A silt removal device for shield construction

Abstract

The present invention discloses a sludge removal device for shield construction, including a shield machine, a shield cutter disc installed on one side of the shield machine, a plurality of mounting slots are provided on one side of the shield cutter disc, all the mounting slots are arranged in an array, the side walls of the mounting slots are provided with electric sliding doors, and all the mounting slots are provided with sludge freezing treatment devices, and the sludge freezing treatment devices are used to freeze the sludge to assist the shield cutter disc in cutting. The present invention freezes the sludge through the sludge freezing treatment device, so that the viscous sludge becomes hard, which is convenient for the shield cutter disc to cut, and avoids the sludge wrapping the shield cutter disc, causing the shield cutter disc to slip, and reducing the shield efficiency of the shield machine. At the same time, after the frozen sludge is cut, it is convenient for the shield machine soil bin to transport, and avoids the viscous sludge from entering the soil bin and sticking to the soil bin, which is difficult to transport and clean.

Description

Technical Field

[0001] The invention belongs to the field of shield construction, and in particular relates to a sludge removing device used for shield construction. Background Art

[0002] The shield tunnel boring machine is a special engineering machine for tunnel excavation. It has a cross-sectional shape that is the same as the cross-sectional shape of the tunnel, but slightly larger in size. It uses a rotary cutter to excavate, has a built-in earthmoving machine, and has a protective shell for tunnel excavation. The shield usually consists of four parts: the shield shell, the propulsion system, the assembly system, and the excavation system.

[0003] When encountering a silt layer during shield tunneling, the silt is thick and extremely sticky, which may wrap around the shield cutterhead, causing the cutterhead to slip and be unable to move forward. The cutterhead is forced to stop for repairs, slowing down the shield machine speed. At the same time, when the excavation system transports the silt, the silt is contaminated in the soil transportation channel and is difficult to clean, affecting the transportation efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a silt removal device for shield construction to solve the problem that when encountering a silt layer during shield construction, the silt is thick and has extremely strong viscosity, which may cause the silt to wrap around the shield cutter disc, causing the cutter disc to slip and be unable to move forward, and being forced to stop for repairs, thereby slowing down the shield speed. At the same time, when the excavation system transports the silt, the silt is contaminated in the soil transportation channel, making it difficult to clean and affecting the transportation efficiency.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A sludge removal device for shield construction comprises a shield machine, a shield cutter disc is installed on one side of the shield machine, a plurality of mounting slots are arranged on one side of the shield cutter disc, all the mounting slots are arranged in an array, electric sliding doors are provided on the side walls of the mounting slots, and sludge freezing treatment devices are provided in all the mounting slots, the sludge freezing treatment devices are used to freeze the sludge to assist the shield cutter disc in cutting.

[0007] Preferably, the sludge freezing treatment device includes a mounting plate, which is fixed to the side wall of the mounting groove, one side of the mounting plate is fixedly connected to the hydraulic cylinder, the telescopic rod of the hydraulic cylinder is fixedly connected to the cross plate, the cross plate is fixedly connected to the delivery pipe, one end of the delivery pipe is connected to the elastic hose, a nitrogen storage tank is arranged in the mounting groove, and the nitrogen storage tank is connected to the elastic hose.

[0008] Preferably, the delivery pipe and the elastic hose are both made of low-temperature resistant materials.

[0009] Preferably, one end of the conveying pipe is connected to the transverse pipe, a plurality of first air outlets are arranged on the surface of the transverse pipe, two vertical rods are fixedly connected to the surface of the conveying pipe, arc-shaped isolation plates are slidably connected to the two vertical rods, springs are fixedly connected between the two arc-shaped isolation plates and the transverse pipe, second air outlets are arranged on the two arc-shaped isolation plates, and a pushing device is arranged on the conveying pipe, which is used to push the two arc-shaped isolation plates to separate and clear the silt.

[0010] Preferably, the pushing device includes a shell, which is fixedly connected to the conveying pipe and communicated with the conveying pipe, the upper bottom surface of the inner cavity of the shell is rotatably connected to a rotating rod, a torsion spring is provided at the connection between the rotating rod and the shell, a control valve is provided on the conveying pipe, a sealing gasket is provided at the connection between the rotating rod and the shell, the rotating rod passes through the shell upward, the outer circle of the rotating rod is fixedly connected to the toggle plate, the outer circle of the rotating rod is fixedly connected to the gear, the gear is located above the shell, the upper surface of the shell is slidably connected to the rack, the rack is meshed with the gear, one end of the rack is fixedly connected to the support rod, the two arc-shaped isolation plates are provided with arc-shaped notches, the support rod passes through the two arc-shaped notches, one end of the support rod is fixedly connected to the arc-shaped protrusion, and the arc-shaped protrusion is located on the inner side of the two arc-shaped isolation plates.

