Double-liquid grouting mixing device for shield

Abstract

The utility model provides a kind of double-liquid grouting mixing device for shield, including A liquid port and double-liquid port, the other side of A liquid port is provided with B liquid pipe seat, B liquid transition pipe is installed and connected in B liquid pipe seat, the side of B liquid transition pipe is provided with B liquid port, the one end side surface of B liquid transition pipe in A liquid port is equipped with threaded connector, the one end of B liquid injection pipe is threadedly connected with threaded connector, B liquid hose is installed with the surface of B liquid injection pipe, the inner wall and outer wall of inlet and outlet are respectively provided with threaded section and connecting groove, so that the mixing device can consider shield synchronous double-liquid grouting clamp connection and pipe piece secondary double-liquid grouting threaded connection form, with certain universality, the mixing device design connection form is quick coupling type, can effectively improve efficiency, and the mixing device can carry out single-liquid grouting, can also carry out double-liquid grouting, effectively improve the practicality of the device.

Description

Technical Field

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

[0002] In recent years, the application of dual-component grout in shield tunnel grouting has also increased. Due to its advantages such as rapid setting, early strength, and strong resistance to water dispersion, it has been given priority when constructing tunnels through water-rich, soft soil strata and sensitive buildings and structures. In shield synchronous dual-component grouting, the mixing form of the two components (usually component A and component B, component A is mostly cement-water glass grout or cement-based grout, and component B is a quick-setting agent or reactant) directly affects the grouting effect (such as setting time, strength development, and filling density) and construction safety (such as the risk of pipeline blockage).

[0003] Currently, the commonly used hybrid methods for shield tunneling dual-liquid grouting in the industry mainly include pre-embedded synchronous dual-liquid grouting pipes in the tail shield ring of the shield machine and secondary dual-liquid grouting through the threaded holes in the center of the tunnel segments. The method of pre-embedded dual-liquid grouting pipes at the end of the tail shield of the shield machine sacrifices the strength of the shield tail to a certain extent, while increasing the difficulty of maintenance and replacement of A / B liquid pipes. The cost is also very high, often hundreds of thousands of yuan. In addition, a threaded secondary dual-liquid grouting mixing device is required. In some tunnel projects, where secondary dual-liquid grouting is standard and synchronous dual-liquid injection is occasionally required, if the method of pre-embedded synchronous dual-liquid grouting pipes in the tail shield ring is still used, it will cause cost and design waste to a certain extent. Utility Model Content

[0004] The purpose of this invention is to provide a dual-liquid grouting mixing device for tunnel boring machines, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a dual-liquid grouting mixing device for tunnel boring machines, comprising an A-liquid port and a dual-liquid port. One end of the A-liquid port is provided with an inlet, and the other end is provided with a smooth flange. One end of the dual-liquid port is provided with an outlet, and the other end is provided with a sealing groove flange. The smooth flange and the sealing groove flange are connected by a quick-connect coupling. A first water port is provided on one side of the A-liquid port, and a B-liquid pipe seat is provided on the other side. A B-liquid transition pipe is installed and connected inside the B-liquid pipe seat, and a... The device has a B-liquid port, and a second water port is provided at one end of the B-liquid transition pipe. A threaded interface is provided on the side of the end of the B-liquid transition pipe located inside the A-liquid port. The threaded interface is threadedly connected to one end of the B-liquid injection pipe. A B-liquid hose is fitted onto the surface of the B-liquid injection pipe. At least one nozzle is radially opened on the surface of the B-liquid injection pipe. One end of the B-liquid injection pipe is sealed and an internal hexagonal groove is provided at the end. The first water port, the B-liquid pipe seat, and the B-liquid port all use threaded interfaces. The outer surface of the B-liquid transition pipe is provided with external threads. The B-liquid transition pipe is connected to the B-liquid pipe seat by means of threaded connection.

[0006] As a preferred technical solution of this utility model, the surface of the B liquid injection pipe at one end of the threaded interface is inverted conical, and the B liquid hose is made of highly elastic rubber.

[0007] As a preferred technical solution of this utility model, the inner and outer walls of the liquid inlet and the liquid outlet are respectively provided with threaded sections and connecting grooves.

[0008] As a preferred technical solution of this utility model, the inner wall of the B liquid pipe seat at the end is provided with a first sealing groove, and a first sealing ring is provided in the first sealing groove. The surface of the sealing groove flange is provided with a second sealing groove, and a second sealing ring is provided in the second sealing groove.

[0009] As a preferred technical solution of this utility model, the first water port and the B liquid pipe seat are fixed to the A liquid port by welding, and the B liquid port and the B liquid transition pipe are fixed by welding.

