Double-liquid synchronous grouting device for shield tunneling machine

Abstract

The utility model belongs to the technical field of shield tunneling machines, and particularly relates to a double-liquid synchronous grouting device for a shield tunneling machine. Comprising a grouting block, a mixing channel is formed in the grouting block, an A liquid channel located on one side of the mixing channel is formed in the grouting block, a B liquid channel located below the mixing channel is formed in the grouting block, an A liquid grouting assembly is fixedly connected to the end, away from the mixing channel, of the A liquid channel, and a backwashing assembly is slidably connected to the interior of the B liquid channel; and a B liquid grouting assembly is mounted in the backwashing assembly. By means of the synchronous double-liquid grouting device, two kinds of grouting liquid can be pumped into a pipeline on the rear portion of a tail shield through a pipeline pump to be mixed, the mixed grout is discharged out of the grouting pipeline and rapidly coagulates, annular gaps of pipe pieces are effectively filled in time, and construction faults caused by the fact that the annular gaps are not filled in time or insufficiently are avoided. And in addition, the pipeline can be flushed after grouting work is completed, and the situation that grout is hung on the wall is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of shield machines, and in particular relates to a double-liquid synchronous grouting device for a shield machine. Background Art

[0002] The shield machine grouting system is one of the key systems of the shield machine. Its main function is to fill the annular gap formed by the inner wall of the tunnel and the outer wall of the segment during the tunneling process of the shield machine. The grouting system is generally divided into a synchronous grouting system and a secondary grouting system. The synchronous grouting system is carried out synchronously with the tunneling of the shield machine, that is, the slurry is injected while the equipment is moving forward. The secondary grouting system is used for grouting when the synchronous grouting is insufficient or when local waterproofing and leakage prevention are required.

[0003] At present, the commonly used synchronous grouting system is generally single-liquid grouting, that is, the mortar mixed on the ground is transported to the tunnel, and the grouting pump arranged on the equipment trolley hydraulically delivers the slurry into the annular gap, thereby achieving the purpose of filling the annular gap. Since the early strength of the single-liquid slurry is low, it is easy to cause slurry dilution and loss in water-rich formations, and the grouting strength and quality cannot be guaranteed. The grouting volume is generally about 130%-180% of the annular gap volume, and even worse, it can reach 250%, and the grouting consumption is large; the low early strength of the slurry is easy to cause the pipe segment to float after escaping from the shield tail, resulting in the defect of deformation of the formed tunnel.

[0004] In view of this, in order to solve the above problems, the utility model designs a double-liquid synchronous grouting device for a shield machine. Utility Model Content

[0005] Purpose of the utility model: The purpose of the utility model is to provide a double-liquid synchronous grouting device for a shield machine in view of the deficiencies in the current technology.

[0006] Technical solution: To achieve the above-mentioned purpose, the utility model provides a dual-liquid synchronous grouting device for a shield machine, including a grouting block, a mixing channel is opened inside the grouting block, an A liquid channel is opened inside the grouting block and is located on one side of the mixing channel, a B liquid channel is opened inside the grouting block and is located below the mixing channel, an A liquid grouting assembly is fixedly connected to one end of the A liquid channel away from the mixing channel, a backwash assembly is slidably connected to the inside of the B liquid channel, and a B liquid grouting assembly is installed inside the backwash assembly.

[0007] Furthermore, the A-liquid grouting assembly includes an A-liquid grouting pipe fixedly connected to one end of the A-liquid channel away from the mixing channel, and a grouting ball valve is connected to the lower end of the A-liquid grouting pipe.

[0008] Furthermore, the backwash component includes a water pipe slidably connected to the mixing channel and the A liquid channel, the upper end of the water pipe is fixedly connected to a fixing seat with a through hole inside, the upper end of the fixing seat is threadedly connected to a mounting seat, a water outlet is provided on the water pipe, a backwash cylinder is provided at the lower end of the water pipe, and the lower end of the A liquid grouting pipe is connected to a backwash water ball valve.

