically arranged with the water inlet section 5 and distributed within a certain range of the outer diameter of the water inlet section 5. When the screw conveyor is working normally, the rotatable cutter 6 is in a retracted state and retracted into the mounting part 60. When it is needed to work, the automatic water conveying control device 8 is activated, so that it can protrude from inside the screw main shaft 2 and open the hidden rotating blade 61 inside to start rotating and start high-speed rotation to loosen the slag. At the same time, the high-pressure water flow passes through the water inlet section 5 to impact the slag at the pre-blockage position. With the mechanical loosening of the rotatable cutter 6 and the high-pressure water flow, the slag is dispersed and transported to the outside, which plays a role in preventing blockage.

[0034] Preferably, there are three rotating blades 61, arranged at 120° intervals between adjacent blades. The three blades 61 are positioned in a stepped manner on the mounting portion 60 to better distribute force on the surrounding soil. The different vertical positions of the three blades facilitate better cutting of loose, localized areas of soil. When the rotating blades 61 need to be activated or retracted, the pin 62 operates to accommodate their movement, allowing them to extend from or retract into the retraction groove 63. When the device is not needed, the rotating blades 61 retract into the retraction groove 63, forming a smooth cylinder to ensure the normal operation of the screw conveyor. The high-pressure water flow used here contains a foaming agent, which, upon contact with the soil, loosens it and allows it to be dispersed under the impact of the high-pressure water flow, enabling it to be transported to the outside by the screw conveyor.

[0035] As an optional implementation, in the anti-clogging screw conveyor for a pipe jacking machine in a connecting channel provided by the present invention, the main shaft 2 includes an outer wall 9 and an inner wall 10. A middle layer empty area 11 is provided between the outer wall 9 and the inner wall 10. A magnetic copper block 12 is provided on one side of the middle layer empty area 11, and a middle layer rotating wall 13 that cooperates with the magnetic copper block 12 is provided on the other side. The magnetic copper block 12 is used to control the middle layer rotating wall 13 to slide within the middle layer empty area 11 to open or block the water inlet 5. In addition, multiple middle layer empty areas 11 can be provided.

[0036] Furthermore, such as Figure 8As shown, the middle layer rotating wall 13 includes a rotating part 131 and a fixed part 132, the rotating part 131 is provided with a groove at one end away from the magnetic copper block 12, the fixed part 132 is inserted into the groove of the rotating part 131 and connected with the bottom of the groove through the first spring 133, the lugs at both sides of the tail of the fixed part 132 are connected with the two ports of the groove through the second spring 134, the magnetic copper block 12 controls the sliding of the rotating part 131 in the middle layer empty area 11. When it is needed to close the water hole part 5, the rotating part 131 rotates to the position of the water hole part 5 under the action of the magnetic force, when it is not needed to close the water hole part 5, the magnetic force disappears, the rotating part 131 returns to the original position under the action of the pulling force of the first spring 133 and the second spring 134, and is combined with the fixed part 132 to form an integral whole.

[0037] As shown in the drawings, Figure 6 and Figure 7 The working principle of the middle layer rotating wall 13 in the middle layer empty area 11 is as follows: when the screw conveyor is in the normal working state and is not blocked, the water hole part 5 on the wall of the screw conveyor of the present application is closed by the middle layer rotating wall 13, so that the wall of the screw main shaft 2 of the whole screw conveyor is in a closed state, so as to prevent the muck conveyed by the screw conveyor from entering the water conveying channel inside the screw main shaft 2 through the water hole part 5 provided on the screw main shaft 2, causing the water conveying channel to be blocked, so as to avoid affecting the use, at this time, the magnetic copper block 12 is energized to have strong magnetism, attracting the middle layer rotating wall 13 on the opposite side to rotate, the middle layer rotating wall 13 gradually rotates from one side of the water hole part 5 until the water hole part 5 is closed and the whole wall is closed. When it is needed to start the device, the magnetic copper block 12 is de-energized, the magnetic force disappears, the middle layer rotating wall 13 rotates from the water hole part 5 to the original position, so that the water hole part 5 is exposed, so that the whole device can work normally.

