An ultra-high performance concrete mixing device

Abstract

The utility model discloses a kind of ultra-high performance concrete mixing devices, it is related to concrete production equipment technical field, including fibre bin, powder bin and mixing bin, fibre bin includes outer tube and inner tube, inner tube is rotationally arranged in the inside of outer tube and the side wall of both is formed with centrifugal cavity at interval, the side wall of inner tube is provided with the through hole of penetration, through hole is connected with centrifugal cavity.Vibrating screen is equipped in powder bin;Mixing bin includes bin body and stirring part, and bin body is equipped with mixing chamber, the inlet of mixing chamber is connected with centrifugal cavity and powder bin, and stirring part is rotationally arranged in mixing chamber.Fiber material after centrifugal motion is evenly dispersed, after mixing with the powder of powder bin, after stirring by stirring part, fiber material is not prone to entanglement and agglomeration in mixing process, fiber is evenly distributed, and it does not affect the toughness and crack resistance of ultra-high performance concrete made.

Description

Technical Field

[0001] This utility model relates to the field of concrete production equipment technology, specifically to an ultra-high performance concrete mixing device. Background Technology

[0002] In the field of construction engineering, ultra-high performance concrete (UHPC) has become a representative of high-performance structural materials due to its excellent compressive strength, superior toughness, and outstanding durability. The full realization of UHPC's performance depends heavily on its various internal components, especially fine powders (such as highly active ultrafine powders like silica fume and quartz powder, as well as a large amount of cementitious materials) and chopped reinforcing fibers (such as steel fibers or synthetic fibers), which are manufactured by mixing and blending fine powders and fiber materials.

[0003] However, existing conventional concrete mixing equipment directly pours fiber materials and powder materials into the mixing bin for mixing, which makes the high-content, high aspect ratio fibers very prone to entanglement and clumping during the mixing process. The uneven distribution of fibers severely degrades the toughness and crack resistance of ultra-high performance concrete. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose an ultra-high performance concrete mixing device to solve the technical problem that conventional concrete mixing equipment directly pours fiber materials and powder materials into the mixing chamber for mixing, which leads to the easy entanglement and clumping of high-content, high aspect ratio fibers during the mixing process, resulting in uneven fiber distribution and serious deterioration of the toughness and crack resistance of ultra-high performance concrete.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: This utility model provides an ultra-high performance concrete mixing device, comprising: A fiber silo includes an outer cylinder and an inner cylinder. The inner cylinder is rotatably disposed inside the outer cylinder, and the side walls of the two are spaced apart to form a centrifugal cavity. The side wall of the inner cylinder has a through hole that connects to the centrifugal cavity. Powder silo, equipped with a vibrating screen; and A mixing chamber includes a chamber body and a stirring element. The chamber body is provided with a mixing cavity. The inlet of the mixing cavity is connected to the centrifugal chamber and the powder silo. The stirring element is rotatably disposed in the mixing cavity.

[0006] In some embodiments, the inner cylinder has a plurality of uniformly arranged through holes along its circumference, and the inner cylinder is rotatably connected to the outer cylinder by bearings.

[0007] In some embodiments, a bottom hole is provided through the bottom of the inner cylinder, and the bottom hole communicates with the mixing chamber.

[0008] In some embodiments, the stirring element includes a rotating shaft and a plurality of stirring units, wherein the plurality of stirring units are spaced apart on the rotating shaft along the length extension direction of the rotating shaft.

[0009] In some embodiments, the stirring unit includes a sliding sleeve, a locking member, and stirring blades. The sliding sleeve is slidably disposed on the rotating shaft, the locking member is movably disposed on the sliding sleeve and can drive the sliding sleeve to lock or unlock relative to the rotating shaft, and the stirring blades are disposed on the outer wall of the sliding sleeve.

[0010] In some embodiments, the rotating shaft has a plurality of spaced positioning grooves along its length extension direction, the locking member passes through the side wall of the sliding sleeve, and can be connected to or separated from any of the positioning grooves when the sliding sleeve slides.

[0011] In some embodiments, the end of the stirring blade away from the sliding sleeve is serrated.

[0012] In some embodiments, the serrated end of the stirring blade has a through-hole for air intake.

[0013] In some embodiments, the bottom of the mixing chamber has a discharge valve, and the ultra-high performance concrete mixing device further includes a funnel-shaped discharge chamber, the larger side of which is connected to the chamber body and communicates with the discharge valve.

[0014] In some embodiments, the ultra-high performance concrete mixing device further includes a funnel-shaped first feed hopper and a second feed hopper, wherein the smaller end of the first feed hopper is connected to the inlet of the fiber hopper, and the smaller end of the second feed hopper is connected to the inlet of the powder hopper.