[0009] Furthermore, the B liquid grouting assembly includes a B liquid valve seat in an annular shape fixedly installed on the upper end of the fixed seat, an annular recess is provided on the inner side of the upper surface of the B liquid valve seat, a B liquid valve core in a T-shape is placed on the annular recess, a guide gasket is fixedly connected to the outside of the B liquid valve core, an adjusting spring is sleeved on the outside of the B liquid valve core, the upper end of the adjusting spring is fixedly connected to the upper end of the fixed seat, and the lower end is fixedly connected to the guide gasket, a B liquid grouting pipe is fixedly connected to the inside of the water pipe, the upper end of the B liquid grouting pipe is fixedly connected to the lower end of the fixed seat, and a gap is left between the B liquid grouting pipe and the water pipe.

[0010] Furthermore, a first sealing ring is provided between the B liquid valve seat and the mounting seat.

[0011] Furthermore, the mounting seat and the outside of the water pipe are both sleeved with a second sealing ring.

[0012] Beneficial effects: The utility model uses a synchronous double-liquid grouting device to pump two grouting liquids through pipelines to the pipeline at the rear of the tail shield for mixing. The mixed slurry is discharged from the grouting pipeline and quickly condenses, filling the annular gap of the pipe segment in a timely and effective manner, avoiding construction failures caused by untimely or insufficient filling of the annular gap. In addition, the pipeline can be flushed after the grouting work is completed to reduce the occurrence of slurry hanging on the wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a cross-sectional view of the grouting process structure of the utility model;

[0014] Figure 2 This is a structural diagram of the B liquid grouting component of the utility model;

[0015] Figure 3 This is an enlarged view of point A of the utility model;

[0016] Figure 4 This is a cross-sectional view of the backwashing process structure of the utility model.

[0017] List of figure marks: A liquid grouting assembly 1, A liquid grouting pipe 11, grouting ball valve 12, backwashing water ball valve 13, B liquid grouting assembly 2, B liquid grouting pipe 21, B liquid valve core 22, B liquid valve seat 23, adjusting spring 24, guide gasket 25, first sealing ring 26, annular recess 27, backwashing assembly 3, water pipe 31, mounting seat 32, second sealing ring 33, backwashing cylinder 34, fixing seat 35, water outlet 36, grouting block 4, mixing channel 5, A liquid channel 6, B liquid channel 7. DETAILED DESCRIPTION

[0018] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the accompanying drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0019] according to Figure 1-Figure 4 Provide further explanation.

[0020] The utility model provides a dual-liquid synchronous grouting device for a shield machine, comprising a grouting block 4, a mixing channel 5 is provided inside the grouting block 4, an A liquid channel 6 is provided inside the grouting block 4 and is located on one side of the mixing channel 5, a B liquid channel 7 is provided inside the grouting block 4 and is located below the mixing channel 5, an A liquid grouting component 1 is fixedly connected to one end of the A liquid channel 6 away from the mixing channel 5, a backwash component 3 is slidably connected inside the B liquid channel 7, and a B liquid grouting component 2 is installed inside the backwash component 3.

[0021] When grouting work is required, liquid A is injected into the liquid A channel 6 through the liquid A grouting component 1, and liquid B is injected into the liquid B channel 7 through the liquid B grouting component 2. Subsequently, liquid A and liquid B enter the mixing channel 5 for mixing, and the mixed mixture is discharged from the outside of the grouting block 4. When the grouting work is completed, the liquid A grouting component 1 can be flushed through the backwash component 3 to prevent liquid A from hanging on the wall and sticking to the inside of the liquid A grouting component 1. Through the synchronous dual-liquid grouting device, the two grouting liquids can be pumped into the pipeline at the rear of the tail shield through the pipeline for mixing. The mixed slurry is discharged from the grouting pipeline and quickly coagulated, so as to fill the annular gap of the pipe segment in a timely and effective manner, thereby avoiding construction failures caused by untimely or insufficient filling of the annular gap.

[0022] As a specific embodiment of the utility model, the A liquid grouting assembly 1 includes an A liquid grouting pipe 11 fixedly connected to the end of the A liquid channel 6 away from the mixing channel 5, and the lower end of the A liquid grouting pipe 11 is connected to a grouting ball valve 12.

