Low-temperature early-strength concrete mixing and molding equipment

Abstract

The utility model provides a kind of low temperature early strength concrete mixing and forming equipment, belong to concrete production technical field, the equipment includes rack, and stirring box and stirring structure are arranged on rack, and stirring structure includes stirring paddle and first driving device, and stirring paddle is arranged in stirring box, and first driving device is arranged on rack for driving stirring paddle rotation, and the bottom of rack is provided with universal wheel. The bottom of stirring box is provided with discharge gate, and the periphery of discharge gate is provided with fence;The bottom of stirring box is also provided with second driving device, and the output end of second driving device is provided with vibrator, and second driving device drives vibrator to lift. The equipment can improve the efficiency of low temperature early strength concrete block, reduce labor cost, and improve the quality of concrete block.

Description

Technical Field

[0001] This utility model relates to the field of concrete production technology, and in particular to a low-temperature early-strength concrete mixing and molding equipment. Background Technology

[0002] Low-temperature early-strength concrete is a special type of concrete adapted to low-temperature environments (usually below 5℃ or 0℃-10℃). Its core characteristic is rapid setting and hardening under low-temperature conditions, significantly improving early strength while ensuring that later strength and durability meet design requirements. It is mainly used to solve the problems of slow strength growth and susceptibility to frost damage in concrete during low-temperature construction. Low-temperature early-strength concrete is often made into blocks. Due to its characteristics of "rapid hardening at low temperatures, high early strength, and good frost resistance," low-temperature early-strength concrete blocks have irreplaceable advantages in scenarios requiring rapid molding, low-temperature construction, and emergency repairs. They are widely used in small load-bearing components such as lintels, window sills, stair treads, wall infill blocks, partition blocks, and road repair blocks. The manufacturing process of low-temperature early-strength concrete blocks requires first mixing the concrete raw materials evenly, and then placing the mixed materials into molds for shaping. The existing low-temperature early-strength concrete block molding process is mostly done manually. This molding method is not only inefficient, but also prone to uneven mixing and long molding time, resulting in substandard quality of the molded blocks and affecting subsequent use.

[0003] Therefore, it is necessary to improve the existing process of producing soil blocks from low-temperature early-strength concrete in order to overcome the shortcomings of the existing technology. Utility Model Content

[0004] To overcome the problems existing in related technologies, one of the objectives of this utility model is to provide a low-temperature early-strength concrete mixing and molding equipment, which can improve the efficiency of low-temperature early-strength concrete into blocks, reduce labor costs, and improve the quality of concrete blocks.

[0005] A low-temperature early-strength concrete mixing and molding equipment includes:

[0006] A frame is provided, on which a mixing tank and a mixing structure are provided. The mixing structure includes a mixing paddle and a first driving device. The mixing paddle is disposed in the mixing tank. The first driving device is disposed on the frame for driving the mixing paddle to rotate. The bottom of the frame is provided with casters.

[0007] The bottom of the mixing tank is provided with a discharge port, and the discharge port is surrounded by a barrier; the bottom of the mixing tank is also provided with a second driving device, and the output end of the second driving device is provided with a vibrator, which is driven by the second driving device to move up and down.

[0008] In a preferred embodiment of this invention, a heating chamber is provided on the outer wall of the mixing tank, and a heating element is provided in the heating chamber. The heating element is arranged in a ring on the outer wall of the mixing tank.

[0009] In a preferred embodiment of this invention, a blower is provided around the heating chamber, and the outlet of the blower is connected to the heating chamber.

[0010] In a preferred embodiment of this invention, the bottom of the heating chamber is connected to the space enclosed by the enclosure through an air vent, and an electromagnetic valve is provided at the air vent.

[0011] In a preferred embodiment of this utility model, the vibrator includes a connecting plate, a mounting plate, and a vibrating body. The connecting plate is disposed at the output end of the second driving device, and the mounting plate is disposed on one side of the connecting plate. The mounting plate and the connecting plate are connected to each other by an adjusting screw.

