Pouring device for manufacturing fiber oriented concrete ditch cover plate

Abstract

The utility model provides a pouring device for manufacturing a fiber directional concrete ditch cover plate, which comprises a hopper, a plurality of fiber directional concrete ditch cover plates, a plurality of fiber directional concrete ditch cover plates, a plurality of fiber directional concrete ditch cover plates, a plurality of fiber directional concrete ditch cover plates and a plurality of fiber directional concrete ditch cover plates, the outlet is formed in the tail end of the discharging part and is used for introducing the concrete into a mold; the bottom plate is of a flat plate structure and is used as a mounting platform of the device; the transverse guide rails are arranged on two sides of the bottom plate in parallel; the longitudinal guide rail is arranged above the device, is arranged in the front-back direction and is higher than the transverse guide rail; the plurality of sliding blocks comprise a longitudinal sliding block for connecting the hopper with the longitudinal guide rail and a transverse sliding block for connecting the longitudinal guide rail with the transverse guide rail; and the mold is arranged above the bottom plate between the transverse guide rails and is used for molding the ditch cover plate. Compared with traditional disorderly distributed fibers, the device enables the fibers to fully play a role in the effective stress direction through flow induction, so that the fibers in the concrete cover plate are directionally arranged, and the mechanical contribution of the fibers can be maximized.

Description

Technical Field

[0001] This utility model relates to the technical field of concrete drainage ditch cover production equipment, and more specifically to a casting device for making fiber-oriented concrete drainage ditch covers. Background Technology

[0002] Concrete is an engineering material with high compressive strength, low cost, and good durability, widely used in bridge components, road components, municipal facilities, and other fields. To further improve the toughness and load-bearing capacity of concrete, steel fibers or polymer fibers are usually incorporated into it to form fiber-reinforced composite materials. In existing technologies, concrete fibers are mostly randomly distributed, relying mainly on vibration, gravity, or the mixing state for natural distribution. The fibers in ordinary fiber-reinforced concrete exhibit random distribution. When concrete components are subjected to directional forces (e.g., a drainage ditch cover subjected to lateral bending), the mechanical contribution of the fibers is small, resulting in low utilization and directly affecting the design dimensions of the component, thus leading to low economic efficiency. Drainage ditch covers are typical directional load-bearing components. If the fibers in the concrete cover can be oriented, the mechanical contribution of the fibers can be maximized. Currently, there is a lack of simple and easy-to-implement pouring equipment that can induce fiber directional alignment during concrete pouring, suitable for mass production of high-flexural-strength concrete drainage ditch covers with effectively oriented fibers. Therefore, there is an urgent need for a device that can achieve directional fiber distribution during the casting process to solve the problem of low fiber utilization in the existing process. Utility Model Content

[0003] In view of this, the present invention provides a casting device for manufacturing fiber-oriented concrete drainage ditch covers.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A casting device for manufacturing fiber-oriented concrete trench covers includes: a hopper having an inlet, a discharge section, and a discharge section for receiving and guiding the flow of concrete mixture; an outlet located at the end of the discharge section for introducing concrete into a mold; a base plate, which is a flat plate structure and serves as an installation platform for the device; transverse guide rails arranged parallel to both sides of the base plate; longitudinal guide rails located above the device, arranged in the front-back direction, and higher than the transverse guide rails; a plurality of sliders, including a longitudinal slider connecting the hopper and the longitudinal guide rails, and a transverse slider connecting the longitudinal guide rails and the transverse guide rails; and a mold located above the base plate between the transverse guide rails for forming the trench cover.

[0006] In the preferred technical solution, the hopper is arranged at an angle, with the inlet located at the top and surrounded by flat plates that slope outwards on all four sides to facilitate feeding from above; the discharge section is a square cylindrical structure with a transverse guide structure with an arc surface on one side of the bottom, so that the overall cross-section of the discharge section is "L" shaped to guide the directional flow of the mixture.

[0007] In the preferred embodiment, the discharge section is an arc-shaped narrow channel structure with inwardly curved arc surfaces on both sides, which makes the flow velocity of the concrete in the middle faster than that on both sides during the flow process, thereby inducing the fibers to oriented in the flow direction.

[0008] In a preferred embodiment, the hopper is slidably connected to a longitudinal guide rail via a longitudinal slider, enabling it to move back and forth along the longitudinal guide rail.