[0023] The B liquid grouting assembly 2 includes a B liquid valve seat 23 in an annular shape fixedly installed on the upper end of the fixed seat 35, an annular recess 27 is provided on the inner side of the upper surface of the B liquid valve seat 23, a T-shaped B liquid valve core 22 is placed on the annular recess 27, a guide gasket 25 is fixedly connected to the outside of the B liquid valve core 22, an adjusting spring 24 is sleeved on the outside of the B liquid valve core 22, the upper end of the adjusting spring 24 is fixedly connected to the upper end of the fixed seat 35, and the lower end is fixedly connected to the guide gasket 25, a B liquid grouting pipe 21 is fixedly connected to the inside of the water pipe 31, the upper end of the B liquid grouting pipe 21 is fixedly connected to the lower end of the fixed seat 35, and a gap is left between the B liquid grouting pipe 21 and the water pipe 31.

[0024] When liquid A and liquid B need to be mixed, the operator injects liquid A into the liquid A grouting pipe 11 fixedly connected to the end of the liquid A grouting pipe 11 away from the mixing channel 5. Liquid A is cement slurry. When entering the liquid A grouting pipe 11, liquid A passes through the grouting ball valve 12 fixedly installed at the lower end of the liquid A grouting pipe 11. After entering the liquid A grouting pipe 11, liquid A flows upward into the liquid A channel 6 opened on one side of the mixing channel 5, and then enters the mixing channel 5 opened in the grouting block 4.

[0025] At the same time, the operator pours liquid B into the grouting pipe 21 fixedly connected to the inside of the water pipe 31. Liquid B is also water glass. Liquid B flows upward and first contacts the bottom of the T-shaped liquid B valve core 22. Since the liquid B valve core 22 is placed above the annular concave platform 27 opened on the inner side of the upper surface of the liquid B valve seat 23, the hydraulic valve core and the annular concave platform 27 form a sealing surface, and the liquid B valve core 22 passes through the fixed seat 35. Therefore, during the upward movement of liquid B, liquid B pushes the liquid B valve core 22 to move upward. During the upward movement of liquid B valve core 22, the upper end of the adjusting spring 24 is in contact with the fixed seat 35. The upper end of 35 is fixedly connected, and the lower end is fixedly connected to the guide gasket 25, and the guide gasket 25 is fixedly connected to a position below the center of the B liquid valve core 22. Therefore, during the upward movement of the B liquid valve core 22, the adjusting spring 24 will shrink, and the B liquid valve core 22 will be separated from the B liquid valve seat 23 fixedly connected to the upper end of the fixing seat 35, thereby destroying the sealing surface of the B liquid valve core 22 and the B liquid valve seat 23. Therefore, the B liquid can first move upward through the gap between the B liquid valve core 22 and the fixing seat 35, and then flow into the mixing channel 5 from the upper end of the B liquid valve seat 23. The B liquid and the A liquid are mixed and then discharged from the grouting block 4.

[0026] When there is no need to introduce liquid B anymore, the liquid B valve core 22 is no longer subjected to the thrust of liquid B, and then the adjusting spring 24 is no longer subjected to the external thrust. The adjusting spring 24 recovers its deformation and drives the liquid B valve core 22 to move to the initial position again. The liquid B valve core 22 forms a sealing surface with the annular recess 27 on the liquid B valve seat 23 again.

[0027] As a specific embodiment of the utility model, the backwash component 3 includes a water pipe 31 slidably connected to the mixing channel 5 and the A liquid channel 6, the upper end of the water pipe 31 is fixedly connected to a fixing seat 35 with a through hole inside, the upper end of the fixing seat 35 is threadedly connected to a mounting seat 32, a water outlet 36 is provided on the water pipe 31, a backwash cylinder 34 is provided at the lower end of the water pipe 31, and the lower end of the A liquid grouting pipe 11 is connected to a backwash water ball valve 13.

