Anti-blocking screw conveyor for use in a communication passage earth pressure balance shield machine

Abstract

The application discloses a kind of anti-jamming screw conveyors for communication passage earth pressure balance shield machine, including conveying pipe and be placed in the conveying pipe and fixed on the screw propeller of main shaft, the screw conveyor further includes water delivery pipeline and adjusting structure, the water delivery pipeline is placed outside the conveying pipe and along the axial extension of the conveying pipe, the water delivery pipeline is communicated with the inside of the conveying pipe by the through hole on the conveying pipe, the conveying pipe is opened with cavity along the axial direction, the adjusting structure is placed in the cavity, the adjusting structure is electrically connected with automatic control equipment and the adjusting structure can be opened and closed for opening or closing the through hole;The present application is impacted by high-pressure water flow in the pre-jamming muck inside screw conveyer, so that it can flow out through the front nozzle under the action of high-pressure water flow, and then make the screw conveyer keep unobstructed, stably work;For preventing the problem that muck causes screw conveyer to jam.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of shield tunnel construction, and particularly relates to a spiral conveyor for preventing blockage in a soil pressure balance shield machine of a communication passage. BACKGROUND

[0002] A shield machine is a core machine for tunnel construction, and in the process of underground tunnel construction, the shield machine is usually used to excavate the soil in front, so as to achieve the purpose of tunneling. The excavated soil by the front device of the shield machine is transported to the outside through a spiral conveyor. When the shield machine is tunneling, if a sand layer with large water permeability is encountered, the excavated soil is prone to blockage in the spiral conveyor after entering the spiral conveyor due to the loss of water, which affects the normal tunneling of the shield machine. It takes a long time to remove the blocked excavated soil, which greatly reduces the construction progress.

[0003] A shield machine shell structure with patent number CN202122818618.7, the cooperation of the cutter head and the filter screen cover can further crush the mud blocks and gravel in the crushing cabin, making the particle size of the gravel smaller, facilitating the gravel to pass through the filter screen cover and enter the mud water cabin for external discharge, thereby effectively preventing the discharge pipe in the mud discharge system from being blocked. However, it cannot solve the problem of blockage of the spiral conveyor in the shield machine caused by the above-mentioned situation.

[0004] After the spiral conveyor of the shield machine is blocked, the construction progress will be delayed, so in this case, a technology that can quickly prevent the blockage of the spiral conveyor of the shield machine will greatly improve the efficiency of the construction and ensure the reliability, convenience and speed of the shield tunneling. SUMMARY

[0005] The purpose of the present application is to provide a spiral conveyor for preventing blockage in a soil pressure balance shield machine of a communication passage, which solves the problem that when the shield machine is tunneling, if a sand layer with large water permeability is encountered, the excavated soil is prone to blockage in the spiral conveyor after entering the spiral conveyor due to the loss of water, which affects the normal tunneling of the shield machine. It takes a long time to remove the blocked excavated soil, which greatly reduces the construction progress.

[0006] The present application is implemented as follows: a spiral conveyor for preventing blockage in a soil pressure balance shield machine of a communication passage, comprising a conveying pipe and a propeller fixed on a main shaft in the conveying pipe, the spiral conveyor further comprising a water conveying pipe and an adjusting structure, the water conveying pipe being placed outside the conveying pipe and extending along the axial direction of the conveying pipe, the water conveying pipe being in communication with the inside of the conveying pipe through a through hole on the conveying pipe, the conveying pipe being provided with a cavity in the axial direction, the adjusting structure being placed in the cavity, the adjusting structure being electrically connected with an automatic control device and being openable and closable for opening or closing the through hole.

[0007] The through holes are arranged axially along the conveying pipe, so that the high-pressure water flow entering the water conveying pipe can enter the inside of the screw conveyor in all directions through the through holes, so that the purpose of high-pressure water dispersing sludge is achieved; and the through holes are uniformly distributed, so that the high-pressure water can uniformly impact the inside of the screw conveyor of the shield machine.

[0008] When the conveyor is in a non-working state, the adjusting structure is closed under the action of the automatic control device, so that the sludge in the inside of the screw conveyor cannot enter the water conveying pipe through the through holes when the screw conveyor is in a normal working state; when the screw conveyor is pre-blocked (the pre-blocked herein refers to that the automatic control device detects that the rotating speed of the screw is reduced to a certain value, and the pre-blocked is not a real blockage, the same below), the automatic control device controls the adjusting structure to open, so that the through holes are opened, and the high-pressure water flow disperses the pre-blocked sludge through the through holes arranged on the conveying pipe of the screw conveyor, so that the construction can be carried out normally; when the screw conveyor is in a normal working state, the adjusting structure of the conveying pipe of the screw conveyor of the shield machine is started to close the through holes, so that the sludge in the screw conveyor cannot enter the water conveying pipe.

