A high-efficiency mixing device for engineering soil improvement

Abstract

The utility model relates to the field of soil treatment equipment, a kind of high-efficiency mixing device for engineering slag improvement, including the front crushing screening cavity and mixing cavity of upper and lower settings;The front crushing screening cavity includes the screen cloth and outer cover of inside and outside settings, at least two axial arrangement cross-shaped support members are fixed in screen cloth, the central part of cross-shaped support member is fixedly connected with rotating shaft, and adjacent cross-shaped support member is clamped with roller;The lower end of outer cover is provided with the discharge port of butt joint conduction with mixing cavity;Upper layer feeding port is arranged on outer cover;Mixing cavity is provided with lower layer feeding port;The top of mixing cavity is also provided with ash and wood ash feeding port for placing ash and wood ash and negative pressure dust removal interface for butt joint negative pressure dust removal device.The utility model can effectively crush large engineering slag and screen out impurities.The device is provided with ash and wood ash feeding port, which effectively controls the moisture content of material.

Description

Technical Field

[0001] This utility model relates to the technical field of soil treatment equipment, specifically a slag and soil mixing device. Background Technology

[0002] Subway tunnels, foundation excavation, and other engineering projects generate massive amounts of construction waste. This waste typically has complex composition, uneven particle size, and high moisture content, making its improvement a mainstream approach for resource utilization.

[0003] In the process of improving engineering waste soil, the mixing process is a key step, and its uniformity directly determines the performance and quality of the improved waste soil.

[0004] There is an urgent need for a treatment device that can adjust the moisture content of construction waste. Utility Model Content

[0005] In view of the problems existing in the prior art, this utility model provides a high-efficiency mixing device for the improvement of engineering waste soil, so as to solve at least one of the above technical problems.

[0006] To achieve the above objectives, this utility model provides a high-efficiency mixing device for improving engineering waste soil, characterized in that it includes a pre-crushing and screening chamber and a mixing chamber arranged at the top and bottom.

[0007] The pre-crushing and screening chamber includes an inner and outer screen and an outer cover. At least two axially arranged cross-shaped support members are fixed inside the screen. The center of the cross-shaped support member is fixedly connected to the rotating shaft. A roller is sandwiched between adjacent cross-shaped support members. The cross-section of the outer contour of the roller is rectangular. The distance between the outer edge of the roller and the inner wall of the screen is 3-5mm.

[0008] The lower end of the outer cover is provided with a discharge port that connects with and communicates with the mixing chamber;

[0009] The outer cover is provided with an upper feeding port, which is connected to the screen.

[0010] The mixing chamber is provided with a lower feeding port, and a rotating shaft is provided inside the mixing chamber, on which a stirring blade is installed;

[0011] The top of the mixing chamber is also provided with a wood ash inlet for adding wood ash and a negative pressure dust removal interface for connecting to a negative pressure dust removal device.

[0012] The bottom of the mixing chamber is equipped with a discharge port, and the discharge port is equipped with an openable and closable baffle.

[0013] This invention utilizes a pre-crushing and screening chamber to effectively crush large pieces of construction waste and remove impurities. The device includes a wood ash inlet to effectively control the material's moisture content, and a negative pressure dust removal interface to effectively control dust pollution. The spiral agitator within the device enables efficient mixing of materials.

[0014] More preferably, the roller is a manganese steel roller.

[0015] More preferably, the outer surface of the roller is provided with equally spaced conical protrusions, the height of the conical protrusions is 6mm, and the distance between adjacent conical protrusions is 20mm.

[0016] More preferably, the length of the cross-section of the outer contour of the roller is 80-100 mm;

[0017] The width of the cross-section of the outer contour of the roller is 80-100mm.

[0018] More preferably, the inner walls of the pre-crushing and screening chamber and the mixing chamber are coated with polytetrafluoroethylene to prevent highly viscous slag from sticking to the walls.

[0019] More preferably, a drive motor for driving the rotating shaft to rotate is installed on the outer side of the outer cover, and the power output shaft of the drive motor is connected to the rotating shaft for transmission.

[0020] More preferably, the screen is a cylindrical screen with an opening at the left end.

[0021] More preferably, the screen is a stainless steel perforated plate, the aperture of the screen is 12mm, and the opening ratio of the screen is 38%.

