Earth and rockfill dam hydraulic fiber asphalt concrete stirring device and method capable of uniformly distributing fibers

Abstract

The invention discloses an earth and rockfill dam hydraulic fiber asphalt concrete stirring device and method capable of enabling fibers to be evenly distributed, the device comprises a supporting plate installed at the top of a working frame, a rotating assembly is installed on the supporting plate and comprises a first motor fixed outside, and an output shaft of the rotating assembly is in transmission connection with a main rotating rod; a material stirring paddle matched with the inner wall of the asphalt concrete stirring pot is fixedly connected to the bottom end of the main rotating rod and is used for rotating and stirring asphalt concrete; determining the mix proportion of the fiber asphalt concrete during preparation; carrying out artificial primary screening on the mineral aggregate; heating the raw materials in a drying oven; stirring the fiber asphalt concrete raw materials; filling the fiber asphalt concrete into a mold for molding; and cleaning the stirring device. The fiber asphalt concrete stirring device provided by the invention solves the problems that in the prior art, fibers are easy to agglomerate and are easy to adhere to a stirring paddle due to concentrated feeding, and the dispersion effect of the fibers is improved; and the uniformity of the fibers in the asphalt concrete is ensured.

Description

Technical Field

[0001] The invention relates to the field of asphalt concrete testing, in particular to a device and method for stirring hydraulic fiber asphalt concrete for earth-rock dams which can make fibers evenly distributed. Background Art

[0002] With the continuous advancement of the national "dual carbon" strategic goals, pumped storage has become the largest energy storage method in the power system due to its most mature technology, optimal economy, green and low-carbon advantages. Hydraulic asphalt concrete has good anti-seepage performance and excellent deformation adaptability, and is widely used in the anti-seepage structure of pumped storage power stations. Affected by a series of environmental factors and structural factors such as reservoir water level rise and fall, sunlight exposure, day and night temperature difference, dam settlement, etc., hydraulic asphalt concrete is prone to bulging, deformation, cracking and other problems under long-term service conditions.

[0003] Hydraulic asphalt concrete is a composite material, mainly composed of asphalt, coarse aggregate, fine aggregate and mineral powder. Fiber asphalt concrete refers to fiber asphalt concrete formed by adding a certain amount of chopped and dispersed fibers during the preparation of asphalt concrete. Studies have found that hydraulic fiber asphalt concrete has improved mechanical indicators and properties compared with ordinary hydraulic asphalt concrete, and can effectively improve its thermal stability, low-temperature crack resistance and tensile strength. According to the different types of added fibers, fiber asphalt concrete can be divided into basalt fiber asphalt concrete, steel fiber asphalt concrete and polyester fiber asphalt concrete.

[0004] In order to improve the various performances and mechanical properties of fiber asphalt concrete, the fiber and asphalt concrete must be fully mixed and combined. Only when the fiber is evenly dispersed in the asphalt concrete and does not agglomerate can the optimal effect be achieved. In the actual preparation process of fiber asphalt concrete, the production technology is not yet mature, and it is easy to have fiber agglomeration and uneven dispersion.

[0005] In the prior art, fiber asphalt concrete mixers lack the step or device for pre-dispersing fibers, and often adopt a "dry first, wet later" mixing process, that is, first add coarse aggregate, fine aggregate, mineral powder, and fiber to the mixer for dry mixing, and then add asphalt for mixing. This mixing method can only make the fibers evenly dispersed in the asphalt concrete but cannot decompose the agglomerated fibers. Moreover, the fiber addition mainly relies on manual labor, and the fiber dispersion and the uniformity of the added fibers cannot be effectively controlled, so that the performance and strength of the prepared fiber asphalt concrete cannot meet expectations. For example, patent publication number CN219463526U, a Chinese patent named a fiber concrete fiber dispersion device, discloses that the fibers are broken up and the broken fibers fall into the mixer through a discharge pipe. However, the discharge pipe set in the device is small, and the broken fibers fall into a certain area on the surface of the mixture. The device does not clearly explain how it is connected to the mixing pot, and cannot continuously stir the broken materials.

[0006] Therefore, it is necessary to invent a mixing device and method for hydraulic fiber asphalt concrete of earth-rock dam that can make fibers evenly distributed to solve the above problems. Summary of the invention

[0007] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is: how to provide an earth-rock dam hydraulic fiber asphalt concrete mixing device with ingenious structural design, convenient operation and use, and the ability to improve the dispersion rate and uniformity of fibers in asphalt concrete.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0009] A hydraulic fiber asphalt concrete mixing device for an earth-rock dam capable of evenly distributing fibers, comprising an asphalt concrete mixing pot and a support plate mounted on the top of a work frame, wherein a rotating assembly is mounted on the support plate, comprising an externally fixed first motor, wherein the output shaft of the first motor is drivingly connected to a main rotating rod, and the bottom end of the main rotating rod is fixedly connected to a material stirring paddle matching the inner wall of the asphalt concrete mixing pot, for rotating and stirring the asphalt concrete; a first gear, a fiber dispersing umbrella surface and a strip-shaped connecting rod are sequentially arranged on the outer side of the main rotating rod from top to bottom, wherein the first gear and the fiber dispersing umbrella surface are both fixedly connected to the main rotating rod, a plurality of evenly distributed hollow openings are provided on the fiber dispersing umbrella surface, an annular rack is fixedly connected to the outer end of the strip-shaped connecting rod, and the fiber dispersing umbrella surface is coaxially distributed with a protective cover cylinder, and a gap is reserved between the two;

[0010] A protective cover is coaxially distributed inside the working frame and between the support plate and the asphalt concrete mixing pot, a fiber feed port is provided at the top axis of the protective cover, an asphalt concrete mixing pot is coaxially distributed directly below the protective cover, and a screen is provided between the protective cover and the asphalt concrete mixing pot;

[0011] The protective cover is provided with a fiber scattering device, which includes a plurality of connecting rods distributed around the outside of the main rotating rod, and the main rotating rod and the connecting rod are both rotatably connected to the support plate, and the top and bottom ends of the connecting rods are respectively fixedly connected to a second gear and a fiber scattering brush, and the plurality of second gears are all meshed with the first gear for transmission;

[0012] A secondary fiber breaking rod is movably arranged inside the protective cover, a "cross-shaped" columnar protrusion is arranged outside the secondary fiber breaking rod and directly below the hollow opening, and a third gear meshing with the annular rack is fixedly connected to the outside of the secondary fiber breaking rod;

[0013] A fiber asphalt concrete discharging bin is arranged at the bottom of the asphalt concrete mixing pot, and the output end of the asphalt concrete mixing pot is docked and matched with the input end of the fiber asphalt concrete discharging bin.