[0009] A further technical scheme of the present application is that the adjusting structure comprises an electromagnet and a rotating part magnetically connected with the electromagnet, the electromagnet is fixed on one side of the cavity and arranged on one side of the through hole, the rotating part is arranged on the other side of the cavity and can be moved to be magnetically connected with the electromagnet, and the rotating part can move along the cavity to open and close the through hole.

[0010] When the rotating part moves along the cavity to the electromagnet, the through hole is blocked and closed, so that the sludge in the conveyor cannot enter the water conveying pipe, and the water conveying pipe is ensured to be unblocked.

[0011] A further technical scheme of the present application is that the rotating part comprises a rotatable part and a fixed part, an opening extending inwardly is arranged at one end of the rotatable part away from the electromagnet, the fixed part is fixed in the cavity and matched with the opening, and the fixed part and the bottom of the opening are connected through a first spring.

[0012] Under the action of the first spring, the rotatable part of the rotating part returns to the original position when the electromagnet is not powered.

[0013] A further technical scheme of the present application is that the fixed part is T-shaped, and one end of the fixed part away from the opening is connected with the rotatable part through a second spring.

[0014] Through the cooperation of the second spring, the pulling force of the rotating part for resetting is further increased.

[0015] The electromagnetic body is electrically connected with an automatic control device, and the automatic control device is used for controlling whether the electromagnetic body is electrified according to the rotating speed of the propeller.

[0016] The automatic control device is used for detecting that the rotating speed of the screw conveyor is reduced to a certain degree, controlling the adjusting structure to make the through hole in the open state, and then starting the high-pressure water flow into the water pipeline.

[0017] When the screw conveyor of the shield machine is in the normal working state, the through hole arranged on the conveying pipe of the screw conveyor of the shield machine is in the closed state, at this time, the automatic control device can control the electromagnetic body arranged in the conveying pipe of the screw conveyor of the shield machine to be electrified, at this time, the rotating part is attracted under the magnetic action of the electromagnetic body, so that the rotating part moves to the position of the through hole along the cavity, the rotating part covers the through hole, the effect of closing the through hole is realized, and the whole conveying pipe of the screw conveyor of the shield machine is in a fully closed state, so that when the screw conveyor of the shield machine is normally working, the earth material cannot enter the high-pressure water pipeline through the through hole, and the water pipeline cannot be blocked; on the contrary, the automatic control device controls the electromagnetic body to be de-energized, the magnetic force disappears, the rotating part closing the through hole returns to the original position, the through hole is exposed, the opening of the through hole is realized, and then the high-pressure water flow enters the water pipeline, the muck in the conveyor is scattered, and the conveyor can normally work.

[0018] The water pipeline is connected with a high-pressure water pipe at the top, and a rubber gasket is arranged at the connecting position.

[0019] A rubber gasket is arranged at the bolt connection position of the external high-pressure water pipe and the water pipeline, so as to prevent water leakage, ensure that the water flow of the high-pressure water pipe can maintain the original pressure after entering the water pipeline, and then can work well.

[0020] The automatic control device is arranged on the high-pressure water pipe.

[0021] The automatic control device can also be arranged at other positions, such as being arranged on the conveying pipe. As long as the function of the automatic control device can be realized, the specific position is not limited.

[0022] The water pipeline is connected with the high-pressure water pipe through bolt fixing.

[0023] The top end of the water pipeline on the conveying pipe of the screw conveyor is connected with the external high-pressure water pipe, and the external high-pressure water pipe is fixed through bolt connection, so as to ensure that the high-pressure water flow can smoothly enter the water pipeline.

[0024] The water pipelines are distributed at equal intervals on the outer periphery of the conveying pipe.

[0025] The high-pressure water can wash away the pre-blocked sludge in the screw conveyor from different angles, so that the screw conveyor can work normally.

[0026] A further technical solution of the present application is that the water conveying pipes are three, and adjacent water conveying pipes are distributed at an angle of 120 degrees.

[0027] The high-pressure water can wash away the pre-blocked sludge in the screw conveyor from different angles.

