CN114905629B - Steel fiber concrete forming device - Google Patents

Abstract

The invention relates to a steel fiber concrete forming device, which comprises: a steel fiber feeding bin; the dispersing mechanism is positioned below the steel fiber feeding bin and is of a conical structure, the tip end of the dispersing mechanism faces the steel fiber feeding bin, the included angle between the generatrix of the dispersing mechanism and the horizontal plane is the natural repose angle of the steel fiber, and the conical structure is provided with a plurality of blanking channels; and (3) a transition bin: the concrete feeding device is arranged below the dispersing mechanism, a transition channel communicated with the blanking channel is arranged in the dispersing mechanism, the dispersing mechanism is also communicated with the concrete feeding bin, and the discharging ends of the transition channels are arranged along the array; the forming device can ensure that steel fibers are uniformly dispersed in concrete, and improve the quality of the steel fiber concrete.

Description

A steel fiber reinforced concrete molding device

technical field

The invention relates to the technical field of concrete preparation equipment, in particular to a steel fiber concrete forming device.

Background technique

The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

Ultra-high performance concrete is a cement-based composite material with ultra-high mechanical properties, good durability and toughness. Utilizing these characteristics of ultra-high-performance concrete materials to replace traditional concrete for pavement, bridge deck pavement and prefabricated bridge components can improve the strength, stiffness, fatigue resistance and crack resistance of components and structures.

The proportion of ultra-high performance concrete usually includes fiber, and steel fiber has a significant impact on the good mechanical properties and durability of ultra-high performance concrete. Steel fibers can restrain the deformation of ultra-high performance concrete and prevent the development of cracks near the fibers, thereby improving the durability of ultra-high performance concrete. The crack resistance effect of steel fibers is affected by the direction and uniformity of fiber distribution. Steel fibers parallel to the direction of tensile stress can maximize the restraint and bridging effect on deformation and crack development. The uniform distribution of fibers in ultra-high-performance concrete can significantly reduce the "defects" under stress, and improve the overall crack resistance of components or structures. At the same time, in ultra-high performance concrete, the cost of steel fibers accounts for a large part of the total cost. Reducing the amount of steel fibers can greatly reduce material costs and improve economy. However, the inventors found that due to the high viscosity of the ultra-high performance concrete itself, it is difficult to control the direction of the fibers during the mixing process, and it is not easy to disperse evenly. Therefore, the existing stirring method has the problem of being unable to control the direction and uniformity of fiber distribution.

For example, the patent application with the publication number CN106378857A discloses a forming device for steel fiber directional reinforced ultra-high performance concrete and its application method. The steel fiber is oriented by a magnetic field. However, the steel fiber is directly added to the concrete by the barrel, and the concrete Uniform dispersion cannot be achieved in the medium, which in turn leads to the quality of steel fiber reinforced concrete being affected.

Contents of the invention

The object of the present invention is to overcome the deficiencies of the prior art and provide a steel fiber concrete forming device, which ensures the uniform dispersion and fiber direction of steel fibers in concrete and improves the quality of steel fiber concrete.

To achieve the above object, the present invention adopts the following technical solutions

Embodiments of the present invention provide a steel fiber concrete forming device, comprising:

Steel fiber feed bin;

Dispersion mechanism, located below the steel fiber feeding bin, is a conical structure, its tip is set towards the steel fiber feeding bin, and the angle between its busbar and the horizontal plane is the natural angle of repose of the steel fiber, and the conical structure is equipped with multiple blanking channels ;

Transition chamber: located below the dispersing mechanism, there is a transition passage connected with the blanking passage inside, and also connected with the concrete feed chamber, and the discharge ends of multiple transition passages are arranged along the array;

Directional mixing mechanism, its feed end is connected with the discharge end of the corner bin and is provided with steel fiber orientation components.

Optionally, along the direction from the center to the edge of the dispersing mechanism, the size of the discharge channel becomes gradually larger.

Optionally, the dispersing mechanism includes a cylindrical part and a conical part fixed on the top surface of the cylindrical part. Correspondingly, the discharge channel includes a first discharge part located in the conical part and a second discharge part located in the cylindrical part. The first blanking part has a cylindrical structure, the second blanking part has a tapered structure, and the end with a larger area is connected to the first blanking part.

Optionally, the directional mixing mechanism is arranged obliquely downwards, including a steel fiber directional mechanism and a mixing mechanism connected in sequence. The steel fiber directional mechanism is provided with a first steel fiber directional component for orienting the steel fibers. The mixing mechanism is used for The fibers are mixed with the concrete.