[0015] Compared with the prior art, the ultra-high performance concrete mixing device provided by this utility model has a powder silo for placing the powder required for the concrete to be processed. The powder can be evenly spread after passing through a vibrating screen. The fiber silo is used to place the fiber required for the concrete to be processed. With the high-speed rotation of the inner cylinder, the fiber in the inner cylinder is driven to perform centrifugal motion. The fiber can enter the centrifugal chamber through the through hole and then fall into the mixing chamber. After centrifugal motion, the fiber is evenly dispersed. After mixing with the powder in the powder silo, it is stirred by the agitator. The fiber is not easy to entangle or clump during the mixing process. The fiber is evenly distributed and does not affect the toughness and crack resistance of the manufactured ultra-high performance concrete. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the ultra-high performance concrete mixing device provided in this embodiment of the utility model; Figure 2 This is a schematic diagram of the fiber bin structure provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the stirring component provided in an embodiment of this utility model. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] To address the technical problem in existing conventional concrete mixing equipment where fiber materials and powder are directly poured into the mixing chamber for mixing, resulting in high-content, high aspect ratio fibers easily becoming entangled and clumped during the mixing process, leading to uneven fiber distribution and severely deteriorating the toughness and crack resistance of ultra-high performance concrete, this invention provides an ultra-high performance concrete mixing device. This device can fully disperse the fiber materials using centrifugation before mixing them with the powder, greatly improving the toughness and crack resistance of ultra-high performance concrete.

[0019] It should be noted that the ultra-high performance concrete mixing device described in this utility model is used for, but not limited to, concrete manufacturing. For ease of explanation, this utility model only uses the application of the ultra-high performance concrete mixing device in concrete manufacturing as an example. The principle of the ultra-high performance concrete mixing device in other types of equipment is essentially the same as that in concrete manufacturing, and will not be described in detail here.

[0020] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of an ultra-high performance concrete mixing device according to an embodiment of the present invention. The ultra-high performance concrete mixing device includes a fiber bin 1, a powder bin 2, and a mixing bin 3. The fiber bin 1 includes an outer cylinder 11 and an inner cylinder 12. The inner cylinder 12 is rotatably disposed inside the outer cylinder 11, and a centrifugal chamber 13 is formed between the side walls of the outer cylinder 11 and the inner cylinder 12. A through hole 121 is provided on the side wall of the inner cylinder 12, which connects to the centrifugal chamber 13. The inner cylinder 12 is rotatably connected to the outer cylinder 11 by a bearing 14 to achieve stable rotation of the inner cylinder 12. A bottom hole 122 is provided at the bottom of the inner cylinder 12, which connects to the mixing chamber 31 inside the mixing bin 3.

[0021] The powder silo 2 is equipped with a vibrating screen 21, which is used to vibrate the powder so that the powder enters the mixing chamber 31 evenly and avoids large particles of powder entering the mixing chamber 31 and affecting the mixing effect.

[0022] The mixing chamber 3 includes a chamber body 32 and a stirring element 33. The chamber body 32 is provided with a mixing cavity 31, and the inlet of the mixing cavity 31 is connected to the centrifuge chamber 13 and the powder silo 2. The stirring element 33 is rotatably disposed in the mixing cavity 31. The stirring element 33 includes a rotating shaft 331 and multiple stirring units 332. The multiple stirring units 332 are spaced apart on the rotating shaft 331 along the length of the rotating shaft 331.

[0023] In this embodiment, the inner cylinder 12 is driven to rotate at high speed, and the inner cylinder 12 drives the fiber material to perform centrifugal motion. Under the action of centrifugal force, the fiber material enters the centrifugal chamber 13 through the through hole 121, further dispersing the fiber material and avoiding entanglement and clumping. The fiber material is evenly distributed, which significantly improves the toughness and crack resistance of the concrete.

[0024] The inner cylinder 12 has through holes 121 with a diameter of 3mm-5mm evenly distributed around its perimeter. When the inner cylinder 12 rotates at high speed, the fiber material is subjected to centrifugal force and passes through the through holes 121 evenly and enters the centrifugal chamber 13.

[0025] The bottom of the inner cylinder 12 has a bottom hole 122 with a diameter of 20mm-40mm. Residual fiber material that is not thrown out by the centrifugal force of the inner cylinder 12 directly enters the mixing chamber 31 through the bottom hole 122, avoiding the accumulation of fiber material in the inner cylinder 12. Multiple bottom holes 122 are provided and are evenly distributed at the bottom of the inner cylinder 12, which can accelerate the falling of accumulated fiber material into the mixing chamber 31.