[0014] Preferably, the working frame comprises two hollow columns which are parallel and symmetrically distributed at the bottom of the supporting plate, and a fixed support is installed at the bottom end of the hollow column;

[0015] The two sides of the screen are respectively fixedly connected to the hollow columns on both sides;

[0016] An adjusting mechanism is installed on the hollow column to enable the asphalt concrete mixing pot to move up and down in the vertical direction.

[0017] Preferably, the adjustment mechanism comprises a threaded support column and a threaded sleeve, and the threaded support column is threadedly sleeved inside the threaded sleeve;

[0018] A third motor is embedded in the fixed support, and the output shaft of the third motor is drivingly connected to the threaded support column for adjusting the height of the asphalt concrete mixing pot.

[0019] Preferably, the protective cover further comprises a protective cover top cover and a protective cover cylinder, wherein the protective cover top cover is buckled and arranged on the top of the protective cover cylinder, and the fiber feed port is installed on the protective cover top cover and penetrates the protective cover top cover, the protective cover cylinder is arranged as a cylindrical structure with openings at both ends, and the screen is blocked at the bottom of the protective cover cylinder;

[0020] The secondary fiber breaking rod is rotatably connected to the protective cover cylinder through a bearing, and the other end of the secondary fiber breaking rod does not contact the main rotating rod;

[0021] The protective cover cylinder is provided with observation windows on both the front and rear sides;

[0022] The left and right sides of the protective cover cylinder are respectively fixedly connected with a left ear of the protective cover and a right ear of the protective cover;

[0023] Four right-angled triangular plates are fixedly installed on the upper part of the inner wall of the protective cover cylinder, and brushes are installed on the lower oblique sides of the right-angled triangular plates, and the ends of the brushes are in contact with the upper surface of the fiber dispersion umbrella-shaped surface.

[0024] Preferably, the asphalt concrete mixing pot comprises a mixing chamber, the front and rear sides of the mixing chamber are provided with aggregate feed ports, the left and right sides of the mixing chamber are respectively fixedly connected with a left ear of the mixing chamber and a right ear of the mixing chamber, and the threaded sleeves located on both sides are respectively detachably mounted with the left ear of the mixing chamber and the right ear of the mixing chamber by screws;

[0025] The two hollow columns are provided with parallel rail grooves on opposite sides, and the combination of the left ear of the stirring chamber or the right ear of the stirring chamber and the threaded sleeve is slidably connected with the rail grooves on both sides.

[0026] Preferably, a cleaning assembly is arranged outside the hollow column, which includes an asphalt solvent containing box, and an asphalt solvent injection pipe and an air compressor connecting pipe are connected to the asphalt solvent containing box above;

[0027] The asphalt solvent containing box is connected to an asphalt solvent pipeline below, and a plurality of asphalt solvent nozzles are vertically distributed at the output end of the asphalt solvent pipeline, and the positions of the asphalt solvent nozzles match the material stirring paddle;

[0028] A pressure gauge is installed on the asphalt dissolving agent storage box;

[0029] The asphalt solvent injection pipe, the air compressor connecting pipe and the asphalt solvent pipeline are respectively provided with an asphalt solvent injection valve, an air valve and an asphalt solvent spraying control valve.

[0030] Preferably, the angle between the inclined surface of the fiber dispersion umbrella-shaped surface and the horizontal plane is 20°;

[0031] The number of the strip connecting rods and the fiber secondary breaking rods is set to eight, the eight strip connecting rods and the fiber secondary breaking rods are distributed in a ring array, and the angle between two adjacent strip connecting rods or two adjacent fiber secondary breaking rods is set to 45°.

[0032] Preferably, the discharge bin comprises a discharge bin cylinder, which is configured as a cylindrical structure with an opening at one end, a feed bin opening is provided at the top of the discharge bin cylinder and directly below the output port of the stirring chamber, a control feed plate is movably provided in the feed bin opening, a discharge bin shaft is rotatably connected to the inner axis of the discharge bin cylinder, and a spiral surface matching the inner wall of the discharge bin cylinder is fixedly connected to the outer side of the discharge bin shaft, a second motor is fixedly connected to the closed end of the discharge bin cylinder, and the output shaft of the second motor is drivingly connected to the discharge bin shaft.

[0033] A method for preparing hydraulic fiber asphalt concrete for earth-rock dams with evenly distributed fibers, using the above-mentioned stirring device for operation, comprises the following steps:

[0034] S1. Determine the raw materials of fiber asphalt concrete, including asphalt, aggregate, filler and fiber;

[0035] S2. Determine the mix ratio of fiber asphalt concrete, including the asphalt-stone ratio, gradation index, filler dosage and fiber dosage; the mineral gradation adopts the following mineral gradation formula:

[0036]

[0037] Among them, d i is the mesh size of sieve i; p i The aperture is d i The passing rate of the sieve; p 0.075 is the filler dosage; r is the grading index; D max is the maximum particle size of the ore;

[0038] S3. Perform preliminary screening and batching of the ore materials, dry them in an oven at 105℃, and then grade them with a sieve; determine the size of the sieve holes, and weigh out the amount of ore materials required for each plate of material according to the prescribed mix ratio;

[0039] S4. Heating the raw materials of fiber asphalt concrete, heating the selected asphalt to 140°C-150°C to make it liquid and easy to flow; heating the selected aggregate, filler and fiber to 170°C;

[0040] S5, stirring fiber asphalt concrete, adding mineral material, fiber, asphalt and filler in sequence, stirring the mixture by using a stirring device to obtain fiber asphalt concrete;

[0041] S6, loading and molding, start the third motor, driven by the output shaft of the third motor, the asphalt concrete mixing pot moves downward as a whole; the control feed plate is taken out, and the fiber asphalt concrete falls into the discharge bin cylinder; start the second motor, slowly push the fiber asphalt concrete out of the discharge bin cylinder and put it into the experimental mold; enter the next step of compaction molding and later maintenance;

[0042] S7. Clean the device and inject the asphalt solvent from the asphalt solvent injection pipe. When the asphalt solvent storage box is full, connect the air compressor to compress the air. When the pressure value on the pressure gauge reaches 0.5MPa, turn off the air compressor and the air valve. Start the first motor to drive the rotating component to rotate. At the same time, open the asphalt solvent spray control valve, and the asphalt solvent flows through the asphalt solvent pipeline and is sprayed out from the asphalt solvent nozzle to clean the material stirring paddle.

