Cement paste preparation device for high-pressure jet grouting pile construction

Abstract

The utility model discloses a cement paste preparation device for high-pressure jet grouting pile construction, which belongs to the field of products related to jet grouting pile construction and comprises a main box body and a stirring device arranged in the main box body. The main box body is provided with a feed port and a discharge port, a mixing cylinder is arranged in the main box body, and the mixing cylinder is provided with an inlet corresponding to the feed port of the main box body and an outlet corresponding to the discharge port of the main box body; a sealing plate is arranged at a feeding port of the main box body, a lifting mechanism for driving the sealing plate to ascend and descend is arranged on the outer wall of the main box body, and the stirring device is installed on the sealing plate and synchronously ascends and descends along with the sealing plate. The stirring device comprises a second motor arranged on the outer side of the sealing plate and a stirring piece connected with the second motor and used for stretching into the mixing barrel. The device has the advantages that mud is not prone to splashing, and the inner wall of the device is convenient to clean.

Description

Technical Field

[0001] The utility model relates to the field of products related to jet grouting pile construction, in particular to a device for preparing cement slurry for high-pressure jet grouting pile construction. Background Technique

[0002] High-pressure jetting is a new soil reinforcement technology developed in the past decade. It uses a jet grouting rig to place the jet grouting pipe at the expected depth of foundation reinforcement treatment. When the drill pipe rotates and slowly rises, the pre-prepared slurry is sprayed out from the nozzle with a certain pressure to impact the soil, stir the slurry into a mixture and then coagulate and consolidate, and jointly act with the soil between the piles and the cushion layer to form a composite foundation with a certain strength;

[0003] At present, the existing slurry preparation devices are prone to slurry splashing during the preparation and mixing operations, and the materials adhered to the inner wall of the device are also not easy to clean, which easily leads to material waste and has defects. Content of the Utility Model

[0004] The utility model provides a device for preparing cement slurry for high-pressure jet grouting pile construction, so as to solve the technical problems that the existing slurry preparation device is prone to slurry splashing during the preparation and mixing operations, and the materials adhered to the inner wall of the device are not easy to clean.

[0005] According to one aspect of the utility model, a device for preparing cement slurry for high-pressure jet grouting pile construction is provided, which includes a main box body and a stirring device arranged in the main box body; the main box body has a feed inlet and a discharge outlet, a mixing cylinder is arranged in the main box body, and the mixing cylinder has an inlet corresponding to the feed inlet of the main box body and an outlet corresponding to the discharge outlet of the main box body; a sealing plate is arranged at the feed inlet of the main box body, a lifting mechanism for driving the sealing plate to lift is arranged on the outer wall of the main box body, the stirring device is installed on the sealing plate and lifts synchronously with the sealing plate, and the stirring device includes a second motor arranged outside the sealing plate and a stirring member connected to the second motor for extending into the mixing cylinder.

[0006] Optionally, the stirring member includes a rotating rod coaxially connected to the output end of the second motor, the rotating rod is arranged at the center of the mixing cylinder, and a plurality of stirring rods are vertically connected to the rotating rod, and the stirring rods are symmetrically distributed on both sides of the rotating rod.

[0007] Optionally, the lifting mechanism includes a first motor and a lead screw connected to the output end of the first motor, the lead screw is arranged parallel to the axis of the mixing cylinder, a traction plate is threadedly connected to the lead screw, and the traction plate is fixedly connected to the sealing plate.

[0008] Optionally, a guiding groove is axially opened on the main box body, and a guiding plate slidably matched with the guiding groove is arranged on the sealing plate.

[0009] Optionally, the guide plate and the guide groove are arranged in an arc surface, and the axes of the guide plate and the guide groove coincide with the axis of the mixing cylinder.

[0010] Optionally, scraping plates that fit the inner wall of the mixing cylinder are arranged on both sides of the rotating rod. The two ends of the two scraping plates are fixedly connected through a support plate. The support plate is fixedly sleeved on the rotating rod, and the stirring rod is located between the two support plates.

[0011] Optionally, a discharge pipe is arranged at the discharge port of the main box body. A blanking hopper is arranged at the end of the discharge pipe, and the diameter of the blanking hopper gradually decreases from the end close to the main box body to the end far from the main box body.

[0012] Optionally, a baffle is rotatably connected to the outlet of the mixing cylinder. A third motor is fixedly connected to the bottom of the mixer. A swing plate fixedly connected to the baffle is arranged at the output end of the third motor, which is used to drive the baffle to swing to open or close the outlet of the mixing cylinder.

[0013] Optionally, the first motor, the second motor and the third motor are all servo motors.

[0014] Optionally, four support feet arranged in a rectangle are fixedly connected to the bottom of the main box body.