[0038] Further, in the anti-blocking screw conveyor provided in the connecting channel pipe jacking machine, a torque monitoring device 14 is arranged on the main shaft 2, and the torque monitoring device 14 is electrically connected with the water conveying automatic control device 8. The device can monitor the torque of the screw main shaft 2 of the screw conveyor, when the torque increases to a certain degree, a signal is fed back to the water conveying automatic control device 8 inside the screw conveyor, and the water conveying automatic control device 8 performs the next operation. The torque monitoring device 14 is used to monitor the torque of the main shaft 2 inside the screw conveyor, when the torque monitoring device 14 senses that the torque of the main shaft 2 decreases to a certain level, it is predicted that the screw conveyor inside may be blocked, at this time, the rotatable cutter 6 and the high-pressure water flow switch are started, the soil that is about to be blocked is cut and loosened by the rotating blade 61 and is impacted by the high-pressure water flow, so that the soil that is about to be blocked in the screw conveyor is dispersed, and then can be conveyed to the outside through the screw conveyor.

[0039] As an optional embodiment, in the anti-blocking screw conveyor provided by the application for the contact channel pipe jacking machine, a friction sensor 15 is arranged on the propeller. The friction sensor 15 arranged on the propeller blade 3 can sense the friction resistance of the propeller blade 3 at different positions. When the friction resistance of the propeller blade 3 at a position is sensed to increase, a signal is fed back to the internal water conveying automatic control device 8. The water conveying automatic control device 8 opens the water conveying hole part 5 at the position where the friction resistance increases, so as to impact the pre-blocking earth material at the position, increase the foaming property of the earth material, reduce the internal friction, and then the earth material is conveyed to the outside.

[0040] Further, a gasket is arranged at the connection between the main shaft 2 and the external high-pressure water pipe 7, so as to prevent water leakage. The external high-pressure water pipe 7 and the water conveying pipe inside the main shaft 2 are fixedly connected by bolts.

[0041] In the anti-blocking screw conveyor provided by the application for the contact channel pipe jacking machine, the propeller blade of the propeller and the water conveying hole part 5 are arranged at intervals. A series of water conveying hole parts 5 are arranged on the main shaft 2. The water conveying hole parts 5 are arranged in order to enable the water in the water conveying channel inside the screw main shaft 2 of the screw conveyor to enter the outside of the screw main shaft 2 of the screw conveyor through the water conveying hole parts 5, so as to impact the pre-blocking earth material. The plurality of water conveying hole parts 5 are uniformly distributed along a certain distance and present different angle ranges, and are arranged staggeredly, so as to enable the high-pressure water in the water conveying channel inside the screw main shaft 2 of the screw conveyor to enter different pre-blocking positions through the water conveying hole parts 5 at different positions, and then the rotatable cutter 6 at the water conveying hole part 5 can quickly realize dredging of the pre-blocking position of the earth material in the screw conveyor.

[0042] Specifically, the working principle of the anti-blocking screw conveyor provided by the application for the contact channel pipe jacking machine is as follows: when the screw conveyor works normally, the rotatable cutter 6 is retracted and integrated with the screw conveyor, so that the screw conveyor can work normally. At this time, the middle layer rotating wall 13 is rotated to close the water conveying hole part 5 and the entire middle layer empty area 11, so as to prevent the earth material in the screw conveyor from entering the water conveying channel. When the screw conveyor is pre-blocked, the middle layer rotating wall 13 closing the water conveying hole part 5 is reversely rotated to expose the water conveying hole part 5, open the high-pressure water flow, and cooperate with the cutter which can rotate at high speed to achieve the purpose of dredging the screw conveyor. The automatic control device is automatically controlled, and the operation is simple and very flexible.

[0043] It should be understood that the embodiments of the present application described above are merely intended to illustrate the technical route and features of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, but the present application is not limited to the above specific embodiments. Any changes or modifications made within the scope of the claims of the present application should be covered within the protection scope of the present application.