Optionally, the included angle between the directional mixing mechanism and the horizontal plane is 30°-60°.

Optionally, the steel fiber orientation mechanism includes a first outer cylinder and a first inner cylinder located in the first outer cylinder, the first inner cylinder is provided with a steel fiber orientation channel, and the feed end of the steel fiber orientation channel transitions to the steel fiber The discharge end of the channel is connected, the feed end of the first inner cylinder is connected with the discharge end of the transition chamber, the discharge end of the first inner cylinder and the rigid fiber orientation channel are connected with the mixing mechanism, the first outer cylinder and the first inner cylinder The space between the barrels is provided with a first magnetic field coil.

Optionally, the cross section of the steel fiber orientation channel is a square, and the side length thereof is longer than the length of the steel fiber.

Optionally, the mixing mechanism includes a second outer cylinder and a second inner cylinder, the second outer cylinder is fixed to the first outer cylinder, the second inner cylinder is fixed to the first inner cylinder, and the second outer cylinder and the second inner cylinder are fixed. The space is provided with a second magnetic field coil

Optionally, a vibrator is further arranged between the second outer cylinder and the second inner cylinder.

Optionally, a reinforcement mesh is arranged at the feeding port of the concrete feeding bin.

Beneficial effects of the present invention:

1. The steel fiber concrete molding device of the present invention has a dispersing mechanism of a conical structure, which can disperse the steel fibers dropped from the steel fiber feed bin, and the angle between the busbar of the conical structure and the horizontal plane is the natural angle of repose of the steel fibers , it can ensure that steel fibers fall into each blanking channel and have roughly the same thickness, and enter the transition channel through the blanking channel respectively to achieve uniform dispersion of steel fibers. Since the discharge end of the transition channel is distributed along the array, it can The steel fiber is guided, so that the steel fiber is mixed with the concrete in the form of an array, which ensures that the steel fiber is evenly dispersed in the concrete and improves the quality of the steel fiber concrete.

2. In the steel fiber concrete molding device of the present invention, since the steel fiber enters the middle blanking passage preferentially, the size of the blanking opening gradually increases along the direction from the center of the dispersing mechanism to the edge, so that the steel fiber can better flow toward the edge. Peripheral dispersion is used to offset the uneven distribution caused by the different positions of the blanking channels, to achieve approximately equal delivery of steel fibers in each blanking channel, and to ensure the uniformity of steel fiber distribution.

3. In the steel fiber concrete molding device of the present invention, the cross section of the steel fiber directional passage is a square, and the square cross section is mainly considered to adjust the three-dimensional direction of the space. In any direction, the steel fibers can be distributed at any position on the cross section, which not only can Improve the uniformity of steel fibers, and maximize the utilization of channels.

4. In the steel fiber concrete forming device of the present invention, a second magnetic field coil is also arranged in the mixing mechanism, which can avoid that after the steel fiber is mixed with the concrete, the steel fiber will change relative to the previously adjusted direction and deviate from the set value, thereby ensuring Orientation effect of steel fibers.

5. The steel fiber concrete molding device of the present invention is provided with a vibrator. Since the ultra-high performance concrete cannot generate an interactive orientation effect solely by a magnetic field, the vibrator is provided to vibrate the steel fiber concrete to improve the orientation effect.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application and not to limit the present application.

Fig. 1 is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

Fig. 2 is the schematic diagram of explosion of the steel fiber feeding bin, the supporting bin wall, and the dispersing mechanism in Embodiment 1 of the present invention;

Fig. 3 is the front view of the dispersing mechanism of Embodiment 1 of the present invention;

Fig. 4 is the bottom view of the dispersing mechanism of Embodiment 1 of the present invention;

Fig. 5 is a schematic diagram 1 of the explosion of the dispersing mechanism in Embodiment 1 of the present invention;

Fig. 6 is the explosion schematic diagram II of the dispersing mechanism in Embodiment 1 of the present invention;

Fig. 7 is a schematic structural diagram of the transition chamber in Embodiment 1 of the present invention;

Figure 8 is a schematic diagram of the explosion of the transition chamber in Embodiment 1 of the present invention;

Fig. 9 is a schematic diagram of the steel fiber orientation mechanism in Embodiment 1 of the present invention;

Figure 10 is a schematic diagram of the explosion of the steel fiber orientation mechanism in Embodiment 1 of the present invention;

Fig. 11 is a comparison diagram of the distribution of steel fibers in a steel fiber directional channel with a circular cross-section and a steel fiber directional channel with a square cross-section;