[0043] Preferably, the stirring process of the fiber asphalt concrete by the stirring device is as follows:

[0044] S5.1, stirring the ore, pouring the selected ore into the stirring chamber through the aggregate feed port; starting the third motor, and driven by its output shaft, the stirring chamber moves upward to below the screen; then starting the first motor, driving the rotating assembly to rotate, stirring the ore, and the stirring time is set to 60s;

[0045] S5.2, add fiber for stirring, start the first motor to drive the rotating assembly to rotate, and at the same time put the selected fiber into the fiber feed port, and set the stirring time to 60s;

[0046] S5.3, add asphalt for stirring, pour the selected asphalt into the stirring chamber through the aggregate feed port; start the first motor to drive the rotating component to rotate, and set the stirring time to 60s;

[0047] S5.4, add filler for stirring, pour the selected filler into the stirring chamber through the aggregate feed port; start the first motor to drive the rotating component to rotate, and set the stirring time to 60s.

[0048] Beneficial effects:

[0049] 1. The fiber asphalt concrete is stirred by adopting the stirring device provided by the present invention. The rotating component drives the fiber breaking brush and the fiber breaking rod to rotate, thereby realizing the primary and secondary breaking of the fibers and improving the effect of the fiber breaking. The fiber dispersing umbrella surface utilizes the centrifugal force to enable the fibers to slide toward the hollow opening, so that the fibers fall evenly into the asphalt concrete stirring pot, thereby improving the uniformity of the fibers in the asphalt concrete and obtaining the hydraulic fiber asphalt concrete for earth-rock dam with evenly distributed fibers.

[0050] 2. By installing a discharge bin at the bottom of the mixing chamber, the need to manually flip the mixing pot to discharge the material is avoided, which saves manpower and avoids the occurrence of asphalt concrete spilling due to over-rapid flipping; installing a spiral rotating rod in the discharge bin can control the discharge speed and prevent uneven distribution of coarse and fine aggregates due to manual discharge.

[0051] 3. After the mixing is completed, the adhesion of asphalt and fiber will reduce the operating efficiency of the device and will also greatly affect the next asphalt concrete mixing work; the mixing device provided in the present invention can clean the mixing component after the mixing is completed through the work of the cleaning component, which greatly saves manual labor. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 This is a schematic diagram of the overall structure of the fiber asphalt concrete mixing device provided by the present invention.

[0053] Figure 2It is a schematic diagram of the coordination structure of the rotating assembly and the fiber breaking device in the present invention.

[0054] Figure 3 It is a schematic diagram of the internal structure of the protective cover in the present invention.

[0055] Figure 4 It is a distribution diagram of the hollowing out on the fiber dispersion umbrella-shaped surface and the fiber-dispersing rod-shaped protrusions in the present invention.

[0056] Figure 5 This is a cross-sectional view of the interior of the discharge bin in the present invention.

[0057] Figure 6 This is a partial display diagram of the coordination structure between the asphalt concrete mixing pot and the hollow column on the right side in the present invention.

[0058] Figure 7 This is a front view of the main structure of the asphalt concrete mixing pot in the present invention.

[0059] Figure 8 It is a schematic diagram of the structure of the cleaning component in the present invention.

[0060] Fig. 9 It is a preparation flow chart of the mixing and molding of fiber asphalt concrete in the present invention.

[0061] Reference numerals:

[0062] 1. Support plate;

[0063] 2. Hollow column; 2-1. Threaded support column; 2-2 Threaded kit;

[0064] 3. Fixed support;

[0065] 4. Rotating assembly; 4-1. First motor; 4-2. First gear; 4-3. Fiber dispersion umbrella-shaped surface; 4-4. Strip connecting rod; 4-5. Ring rack; 4-6. Material stirring paddle; 4-7. Main rotating rod;

[0066] 5. Fiber feed port;

[0067] 6. Protective cover; 6-1. Top cover of protective cover; 6-2. Cylinder of protective cover; 6-3. Observation window; 6-4. Third gear; 6-5. Secondary fiber breaking rod; 6-6. Right angle triangle plate; 6-7. Brush; 6-8. Left ear of protective cover; 6-9. Right ear of protective cover;

[0068] 7. Asphalt concrete mixing pot; 7-1. Mixing chamber; 7-2. Aggregate feed port; 7-3. Left ear of mixing chamber; 7-4. Right ear of mixing chamber;

[0069] 8. Screen;

[0070] 9. Fiber breaking device; 9-1. Second gear; 9-2. Connecting rod; 9-3. Fiber breaking brush;

[0071] 10. Discharge bin; 10-1. Second motor; 10-2. Control feed plate; 10-3. Discharge bin cylinder; 10-4. Helical surface; 10-5. Feed bin opening; 10-6. Discharge bin rotating shaft;

[0072] 11. Cleaning components; 11-1. Asphalt solvent storage box; 11-2. Asphalt solvent injection pipe; 11-3. Air compressor connecting pipe; 11-4. Asphalt solvent injection valve; 11-5. Air valve; 11-6. Pressure gauge; 11-7. Asphalt solvent spray control valve; 11-8. Asphalt solvent pipeline; 11-9. Asphalt solvent nozzle;

[0073] 12. The third motor. DETAILED DESCRIPTION

[0074] The following is combined with Figure 1-9 The present application is further described in detail. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It is also necessary to explain that, for the convenience of description, only the parts related to the present invention, rather than all structures, are shown in the drawings.

[0075] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below in conjunction with the accompanying drawings and embodiments of the specification. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the composition related to the present invention. The protection scope of the present invention is not limited to the following specific embodiments.

[0076] In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not indicate the importance of the components, and therefore cannot be understood as a limitation on the present invention. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the scope of protection of the present invention.

[0077] like Figure 1 As shown, a hydraulic fiber asphalt concrete mixing device for earth-rock dams that can make fibers evenly distributed includes an asphalt concrete mixing pot 7 and a support plate 1 installed on the top of a working frame, and a rotating component 4 is installed on the support plate 1. Figure 2As shown, the rotating assembly 4 includes an externally fixed first motor 4-1, the output shaft of the first motor 4-1 is drivingly connected to a main rotating rod 4-7, and the bottom end of the main rotating rod 4-7 is fixedly connected to a material stirring paddle 4-6 that matches the inner wall of the asphalt concrete mixing pot 7, which is used to rotate and stir the asphalt concrete; the outer side of the main rotating rod 4-7 is provided with a first gear 4-2, a fiber dispersion umbrella surface 4-3 and a strip connecting rod 4-4 in sequence from top to bottom, wherein the first gear 4-2 and the fiber dispersion umbrella surface 4-3 are both fixedly connected to the main rotating rod 4-7, a number of evenly distributed hollow openings are opened on the fiber dispersion umbrella surface 4-3, the outer end of the strip connecting rod 4-4 is fixedly connected to an annular rack 4-5, the fiber dispersion umbrella surface 4-3 is coaxially distributed with the protective cover cylinder 6-2 and a gap is reserved between the two;

[0078] A protective cover 6 is coaxially arranged inside the work frame and between the support plate 1 and the asphalt concrete mixing pot 7. A fiber feed port 5 is arranged at the top axis of the protective cover 6. The asphalt concrete mixing pot 7 is coaxially arranged directly below the protective cover 6, and a screen 8 is arranged between the protective cover 6 and the asphalt concrete mixing pot 7. The asphalt concrete mixing pot 7 is located below the screen 8 and is used to mix aggregates, fillers, fibers and asphalt. The screen 8 can prevent the falling, unbroken, agglomerated fibers from falling into the asphalt concrete mixing pot 7.

