CN218365680U - Mixing apparatus is used in steel fiber concrete preparation - Google Patents

Abstract

The utility model discloses a mixing equipment for steel fiber concrete preparation, which comprises a belt conveyor and a steel fiber random adder, a support frame is fixed above the conveyor belt of the belt conveyor, and the steel fiber random adder is fixedly arranged On the support frame, it includes a feeding hopper, a screw conveyor, a horizontal distribution transfer pipe, an accelerated external thrower and a discharge cover that are connected in sequence, wherein the screw conveyor includes a spiral blade, and the horizontal distribution transfer The fibers are dispersed horizontally and slide into the accelerated outer thrower. The accelerated outer thrower has a built-in horizontal throwing drum. The throwing drum is driven to rotate by the throwing power source, and multiple rows of sweeping protrusions are arranged staggered on the peripheral surface. The cover is provided with a downward discharge port and a baffle plate facing the throwing direction of the accelerated outer thrower. The utility model belongs to the field of concrete preparation equipment. Compared with the prior art, the utility model has the advantage that the random distribution degree of steel fibers can be improved.

Description

A kind of mixing equipment for steel fiber concrete preparation

technical field

The utility model relates to the field of concrete preparation equipment, in particular to a mixing equipment for steel fiber concrete preparation.

Background technique

Steel fiber reinforced concrete is a new type of multiphase composite material formed by mixing random distributed short steel fibers into ordinary concrete. At present, the preparation of steel fiber concrete is only to add a discharge pipe for continuous discharge of steel fibers on the ordinary concrete conveying and mixing line, so that the steel fibers can fall on the concrete sand and gravel materials in batches or continuously for final mixing. The inventor thinks that for the quality of steel fiber reinforced concrete, the matrix strength (fm), the aspect ratio of fiber (the ratio of steel fiber length l and diameter d, i.e. I/d), the volume ratio of fiber (steel in steel fiber reinforced concrete The volume percentage of fibers), the bond strength between fibers and the matrix (τ), and the distribution and orientation of fibers in the matrix (η). Among these parameters, the addition of existing steel fibers obviously cannot meet the requirements of random distribution. The current method of addition causes the steel fibers to stack in the same direction, which affects the quality of the final steel fiber reinforced concrete. Therefore, the inventor proposes a mixing equipment for preparing steel fiber concrete, which can improve the degree of random distribution of steel fibers and is easy to install on existing equipment.

Contents of the invention

The technical problem to be solved by the utility model is to overcome the above technical defects and provide a mixing equipment for preparing steel fiber concrete that improves the degree of random distribution of steel fibers.

This design proposes a mixing equipment for steel fiber concrete preparation, including a belt conveyor and a steel fiber random adder, a support frame is fixed above the conveyor belt of the belt conveyor, and the steel fiber random adder It is fixedly arranged on the support frame, and includes a feeding funnel, a screw conveyor, a horizontal distribution transfer pipe, an accelerated external thrower and a discharge cover arranged sequentially, wherein the screw conveyor includes a The spiral blade is transported from the feeding hopper to the horizontal distributor, and the horizontal distribution transfer pipe is used to disperse the steel fiber horizontally and slide it into the accelerated external thrower. The accelerated external thrower has a built-in horizontal throwing drum. The throwing drum is driven to rotate by the throwing power source, and multiple rows of sweeping protrusions are arranged staggeredly on the peripheral surface, and the discharge cover is provided with a downward discharge port and a barrier plate facing the direction of the accelerated outer thrower. .

Further, the horizontal distribution transition pipe includes a connected circular pipe section and a rectangular pipe section, wherein the circular pipe section is connected to the screw conveyor, the rectangular pipe section is connected to the accelerated external thrower, and the long side and the Describe the axial level of the throwing drum.

Further, the horizontal position of the rectangular pipe section is lower than that of the circular pipe section.

Further, the barrier plate is perpendicular to the tangential direction of rotation of the throwing drum.

Further, the axial direction of the helical blade is parallel to the upper surface of the conveyor belt.

Further, the pushing surface of the sweeping protrusion is a concave surface.

