A new large-scale UHPC fiber dispersion metering machine

Abstract

The application discloses a novel large-quantity UHPC fiber dispersing and metering machine, which comprises a flat pushing hopper, a pushing frame, a dispersing hopper, a dispersing stirring frame, a dropping hopper, a weighing sensor, a machine frame and a control box, the flat pushing hopper is arranged above the machine frame, the pushing frame is arranged above the left side of the flat pushing hopper, the dispersing hopper is arranged above the dispersing stirring frame, the dispersing stirring frame is arranged on the right side of the flat pushing hopper, the dropping hopper is arranged below the dispersing stirring frame, the weighing sensor is arranged between the flat pushing hopper and the machine frame, the control box is arranged on the front side of the machine frame, and a protective cover is arranged on the left side of the flat pushing hopper. The novel large-quantity UHPC fiber dispersing and metering machine is characterized in that a novel quantitative feeding mode formed by the pushing hopper and the pushing frame is adopted, so that the fibers can be uniformly sent to the dispersing hopper according to the proportioning weight, and the fibers can be effectively dispersed into individual entities, the uniform dispersion and accurate metering of the fibers are realized, the production process of the UHPC is optimized, and the overall performance of the concrete is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the field of UHPC concrete forming technology, and particularly relates to a novel large-quantity UHPC fiber dispersing and metering machine. BACKGROUND

[0002] In the field of concrete engineering, ultra-high performance concrete (UHPC for short) has become the first choice for many large and special projects due to its excellent durability, mechanical properties close to steel structures, and excellent wear resistance and blast resistance. UHPC is a kind of engineering material with the best durability, and the mechanical properties of UHPC with proper reinforcement are close to those of steel structures. In addition, UHPC has excellent wear resistance and blast resistance. Therefore, UHPC is particularly suitable for use in large-span bridges, blast-resistant structures and thin-walled structures, and in high-abrasion and high-corrosion environments. However, although UHPC has many advantages, the dispersion and metering of fibers in the preparation process still face challenges. UHPC has been applied in some practical projects, such as large-span pedestrian bridges, highway and railway bridges, thin-walled silos, nuclear waste tanks, steel cable anchoring reinforcement plates, ATM protective shells and the like. The incorporation of fibers into UHPC results in very excellent mechanical properties, and the bending resistance, tensile resistance, shear resistance and fracture toughness of UHPC are significantly higher than those of traditional reinforced concrete.

[0003] Fibers are an important component of UHPC, and uniform dispersion is crucial to ensure the performance of UHPC. Since the original state of fibers is three-dimensional random clumping, direct incorporation into concrete can cause fiber clumping, which not only affects production efficiency, but also negatively affects the overall strength of the concrete. Traditional fiber dispersing and feeding equipment, such as vibrating screens, has low production efficiency and poor dispersion effect, and cannot meet the production needs of UHPC. In addition, the amount of fiber added during the production of UHPC also needs to be accurately controlled, and the existing feeding methods cannot guarantee uniform dispersion and accurate metering of fibers, which directly affects the overall performance of the concrete. Since fibers are in a three-dimensional random clumping state when they leave the factory, incorporating them into concrete in their original state can cause fiber clumping, and fibers are very hard to handle. In order to ensure production safety, production equipment and processes need to avoid direct human contact. Most of the current fiber dispersing and feeding equipment uses vibrating screens, and the planar screen of the vibrating screen has low production efficiency and poor dispersion effect, and cannot be matched with the production line of the mixing station. Fibers cannot be fully dispersed and directly fed into the concrete, which can cause fiber clumping and affect the overall strength of the concrete. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a new large quantity UHPC fiber dispersion metering machine, which solves the problems of inconvenience in adding fiber at the mixing station, uniform dispersion and accurate metering of fiber, optimization of the production process of UHPC, difficulty in controlling the amount of addition, and the inability of the added fiber to uniformly disperse to affect the overall strength of the concrete.