Figure 12 is a schematic diagram of the mixing mechanism of Embodiment 1 of the present invention;

Figure 13 is a schematic diagram of the explosion of the mixing mechanism in Embodiment 1 of the present invention;

Among them, 1. Frame body, 2. Steel fiber feeding bin, 3. Concrete feeding bin, 4. Dispersion mechanism, 6. Transition bin, 6. Traveling wheel, 7. Steel fiber orientation mechanism, 8. Mixing mechanism, 9 .Support warehouse wall, 10. Power supply, 11. Guide groove;

4-1. Cylindrical part, 4-2. Conical part, 4-3. First blanking part, 4-4. Second blanking part;

5-1. Side silo wall, 5-2. First feed silo wall, 5-3. Second feed silo wall, 5-4. Open end, 5-5. Transition channel;

7-1. The first outer cylinder, 7-2. The first inner cylinder, 7-3. The steel fiber directional channel, 7-4. The first magnetic field coil;

8-1. Second outer cylinder, 8-2. Second inner cylinder, 8-3. Second magnetic field coil.

Detailed ways

Example 1

This embodiment provides a steel fiber concrete forming device, as shown in Figure 1, comprising a frame body 1, on which a steel fiber feed bin 2, a concrete feed bin 3, a dispersion mechanism 4, and a transition bin 5 are installed And the directional mixing mechanism, the frame body 1 is used as the load-bearing part of other structures, and the bottom end of the frame body is provided with walking wheels 6, which facilitates the movement of the whole device.

A dispersion mechanism 4 and a concrete feed bin 3 are connected above the transition bin 5, and a steel fiber feed bin 2 is arranged above the dispersion mechanism 4, and the concrete input from the concrete feed bin 3 enters the interior of the transition bin 5, and the steel fiber feed bin 2 The steel fibers are put into the interior, and the steel fibers are introduced into the dispersing mechanism 4, and the dispersing mechanism 4 disperses the input steel fibers, and the dispersed steel fibers are introduced into the transition channel inside the transition chamber 5, and then introduced into the directional mixing mechanism through the transition channel, and enter The concrete in the transition chamber 5 is introduced into the directional mixing mechanism from the outer space of the transition passage, and the directional mixing mechanism includes a steel fiber orientation mechanism 7 and a mixing mechanism 8 arranged in sequence, and the steel fiber orientation mechanism 7 is provided with a steel fiber orientation mechanism communicating with the transition passage. Passage and orientation part, the steel fiber can be oriented in the steel fiber orientation passage under the action of the orientation part, and the steel fiber orientation passage is sent to the mixing mechanism 8, and the concrete sent by the steel fiber orientation mechanism from the transition chamber can enter the mixing Mechanism 8, mixes with the steel fibers that enter the mixing mechanism 8 orientation.

Specifically, the frame body 1 is made of a plurality of steel beams, and includes a rectangular bottom frame. Walking wheels 6 are installed at the four corners of the bottom frame, and a plurality of supporting columns are arranged on the bottom frame for supporting the steel fiber Feed bin 2, concrete feed bin 3, transition bin 5, directional mixing mechanism, etc.

As shown in Figure 2, the steel fiber feeding bin 2 includes four deflectors, the four deflectors form an inverted frustum-shaped structure, and the bottom end is used as the discharge port of the steel fiber. With this arrangement, it is possible to The steel fiber poured into the steel fiber feeding bin is introduced into the dispersing mechanism. The four deflectors are supported by four supporting walls 9, which are respectively the first wall, the second wall, the third wall and the fourth wall, wherein the first wall and the second wall are oppositely arranged. In the shape of an inverted trapezoid, the third warehouse wall and the fourth warehouse wall are arranged between the ends of the first warehouse wall and the second warehouse wall. The tops of the four deflectors are respectively fixedly connected with the tops of the four supporting walls.

As shown in Figures 3-6, the dispersing mechanism 4 adopts a conical structure, located directly below the discharge port of the inverted conical structure formed by the deflector, and its tip is set towards the discharge port of the steel fiber feed bin.

The steel fibers falling on the dispersing mechanism 4 can be dispersed by using the conical surface of the conical structure. The conical structure is provided with multiple blanking channels, and the steel fibers falling on the dispersing mechanism can enter the transition chamber through the blanking channels.

The dispersing mechanism 4 includes a cylindrical part 4-1 and a conical part 4-2 arranged on the upper surface of the cylindrical part. Second drop 4-4 inside the cylindrical part.