[0026] In one embodiment, please refer to Figure 1 The mixing component 33 includes a rotating shaft 331 and multiple mixing units 332, which are spaced apart along the length of the rotating shaft 331. In this embodiment, one end of the rotating shaft 331 is connected to a drive motor (not shown in the figure). Driven by the drive motor, the rotating shaft 331 can rotate at high speed, thereby driving the multiple mixing units 332 to rotate, so that the multiple mixing units 332 can mix the fiber material and powder material. The multiple mixing units 332 can improve the mixing efficiency of the mixture.

[0027] In one embodiment, please refer to Figure 1 and Figure 3The mixing unit 332 includes a sliding sleeve 333, a locking member 334, and a mixing blade 335. The sliding sleeve 333 is slidably disposed on the rotating shaft 331. The locking member 334 is movably disposed on the sliding sleeve 333 and can drive the sliding sleeve 333 to lock or unlock relative to the rotating shaft 331. The mixing blade 335 is disposed on the outer wall of the sliding sleeve 333. In this embodiment, the sliding sleeve 333 can slide up and down along the rotating shaft 331 to adjust the position of the mixing blade 335 so that the mixing blade 335 can effectively mix the mixture. For example, if the amount of mixture is small, the sliding sleeve 333 can be slid towards the mixture to ensure that the mixing blade 335 is in full contact with the mixture, thereby improving the mixing efficiency. When the sliding sleeve 333 needs to be adjusted, it can be unlocked first, slid to the target position, and then locked again.

[0028] Furthermore, there are many ways to lock the slide sleeve 333; please refer to [link / reference]. Figure 2 In this embodiment, the rotating shaft 331 has multiple spaced positioning grooves 336 along its length. The locking member 334 passes through the side wall of the sliding sleeve 333 and can connect or separate from any positioning groove 336 when the sliding sleeve 333 slides. In this embodiment, the locking member 334 is a spring plunger. The locking member 334 engages with the positioning groove 336 through elastic force, thereby locking the sliding sleeve 333 and the rotating shaft 331. When it is necessary to unlock the sliding sleeve 333, the locking member 334 can be pulled out of the positioning groove 336, and then the sliding sleeve 333 can be slid to a new positioning groove 336, and the locking member 334 can be engaged with the new positioning groove 336.

[0029] In one embodiment, please refer to Figure 3 The end of the stirring blade 335 furthest from the sliding sleeve 333 is serrated. During rotation, the sharp serrated edges of the serrated stirring blade 335 can generate a strong shearing effect on the fiber material and powder material. This shearing effect can effectively break the entanglement between the fiber materials and prevent the fiber materials from forming clumps during the stirring process, thereby improving the dispersion uniformity of the fiber materials.

[0030] In one embodiment, please refer to Figure 3 The serrated end of the stirring blade 335 has a through-hole vent 337. The vent 337 generates a small airflow during stirring, which further disperses the fiber material and prevents it from agglomerating. Additionally, the vent 337 reduces air resistance during stirring. When the stirring blade 335 rotates, air can flow through the vent 337, thereby reducing stirring resistance.

[0031] In one embodiment, please refer to Figure 1The mixing chamber 3 has a discharge valve 34 at its bottom. The ultra-high performance concrete mixing device also includes a funnel-shaped discharge hopper 4. The larger side of the discharge hopper 4 is connected to the chamber body 32 of the mixing chamber 3 and is connected to the discharge valve 34. The discharge valve 34 is installed at the bottom of the mixing chamber 3 and can precisely control the discharge of concrete. The structure of the discharge valve 34 is an existing design, and its specific structure will not be described in detail. The funnel-shaped discharge hopper 4 design allows the concrete to flow naturally to the discharge port under gravity, reducing the residue and accumulation of the mixture.

[0032] In one embodiment, please refer to Figure 1 The ultra-high performance concrete mixing plant also includes a funnel-shaped first feed hopper and a second feed hopper. The smaller end of the first feed hopper connects to the inlet of the fiber silo, and the smaller end of the second feed hopper connects to the inlet of the powder silo. The first feed hopper 5 is used for feeding fiber materials. Its funnel-shaped structure guides the fiber materials to the inlet of the fiber silo 1, reducing the scattering and accumulation of fiber materials during the feeding process. The second feed hopper 6 is used for feeding powder materials. Its funnel-shaped structure guides the powder materials to the inlet of the powder silo 2, reducing the scattering and accumulation of powder materials during the feeding process. During operation, fiber materials are added to the fiber silo 1 through the first feed hopper 5, and powder materials are added to the powder silo 2 through the second feed hopper 6. The funnel-shaped feed hopper design ensures that materials can enter the mixing chamber 3 quickly and evenly, improving the mixing effect and the quality of the concrete.