[0005] To achieve the above object, the present application is implemented by the following technical scheme: a new large quantity UHPC fiber dispersion metering machine, comprising a flat pushing hopper, a pushing frame, a dispersion hopper, a dispersion stirring frame, a material falling hopper, a weighing sensor, a rack and a control box, the flat pushing hopper is arranged above the rack and is used for storing unpacked fiber, the pushing frame is arranged above the left side of the flat pushing hopper and is used for uniformly conveying the fiber in the flat pushing hopper to the dispersion stirring frame, the dispersion hopper is arranged above the dispersion stirring frame and is similar to a stirring cylinder and is used for restraining the fiber from splashing everywhere during stirring in the cylinder, the dispersion hopper is formed by bending a thin steel plate after programming cutting, an observation window is arranged at the front end of the dispersion hopper for facilitating manual maintenance and observation of the working state, the dispersion stirring frame is arranged on the right side of the flat pushing hopper, the material falling hopper is arranged below the dispersion stirring frame and is used for collecting the dispersed fiber, the weighing sensor is arranged between the flat pushing hopper and the rack and is used for metering the weight of the fiber fed into the mixer, the control box is arranged on the front side of the rack and is used for controlling the opening and closing of the dispersion stirring frame and the pushing frame and for processing the data of the weighing sensor, a protective cover is mounted on the left side of the flat pushing hopper.

[0006] Preferably, the dispersion stirring frame further comprises a dispersion comb tooth main shaft, dispersion combs and a reduction box motor, a plurality of dispersion combs are fixed on the dispersion comb tooth main shaft in a circumferential direction, the reduction box motor is arranged on the right side of the control box and is connected with one side of the dispersion comb tooth main shaft, the reduction box motor is used for providing power for the dispersion stirring frame and changing the rotating speed, the dispersion combs are arranged at the lower position of the right end of the flat pushing hopper, the control box is arranged on the front side of the rack and is used for changing the rotating speed of the dispersion stirring frame, the reduction box motor is arranged on the right side of the control box, and the reduction box motor is electrically connected with the control box.

[0007] Preferably, the flat pushing hopper comprises a hopper side plate, a hopper bottom plate and a hopper support frame, the hopper side plate is formed by welding a groove steel profile after laser cutting; the hopper bottom plate is a 10mm thick steel plate which is formed by welding a square tube profile after laser cutting; the hopper support frame is formed by welding a square tube profile and is welded to the lower part of the hopper bottom plate and is used for supporting the flat pushing hopper, the flat pushing hopper is formed by welding two sets of hopper side plates and one set of hopper bottom plates and forms a hopper assembly, the space of which can be made into two, three or four square sizes according to the square quantity requirement, which is convenient for storing unpacked fiber material, and the flat pushing hopper is a square flat hopper with an inclination of 10°, which can avoid the natural collapse of the fiber due to gravity and thus cause metering errors.

[0008] Preferably, the push frame further comprises a left sliding seat, a right sliding seat, a transmission screw rod, a reverser, a transmission shaft and a speed reducer motor, the push frame is movably fixed in the channel steel guide rail of the side plate of the flat push hopper through the left sliding seat and the right sliding seat at two ends, the lower ends of the left sliding seat and the right sliding seat are fixed on the screw nut of the transmission screw rod through screws, the transmission screw rod is connected through the reverser and the transmission shaft, and the hollow shaft speed reducer motor is arranged on the transmission shaft.

[0009] Preferably, the dispersion hopper is fixed above the dispersion stirring frame and is in the shape of a stirring cylinder, is used for restraining fibers to be stirred in the cylinder and cannot be splashed everywhere, is formed by bending after programming cutting of a thin steel plate, is provided with an observation window at the front end, and can facilitate manual maintenance and observation of the working state.

[0010] Preferably, the blanking hopper is a square material cylinder welded from a thin steel and is in the shape of a tapered guide, is used for collecting dispersed fibers, and the angle design meets the requirement that fibers cannot accumulate when freely falling.

