Multi-mode slurry circulating system and pipe jacking machine

Abstract

The application discloses a multi-mode slurry circulating system and a pipe jacking machine, which comprises valve assembly one, valve assembly two, valve assembly three, valve assembly four, a connecting pipe and an inlet and discharge slurry pipe; valve assembly two is sequentially arranged in front of the first branch of valve assembly one; valve assembly three is sequentially arranged in front of the second branch of valve assembly one; the connecting pipe and valve assembly four are sequentially arranged in the second branch of valve assembly one; the outlets of valve assemblies two, three and four are respectively communicated with the outer pipe opening, the inner and outer circulating openings, the slurry discharge opening and the direct discharge opening arranged in the pipe jacking machine head through the slurry pipe; the rear end ports of valve assembly one are respectively connected with the inlet and discharge slurry pipe; and the flange surfaces of all valve assemblies are sealed by using sealing pads. The application can build a multi-channel slurry circulating system through the opening and closing combination of slurry valve assemblies, greatly improve the slurry discharging effect of the pipe jacking machine and improve the adaptability of the pipe jacking machine in complex stratum construction.

Description

Technical Field

[0001] This invention relates to the field of pipe jacking construction technology, and in particular to a multi-mode slurry circulation system and a pipe jacking machine. Background Technology

[0002] Existing slurry-balanced pipe jacking machines have a crushing chamber and a slurry chamber at the machine head. The soil cut by the front cutterhead is crushed in the crushing chamber and then mixed in the slurry chamber before being transported to the surface through the slurry discharge pipe. The internal slurry inlet and outlet system only has an external circulation mode of water inlet pipe-crushing chamber-drainage pipe, an internal circulation mode of water inlet pipe-slurry chamber-drainage pipe, and a bypass mode of slurry inlet pipe-slurry discharge pipe. However, when using slurry-balanced pipe jacking machines for underground pipe jacking operations, due to the irregularity of the strata and the complex and variable geological conditions, complex geological conditions such as composite layers of rock, soil, clay, and sand may occur. The machine head often experiences problems such as blockage of the slag leakage hole in the crushing chamber, poor slag discharge, and slag accumulation in the gaps outside the excavated tunnel, which increases the jacking resistance or makes it difficult to correct deviation. The adaptability of existing slurry-balanced pipe jacking machines is reduced, thus restricting the speed of pipe jacking construction. Summary of the Invention

[0003] In response to the problems of clogging of the slag leakage hole in the crushing chamber, poor slag discharge, excessive jacking resistance or difficulty in correction caused by slag accumulation in the above-mentioned mud balance pipe jacking construction, the purpose of this invention is to provide a multi-mode mud-water circulation system and pipe jacking machine. By constructing a multi-channel mud-water circulation system, the slag discharge and performance of the pipe jacking machine are greatly improved.

[0004] To achieve the above objectives, the present invention provides a multi-mode slurry circulation system, comprising valve assembly one, valve assembly two, valve assembly three, valve assembly four, connecting pipe, slurry discharge pipe, and slurry inlet pipe; valve assembly two and valve assembly three are sequentially arranged in front of the first branch of valve assembly one; the connecting pipe and valve assembly four are sequentially arranged in the second branch of valve assembly one; valve assembly two, valve assembly three, and valve assembly four are respectively connected to the outer port, inner circulation port, outer circulation port, slurry discharge port, and straight discharge port provided in the head of the pipe jacking machine through slurry pipes; the rear port of the first branch of valve assembly one is connected to the slurry inlet pipe, and the rear port of the second branch of valve assembly one is connected to the slurry discharge pipe.

[0005] Furthermore, the valve assembly consists of two three-way ball valves, a push rod, a base, a hydraulic cylinder, a trunnion, and a linkage bracket; the two "T" ports of the three-way ball valves are arranged together, and the base is installed on the vertical center plane of the sludge discharge pipe and the sludge inlet pipe; the hydraulic cylinder is fixed to the base by the trunnion; the cylinder head of the rod chamber of the hydraulic cylinder is connected to the linkage bracket; a push rod is installed above the valve stem of the three-way ball valves, and the push rod is connected to the linkage bracket.

