A slurry conversion device for a soil pressure balanced pipe jacking

Abstract

The application provides a slurry conversion device for earth pressure balance pipe jacking for municipal engineering, which comprises a cavity, a earthwork feeding port is arranged at the top of the cavity, two first driving shafts are symmetrically arranged below the earthwork feeding port, eccentric rollers are installed on the first driving shafts, conical flow guide plates are installed below the first driving shafts, two second driving shafts are symmetrically arranged below the center openings of the conical flow guide plates, concentric rollers are installed on the second driving shafts, a plurality of high-pressure water spray pipes are installed on the bottom surface of the conical flow guide plates, and a stirrer is installed at the bottom of the cavity. The application improves the defects of the prior art, effectively pulverizes the earthwork through two-stage crushing of the eccentric rollers and the concentric rollers, fully mixes the water and the earthwork under the stirring of the stirrer, forms slurry, and does not easily cause blockage in the whole treatment process, thereby improving the treatment efficiency of the slurry conversion device.

Description

Technical fields:

[0001] This invention belongs to the field of earthwork construction technology and relates to an earthwork construction equipment, specifically a slurry-water conversion device for earth pressure balance pipe jacking in municipal engineering. Background technology:

[0002] Pipe jacking machines are trenchless earthmoving equipment that cuts soil with a cutterhead, then transports the cut soil using a auger and transport vehicles. This method of soil transportation is inefficient and costly. Chinese invention patent application 201010618350.6 discloses a slurry conversion device for earth pressure balance pipe jacking, which combines earth pressure balance with slurry fluid transportation to convert soil into slurry and discharge it through pipelines, thus improving soil transportation efficiency. However, this slurry conversion device is not efficient in handling large chunks of hard soil and is prone to jamming at the feed end. Therefore, this invention provides a slurry conversion device for earth pressure balance pipe jacking in municipal engineering to solve the above problems. Summary of the Invention:

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a slurry-water conversion device for earth pressure balance pipe jacking in municipal engineering, which can solve the deficiencies of existing technologies and improve the processing efficiency of the slurry-water conversion device.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A slurry conversion device for earth pressure balance pipe jacking in municipal engineering includes a cavity. A soil inlet is located at the top of the cavity. Two first drive shafts are symmetrically arranged below the soil inlet, and eccentric rollers are mounted on the first drive shafts. A conical guide plate is installed below the first drive shafts. Two second drive shafts are symmetrically arranged below the central opening of the conical guide plate, and concentric rollers are mounted on the second drive shafts. A stirrer is installed at the bottom of the cavity.

[0006] Preferably, the bottom surface of the conical guide plate is equipped with several high-pressure water spray pipes.

[0007] Preferably, the surface of the eccentric roller is provided with a plurality of annular racks, and the annular racks on the two eccentric rollers are arranged alternately.

[0008] Preferably, the annular rack has several mounting holes on both sides, and a first rotating shaft is mounted in the mounting holes by a torsion spring, and a first stirring paddle is mounted on the first rotating shaft.

[0009] Preferably, a universal ball joint is installed in the mounting hole, and the first rotating shaft is installed on the universal ball joint.

[0010] Preferably, a flexible washer is installed on the outer end of the mounting hole, and the first rotating shaft is interference-fitted with the flexible washer.

[0011] Preferably, the surface of the concentric roller is uniformly provided with a plurality of crushing cones, and the bottom of the crushing cones is provided with a metal mesh layer.

[0012] Preferably, the surface of the concentric roller is provided with a plurality of high-pressure water nozzles, which are located within the metal mesh layer.

[0013] Preferably, the stirrer includes a second rotating shaft, on which a plurality of second stirring blades are mounted. Each second stirring blade has a plurality of guide grooves. The guide grooves on the same second stirring blade are parallel to each other, and the guide grooves on different second stirring blades have different angles with the axis of the second stirring blade they are on.