[0012] The vibrating body is mounted on the mounting plate.

[0013] In a preferred embodiment of this utility model, the vibrating body includes a cylinder, which is fixed to one side of the mounting plate. A motor, an eccentric rotor, and a connecting shaft are disposed in the cylinder. The motor is fixed in the cylinder, the eccentric rotor is disposed at the output end of the motor, and one end of the connecting shaft is fixedly connected to the eccentric rotor.

[0014] A vibrating head is provided at one end of the connecting shaft away from the eccentric rotor, and the vibrating head is exposed outside the cylinder body.

[0015] In a preferred embodiment of this invention, the bottom of the vibrating head is conical, and the outer wall of the vibrating head is provided with a plurality of vibrating nails, which are connected to the vibrating head by springs.

[0016] In a preferred embodiment of this invention, the stirring paddle includes a stirring rod and twin propeller blades. The twin propeller blades are arranged on the stirring rod along its length, and one end of the stirring rod is connected to the output end of the first driving device.

[0017] The beneficial effects of this utility model are as follows:

[0018] This utility model provides a low-temperature early-strength concrete mixing and molding equipment. The equipment includes a frame, on which a mixing tank and a mixing structure are mounted. The mixing structure includes a mixing paddle and a first drive device. The mixing paddle is disposed in the mixing tank, and the first drive device is mounted on the frame to drive the mixing paddle to rotate. Casters are provided at the bottom of the frame. A discharge port is provided at the bottom of the mixing tank, and a barrier is provided around the discharge port. A second drive device is also provided at the bottom of the mixing tank, and a vibrator is installed at the output end of the second drive device, which drives the vibrator to move up and down. During operation, preheated aggregate, cement, low-temperature early-strength admixture, and heated mixing water are added to the mixing tank through the feed inlet. The first drive device is then started, and the mixing paddle rotates for 4-6 minutes until the concrete mixture is homogeneous. Then, the concrete mold (placed inside the enclosure) is positioned, the discharge port is opened, and the concrete mixture flows into the mold through the enclosure. Simultaneously, the second drive device is activated, driving the vibrator to descend and insert into the concrete inside the mold. High-frequency vibration is performed for the set time until the surface is smooth and free of air bubbles. After vibration is complete, the vibrator rises back to its original position, the discharge port is closed, and the mold is replaced to repeat the operation. This equipment integrates mixing and molding functions, significantly shortening the time between concrete mixing and vibration molding, effectively improving efficiency. Furthermore, the vibrator and discharge port work together to ensure rapid and thorough vibration after the concrete enters the mold, reducing fluidity loss due to prolonged placement at low temperatures, thereby improving the molding quality of the concrete blocks. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the low-temperature early-strength concrete mixing and molding equipment provided by this utility model;

[0020] Figure 2 This is a side view of the low-temperature early-strength concrete mixing and molding equipment provided by this utility model;

[0021] Figure 3 This is a schematic diagram of the heating chamber provided by this utility model being installed outside the mixing tank;

[0022] Figure 4 This is a schematic diagram of the stirring paddle provided by this utility model;

[0023] Figure 5 This is a schematic diagram of the vibrator provided by this utility model installed on the second drive device.

[0024] Figure label:

[0025] 1. Frame; 11. Casters; 2. Mixing tank; 21. Enclosure; 22. Heating chamber; 23. Air vent; 24. Second drive unit; 3. Mixing structure; 31. Mixing paddle; 32. First drive unit; 4. Heating element; 5. Vibrator; 51. Connecting plate; 52. Mounting plate; 53. Vibrator body; 531. Cylinder; 532. Motor; 533. Eccentric rotor; 534. Vibrating head; 5341. Vibrating nail; 535. Connecting shaft. Detailed Implementation

[0026] Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0027] Low-temperature early-strength concrete (LTC) is often made into blocks. LTC blocks, with their characteristics of rapid hardening at low temperatures, high early strength, and good frost resistance, have irreplaceable advantages in scenarios requiring rapid molding, low-temperature construction, and emergency repairs. They are widely used in small load-bearing components such as lintels, window sills, and stair treads, as well as wall infill blocks, partition blocks, and road repair blocks. The manufacturing process of LTC blocks requires first thoroughly mixing the concrete raw materials, then placing the mixed materials into molds. However, the current molding process for LTC blocks is mostly manual. This method is not only inefficient but also prone to uneven mixing and prolonged molding time, resulting in substandard quality blocks that affect subsequent use.