The first blanking part 4-3 adopts a cylindrical structure, one end extends to the conical surface of the conical part 4-2, and the other end extends to the bottom surface of the conical part 4-2, and the second blanking part 4-4 adopts a gradual The shrinking structure, the end with a larger area is connected to the first blanking part 4-3, and the end with a smaller area extends to the bottom surface of the cylindrical part 4-1. Through the second blanking part 4-4, the steel fibers can be further collected, so that the steel fibers can be sent out conveniently.

The included angle between the generatrix of the conical part 4-2 and the horizontal plane is equal to the natural angle of repose of the steel fibers, which can be obtained in advance according to experiments. With this setting, it can ensure that steel fibers will fall into each blanking channel, avoiding the accumulation of steel fibers in the middle when they fall and accumulate, and then ensuring that the steel fiber accumulation thickness at each blanking channel is roughly the same, thereby realizing The uniformity of steel fiber dispersion is ensured.

In this embodiment, multiple groups of blanking channels are provided, and multiple groups of blanking channels are radially distributed along the circumference of the conical portion 4-2. A blanking channel is provided at the center of the conical portion 4-2, and the other groups of blanking channels Multiple material channels are provided, and multiple blanking channels are arranged at equal intervals.

Due to the location advantage of the blanking channel in the middle of the conical part 4-2, the steel fiber preferentially enters the blanking channel in the middle, which will also cause the uneven distribution of the number of steel fibers in different channels. Therefore, in this embodiment, along the conical From the center of the center to the edge, the diameter of the blanking channel gradually increases to offset the uneven distribution caused by the position, so that the steel fibers can be better dispersed to the periphery after falling, and the steel fibers can be distributed in each channel. Equal delivery further ensures the uniformity of steel fiber dispersion.

In order to prevent the steel fibers from flowing out of the device, the dispersing mechanism in this embodiment is set inside the space surrounded by four supporting walls, and the four walls are used to prevent the steel fibers from flowing out of the device.

One side of the steel fiber feeding bin 2 is provided with a concrete feeding bin 3 for adding concrete. The sundries enter the concrete feeding bin, resulting in blockage of the subsequent transition bin and the circulation channel of the directional mixing mechanism.

Both the steel fiber feed bin 2 and the concrete feed bin 3 are arranged above the transition bin 5, the feed end of the transition bin is used to receive steel fibers and concrete, and its discharge end is connected to a directional mixing mechanism arranged obliquely downward. In this embodiment, the included angle between the directional mixing mechanism and the horizontal plane is 30°-60°, through the transition chamber, the steel fiber and concrete flowing vertically from the steel fiber feed bin and the concrete feed bin into Angled flow direction to fit directional mixing mechanism.

Specifically, as shown in Figures 7-8, the transition bin includes two side bin walls 5-1, a first feed bin wall 5-2 is arranged between the two side bin walls, and a second feed bin wall The wall 5-3 also has an open end 5-4 as the discharge end, and a bottom silo wall is also provided between the two side silo walls, and the bottom silo wall is inclined downward so that the concrete can Outflow transition bin 5, the first feeding bin wall 5-2 is fixedly connected with the bottom end of the dispersing mechanism 4 and the four supporting bin walls 9 of the steel fiber feeding bin, which is provided with a plurality of steel pipes matching the blanking channel. The fiber feeding port, the second feeding bin wall is fixedly connected with the bottom end of the concrete feeding bin, and is provided with a concrete feeding port, and the open end of the transition bin is connected with the feeding end of the directional mixing mechanism.

A transition channel 5-5 is provided in the transition chamber for converting the vertically falling steel fibers into the same flow direction as that of the directional mixing mechanism.

The transition channel 5-5 is made of a pipeline, and its feeding end is arranged at the steel fiber feeding port of the first feed bin wall, so that the transition channel communicates with the blanking channel of the dispersing mechanism.

The discharge end of the transition channel 5-5 extends to the open end of the transition chamber, and the discharge ends of multiple transition channels are arranged in a rectangular array in the plane where the open end of the transition chamber is located.

Since the blanking channel of the dispersing mechanism 4 is a plurality of groups of channels distributed along the circumference, the feeding ends of the multiple transition channels 5-5 are arranged in a circular array, and the discharge ends of the multiple transition channels 5-5 are arranged in a rectangular array. Arrangement, so the transition channel 5-5 includes an arc segment and a straight line segment, and the change in the arrangement form of the transition channel is satisfied through the arc end, and the straight line segment is set obliquely downward, so that the steel fiber can be transported under the action of its own gravity .

