A supply system for high-pressure jet grouting piles
Patent Information
- Application Number
- CN202522390653.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-11
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-11-11
AI Technical Summary
对于施工作业来说，往往需要对多处进行喷桩处理，在对高压旋喷桩的喷桩位置进行调整的过程中，避免浆液落在地面上，需对泥浆泵进行关闭，然而这种频繁的启停操作不仅会影响泥浆泵的使用寿命，而且管道内残余的浆液还容易凝固在管道上，从而影响浆液的输送效率
[0011]本实用新型有益效果是：首先，本实用新型通过设置的泥浆泵、空气压缩机和增压泵，分别对浆液输送管、空气输送管和水液输送管进行加压处理，通过设置的压力传感器一、压力传感器二和压力传感器三，方便分别掌握浆液输送管、空气输送管和水液输送管的压力信息，通过设置的调节阀一、调节阀二和调节阀，分别控制浆液输送管、空气输送管和水液输送管流量大小，以便根据喷桩作业要求进行调整。而且本实用新型通过设置的搅拌罐，能够对浆液持续进行搅拌，使得浆液均匀且防止浆液出现离析现象，通过设置的三通阀一，能够控制泥浆泵输出的浆液通过循环管输送回搅拌罐或通过浆液输送管输送到钻杆内，以减少泥浆泵的启停操作，通过浆液输送管与空气输送管之间设置的带有调节阀四的冲排管，以便控制空气输送到三通阀一远离搅拌罐一侧的浆液输送管内，从而将通阀一远离搅拌罐一侧的浆液输送管和钻杆内输送浆液从钻头内吹出，由于三通阀一靠近搅拌罐一侧的浆液输送管持续进行浆液流动，从而避免浆液输送管浆液出现凝固现象，以便提高浆液输送管的使用效果。
Smart Images
Figure CN224784888U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of supply technology for high-pressure jet grouting piles, and specifically to a supply system for high-pressure jet grouting piles. Background Technology
[0002] High-pressure jet grouting is a type of foundation reinforcement equipment. Its working principle involves using a drilling rig to advance a drill rod with a nozzle to a predetermined position in the soil layer. A high-pressure jet of grout, water, or air is then forcefully ejected from the nozzle, cutting and breaking down the soil. During the jetting process, the drill rod is gradually raised, forcibly mixing the grout with the soil particles. After the grout solidifies, it forms continuous or discrete reinforced piles in the soil, improving the bearing capacity of the foundation, preventing water seepage, or forming a support structure. High-pressure jet grouting has the advantages of high pile formation efficiency and low cost. It allows for the construction of a large number of piles in a short time, significantly shortening the construction period. Furthermore, its internal quality is fully guaranteed; it does not generate vibration or noise during foundation reinforcement, causing no pollution to the surrounding environment and meeting the needs of various projects. This makes high-pressure jet grouting applicable to a wide range of geological conditions, and its high pile strength allows it to adapt to various complex geological conditions. Therefore, high-pressure jet grouting piles are widely used in projects such as deep foundation pit excavation, dam seepage prevention, and building foundation reinforcement, making high-pressure jet grouting piles a commonly used foundation treatment method.
[0003] Depending on the type of grouting pipe, high-pressure jet grouting piles can be divided into single-pipe, double-pipe, and triple-pipe methods. The single-pipe method uses only one grouting pipe to inject high-pressure grout; this method is simple but results in a smaller pile diameter. The double-pipe method uses two grouting pipes to simultaneously inject high-pressure grout and air. The mixture of high-pressure grout and air can more effectively disrupt the soil structure during injection, forming a larger consolidated body. The triple-pipe method uses three pipes to deliver water, air, and grout respectively. This method has a stronger injection force and can form a larger diameter consolidated body. Therefore, the triple-pipe method is suitable for reinforcing complex soil structures. In the construction of triple-pipe high-pressure jet grouting piles, the supply of high-pressure water, high-pressure air, and mortar are all essential. For construction operations, multiple jet grouting piles are often required. During the adjustment of the jet grouting pile positions, to prevent grout from falling onto the ground, the mud pump needs to be shut down. However, this frequent start-up and shutdown not only affects the service life of the mud pump, but also causes residual grout in the pipeline to easily solidify, thus affecting the grout delivery efficiency. Therefore, the high-pressure jet grouting pile supply system has shortcomings. By improving the high-pressure jet grouting pile supply system, reducing the number of mud pump start-ups and shutdowns, and minimizing grout solidification in the pipeline, a stable supply of high-pressure jet grouting piles can be maintained, thereby improving the quality of the project. Summary of the Invention
[0004] To address the shortcomings of existing technologies, this utility model provides a high-pressure jet grouting pile supply system that reduces the solidification of grout on pipelines and reduces the number of times the mud pump starts and stops, thereby overcoming the deficiencies in existing technologies.