[0028] The present application has the following advantages: when the screw conveyor is pre-blocked, the automatic control device controls the opening of the adjusting structure, so that the through hole is opened, and the high-pressure water flow passes through the through hole arranged on the conveying pipe inside the screw conveyor water conveying pipe to wash away the pre-blocked sludge, so that the screw conveyor of the shield machine can work normally, to ensure that the shield machine can work normally, avoid delay of construction due to blockage of the screw conveyor of the shield machine, and improve construction efficiency; when the screw conveyor works normally, the adjusting structure of the screw conveyor conveying pipe of the shield machine is started to close the through hole, to prevent the sludge in the screw conveyor from entering the water conveying pipe.

[0029] The method can wash away the pre-blocked sludge inside the screw conveyor by high-pressure water flow before the screw conveyor of the shield machine is seriously blocked, so that the sludge can flow out through the front pipe opening under the action of the high-pressure water flow, and the screw conveyor can work stably. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a schematic view of the external structure of the conveying pipe of the screw conveyor of the present application.

[0031] Figure 2 It is a sectional view of the water conveying pipe of the screw conveyor of the present application.

[0032] Figure 3 It is a schematic view of the local connection between the water conveying pipe and the high-pressure water pipe of the present application.

[0033] Figure 4 It is a schematic view of the internal structure of the screw conveyor of the present application.

[0034] Figure 5 It is a schematic view of the external high-pressure water pipe of the present application.

[0035] Figure 6 It is a top view of the conveying pipe of the screw conveyor of the shield machine of the present application.

[0036] Figure 7 It is a schematic view of the structure when the through hole is opened.

[0037] Figure 8 It is a schematic view of the structure of the rotating part of the present application.

[0038] Reference numerals: 2. through hole, 3. high-pressure water pipe, 4. water delivery pipe, 5. delivery pipe, 6. propeller, 7. main shaft, 8. rubber gasket, 9. automatic control device, 10. cavity, 13. rotating part, 14. electromagnet, 15. rotatable part, 16. fixed part, 17. first spring, 18. second spring. DETAILED DESCRIPTION

[0039] Other advantages and effects of the present application can be easily understood by those skilled in the art from the above description. The present application can also be implemented or applied in other different embodiments, and various modifications or changes can be made to the details in the specification based on different views and applications without departing from the spirit of the present application.

[0040] It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to the specification are only used to cooperate with the content disclosed in the specification for understanding and reading by those skilled in the art, and do not define the limiting conditions for implementing the present application, so they do not have technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technology disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the specification are only for the convenience of clear description, and are not used to limit the scope of the present application. The change or adjustment of the relative relationship without substantially changing the technical content is also considered as the scope of the present application.

[0041] Example one:

[0042] The present application discloses a kind of anti-jamming screw conveyer for contact channel earth pressure balance shield machine, to prevent the jamming problem of shield machine screw conveyer in working process because of various reasons, the present application mainly is by introducing high-pressure flow, through the through hole set on shield machine delivery pipe enters the inside of shield machine screw conveyer, utilize high-pressure flow to disperse pre-jamming muck, to make it can work normally.

[0043] The invention relates to a kind of anti-jamming screw conveyer in liaison channel earth pressure balance shield machine, including conveying pipe 5 and propeller 6 being placed in the conveying pipe 5 and fixed on main shaft 7, the screw conveyer further includes water pipe 4 and adjusting structure, the water pipe 4 is placed outside the conveying pipe 5 and extends along the axial direction of the conveying pipe 5, the water pipe 4 is communicated with the inside of the conveying pipe 5 by the through hole 2 on the conveying pipe 5, the conveying pipe 5 is provided with cavity 10 along the axial direction, the adjusting structure is placed in the cavity 10, the adjusting structure is electrically connected with automatic control device 9 and the adjusting structure can be opened and closed to open or close the through hole 2.

[0044] In the embodiment, as shown in Figure 1 The water pipe 4 outside the conveying pipe 5 of the screw conveyer is connected with high-pressure water pipe 3. The water pipe 4 outside the conveying pipe of the screw conveyer is fixedly connected with the external high-pressure water pipe by bolts. The water pipe 4 is arranged along the axial direction of the conveying pipe of the screw conveyer. The function of the automatic control device is that when the device detects that the rotating speed of the screw conveyer decreases to a certain extent and then the jamming is likely to occur, the adjusting structure in the conveying pipe is first opened to expose the through hole, and then the high-pressure water flow is started to enter the inside of the screw conveyer.

