Shield mud circulating system and mud-water shield mud circulating auxiliary residue discharging device

Abstract

The application discloses a shield mud circulating system and a slurry shield mud circulating auxiliary residue discharging device, and relates to the technical field of machinery. The slurry shield mud circulating auxiliary residue discharging device comprises a detector for detecting the content of mud blocks in mud, a rotating shaft, blades for crushing the mud blocks, a driving device for driving the rotating shaft to rotate, a conveying pipe for conveying the mud, a shell arranged in the conveying pipe, and a control device. The rotating shaft is provided with at least two blades in the axial direction, and the rotating shaft is vertically arranged in the shell. The driving device is connected with the rotating shaft. The detector is arranged at the liquid inlet end of the conveying pipe. The detector and the driving device are both connected with the control device. By using the slurry shield mud circulating auxiliary residue discharging device, the mud blocks in the mud can be fully crushed, and the mud blocks can be prevented from adhering to the blades of the slurry pump. Meanwhile, the device can achieve the purpose of energy saving.

Description

TECHNICAL FIELD

[0001] The present application relates to the mechanical technical field, more particularly, to a slurry shield mud slurry circulation auxiliary discharging device. BACKGROUND

[0002] In the prior art, shield construction is more and more widely applied to tunnel engineering construction in various fields due to its safety and high efficiency, among which, the slurry shield machine is more and more applied in complex strata due to its advantages of accurate control of excavation chamber pressure. During tunneling, the slurry shield machine discharges the slurry in the excavation chamber through a slurry pump to complete the discharging work, but when the construction is carried out in clay strata, the mud blocks in the slurry often adhere to the blades of the slurry pump, which affects the construction efficiency of the slurry pump.

[0003] At present, the slurry circulation system generally sets a pair of mixers in the air cushion chamber to stir the slurry, but the rotating speed of the two mixers is limited, and there is a certain gap between the two mixers, which cannot completely process the mud blocks in the slurry. Moreover, the actuator of the mixer is installed in the air cushion chamber with a bad environment, and professional personnel need to enter the air cushion chamber under pressure for maintenance, which has a certain risk in the maintenance process.

[0004] In summary, how to fully break the mud blocks in the slurry, prevent the mud blocks from adhering to the blades of the slurry pump, and achieve the purpose of energy saving is a problem to be solved by the technical personnel in the field. SUMMARY

[0005] Therefore, the present application aims to provide a slurry shield mud slurry circulation auxiliary discharging device, which can fully break the mud blocks in the slurry, prevent the mud blocks from adhering to the blades of the slurry pump, and achieve the purpose of energy saving.

[0006] Another object of the present application is to provide a slurry shield mud slurry circulation system comprising the slurry shield mud slurry circulation auxiliary discharging device.

[0007] In order to achieve the above object, the present application provides the following technical scheme:

[0008] A slurry shield mud slurry circulation auxiliary discharging device, comprising: a detector for detecting the content of mud blocks in the slurry, a rotating shaft, blades for breaking the mud blocks, a driving device for driving the rotating shaft to rotate, a conveying pipe for conveying the slurry, a housing arranged in the conveying pipe, and a control device.

[0009] The rotating shaft is provided with at least two blades along the axial direction. The rotating shaft is vertically disposed inside the housing. The driving device is connected to the rotating shaft. The detector is disposed at the liquid inlet end of the delivery pipe. Both the detector and the driving device are connected to the control device.

[0010] Preferably, a first bearing is fitted onto the lower part of the rotating shaft, and a first seal is fitted onto the top and bottom of the first bearing to prevent impurities or mud from entering the first bearing.

[0011] Preferably, the bottom of the housing is provided with an end cap for axially limiting the first bearing, and the end cap is fitted and disposed below the first seal.

[0012] Preferably, a second bearing is fitted on the upper part of the rotating shaft, and a second seal is provided below the second bearing to prevent mud from entering the second bearing.

[0013] Preferably, the drive device is located at the top of the rotating shaft, and a spline sleeve is provided between the second bearing and the drive device.

[0014] Preferably, one side of the housing is provided with an openable and closable access door.