[0015] In summary, the present application includes at least one of the following beneficial technical effects:

[0016] 1. By providing a sealing plate and a lifting mechanism for driving the sealing plate to lift, the sealing plate can be lifted before introducing the raw materials and lowered before stirring, so that the materials during the stirring process will not splash. At the same time, the stirring mechanism is installed on the sealing plate and can lift synchronously with the sealing plate, which is convenient to lift the stirring mechanism after use to clean the inner wall of the mixing cylinder;

[0017] 2. By providing scraping plates on the stirring mechanism, during the process of stirring and mixing the cement slurry materials, the scraping plates can fit the inner wall of the mixing cylinder to scrape off the adhered materials, eliminating the need for manual cleaning.

[0018] In addition to the purposes, features and advantages described above, the present invention has other purposes, features and advantages. The following will refer to the drawings for a further detailed description of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0020] Figure 1Structural schematic diagram of a device for preparing cement slurry used in the construction of high-pressure jet grouting piles according to the present utility model;

[0021] Figure 2 Structural schematic diagram of a baffle of a device for preparing cement slurry used in the construction of high-pressure jet grouting piles according to the present utility model.

[0022] Legend description:

[0023] 1. Main box body; 2. Mixing cylinder; 3. Support plate; 4. First motor; 5. Lead screw; 6. Traction plate; 7. Sealing plate; 8. Second motor; 9. Rotating rod; 10. Stirring rod; 11. Scraper; 12. Support plate; 13. Discharge pipe; 14. Baffle; 15. Third motor; 16. Swing plate; 17. Hopper; 18. Limiting plate; 19. Support feet. Specific embodiments

[0024] The following further elaborates on the embodiments of the present utility model with reference to the accompanying drawings. However, the present utility model can be implemented in various different ways defined and covered by the following.

[0025] The following further elaborates on the present application with reference to the accompanying drawings Figure 1-2 for a further detailed description of the present application.

[0026] The embodiments of the present application disclose a device for preparing cement slurry used in the construction of high-pressure jet grouting piles.

[0027] Referring to Figure 1 , the device for preparing cement slurry used in the construction of high-pressure jet grouting piles includes a main box body 1 and a stirring device arranged inside the main box body 1; the main box body 1 has a feed inlet and a discharge outlet, a mixing cylinder 2 is arranged inside the main box body 1, and the mixing cylinder 2 has an inlet corresponding to the feed inlet of the main box body 1 and an outlet corresponding to the discharge outlet of the main box body 1; a sealing plate 7 is arranged at the feed inlet of the main box body 1, a lifting mechanism for driving the sealing plate 7 to lift and lower is arranged on the outer wall of the main box body 1, the stirring device is installed on the sealing plate 7 and lifts and lowers synchronously with the sealing plate 7, and the stirring device includes a second motor 8 arranged outside the sealing plate 7 and a stirring member connected to the second motor 8 for extending into the mixing cylinder 2. Before adding raw materials, the sealing plate 7 can rise to open the feed inlet, and after the raw materials are added, the sealing plate 7 descends to close the feed inlet, preventing the cement slurry from splashing during stirring and maintaining the cleanliness of the construction site. The stirring device is fixed on the sealing plate 7 and includes a second motor 8 and a directly connected stirring member, which extends into the mixing cylinder 2 for stirring. Such a design not only ensures the uniform stirring of the cement slurry, improves the construction quality, but also reduces manual operation through automatic control, improves work efficiency and safety. At the same time, the liftable characteristic of the stirring mechanism is also convenient for the later cleaning and maintenance of the equipment.

[0028] The stirring member includes a rotating rod 9 coaxially connected to the output end of the second motor 8. The rotating rod 9 is disposed at the center of the mixing cylinder 2. A plurality of stirring rods 10 are vertically connected to the rotating rod 9, and the stirring rods 10 are symmetrically distributed on both sides of the rotating rod 9. During use, after the second motor 8 is started, the rotating rod 9 is driven to rotate by its output end. The rotation of the rotating rod 9 further drives all the vertically connected stirring rods 10 to rotate synchronously. Such a layout enables the stirring rods 10 to stir the cement slurry in the mixing cylinder 2 evenly and effectively, ensuring the uniform mixing of the slurry and preventing material deposition. In addition, the symmetrical distribution of the stirring rods 10 helps to maintain the balance and stability of the equipment and improve the stirring efficiency. The main function of this setting is to improve the stirring effect of the cement slurry, reduce the adhesion of materials to the inner wall of the mixing cylinder 2, thereby ensuring the stirring quality. At the same time, it also simplifies the cleaning and maintenance process, improving the construction efficiency and safety.