[0079] A fiber scattering device 9 is provided on the protective cover 6, which includes a plurality of connecting rods 9-2 distributed around the outside of the main rotating rod 4-7, and the main rotating rod 4-7 and the connecting rod 9-2 are both rotatably connected to the support plate 1, and the top and bottom ends of the connecting rod 9-2 are respectively fixedly connected to the second gear 9-1 and the fiber scattering brush 9-3, and the plurality of second gears 9-1 are all meshed with the first gear 4-2 for transmission;

[0080] A secondary fiber breaking rod 6-5 is movably arranged inside the protective cover 6, and a "cross-shaped" columnar protrusion is arranged outside the secondary fiber breaking rod 6-5 and directly below the hollow opening. A third gear 6-4 meshing with the annular rack 4-5 is also fixedly connected to the outside of the secondary fiber breaking rod 6-5; driven by the rotation of the annular rack 4-5, the third gear 6-4 and the secondary fiber breaking rod 6-5 also rotate accordingly. The fibers dropped through the hollow opening of the fiber dispersion umbrella surface 4-3 can be secondarily broken up by the rotating secondary fiber breaking rod 6-5, thereby improving the efficiency of fiber dispersion.

[0081] A fiber asphalt concrete discharging bin 10 is provided at the bottom of the asphalt concrete mixing pot 7 , and the output end of the asphalt concrete mixing pot 7 is docked and matched with the input end of the fiber asphalt concrete discharging bin 10 .

[0082] The first motor 4-1, the first gear 4-2 and the second gear 9-1 are placed on the top of the support plate 1, and the first gear 4-2 is flush with the second gear 9-1; the fiber dispersion umbrella surface 4-3, the strip connecting rod 4-4, the annular rack 4-5 and the fiber breaking brush 9-3 are all placed inside the protective cover 6; the fiber dispersion umbrella surface 4-3 is located on the upper part of the strip connecting rod 4-4, and a gap is reserved between the bottom end of the fiber dispersion umbrella surface 4-3 and the top of the strip connecting rod 4-4.

[0083] The fiber breaking brush 9-3 is made of aluminum alloy, which is hard and resistant to high temperature, and is used to initially break up the clumped fibers. The first gear 4-2, the fiber dispersing umbrella surface 4-3, the bar-shaped connecting rod 4-4, the annular rack 4-5, the material stirring paddle 4-6, the main rotating rod 4-7, the second gear 9-1 and the connecting rod 9-2 are all made of aluminum alloy, which has low density and high enough strength.

[0084] In the above technical scheme, as an embodiment of the working frame in the present invention, the working frame includes two hollow columns 2 parallel and symmetrically distributed at the bottom of the support plate 1, and a fixed support 3 is installed at the bottom of the hollow column 2; the fixed support 3 is located at the bottom of the entire device, and is made of aluminum alloy, with a certain strength and quality to ensure that it has sufficient strength to support the entire device. At the same time, the fixed support 3 is hollow inside and is used to install the third motor 12. The hollow column 2 is located at the top of the fixed support 3. In this embodiment, the height of the hollow column 2 is set to 1.3m, and the hollow column 2 is hollow inside, with a rectangular cross-section, a size of 10cm×10cm, and a thickness of 3mm. There is an opening on the inside of the hollow column 2, and the opening size is 4cm×60cm, which can provide space for the asphalt concrete mixing pot 7 to move in the vertical direction. The material of the hollow column 2 is aluminum alloy to ensure that it has sufficient strength and anti-deformation ability to support the upper device.

[0085] Both sides of the screen 8 are fixedly connected to the hollow columns 2 on both sides;

[0086] An adjusting mechanism is installed on the hollow column 2 for moving the asphalt concrete mixing pot 7 in the vertical direction.

[0087] In the above technical solution, as an implementation of the adjustment mechanism in the present invention, it includes a threaded support column 2-1 and a threaded sleeve 2-2, and the threaded support column 2-1 is threadedly sleeved inside the threaded sleeve 2-2;

[0088] A third motor 12 is embedded inside the fixed support 3 , and the output shaft of the third motor 12 is transmission-connected to the threaded support column 2 - 1 for adjusting the height of the asphalt concrete mixing pot 7 .

[0089] Specifically, the output shaft of the third motor 12 is connected to the threaded support column 2-1, and the asphalt concrete mixing pot 7 is sleeved on the threaded support column 2-1 through the left ear 7-3 of the mixing chamber or the right ear 7-4 of the mixing chamber and the threaded sleeve 2-2. The threaded support column 2-1 and the threaded sleeve 2-2 are made of aluminum alloy material, which is resistant to high temperature and has high enough strength.

[0090] In the above technical solution, as an embodiment of the protective cover 6 in the present invention, the protective cover 6 also includes a protective cover top cover 6-1 and a protective cover cylinder 6-2, wherein the protective cover top cover 6-1 is buckled and arranged on the top of the protective cover cylinder 6-2, and the fiber feed port 5 is installed on the protective cover top cover 6-1 and penetrates the protective cover top cover 6-1, and the fiber feed port 5 is located at the center of the protective cover top cover 6-1;

[0091] The protective cover cylinder 6-2 is configured as a cylindrical structure with openings at both ends, and the screen 8 is sealed at the bottom of the protective cover cylinder 6-2;

[0092] The secondary fiber breaking rod 6-5 is rotatably connected to the protective cover cylinder 6-2 through a bearing, and the other end of the secondary fiber breaking rod 6-5 is not in contact with the main rotating rod 4-7;

[0093] The fiber feed port 5 is used as the fiber delivery entrance, and is set to an inverted frustum structure, and its bottom is a 20cm×20cm square opening, and its top is a 30cm×30cm square opening. The fiber feed port 5 is made of aluminum alloy, which has the characteristics of low density and high strength. The screen 8 is made of iron.

[0094] Observation windows 6-3 are provided on both the front and rear sides of the protective cover cylinder 6-2; through the observation windows 6-3, the dispersion of the fibers inside the protective cover cylinder 6-2 can be visually seen.

[0095] The observation window 6-3 is a rectangular window with a size of 20cm×11cm, and its material is high temperature resistant glass.