[0015] Preferably, the drive device includes a variable pump and a hydraulic motor, the variable pump is connected to the detector, the hydraulic motor is connected to the rotating shaft, and both the variable pump and the hydraulic motor are connected to the control device;

[0016] Alternatively, the drive device may be a variable frequency motor.

[0017] A shield tunneling slurry circulation system includes: a slurry pump and an auxiliary slag removal device for slurry circulation in a slurry shield tunneling system as described in any one of the above claims, wherein the slurry pump is located at the outlet end of the delivery pipe.

[0018] When using the slurry circulation-assisted muck removal device for slurry shield tunneling provided by this invention, the device can be installed outside the air cushion chamber and before the slurry pump. That is, when the tunneling machine is tunneling, the slurry from the excavation chamber needs to pass through this device into the slurry pump. When the detector detects a high content of mud lumps in the slurry, the control device can increase the power of the drive unit to increase the rotational speed of the rotating shaft, allowing the blades to break up the mud lumps in the slurry more promptly and efficiently, thereby preventing mud lumps from adhering to the slurry pump and improving the pump's working efficiency. When the detector detects a low content of mud lumps in the slurry, the control device can reduce the power of the drive unit to reduce the rotational speed of the rotating shaft, thereby ensuring the system's energy efficiency by reducing power output.

[0019] In summary, the slurry circulation-assisted muck removal device for slurry shield tunneling provided by this invention can effectively break up mud lumps in the slurry and prevent mud lumps from adhering to the blades of the slurry pump. At the same time, this device can achieve the purpose of energy saving.

[0020] In addition, the present invention also provides a shield slurry circulation system including the above-mentioned slurry circulation auxiliary muck removal device for shield tunneling. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the slurry circulation-assisted slag removal device for slurry shield tunneling provided by the present invention.

[0023] Figure 1 middle:

[0024] 1 is the detector, 2 is the rotating shaft, 3 is the blade, 4 is the drive device, 41 is the variable pump, 42 is the hydraulic motor, 5 is the delivery pipe, 6 is the housing, 7 is the first bearing, 8 is the first seal, 9 is the end cover, 10 is the second bearing, 11 is the second seal, 12 is the spline sleeve, 13 is the inspection door, 14 is the slurry pump, and 15 is the bolt. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] The core of this invention is to provide a slurry circulation-assisted muck removal device for slurry shield tunneling, which can effectively break up mud lumps in the slurry and prevent mud lumps from adhering to the blades of the slurry pump. Simultaneously, this device achieves energy saving. Another core aspect of this invention is to provide a shield tunneling slurry circulation system including the aforementioned slurry circulation-assisted muck removal device.

[0027] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the slurry circulation-assisted slag removal device for slurry shield tunneling provided by the present invention.

[0028] This specific embodiment provides a mud-water shield tunneling mud circulation auxiliary slag removal device, including: a detector 1 for detecting the mud content in the mud, a rotating shaft 2, blades 3 for breaking mud, a drive device 4 for driving the rotating shaft 2 to rotate, a conveying pipe 5 for conveying mud, a housing 6 disposed in the conveying pipe 5, and a control device; the rotating shaft 2 is provided with at least two blades 3 along the axial direction, the rotating shaft 2 is vertically disposed in the housing 6, the drive device 4 is connected to the rotating shaft 2, the detector 1 is disposed at the liquid inlet end of the conveying pipe 5, and both the detector 1 and the drive device 4 are connected to the control device.

[0029] It should be noted that blade 3 can be configured as a triangular star structure, such as... Figure 1 As shown, the arrows indicate the direction of mud flow. Furthermore, multiple blades 3 can be evenly spaced along the height of the inner cavity of the housing 6. By driving the rotating shaft 2 to rotate, the blades 3 are driven to rotate, thereby cutting and breaking up the mud blocks inside the housing 6. In practical applications, the shape, structure, and position of the detector 1, rotating shaft 2, blades 3, drive device 4, conveying pipe 5, housing 6, and control device can be determined according to actual conditions and needs.