[0010] As a preferred technical solution of this utility model, valves can be installed at the first water port and the second water port to connect to an external water source.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting threaded sections and connecting grooves on the inner and outer walls of the inlet and outlet respectively, the mixing device can accommodate both shield tunnel synchronous double-liquid grouting clamp connection and segment secondary double-liquid grouting threaded connection, thus having a certain degree of versatility. The mixing device is designed with a quick-connect connection, which can effectively improve efficiency. Moreover, the mixing device can perform single-liquid grouting as well as double-liquid grouting, effectively enhancing the practicality of the device. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] In the diagram: 1. Liquid A port; 2. Liquid B port; 3. Liquid B transition pipe; 4. First water port; 5. Second water port; 6. Liquid B pipe seat; 7. Liquid B hose; 8. Liquid B injection pipe; 9. Quick-connect coupling; 10. Dual liquid port; 11. First sealing ring; 12. Second sealing ring; 13. Liquid inlet; 14. Smooth flange; 15. Liquid outlet; 16. Sealing groove flange; 17. Threaded section; 18. Connecting groove; 19. First sealing groove; 20. Second sealing groove; 21. Nozzle; 22. Internal hexagonal groove. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1This utility model provides the following technical solution: a dual-liquid grouting mixing device for tunnel boring machines, including an A-liquid port 1 and a dual-liquid port 10. One end of the A-liquid port 1 is provided with an inlet 13, and the other end is provided with a smooth flange 14. One end of the dual-liquid port 10 is provided with an outlet 15, and the other end is provided with a sealing groove flange 16. The smooth flange 14 and the sealing groove flange 16 are connected by a quick-connect coupling 9. A first water port 4 is provided on one side of the A-liquid port 1, and a B-liquid pipe seat 6 is provided on the other side of the A-liquid port 1. A B-liquid transition pipe 3 is installed and connected inside the B-liquid pipe seat 6, and a B-liquid transition pipe 3 is provided on one side of the B-liquid transition pipe 3. There is a B liquid port 2, and a second water port 5 is provided at one end of the B liquid transition pipe 3. The side of the end of the B liquid transition pipe 3 located inside the A liquid port 1 has a threaded interface, which is threadedly connected to one end of the B liquid injection pipe 8. A B liquid hose 7 is sleeved on the surface of the B liquid injection pipe 8. At least one nozzle 21 is radially opened on the surface of the B liquid injection pipe 8. One end of the B liquid injection pipe 8 is sealed and an internal hexagonal groove 22 is opened at the end. The first water port 4, the B liquid pipe seat 6 and the B liquid port 2 all use threaded interfaces. The outer surface of the B liquid transition pipe 3 is provided with external threads. The B liquid transition pipe 3 is connected to the B liquid pipe seat 6 by means of threaded connection.

[0017] In this embodiment, the surface of the B liquid injection pipe 8 at one end of the threaded interface is inverted conical, and the B liquid hose 7 is made of highly elastic rubber.

[0018] Specifically, since the surface of the B-liquid injection pipe 8 at the threaded interface is inverted conical, the inverted conical structure can effectively fix the B-liquid hose 7, thereby effectively maintaining the installation position of the B-liquid hose 7 under pressure. Under the action of the B-slurry, the B-liquid hose 7 can be opened in the positive direction. The B-slurry is sprayed out through the nozzle 21 and flows out from the gap between the B-liquid injection pipe 8 and the B-liquid hose 7, mixing with the A-slurry. After the injection of the B-slurry stops, since the B-liquid hose 7 is made of highly elastic rubber, the B-liquid hose 7 can effectively fit against the B-liquid injection pipe 8, effectively preventing the A-slurry from entering the B-liquid injection pipe 8.

[0019] In this embodiment, the inner and outer walls of the liquid inlet 13 and the liquid outlet 15 are respectively provided with threaded sections 17 and connecting grooves 18.

[0020] Specifically, during secondary double-liquid grouting, the threaded section 17 on the inner wall of the outlet 15 of the double-liquid port 10 is connected to the threaded port at the center of the formed segment. When using synchronous double-liquid grouting, the connecting groove 18 on the outer wall of the outlet 15 of the double-liquid port 10 is connected to the synchronous grouting inlet groove at the tail of the tunnel boring machine through a quick-groove clamp. This allows the mixing device to accommodate both the synchronous double-liquid grouting clamp connection and the threaded connection of the secondary double-liquid grouting of the segment, thus making the mixing device versatile.