[0028] Based on this, this application provides a low-temperature early-strength concrete mixing and molding device.

[0029] Example

[0030] like Figures 1-5 As shown in the figure, this embodiment provides a low-temperature early-strength concrete mixing and molding equipment, comprising:

[0031] A frame 1 is provided with a mixing tank 2 and a mixing structure 3. The mixing structure 3 includes a mixing paddle 31 and a first driving device 32. The mixing paddle 31 is disposed in the mixing tank 2. The first driving device 32 is disposed on the frame 1 for driving the mixing paddle 31 to rotate. A caster wheel 11 is provided at the bottom of the frame 1.

[0032] The bottom of the mixing tank 2 is provided with a discharge port, and a baffle 21 is provided around the discharge port; the bottom of the mixing tank 2 is also provided with a second driving device 24, and a vibrator 5 is provided at the output end of the second driving device 24, and the second driving device 24 drives the vibrator 5 to rise and fall.

[0033] Specifically, in one embodiment, the enclosure 21 is a circular or rectangular steel plate, welded to the bottom of the mixing tank 2 and surrounding the discharge port, with an inner diameter adapted to the standard mold size to prevent concrete from splashing when discharged.

[0034] The second drive device 24 is an electric push rod, which is vertically fixed on the bracket on the side of the frame 1, with the output end facing downward and connected to the vibrator 5. The vibrator 5 adopts an insert-type high-frequency vibrator (vibration frequency 200Hz, power 1.1kW), and the vertical distance between the head of the vibrator and the center of the discharge port is 150mm (to ensure that the vibration area covers the center of the mold).

[0035] The aforementioned low-temperature early-strength concrete mixing and molding equipment includes a frame 1, on which a mixing tank 2 and a mixing structure 3 are mounted. The mixing structure 3 includes a mixing paddle 31 and a first drive device 32. The mixing paddle 31 is disposed in the mixing tank 2, and the first drive device 32 is mounted on the frame 1 to drive the mixing paddle 31 to rotate. Universal wheels 11 are provided at the bottom of the frame 1. A discharge port is provided at the bottom of the mixing tank 2, and a barrier 21 is provided around the discharge port. A second drive device 24 is also provided at the bottom of the mixing tank 2, and a vibrator 5 is provided at the output end of the second drive device 24, which drives the vibrator 5 to rise and fall. During operation, preheated aggregate, cement, low-temperature early-strength admixture, and heated mixing water are added to the mixing tank 2 through the feed inlet. The first drive device 32 is then started, and the mixing paddle 31 rotates for 4-6 minutes until the concrete mixture is homogeneous. Then, the concrete mold (placed inside the enclosure 21) is positioned, the discharge port is opened, and the concrete mixture flows into the mold through the enclosure 21. Simultaneously, the second drive device 24 is activated, driving the vibrator 5 to descend and insert into the concrete inside the mold. High-frequency vibration is performed for a set time until the surface is smooth and free of air bubbles. After vibration is complete, the vibrator 5 rises back to its original position, the discharge port is closed, and the mold is replaced to repeat the operation. This equipment integrates mixing and molding functions, significantly shortening the time between concrete mixing and vibration molding, effectively improving efficiency. Furthermore, the vibrator 5 and the discharge port work together to ensure rapid and thorough vibration of the concrete after it enters the mold, reducing fluidity loss due to prolonged placement at low temperatures, thereby improving the molding quality of the concrete blocks.