[0096] The left and right sides of the protective cover cylinder 6-2 are respectively fixedly connected with a protective cover left ear 6-8 and a protective cover right ear 6-9;

[0097] Four right-angled triangles 6-6 are fixedly installed on the upper inner wall of the shield cylinder 6-2, and the shorter right-angled sides of the right-angled triangles 6-6 are welded to the inner wall of the shield cylinder 6-2; brushes 6-7 are installed on the lower oblique sides of the right-angled triangles 6-6, and the ends of the brushes 6-7 are in contact with the upper surface of the fiber dispersion umbrella surface 4-3. Since the right-angled triangles 6-6 are fixed and the fiber dispersion umbrella surface 4-3 rotates during operation, the right-angled triangles 6-6 can prevent fibers from accumulating on the surface of the fiber dispersion umbrella surface 4-3.

[0098] Specifically, the number of the brushes 6-7 is multiple, and the multiple brushes 6-7 are distributed in a linear array, and the length of each brush 6-7 is 3 cm.

[0099] The right-angled triangle plate 6-6, the fiber secondary breaking rod 6-5, the left ear 6-8 of the protective cover and the right ear 6-9 of the protective cover are all made of aluminum alloy, which has low density and high enough strength.

[0100] like Figure 6 As shown, the asphalt concrete mixing pot 7 includes a mixing chamber 7-1, and aggregate feed ports 7-2 are provided on both the front and rear sides of the mixing chamber 7-1, and a mixing chamber left ear 7-3 and a mixing chamber right ear 7-4 are fixedly connected to the left and right sides of the mixing chamber 7-1 respectively;

[0101] The threaded sleeves 2-2 on both sides are detachably mounted to the left ear 7-3 of the stirring chamber and the right ear 7-4 of the stirring chamber by screws;

[0102] The two hollow columns 2 are provided with parallel rail grooves on opposite sides, and the combination of the left ear 7-3 of the stirring chamber or the right ear 7-4 of the stirring chamber and the threaded sleeve 2-2 is slidably connected to the rail grooves on both sides. When the third motor 12 is powered on, it can drive the threaded support column 2-1 to rotate. Under the rotation of the threaded support column 2-1, the stirring chamber 7-1 can move up and down along with the movement of the threaded sleeve 2-2.

[0103] The materials of the stirring chamber 7-1, the aggregate feed port 7-2, the left ear 7-3 of the stirring chamber, and the right ear 7-4 of the stirring chamber are all made of aluminum alloy, which is resistant to high temperatures and has high enough strength.

[0104] like Figure 1 and 8 As shown, a cleaning assembly 11 is provided on the outside of the hollow column 2 for cleaning the stirring device, which includes an asphalt solvent containing box 11-1 installed on the upper part of the support plate 1, and an asphalt solvent injection pipe 11-2 and an air compressor connecting pipe 11-3 are connected above the asphalt solvent containing box 11-1; the input end of the air compressor connecting pipe 11-3 is connected to an external air compressor to provide pressure;

[0105] The asphalt solvent containing box 11-1 is connected to an asphalt solvent pipeline 11-8 below, and a plurality of asphalt solvent nozzles 11-9 are vertically distributed at the output end of the asphalt solvent pipeline 11-8, and the positions of the asphalt solvent nozzles 11-9 match the material stirring paddle 4-6;

[0106] A pressure gauge 11-6 is installed on the asphalt dissolving agent storage box 11-1;

[0107] The asphalt solvent injection pipe 11-2, the air compressor connecting pipe 11-3 and the asphalt solvent pipeline 11-8 are respectively provided with an asphalt solvent injection valve 11-4, an air valve 11-5 and an asphalt solvent spraying control valve 11-7. The asphalt solvent injection valve 11-4 is used to control the injection of the asphalt solvent and form an airtight system; the air valve 11-5 is used to connect the asphalt solvent storage box 11-1 and form an airtight system; the pressure gauge 11-6 is used to measure the internal pressure value of the asphalt solvent storage box 11-1; the asphalt solvent spraying control valve 11-7 is used to control the spraying of the asphalt solvent and form an airtight system.

[0108] The asphalt dissolving agent storage box 11 - 1 is installed above the supporting plate 1 and is used for storing the asphalt dissolving agent.

[0109] In this embodiment, three asphalt dissolving agent nozzles 11 - 9 are installed at the end of the asphalt dissolving agent pipeline 11 - 8 , and the interval between the three asphalt dissolving agent nozzles 11 - 9 is 10 cm.

[0110] Asphalt solvent containing box 11-1, asphalt solvent injection pipe 11-2, air compressor connecting pipe 11-3, asphalt solvent injection valve 11-4, air valve 11-5, asphalt solvent spray control valve 11-7, asphalt solvent pipeline 11-8, asphalt solvent nozzle 11-9 are all made of aluminum alloy material, which has high strength and does not chemically react with the asphalt solvent.

[0111] Further, in the above technical solution, the angle between the inclined surface of the fiber dispersion umbrella-shaped surface 4-3 and the horizontal plane is 20°;

[0112] The number of the strip connecting rods 4-4 and the fiber secondary breaking rods 6-5 is set to eight, the eight strip connecting rods 4-4 and the fiber secondary breaking rods 6-5 are distributed in a ring array, and the angle between two adjacent strip connecting rods 4-4 or two adjacent fiber secondary breaking rods 6-5 is set to 45°.

[0113] like Figure 5As shown, the discharge bin 10 includes a discharge bin cylinder 10-3, which is configured as a cylindrical structure with an opening at one end, a feed bin opening 10-5 is provided at the top of the discharge bin cylinder 10-3 and directly below the output port of the stirring chamber 7-1, and a control feed plate 10-2 is movably provided in the feed bin opening 10-5, a discharge bin shaft 10-6 is rotatably connected to the inner axis of the discharge bin cylinder 10-3, and a spiral surface 10-4 matching the inner wall of the discharge bin cylinder 10-3 is fixedly connected to the outer side of the discharge bin shaft 10-6, that is, the outer edge of the spiral surface 10-4 is in contact with the inner wall of the discharge bin cylinder 10-3, and a second motor 10-1 is fixedly connected to the closed end of the discharge bin cylinder 10-3, and the output shaft of the second motor 10-1 is transmission-connected to the discharge bin shaft 10-6. When the asphalt concrete is in a stirring state, the feed plate 10-2 is controlled to be in a closed state; when the asphalt concrete is stirred, the feed plate 10-2 is controlled to be in an open state. After the second motor 10-1 is powered on, it drives the discharge bin shaft 10-6 to rotate, and then drives the spiral surface 10-4 to rotate. Under the rotation of the spiral surface 10-4, the asphalt concrete is slowly pushed out from the inside of the discharge bin cylinder 10-3.

[0114] The discharge bin shaft 10-6 is a cylindrical long rod, and its length is the same as that of the discharge bin cylinder 10-3. In this embodiment, the length is set to 30 cm.

[0115] The control feed plate 10-2, the discharge bin cylinder 10-3, the spiral surface 10-4, the feed bin opening 10-5, and the discharge bin shaft 10-6 are all made of aluminum alloy, which is resistant to high temperatures and has sufficient strength.