The directional mixing mechanism includes a steel fiber directional mechanism 7 and a mixing mechanism 8 arranged in sequence.

As shown in Figures 9-10, the steel fiber orientation mechanism 7 is connected to the open end of the transition chamber 5, including a first outer cylinder 7-1 and a first inner cylinder 7-2, the size of the first outer cylinder 7-1 Matching the size of the open end of the transition chamber 2, in this embodiment, the feeding ends of the first outer cylinder 7-1 and the first inner cylinder 7-2 are fixed on the support plate provided on the edge of the open end of the transition chamber, The inside of the first inner cylinder 7-2 is provided with a plurality of steel fiber directional passages 7-3, the steel fiber directional passages 7-3 are made of pipes, and its feed end is connected with the transition passage 5-5 in the transition chamber 5, and the transition The steel fiber in the channel 5-5 can enter the steel fiber orientation channel under the action of its own gravity.

In this embodiment, the cross-section of the steel fiber orientation channel 7-3 is a square, and its side length is slightly greater than the length of the steel fiber. This arrangement is mainly to consider that when adjusting the three-dimensional direction of space, in any direction, the steel fiber can Distributing at any position on the cross-section can not only improve the uniformity of steel fibers, but also maximize the utilization of the channels.

As shown in Figure 11, if a circular cross-section is used, the steel fibers can only gather at the center of the cross-section, which is not conducive to the uniform distribution of steel fibers. At the same time, there are no steel fibers at the edge of the cross-section, which reduces the utilization efficiency of the cross-section. When , the steel fiber can be located at any position in the section, which improves the uniformity of the steel fiber and the utilization of the section.

Since the section of the steel fiber directional channel 7-3 is a square, in order to realize the connection between the steel fiber directional channel 7-3 and the transition channel 5-5, the discharge end section of the transition channel 5-5 is also a square, in this embodiment , as the cross-sectional shape of the transition passage 5-5 directly transitions from a circle to a square, in another embodiment, a pipe with a square cross-section is connected to the end of the transition passage 5-5 to realize the connection with the steel fiber directional passage connect.

A cavity is formed between the first outer cylinder 7-1 and the first inner cylinder 7-2, and the first magnetic field coil 7-4 is arranged in the cavity, and the first magnetic field coil 7-4 is used as an orientation component, and the first magnetic field coil 7-4 is connected with the power supply 10 fixed on the outer surface of the first outer cylinder, and the power supply 10 can energize the first magnetic field coil 7=4, thereby generating a magnetic field. The steel fibers are oriented such that the steel fibers turn to a pre-set direction.

As shown in Figures 11-12, the mixing mechanism 8 includes a second outer cylinder 8-1 and a second inner cylinder 8-2, and the discharge end surface of the second outer cylinder 8-1 and the first outer cylinder 7-1 Fixed, the second inner cylinder 8-2 is fixed to the discharge end surface of the first inner cylinder 7-2.

The steel fibers in the steel fiber orientation channel 7-3 and the concrete in the first inner cylinder 7-2 can flow into the second inner cylinder 8-2 at the same time, and mixing takes place in the second inner cylinder 8-2.

The discharge end of the second inner cylinder 8-2 is provided with a diversion groove 11, and the mixed steel fiber concrete flows out from the diversion groove 11 for pouring.

In order to prevent the steel fiber from being adjusted in the direction of the steel fiber when it is mixed with the concrete and deviate from the set value, a second magnetic field coil is provided in the space between the second outer cylinder 8-1 and the second inner cylinder 8-2 8-3, the second magnetic field coil 8-3 is connected to the power supply 10 arranged on the outer surface of the first outer cylinder 7-1, and can apply a magnetic field force to the steel fibers in the second inner cylinder 8-2 to prevent its direction from changing .

Due to the high viscosity of concrete, especially ultra-high performance concrete, the magnetic field alone cannot produce a good orientation effect, therefore, a vibrator 8 is arranged in the space between the second outer cylinder 8-1 and the second inner cylinder 8-2 -4, the vibrator 8-4 is installed on the surface of the outer cylinder of the second inner cylinder 8-2 to vibrate the steel fiber concrete to improve the magnetic field orientation effect.

