Mortar conveying system for subway shield construction

Abstract

The utility model relates to the technical field of shield construction, in particular to a mortar conveying system for subway shield construction, which comprises a blanking box, a mortar storage tank and a blanking pipe. The blanking box is mounted at the mouth of the vertical shaft; the slurry storage tank is mounted on a shaft bottom platform of the vertical shaft; a discharging pipe is arranged at the bottom of the slurry storage tank, and stirring blades are arranged in the slurry storage tank; the two ends of the discharging pipe are communicated with the discharging box and the slurry storage tank respectively. The finished mortar is directly conveyed into the mortar storage tank from the wellhead through the discharging box and the discharging pipe. Compared with a traditional scheme, the middle link of material hoisting is omitted, the construction efficiency is effectively improved, and meanwhile the cost generated by hoisting operation is reduced.

Description

Technical Field

[0001] This utility model relates to the field of tunnel boring machine (TBM) construction technology, and in particular to a mortar conveying system for subway TBM construction. Background Technology

[0002] In the field of subway tunnel boring machine (TBM) construction, the continuous delivery of mortar is a crucial link in ensuring the smooth progress of the project. As a core material for tunnel construction safety and quality, mortar mainly undertakes multiple functions, including sealing the joints after the TBM segments are assembled, reinforcing the gaps behind the tunnel walls, preventing water seepage, and providing overall structural stability support. In traditional construction processes, finished mortar needs to be transported in batches to the underground via a vertical shaft connected to the ground using hoisting equipment, and then transported a second time to the TBM construction location. The current method suffers from low efficiency and high cost in the material handling process, necessitating the development of a new mortar delivery solution. Utility Model Content

[0003] The purpose of this invention is to overcome the problems of low efficiency and high cost in the material hoisting process when delivering mortar for subway tunnel construction, and to provide a mortar delivery system for subway tunnel construction.

[0004] This utility model provides a mortar conveying system for subway tunnel construction, comprising:

[0005] A feeding box is installed at the opening of the vertical shaft;

[0006] A slurry storage tank is installed on the bottom platform of the vertical shaft; the bottom of the slurry storage tank is provided with a discharge pipe, and the inside of the slurry storage tank is provided with stirring blades;

[0007] The feed pipe has two ends connected to the feed box and the slurry storage tank, respectively.

[0008] This utility model provides a mortar conveying system for subway tunnel boring machine (TBM) construction. The unloading hopper receives finished mortar and is installed at the shaft opening, allowing mortar trucks to directly feed the finished mortar into it. The storage tank serves as a temporary storage container for the finished mortar. The stirring blades inside the storage tank continuously agitate the mortar, preventing segregation. The discharge pipe transports the finished mortar received from the unloading hopper to the storage tank. The discharge pipe discharges the finished mortar stored in the storage tank for subsequent TBM segment construction.

[0009] This invention directly transports the finished mortar from the wellhead to the storage tank via the feeding box and the feeding pipe. Compared to traditional methods, this application eliminates the intermediate step of material hoisting, effectively improving construction efficiency and reducing the cost of hoisting operations.

[0010] Preferably, the feeding box includes a box body and a funnel, the funnel is located below the box body, the bottom of the funnel is connected to the feeding pipe, the top of the box body is provided with a feeding port, the feeding port is higher than the opening of the vertical shaft, and the feeding port faces the outside of the vertical shaft.

[0011] In this design, the main function of the inlet is to serve as a channel for mortar raw materials to enter the discharge box. The inlet is higher than the opening of the shaft and faces outwards from the shaft. This design facilitates the connection between the mortar truck's outlet and the inlet, ensuring that the finished mortar can flow smoothly into the inlet. The box body serves to contain the finished mortar, providing temporary storage space. As the finished mortar descends from the box body into the funnel, the funnel allows the mortar to gradually gather together and ultimately be smoothly transported into the discharge pipe.

[0012] Preferably, a filter screen is provided between the box and the funnel, and an openable cover is provided at the feed inlet. In this design, the filter screen can effectively intercept large debris in the finished mortar, preventing these debris from entering the discharge pipe, thus avoiding blockage of the discharge pipe or damage to the equipment inside the storage tank, ensuring smooth material transport. The cover has a dual function. On the one hand, when the cover is closed, it can tightly seal the feed inlet, preventing rainwater from entering the box and avoiding affecting the quality and subsequent use of the finished mortar. On the other hand, the cover can also prevent material from escaping from the feed inlet, reducing material waste and maintaining a clean working environment.

[0013] Preferably, the filter screen has a pore size of 10mm-20mm.

[0014] Preferably, a vibrator is provided on the outer wall of the box. When the vibrator is running, it generates vibration, causing the feeding box to shake rhythmically. This shaking loosens and displaces the finished mortar inside the feeding box, thereby assisting the finished mortar to gradually and smoothly enter the feeding pipe, effectively improving the conveying efficiency of the finished mortar.