[0011] Preferably, the weighing sensor is a pressure shear bridge type sensor with an accuracy of ±0.1 kg and is used for measuring the weight of fibers fed into the stirrer.

[0012] Preferably, the rack is used for supporting and fixing the flat push hopper, the dispersion hopper and the dispersion stirring frame.

[0013] Preferably, the control box is electrically connected with the speed reducer motor, the speed reducer box motor and the weighing sensor, is used for controlling the opening and closing of the movement of the dispersion stirring frame and the push frame, and is used for controlling the processing of data of the weighing sensor.

[0014] The application provides a novel large-quantity UHPC fiber dispersion metering machine.

[0015] 1. The novel large-quantity UHPC fiber dispersion metering machine is provided with a novel quantitative feeding mode formed by a push hopper and a push frame, so that fibers can be uniformly fed to the dispersion hopper according to the proportioning weight and are effectively dispersed into individual entities, so that the fibers are uniformly dispersed and distributed in the UHPC stirred and formed, and the whole process is controlled by the control box, and the operation is simple.

[0016] 2. The novel large-quantity UHPC fiber dispersion metering machine is provided with a dispersion stirring frame, a dispersion comb tooth main shaft, dispersion combs and a speed reducer box motor, the fibers are thrown upward and then are dispersed by using the free fall mode, and the dispersion efficiency of the fibers is effectively improved relative to the general dispersion mode of using a vibrating screen.

[0017] 3、The new large quantity UHPC fiber dispersion metering machine adopts the mode of dispersing the fibers after being hit upward, effectively improves the dispersion effect of the fibers adhered together, improves the fiber dispersion effect, prevents the fibers from adhering together to block the dispersion efficiency, and can prevent the grouped fibers from being added to the concrete to affect the quality of the concrete. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole schematic view of the new large quantity UHPC fiber dispersion metering device.

[0019] Figure 2 It is an internal sectional view structural schematic view of the new large quantity UHPC fiber dispersion metering device.

[0020] Figure 3 It is a rack structure schematic view of the new large quantity UHPC fiber dispersion metering device.

[0021] Figure 4 It is a flat push hopper structure schematic view of the new large quantity UHPC fiber dispersion metering device.

[0022] Figure 5 It is a push rack, left slide seat and right slide seat installation structure schematic view of the new large quantity UHPC fiber dispersion metering device.

[0023] Figure 6 It is a transmission screw rod and transmission shaft structure schematic view of the new large quantity UHPC fiber dispersion metering device.

[0024] Figure 7 It is a dispersion stirring device structure schematic view of the new large quantity UHPC fiber dispersion metering device.

[0025] The marks in the drawings are described as follows:

[0026] 1, flat push hopper; 2, push rack; 21, left slide seat; 22, right slide seat; 23, transmission screw rod; 24, reverser; 25, transmission shaft; 26, speed reducer motor; 3, dispersion hopper; 4, dispersion stirring rack; 41, dispersion comb main shaft; 42, dispersion comb; 43, speed reducer motor; 5, material falling hopper; 6, weighing sensor; 7, rack; 8, control box; 9, protective cover. DETAILED DESCRIPTION

[0027] The application will be further described below in combination with the drawings and examples.