The working method of this embodiment is:

Steel fibers are put into the steel fiber feeding bin 2, and concrete is put into the concrete feeding bin 3. The steel fibers fall on the conical surface of the dispersion structure 4 under the action of the four deflectors to disperse. The feed channel enters the transition channel 5-5 in the transition storehouse 5, and the concrete dropped into the concrete feed storehouse 3 enters the space outside the transition storehouse 5 transition channel 5-5.

The steel fiber enters the steel fiber directional channel 7-3 from the transition channel 5-5 under the action of its own gravity. Since the discharge end of the transition channel 5-5 is distributed in an array, the outflowing steel fibers are also arranged in an array, which can be evenly distributed. Arranged inside the concrete, the concrete in the transition chamber 5 flows into the first inner cylinder 7-1 of the steel fiber orientation mechanism 7 under the action of its own gravity, and flows into the space outside the steel fiber orientation channel.

The energized first magnetic field coil 7-4 generates a magnetic field force, and under the action of the magnetic field force, the steel fibers in the steel fiber orientation channel 7-3 rotate to a set direction.

The steel fiber and concrete enter the second inner cylinder 8-2 of the mixing mechanism 8 under the action of their own gravity to mix to form steel fiber concrete, and the steel fiber concrete flows out through the diversion groove 11 for pouring.

Since the steel fibers flowing out from the steel fiber directional channels are arranged in a rectangular array, they can be evenly dispersed inside the concrete, ensuring the performance of the steel fiber concrete.

Although the specific implementation of the present invention has been described above in conjunction with the accompanying drawings, it is not a limitation to the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, those skilled in the art do not need to pay creative work Various modifications or variations that can be made are still within the protection scope of the present invention.

Claims (5)

1. A steel fiber concrete forming apparatus, comprising:

a steel fiber feeding bin;

the dispersion mechanism is positioned below the steel fiber feeding bin and is of a conical structure, the tip end of the dispersion mechanism faces the steel fiber feeding bin, the included angle between the bus and the horizontal plane of the dispersion mechanism is the natural repose angle of the steel fiber, the conical structure is provided with a plurality of blanking channels, and the size of the blanking channels gradually increases along the direction from the center of the dispersion mechanism to the edge;

the dispersing mechanism comprises a cylindrical part and a conical part fixed on the top surface of the cylindrical part, and correspondingly, the blanking channel comprises a first blanking part positioned in the conical part and a second blanking part positioned in the cylindrical part, the first blanking part is of a cylindrical structure, the second blanking part is of a tapered structure, and the end part with larger area is connected to the first blanking part;

and (3) a transition bin: the concrete feeding device is arranged below the dispersing mechanism, a transition channel communicated with the blanking channel is arranged in the dispersing mechanism, the dispersing mechanism is also communicated with the concrete feeding bin, and the discharging ends of the transition channels are arranged along the array;

the feeding end of the directional mixing mechanism is connected with the discharging end of the corner bin and is provided with a steel fiber directional component;

the directional mixing mechanism is obliquely arranged downwards and comprises a steel fiber directional mechanism and a mixing mechanism which are sequentially connected, the steel fiber directional mechanism is provided with a first steel fiber directional component and is used for directional steel fibers, and the mixing mechanism is used for mixing the steel fibers with concrete;

the steel fiber orientation mechanism comprises a first outer cylinder and a first inner cylinder positioned in the first outer cylinder, a steel fiber orientation channel is arranged in the first inner cylinder, a feeding end of the steel fiber orientation channel is communicated with a discharging end of a steel fiber transition channel, the feeding end of the first inner cylinder is connected with a discharging end of a transition bin, the discharging ends of the first inner cylinder and the steel fiber orientation channel are both connected with the mixing mechanism, and a first magnetic field coil is arranged in a space between the first outer cylinder and the first inner cylinder;

the mixing mechanism comprises a second outer cylinder and a second inner cylinder, the second outer cylinder is fixed with the first outer cylinder, the second inner cylinder is fixed with the first inner cylinder, and a second magnetic field coil is arranged in a space between the second outer cylinder and the second inner cylinder.

2. A steel fibre concrete forming apparatus as claimed in claim 1 wherein the angle of the directional mixing means to the horizontal is 30 ° -60 °.

3. A steel fibre concrete forming apparatus as claimed in claim 1 wherein the steel fibre orientation channels are square in cross section with sides longer than the length of the steel fibres.

4. The steel fiber reinforced concrete molding apparatus as recited in claim 1, wherein a vibrator is further provided between the second outer cylinder and the second inner cylinder.

5. A steel fibre concrete forming apparatus as claimed in claim 1 wherein a reinforcing mesh is provided at the feed opening of the concrete feed bin.