Flow control device for double-liquid synchronous grouting device

Abstract

This utility model relates to a flow control device for a dual-liquid synchronous grouting device. The dual-liquid synchronous grouting device includes a mixing pipe, a first grouting pipe, and a second grouting pipe. Both the first and second grouting pipes are equipped with flow control components, which are threadedly connected to the grouting pipes. When a single pipe is blocked, it can be disassembled and maintained separately without removing other pipes or the mixing pipe, thus improving maintenance convenience. The cross-shaped hollow partition inside the flow control component is removable by bolts and moves with an I-shaped valve driven by a spring. The elastic deformation is used to achieve automatic valve reset and dynamic flow balance adjustment. The first partition is threadedly connected to the I-shaped valve, and the second partition is bolted to the flow control component, forming a separable sealing surface and a closed cavity, which facilitates local cleaning of blockages.

Description

Technical Field

[0001] This utility model belongs to the field of shield tunneling technology, specifically relating to a flow control device for a dual-liquid synchronous grouting device. Background Technology

[0002] The statements herein provide only background information related to this invention and do not necessarily constitute prior art.

[0003] During shield tunnel construction, synchronous grouting technology is a key process to ensure tunnel structural stability, control ground deformation, and prevent surface subsidence. During tunneling, annular gaps form between the tunnel segments and the surrounding rock. If these gaps are not filled in time, they can lead to ground loosening, segment displacement, or even surface collapse. To ensure tunnel structural stability during shield construction, synchronous grouting components must inject grout into the periphery of the tunnel segments simultaneously with the shield's advancement, rapidly filling the gaps and forming a stable support structure.

[0004] Existing synchronous grouting devices often use fixed installation for their internal components. The delivery pipes and mixing pipes for the two grouts are fixed together, and the flow control components cannot be easily disassembled. As the shield tunnel construction progresses, blockages are prone to occur. Once a blockage occurs, cleaning the device requires disassembling the entire grouting system, making it impossible to clean in modules, which seriously affects the progress of tunnel support. Utility Model Content

[0005] The purpose of this invention is to provide a flow control device for a dual-liquid synchronous grouting device, which can at least solve one of the above-mentioned technical problems.

[0006] To achieve the above objectives, embodiments of this utility model provide a flow control device for a dual-liquid synchronous grouting device. The dual-liquid synchronous grouting device is provided with a flow control component, at least two grouting pipes, and a mixing pipe in sequence along the grout flow direction. A cross-shaped perforated baffle is bolted to the inner wall of the flow control component. A spring is connected to the lower side of the cross-shaped perforated baffle. An I-shaped valve is connected to the lower end of the spring. A first baffle is provided below the I-shaped valve. A second baffle is provided at the bottom of the flow control component.

[0007] Furthermore, the grouting pipeline includes a first grouting pipeline and a second grouting pipeline, and the flow control component is respectively installed on the first grouting pipeline and the second grouting pipeline via threaded connection.

[0008] Furthermore, the cross-shaped perforated partition is detachably connected to the inner wall of the flow control component via bolts, enabling disassembly of the flow control component.

[0009] Furthermore, the spring is positioned between the cross-shaped perforated partition and the I-shaped valve, and the spring's elastic force drives the I-shaped valve to move.

[0010] Furthermore, the first partition is connected to the I-shaped valve via a threaded connection.

[0011] Furthermore, the second partition is fixedly connected to the bottom of the flow control assembly by bolts to achieve a seal.

[0012] Furthermore, a pressure sensor is installed at the center of the second partition.

[0013] Furthermore, the flow control component is also provided with a cross-shaped spoke baffle with an I-shaped cross section, the I-shaped valve is disposed through the cross-shaped spoke baffle, and a rubber gasket is provided at the part of the cross-shaped spoke baffle that contacts the I-shaped valve.

[0014] Furthermore, the rubber gasket includes an upper rubber gasket and a lower rubber gasket, which are respectively disposed on both sides of the cross spoke partition that contact the I-shaped valve.

[0015] Furthermore, a slurry inlet is provided on the side of the flow control component near the pressure sensor.