[0116] like Fig. 9 As shown, a method for preparing hydraulic fiber asphalt concrete for earth-rock dams that can make fibers evenly distributed is performed using the above-mentioned stirring device, and includes the following steps:

[0117] S1. Determine the raw materials of fiber asphalt concrete, including asphalt, aggregate, filler and fiber;

[0118] Asphalt is petroleum asphalt, and its variety and grade should be selected according to factors such as project type, structural performance, temperature and construction requirements. The main technical requirements of petroleum asphalt include asphalt penetration, asphalt ductility, asphalt softening point, etc. In this embodiment, Karamay 70# asphalt is selected.

[0119] Aggregates should be hard and will not change in properties due to heat. Aggregates can be alkaline aggregates. When acidic aggregates are used, measures should be taken to enhance the bonding performance between asphalt and aggregates, and these measures should be verified through experimental research. In this embodiment, limestone is selected.

[0120] The filler is preferably made of stone powder processed from alkaline rocks, such as limestone powder, dolomite powder, etc. In this embodiment, limestone powder is selected.

[0121] The addition of fibers can improve the high temperature stability, low temperature crack resistance and fatigue resistance of asphalt concrete. The fibers should be selected with characteristics such as large fineness, high strength and high temperature resistance. In this embodiment, polyester fibers are selected.

[0122] S2. Determine the mix ratio of fiber asphalt concrete, including the oil-stone ratio, gradation index, filler dosage and fiber content; when selecting the mix ratio of hydraulic fiber asphalt concrete, factors such as the temperature of the project site, project structure, raw material properties and construction conditions should be considered. It is often determined by referring to similar project experience or experimental research methods. The mineral aggregate gradation adopts the following mineral aggregate gradation formula proposed by Ding Purong based on Fuller's formula:

[0123]

[0124] Among them, d i is the mesh size of sieve i; p i The aperture is d i The passing rate of the sieve; p 0.075 is the filler dosage; r is the grading index; D max The maximum particle size of the ore.

[0125] In this embodiment, referring to the anti-seepage layer mix ratio of the asphalt concrete panel project of Baoquan Pumped Storage Power Station, the oil-stone ratio is determined to be 7.0%; the filler dosage is determined to be 13.0%; the maximum particle size of the mineral material is determined to be 16mm; the gradation index is determined to be 0.275; and the fiber content is determined to be 0.4%. According to the size of the laboratory rutting plate mold, the total mass of the fiber asphalt concrete is determined to be 11kg.

[0126] The mineral aggregate gradation composition of fiber asphalt concrete is shown in Table 1:

[0127] Table 1 Mineral aggregate gradation composition of fiber asphalt concrete

[0128]

[0129] S3. Perform preliminary screening and batching of the ore, dry the ore in an oven at 105°C, and then grade the ore with a sieve; in this embodiment, since the maximum particle size of the ore is 16 mm, the sieve hole sizes are determined to be 0.075 mm, 0.15 mm, 0.3 mm, 0.6 mm, 1.18 mm, 2.36 mm, 4.75 mm, 9.5 mm, 13.2 mm, and 16 mm. Determine the sieve hole size, and weigh the amount of ore required for each plate of material according to the specified mix ratio.

[0130] S4. Heat the raw materials of fiber asphalt concrete. Since asphalt is solid at room temperature, heat the selected asphalt to 140℃-150℃ to make it liquid and easy to flow; heat the selected aggregates, fillers and fibers to 170℃.

[0131] S5. Mixing fiber asphalt concrete: adding mineral material, fiber, asphalt and filler in sequence, and using a stirring device to stir the mixture to obtain fiber asphalt concrete.

[0132] The mixing process of fiber asphalt concrete is as follows:

[0133] S5.1, stirring the ore, pouring the selected limestone ore into the stirring cavity 7-1 through the aggregate feed port 7-2; starting the third motor 12, and driven by its output shaft, the threaded support column 2-1 starts to rotate, thereby driving the stirring cavity right ear 7-4 and the stirring cavity left ear 7-3 and the asphalt concrete mixing pot 7 to move upward to below the screen 8. Then start the first motor 4-1, drive the rotating assembly 4 to rotate, and stir the ore, and the stirring time is set to 60s.

[0134] S5.2, add fiber for stirring, and set the stirring time to 60s; start the first motor 4-1 to drive the rotating component 4 to rotate, and at the same time put the selected polyester fiber into the fiber feed port 5. The first motor 4-1 drives the main rotating rod 4-7 to rotate, and at the same time drives the first gear 4-2, the fiber dispersion umbrella surface 4-3, the connecting rod 9-2 and the annular rack 4-5 to rotate together. The first gear 4-2 is meshed with the second gear 9-1, so the rotation of the first gear 4-2 drives the second gear 9-1 to rotate together. The second gear 9-1 drives the connecting rod 9-2 and the fiber scattering brush 9-3 to rotate together. When the fiber passes through the fiber scattering brush 9-3, the clumped fiber can be fully broken up under the rotation of the brush 6-7. When the fiber continues to fall onto the fiber dispersion umbrella surface 4-3, under the action of centrifugal force and gravity, the fiber will slide toward the edge of the fiber dispersion umbrella surface 4-3. The fiber dispersion umbrella surface 4-3 is provided with a hollow opening, and the fiber can continue to fall through the hollow opening. The edge of the fiber dispersing umbrella surface 4-3 is at a certain distance from the wall of the protective cover 6. The fiber dispersing umbrella surface 4-3 with a hollow opening can achieve uniform distribution of fibers. The annular rack 4-5 is meshed with the third gear 6-4. Driven by the annular gear, the third gear 6-4 starts to rotate, thereby driving the fiber breaking rod to start rotating. The fiber breaking rod is provided with a "cross-shaped" columnar protrusion, and its position is located directly below the hollow opening of the fiber dispersing umbrella surface 4-3, which can further break up the fallen fibers and achieve secondary breaking up of the fibers. The fibers continue to fall onto the screen 8. If the fibers have been fully broken up, they can easily pass through the screen 8, otherwise they will stagnate on the screen 8.

[0135] S5.3, add asphalt for stirring, pour the selected Karamay 70# asphalt into the stirring chamber 7-1 through the aggregate feed port 7-2; start the first motor 4-1 to drive the rotating component 4 to rotate, stir the asphalt, fiber and mineral material, and set the stirring time to 60s.

[0136] S5.4, add filler for stirring, pour the selected limestone filler into the stirring chamber 7-1 through the aggregate feed port 7-2; start the first motor 4-1 to drive the rotating component 4 to rotate, stir the asphalt, fiber, mineral material and filler, and set the stirring time to 60s.