[0011] Preferably, one side of the arc-shaped protrusion is fixedly connected to an arc-shaped baffle plate, and the arc-shaped baffle plate is used to prevent the arc-shaped protrusion from being separated from between two arc-shaped isolation plates.

[0012] Technical effects and advantages of the present invention: Compared with the prior art, the sludge removal device for shield construction proposed by the present invention has the following advantages:

[0013] 1. The present invention sets a sludge freezing treatment device, and the hydraulic cylinder pushes the cross plate and the conveying pipe to extend out of the installation groove, so that the conveying pipe is close to the sludge. Then, the liquid nitrogen is conveyed out by the nitrogen storage tank and sprayed on the sludge surface through the conveying pipe. After the liquid nitrogen is sprayed out, it instantly vaporizes and absorbs heat, so that the sludge is instantly frozen in a period of time. The reaction time is fast, the freezing speed is fast, and the frozen sludge loses its viscous characteristics and becomes hard and brittle. The shield cutter head cuts and crushes the frozen sludge. By using liquid nitrogen to freeze the sludge, the reaction time is fast, the freezing speed is fast, time is saved, and it is beneficial to increase the speed of the shield machine passing through the sludge layer.

[0014] 2. The present invention sets an arc-shaped isolation plate, and the conveying pipe pushes the transverse pipe into the sludge. Under the wrapping of the arc-shaped isolation plate, the sludge is isolated on the outside of the arc-shaped isolation plate to prevent the transverse pipe from being contaminated by the sludge. Then the pushing device pushes the two arc-shaped isolation plates in the upper and lower directions of the transverse pipe, so that the two arc-shaped isolation plates push the sludge upward and downward. At the same time, the nitrogen storage tank delivers nitrogen to quickly freeze the sludge around the transverse pipe. During freezing, the arc-shaped isolation plate is in the sludge to expand the sludge, so a groove A will appear on the surface of the sludge. By setting two arc-shaped isolation plates, the sludge is expanded and a groove is formed during freezing. When the shield cutter head is cutting, the groove is beneficial to increase the friction between the shield cutter head and the frozen surface of the sludge, which facilitates the shield cutting and avoids side slip.

[0015] 3. The present invention sets a pushing device. When the pulse nitrogen passes through the conveying pipe, the pulse nitrogen impacts the toggle plate to rotate, the torsion spring accumulates force, the toggle plate drives the rotating rod to rotate, the driving gear drives the rack to move, the rack pulls the arc-shaped protrusion to move, the arc-shaped protrusion pushes the two arc-shaped isolation plates away from each other, pushes the sludge, and the pulse nitrogen rushes out of the horizontal pipe to freeze the sludge. The impact force of the pulse nitrogen moves the arc-shaped isolation plate to push the sludge away. There is no need to set up a separate driving device, which saves the use cost and enables the arc-shaped isolation plate to efficiently cooperate with the timing of releasing nitrogen from the horizontal pipe to avoid the situation where the nitrogen has been released but the arc-shaped isolation plate has not yet moved the sludge. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 Figure 2 is a schematic diagram of the location of the installation slot.

[0018] Figure 3 It is a structural schematic diagram of the sludge freezing treatment device.

[0019] Figure 4 Schematic diagram of the structure of the arc isolation plate.

[0020] Figure 5 for Figure 4 Schematic diagram of the enlarged structure at point E in the middle.

[0021] Figure 6 It is a schematic diagram of the use status of the arc-shaped isolation plate and the arc-shaped protrusion.

[0022] Figure 7 Schematic diagram of the grooves on the surface of the sludge after freezing. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The present invention provides Figure 1-7 A sludge removal device for shield construction is shown, comprising a shield machine 1, a shield cutter head 11 is installed on one side of the shield machine 1, a plurality of mounting grooves 12 are provided on one side of the shield cutter head 11, all the mounting grooves 12 are arranged in an array, and electric sliding doors 13 are provided on the side walls of the mounting grooves 12. Silt freezing treatment devices 2 are provided in all the mounting grooves 12, and the sludge freezing treatment devices 2 are used to freeze the sludge to assist the shield cutter head 11 in cutting.