[0016] The beneficial effects of the above technical solutions are as follows: This utility model uses a flow control component threadedly connected to the grouting pipe. When a single pipe is blocked, it can be disassembled and maintained separately without removing other pipes or mixed pipes, thus improving maintenance convenience. The cross-shaped hollow partition is detachable by bolts and moves the I-shaped valve with the help of a spring. The elastic deformation is used to realize the automatic reset of the valve and the dynamic balance adjustment of the flow. The first partition is threadedly connected to the I-shaped valve, and the second partition is bolted to the flow control component, forming a separable sealing surface and a closed cavity, which facilitates local cleaning of blockages.

[0017] The pressure sensor monitors the slurry pressure in real time and can quickly trigger an early warning when there is an abnormality; the I-shaped valve passes through the cross-spoke partition and the contact part is equipped with upper and lower rubber gaskets to achieve guiding and limiting, buffering and anti-wear and dynamic sealing, avoiding direct metal-to-metal friction; the slurry inlet guides the fluid to flow parallel to the sensor surface and uses shear force to prevent particle deposition. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation thereof.

[0019] Figure 1 This is a cross-sectional view of the grouting process in an embodiment of this utility model; Figure 2This is a diagram showing the internal structure of the flow control component in an embodiment of this utility model; Figure 3 This is a structural diagram of the cross-spoke partition in an embodiment of this utility model.

[0020] In the diagram, 1. Mixing pipe; 2. First grouting pipe; 3. Second grouting pipe; 4. Flow control assembly; 5. Impeller groove; 6. Cross-shaped perforated baffle; 7. External thread; 8. Spring; 9. I-shaped valve; 10. Cross-shaped spoke baffle; 11. First baffle; 12. Upper rubber gasket; 13. Lower rubber gasket; 14. Grout inlet; 15. Second baffle; 16. Pressure sensor. Detailed Implementation

[0021] like Figures 1 to 3 As shown, this embodiment provides a flow control device for a dual-liquid synchronous grouting device, which includes a mixing pipe 1 and a grouting pipe.

[0022] like Figure 1 As shown, the grouting pipeline includes a first grouting pipeline 2 and a second grouting pipeline 3. Both the first grouting pipeline 2 and the second grouting pipeline 3 are equipped with flow control components 4. The flow control components 4 are threadedly connected to the first grouting pipeline 2 and the second grouting pipeline 3. The mixing pipeline 1 is equipped with an impeller groove 5.

[0023] Specifically, the ends of the first grouting pipe 2 and the second grouting pipe 3 are machined with internal threads, and the corresponding position of the outer shell of the flow control component 4 is machined with external threads 7. If a single pipe becomes blocked, it can be removed from the grouting pipe simply by rotating the corresponding flow control component 4 in the opposite direction, without having to remove other pipes or the mixing pipe 1.

[0024] The grout entering the mixing pipe 1 through the first grouting pipe 2 and the second grouting pipe 3 is fully mixed under the stirring of the impeller groove 5, and the mixed grout is discharged through the tail end of the mixing channel.

[0025] like Figure 2 As shown, a cross-shaped perforated partition 6 is bolted to the inner wall of the flow control component 4. A spring 8 is connected to the lower side of the cross-shaped perforated partition 6. An I-shaped valve 9 is connected to the lower end of the spring 8. A first partition 11 is provided on the lower side of the I-shaped valve 9. A second partition 15 is provided at the bottom of the flow control component 4.

[0026] Specifically, the spoke baffle 10 is bolted to the inner wall of the flow control assembly 4, forming a detachable support platform. A spring 8 connects the spoke baffle 10 and the I-shaped valve 9, utilizing its elastic deformation characteristics to achieve automatic valve reset. The I-shaped cross-section of the I-shaped valve 9 mates with the fixing component, generating axial displacement under fluid pressure to regulate flow. The first baffle 11 forms a separable sealing surface with the I-shaped valve 9 via a threaded connection, and the second baffle 15 is bolted to the bottom of the assembly, forming a closed cavity. In case of blockage, the spoke baffle 10 or the second baffle 15 can be disassembled individually for localized cleaning of the corresponding cavity. The cross-shaped perforated baffle 6 is detachably connected to the inner wall of the flow control assembly 4 via bolts, allowing for disassembly of the flow control assembly 4. Specifically, the inner wall of the flow control assembly 4 has pre-set mounting holes, and the edges of the cross-shaped spoke baffle 10 have corresponding through holes. The two are fastened together with through bolts. When it is necessary to clean the internal blockage, the cross-shaped spoke baffle 10 can be removed from the flow control assembly 4 simply by unbolting the bolt connection, without disassembling the grouting pipe or mixing pipe 1. like Figure 2 As shown, spring 8 is positioned between the cross-shaped perforated partition 6 and the I-shaped valve 9. The elastic force of spring 8 drives the I-shaped valve 9 to move. When slurry pressure acts on the I-shaped valve 9, the valve experiences axial thrust, causing spring 8 to compress and deform, resulting in axial displacement of the valve. As the valve displacement increases, the cross-sectional area of ​​the slurry channel changes accordingly, creating a dynamic balance between fluid resistance and the restoring force of spring 8. When system pressure fluctuates, the elastic deformation of spring 8 automatically adjusts the valve opening to maintain the flow rate within the set range. During maintenance, the I-shaped valve 9 can automatically reset to its initial position with the deformation of spring 8, facilitating overall cleaning by disassembling the cross-shaped spoke partition 10.