[0036] Furthermore, the outer wall of the mixing tank 2 is provided with a heating chamber 22, and a heating element 4 is provided in the heating chamber 22. The heating element 4 is arranged in a ring on the outer wall of the mixing tank 2.

[0037] Furthermore, a blower is provided around the heating chamber 22, and the outlet of the blower is connected to the heating chamber 22.

[0038] The heating element 4 is arranged in a ring within the heating chamber 22, providing 360° heating to the outer wall of the mixing tank 2 without dead angles, thus avoiding the uneven heating problem caused by traditional localized heating. The heating element 4 actively replenishes heat to offset heat loss from the mixing tank 2, keeping the temperature deviation of the concrete mixture within ±2℃ (traditional insulation can only control it within ±5℃), ensuring uniform cement hydration and preventing insufficient activity of the early-strength agent due to excessively low local temperatures. The blower introduces airflow into the heating chamber 22, breaking down the static thermal resistance inside the chamber and allowing the heat generated by the heating element 4 to quickly diffuse throughout the entire heating chamber 22 through air circulation, improving heat transfer efficiency. The flowing airflow also guides excess heat on the inner wall of the heating chamber 22 (such as the high-temperature area near the heating element 4) to the low-temperature area, reducing energy waste caused by localized overheating.

[0039] Furthermore, the bottom of the heating chamber 22 is connected to the space enclosed by the enclosure 21 through the air vent 23, and an electromagnetic valve is provided at the air vent 23.

[0040] The enclosure 21 and the ventilation opening 23 work together to form a relatively enclosed space. The hot air can preheat the mold and maintain the temperature around the mold at 5-15℃ (in an environment of -20℃), preventing the surface temperature of the freshly poured concrete from dropping sharply due to exposure to low-temperature air. This temperature barrier ensures that the surface temperature of the concrete is ≥5℃ before initial setting (approximately 2-4 hours at low temperatures), meeting the requirement of "early curing temperature of concrete not lower than 5℃" in the "Code for Winter Construction of Building Engineering", thus reducing the risk of surface freezing cracking from the source.

[0041] Furthermore, the vibrator 5 includes a connecting plate 51, a mounting plate 52, and a vibrating body 53. The connecting plate 51 is disposed at the output end of the second driving device 24, and the mounting plate 52 is disposed on one side of the connecting plate 51. The mounting plate 52 and the connecting plate 51 are connected to each other by an adjusting screw.

[0042] The vibrating body 53 is mounted on the mounting plate 52.

[0043] Furthermore, the vibrating body 53 includes a cylinder 531, which is fixed to one side of the mounting plate 52. The cylinder 531 is provided with a motor 532, an eccentric rotor 533, and a connecting shaft 535. The motor 532 is fixed in the cylinder 531, the eccentric rotor 533 is disposed at the output end of the motor 532, and one end of the connecting shaft 535 is fixedly connected to the eccentric rotor 533.

[0044] A vibrating head 534 is provided at one end of the connecting shaft 535 away from the eccentric rotor 533, and the vibrating head 534 is exposed outside the cylinder 531.

[0045] During operation, the motor 532 directly drives the eccentric rotor 533 (without intermediate gears or belt drive), and in conjunction with the rigid connecting shaft 535, effectively improves the efficiency of vibration energy transmission. In scenarios with high viscosity concrete at low temperatures, it ensures that the vibration head 534 outputs stable amplitude (≥1.5mm) when it outputs 200Hz high-frequency vibration, effectively breaking up air bubbles inside the concrete and improving the density of the concrete block.

[0046] Furthermore, the bottom of the vibrating head 534 is conical, and the outer wall of the vibrating head 534 is provided with a plurality of vibrating nails 5341, which are connected to the vibrating head 534 by springs.