[0009] In a preferred embodiment, the longitudinal guide rail is connected to a transverse slider at both ends, and the transverse slider can slide left and right on the transverse guide rail, thereby driving the hopper to move two-dimensionally in the horizontal plane.

[0010] In a preferred embodiment, the mold is detachable and replaceable, and is used to form drainage ditch covers of different shapes and specifications to meet different application requirements.

[0011] In a preferred embodiment, the hopper can slide along the transverse and longitudinal guide rails, forming a controllable two-dimensional movement path. This allows it to move at a uniform speed above the mold while continuously discharging and pouring concrete. First, it moves longitudinally back and forth, then laterally left and right, ensuring that the concrete is evenly distributed within the mold.

[0012] In a preferred embodiment, the base plate is provided with a limiting device for positioning the mold and preventing it from moving during the pouring process.

[0013] As can be seen from the above technical solution, compared with the prior art, the present invention has the following beneficial technical effects:

[0014] By guiding the orderly movement of the hopper above the mold and utilizing the internal flow-guiding structure, concrete is directed to flow in a predetermined direction within the mold. This induces the fibers in the mixture to align directionally in the main stress direction of the concrete cover, improving its crack resistance and load-bearing capacity. Compared to the disordered distribution of fibers in traditional concrete, this device uses flow induction to ensure the fibers fully exert their effect in the main stress direction. This allows for a reduction in fiber content and material costs while meeting strength requirements, maximizing the mechanical contribution of the fibers in the concrete cover by ensuring their directional alignment. The hopper achieves precise two-dimensional planar movement through the cooperation of transverse and longitudinal guide rails, suitable for controlling the pouring path, ensuring uniform filling within the mold, and avoiding localized accumulation or voids. The entire machine consists of a base plate, slide rails, sliders, hopper, and other conventional mechanical structures. Its simple manufacturing process facilitates processing and assembly, making it suitable for widespread application in small and medium-sized precast plants. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure of the hopper.

[0018] Figure 3 This is a side view of the hopper structure.

[0019] Reference numerals: 1. Hopper; 11. Feed inlet; 12. Discharge section; 13. Discharge section;

[0020] 2. Exit; 3. Base plate; 4. Horizontal guide rail; 5. Vertical guide rail; 41. Horizontal slider; 51. Vertical slider; 6. Mold. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0022] In the description of this application, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] This utility model provides a casting device for manufacturing fiber-oriented concrete drainage ditch covers, which can be used to manufacture fiber-oriented concrete drainage ditch covers, such as... Figure 1-3 As shown, it mainly includes:

[0025] The hopper 1 is a welded steel plate structure, inclined overall, with an inlet 11 at the top, sloping outwards on all four sides for easy top feeding. Below the inlet 11 is the discharge section 12, a rectangular cylindrical structure made of stainless steel or wear-resistant steel plate. A transverse guide channel is provided on one side of the discharge section 12, making the entire cross-section of the discharge section "L"-shaped, which helps guide the directional flow of the mixture. The lower end connects to the discharge section 13, a converging arc surface structure with inwardly curved surfaces on both sides, forming a velocity gradient. The velocity in the middle is greater than on the sides, inducing directional flow of the steel fibers inside the mixture. The discharge section 12 and discharge section 13 work together to form secondary induction; the discharge section 12 provides vertical induction, while the discharge section 13 provides horizontal induction. The outlet 2 is located at the bottom of the discharge section 13, and the port can be equipped with an adjustable valve or baffle to control the discharge flow rate. The base plate 3 is a flat plate structure made of carbon steel or reinforced concrete, serving as the base of the device. Its upper part is equipped with a mold installation area and a guide rail installation groove.

[0026] The transverse guide rails 4 are fixed on both sides of the base plate 3, arranged in pairs, and are of a sliding rail structure. They are made of high-strength alloy steel or aluminum alloy profiles, and the surface is hardened to ensure sliding stability. A transverse slider 41 is provided on each slider, on which rollers or slider grooves can be installed to connect with the longitudinal guide rails 5. The longitudinal guide rails 5 are arranged in pairs, located above the device, parallel to the base plate 3 but higher than the transverse guide rails 4, and arranged along the front-back direction of the mold 6. They are used to support and guide the forward and backward movement of the hopper 1. Both ends are fixedly connected to the transverse sliders 41. The longitudinal slider 51 is installed on the longitudinal guide rails 5 and can slide back and forth on them. It is fixedly connected to the hopper 1 by bolts or pins, allowing the hopper 1 to move along the guide rail with the slider. The mold 6 is located in the middle area of ​​the base plate 3, with both sides between the transverse guide rails 4. The mold 6 is made of high-strength steel or resin molds, has limiting grooves and locking devices, and can be replaced with different specifications as needed. The interior can be equipped with flow-guiding channels or protrusions to guide the directional flow of concrete. A limiting device, installed on the base plate 3, fixes the mold 6 to prevent it from shifting during the pouring process.