[0030] When using the slurry circulation-assisted muck removal device for slurry shield tunneling provided by this invention, the device can be installed outside the air cushion chamber and before the slurry pump 14. That is, when the tunneling machine is tunneling, the slurry from the excavation chamber needs to pass through this device into the slurry pump 14. When the detector 1 detects a high content of mud lumps in the slurry, the control device can increase the power of the drive device 4 to increase the rotation speed of the rotating shaft 2, so that the blades 3 can break up the mud lumps in the slurry more promptly and efficiently, thereby preventing mud lumps from adhering to the slurry pump 14 and improving the working efficiency of the slurry pump 14; when the detector 1 detects a low content of mud lumps in the slurry, the control device can reduce the power of the drive device 4 to reduce the rotation speed of the rotating shaft 2, thereby ensuring the energy efficiency of the system by reducing the power output.

[0031] In summary, the slurry circulation-assisted slag removal device for slurry shield tunneling provided by the present invention can fully break up mud lumps in the slurry and prevent mud lumps from adhering to the blades 3 of the slurry pump 14. At the same time, the device can achieve the purpose of energy saving.

[0032] Based on the above embodiments, preferably, a first bearing 7 is sleeved on the lower part of the rotating shaft 2, and a first seal 8 is fitted on both the top and bottom of the first bearing 7 to prevent impurities or mud from entering the first bearing 7. The first bearing 7 effectively improves the rotation efficiency and service life of the rotating shaft 2. The first seal 8 located at the top of the first bearing 7 prevents mud from entering the first bearing 7, while the first seal 8 located at the bottom of the first bearing 7 prevents external impurities from entering the first bearing 7, thus effectively protecting the first bearing 7 and preventing damage.

[0033] Preferably, the bottom of the housing 6 is provided with an end cap 9 for axially limiting the first bearing 7, and the end cap 9 is fitted below the first seal 8. The end cap 9 can axially limit the first bearing 7 to prevent the first bearing 7 from moving or misaligning. Furthermore, the end cap 9 can be detachably fixed to the housing 6, that is, the end cap 9 can be installed on the housing 6 by bolts 15 to effectively limit the axial movement of the first bearing 7.

[0034] Based on the above embodiments, preferably, a second bearing 10 is sleeved on the upper part of the rotating shaft 2, and a second seal 11 is provided below the second bearing 10 to prevent mud from entering the second bearing 10. The function of the second bearing 10 is to provide good support for the rotation of the rotating shaft 2; the function of the second seal 11 is to prevent mud from the housing 6 from entering the second bearing 10, thereby avoiding damage to the second bearing 10.

[0035] Preferably, the drive device 4 is located at the top of the rotating shaft 2, and a spline sleeve 12 is provided between the second bearing 10 and the drive device 4. The function of the spline sleeve 12 is to transmit the torque and speed of the drive device 4 to the rotating shaft 2, so as to realize the rotation operation of the rotating shaft 2, and then drive the blade 3 to rotate to crush the mud blocks in the mud.

[0036] Preferably, one side of the housing 6 is provided with an openable and closable inspection door 13.

[0037] It should be noted that the end cap 9, first bearing 7, second bearing 10, first seal 8, second seal 11, and inspection door 13 can all be installed on the housing 6. The housing 6 serves as the base of the entire device, and the inspection door 13 facilitates maintenance and repair by operators. Furthermore, compared to traditional agitators, all components of this device operate under normal pressure, preventing operators from working under pressure during maintenance and improving their safety.

[0038] Preferably, the drive device 4 includes a variable pump 41 and a hydraulic motor 42. The variable pump 41 is connected to the detector 1, and the hydraulic motor 42 is connected to the rotating shaft 2. Both the variable pump 41 and the hydraulic motor 42 are connected to the control device; or the drive device 4 is a variable frequency motor.

[0039] It should be noted that the variable pump 41 drives the hydraulic motor 42 to rotate and adjusts its speed; the hydraulic motor 42 provides torque and speed to the rotating shaft 2. The hydraulic motor 42 drives the rotating shaft 2 with blades 3 to rotate at high speed, thereby breaking up the mud in the conveying pipe 5. Simultaneously, the detector 1 can detect the mud content in the mud pipe in real time and adjust the system flow rate through the variable pump 41, thereby changing the speed of the hydraulic motor 42 to effectively break up the mud. Then, the speed of the hydraulic motor 42 is changed again by detecting the mud content, effectively improving the energy efficiency of this device. Alternatively, a variable frequency motor can be used to drive the rotation instead of the variable pump 41 and hydraulic motor 42. The rotation can be directly driven by controlling the variable frequency motor, and the speed can be adjusted by changing the power frequency of the variable frequency motor.