After the above-mentioned structure is adopted, the utility model has the advantages compared with the prior art: this scheme adds a steel fiber random adder on the basis of the belt conveyor, and the steel fiber random adder carries out material feeding through the screw conveyor. The continuous quantitative delivery, and the horizontal distribution of the transfer pipe is used to improve the uniformity in the horizontal direction. Finally, the outer thrower is thrown out by accelerating the thrower, so that the steel fibers collide or rotate and fall, and disperse and fall on the sand and gravel materials to achieve mixing and adding. This scheme can improve the degree of random distribution of steel fibers in concrete, thereby improving production quality.

Description of drawings

Fig. 1 is a front perspective schematic diagram of a mixing equipment for preparing steel fiber concrete of the present invention.

Fig. 2 is a rear view schematic diagram of a mixing equipment for preparing steel fiber concrete of the present invention.

Fig. 3 is a schematic top view of a steel fiber random adder of a mixing equipment for preparing steel fiber concrete according to the utility model.

Fig. 4 is a schematic diagram of the internal structure of a steel fiber random adder of a mixing equipment for preparing steel fiber concrete according to the present invention.

Fig. 5 is a three-dimensional schematic diagram of a throwing drum of a mixing equipment for preparing steel fiber concrete according to the present invention.

As shown in the figure: 1. Belt conveyor, 2. Steel fiber random adder, 3. Support frame, 4. Conveyor belt, 5. Feeding funnel, 6. Screw conveyor, 7. Horizontal distribution transfer pipe, 8. Accelerated external thrower, 9. Discharge cover, 10. Rack, 11. Spiral blade, 12. Throwing drum, 13. Throwing power source, 14. Sweeping protrusion, 15. Discharge port, 16 , barrier plate, 17, circular pipe section, 18, rectangular pipe section, 19, mixing outlet, 20, gravel inlet, 21, first shell, 22, transmission power source, 23, second shell.

Detailed ways

The following descriptions are only preferred embodiments of the utility model, and do not limit the scope of protection of the utility model. The utility model will be further described below in conjunction with the accompanying drawings and embodiments.

Embodiment 1, as shown in Figure 1-5:

This embodiment proposes a mixing equipment for preparing steel fiber concrete, which includes a belt conveyor 1 and a steel fiber random adder 2 .

Wherein, described belt conveyor 1 is common equipment of existing concrete production line, referring to Fig. 1, 2, gravel belt conveyor 1 comprises frame 10, and described frame 10 is provided with inclined conveyer belt 4, wherein A gravel inlet 20 is provided at a lower position, a mixing outlet 19 is provided at a higher position, and a support frame 3 is fixed in the middle of the frame 10, and the steel fiber is fixed to the adder 2 randomly. Set on the support frame 3.

The steel fiber random adder 2 can continuously or intermittently discharge the steel fibers in a random direction. It is sequentially connected with the provided feeding funnel 5, screw conveyor 6, horizontal distribution transfer pipe 7, accelerated external thrower 8 and discharge cover 9. Wherein, referring to FIGS. 3 and 4 , the screw conveyor 6 includes a first shell 21 and a screw blade 11 . The first shell 21 is fixedly connected with the fixing frame, its front end is fixedly connected to the feeding funnel 5 upwards, and its rear end is connected to the horizontal distribution transfer pipe 7 . In the first shell 21, one or more said helical blades 11 are pivotally arranged, and the helical blades 11 are driven by the conveying power source 22 arranged at the front end, so that the steel fiber can be controlled by controlling the rotating speed of the conveying power source 22 The speed of discharge. And the axial direction of the screw blade 11 is parallel to the upper surface of the conveyor belt 4, which can prevent the material from sliding out of the screw conveyor 6 automatically.

The horizontal distribution transition pipe 7 includes a connected circular pipe section 17 and a rectangular pipe section 18 . Wherein, the circular pipe section 17 is connected with the screw conveyor 6, the rectangular pipe section 18 is connected with the accelerated external thrower 8, and the horizontal position of the rectangular pipe section 18 is lower than the horizontal position of the circular pipe section 17 . When using like this, when steel fiber enters rectangular pipe section 18 from circular pipe section 17, it can be dispersed in the horizontal direction and slides in the accelerated outer throwing device 8, because sand and gravel are also tiled on the conveyor belt 4, so it can improve The distribution uniformity of steel fibers in the horizontal direction.