[0015] Preferably, the stirring blades are connected to a drive device, which is mounted on the top of the slurry storage tank. In this configuration, the drive device is used to drive the stirring blades to rotate.

[0016] Preferably, the top of the slurry storage tank has an opening, a protective net is installed at the opening, and a fence is installed along the top edge of the tank. In this design, the opening facilitates observation of the mixing status of the mortar inside the tank. The protective net provides dual protection: firstly, it effectively ensures personnel safety, preventing accidental falls into the tank; secondly, it prevents external debris from falling into the tank, thus ensuring the quality of the mortar. The fence provides protection, preventing personnel from accidentally falling from the top of the tank to the ground.

[0017] Preferably, the system also includes a material transport vehicle capable of receiving the mortar flowing from the discharge pipe and transporting it to the tunnel boring machine (TBM) construction area. In this embodiment, the material transport vehicle is used to receive the mortar flowing from the discharge pipe and transport it to the TBM construction area.

[0018] Preferably, the feeding box is mounted on the wellhead platform on the inner wall of the shaft via a bracket. The bracket serves to support and secure the feeding box.

[0019] Preferably, the bottom surface of the slurry storage tank is inclined towards the discharge pipe. In this design, the mortar at the bottom of the slurry storage tank can flow smoothly and naturally towards the discharge pipe due to the inclination angle of the bottom surface, effectively reducing the amount of mortar residue at the bottom of the slurry storage tank, thereby improving the utilization rate of mortar and reducing mortar waste.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] This invention provides a mortar conveying system for subway tunnel boring machine (TBM) construction, which directly conveys the finished mortar from the wellhead to the storage tank via a feeding box and a feeding pipe. Compared to traditional solutions, this application eliminates the intermediate step of material hoisting, effectively improving construction efficiency and reducing the cost of hoisting operations. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a mortar delivery system used in subway tunnel construction.

[0023] Figure 2 This is a top view of the feeding box.

[0024] Marked in the image:

[0025] 1-Feeding box,

[0026] 101-Box body, 102-Function funnel, 103-Feed inlet, 104-Cover plate, 105-Filter screen, 106-Vibrator

[0027] 2-Staff

[0028] 3-Feed pipe,

[0029] 4-Slurry storage tank,

[0030] 401 - Discharge pipe, 402 - Agitator blades, 403 - Drive unit, 404 - Protective netting

[0031] 5. Material transport vehicle

[0032] 6-Shaft body,

[0033] 7-Wellhead Platform

[0034] 8- Bottom platform. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0036] Unless otherwise specified, the terms "upper," "lower," "left," "right," "center," "inner," and "outer" used in the description of specific embodiments of this utility model to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is usually placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, and for enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0037] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are arranged as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when arranged in "horizontal," "vertical," "suspended," "parallel," or "coaxial" directions, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0038] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0039] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0040] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0041] Example 1

[0042] like Figures 1 to 2 As shown, a mortar conveying system for subway tunnel construction includes a material feeding box 1, a mortar storage tank 4, a material feeding pipe 3, and a material transport vehicle 5.

[0043] The feeding box 1 is installed at the opening of the vertical shaft. Figure 1 The image shows the shaft body 6, with the left side of shaft body 6 being the outer side of the shaft and the right side of shaft body 6 being the inner side of the shaft.

[0044] The slurry storage tank 4 is installed on the bottom platform 8 of the vertical shaft; the bottom of the slurry storage tank 4 is provided with a discharge pipe 401, and the inside of the slurry storage tank 4 is provided with stirring blades 402.

[0045] The two ends of the feeding pipe 3 are connected to the feeding box 1 and the slurry storage tank 4, respectively. Specifically, the feeding pipe 3 can be a corrugated pipe or a PVC plastic pipe. The diameter of the feeding pipe 3 can be 20cm-30cm, specifically 20cm, 25cm, or 30cm.

[0046] In an optional embodiment, the feeding box 1 may include a box body 101 and a funnel 102. The funnel 102 is located below the box body 101, and its bottom is connected to the feeding pipe 3. The top of the box body 101 is provided with a feeding inlet 103, which is higher than the opening of the vertical shaft and faces outward from the vertical shaft. Specifically, both the box body 101 and the funnel 102 are made of steel plates with a thickness of 3mm-6mm. The dimensions of the box body 101 can be 80cm × 80cm × 70cm. The top surface of the funnel 102 can be 80cm × 80cm, the bottom surface can be 40cm × 40cm, and the height of the funnel 102 can be 30cm-40cm. The feeding inlet 103 is 20cm-30cm higher than the opening of the vertical shaft.

[0047] In an optional embodiment, a filter screen 105 may be provided between the housing 101 and the funnel 102, and an openable cover plate 104 may be provided at the feed inlet 103. Specifically, the filter screen 105 is made of wire mesh. The cover plate 104 is also made of steel plate with a thickness of 3mm-6mm.