[0006] Furthermore, the three-way ball valve is fixed to the rear flange of the sludge discharge pipe and the sludge inlet pipe by bolt connection.

[0007] Furthermore, the cylinder head of the rod chamber of the hydraulic cylinder is hinged to the linkage bracket via a second pin 18.

[0008] Furthermore, the other end of the push rod is inserted into the linkage bracket and fixed by a pin.

[0009] Furthermore, valve assembly two, valve assembly three, and valve assembly four are all composed of three-way ball valve two, push rod two, pin three, cylinder bracket, cylinder two, and trunnion two; the cylinder bracket is fixed to the T-port flange surface of the three-way ball valve two, and the cylinder two is fixed to the cylinder bracket by the trunnion two; push rod two is installed above the valve stem of the three-way ball valve, and the other end of push rod two is hinged to the rod chamber cylinder head of cylinder two by the pin three.

[0010] Furthermore, valve assembly two, valve assembly three, and valve assembly four are all driven by the extension and retraction of the hydraulic cylinder to switch the three-way ball valve two.

[0011] Furthermore, valve assembly three and valve assembly four can replace valve assembly two through a T-port docking arrangement.

[0012] Furthermore, the flange connections of valve assembly one, valve assembly two, valve assembly three, and valve assembly four are all sealed with gaskets.

[0013] Furthermore, a pipe jacking machine employs the aforementioned multi-mode slurry circulation system.

[0014] Compared with existing technologies, the purpose of this invention is to provide a multi-mode slurry circulation system and a pipe jacking machine. By combining the opening and closing of slurry valve groups, a slurry circulation mode can be constructed, including internal circulation, external circulation, internal bypass, external pipe circulation, direct discharge, and backwashing. This makes the operation of the pipe jacking machine more flexible and improves its adaptability to construction in complex geological formations. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the valve assembly structure;

[0017] Figure 3 This is a schematic diagram of valve assembly two.

[0018] Figure 4 This is a schematic diagram of the loop mode;

[0019] In the diagram: 1. Valve assembly one, 2. Valve assembly two, 3. Valve assembly three, 4. Valve assembly four, 5. Connecting pipe, 6. Sealing gasket, 7. Sludge discharge pipe, 8. Sludge inlet pipe, 9. Pipe outer opening, 10. Sludge pipe, 11. Three-way ball valve one, 12. Push rod one, 13. Pin one, 14. Base, 15. Hydraulic cylinder one, 16. Trunnion one, 17. Linkage bracket, 18. Pin two, 21. Three-way ball valve two, 22. Push rod two, 23. Pin three, 24. Hydraulic cylinder bracket, 25. Hydraulic cylinder two, 26. Trunnion two, 31. Sludge discharge port, 32. Straight discharge port, 33. Internal circulation port, 34. External circulation port. Detailed Implementation

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] like Figure 1 As shown, a multi-mode slurry circulation system can be used in the operation of a pipe jacking machine, including valve assembly 1, valve assembly 2, valve assembly 3, valve assembly 4, connecting pipe 5, sealing gasket 6, slurry discharge pipe 7, and slurry inlet pipe 8. Valve assembly 2 and valve assembly 3 are sequentially installed in front of the first branch of valve assembly 1 (defined as front from the direction of the machine head); connecting pipe 5 and valve assembly 4 are sequentially installed in the second branch of valve assembly 1; valve assembly 2, valve assembly 3, and valve assembly 4 are connected to the external port 9, internal circulation port 33, external circulation port 34, slurry discharge port 31, and direct discharge port 32 located inside the machine head of the pipe jacking machine via slurry pipe 10, respectively; the rear port of the first branch of valve assembly 1 is connected to the slurry inlet pipe 8, and the rear port of the second branch of valve assembly 1 is connected to the slurry discharge pipe 7. All valve assembly flange connections are sealed with sealing gasket 6.