[0027] Furthermore, it is recommended that the hopper 1 and guide rail be made of stainless steel (304 / 316) or high-strength wear-resistant steel, with polished surfaces to reduce concrete adhesion; the base plate 3 can be made of welded carbon steel plate or precast concrete slab; all sliding parts 41 and 51 should be equipped with nylon sliding pads or roller bearing structures to reduce friction; the mold 6 can be a metal mold, wooden mold or resin composite mold depending on the size of the molded part, with smooth inner wall treatment, and a release agent injection port if necessary.

[0028] Furthermore, the overall working principle of the device is as follows: First, the mold 6 is installed at a designated position on the base plate 3 and fixed by a limiting device; freshly mixed concrete is poured into the top inlet 11 of the hopper 1, and the mixture flows sequentially along the feeding section 12 and the discharge section 13 under the guidance of gravity and the hopper structure; due to the arc-shaped structure design of the discharge section 13, the flow velocity in the middle is faster than that on both sides during the flow of the mixture, thus forming a velocity gradient field, which promotes the chopped steel fibers to align in the direction of the flow; the operator manually or through an electric drive mechanism controls the hopper 1 to move back and forth along the longitudinal guide rail 5 to achieve fixed-point linear pouring; after the longitudinal pouring is completed, the hopper 1 moves along the transverse guide rail 4. Move a certain distance and start pouring the next row again; the entire mold 6 is gradually filled by a two-dimensional stepping method of "longitudinal movement - lateral displacement - longitudinal movement", so as to ensure that each section of concrete flow can form a better fiber orientation state; after the concrete containing fibers flows out of the hopper 1, the internal fibers are oriented. This is because the hopper 1 has a unique arc design and is double arc. The cross-sectional size of the hopper 1 becomes smaller at the arc. When the concrete containing fibers flows through the arc, the flow velocity is high in the middle and low on both sides. The fibers are deflected under the influence of the concrete matrix, making the fibers parallel to the flow direction, that is, flow-induced orientation occurs. This utility model features two arc-shaped designs that allow for secondary fiber orientation. The first arc-shaped structure, formed at the connection between the feeding section 12 and the discharge section 13, provides vertical orientation. The second arc-shaped structure, with narrowed arc surfaces on both sides of the discharge section 13, provides horizontal orientation. This design first induces vertical deflection and then horizontal deflection, ensuring that the fibers are ultimately parallel to the flow direction. After pouring and waiting for the concrete to harden, the mold 6 can be removed to obtain the fiber-oriented reinforced drainage ditch cover, which can reduce its structural thickness and significantly improve its strength.