[0025] This device is used to treat the silt layer. This device is used in conjunction with a laser particle size analyzer. The laser particle size analyzer is a prior art and will not be described in detail here. The laser particle size analyzer analyzes soil quality through laser. The shield machine 1 cuts the tunnel through the shield cutter head 11. During the forward movement, when the laser particle size analyzer detects silt, the control center controls the shield machine 1 to stop. After that, all the electric sliding doors 13 open the installation slots 12. The electric sliding doors 13 are prior art and will not be described in detail here. The silt freezing treatment device 2 in the installation slot 13 freezes the silt in front of the shield machine 1 to harden the viscous silt, which is convenient for the shield cutter head 11 to cut, and avoids silt wrapping the shield cutter head 11, causing the shield cutter head 11 to slip, thereby reducing the shield efficiency of the shield machine 1;

[0026] At the same time, after the frozen sludge is cut, it is convenient to transport it to the soil bin of the shield machine 1, and it is prevented that the sticky sludge enters the soil bin and sticks to the soil bin, which makes it difficult to transport and clean.

[0027] The sludge freezing treatment device 2 includes a mounting plate 21, which is fixed to the side wall of the mounting groove 12. One side of the mounting plate 21 is fixedly connected to a hydraulic cylinder 22. The telescopic rod of the hydraulic cylinder 22 is fixedly connected to a transverse plate 23. The transverse plate 23 is fixedly connected to a delivery pipe 24. One end of the delivery pipe 24 is connected to an elastic hose 25. A nitrogen storage tank 26 is arranged in the mounting groove 12. The nitrogen storage tank 26 is connected to the elastic hose 25. Both the delivery pipe 24 and the elastic hose 25 are made of low-temperature resistant materials.

[0028] When the sludge freezing treatment device 2 freezes the sludge, the hydraulic cylinder 22 pushes the cross plate 23 and the delivery pipe 24 out of the installation groove 12, so that the delivery pipe 24 is close to the sludge, and then the nitrogen storage tank 26 delivers the liquid nitrogen, which is sprayed on the surface of the sludge through the delivery pipe 24. After the liquid nitrogen is sprayed out, it instantly vaporizes and absorbs heat, so that the sludge is instantly frozen in a period of time. The reaction time is fast and the freezing speed is fast. The frozen sludge loses its viscosity and becomes hard and brittle. After a period of time, the nitrogen storage tank 26 stops delivering, the hydraulic cylinder 22 retracts the delivery pipe 24, and the electric sliding door 13 closes the installation groove 12 to prevent the sludge blocks from entering the installation groove 12. Then the shield cutter head 11 cuts and crushes the frozen sludge;

[0029] Since liquid nitrogen can only freeze sludge of a certain thickness, when the shield cutter head 11 moves forward for a certain distance and stops, the sludge freezing treatment device 2 freezes it again, and the operation is repeated alternately until the shield machine 1 passes through the sludge layer. By using liquid nitrogen to freeze the sludge, the reaction time is fast, the freezing speed is fast, time is saved, and it is beneficial to increase the speed of the shield machine 1 passing through the sludge layer.

[0030] One end of the conveying pipe 24 is connected to the transverse pipe 3, and a plurality of first air outlets 31 are arranged on the surface of the transverse pipe 3. Two vertical rods 32 are fixedly connected to the surface of the conveying pipe 24, and arc-shaped isolation plates 33 are slidably connected to the two vertical rods 32. Springs 34 are fixedly connected between the two arc-shaped isolation plates 33 and the transverse pipe 3. Second air outlets 35 are arranged on the two arc-shaped isolation plates 33. A pushing device 4 is arranged on the conveying pipe 24, and the pushing device 4 is used to push the two arc-shaped isolation plates 33 to separate and clear the silt.

[0031] When the hydraulic cylinder 22 pushes the cross plate 23 and the delivery pipe 24 out of the installation groove 12, the delivery pipe 24 pushes the cross pipe 3 into the sludge. Under the wrapping of the arc isolation plate 33, the sludge is isolated on the outside of the arc isolation plate 33 to prevent the cross pipe 3 from being contaminated by the sludge. Then the pushing device 4 pushes the two arc isolation plates 33 in the upper and lower directions of the cross pipe 3, so that the two arc isolation plates 33 push the sludge upward and downward. At the same time, the nitrogen storage tank 26 delivers liquid nitrogen, and the nitrogen is blown out through the first air outlet 31, the second air outlet 35 and the gap between the two arc isolation plates 33 that are far away from each other, so as to quickly freeze the sludge around the cross pipe 3. Because the arc isolation plates 33 are in the sludge and prop up the sludge during freezing, the sludge surface will appear as follows. Figure 7 The groove A, after which the hydraulic cylinder 22 pulls the horizontal plate 23 and the arc-shaped isolation plate 33 away from the silt;

[0032] The depth of the transverse tube 3 inserted into the sludge should be less than the diameter of the cross section of the transverse tube 3. When the transverse tube 3 is inserted into the sludge too deeply, the sludge will wrap the arc-shaped isolation plate 33 before freezing. When the sludge is frozen, the hardened sludge will make it difficult to extract the transverse tube 3 and the arc-shaped isolation plate 33, which will affect the subsequent refreezing process.