[0027] The first baffle 11 is connected to the I-shaped valve 9 via a threaded connection. During slurry flow, the I-shaped valve 9 undergoes axial displacement under fluid pressure, at which point the threaded connection between the first baffle 11 and the valve is subjected to shear force. When it is necessary to clean slurry residue, the first baffle 11 can be rotated to detach it from the I-shaped valve 9 along the thread lead direction, thus achieving independent disassembly. After disassembly, only the separated baffle or valve needs to be locally cleaned; the entire flow control assembly 4 does not need to be removed. The preload of the threaded connection is controlled by torque during assembly to ensure an effective seal is formed between the baffle and the valve contact surface, preventing slurry leakage.

[0028] The second baffle 15 is fixedly connected to the bottom of the flow control assembly 4 by bolts to achieve a seal. When the second baffle 15 is connected to the bottom of the flow control assembly 4 by bolts, the bolts pass through the mounting holes on the edge of the second baffle 15 and are screwed into the threaded holes at the bottom of the assembly, ensuring a tight fit. When it is necessary to clean the blockage or replace the component, only the bolts need to be removed to remove the second baffle 15 separately, without dismantling the entire flow control assembly 4 or the grouting pipe. During the sealing process, the rubber sealing ring is compressed to fill the gap between the second baffle 15 and the bottom of the assembly, thereby preventing grout leakage. This structure retains the sealing performance while enabling modular maintenance.

[0029] A pressure sensor 16 is installed at the center of the second partition 15. The pressure sensor 16 is embedded in the second partition 15, with its upper surface flush with the upper surface of the second partition 15 to avoid the influence of pressure from other directions. The lower surface of the pressure sensor 16 extends below the second partition 15 to facilitate stable signal transmission with an external computer. The pressure sensor 16 then collects the slurry pressure in the lower region of the flow control component 4 in real time and converts the physical pressure signal into a recognizable electrical signal, which is output to the corresponding controller through a reserved port. During slurry transportation, if the pipeline becomes blocked or the flow rate is abnormal, the pressure sensor 16 can quickly detect pressure fluctuations and trigger an early warning mechanism.

[0030] like Figure 3 As shown, the flow control assembly 4 also includes an I-shaped cross-spoke baffle 10. The I-shaped valve passes through the cross-spoke baffle 10, and a rubber gasket is provided at the contact point between the cross-spoke baffle 10 and the I-shaped valve 9. Driven by the spring 8, the I-shaped valve performs a vertical reciprocating motion along the cross-spoke baffle 10. A guide channel is provided at the center of the cross-spoke baffle 10, restricting the valve to move only along a preset path. When the valve contacts the fixed component, the rubber gasket is compressed and deformed, forming a flexible buffer layer on the contact surface to absorb the vibration energy generated by the valve's movement and simultaneously fill the tiny gaps between the contact surfaces.

[0031] The rubber gaskets include an upper rubber gasket 12 and a lower rubber gasket 13, which are respectively disposed on both sides of the cross-spoke partition 10 in contact with the I-shaped valve 9. When the I-shaped valve 9 moves up and down within the flow control assembly 4, the upper rubber gasket 12 buffers the rigid collision between the valve and the fixing component through elastic deformation, preventing direct friction between metal parts and the generation of debris; the lower rubber gasket 13 undergoes radial deformation as the valve moves down, completely filling the annular gap between the outer wall of the valve and the inner hole of the fixing component. The two gaskets form a complementary sealing structure, continuously maintaining the sealing state of the contact surface during the reciprocating motion of the valve.