Claims

1. A screw conveyor for preventing blockage in a pipe jacking machine for connecting passages, characterized in that, The system includes a delivery pipe (1), a main shaft (2) and a propeller mounted on the main shaft (2) are provided inside the delivery pipe (1), a motor (4) is provided on the main shaft (2) to drive its rotation, a plurality of staggered water delivery holes (5) are provided on the main shaft (2), a rotatable cutter (6) is provided at the corresponding location of the water delivery holes (5), an external high-pressure water pipe (7) is connected to the side of the main shaft (2), an automatic water delivery control device (8) is provided at the connection between the main shaft (2) and the external high-pressure water pipe (7), the external high-pressure water pipe (7) is arranged perpendicularly to the main shaft (2), and the rotatable cutter (6) is electrically connected to the automatic water delivery control device (8); the rotatable cutter (6) includes a mounting part with an opening. (60) and a rotating blade (61) provided on the mounting part (60). The mounting part (60) and the water supply hole part (5) are rotatably connected by a bearing. The opening is concentrically set with the water supply hole part (5). The rotating blade (61) is rotatably connected to the mounting part (60) by a pin (62). The mounting part (60) is provided with a shrinkage groove (63) for placing the rotating blade (61). When it is needed to work, the automatic water supply control device (8) is turned on. The rotatable cutter (6) can protrude from the inside of the main shaft (2) and open the internally hidden rotating blade (61) and rotate. At the same time, the high-pressure water flow impacts the slag at the pre-blocking position through the water supply hole part (5).

2. The anti-clogging screw conveyor for a pipe jacking machine in a connecting passage according to claim 1, characterized in that, The number of the rotating blades (61) is three, and the adjacent rotating blades (61) are distributed at 120°.

3. The anti-clogging screw conveyor for a pipe jacking machine in a connecting passageway according to claim 2, characterized in that, The three rotating blades (61) are positioned in a stepped manner on the mounting portion (60).

4. The anti-clogging screw conveyor for a pipe jacking machine in a connecting passageway according to claim 1, characterized in that, The main shaft (2) includes an outer wall (9) and an inner wall (10). A middle empty area (11) is provided between the outer wall (9) and the inner wall (10). A magnetic copper block (12) is provided on one side of the middle empty area (11), and a middle rotating wall (13) that cooperates with the magnetic copper block (12) is provided on the other side. The magnetic copper block (12) is used to control the middle rotating wall (13) to slide in the middle empty area (11) to open or block the water delivery hole (5).

5. The anti-clogging screw conveyor for a pipe jacking machine in a connecting passageway according to claim 4, characterized in that, The middle layer rotating wall (13) includes a rotating part (131) and a fixed part (132). The rotating part (131) has a groove at one end away from the magnetic copper block (12). The fixed part (132) is inserted into the groove of the rotating part (131) and connected to the bottom of the groove through a first spring (133). The two protrusions at the tail of the fixed part (132) are connected to the two ends of the groove through a second spring (134). The magnetic copper block (12) controls the rotating part (131) to slide in the middle layer empty area (11).

6. The anti-clogging screw conveyor for a pipe jacking machine in a connecting passageway according to any one of claims 1-5, characterized in that, The main shaft (2) is equipped with a torque monitoring device (14), which is electrically connected to the water conveyance automatic control device (8).

7. The anti-clogging screw conveyor for a pipe jacking machine in a connecting passageway according to any one of claims 1-5, characterized in that, The propeller is equipped with a friction sensor (15).

8. The anti-clogging screw conveyor for a pipe jacking machine in a connecting passageway according to any one of claims 1-5, characterized in that, A gasket is provided at the connection between the main shaft (2) and the external high-pressure water pipe (7).

9. The anti-clogging screw conveyor for a pipe jacking machine in a connecting channel according to claim 1, wherein the propeller blades of the propeller are spaced apart from the water inlet (5).

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