[0014] The beneficial effects of this invention are:

[0015] (1) The present invention effectively crushes soil by two-stage crushing with eccentric rollers and concentric rollers. Under the agitation of the mixer, water and soil are fully mixed to form mud. The whole process is not prone to jamming and has high processing efficiency.

[0016] (2) The principle of this invention is clear and the structure is simple. It solves the problems of poor processing efficiency and easy jamming at the feed end of the existing technology for large blocks of hard soil. It is easy to operate and has strong practicality. Attached image description:

[0017] Figure 1 This is a structural diagram of a specific embodiment of the present invention;

[0018] Figure 2 This is an axial sectional view of a ring rack in a specific embodiment of the present invention;

[0019] Figure 3 This is a partial enlarged view of the surface of the concentric roller in a specific embodiment of the present invention;

[0020] Figure 4 This is a structural diagram of the guide groove on the second stirring paddle in a specific embodiment of the present invention;

[0021] The labels in the attached diagram are:

[0022] 1. Cavity; 2. Earthwork inlet; 3. First drive shaft; 4. Eccentric roller; 5. Conical guide plate; 6. Second drive shaft; 7. Concentric roller; 8. High-pressure water spray pipe; 9. Agitator; 10. Annular rack; 11. Mounting hole; 12. Torsion spring; 13. First rotating shaft; 14. First agitator; 15. Universal ball joint; 16. Metal mesh layer; 17. High-pressure water spray nozzle; 18. Second rotating shaft; 19. Second agitator; 20. Guide groove; 21. Flexible washer; 22. Crushing cone. Detailed implementation method:

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0024] Example 1

[0025] Reference Figure 1 This invention provides a slurry-water conversion device for earth pressure balance pipe jacking in municipal engineering, comprising a cavity 1, an earthwork inlet 2 at the top of the cavity 1, two first drive shafts 3 symmetrically arranged below the earthwork inlet 2, the two first drive shafts 3 being horizontally distributed and driven to rotate by a motor; an eccentric roller 4 is mounted on the first drive shaft 3; a conical guide plate 5 is mounted below the first drive shaft 3, two second drive shafts 6 symmetrically arranged below the central opening of the conical guide plate 5, the two second drive shafts 6 being horizontally distributed and driven to rotate by a motor, a concentric roller 7 is mounted on the second drive shaft 6, a plurality of high-pressure water spray pipes 8 are mounted on the bottom surface of the conical guide plate 5, and an agitator 9 is mounted at the bottom of the cavity 1. In this embodiment, stirring blades can be installed on the eccentric roller 4 and the concentric roller 7 to cooperate in stirring.

[0026] During application, the soil enters the cavity 1 through the soil inlet 2. The eccentric roller 4 rotates and initially crushes the soil. The initially crushed soil passes through the central opening below the conical guide plate 5 and is then further crushed by the concentric roller 7. At the same time, it is mixed with the water flow from the high-pressure water spray pipe 8. Finally, it is stirred by the agitator 9 to form a slurry.

[0027] Example 2

[0028] The main structure of this embodiment is the same as that of embodiment 1, except that:

[0029] Reference Figure 2In this embodiment, the surface of the eccentric roller 4 is provided with a plurality of annular racks 10, and the annular racks 10 on the two eccentric rollers 4 are arranged in an alternating pattern so that the rotation of the two eccentric rollers 4 does not affect each other; a plurality of mounting holes 11 are provided on both sides of the annular racks 10, and a first rotating shaft 13 is mounted in the mounting holes 11 by a torsion spring 12, and a first stirring paddle 14 is mounted on the first rotating shaft 13, which can break up the soil; a universal ball joint 15 is installed in the mounting holes 11, and the first rotating shaft 13 is mounted on the universal ball joint 15, which can move flexibly; a flexible washer 21 is installed on the outer end of the mounting hole 11, and the first rotating shaft 13 is interference-fitted with the flexible washer 21. The flexible washer 21 can prevent soil from entering the mounting hole 11 and does not affect the rotation of the first rotating shaft 13.