[0028] Since liquid A is cement slurry, the cement slurry will have a wall-hanging phenomenon, and will stick to the inner wall of the liquid A grouting pipe 11 over time, so it is necessary to flush the liquid A grouting pipe 11. Therefore, when it is necessary to flush the liquid A grouting pipe 11, the operator starts the backwashing cylinder 34 provided at the lower end of the liquid B grouting pipe 21, and the backwashing cylinder 34 pushes the water pipe 31 slidingly connected to the mixing channel 5 and the liquid B channel 7 upward, and the water pipe 31 moves upward to drive the liquid B grouting assembly 2 and the backwashing assembly 3 to move upward as a whole until the water outlet 36 opened on the water pipe 31 is connected to the liquid A channel 6, and then the water pipe 31 and the liquid B channel 7 are connected. The lower end of the grouting pipe 21 is sealed. Since there is a gap between the water pipe 31 and the B liquid grouting pipe 21, and a water inlet is opened on the water pipe 31, the operator connects the external water source to the water inlet, and the external water source enters the gap through the water inlet. Then, after the water inside the gap gradually increases, the water level inside the gap rises and is discharged from the water outlet 36 into the A liquid channel 6, and then enters the A liquid grouting pipe 11, and finally is discharged through the backwash water ball valve 13 connected to the lower end of the A liquid grouting pipe 11. The above process completes the flushing of the A liquid grouting pipe 11 and the A liquid pipeline to prevent the A liquid from hanging on the wall.

[0029] As a specific implementation of the present utility model, a first sealing ring 26 is provided between the B liquid valve seat 23 and the mounting seat 32 .

[0030] By providing a first sealing ring 26 between the B liquid valve seat 23 and the mounting seat 32, it is possible to prevent the mixed liquid of the A liquid and the B liquid from flowing back into the gap between the B liquid valve seat 23 and the mounting seat 32 and then continuing to move downward, thereby achieving a sealing effect.

[0031] As a specific implementation of the present utility model, a second sealing ring 33 is sleeved on the outside of the mounting seat 32 and the water pipe 31 .

[0032] By sleeved a second sealing ring 33 on the outside of the mounting seat 32 and the water pipe 31, the second sealing ring 33 can prevent the backflow of liquid in the mixing channel 5 from passing through the gap between the mounting seat 32 and the mixing channel 5 and the water pipe 31 and the B liquid grouting pipe 21, thereby achieving a sealing effect.

[0033] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dual-liquid synchronous grouting device for a shield machine, characterized in that: The invention comprises a grouting block, wherein a mixing channel is provided inside the grouting block, an A liquid channel is provided inside the grouting block and is located on one side of the mixing channel, a B liquid channel is provided inside the grouting block and is located below the mixing channel, an A liquid grouting assembly is fixedly connected to one end of the A liquid channel away from the mixing channel, a backwash assembly is slidably connected inside the B liquid channel, and a B liquid grouting assembly is installed inside the backwash assembly.

2. A dual-liquid synchronous grouting device for a shield machine according to claim 1, characterized in that: The A liquid grouting assembly comprises an A liquid grouting pipe fixedly connected to one end of the A liquid channel away from the mixing channel, and a grouting ball valve is connected to the lower end of the A liquid grouting pipe.

3. A dual-liquid synchronous grouting device for a shield machine according to claim 1, characterized in that: The backwashing assembly includes a water pipe slidably connected to the mixing channel and the A liquid channel, the upper end of the water pipe is fixedly connected to a fixing seat with a through hole inside, the upper end of the fixing seat is threadedly connected to a mounting seat, a water outlet is opened on the water pipe, a backwashing cylinder is provided at the lower end of the water pipe, and the lower end of the A liquid grouting pipe is connected to a backwashing water ball valve.

4. A dual-liquid synchronous grouting device for a shield machine according to claim 3, characterized in that: The B liquid grouting assembly includes a B liquid valve seat in an annular shape fixedly installed on the upper end of the fixed seat, an annular recess is provided on the inner side of the upper surface of the B liquid valve seat, a T-shaped B liquid valve core is placed on the annular recess, a guide gasket is fixedly connected to the outside of the B liquid valve core, an adjusting spring is sleeved on the outside of the B liquid valve core, the upper end of the adjusting spring is fixedly connected to the upper end of the fixed seat, and the lower end is fixedly connected to the guide gasket, a B liquid grouting pipe is fixedly connected to the inside of the water pipe, the upper end of the B liquid grouting pipe is fixedly connected to the lower end of the fixed seat, and a gap is left between the B liquid grouting pipe and the water pipe.

5. A dual-liquid synchronous grouting device for a shield machine according to claim 3, characterized in that: A first sealing ring is provided between the B liquid valve seat and the mounting seat.

6. A dual-liquid synchronous grouting device for a shield machine according to claim 3, characterized in that: The mounting seat and the water pipe are both sleeved with a second sealing ring.

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