[0029] Furthermore, concrete, due to its high strength, high durability, and low price, is widely used in drainage ditch covers in municipal, bridge, and transportation engineering projects. However, the reinforcing effect of concrete mainly relies on the chopped steel fibers or high-performance synthetic fibers added internally. Under conventional pouring conditions, these fibers are usually randomly distributed, making it difficult for them to exert their reinforcing effect in directional load-bearing components, thus affecting the load-bearing efficiency and economy of the cover. Drainage covers typically bear bending moments along their length, making them typical directional load-bearing components. This device controls the movement of the hopper 1 on the longitudinal guide rail 5, causing the concrete to flow along the length direction (i.e., the main bending direction of the cover) in the mold 6. The flowing concrete mixture drags and orients the fibers, causing them to be mainly distributed along the bending direction of the cover, thereby significantly enhancing its crack resistance and load-bearing capacity. The hopper 1 is supported by multiple longitudinal sliders 51 connected to the longitudinal guide rail 5, and is connected to the transverse guide rail 4 by transverse sliders 41 at both ends of the longitudinal guide rail 5 to achieve two-dimensional sliding control. During operation, the hopper 1 can start from the left front corner of the mold 6 and pour longitudinally from front to back. After each longitudinal pour is completed, the transverse guide rail 4 drives the transverse sliders 41 to move the hopper 1 laterally by a certain distance, and then pour longitudinally again. This repeated operation makes the concrete form multiple flow paths with the same direction inside the mold 6, which is conducive to the continuous directional arrangement of fibers. The hopper 1 structure includes a top inlet 11, a square discharge section 12, and a narrowing arc-shaped discharge section 13, with the end connected to the outlet 2. The discharge section 12 has a transverse guide structure with an arc surface, making its overall cross-section "L" shaped, with its top surface being an arc structure connected to a square cylindrical structure. The two side walls of the discharge section 13 are concave arc-shaped, forming a velocity gradient with a high flow velocity at the center and a slow flow velocity at the edges. This structure, when placed at an angle, causes the concrete to flow faster at the center as it gravity-flows from a higher position to the outlet 2, and the fibers deflect and align along this direction, enhancing the fiber orientation effect. Compared with the traditional random fiber distribution, this device controls the fiber orientation arrangement, making it fully effective in the main stress direction of the cover plate; under the same structural strength, it can reduce the fiber content by about 20-30%; at the same time, it can reduce the thickness of the concrete cover plate by 5-10 mm, reduce the self-weight of the component, and improve economic efficiency.

[0030] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A casting device for manufacturing fiber-oriented concrete trench covers, characterized in that: include: The hopper (1) has an inlet (11), a discharge section (12) and a discharge section (13) for containing and guiding the flow of concrete mixture; The outlet (2) is located at the end of the discharge section (13) and is used to introduce concrete into the mold; The base plate (3) is a flat plate structure and serves as the mounting platform for the device; A transverse guide rail (4) is arranged parallel to both sides of the base plate (3); a longitudinal guide rail (5) is arranged above the device, along the front-back direction, and is higher than the transverse guide rail (4); multiple sliders, including a longitudinal slider (51) connecting the hopper (1) and the longitudinal guide rail (5), and a transverse slider (41) connecting the longitudinal guide rail (5) and the transverse guide rail (4); a mold (6) is arranged above the base plate (3) between the transverse guide rails (4) for forming the drainage ditch cover.

2. The casting device for manufacturing fiber-oriented concrete trench covers according to claim 1, characterized in that: The hopper (1) is arranged at an angle, with the inlet (11) located at the top and surrounded by flat plates that are inclined outward on all four sides, so as to facilitate feeding from above; the discharge section (12) is a square cylindrical structure with a transverse guide structure with an arc surface on one side of the bottom, so that the overall cross section of the discharge section (12) is "L" shaped, which is used to guide the directional flow of the mixture.

3. A casting device for manufacturing fiber-oriented concrete trench covers according to claim 1, characterized in that: The discharge section (13) is an arc-shaped narrow channel structure with inwardly curved arc surfaces on both sides, which makes the flow velocity of the concrete in the middle faster than that on both sides during the flow process, thereby inducing the fibers to be oriented in the flow direction.

4. A casting device for manufacturing fiber-oriented concrete trench covers according to claim 1, characterized in that: The hopper (1) is slidably connected to the longitudinal guide rail (5) via a longitudinal slider (51), and can move back and forth along the longitudinal guide rail (5).

5. A casting device for manufacturing fiber-oriented concrete trench covers according to claim 1, characterized in that: The longitudinal guide rail (5) is connected to the transverse slider (41) at both ends. The transverse slider (41) can slide left and right on the transverse guide rail (4), thereby driving the hopper (1) to move in two dimensions in the horizontal plane.

6. A casting device for manufacturing fiber-oriented concrete trench covers according to claim 1, characterized in that: The mold (6) is detachable and replaceable, and is used to form drainage ditch covers of different shapes and specifications to meet different application needs.

7. A casting device for manufacturing fiber-oriented concrete trench covers according to claim 1, characterized in that: The hopper (1) can slide along the horizontal and vertical directions on the horizontal guide rail (4) and the vertical guide rail (5) to form a controllable two-dimensional moving path, so that it can move at a constant speed above the mold (6) while continuously discharging and pouring material.

8. A casting device for manufacturing fiber-oriented concrete trench covers according to claim 1, characterized in that: The base plate (3) is provided with a limiting device for positioning the mold (6) and preventing it from moving during the pouring process.

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