[0047] The vibratory nail 5341 is connected to the vibratory head 534 via a spring. Based on the high-frequency vibration of the main vibrator 53, the elastic deformation of the spring causes the vibratory nail 5341 to generate "secondary high-frequency micro-vibration," forming a composite disturbance of "main vibration + local micro-vibration." This multi-dimensional vibration can effectively break the stable state of "viscous paste encapsulating air bubbles" in low-temperature concrete, improving the efficiency of air bubble escape. The spring-loaded vibratory nail 5341 converts the impact force into flexible vibration through elastic buffering, ensuring compaction while reducing disturbance to the concrete skeleton and reducing the surface flatness error of the concrete.

[0048] Furthermore, the stirring paddle 31 includes a stirring rod and a double helical blade, the double helical blade being disposed on the stirring rod along the length direction of the stirring rod, and one end of the stirring rod being connected to the output end of the first driving device 32.

[0049] The double-helix blades arranged along the length of the mixing rod (preferably with opposite helical directions in the upper and lower layers) create a composite flow field of "upward pushing + downward squeezing" during rotation. The upper blades lift the material at the bottom to the top of the mixing tank 2, while the lower blades press the material at the top to the bottom, allowing the aggregate, cement, accelerator, and heated mixing water to fully convect and mix in three-dimensional space. In low-temperature environments (where concrete viscosity is high), this effectively avoids the "bottom settling and top floating slurry" phenomenon caused by traditional single-blade mixing, improving the homogeneity of the mixture.

[0050] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0051] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0052] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A low temperature early strength concrete mixing and forming apparatus, characterized by, include: A frame is provided, on which a mixing tank and a mixing structure are provided. The mixing structure includes a mixing paddle and a first driving device. The mixing paddle is disposed in the mixing tank. The first driving device is disposed on the frame for driving the mixing paddle to rotate. The bottom of the frame is provided with casters. The bottom of the mixing tank is provided with a discharge port, and the discharge port is surrounded by a barrier; the bottom of the mixing tank is also provided with a second driving device, and the output end of the second driving device is provided with a vibrator, which is driven by the second driving device to move up and down.

2. The low-temperature early-strength concrete mixing and molding equipment according to claim 1, characterized in that: The outer wall of the mixing tank is provided with a heating chamber, and a heating element is provided in the heating chamber. The heating element is arranged in a ring on the outer wall of the mixing tank.

3. The low-temperature early-strength concrete mixing and molding equipment according to claim 2, characterized in that: A blower is provided around the heating chamber, and the outlet of the blower is connected to the heating chamber.

4. The low-temperature early-strength concrete mixing and molding equipment according to claim 3, characterized in that: The bottom of the heating chamber is connected to the space enclosed by the enclosure through an air vent, and an electromagnetic valve is installed at the air vent.

5. The low-temperature early-strength concrete mixing and molding equipment according to any one of claims 1-4, characterized in that: The vibrator includes a connecting plate, a mounting plate, and a vibrating body. The connecting plate is located at the output end of the second driving device, and the mounting plate is located on one side of the connecting plate. The mounting plate and the connecting plate are connected to each other by an adjusting screw. The vibrating body is mounted on the mounting plate.

6. The low-temperature early-strength concrete mixing and molding equipment according to claim 5, characterized in that: The vibrating body includes a cylinder, which is fixed to one side of the mounting plate. A motor, an eccentric rotor, and a connecting shaft are installed in the cylinder. The motor is fixed in the cylinder, the eccentric rotor is installed at the output end of the motor, and one end of the connecting shaft is fixedly connected to the eccentric rotor. A vibrating head is provided at one end of the connecting shaft away from the eccentric rotor, and the vibrating head is exposed outside the cylinder body.

7. The low-temperature early-strength concrete mixing and molding equipment according to claim 6, characterized in that: The bottom of the vibrating head is conical, and the outer wall of the vibrating head is provided with a plurality of vibrating nails, which are connected to the vibrating head by springs.

8. The low-temperature early-strength concrete mixing and molding equipment according to claim 7, characterized in that: The stirring paddle includes a stirring rod and twin propeller blades. The twin propeller blades are arranged on the stirring rod along its length. One end of the stirring rod is connected to the output end of the first driving device.

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