[0022] In this embodiment, as Figure 2 As shown, the valve assembly 1 consists of two three-way ball valves 11, a push rod 12, a pin 13, a base 14, a cylinder 15, a trunnion 16, a linkage bracket 17, and a second pin 18. The two three-way ball valves 11 are arranged with their "T" joints connected together. The base 14 is located on the vertical center plane of the sludge discharge pipe 7 and the sludge inlet pipe 8, and is bolted to the rear of the flanges of the sludge discharge pipe 7 and the sludge inlet pipe 8. The cylinder 15 is fixed to the base 14 by the trunnion 16. The cylinder head of the cylinder 15 with a rod chamber is connected to the linkage bracket 17 and is hinged by the second pin 18. A push rod 12 is installed above the ball valve stem, and the other end of the push rod 12 passes through the linkage bracket 17 and is fixed by the pin 13. Thus, the cylinder extension and retraction drive the three-way ball valve to change direction simultaneously.

[0023] In this embodiment, as Figure 3As shown, the valve assembly 2 consists of a three-way ball valve 21, a push rod 22, a pin 23, a cylinder bracket 24, a cylinder 25, and a trunnion 26. The cylinder bracket 24 is fixed to the T-port flange of the three-way ball valve 21, and the cylinder 25 is fixed to the cylinder bracket 24 via the trunnion 26. A push rod 22 is installed above the ball valve stem, and the other end of the push rod 22 is hinged to the rod-side cylinder head of the cylinder 25 via the pin 23. The extension and retraction of the cylinder drives the reversing of the three-way ball valve.

[0024] In this embodiment, valve assembly 3, valve assembly 4 and valve assembly 2 have the same structure and function, and are all driven by the extension and retraction of the oil cylinder to realize the reversal of the three-way ball valve 21.

[0025] In this embodiment, the valve assembly 2 can also achieve its function by being arranged through the "T" port connection of the valve assembly 3 and the valve assembly 4.

[0026] In this embodiment, a multi-mode slurry circulation system is provided, wherein the circulation mode is switched by the combination of opening and closing between slurry valve groups, such as... Figure 4 As shown. Specific implementation method:

[0027] 1. External circulation mode: Valve assembly 1 is closed, valve assembly 2 is closed, valve assembly 3 is closed, and valve assembly 4 is closed, thereby connecting the mud inlet, crushing chamber, mud-water chamber, and mud outlet, realizing the mixing and lubrication of the slag in the jacking crushing chamber, and promoting the flow of slag into the mud-water chamber. This mode is the initial state of mud inlet and outlet.

[0028] 2. Internal circulation mode: Valve assembly 1 is closed, valve assembly 2 is closed, valve assembly 3 is open, and valve assembly 4 is closed, thus connecting the mud inlet, mud-water tank, and mud outlet, and achieving full mixing of mud and slag in the mud-water tank.

[0029] 3. Internal bypass mode: Valve assembly 1 is open, and the states of valve assembly 2, valve assembly 3, and valve assembly 4 are not restricted, thus connecting the mud inlet and the mud outlet. Its function is to maintain the mud-water balance during construction and facilitate pipe replacement operations.

[0030] 4. External circulation mode: Valve assembly 1 is closed, valve assembly 2 is open, valve assembly 3 is in an unrestricted state, and valve assembly 4 is closed. This allows the mud inlet, external pipe, crushing chamber, mud-water chamber, and mud outlet to be connected, enabling the backflushing of debris accumulated in the external gaps of the excavated hole to the crushing chamber, preventing increased jacking resistance or pipe jamming.

[0031] 5. Direct discharge mode: Valve assembly 1 is closed, valve assembly 2 is closed, valve assembly 3 is closed, and valve assembly 4 is open, thus connecting the mud inlet, crushing chamber, and mud outlet, allowing the slag in the crushing chamber to be discharged directly, relieving pressure or blockage in the crushing chamber.

[0032] 6. Backflushing mode: Valve assembly 1 is closed, valve assembly 2 is closed, valve assembly 3 is open, and valve assembly 4 is open, thereby connecting the mud inlet, mud-water chamber, crushing chamber, and mud outlet, and backflushing the slag leakage hole of the crushing chamber to prevent slag leakage hole blockage.