[0033] By setting two arc-shaped isolation plates 33, the sludge is spread out and grooves are formed when it is frozen. When the shield cutter head 11 is cutting, the grooves are conducive to increasing the friction between the shield cutter head 11 and the frozen surface of the sludge, facilitating shield cutting and avoiding side slipping.

[0034] The pushing device 4 includes a shell 41, which is fixedly connected to the delivery pipe 24 and communicated with the delivery pipe 24. The upper bottom surface of the inner cavity of the shell 41 is rotatably connected to the rotating rod 42. A torsion spring is provided at the connection between the rotating rod 42 and the shell 41. A control valve is provided on the delivery pipe 24. A sealing gasket is provided at the connection between the rotating rod 42 and the shell 41. The rotating rod 42 passes through the shell 41 upward. The outer circle of the rotating rod 42 is fixedly connected to the toggle plate 43. The outer circle of the rotating rod 42 is fixedly connected to the gear 44. The gear 44 is located in the shell 41. Above, the upper surface of the shell 41 is slidably connected to a rack 45, which meshes with the gear 44. One end of the rack 45 is fixedly connected to a support rod 46. An arc-shaped notch is provided on the two arc-shaped isolation plates 33. The support rod 46 passes through the two arc-shaped notches. One end of the support rod 46 is fixedly connected to an arc-shaped protrusion 47. The arc-shaped protrusion 47 is located on the inner side of the two arc-shaped isolation plates 33. One side of the arc-shaped protrusion 47 is fixedly connected to an arc-shaped baffle 48. The arc-shaped baffle 48 is used to prevent the arc-shaped protrusion 47 from detaching from between the two arc-shaped isolation plates 33.

[0035] Compressed nitrogen is stored in the nitrogen storage tank 26, and the control valve is automatically opened at intervals, and the nitrogen rushes out at intervals to form pulse nitrogen, which enters the delivery pipe 24. A protective shell (not shown in the drawings) is arranged outside the rack 45 and the gear 44 to protect the gear rack;

[0036] The delivery pipe 24 pushes the horizontal pipe 3 into the sludge, the control valve is opened, and when the pulse nitrogen passes through the delivery pipe 24, the pulse nitrogen impacts the toggle plate 43 to rotate, the torsion spring stores force, the toggle plate 43 drives the rotating rod 42 to rotate, the driving gear 44 drives the rack 45 to move, the rack 45 pulls the arc-shaped protrusion 47 to move, the arc-shaped protrusion 47 pushes the two arc-shaped isolation plates 33 away from each other, pushes the sludge, and the pulse nitrogen rushes out of the horizontal pipe 3 to freeze the sludge. Figure 6 ;

[0037] When the pulse nitrogen impacts the toggle plate 43 to rotate, the arc-shaped isolation plates 33 move away from each other, and after pushing the sludge, the control valve is closed. Under the action of the toggle spring, the toggle plate 43, the rack 45 and the arc-shaped protrusion 47 are reset. At this time, the two arc-shaped isolation plates 33 are close to each other, and the conveying pipe 24 pulls the cross pipe 3 away from the sludge and returns to the installation groove 12, and the shield machine starts. The control valve is opened only when the sludge begins to be frozen, which effectively saves nitrogen. At the same time, the impact force of the pulse nitrogen is used to move the arc-shaped isolation plate 33 to push away the sludge. There is no need to set up a separate driving device, which saves the use cost, so that the arc-shaped isolation plate 33 can efficiently cooperate with the timing of releasing nitrogen from the cross pipe 3 to avoid the situation where the nitrogen has been released but the arc-shaped isolation plate 33 has not yet pushed the sludge.