[0005] The technical solution adopted in this utility model is as follows: a supply system for high-pressure jet grouting piles, including a high-pressure jet grouting pile equipped with a drill rod. The drill rod is respectively equipped with a slurry delivery pipe, an air delivery pipe, and a water delivery pipe. The slurry delivery pipe is sequentially equipped with a regulating valve, a pressure sensor, a three-way valve, and a mud pump along the direction away from the drill rod. The air delivery pipe is sequentially equipped with a regulating valve, a pressure sensor, and an air compressor along the direction away from the drill rod. The water delivery pipe is sequentially equipped with a pressure sensor, a regulating valve, and a booster pump along the direction away from the drill rod. The slurry delivery pipe is located away from the drill rod... A mixing tank is installed at one end of the drill rod. The input end of the three-way valve is connected to the bottom end of the mixing tank via a mud pump. The first output end of the three-way valve is connected to the first pressure sensor. A circulation pipe is installed between the mixing tank and the three-way valve. The two ends of the circulation pipe are connected to the second output end of the three-way valve and the top end of the mixing tank, respectively. A flushing pipe is installed between the slurry delivery pipe and the air delivery pipe. The slurry delivery pipe between the three-way valve and the first pressure sensor, and the air delivery pipe between the second pressure sensor and the air compressor are respectively connected to the two ends of the flushing pipe. A regulating valve is installed on the flushing pipe.
[0006] Preferably, a three-way valve two is provided between the pressure sensor three and the regulating valve three. The three-way valve two is installed on the water delivery pipe. The input end of the three-way valve two is connected to the regulating valve three. The first output end of the three-way valve one is connected to the pressure sensor three. A three-way valve three is provided on one side of the three-way valve two. The input end of the three-way valve three is connected to the second output end of the three-way valve two. The first output end of the three-way valve three is connected to the circulation pipe. The slurry delivery pipe between the three-way valve one and the pressure sensor one is connected to the second output end of the three-way valve three.
[0007] Preferably, a one-way valve is provided on the air supply pipe between the flushing pipe and the air compressor, with the input end of the one-way valve facing the air compressor, and an air filter is provided on the air supply pipe of the air compressor away from the one-way valve.
[0008] Preferably, the air delivery pipe is provided with a heat exchanger, a regulating valve, a gas buffer tank, and a shut-off valve in sequence along the direction from the air compressor to the one-way valve. The heat exchanger, the regulating valve, the gas buffer tank, and the shut-off valve are all located between the air compressor and the one-way valve.
[0009] Preferably, a check valve 2 is provided between the mud pump and the three-way valve 1, with the output end of the check valve 2 facing the three-way valve 1; a check valve 3 is provided between the regulating valve 3 and the booster pump, with the output end of the check valve 3 facing the regulating valve 3.
[0010] Preferably, the water delivery pipe is provided with a water filter and a shut-off valve 2 in sequence along the direction from the regulating valve 3 to the booster pump, and the water filter and shut-off valve 2 are located on the side of the booster pump away from the regulating valve 3.
[0011] The beneficial effects of this utility model are as follows: First, this utility model uses a mud pump, an air compressor, and a booster pump to pressurize the slurry delivery pipe, air delivery pipe, and water delivery pipe respectively. Pressure sensors one, two, and three are used to easily monitor the pressure information of the slurry delivery pipe, air delivery pipe, and water delivery pipe respectively. Regulating valves one, two, and three are used to control the flow rate of the slurry delivery pipe, air delivery pipe, and water delivery pipe respectively, so as to adjust according to the requirements of the shotcrete operation. Furthermore, this invention utilizes a mixing tank to continuously agitate the slurry, ensuring uniformity and preventing segregation. A three-way valve allows control over the slurry output from the mud pump, enabling it to be either returned to the mixing tank via a circulation pipe or delivered to the drill pipe via a slurry delivery pipe, reducing the need for pump start-up and shutdown. A flushing pipe with a regulating valve (fourth part) connects the slurry delivery pipe and the air delivery pipe, controlling air delivery to the slurry delivery pipe on the side of the three-way valve away from the mixing tank. This blows the slurry from the drill bit out of the slurry delivery pipe on the side of the three-way valve away from the mixing tank and into the drill pipe. Because the slurry continuously flows through the slurry delivery pipe on the side of the three-way valve closest to the mixing tank, slurry solidification is prevented, thus improving the performance of the slurry delivery pipe.