[0028] Please refer to Figures 1-7This invention provides a technical solution: a novel large-volume UHPC fiber dispersion metering machine, comprising a flat-push hopper 1, a pusher frame 2, a dispersion hopper 3, a dispersion mixing rack 4, a discharge hopper 5, a weighing sensor 6, a frame 7, and a control box 8. The flat-push hopper 1 is positioned above the frame 7 and is used to store unpacked fibers. The pusher frame 2 is positioned above the left side of the flat-push hopper 1 and is used to quantitatively and evenly transport the fibers from the flat-push hopper 1 to the dispersion mixing rack 4. The dispersion hopper 3 is positioned above the dispersion mixing rack 4 and, similar to a mixing drum, is used to constrain the fibers to be stirred within the drum, preventing them from spreading. The splashing and dispersing hopper is made of thin steel plate that has been programmed, cut, and bent. It has an observation window at the front end for easy manual inspection and observation of its working status. The dispersing and mixing rack 4 is located on the right side of the flat pushing hopper 1, and the dropping hopper 5 is located below the dispersing and mixing rack 4 to collect the dispersed fibers. The weighing sensor 6 is located between the flat pushing hopper 1 and the frame 7 to measure the weight of the fibers fed into the mixer. The control box 8 is located on the front side of the frame 7 to control the opening and closing of the dispersing and mixing rack 4 and the push rack 2, and to control the processing of the data from the weighing sensor 6. A protective cover 9 is installed on the left side of the flat pushing hopper 1.

[0029] In this embodiment, the dispersing and mixing rack 4 also includes a dispersing comb main shaft 41, dispersing combs 42, and a gearbox motor 43; multiple dispersing combs 42 are circumferentially and evenly fixed on the dispersing comb main shaft 41, the gearbox motor 43 is located on the right side of the control box 8 and connected to one side of the dispersing comb main shaft 41, the gearbox motor 43 is used to provide power to the dispersing and mixing rack 4 and change the rotation speed, the dispersing combs 42 are located at the lower right end of the flat push hopper 1, the control box 8 is located on the front side of the frame 7 to change the rotation speed of the dispersing and mixing rack 4, the gearbox motor 43 is located on the right side of the control box 8, and the gearbox motor 43 is electrically connected to the control box 8.

[0030] Specifically, the dispersing and mixing rack 4 is driven by a motor to rotate, thereby dispersing the clumps of fibers and preventing them from agglomerating and becoming unevenly mixed into the concrete.

[0031] In this embodiment, the flat-push hopper 1 includes a hopper side plate, a hopper bottom plate, and a hopper support frame. The hopper side plate is formed by laser cutting and welding with channel steel profiles. The hopper bottom plate is a 10mm thick steel plate formed by laser cutting and welding with square tube profiles. The hopper support frame is formed by welding square tube profiles together and is welded to the lower part of the hopper bottom plate to support the flat-push hopper 1. The flat-push hopper 1 is formed by splicing and welding two sets of hopper side plates and one set of hopper bottom plates to form a hopper assembly. The flat-push hopper 1 is a square flat hopper with an inclination of 10°, which can avoid the fiber from collapsing naturally due to gravity, thus avoiding measurement errors.

[0032] Specifically, the flat push hopper 1 can be made into two, three, four or other sizes according to the square quantity requirement, which is convenient for storing the unpacked fiber material. The inclined design can avoid the natural collapse of the fiber due to gravity, thereby avoiding the measurement error.

[0033] In the embodiment, the push frame 2 further comprises a left sliding seat 21, a right sliding seat 22, a transmission screw rod 23, a reverser 24, a transmission shaft 25 and a hollow shaft reduction motor 26. The push frame 2 is movably fixed in the channel steel guide rail of the side plate of the flat push hopper 1 through the left sliding seat 21 and the right sliding seat 22 at both ends. The lower ends of the left sliding seat 21 and the right sliding seat 22 are fixed on the screw rod nut of the transmission screw rod 23 by screws. The transmission screw rod 23 is connected through the reverser 24 and the transmission shaft 25. The hollow shaft reduction motor 26 is arranged on the transmission shaft 25.

[0034] Specifically, when the reduction motor 26 rotates, it drives the transmission shaft 25 to drive the reverser 24 to make the transmission screw rod 23 rotate. When the transmission screw rod 23 rotates, it drives the screw rod nut to move linearly along the axial direction, thereby driving the push frame 2 to move linearly along the axial direction.

[0035] In the embodiment, the dispersion hopper 3 is fixed above the dispersion stirring frame 4.