[0033] The above description is merely a description of the preferred embodiment and is not intended to limit the concept and scope of the invention. Various modifications and improvements to the technical solution of the invention should fall within the protection scope of this invention.

Claims

1. A multi-mode slurry circulation system, characterized in that: It includes valve assembly one (1), valve assembly two (2), valve assembly three (3), valve assembly four (4), connecting pipe (5), sludge discharge pipe (7) and sludge inlet pipe (8); Valve assembly 2 (2) and valve assembly 3 (3) are sequentially arranged in front of the first branch of valve assembly 1 (1); connecting pipe (5) and valve assembly 4 (4) are sequentially arranged in the second branch of valve assembly 1 (1). Valve assembly two (2), valve assembly three (3), and valve assembly four (4) are connected to the pipe external port (9), internal circulation port (33), external circulation port (34), mud discharge port (31), and straight discharge port (32) respectively provided in the head of the pipe jacking machine through the mud pipe (10); wherein, valve assembly two (2) is connected to the pipe external port (9), valve assembly three (3) is connected to the internal circulation port (33) and external circulation port (34) respectively, and valve assembly four (4) is connected to the mud discharge port (31) and straight discharge port (32) respectively; The first branch rear port of the valve assembly (1) is connected to the mud inlet pipe (8), and the second branch rear port of the valve assembly (1) is connected to the mud discharge pipe (7).

2. The multi-mode slurry circulation system according to claim 1, characterized in that: The valve assembly (1) consists of two three-way ball valves (11), a push rod (12), a base (14), a cylinder (15), a trunnion (16), and a linkage bracket (17). The two "T" ports of the three-way ball valve (11) are arranged together. The base (14) is installed on the vertical center plane of the mud discharge pipe (7) and the mud inlet pipe (8). The cylinder (15) is fixed on the base (14) by the trunnion (16). The cylinder (15) has a rod chamber cylinder head connected to the linkage bracket (17). The push rod (12) is installed above the valve stem of the three-way ball valve (11), and the push rod (12) is connected to the linkage bracket (17).

3. The multi-mode sludge-water circulation system according to claim 2, characterized in that: The three-way ball valve (11) is fixed to the rear of the flange of the mud discharge pipe (7) and the mud inlet pipe (8) by bolt connection.

4. A multi-mode slurry circulation system according to claim 2, characterized in that: The cylinder head of the rod chamber of the first oil cylinder (15) is hinged to the linkage bracket (17) through the second pin 18.

5. A multi-mode slurry circulation system according to claim 2, characterized in that: The other end of the push rod (12) is inserted into the linkage bracket (17) and fixed by the pin (13).

6. A multi-mode slurry circulation system according to claim 1, characterized in that: The valve assembly two (2), valve assembly three (3), and valve assembly four (4) are all composed of a three-way ball valve two (21), a push rod two (22), a pin three (23), a cylinder bracket (24), a cylinder two (25), and a trunnion two (26). The cylinder bracket (24) is fixed on the T-port flange of the three-way ball valve two (21), and the cylinder two (25) is fixed on the cylinder bracket (24) by the trunnion two (26). A push rod two (22) is installed above the valve stem of the three-way ball valve, and the other end of the push rod two (22) is hinged to the rod chamber cylinder head of the cylinder two (25) by the pin three (23).

7. A multi-mode slurry circulation system according to claim 6, characterized in that: Valve assembly two (2), valve assembly three (3), and valve assembly four (4) are all driven by the extension and retraction of the oil cylinder to switch the three-way ball valve two (21).

8. A multi-mode slurry circulation system according to claim 6, characterized in that: Valve assembly three (3) and valve assembly four (4) can replace valve assembly two (2) through the docking arrangement of the "T" port.

9. A multi-mode slurry circulation system according to claim 1, characterized in that: The flange connections of valve assembly one (1), valve assembly two (2), valve assembly three (3), and valve assembly four (4) are all sealed with gaskets (6).

10. A pipe jacking machine, characterized in that, The multi-mode mud-water circulation system described in any one of claims 1 to 9 is adopted.

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