[0029] The lifting mechanism includes a first motor 4 and a lead screw 5 connected to the output end of the first motor 4. The lead screw 5 is arranged parallel to the axis of the mixing cylinder 2. A traction plate 6 is threadedly connected to the lead screw 5, and the traction plate 6 is fixedly connected to the sealing plate 7. During operation, when the first motor 4 is started, it drives the lead screw 5 to rotate. Through the threaded action, the traction plate 6 moves up and down along the lead screw 5. This movement directly causes the sealing plate 7 fixedly connected to the traction plate 6 to rise or fall, realizing the opening or closing of the feed inlet of the main box body 1. The main function of this design is to open the feed inlet by raising the sealing plate 7 before adding raw materials, and close the feed inlet by lowering the sealing plate 7 after the raw materials are added. This can effectively prevent the splashing of materials during the stirring process, keep the construction site clean and enhance the safety of operation.

[0030] A guiding groove is axially formed on the main box body 1, and a guiding plate slidably engaged with the guiding groove is provided on the sealing plate 7. When the lifting mechanism drives the sealing plate 7 to rise or fall through the first motor 4 and the lead screw 5, the guiding plate on the sealing plate 7 will slide along the guiding groove on the main box body 1, ensuring that the moving direction of the sealing plate 7 remains accurate and stable. The main function of this setting is to prevent the sealing plate 7 from deflecting or jamming during the vertical movement, improving the accuracy and reliability of the mechanical operation.

[0031] The guiding plate and the guiding groove are arranged in an arc surface, and the axes of the guiding plate and the guiding groove coincide with the axis of the mixing cylinder 2. When the first motor 4 is started and drives the lead screw 5 to rotate, through the interaction between the lead screw 5 and the traction plate 6, the traction plate 6 further pushes the sealing plate 7 to rise or fall along the arc surface in the guiding groove. Such an arc-shaped guiding groove and the matching guiding plate not only ensure the smooth movement of the sealing plate 7 without deviating from the predetermined path, but also, due to the coincidence of the axes, maintain the accurate alignment of the sealing plate 7 with the inlet of the mixing cylinder 2. The function of this design is to enhance the operation accuracy and reliability of the entire equipment, avoid the swinging or tilting of the sealing plate 7 during movement, and thus ensure the stability and efficiency during the stirring and slurry conveying processes.

[0032] Scrapers 11 that fit against the inner wall of the mixing cylinder 2 are provided on both sides of the rotating rod 9. The two ends of the two scrapers 11 are fixedly connected by support plates 12. The support plates 12 are fixedly sleeved on the rotating rod 9. The stirring rod 10 is located between the two support plates 12. When the second motor 8 drives the rotating rod 9 to rotate, the scrapers 11 rotate closely against the inner wall of the mixing cylinder 2, effectively scraping off the cement slurry adhering to the inner wall. The setting of the scrapers 11 not only ensures the cleanliness of the inner wall of the mixing cylinder 2, prevents the cement slurry from solidifying and adhering, but also ensures the uniform mixing of the cement slurry, avoiding the aggregation and solidification of the materials during the mixing process. In addition, the design of the support plates 12 maintains the stability and uniform stress of the scrapers 11, enhancing the durability and mixing efficiency of the equipment.

[0033] A discharge pipe 13 is provided at the discharge port of the main box body 1. A hopper 17 is provided at the end of the discharge pipe 13. The diameter of the hopper 17 gradually decreases from the end close to the main box body 1 to the end far from the main box body 1. The working mechanism of this design mainly controls and guides the cement slurry to flow out of the mixing cylinder 2 evenly and smoothly through the tapered shape of the hopper 17, avoiding blockage or overflow during the discharging process. The specific setting includes a conical or funnel-shaped hopper 17 connected to the discharge port. It not only helps to gather the mixed cement slurry, but also, due to its gradually decreasing diameter, can effectively accelerate the discharging speed of the cement slurry, and at the same time helps to eliminate possible bubbles or uneven mixing problems.

[0034] The first motor 4, the second motor 8 and the third motor 15 are all servo motors. Four support feet 19 arranged in a rectangle are fixedly connected to the bottom of the main box body 1. Due to its precise speed and position control characteristics, the servo motor can ensure that each action in the device (such as lifting the sealing plate 7, driving the stirring rod 10, controlling the discharge swing plate 16) can be executed in a very precise and repeatable manner, which is crucial for ensuring the quality and uniformity of the cement slurry. At the same time, the four support feet 19 at the bottom of the main box body 1 form a stable base, ensuring that the entire device remains stable during operation, preventing misoperation or damage caused by mechanical vibration or external influence. The rectangular layout of the support feet 19 further improves the anti-tilting ability of the overall structure, enabling the device to work safely and stably even on uneven ground.