[0045] In the embodiment, as shown in Figure 2 The figure is a sectional view of the water pipe, which shows the internal structure of the water pipe on the conveying pipe. As can be seen from the figure, a series of through holes 2 are arranged on the conveying pipe. The purpose of arranging the through holes is to enable the water in the water pipe 4 on the conveying pipe to enter the inside of the screw conveyer of the shield machine, so as to impact the pre-jamming muck in the inside of the screw conveyer of the shield machine. The through holes 2 are uniformly distributed along a certain distance. In order to enable the high-pressure water flow in the water pipe 4 on the conveying pipe to pass to different positions in the screw conveyer of the shield machine, so as to quickly dredge the pre-jamming muck in the screw conveyer. In the embodiment, there are three water pipes on the conveying pipe of the screw conveyer of the shield machine, and the three water pipes are distributed at an angle of 120°. The high-pressure water flow in the water pipes can enter the inside of the screw conveyer of the shield machine from different directions, so as to better remove the pre-jamming muck.

[0046] In the embodiment, Figure 4 It is a schematic view of the inside of the screw conveyer of the shield machine. The screw can convey muck when the propeller is used for work. The main shaft 7 is used for supporting.

[0047] In the embodiment, as shown in Figure 3As shown in the figure, the figure is a schematic diagram of the local connection of the water delivery pipe and the external high-pressure water pipe. The water delivery pipe and the external high-pressure water pipe are connected by bolts to ensure that when the external high-pressure water enters the water delivery pipe on the screw conveyor delivery pipe, the external water pipe will not fall off under the strong reaction force of the high-pressure water. In addition, rubber pads 8 are arranged at the connection to ensure that the high-pressure water flow will not leak to cause pressure drop and water leakage phenomenon, avoiding affecting the normal work.

[0048] In this embodiment, the screw conveyor delivery pipe of the shield machine is provided with a through hole 2. Figure 5 As shown in the figure, the figure is a schematic diagram of the local connection of the water delivery pipe and the external high-pressure water pipe. The water delivery pipe and the external high-pressure water pipe are connected by bolts to ensure that when the external high-pressure water enters the water delivery pipe on the screw conveyor delivery pipe, the external water pipe will not fall off under the strong reaction force of the high-pressure water. In addition, rubber pads 8 are arranged at the connection to ensure that the high-pressure water flow will not leak to cause pressure drop and water leakage phenomenon, avoiding affecting the normal work.

[0049] In this embodiment, the screw conveyor delivery pipe of the shield machine is provided with a through hole 2. Figure 6 As shown in the figure, the figure is a schematic diagram of the local connection of the water delivery pipe and the external high-pressure water pipe. The water delivery pipe and the external high-pressure water pipe are connected by bolts to ensure that when the external high-pressure water enters the water delivery pipe on the screw conveyor delivery pipe, the external water pipe will not fall off under the strong reaction force of the high-pressure water. In addition, rubber pads 8 are arranged at the connection to ensure that the high-pressure water flow will not leak to cause pressure drop and water leakage phenomenon, avoiding affecting the normal work.

[0050] In this embodiment, the screw conveyor delivery pipe of the shield machine is provided with a through hole 2. Figure 7 As shown in the figure, the figure is a schematic diagram of the local connection of the water delivery pipe and the external high-pressure water pipe. The water delivery pipe and the external high-pressure water pipe are connected by bolts to ensure that when the external high-pressure water enters the water delivery pipe on the screw conveyor delivery pipe, the external water pipe will not fall off under the strong reaction force of the high-pressure water. In addition, rubber pads 8 are arranged at the connection to ensure that the high-pressure water flow will not leak to cause pressure drop and water leakage phenomenon, avoiding affecting the normal work.

[0051] In this embodiment, the screw conveyor delivery pipe of the shield machine is provided with a through hole 2. When the shield machine screw conveyor is not blocked, the through hole on the delivery pipe is closed by the rotating part in the adjusting structure, so that the whole screw conveyor is in a closed state, to prevent the muck conveyed by the shield machine screw conveyor from entering the water delivery pipe inside the screw conveyor delivery pipe through the through hole arranged on the delivery pipe, causing the water delivery pipe to be blocked, which will affect the use of the application. Therefore, when the conveyor is not blocked, the through hole on the delivery pipe is closed by the rotating part in the adjusting structure, and the electromagnet 14 is energized to have strong magnetism, attracting the rotating part on the opposite side, and the rotating part 13 gradually rotates from one side of the through hole 2 until the through hole is closed and the whole delivery pipe is closed. When blocked, the water delivery function needs to be enabled, the electromagnet 14 is de-energized, the magnetic force disappears, the rotating part 13 rotates from the through hole to the original place, the through hole is exposed, and the whole device can work for water delivery.