[0033] To better understand this utility model, the following is combined with... Figures 1 to 3 The technical solution of this utility model is described in detail below: When using the ultra-high performance concrete mixing device of this invention, the fiber material is first added to the inner cylinder 12 of the fiber silo 1 through the first feed silo 5. The inner cylinder 12 rotates at high speed driven by a motor (not shown in the figure), causing the fiber material in the inner cylinder 12 to undergo centrifugal motion. Under the action of centrifugal force, the fiber material enters the centrifugal chamber 13 through the through-hole 121 on the side wall of the inner cylinder 12, and finally enters the mixing chamber 31 of the mixing silo 3 through the bottom hole 122 at the bottom of the inner cylinder 12. Simultaneously, the powder material is added to the powder silo 2 through the second feed silo 6, and after being screened by the vibrating screen 21, it enters the mixing chamber 31 evenly. Inside the mixing chamber 31, the fiber material and powder material are fully mixed under the action of the agitator 33. The rotating shaft 331 of the agitator 33 rotates under the drive of a motor (not shown in the figure), driving the agitator blades 335 to agitate the mixture. The serrated ends and air guide holes of the agitator blades 335 help to further improve the mixing effect, making the fiber material and powder material mix more evenly and preventing the fiber material from tangling and clumping. After mixing, the concrete is discharged through discharge valve 34 and output through discharge hopper 4.

[0034] The ultra-high performance concrete mixing device provided by this utility model effectively solves the problems of easy fiber entanglement and clumping and uneven distribution of fiber materials and powder materials during the mixing process in the prior art through the centrifugal dispersion function of fiber bin 1, the screening function of vibrating screen 21 of powder bin 2, and the mixing design of mixing bin 3, and significantly improves the toughness and crack resistance of ultra-high performance concrete.

[0035] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A high-performance concrete mixing device, characterized in that, include: A fiber silo includes an outer cylinder and an inner cylinder, wherein the inner cylinder is rotatably disposed inside the outer cylinder and the two are spaced apart to form a centrifugal cavity, and a through hole is provided on the side wall of the inner cylinder, the through hole communicating with the centrifugal cavity; Powder silo, equipped with a vibrating screen; and A mixing chamber includes a chamber body and a stirring element. The chamber body is provided with a mixing cavity. The inlet of the mixing cavity is connected to the centrifugal chamber and the powder silo. The stirring element is rotatably disposed in the mixing cavity.

2. The ultra-high performance concrete mixing device according to claim 1, characterized in that, The inner cylinder has a plurality of evenly arranged through holes along its circumference, and the inner cylinder is rotatably connected to the outer cylinder by bearings.

3. The ultra-high performance concrete mixing device according to claim 1, characterized in that, The bottom of the inner cylinder has a through hole that connects to the mixing chamber.

4. The ultra-high performance concrete mixing device according to claim 1, characterized in that, The stirring component includes a rotating shaft and multiple stirring units, which are spaced apart on the rotating shaft along its length.

5. The ultra-high performance concrete mixing device according to claim 4, characterized in that, The stirring unit includes a sliding sleeve, a locking member, and stirring blades. The sliding sleeve is slidably disposed on the rotating shaft, the locking member is movably disposed on the sliding sleeve and can drive the sliding sleeve to lock or unlock relative to the rotating shaft, and the stirring blades are disposed on the outer wall of the sliding sleeve.

6. The ultra-high performance concrete mixing device according to claim 5, characterized in that, The rotating shaft has multiple spaced positioning grooves along its length. The locking member passes through the side wall of the sliding sleeve and can connect or separate from any of the positioning grooves when the sliding sleeve slides.

7. The ultra-high performance concrete mixing device according to claim 5, characterized in that, The end of the stirring blade furthest from the sliding sleeve is serrated.

8. The ultra-high performance concrete mixing device according to claim 7, characterized in that, The serrated end of the stirring blade has a through-hole for air intake.

9. The ultra-high performance concrete mixing device according to claim 1, characterized in that, The bottom of the mixing chamber has a discharge valve, and the ultra-high performance concrete mixing device also includes a funnel-shaped discharge chamber. The side of the discharge chamber with the larger area is connected to the chamber body and communicates with the discharge valve.

10. The ultra-high performance concrete mixing device according to claim 1, characterized in that, The ultra-high performance concrete mixing device also includes a funnel-shaped first feed hopper and a second feed hopper. The smaller end of the first feed hopper is connected to the inlet of the fiber hopper, and the smaller end of the second feed hopper is connected to the inlet of the powder hopper.

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