[0012] Secondly, this invention utilizes three-way valves two and three-way valve three to transport water through the water delivery pipe to the drill rod, circulation pipe, or slurry delivery pipe away from the mixing tank via three-way valve one. This satisfies the requirement of delivering water to the drill rod for jet grouting operations and flushing residual slurry in the circulation pipe or slurry delivery pipe, allowing water to be added to the mixing tank through the circulation pipe. Furthermore, this invention uses a one-way valve one on the air delivery pipe to prevent the medium transported in the air delivery pipe from flowing back to the air compressor. An air filter is also included to filter the air entering the air delivery pipe, preventing particulate impurities from the outside air from entering the air compressor and thus protecting the air compressor.
[0013] Furthermore, this invention utilizes a heat exchanger installed on the air delivery pipe to increase the internal energy of the compressed air generated by the air compressor, thereby reducing the impact of air on slurry solidification. A gas buffer tank temporarily stores the high-pressure air generated by the air compressor, and the input and output of the gas buffer tank are controlled by regulating valve five and shut-off valve one. Moreover, the invention employs check valves two and three to prevent the medium transported in the slurry delivery pipe from flowing back into the mixing tank, and to prevent the medium transported in the water delivery pipe from flowing back into the booster pump, ensuring supply safety. The water filter and shut-off valve two not only control the opening and closing of the water delivery but also filter the water entering the water delivery pipe, reducing physical damage to the booster pump caused by particle impact and improving the booster pump's durability. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation
[0015] like Figure 1As shown, a high-pressure jet grouting pile supply system includes a high-pressure jet grouting pile 2 equipped with a drill rod 1. The drill rod 1 has a hollow tubular structure, with a drill bit at its bottom end and a nozzle at its top. The nozzle is connected to the inner cavity of the drill rod 1. By supplying slurry, water, and air to the drill rod 1, the slurry, water, and air are ejected through the nozzle to complete the jet grouting operation. The drill rod 1 is respectively equipped with a slurry delivery pipe 3, an air delivery pipe 4, and a water delivery pipe 5, which are connected to the drill rod 1 to deliver slurry, water, and air into the inner cavity of the drill rod 1. The slurry delivery pipe 3 extends away from the drill rod. In the direction of drill pipe 1, a regulating valve 6, a pressure sensor 7, a three-way valve 8, and a mud pump 9 are sequentially installed. The mud pump 9 controls the delivery pressure of the slurry delivery pipe 3, the pressure sensor 7 monitors the delivery pressure of the slurry delivery pipe 3, and the regulating valve 6 controls the delivery flow rate of the slurry delivery pipe 3, so as to grasp and control the delivery information of the slurry delivery pipe 3. In the direction away from drill pipe 1, an air delivery pipe 4 is sequentially installed with a regulating valve 10, a pressure sensor 11, and an air compressor 12. The air compressor 12 is used to pressurize the air, and the pressure sensor 11 monitors the delivery pressure of the air delivery pipe 4, and the regulating valve 10 controls the air delivery flow rate. The air delivery pipe 4 is used to monitor and control its delivery information by controlling the flow rate. The water delivery pipe 5, along the direction away from the drill pipe 1, is equipped with a pressure sensor 13, a regulating valve 14, and a booster pump 15. The booster pump 15 pressurizes the water. The regulating valve 14 controls the flow rate of the water delivery pipe 5, and the pressure sensor 13 monitors the delivery pressure, thus controlling the delivery information of the water delivery pipe 5. A mixing tank 16 is installed at the end of the slurry delivery pipe 3 away from the drill pipe 1. The mixing tank 16 agitates the slurry, ensuring uniformity and preventing segregation. The phenomenon is that the input end of the three-way valve 8 is connected to the bottom end of the mixing tank 16 through the mud pump 9. The bottom end of the mixing tank 16 is equipped with a valve, and the slurry delivery pipe 3 is connected to the mixing tank 16 through the valve to control the discharge of the mixing tank 16. The first output end of the three-way valve 8 is connected to the pressure sensor 7. A circulation pipe 17 is provided between the mixing tank 16 and the three-way valve 8. The two ends of the circulation pipe 17 are respectively connected to the second output end of the three-way valve 8 and the top end of the mixing tank 16. By controlling the three-way valve 8, the slurry output by the mud pump 9 is transported back to the mixing tank 16 or to the drill pipe 1 to reduce the start and stop of the mud pump 9.A flushing pipe 18 is provided between the slurry delivery pipe 3 and the air delivery pipe 4. The slurry delivery pipe 3 between the three-way valve 10 and the pressure sensor 7, and the air delivery pipe 4 between the pressure sensor 21 and the air compressor 12 are respectively connected to both ends of the flushing pipe 18. A regulating valve 4 19 is provided on the flushing pipe 18. By controlling the regulating valve 2 10 and the regulating valve 4 19, air can be directly delivered to the drill rod 1 or delivered to the drill rod 1 through the flushing pipe 18 and the slurry delivery pipe 3 on the side away from the mixing tank 16 via the three-way valve 18. This allows the slurry delivered in the slurry delivery pipe 3 on the side away from the mixing tank 16 via the three-way valve 18 and the drill rod 1 to be blown out of the drill bit, while the slurry delivery pipe 3 on the side closer to the mixing tank 16 via the three-way valve 18 continues to flow, preventing the slurry in the slurry delivery pipe 3 from solidifying, thereby improving the performance of the slurry delivery pipe 3.