[0036] Specifically, the dispersion hopper 3 is in the shape of a stirring cylinder, which is used to constrain the fiber stirring in the cylinder and will not splash everywhere. It is formed by bending a thin steel plate after programming cutting. An observation window is arranged at the front end, which can facilitate manual maintenance and observation of the working state. In the embodiment, the blanking hopper 5 is a square material cylinder welded by a thin steel into a conical guide.

[0037] Specifically, the blanking hopper 5 is used to collect the dispersed fiber, and the angle design conforms to the condition that the fiber will not accumulate when it freely falls.

[0038] In the embodiment, the weighing sensor 6 is a pressure shear bridge type sensor.

[0039] Specifically, the accuracy of the weighing sensor 6 is ±0.1 kg, which is used to measure the weight of the fiber put into the mixer.

[0040] In the embodiment, the rack 7 is used to support and fix the flat push hopper 1, the dispersion hopper 3 and the dispersion stirring frame 4.

[0041] Specifically, the rack 7 supports and installs the mounting positions of each device.

[0042] In the embodiment, the control box 8 is electrically connected with the reduction motor 26, the reduction box motor 43 and the weighing sensor 6 respectively.

[0043] Specifically, the control box 8 is used to control the movement of the dispersion stirring frame 4 and the pushing frame 2 to be opened or closed, and is used to control the processing of the data of the weighing sensor 6, the number of which is 4, the upper end of which is fixed on the bottom frame of the flat pushing hopper 1, and the lower end of which is fixed on the frame 7, the weighing sensor 6 being electrically connected with the control box 8, the control box 8 being a microcomputer controlled PLC circuit control system, the metering mode adopting subtraction metering, that is, the control box 8 automatically records the weight of the fiber at the initial feeding, after setting the feeding weight required to be dispersed to the stirring machine, the control box 8 controls the speed reducer motor 26 of the pushing frame 2 and the speed reducer box motor 43 of the dispersion stirring frame 4 to start the automatic conveying and dispersion work, and when the weight in the flat pushing hopper 1 is reduced to the set feeding value, the machine automatically stops working.

[0044] Working principle: The flat pushing hopper 1 stores a large amount of fibers in a piled and bunched state, the left side of the flat pushing hopper 1 is the pushing frame 2 which can move linearly to the right, when the speed reducer motor 26 rotates, it drives the transmission shaft 25 to drive the commutator 24 to make the transmission screw rod 23 rotate, when the transmission screw rod 23 rotates, it pushes the screw nut to move linearly along the axial direction, thereby driving the pushing frame 2 to move linearly along the axial direction, when the pushing frame 2 moves to the right, it pushes the fibers in the flat pushing hopper 1 to move to the right, by adjusting the speed of the speed reducer motor 26, the feeding speed of the fibers can be controlled, so as to ensure that the fibers in the flat pushing hopper 1 can be uniformly and quantitatively conveyed to the dispersion stirring frame 4, when the fibers are conveyed to the dispersion hopper 3 by the pushing frame 2 and freely fall on the dispersion comb 42 of the dispersion stirring frame 4, the dispersion comb 42 is driven to rotate clockwise by the motor, the fibers are thrown upward to form a free falling state, thereby dispersing the fibers, after setting the feeding weight required to be dispersed to the stirring machine, the control box 8 automatically controls the speed reducer motor 26 of the pushing frame 2 and the speed reducer box motor 43 of the dispersion stirring frame 4 to start the automatic conveying and dispersion work, and when the weight in the flat pushing hopper 1 is reduced to the set feeding value, the machine automatically stops working, thereby completing the work of dispersing and quantitatively feeding the fibers.