[0032] A slurry inlet 14 is provided on the side of the flow control assembly 4 closest to the pressure sensor 16. The slurry inlet 14 is located outside the area where the pressure sensor 16 is located. When slurry is injected through the inlet, the flow direction is guided to flow parallel to the surface of the pressure sensor 16. The shear force generated by the slurry flow continuously acts on the sensor surface, carrying away any particulate matter that may be deposited.

[0033] The working principle of this utility model: When the flow control component 4 is working, different slurries enter the flow control component 4 through the first grouting pipe 2 and the second grouting pipe 3, respectively. The slurry pressure acts on the I-shaped valve 9, causing its compression spring 8 to generate axial displacement, changing the cross-sectional area of ​​the flow channel. Flow stability is achieved through the dynamic balance between fluid resistance and the restoring force of the spring 8. The pressure sensor 16 monitors the slurry pressure at the second baffle 15 in real time, triggering an early warning mechanism when abnormalities occur. The I-shaped valve 9 moves vertically along the guide channel of the cross-spoke baffle 10. The upper and lower rubber gaskets 13 on its contact surface provide buffering and dynamic sealing to avoid direct metal-to-metal friction. The slurry inlet 14 guides the fluid to flow parallel across the sensor surface, using shear force to prevent particle deposition. The impeller groove 5 in the mixing pipe 1 thoroughly mixes the two-component slurry before discharge.

[0034] When the pipe is blocked, the flow control assembly 4 with the threaded connection can be rotated in the opposite direction to achieve complete disassembly; the valve and spring 8 can be removed by removing the bolts of the cross spoke partition 10; the corresponding cavity can be cleaned by separating the threads of the first partition 11 or removing the bolts of the second partition 15.

[0035] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A flow control device for a double-liquid simultaneous grouting device, the double-liquid simultaneous grouting device being sequentially provided with a flow control assembly, at least two grouting pipes and a mixing pipe in the direction of flow of grout, characterized in that, The inner wall of the flow control component is provided with a cross-shaped perforated partition by bolts. A spring is connected to the lower side of the cross-shaped perforated partition. An I-shaped valve is connected to the lower end of the spring. A first partition is provided below the I-shaped valve. A second partition is provided at the bottom of the flow control component.

2. The flow control device for a dual-liquid simultaneous grouting device according to claim 1, characterized in that, The grouting pipeline includes a first grouting pipeline and a second grouting pipeline, and the flow control component is connected by threads and is respectively installed on the first grouting pipeline and the second grouting pipeline.

3. The flow control device for a dual-liquid simultaneous grouting device according to claim 1, characterized in that, The cross-shaped perforated partition is detachably connected to the inner wall of the flow control component by bolts, allowing for the disassembly of the flow control component.

4. The flow control device for a dual-liquid simultaneous grouting device according to claim 1, characterized in that, The spring is positioned between the cross-shaped perforated partition and the I-shaped valve, and the spring's elastic force drives the I-shaped valve to move.

5. The flow control device for a dual-liquid synchronous grouting device as described in claim 1, characterized in that, The first partition is connected to the I-shaped valve by a threaded connection.

6. The flow control device for a dual-liquid simultaneous grouting device according to claim 1, wherein The second baffle is fixedly connected to the bottom of the flow control assembly by bolts to achieve a seal.

7. The flow control device for a dual-liquid simultaneous grouting device according to claim 1, wherein A pressure sensor is installed at the center of the second partition.

8. The flow control device for a dual-liquid simultaneous grouting device according to claim 1, wherein The flow control assembly is also provided with a cross-spoke partition, the I-shaped valve passes through the cross-spoke partition, and a rubber gasket is provided at the part of the cross-spoke partition that contacts the I-shaped valve.

9. A flow control device for a dual liquid simultaneous grouting device as claimed in claim 8, wherein, The rubber gasket includes an upper rubber gasket and a lower rubber gasket, which are respectively disposed on both sides of the cross spoke partition that contact the I-shaped valve.

10. The flow control device for a dual-liquid simultaneous grouting device according to claim 1, characterized in that, The flow control assembly has a slurry inlet on the side closest to the pressure sensor.

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