[0040] In addition to the aforementioned slurry shield tunneling slurry circulation auxiliary muck removal device, this invention also provides a shield tunneling slurry circulation system including the slurry circulation auxiliary muck removal device disclosed in the above embodiments. This system includes: a slurry pump 14 and the slurry shield tunneling slurry circulation auxiliary muck removal device as described above, with the slurry pump 14 located at the outlet end of the delivery pipe 5. The structures of other parts of this shield tunneling slurry circulation system are described in the prior art and will not be repeated here.

[0041] It should be noted that the first bearing 7 and the second bearing 10, the first seal 8 and the second seal 11 mentioned in this application are only distinguished by their different positions and do not have any order of precedence.

[0042] In addition, it should be noted that the orientation or positional relationship indicated by "up and down" or "in and out" in this application is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the purpose of simplifying the description and making it easier to understand, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention.

[0043] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. Any combination of all embodiments provided by this invention is within the scope of protection of this invention and will not be elaborated upon here.

[0044] The shield tunneling slurry circulation system and its auxiliary slag removal device for slurry shield tunneling provided by the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A slurry shield mud circulating auxiliary residue discharging device, characterized in that, include: The instrument (1) for detecting the mud content in the mud slurry, the rotating shaft (2), the blades (3) for breaking up the mud slurry, the drive device (4) for driving the rotating shaft (2) to rotate, the conveying pipe (5) for conveying the mud slurry, the housing (6) provided in the conveying pipe (5), and the control device. The rotating shaft (2) is provided with at least two blades (3) along the axial direction. The rotating shaft (2) is vertically arranged inside the housing (6). The driving device (4) is connected to the rotating shaft (2). The detector (1) is located at the liquid inlet end of the delivery pipe (5). The detector (1) and the driving device (4) are both connected to the control device. The lower part of the rotating shaft (2) is fitted with a first bearing (7), and the top and bottom of the first bearing (7) are fitted with a first seal (8) to prevent impurities or mud from entering the first bearing (7); the upper part of the rotating shaft (2) is fitted with a second bearing (10), and the lower part of the second bearing (10) is fitted with a second seal (11) to prevent mud from entering the second bearing (10); the driving device (4) includes a variable pump (41) and a hydraulic motor (42), the variable pump (41) is connected to the detector (1), the hydraulic motor (42) is connected to the rotating shaft (2), and both the variable pump (41) and the hydraulic motor (42) are connected to the control device; or the driving device (4) is a variable frequency motor; When the detector (1) detects that there is a large amount of mud in the mud, the control device increases the power of the drive device (4) to increase the rotation speed of the rotating shaft (2) so that the blades (3) can break the mud in the mud more promptly and efficiently, thereby preventing the mud from adhering to the slurry pump and improving the working efficiency of the slurry pump; when the detector (1) detects that there is a small amount of mud in the mud, the control device reduces the power of the drive device (4) to reduce the rotation speed of the rotating shaft (2), thereby ensuring the energy efficiency of the system by reducing the power output.

2. The mud circulating auxiliary device for slurry shield according to claim 1, wherein, The bottom of the housing (6) is provided with an end cap (9) for axially limiting the first bearing (7), and the end cap (9) is attached to the bottom of the first seal (8).

3. The mud circulating auxiliary device for slurry shield according to claim 1, characterized in that, The drive device (4) is located on the top of the rotating shaft (2), and a spline sleeve (12) is provided between the second bearing (10) and the drive device (4).

4. The mud circulation assisted dewatering device for slurry shield according to any one of claims 1 to 3, characterized in that, The housing (6) is provided with an openable and closable inspection door (13) on one side.

5. A shield slurry circulation system, characterized by, include: The slurry pump (14) and the slurry circulation auxiliary slag removal device for slurry shield tunneling as described in any one of claims 1-4, wherein the slurry pump (14) is located at the liquid outlet end of the conveying pipe (5).

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