[0052] In this embodiment, as Figure 8 As shown, the rotating component 13 of this invention includes a rotatable part 15 and a fixed part 16. The rotatable part 15 has an inwardly extending opening at its end away from the electromagnet 14. The fixed part 16, which mates with the opening, is fixed within the cavity 10. The fixed part 16 is connected to the bottom of the opening via a first spring 17. The fixed part 16 is T-shaped, and its end away from the opening is connected to the rotatable part 15 via a second spring 18. When it is necessary to close the intermediate through hole 2, the rotatable part 15 in the rotating component 13 rotates to close the through hole 2 under the action of magnetic force. When it is not necessary to close the through hole 2, the magnetic force disappears, and the rotatable part 15 in the rotating component 13 returns to its original position under the pulling force of the first spring 17 and the second spring 18, forming a whole with the fixed part 16.

[0053] The working principle of this invention is as follows: An automated control device 9 senses the rotational speed of the screw conveyor's internal screw shaft. When the automatic identification device detects that the screw shaft's speed has decreased to a certain level, it predicts that a blockage may occur inside the screw conveyor. At this time, it controls the activation of high-pressure water flow. Simultaneously, the automated control device 9 controls the adjustment structure to open the through-hole 2, allowing the high-pressure water entering the water supply pipe 4 to flow into the conveying pipe 5 along the through-hole 2. This impacts the pre-blocked soil, dispersing it and allowing it to be transported to the outside via the screw conveyor. This effectively prevents blockages in the tunnel boring machine's screw conveyor during operation due to the transport of excavated soil, thus ensuring the normal progress of construction. When the screw conveyor is operating normally, the adjustment structure closes the through-hole to prevent excavated soil from entering the water supply pipe. The automated control device enables automatic control, making operation simple and highly flexible.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. Anti-jamming screw conveyor for use in a communication gallery earth pressure balance shield machine, comprising a conveying pipe (5) and a screw propeller (6) placed inside the conveying pipe (5) and fixed to a main shaft (7), characterized in that: The screw conveyor further comprises a water conveying pipe (4) and an adjusting structure, the water conveying pipe (4) is arranged outside the conveying pipe (5) and extends along the axial direction of the conveying pipe (5), the water conveying pipe (4) is communicated with the inside of the conveying pipe (5) through a through hole (2) arranged on the conveying pipe (5), the conveying pipe (5) is provided with a cavity (10) along the axial direction, the adjusting structure is arranged in the cavity (10) and used for opening or closing the through hole (2), and the adjusting structure is electrically connected with an automatic control device (9); the adjusting structure comprises an electromagnet (14) and a rotating part (13) magnetically connected with the electromagnet (14), the electromagnet (14) is fixed on one side in the cavity (10) and arranged on one side of the through hole (2), the rotating part (13) is arranged on the other side in the cavity (10) and can be moved to be magnetically connected with the electromagnet (14), and the rotating part (13) can move along the cavity (10) to open or close the through hole (2); the rotating part (13) comprises a rotatable part (15) and a fixed part (16), one end of the rotatable part (15) away from the electromagnet (14) is provided with an inwardly extending opening, the cavity (10) is fixed with the fixed part (16) matched with the opening, and the fixed part (16) is connected with the bottom of the opening through a first spring (17); the fixed part (16) is T-shaped, and one end of the fixed part (16) away from the opening is connected with the rotatable part (15) through a second spring (18).

2. A clogging prevention screw conveyor for use in a soil pressure balanced tunneling shield machine according to claim 1, characterized in that, The electromagnet (14) is electrically connected with the automatic control device (9), and the automatic control device (9) is used for controlling whether the electromagnet (14) is powered on according to the rotating speed of the propeller (6).

3. A clogging prevention screw conveyor for use in a soil pressure balanced tunneling shield machine according to any one of claims 1-2, characterized in that, The water conveying pipe (4) is connected with a high-pressure water pipe (3) at the top and is provided with a rubber pad (8) at the connection position.

4. A clogging prevention screw conveyor for use in a soil pressure balanced tunneling shield according to claim 3, characterized in that, The automatic control device (9) is arranged on the high-pressure water pipe (3).

5. A clogging prevention screw conveyor for use in a soil pressure balanced tunneling shield according to claim 3, wherein The water conveying pipe (4) is fixedly connected with the high-pressure water pipe (3) through bolts.

6. A clogging prevention screw conveyor for use in a soil pressure balanced tunneling shield machine according to any one of claims 1 to 2, characterized in that, The water conveying pipes (4) are equidistantly distributed around the conveying pipe (5).

7. A clogging prevention screw conveyor for use in a soil pressure balanced tunneling shield according to claim 6, characterized in that, There are three water conveying pipes (4), and adjacent water conveying pipes (4) are distributed at an angle of 120°.

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