[0035] Refer to Figure 1 and Figure 2, a baffle 14 is rotatably connected to the outlet of the mixing cylinder 2. A third motor 15 is fixedly connected to the bottom of the mixing cylinder 2. An oscillating plate 16 fixedly connected to the baffle 14 is provided at the output end of the third motor 15, which is used to drive the baffle 14 to swing to open or close the outlet of the mixing cylinder 2. The third motor 15 drives the oscillating plate 16 to swing at a certain angle through its rotational movement, so as to realize the opening and closing control of the outlet of the mixing cylinder 2. During specific operation, when it is necessary to discharge the mixed cement slurry, the third motor 15 is activated to make the oscillating plate 16 swing from the closed position to the open position, allowing the cement slurry to flow out; after the discharging is completed, the third motor 15 drives the oscillating plate 16 to return to the closed position again to prevent more materials from flowing out, ensuring the accuracy and leak-free of the operation. The main function of this design is to provide an accurate and controllable way to manage the material output of the mixing cylinder 2, enhancing the automation level of the equipment. By accurately controlling the swing of the oscillating plate 16 by the motor, the smooth discharge of the cement slurry can be ensured, and the outlet can be quickly closed when needed to avoid overflow or waste.

[0036] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cement slurry preparation device for high-pressure jet grouting pile construction, characterized in that: It comprises a main box body (1) and a stirring device arranged in the main box body (1); The main box (1) has a feed inlet and a discharge outlet, and a mixing drum (2) is arranged inside the main box (1), and the mixing drum (2) has an inlet corresponding to the feed inlet of the main box (1) and an outlet corresponding to the discharge outlet of the main box (1); The feed inlet of the main box (1) is provided with a sealing plate (7), the outer wall of the main box (1) is provided with a lifting mechanism for driving the sealing plate (7) to rise and fall, the stirring device is mounted on the sealing plate (7) and rises and falls synchronously with the sealing plate (7), and the stirring device comprises a second motor (8) arranged on the outside of the sealing plate (7) and a stirring member connected to the second motor (8) and used to extend into the mixing barrel (2).

2. The cement slurry preparation device for high-pressure jet grouting pile construction according to claim 1 is characterized in that: The stirring member comprises a rotating rod (9) coaxially connected to the output end of the second motor (8), the rotating rod (9) being arranged at the center of the mixing barrel (2), and a plurality of stirring rods (10) being vertically connected to the rotating rod (9), the stirring rods (10) being symmetrically distributed on both sides of the rotating rod (9).

3. The cement slurry preparation device for high-pressure jet grouting pile construction according to claim 2 is characterized in that: The lifting mechanism comprises a first motor (4) and a screw rod (5) connected to the output end of the first motor (4); the screw rod (5) is arranged parallel to the axis of the mixing barrel (2); a traction plate (6) is threadedly connected to the screw rod (5); and the traction plate (6) is fixedly connected to a sealing plate (7).

4. The cement slurry preparation device for high-pressure jet grouting pile construction according to claim 1 is characterized in that: The main box body (1) is provided with a guide groove along the axial direction, and the sealing plate (7) is provided with a guide plate that is slidably matched with the guide groove.

5. The cement slurry preparation device for high-pressure jet grouting pile construction according to claim 4 is characterized in that: The guide plate and the guide groove are arranged in the form of arc surfaces, and the axes of the guide plate and the guide groove coincide with the axis of the mixing barrel (2).

6. The cement slurry preparation device for high-pressure jet grouting pile construction according to claim 2, characterized in that: Scrapers (11) are provided on both sides of the rotating rod (9) and are in contact with the inner wall of the mixing barrel (2). The two ends of the scrapers (11) are fixedly connected by a support plate (12). The support plate (12) is fixedly sleeved on the rotating rod (9). The stirring rod (10) is located between the two support plates (12).

7. The cement slurry preparation device for high-pressure jet grouting pile construction according to claim 6, characterized in that: The discharge port of the main box (1) is provided with a discharge pipe (13), and the end of the discharge pipe (13) is provided with a drop hopper (17), and the diameter of the drop hopper (17) gradually decreases from an end close to the main box (1) to an end away from the main box (1).

8. The cement slurry preparation device for high-pressure jet grouting pile construction according to claim 3 is characterized by: The outlet of the mixing drum (2) is rotatably connected to a baffle (14), the bottom of the mixing drum (2) is fixedly connected to a third motor (15), and the output end of the third motor (15) is provided with a swing plate (16) fixedly connected to the baffle (14) for driving the baffle (14) to swing so as to open or close the outlet of the mixing drum (2).

9. The cement slurry preparation device for high-pressure jet grouting pile construction according to claim 8, characterized in that: The first motor (4), the second motor (8) and the third motor (15) are all servo motors.

10. The cement slurry preparation device for high-pressure jet grouting pile construction according to claim 9, characterized in that: Four supporting legs (19) arranged in a rectangular shape are fixedly connected to the bottom of the main box body (1).

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