[0022] More preferably, the upper feeding port, the lower feeding port, and the wood ash feeding port are all equipped with baffles for opening and closing.

[0023] More preferably, the inner wall of the mixing chamber is fitted with a 10mm thick polyethylene sheet. The surface has a Rockwell hardness of HRR 80-85, exhibiting excellent wear resistance.

[0024] Compared with the prior art, the beneficial effects of this utility model are:

[0025] 1. Improved mixing efficiency: By screening before mixing, the mixing effect is improved, and the uniformity of the mixed slag is increased;

[0026] 2. Moisture content control: The moisture content of the material is effectively controlled by quantitatively adding wood ash;

[0027] 3. Impurity removal rate: Impurity removal rate ≥5%, residual fragment size ≤2mm;

[0028] 4. Extended equipment life: Manganese steel rollers improve the wear resistance of key components by more than 3 times. Attached Figure Description

[0029] Figure 1 This is a cross-sectional view of a specific embodiment 1 of the present utility model;

[0030] Figure 2 This is a partial structural schematic diagram of the screen in specific embodiment 1 of this utility model;

[0031] Figure 3 This is a partial structural diagram of the screen in specific embodiment 1 of this utility model.

[0032] In the diagram: 1 is the upper feeding port, 2 is the lower feeding port, 3 is the outer cover, 4 is the screen, 5 is the rotating shaft, 6 is the cross-shaped support, 7 is the roller shaft, 8 is the negative pressure dust removal interface, 9 is the rotating shaft, 10 is the stirring blade, and 11 is the wood ash feeding port. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings.

[0034] See Figures 1 to 3 Specific Embodiment 1: A high-efficiency mixing device for engineering waste soil improvement, comprising a pre-crushing and screening chamber and a mixing chamber arranged vertically; the pre-crushing and screening chamber includes an inner and outer screen 4 and an outer cover 3, wherein at least two axially arranged cross-shaped support members 6 are fixed inside the screen 4, the center of the cross-shaped support member 6 is fixedly connected to the rotating shaft 5, and a roller 7 is sandwiched between adjacent cross-shaped support members 6, the cross-section of the outer contour of the roller 7 is rectangular, and the distance between the outer edge of the roller 7 and the inner wall of the screen 4 is 3-5 mm. mm; the lower end of the outer cover 3 is provided with a feeding port that connects to the mixing chamber; the outer cover 3 is provided with an upper feeding port 1, which connects to the screen 4; the mixing chamber is provided with a lower feeding port 2, and a rotating shaft 9 is provided inside the mixing chamber, on which a stirring blade 10 is installed; the top of the mixing chamber is also provided with a wood ash feeding port 11 for adding wood ash and a negative pressure dust removal interface 8 for connecting to a negative pressure dust removal device; the bottom of the mixing chamber is provided with a discharge port, which is equipped with an openable and closable baffle. This utility model can effectively crush large pieces of engineering waste and screen out impurities through the pre-crushing and screening chamber. The device is provided with a wood ash feeding port to effectively control the moisture content of the material, and the negative pressure dust removal interface 8 can effectively control dust pollution. The spiral agitator inside the device can achieve efficient mixing of materials.

[0035] The upper feeding port is the hopper located on the left side of the outer cover. The lower feeding port is the hopper located on the left side of the mixing chamber.

[0036] The outer wall of the stirring blade 10 is coated with tungsten carbide. There are two rotating shafts 9, which are arranged side by side. A drive mechanism for rotating the rotating shafts 9 is provided on the outside of the mixing chamber.

[0037] Roller 7 is made of manganese steel. The outer surface of roller 7 has evenly spaced conical protrusions, each 6mm high, with a spacing of 20mm between adjacent protrusions. The length and width of the cross-section of the outer contour of roller 7 are both 80-100mm. The spacing between roller 7 and the screen is staggered circumferentially. The roller alternately faces the screen with its edges and sides along the circumferential direction, thus switching the spacing between the outer edge of roller 7 and the inner wall of screen 4.

[0038] The spacing between adjacent cross-shaped support members 6 is no greater than the axial length of the screen. The spacing between adjacent cross-shaped support members 6 is 600mm-800mm.