[0045] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel large-volume UHPC fiber dispersion metering machine, comprising a flat-push hopper (1), a pusher frame (2), a dispersion hopper (3), a dispersion stirring frame (4), a discharge hopper (5), a weighing sensor (6), a frame (7), and a control box (8), characterized in that: The flat hopper (1) is located above the frame (7) and is used to store unpacked fibers. The pusher (2) is located above the left side of the flat hopper (1) and is used to quantitatively and evenly transport the fibers to the dispersing and mixing rack (4). The dispersing hopper (3) is located above the dispersing and mixing rack (4) and is shaped like a mixing barrel. It is used to constrain the fibers to be stirred inside the barrel and prevent them from splashing everywhere. The dispersing and mixing rack (4) is located on the right side of the flat hopper (1). The dropping hopper (5) is located below the dispersing and mixing rack (4) and is used to collect the dispersed fibers. The weighing sensor (6) is located between the flat hopper (1) and the frame (7) and is used to measure the weight of the fibers put into the mixer. The control box (8) is located on the front side of the frame (7) and is used to control the opening or closing of the dispersing and mixing rack (4) and the pusher (2) and to control the processing of the data from the weighing sensor (6). A protective cover (9) is installed on the left side of the flat hopper (1). The dispersing and mixing rack (4) also includes a dispersing comb spindle (41), dispersing combs (42), and a gearbox motor (43); multiple dispersing combs (42) are evenly fixed on the dispersing comb spindle (41) in the circumferential direction. The gearbox motor (43) is located on the right side of the control box (8) and connected to one side of the dispersing comb spindle (41) to provide power to the dispersing and mixing rack (4) and change the rotation speed. The dispersing combs (42) are located at the lower right end of the flat push hopper (1). The control box (8) is located on the front side of the frame (7) to change the rotation speed of the dispersing and mixing rack (4). The gearbox motor (43) is located on the right side of the control box (8) and is electrically connected to the control box (8). The push frame (2) also includes a left slide (21), a right slide (22), a transmission screw (23), a commutator (24), a transmission shaft (25), and a geared motor (26). The push frame (2) is movably fixed in the channel steel guide rail of the side plate of the flat push hopper (1) through the left slide (21) and the right slide (22) at both ends. The lower ends of the left slide (21) and the right slide (22) are fixed to the screw nut of the transmission screw (23) with screws. The transmission screw (23) is connected to the transmission shaft (25) through the commutator (24). A hollow shaft geared motor (26) is provided on the transmission shaft (25).

2. The novel high-volume UHPC fiber dispersion metering machine according to claim 1, characterized in that: The flat-push hopper (1) includes a hopper side plate, a hopper bottom plate, and a hopper support frame; the hopper side plate is formed by laser cutting and welding with channel steel profile.

3. The novel high-volume UHPC fiber dispersion metering machine according to claim 2, characterized in that: The hopper bottom plate is a 10mm thick steel plate that is laser-cut and welded to a square tube profile; the hopper support frame is a square tube profile that is welded together and welded to the lower part of the hopper bottom plate to support the flat-push hopper (1).

4. The novel high-volume UHPC fiber dispersion metering machine according to claim 1, characterized in that: The flat-push hopper (1) is formed by splicing and welding two sets of hopper side plates and one set of hopper bottom plates to form a hopper assembly. Its space can be made into two, three or four square dimensions according to the volume requirements, which is convenient for storing unpacked fiber materials. The flat-push hopper (1) is a square flat hopper with an inclination of 10° to avoid the fiber from collapsing naturally due to gravity, which would lead to measurement errors.

5. A novel high-volume UHPC fiber dispersion metering machine according to claim 1, characterized in that: The hopper (5) is a square material cylinder welded from thin steel into a conical guide.

6. A novel high-volume UHPC fiber dispersion metering machine according to claim 1, characterized in that: The weighing sensor (6) is a pressure shear bridge sensor.

7. A novel high-volume UHPC fiber dispersion metering machine according to claim 1, characterized in that: The frame (7) is used to support and fix the flat push hopper (1), the dispersing hopper (3) and the dispersing and mixing rack (4).

8. A novel high-volume UHPC fiber dispersion metering machine according to claim 1, characterized in that: The control box (8) is electrically connected to the geared motor (26), the gearbox motor (43), and the weighing sensor (6), respectively.

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