[0021] In this embodiment, a first sealing groove 19 is provided on the inner wall of the B liquid pipe seat 6 at the end, and a first sealing ring 11 is provided in the first sealing groove 19. A second sealing groove 20 is provided on the surface of the sealing groove flange 16, and a second sealing ring 12 is provided in the second sealing groove 20.

[0022] Specifically, the first sealing groove 19, in conjunction with the first sealing ring 11, can improve the sealing performance at the connection between the B liquid pipe seat 6 and the B liquid transition pipe 3, while the second sealing groove 20, in conjunction with the second sealing ring 12, can improve the sealing performance at the connection between the smooth flange 14 and the sealing groove flange 16.

[0023] Working principle: During secondary dual-liquid grouting, the threaded section 17 on the inner wall of the outlet 15 of the dual-liquid port 10 is connected to the threaded port at the center of the formed segment. When using synchronous dual-liquid grouting, the connecting groove 18 on the outer wall of the outlet 15 of the dual-liquid port 10 is connected to the synchronous grouting inlet groove at the tail of the tunnel boring machine via a quick-groove clamp. This makes the mixing device versatile. During dual-liquid grouting, grout A is connected to the inlet 13 of grout port 1, entering grout port 1 through inlet 13. Grout B is connected to the threaded interface of grout port 2, entering grout transition pipe 3 and then grout injection pipe 8 through grout port 2. Under the action of grout B, the grout B hose 7 can be opened in the positive direction. Grout B is sprayed out through nozzle 21 and flows out from the gap between grout B injection pipe 8 and grout B hose 7, and then mixes with grout A. The mixed grout is transported to the gap between the segments of the shield tail or the gap between the formed segments through the outlet 15 of the dual-liquid port 10. After the dual-liquid grouting is completed, high-pressure water can be injected through the first water port 4 to flush the mixing device. External water can be connected through the second water port 5 to flush grout B transition pipe 3, grout B injection pipe 8 and grout B hose 7 regularly. Since grout B injection pipe 8 is threadedly connected to grout B transition pipe 3, grout B injection pipe 8 can be quickly removed and replaced through the internal hexagonal groove 22.

[0024] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dual-liquid grouting mixing device for tunnel boring machines, comprising an A-liquid port (1) and dual-liquid ports (10), characterized in that: One end of the A liquid port (1) is provided with an inlet (13), and the other end of the A liquid port (1) is provided with a smooth flange (14). One end of the dual liquid port (10) is provided with an outlet (15), and the other end of the dual liquid port (10) is provided with a sealing groove flange (16). The smooth flange (14) and the sealing groove flange (16) are connected by a quick-connect clamp (9). One side of the A liquid port (1) is provided with a first water port (4), and the other side of the A liquid port (1) is provided with a B liquid pipe seat (6). A B liquid transition pipe (3) is installed and connected inside the B liquid pipe seat (6). One side of the B liquid transition pipe (3) is provided with a B liquid port (2), and one end of the B liquid transition pipe (3) is provided with a second water port (5). The transition pipe (3) has a threaded interface on one side inside the A liquid port (1). The threaded interface is threaded to one end of the B liquid injection pipe (8). The surface of the B liquid injection pipe (8) is fitted with a B liquid hose (7). The surface of the B liquid injection pipe (8) has at least one nozzle (21) radially opened. One end of the B liquid injection pipe (8) is blocked. The first water port (4), the B liquid pipe seat (6) and the B liquid port (2) all use threaded interfaces. The outer surface of the B liquid transition pipe (3) is provided with external threads. The B liquid transition pipe (3) is connected to the B liquid pipe seat (6) by threaded connection. The inner and outer walls of the inlet (13) and the outlet (15) are respectively provided with threaded sections (17) and connecting grooves (18).

2. The shield tunneling dual-liquid grouting mixing device according to claim 1, characterized in that: The surface of the B liquid injection pipe (8) at one end of the threaded interface is tapered, and the B liquid hose (7) is made of highly elastic rubber.

3. The shield tunneling dual-liquid grouting mixing device according to claim 1, characterized in that: An internal hexagonal groove (22) is provided at one end of the B liquid injection pipe.

4. The shield tunneling dual-liquid grouting mixing device according to claim 1, characterized in that: The inner wall of the B liquid pipe seat (6) at the end is provided with a first sealing groove (19), and a first sealing ring (11) is provided in the first sealing groove (19). The surface of the sealing groove flange (16) is provided with a second sealing groove (20), and a second sealing ring (12) is provided in the second sealing groove (20).

5. The shield tunneling dual-liquid grouting mixing device according to claim 1, characterized in that: The first water port (4) and the B liquid pipe seat (6) are fixed to the A liquid port (1) by welding, and the B liquid port (2) and the B liquid transition pipe (3) are fixed by welding.

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