[0039] The inner walls of the pre-crushing and screening chamber and the mixing chamber are coated with polytetrafluoroethylene to prevent highly viscous slag from sticking to the walls.

[0040] A drive motor for driving the rotating shaft 5 to rotate is installed on the outside of the outer cover 3, and the power output shaft of the drive motor is connected to the rotating shaft 5 for transmission.

[0041] Screen 4 is a cylindrical screen with an opening at the left end. Screen 4 is made of perforated stainless steel, with an aperture of 12mm and an aperture ratio of 38%. The inner wall of the outer casing is equipped with a support ring for rotatably connecting the left end of the screen. The support ring is rotatably connected to the screen.

[0042] The upper feeding port 1, the lower feeding port 2, and the wood ash feeding port 11 are all equipped with baffles for opening and closing. The baffles can be opened and closed by means of a telescopic rod. Alternatively, other methods can be used.

[0043] The inner wall of the mixing chamber is lined with a 10mm thick polyethylene sheet. The surface has a Rockwell hardness of HRR80-85, exhibiting excellent wear resistance.

[0044] In operation, first, connect the negative pressure dust removal interface 8 to the negative pressure dust removal device. Turn on the device, add construction waste into the upper feeding port, and add soil conditioner into the lower feeding port. The drive motor rotates the screen, crushing and screening the construction waste before it enters the mixing chamber to mix with the soil conditioner. Depending on the moisture content of the construction waste, add wood ash. The mixing chamber then mixes the construction waste, soil conditioner, and wood ash. After a specific mixing time, open the baffle at the bottom of the mixing chamber to discharge the waste.

[0045] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A high-efficiency mixing device for improving engineering waste soil, characterized in that, This includes a pre-crushing and screening chamber and a mixing chamber, which are arranged vertically. The pre-crushing and screening chamber includes an inner and outer screen and an outer cover. At least two axially arranged cross-shaped support members are fixed inside the screen. The center of the cross-shaped support member is fixedly connected to the rotating shaft. A roller is sandwiched between adjacent cross-shaped support members. The cross-section of the outer contour of the roller is rectangular. The distance between the outer edge of the roller and the inner wall of the screen is 3-5mm. The lower end of the outer cover is provided with a discharge port that connects with and communicates with the mixing chamber; The outer cover is provided with an upper feeding port, which is connected to the screen. The mixing chamber is provided with a lower feeding port, and a rotating shaft is provided inside the mixing chamber, on which a stirring blade is installed; The top of the mixing chamber is also provided with a wood ash inlet for adding wood ash and a negative pressure dust removal interface for connecting to a negative pressure dust removal device. The bottom of the mixing chamber is equipped with a discharge port, and the discharge port is equipped with an openable and closable baffle.

2. The high-efficiency mixing device for improving engineering waste soil according to claim 1, characterized in that: The roller is a manganese steel roller.

3. The high-efficiency mixing device for improving engineering waste soil according to claim 1, characterized in that: The outer surface of the roller is provided with equally spaced conical protrusions, the height of the conical protrusions is 6mm, and the distance between adjacent conical protrusions is 20mm.

4. The high-efficiency mixing device for improving engineering waste soil according to claim 1, characterized in that: The length of the cross-section of the outer contour of the roller is 80-100mm; The width of the cross-section of the outer contour of the roller is 80-100mm.

5. The high-efficiency mixing device for improving engineering waste soil according to claim 1, characterized in that: The inner walls of the pre-crushing and screening chamber and the mixing chamber are coated with polytetrafluoroethylene.

6. The high-efficiency mixing device for improving engineering waste soil according to claim 1, characterized in that: A drive motor for driving the rotating shaft is installed on the outer side of the outer cover, and the power output shaft of the drive motor is connected to the rotating shaft for transmission.

7. The high-efficiency mixing device for improving engineering waste soil according to claim 1, characterized in that: The screen is a cylindrical screen with an opening at the left end.

8. The high-efficiency mixing device for improving engineering waste soil according to claim 1, characterized in that: The screen is a perforated stainless steel plate with a hole diameter of 12mm and an opening ratio of 38%.

9. A high-efficiency mixing device for improving engineering waste soil according to claim 1, characterized in that: The upper feeding port, the lower feeding port, and the wood ash feeding port are all equipped with baffles for opening and closing.

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