[0137] S6, loading and molding, start the third motor 12, driven by the third motor 12, the threaded support column 2-1 starts to rotate in the opposite direction, thereby driving the right ear 7-4 of the mixing chamber, the left ear 7-3 of the mixing chamber and the asphalt concrete mixing pot 7 to move downward as a whole. When the asphalt concrete mixing pot 7 falls to the bottom, the control feed plate 10-2 is taken out, and the fiber asphalt concrete falls into the discharge bin cylinder 10-3. Start the second motor 10-1, drive the rotating rod and the spiral surface 10-4 to rotate, and slowly push the fiber asphalt concrete out of the discharge bin cylinder 10-3 and put it into the experimental mold. Finally, compact and shape, and maintain.

[0138] S7, device cleaning, first, open the asphalt solvent injection valve 11-4 and the air valve 11-5. Close the asphalt solvent spray control valve 11-7. Inject the asphalt solvent from the asphalt solvent injection pipe 11-2. When the asphalt solvent storage box 11-1 is full, close the asphalt solvent injection valve 11-4, and connect the air compressor connecting pipe 11-3 to the air compressor compressed air. When the pressure value of the pressure gauge 11-6 reaches 0.5MPa, turn off the air compressor and the air valve 11-5. Then, start the first motor 4-1 to drive the rotating component 4 to rotate. At the same time, open the asphalt solvent spray control valve 11-7, and the asphalt solvent flows through the asphalt solvent pipeline 11-8 and is sprayed out from the asphalt solvent nozzle 11-9 to clean the material stirring paddle 4-6.

[0139] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A mixing device for hydraulic fiber asphalt concrete of earth-rock dam capable of evenly distributing fibers, comprising an asphalt concrete mixing pot (7) and a support plate (1) mounted on the top of a working frame, characterized in that: The support plate (1) is provided with a rotating assembly (4), which includes an externally fixed first motor (4-1), the output shaft of the first motor (4-1) being drivingly connected to a main rotating rod (4-7), and the bottom end of the main rotating rod (4-7) being fixedly connected to a material stirring paddle (4-6) matching the inner wall of the asphalt concrete mixing pot (7) for rotating and stirring the asphalt concrete; the outer side of the main rotating rod (4-7) is provided with a first gear (4-2), a fiber dispersion umbrella surface (4-3) and a strip connecting rod (4-4) in sequence from top to bottom, wherein the first gear (4-2) and the fiber dispersion umbrella surface (4-3) are both fixedly connected to the main rotating rod (4-7), a plurality of evenly distributed hollow openings are provided on the fiber dispersion umbrella surface (4-3), the outer end of the strip connecting rod (4-4) is fixedly connected to an annular rack (4-5), the fiber dispersion umbrella surface (4-3) and the protective cover cylinder (6-2) are coaxially distributed and a gap is reserved between the two; A protective cover (6) is coaxially distributed inside the working frame and between the support plate (1) and the asphalt concrete mixing pot (7); a fiber feed port (5) is arranged at the top axis of the protective cover (6), and a screen (8) is arranged between the protective cover (6) and the asphalt concrete mixing pot (7); The protective cover (6) is provided with a fiber scattering device (9), which comprises a plurality of connecting rods (9-2) distributed around the outside of the main rotating rod (4-7), and the main rotating rod (4-7) and the connecting rod (9-2) are both rotatably connected to the support plate (1), and the top and bottom ends of the connecting rod (9-2) are respectively fixedly connected to a second gear (9-1) and a fiber scattering brush (9-3), and the plurality of second gears (9-1) are all meshed with the first gear (4-2) for transmission; A secondary fiber-breaking rod (6-5) is movably arranged inside the protective cover (6), a "cross-shaped" columnar protrusion is arranged outside the secondary fiber-breaking rod (6-5) and directly below the hollow opening, and a third gear (6-4) meshing with the annular rack (4-5) is also fixedly connected to the outside of the secondary fiber-breaking rod (6-5); A fiber asphalt concrete discharge bin (10) is provided at the bottom of the asphalt concrete mixing pot (7), and the output end of the asphalt concrete mixing pot (7) is docked and matched with the input end of the fiber asphalt concrete discharge bin (10).

2. The mixing device for hydraulic fiber asphalt concrete of earth-rock dam capable of evenly distributing fibers according to claim 1 is characterized in that: The working frame comprises two hollow columns (2) which are parallel and symmetrically distributed at the bottom of the support plate (1), and a fixed support (3) is installed at the bottom end of the hollow column (2); The two sides of the screen (8) are respectively fixedly connected to the hollow columns (2) on both sides; An adjusting mechanism is installed on the hollow column (2) for moving the asphalt concrete mixing pot (7) in the vertical direction.

3. The mixing device for hydraulic fiber asphalt concrete of earth-rock dam capable of evenly distributing fibers according to claim 2, characterized in that: The adjustment mechanism comprises a threaded support column (2-1) and a threaded sleeve (2-2), wherein the threaded support column (2-1) is threadedly sleeved inside the threaded sleeve (2-2); A third motor (12) is embedded inside the fixed support (3), and an output shaft of the third motor (12) is drivingly connected to the threaded support column (2-1) for adjusting the height of the asphalt concrete mixing pot (7).

4. The mixing device for hydraulic fiber asphalt concrete of earth-rock dam capable of evenly distributing fibers according to claim 2, characterized in that: The protective cover (6) further comprises a protective cover top cover (6-1) and a protective cover cylinder (6-2), wherein the protective cover top cover (6-1) is buckled and arranged on the top of the protective cover cylinder (6-2), and the fiber feed port (5) is installed on the protective cover top cover (6-1) and penetrates the protective cover top cover (6-1), the protective cover cylinder (6-2) is arranged as a cylindrical structure with openings at both ends, and the screen (8) is blocked at the bottom of the protective cover cylinder (6-2); The secondary fiber breaking rod (6-5) is rotatably connected to the protective cover cylinder (6-2) via a bearing, and the other end of the secondary fiber breaking rod (6-5) is not in contact with the main rotating rod (4-7); The protective cover cylinder (6-2) is provided with observation windows (6-3) on both the front and rear sides; The left and right sides of the protective cover cylinder (6-2) are respectively fixedly connected with a protective cover left ear (6-8) and a protective cover right ear (6-9); Four right-angled triangular plates (6-6) are fixedly mounted on the upper inner wall of the protective cover cylinder (6-2), brushes (6-7) are mounted on the lower oblique edges of the right-angled triangular plates (6-6), and the ends of the brushes (6-7) are in contact with the upper surface of the fiber dispersion umbrella-shaped surface (4-3).