[0048] In an optional embodiment, the pore size of the filter screen 105 can be 10mm-20mm, specifically 10mm, 12mm, 15mm, 18mm, or 20mm.

[0049] In an optional embodiment, a vibrator 106 may be provided on the outer wall of the housing 101. Specifically, the vibrator 106 is located on the side facing the inside of the shaft. The vibrator 106 includes a motor and an irregularly shaped counterweight, which is mounted on the motor's shaft. When the motor drives the counterweight to rotate, the centrifugal force generated by the counterweight continuously changes in direction and magnitude due to the shift in the center of gravity. This periodically changing centrifugal force is transmitted to the housing of the vibrator 106, forming continuous mechanical vibration.

[0050] In an optional embodiment, the stirring blade 402 may be connected to a drive device 403, which is installed on the top of the slurry tank 4. Specifically, the drive device 403 is a motor, the shaft of the stirring blade 402 is vertically installed, and the top of the shaft is connected to the drive device 403.

[0051] In an optional embodiment, the top of the slurry storage tank 4 may be provided with an opening, and a protective net 404 may be provided at the opening. A fence may be provided along the top edge of the slurry storage tank 4. Specifically, the protective net 404 is made of wire mesh with a mesh size ranging from 30mm to 40mm. A keel is installed at the bottom of the protective net 404, which is connected to the top of the slurry storage tank 4 to support the protective net 404. The fence is made of galvanized steel pipe, and its bottom is welded to the keel.

[0052] In an optional embodiment, a material transport vehicle 5 may also be included, which can receive the mortar flowing out of the discharge pipe 401 and transport it to the shield tunneling construction area. Specifically, the material transport vehicle 5 can be a hand-pushed wheelbarrow or an electric trolley.

[0053] In an optional embodiment, the material feeding box 1 can be installed on the wellhead platform 7 on the inner wall of the shaft via a bracket 2. Specifically, the bracket 2 can be made of angle steel or I-beams, where the angle steel can be 40×40×3mm and the I-beams can be No. 10 I-beams. The bracket 2 is welded to the outer wall of the material feeding box 1. The top of the bracket 2 can be hooked onto the top structure of the shaft body 6. This design enhances the stability of the bracket 2 and effectively prevents it from tipping over or overturning.

[0054] In an optional embodiment, the bottom surface of the slurry storage tank 4 can be inclined toward the discharge pipe 401. Specifically, the inclination angle of the bottom surface of the slurry storage tank 4 can be 5°-20°, and the specific angle can be 5°, 10°, 15°, or 20°.

[0055] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mortar conveying system for subway tunnel boring machine construction, characterized in that, include: A feeding box (1) is installed at the opening of the vertical shaft; A slurry storage tank (4) is installed on the bottom platform (8) of the vertical shaft; a discharge pipe (401) is provided at the bottom of the slurry storage tank (4), and a stirring blade (402) is provided inside the slurry storage tank (4). The feeding pipe (3) is connected at both ends to the feeding box (1) and the slurry storage tank (4).

2. The mortar conveying system for subway tunnel boring machine construction according to claim 1, characterized in that, The feeding box (1) includes a box body (101) and a funnel (102). The funnel (102) is located below the box body (101). The bottom of the funnel (102) is connected to the feeding pipe (3). The top of the box body (101) is provided with a feeding port (103). The feeding port (103) is higher than the opening of the vertical shaft and faces the outside of the vertical shaft.

3. A mortar conveying system for subway tunnel boring machine construction according to claim 2, characterized in that, A filter screen (105) is provided between the box (101) and the funnel (102), and an openable cover plate (104) is provided at the feed inlet (103).

4. A mortar conveying system for subway tunnel boring machine construction according to claim 3, characterized in that, The filter screen (105) has a pore size of 10mm-20mm.

5. A mortar conveying system for subway tunnel boring machine construction according to claim 3, characterized in that, A vibrator (106) is provided on the outer wall of the housing (101).

6. A mortar conveying system for subway tunnel boring machine construction according to any one of claims 1-5, characterized in that, The stirring blade (402) is connected to a drive device (403), which is installed on the top of the slurry tank (4).

7. A mortar conveying system for subway tunnel boring machine construction according to claim 6, characterized in that, The top of the slurry storage tank (4) is provided with an opening, and a protective net (404) is provided at the opening position. The top edge of the slurry storage tank (4) is provided with a fence.

8. A mortar conveying system for subway tunnel boring machine construction according to claim 6, characterized in that, It also includes a material transport vehicle (5), which can receive the mortar flowing out from the discharge pipe (401) and transport it to the shield tunneling construction area.

9. A mortar conveying system for subway tunnel boring machine construction according to claim 6, characterized in that, The feeding box (1) is installed on the wellhead platform (7) on the inner wall of the vertical shaft via a bracket (2).

10. A mortar conveying system for subway tunnel boring machine construction according to claim 6, characterized in that, The bottom surface of the slurry storage tank (4) is inclined toward the discharge pipe (401).

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