[0038] When in use, when the laser particle size analyzer detects silt, the control center controls the shield machine 1 to stop moving forward, and then all the electric sliding doors 13 open the installation slot 12, and the hydraulic cylinder 22 pushes the cross plate 23 and the conveying pipe 24 out of the installation slot 12, so that the conveying pipe 24 pushes the cross pipe 3 into the silt, and the control valve is opened. When the pulse nitrogen passes through the conveying pipe 24, the pulse nitrogen impacts the toggle plate 43 to rotate, the torsion spring accumulates force, the toggle plate 43 drives the rotating rod 42 to rotate, the driving gear 44 drives the rack 45 to move, and the rack 45 pulls the arc convex Block 47 moves, and the arc-shaped protrusion 47 pushes the two arc-shaped isolation plates 33 away from each other, pushing the sludge, and the pulse nitrogen rushes out of the cross pipe 3 to freeze the sludge. The control valve is closed, and under the action of the torsion spring, the toggle plate 43, the rack 45 and the arc-shaped protrusion 47 are reset. At this time, the two arc-shaped isolation plates 33 are close, and the conveying pipe 24 pulls the cross pipe 3 away from the sludge and returns to the installation groove 12, and the shield starts. When the shield cutter head 11 moves forward for a distance, it stops and is frozen again by the sludge freezing treatment device 2. The operation is alternated in this way until the shield machine 1 passes through the sludge layer.

[0039] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0040] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sludge removal device for shield construction, comprising a shield machine (1), a shield cutterhead (11) being installed on one side of the shield machine (1), characterized in that: A plurality of mounting grooves (12) are provided on one side of the shield cutter head (11), and all the mounting grooves (12) are arranged in an array. The side walls of the mounting grooves (12) are provided with electric sliding doors (13). A sludge freezing treatment device (2) is provided in all the mounting grooves (12), and the sludge freezing treatment device (2) is used to freeze the sludge to assist the shield cutter head (11) in cutting; the sludge freezing treatment device (2) comprises a mounting plate (21), the mounting plate (21) is fixed to the side wall of the mounting groove (12), one side of the mounting plate (21) is fixedly connected to a hydraulic cylinder (22), a telescopic rod of the hydraulic cylinder (22) is fixedly connected to a transverse plate (23), a delivery pipe (24) is fixedly connected to the transverse plate (23), one end of the delivery pipe (24) is connected to an elastic hose (25), a nitrogen storage tank (26) is provided in the mounting groove (12), and the nitrogen storage tank (26) is connected to the elastic hose (25); The delivery pipe (24) and the elastic hose (25) are both made of low-temperature resistant materials; One end of the delivery pipe (24) is connected to the transverse pipe (3), and a plurality of first air outlet holes (31) are arranged on the surface of the transverse pipe (3). Two vertical rods (32) are fixedly connected to the surface of the delivery pipe (24), and arc-shaped isolation plates (33) are slidably connected to the two vertical rods (32). Springs (34) are fixedly connected between the two arc-shaped isolation plates (33) and the transverse pipe (3). Second air outlet holes (35) are arranged on the two arc-shaped isolation plates (33), and a pushing device (4) is arranged on the delivery pipe (24), and the pushing device (4) is used to push the two arc-shaped isolation plates (33) to separate and clear the sludge.

2. A sludge removal device for shield construction according to claim 1, characterized in that: The pushing device (4) comprises a shell (41), the shell (41) is fixedly connected to the delivery pipe (24) and communicated with the delivery pipe (24), the upper bottom surface of the inner cavity of the shell (41) is rotatably connected to a rotating rod (42), a torsion spring is provided at the connection between the rotating rod (42) and the shell (41), a control valve is provided on the delivery pipe (24), a sealing gasket is provided at the connection between the rotating rod (42) and the shell (41), the rotating rod (42) penetrates the shell (41) upwards, and the outer circle of the rotating rod (42) is fixedly connected to a toggle plate (43), The outer circle of the rotating rod (42) is fixedly connected to a gear (44), the gear (44) is located above the housing (41), the upper surface of the housing (41) is slidably connected to a rack (45), the rack (45) is meshed with the gear (44), one end of the rack (45) is fixedly connected to a support rod (46), two arc-shaped isolation plates (33) are provided with arc-shaped notches, the support rod (46) passes through the two arc-shaped notches, one end of the support rod (46) is fixedly connected to an arc-shaped protrusion (47), and the arc-shaped protrusion (47) is located on the inner side of the two arc-shaped isolation plates (33).

3. A sludge removal device for shield construction according to claim 2, characterized in that: One side of the arc-shaped protrusion (47) is fixedly connected to an arc-shaped baffle plate (48), and the arc-shaped baffle plate (48) is used to prevent the arc-shaped protrusion (47) from being separated from between the two arc-shaped isolation plates (33).

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