5. The mixing device for hydraulic fiber asphalt concrete of earth-rock dam capable of evenly distributing fibers according to claim 2, characterized in that: The asphalt concrete mixing pot (7) comprises a mixing chamber (7-1), the front and rear sides of the mixing chamber (7-1) are both provided with aggregate feed ports (7-2), the left and right sides of the mixing chamber (7-1) are respectively fixedly connected with a mixing chamber left ear (7-3) and a mixing chamber right ear (7-4), and the threaded sleeves (2-2) located on both sides are respectively detachably mounted with the mixing chamber left ear (7-3) and the mixing chamber right ear (7-4) by screws; The two hollow columns (2) are provided with mutually parallel rail grooves on opposite sides, and the combination of the stirring chamber left ear (7-3) or the stirring chamber right ear (7-4) and the threaded sleeve (2-2) is slidably connected to the rail grooves on both sides.

6. The mixing device for hydraulic fiber asphalt concrete of earth-rock dam capable of evenly distributing fibers according to claim 5, characterized in that: A cleaning assembly (11) is arranged outside the hollow column (2), and comprises an asphalt solvent storage box (11-1), and an asphalt solvent injection pipe (11-2) and an air compressor connecting pipe (11-3) are connected above the asphalt solvent storage box (11-1); The asphalt solvent storage box (11-1) is connected to an asphalt solvent pipeline (11-8) below, and a plurality of asphalt solvent nozzles (11-9) are vertically distributed at the output end of the asphalt solvent pipeline (11-8), and the positions of the asphalt solvent nozzles (11-9) match the material stirring paddle (4-6); The asphalt dissolving agent storage box (11-1) is equipped with a pressure gauge (11-6); The asphalt solvent injection pipe (11-2), the air compressor connecting pipe (11-3) and the asphalt solvent pipeline (11-8) are respectively provided with an asphalt solvent injection valve (11-4), an air valve (11-5) and an asphalt solvent spraying control valve (11-7).

7. The mixing device for hydraulic fiber asphalt concrete of earth-rock dam capable of evenly distributing fibers according to claim 6, characterized in that: The angle between the inclined surface of the fiber dispersion umbrella-shaped surface (4-3) and the horizontal plane is 20°; The number of the strip-shaped connecting rods (4-4) and the secondary fiber breaking rods (6-5) is set to eight, the eight strip-shaped connecting rods (4-4) and the secondary fiber breaking rods (6-5) are distributed in a ring array, and the angle between two adjacent strip-shaped connecting rods (4-4) or two adjacent secondary fiber breaking rods (6-5) is set to 45°.

8. The mixing device for hydraulic fiber asphalt concrete of earth-rock dam capable of evenly distributing fibers according to claim 1, characterized in that: The discharge bin (10) comprises a discharge bin cylinder (10-3), which is configured as a cylindrical structure with one end open, a feed bin opening (10-5) is provided at the top of the discharge bin cylinder (10-3) and directly below the output port of the stirring chamber (7-1), a control feed plate (10-2) is movably provided in the feed bin opening (10-5), a discharge bin rotating shaft (10-6) is rotatably connected to the inner axis of the discharge bin cylinder (10-3), and a spiral surface (10-4) matching the inner wall of the discharge bin cylinder (10-3) is fixedly connected to the outer side of the discharge bin rotating shaft (10-6), and a second motor (10-1) is fixedly connected to the closed end of the discharge bin cylinder (10-3), and the output shaft of the second motor (10-1) is drivingly connected to the discharge bin rotating shaft (10-6).

9. A method for preparing hydraulic fiber asphalt concrete for earth-rock dams that can make fibers evenly distributed, using a stirring device as described in any one of claims 1 to 8, characterized in that: The steps include: S1. Determine the raw materials of fiber asphalt concrete, including asphalt, aggregate, filler and fiber; S2. Determine the mix ratio of fiber asphalt concrete, including the asphalt-stone ratio, gradation index, filler dosage and fiber dosage; the mineral gradation adopts the following mineral gradation formula: Among them, d i is the mesh size of sieve i; p i The aperture is d i The passing rate of the sieve; p 0.075 is the filler dosage; r is the grading index; D max is the maximum particle size of the ore; S3. Perform preliminary screening and batching of the ore materials, dry them in an oven at 105℃, and then grade them with a sieve; determine the size of the sieve holes, and weigh out the amount of ore materials required for each plate of material according to the prescribed mix ratio; S4. Heating the raw materials of fiber asphalt concrete, heating the selected asphalt to 140°C-150°C to make it liquid and easy to flow; heating the selected aggregate, filler and fiber to 170°C; S5, stirring fiber asphalt concrete, adding mineral material, fiber, asphalt and filler in sequence, stirring the mixture by using a stirring device to obtain fiber asphalt concrete; S6, loading and molding, starting the third motor (12), driven by the output shaft of the third motor (12), the asphalt concrete mixing pot (7) moves downward as a whole; taking out the control feed plate (10-2), the fiber asphalt concrete falls into the discharge bin cylinder (10-3); starting the second motor (10-1), slowly pushing the fiber asphalt concrete out of the discharge bin cylinder (10-3) and putting it into the experimental mold; entering the next step of compaction molding and subsequent curing; S7. Clean the device. Inject the asphalt solvent from the asphalt solvent injection pipe (11-2). When the asphalt solvent storage box (11-1) is full, connect the air compressor to compress the air. When the pressure value of the pressure gauge (11-6) reaches 0.5MPa, turn off the air compressor and the air valve (11-5). Start the first motor (4-1) to drive the rotating component (4) to rotate. At the same time, open the asphalt solvent spray control valve (11-7). The asphalt solvent flows through the asphalt solvent pipeline (11-8) and is sprayed from the asphalt solvent nozzle (11-9) to clean the material stirring paddle (4-6).

10. The method for preparing hydraulic fiber asphalt concrete for earth-rock dam with uniform fiber distribution according to claim 9, characterized in that: The mixing process of the fiber asphalt concrete by the mixing device is as follows: S5.1, stirring the ore, pouring the selected ore into the stirring chamber (7-1) through the aggregate feed port (7-2); starting the third motor (12), and driven by the output shaft thereof, the stirring chamber (7-1) moves upward to below the screen (8); then starting the first motor (4-1), driving the rotating assembly (4) to rotate, stirring the ore, and setting the stirring time to 60 seconds; S5.2, adding fibers for stirring, starting the first motor (4-1) to drive the rotating assembly (4) to rotate, and at the same time, feeding the selected fibers into the fiber feed port (5), and setting the stirring time to 60 seconds; S5.3, adding asphalt for stirring, pouring the selected asphalt into the stirring chamber (7-1) through the aggregate feed port (7-2); starting the first motor (4-1) to drive the rotating component (4) to rotate, and setting the stirring time to 60s; S5.4, add filler and stir, pour the selected filler into the stirring chamber (7-1) through the aggregate feed port (7-2); start the first motor (4-1) to drive the rotating component (4) to rotate, and set the stirring time to 60s.

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