[0016] In this embodiment, a three-way valve 20 is provided between the pressure sensor 313 and the regulating valve 314. The three-way valve 20 is installed on the water delivery pipe 5. The input end of the three-way valve 20 is connected to the regulating valve 314, and the first output end of the three-way valve 18 is connected to the pressure sensor 313. A three-way valve 21 is provided on one side of the three-way valve 20. The input end of the three-way valve 21 is connected to the second output end of the three-way valve 20, and the first output end of the three-way valve 21 is connected to the circulation pipe 17. The second output end of the three-way valve 21 and the three-way valve 20 are connected to the regulating valve 14. The slurry delivery pipe 3 between the first valve 8 and the pressure sensor 7 is connected. The second three-way valve 20 is used to control the water to be delivered to the drill pipe 1 through the water delivery pipe 5 or to the third three-way valve 21. The third three-way valve 21 is used to deliver the water to the circulation pipe 17 or the slurry delivery pipe 3 away from the mixing tank 16 by the third three-way valve 8, so as to flush the residual slurry in the circulation pipe 17 or the slurry delivery pipe 3, avoid the residual slurry from solidifying on the circulation pipe 17 or the slurry delivery pipe 3, and facilitate the addition of water to the mixing tank 16 through the circulation pipe 17.
[0017] It should be noted that a one-way valve 22 is provided on the air delivery pipe 4 between the flushing pipe 18 and the air compressor 12. The input end of the one-way valve 22 faces the air compressor 12, so that the medium transported in the air delivery pipe 4 flows back into the air compressor 12 in the reverse direction. An air filter 23 is provided on the air delivery pipe 4 away from the one-way valve 22 of the air compressor 12, so as to filter the air entering the air delivery pipe 4.
[0018] Specifically, the air delivery pipe 4 is sequentially equipped with a heat exchanger 24, a regulating valve 25, a gas buffer tank 26, and a shut-off valve 27 along the direction from the air compressor 12 to the one-way valve 22. The heat exchanger 24, regulating valve 25, gas buffer tank 26, and shut-off valve 27 are all located between the air compressor 12 and the one-way valve 22. The air entering the air delivery pipe 4 is compressed by the air compressor 12 and then enters the heat source channel of the heat exchanger 24 and the cold source medium continuously supplied to the cold source channel of the heat exchanger 24 for countercurrent heat exchange. This absorbs the increase in internal energy of the compressed air caused by the work done by the air compressor 12, thereby reducing the temperature of the high-pressure air after compression by the air compressor 12 to within a preset range. The high-pressure air generated by the air compressor 12 is temporarily stored in the gas buffer tank 26 to form a high-pressure air source for the air channel of the drill rod 1. The flow rate of the temporarily stored air is controlled by controlling the opening of the regulating valve 25, and the gas buffer tank 26 is controlled to discharge by controlling the opening and closing of the shut-off valve 27.
[0019] In this embodiment, a check valve 28 is provided between the mud pump 9 and the three-way valve 8. The output end of the check valve 28 faces the three-way valve 8 to prevent the medium transported in the slurry conveying pipe 3 from flowing back into the mixing tank 16. A check valve 29 is provided between the regulating valve 14 and the booster pump 15. The output end of the check valve 29 faces the regulating valve 14 to prevent the medium transported in the water conveying pipe 5 from flowing back into the booster pump 15.