[0030] Example 3

[0031] The main structure of this embodiment is the same as that of embodiment 2, except that:

[0032] Reference Figure 3 In this embodiment, a plurality of crushing cones 22 are uniformly arranged on the surface of the concentric roller 7, and a metal mesh layer 16 is arranged at the bottom of the crushing cone 22. A plurality of high-pressure water nozzles 17 are arranged on the surface of the concentric roller 7, and the high-pressure water nozzles 17 are located within the metal mesh layer 16. The crushing cones 22 can further crush the soil and mix with the water flow sprayed from the high-pressure water nozzles 17 to complete the pre-impregnation of the soil.

[0033] Example 4

[0034] The main structure of this embodiment is the same as that of embodiment 3, except that the structure of the stirrer 9 is defined in this embodiment.

[0035] Specifically, refer to Figure 1 and Figure 4 In this embodiment, the stirrer 9 includes a second rotating shaft 18, on which a plurality of second stirring paddles 19 are mounted. Each second stirring paddle 19 has a plurality of guide grooves 20. The guide grooves 20 on the same second stirring paddle 19 are parallel to each other, and the angle between the guide grooves 20 on different second stirring paddles 19 and the axis of the second stirring paddle 19 on which they are located is different.

[0036] The application principle of this invention's device is as follows: The eccentric roller 4 performs initial crushing of the soil after feeding, followed by fine crushing and pre-impregnation using the concentric roller 7. Finally, the agitator 9 thoroughly mixes the crushed soil with water to form a slurry. The entire process is less prone to jamming and has high processing efficiency. The motors driving the eccentric roller, concentric roller, and agitator, as well as the slurry discharge pipes and pumps connected to the outside of the device, are all common knowledge in the art and are not shown in this invention.

[0037] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A slurry-water conversion device for earth pressure balance pipe jacking in municipal engineering, characterized in that, Includes a cavity (1), characterized in that: The cavity (1) is provided with a soil inlet (2) at the top, and two first drive shafts (3) are symmetrically arranged below the soil inlet (2). An eccentric roller (4) is installed on the first drive shaft (3). A conical guide plate (5) is installed below the first drive shaft (3). Two second drive shafts (6) are symmetrically arranged below the central opening of the conical guide plate (5). A concentric roller (7) is installed on the second drive shaft (6). A stirrer (9) is installed at the bottom of the cavity (1). The surface of the eccentric roller (4) is provided with several annular racks (10), and the annular racks (10) on the two eccentric rollers (4) are arranged in an alternating pattern; several mounting holes (11) are provided on both sides of the annular racks (10), and a first rotating shaft (13) is installed in the mounting hole (11) through a torsion spring (12), and a first stirring paddle (14) is installed on the first rotating shaft (13); a universal ball joint (15) is installed in the mounting hole (11), and the first rotating shaft (13) is installed on the universal ball joint (15); a flexible washer (21) is installed on the outer end of the mounting hole (11), and the first rotating shaft (13) and the flexible washer (21) are interference-fitted; The stirrer (9) includes a second rotating shaft (18), on which a number of second stirring blades (19) are installed. Each second stirring blade (19) has a number of guide grooves (20). The guide grooves (20) on the same second stirring blade (19) are parallel to each other. The angle between the guide grooves (20) on different second stirring blades (19) and the axis of the second stirring blade (19) on which they are located is different.

2. The slurry-water conversion device for earth pressure balance pipe jacking in municipal engineering according to claim 1, characterized in that, Several high-pressure water spray pipes (8) are installed on the bottom surface of the conical guide plate (5).

3. The slurry-water conversion device for earth pressure balance pipe jacking in municipal engineering according to claim 1, characterized in that, The concentric roller (7) has a number of crushing cones (22) evenly arranged on its surface, and a metal mesh layer (16) is arranged at the bottom of the crushing cones (22).

4. The slurry-water conversion device for earth pressure balance pipe jacking in municipal engineering according to claim 3, characterized in that, The surface of the concentric roller (7) is provided with a number of high-pressure water nozzles (17), which are located inside the metal mesh layer (16).

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