Referring to Figures 4 and 5, the accelerated external thrower 8 includes a second shell 23 and a throwing drum 12. The front side of the second shell 23 communicates with the horizontal distribution transfer pipe 7, and the rear side is provided with an outlet. The throwing drum 12 is horizontally pivotally installed in the second shell 23 , and a throwing power source 13 is fixedly arranged outside the second shell 23 to drive the throwing drum 12 to rotate. A plurality of rows of sweeping protrusions 14 are staggeredly arranged on the peripheral surface of the throwing drum 12, and the sweeping protrusions 14 can sweep the inside of the second shell 23, and throw the steel fibers out from the discharge port 15, thereby achieving the goal of throwing materials. Effect. In order to enhance the throwing uniformity and throwing amount, it is designed to be multi-row staggered and the pushing surface of the sweeping protrusion 14 is a concave surface.

The discharge cover 9 controls the falling direction of the steel fibers that are thrown randomly, so it is provided with a downward discharge port 15, and in order to increase the random distribution of the steel fibers, it is facing the acceleration of the external thrower 8. A barrier plate 16 is arranged in the direction, and the barrier plate 16 is perpendicular to the rotation tangent direction of the throwing drum 12, so the steel fibers will collide with the barrier plate 16 and fall in disorder.

During specific use, the steel fibers are stored through the feeding funnel 5, and the concrete gravel is transported through the conveyor belt 4. When adding steel fibers, the discharge amount and discharge rate of steel fibers are controlled by the screw conveyor 6 so that they meet the design value of the bending and tensile strength of steel fiber concrete. When the filler is mixed, the steel fiber is thrown out by the rotation of the conveying throwing drum 12, so that it keeps chaotic when it falls into the conveyor belt 4, and the stacking is reduced as little as possible, thereby improving the quality of the concrete.

The utility model and its implementation have been described above. This description is not restrictive. What is shown in the drawings is only one implementation of the utility model, and the actual structure is not limited thereto. All in all, if a person of ordinary skill in the art is inspired by it, without departing from the purpose of the utility model, without creatively designing a structural method and embodiment similar to the technical solution, it shall be protected by the utility model scope.

Claims (6)

1. A kind of mixing equipment for steel fiber concrete preparation, it is characterized in that: comprise belt conveyor (1) and steel fiber random to adder (2), the conveyer belt (4) of described belt conveyor (1) A support frame (3) is fixed above, and the steel fiber chaotic adder (2) is fixedly arranged on the support frame (3), and includes a feeding funnel (5), a screw conveyor ( 6), the horizontal distribution transfer pipe (7), the accelerated external thrower (8) and the discharge cover (9), wherein the screw conveyor (6) comprises To the spiral blade (11) of the horizontal distributor, the horizontal distribution transition pipe (7) is used to disperse the steel fiber horizontally and slide into the accelerated external thrower (8), and the accelerated external thrower (8) has a built-in A horizontal throwing drum (12), the throwing drum (12) is driven to rotate by a throwing power source (13), and a plurality of rows of sweeping protrusions (14) are staggeredly arranged on the peripheral surface, and the discharge cover ( 9) A downward discharge port (15) and a barrier plate (16) facing the throwing direction of the accelerated outer thrower (8) are provided. 2. A kind of mixing equipment for steel fiber concrete preparation according to claim 1, characterized in that: the horizontal distribution transfer pipe (7) comprises a connected circular pipe section (17) and a rectangular pipe section (18), wherein the The circular pipe section (17) is connected with the screw conveyor (6), the rectangular pipe section (18) is connected with the accelerated external thrower (8), and the long side and the shaft of the throwing drum (12) to the level. 3. The mixing equipment for preparing steel fiber concrete according to claim 2, characterized in that: the horizontal position of the rectangular pipe section (18) is lower than the horizontal position of the circular pipe section (17). 4 . The mixing equipment for steel fiber concrete preparation according to claim 1 , characterized in that: the barrier plate ( 16 ) is perpendicular to the tangential direction of rotation of the throwing drum ( 12 ). 5. The mixing equipment for preparing steel fiber concrete according to claim 1, characterized in that: the axial direction of the spiral blade (11) is parallel to the upper surface of the conveyor belt (4). 6. The mixing equipment for preparing steel fiber concrete according to claim 1, characterized in that: the pushing surface of the sweeping protrusion (14) is a concave surface.

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