[0020] Specifically, the water delivery pipe 5 is provided with a water filter 30 and a shut-off valve 31 in sequence along the direction from the regulating valve 3 14 to the booster pump 15. The water filter 30 and the shut-off valve 31 are located on the side of the booster pump 15 away from the regulating valve 3 14. The shut-off valve 31 is the master control switch of the water delivery pipe 5, used to control the opening or closing of the water delivery. The water entering the water delivery pipe 5 is filtered by the water filter 30, which reduces the physical damage to the booster pump 15 caused by the impact of particulate matter and improves the durability of the booster pump 15.
[0021] The instructions for using this product are as follows: Figure 1As shown, according to the requirements of using the triple-tube high-pressure jet grouting pile 2, high-pressure mortar is supplied through the grout delivery pipe 3, high-pressure air is supplied through the air delivery pipe 4, and high-pressure water is supplied through the water delivery pipe 5. The process of supplying high-pressure mortar through the grout delivery pipe 33 is as follows: the grout is continuously stirred using the mixing tank 16, and the grout is pressurized by the mud pump 9. The input end of the three-way valve 8 and the first output end of the three-way valve 8 are connected by controlling the connection, and the opening of the regulating valve 6 is controlled according to the pressure value fed back by the pressure sensor 7, so that the grout is transmitted to the drill rod 1 through the grout delivery pipe 3. The process of supplying high-pressure air through air delivery pipe 4 is as follows: Outside air is filtered through air filter 23 and then pressurized by air compressor 6 to form compressed air, which is then sent to the heat source channel of heat exchanger 24 and continuously supplied with cold source air to the cold source channel of heat exchanger 24 for counter-current heat exchange. The compressed air after passing through the heat source channel of heat exchanger 24 is sent to gas buffer tank 26 to form a high-pressure air source. Then, the opening of shut-off valve 1 27 and the opening of regulating valve 2 10 are adjusted to allow air to be delivered into drill pipe 1. The process of supplying high-pressure water through water delivery pipe 5 is as follows: The water source is filtered through water filter 30 and then pressurized by booster pump 15 in operation. The opening of regulating valve 3 14 is adjusted to control the input and first output of three-way valve 20, allowing water to be delivered into drill pipe 1 to meet the needs of the triple-tube high-pressure jet grouting pile 2.
[0022] After grouting of drill pipe 1 is completed, the three-way valve 8 is adjusted to connect its input and output ends, allowing the slurry pressurized by mud pump 9 to be transported back to mixing tank 16 via circulation pipe 17. The booster pump 15 and shut-off valve 31 are then shut off to stop the water supply. The openings of regulating valves 10 and 19 are adjusted to allow air to be supplied to the slurry delivery pipe 3 on the side of three-way valve 8 away from mixing tank 16, thus blowing the slurry delivered to the drill bit from the slurry delivery pipe 3 and drill pipe 1. If water is needed to flush circulation pipe 17 and slurry delivery pipe 3, the three-way valve 20 is first adjusted to connect its input and output ends, and then the three-way valve 21 is adjusted to flush circulation pipe 17 and slurry delivery pipe 3 with water.
[0023] In this embodiment, the mud pump 9, air compressor 12, and booster pump 15 are used to pressurize the slurry delivery pipe 3, air delivery pipe 4, and water delivery pipe 5, respectively. The pressure sensors 7, 11, and 13 are used to monitor the pressure information of the slurry delivery pipe 3, air delivery pipe 4, and water delivery pipe 5, respectively. The flow rates of the slurry delivery pipe 3, air delivery pipe 4, and water delivery pipe 5 are controlled by the regulating valves 6, 10, and 14, respectively, so as to make adjustments according to the requirements of the shotcrete operation. Furthermore, this invention, through the mixing tank 16, can continuously stir the slurry, making the slurry uniform and preventing segregation. Through the three-way valve 8, the slurry output by the mud pump 9 can be controlled to be transported back to the mixing tank 16 through the circulation pipe 17 or to the drill pipe 1 through the slurry delivery pipe 3, thereby reducing the start-up and shutdown of the mud pump 9. Through the flushing pipe 18 with the regulating valve 4 19 set between the slurry delivery pipe 3 and the air delivery pipe 4, air can be controlled to be delivered to the slurry delivery pipe 3 on the side of the three-way valve 8 away from the mixing tank 16, thereby blowing the slurry delivered in the slurry delivery pipe 3 and the drill pipe 1 on the side of the three-way valve 8 away from the mixing tank 16 out of the drill bit. Since the slurry is continuously flowing in the slurry delivery pipe 3 on the side of the three-way valve 8 near the mixing tank 16, the solidification of the slurry in the slurry delivery pipe 3 is avoided, thereby improving the performance of the slurry delivery pipe 3.
[0024] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.
Claims
1. A supply system for high-pressure jet grouting piles, comprising high-pressure jet grouting piles (2) equipped with drill rods (1), characterized in that: The drill pipe (1) is provided with a slurry delivery pipe (3), an air delivery pipe (4), and a water delivery pipe (5). The slurry delivery pipe (3) is provided with a regulating valve (6), a pressure sensor (7), a three-way valve (8), and a mud pump (9) in sequence along the direction away from the drill pipe (1). The air delivery pipe (4) is provided with a regulating valve (10), a pressure sensor (11), and an air compressor (12) in sequence along the direction away from the drill pipe (1). The water delivery pipe (5) is provided with a pressure sensor (13), a regulating valve (14), and a booster pump (15) in sequence along the direction away from the drill pipe (1). The end of the slurry delivery pipe (3) away from the drill pipe (1) is provided with a mixing tank (16). The input end of the three-way valve (8) is... The bottom of the mixing tank (16) is connected to the mud pump (9), the first output end of the three-way valve (8) is connected to the pressure sensor (7), a circulation pipe (17) is provided between the mixing tank (16) and the three-way valve (8), and the two ends of the circulation pipe (17) are respectively connected to the second output end of the three-way valve (8) and the top of the mixing tank (16); a flushing pipe (18) is provided between the slurry conveying pipe (3) and the air conveying pipe (4), the slurry conveying pipe (3) between the three-way valve (8) and the pressure sensor (7) and the air conveying pipe (4) between the pressure sensor (2) and the air compressor (12) are respectively connected to the two ends of the flushing pipe (18), and a regulating valve (4) is provided on the flushing pipe (18).
2. The supply system for high-pressure jet grouting piles according to claim 1, characterized in that: A three-way valve two (20) is provided between the pressure sensor three (13) and the regulating valve three (14). The three-way valve two (20) is installed on the water delivery pipe (5). The input end of the three-way valve two (20) is connected to the regulating valve three (14). The first output end of the three-way valve one (8) is connected to the pressure sensor three (13). A three-way valve three (21) is provided on one side of the three-way valve two (20). The input end of the three-way valve three (21) is connected to the second output end of the three-way valve two (20). The first output end of the three-way valve three (21) is connected to the circulation pipe (17). The slurry delivery pipe (3) between the three-way valve one (8) and the pressure sensor one (7) is connected to the second output end of the three-way valve three (21).
3. The supply system for high-pressure jet grouting piles according to claim 1, characterized in that: A one-way valve (22) is provided on the air supply pipe (4) between the flushing pipe (18) and the air compressor (12). The input end of the one-way valve (22) faces the air compressor (12). An air filter (23) is provided on the air supply pipe (4) of the air compressor (12) away from the one-way valve (22).
4. The supply system for high-pressure jet grouting piles according to claim 3, characterized in that: The air delivery pipe (4) is provided with a heat exchanger (24), a regulating valve (5) (25), a gas buffer tank (26) and a shut-off valve (27) in sequence along the direction from the air compressor (12) to the one-way valve (22). The heat exchanger (24), the regulating valve (5) (25), the gas buffer tank (26) and the shut-off valve (27) are all located between the air compressor (12) and the one-way valve (22).
5. The supply system for high-pressure jet grouting piles according to claim 1, characterized in that: A check valve 2 (28) is provided between the mud pump (9) and the three-way valve 1 (8), with the output end of the check valve 2 (28) facing the three-way valve 1 (8). A check valve 3 (29) is provided between the regulating valve 3 (14) and the booster pump (15), with the output end of the check valve 3 (29) facing the regulating valve 3 (14).
6. The supply system for high-pressure jet grouting piles according to claim 1, characterized in that: The water delivery pipe (5) is provided with a water filter (30) and a shut-off valve (31) in sequence along the direction from the regulating valve (14) to the booster pump (15). The water filter (30) and the shut-off valve (31) are located on the side of the booster pump (15) away from the regulating valve (14).