Super-retarding concrete stirring device

Abstract

The utility model relates to a super-retarding concrete stirring device which comprises a stirring barrel, a motor, a controller and a base, a detachable rubber top cover is arranged at a feeding opening in the top of the stirring barrel, a stirring device with large and small inner diameter spiral blades arranged in a staggered mode is arranged in the barrel, a motor drives the stirring blades to rotate at a low speed through a transmission shaft, and a controller can adjust the stirring speed. According to the device, by optimizing the blade combination mode and the sealing structure design, efficient and uniform stirring is achieved under the low-speed condition, bleeding and water loss of super-retarding concrete are effectively inhibited, the concrete performance is guaranteed, and the device is compact, efficient and convenient to apply and popularize. According to the utility model, the transportation and construction time of the super-retarded concrete can be prolonged, the technical advantages of the super-retarded concrete can be better exerted, and the application prospect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete, in particular to a super slow-setting concrete stirring device. Background Art

[0002] Concrete is one of the most commonly used materials in modern construction. In recent years, with the continuous expansion of the scale of construction projects, the requirements for concrete performance have become increasingly higher. Super slow-setting concrete has been widely used in large-volume concrete construction, pumping construction, etc. due to its unique performance advantages.

[0003] Super-slow setting concrete refers to concrete with a setting time of more than 72 hours, a small slump loss over time, and a strength development that meets construction and structural requirements. Compared with ordinary concrete, super-slow setting concrete has the following characteristics: (1) Long setting time, usually more than 3 days, during which the concrete can remain uniform, easy to pump and vibrate; (2) Good fluidity, small slump loss during transportation and pouring, which can greatly extend the transportation time and pouring time of concrete; (3) Low hydration heat, which can effectively control the temperature difference between the inside and outside of the concrete and avoid the occurrence of temperature cracks; (4) Small shrinkage, slow early strength development, which can reduce the risk of shrinkage cracks.

[0004] However, there are also some problems with super-slow setting concrete during the construction process. The most prominent of these is that due to its extremely long setting time, water seepage and segregation are very likely to occur during the mixing and transportation process, resulting in a decrease in the performance of the concrete. Especially during the mixing stage, since super-slow setting concrete requires a long period of mixing, a higher mixing speed is usually required to ensure the uniformity of the mixture, which aggravates the bleeding of concrete and the loss of water consumption. On the other hand, most of the commonly used concrete mixing equipment is designed for ordinary concrete and cannot fully meet the process requirements of super-slow setting concrete. For example, the mixing blades of these devices are mostly simple propeller-type, with low mixing efficiency, and are prone to produce bubbles, which aggravates the bleeding of concrete. Furthermore, the existing mixing devices have poor sealing performance, and it is very easy for the concrete to come into contact with the outside air during the mixing process, resulting in increased water evaporation.

[0005] In order to solve the above problems, the method of reducing the stirring speed is usually adopted in engineering practice to reduce water seepage, but this will lead to a significant extension of the stirring time, affecting the construction efficiency. Some literature proposes the use of vacuum stirring technology to stir in a vacuum environment to reduce the generation of bubbles, but this requires a complex vacuum device and has high construction costs. Some researchers have also designed a closed stirring device that uses a special shaft seal structure to improve the sealing performance, but its structure is complex and inconvenient to maintain.

[0006] Therefore, how to reduce bleeding and water evaporation while ensuring that the ultra-slow setting concrete is fully mixed is a technical problem that needs to be solved. In response to this problem, the utility model provides a mixing device specifically for ultra-slow setting concrete, which achieves high-quality and uniform mixing under low-speed mixing conditions by optimizing the combination of mixing blades, carefully designing the sealing structure, and flexibly controlling the mixing parameters, effectively inhibiting bleeding and water loss, and ensuring the performance of ultra-slow setting concrete, and has good application prospects. Utility Model Content

[0007] In order to solve the problems of the prior art, the embodiment of the utility model provides a super slow setting concrete mixing device. The technical solution is as follows:

[0008] On the one hand, a super slow-setting concrete mixing device is provided, including a mixing barrel, a motor, a controller, and a base. A feeding port is provided on the top of the mixing barrel, and a rubber top cover is provided above the feeding port, and the rubber top cover is detachably connected to a fixed block of the feeding port by screws; a transmission shaft connected to the motor is provided on the left side of the mixing barrel, and large inner diameter spiral blades and small inner diameter spiral blades are distributed axially on the transmission shaft, and the large inner diameter blades are connected to the transmission shaft through a fixing rod; a unloading handle for discharging is provided on the right side of the mixing barrel; the controller adjusts the rotation speed of the motor; the base includes a load-bearing platform, rollers and a push handle.

[0009] Furthermore, the controller is provided with a rotation speed display and a regulator.

[0010] Furthermore, the rubber top cover matches the screw hole size of the fixing block.

[0011] Furthermore, the large inner diameter spiral blades and the small inner diameter spiral blades are alternately arranged on the transmission shaft.

[0012] Furthermore, the motor and the controller are integrated in a motor box of the base.

[0013] Furthermore, the mixing barrel is made of stainless steel.

[0014] Furthermore, the rubber top cover is made of silicone rubber.

[0015] The beneficial effects brought by the technical solution provided by the embodiment of the utility model are:

[0016] 1. Effectively inhibit the bleeding and water loss of super slow setting concrete. The utility model is provided with a detachable rubber top cover on the top of the mixing barrel, which is locked with screws. During the mixing process, the barrel can be kept closed to avoid direct contact between the concrete and the outside air, greatly reducing water evaporation. At the same time, the utility model adopts a low-speed mixing method to reduce the dynamic effect during the mixing process and further reduce the risk of water bleeding of the concrete. Through the above measures, the water-cement ratio of the super slow setting concrete is effectively guaranteed to be stable, ensuring its working performance.

[0017] 2. Achieve low-speed and efficient mixing to ensure uniform mixing of concrete. The utility model sets a mixing device composed of spiral blades with large and small inner diameters in the mixing barrel, and the two blades are arranged alternately. Among them, the blade with small inner diameter provides shearing effect to accelerate the dispersion of materials; the blade with large inner diameter provides extrusion effect to promote material convection. Under low-speed conditions, the combined effect of the two blades can effectively improve the mixing effect, make the distribution of concrete components more uniform, and avoid segregation.

[0018] 3. The mixing parameters can be adjusted flexibly to meet the needs of different working conditions. The control system of the utility model can realize stepless adjustment of the mixing speed. Through the speed display and regulator, the operator can optimize the mixing speed at any time according to the construction needs. At the same time, by changing the blade angle and matching method, the mixing effect can be further optimized to meet the production requirements of super slow setting concrete with different mix ratios and different dosages.

[0019] 4. The equipment is compact and efficient, and is easy to promote and apply. The utility model integrates the motor, reducer, controller and other components and arranges them on a compact base, with a simple structure, a short transmission chain and high efficiency. The overall size of the equipment is small, the weight is light, and the roller chassis is adopted, which is convenient for flexible movement and arrangement at the construction site. In addition, the technical solution of the utility model is low in cost, simple in process, and easy to promote.

[0020] 5. Improve the mechanical properties and durability of super-slow setting concrete. By effectively controlling the water loss of super-slow setting concrete, the water-cement ratio, particle distribution and other quality indicators of concrete can be guaranteed, thereby improving the workability, cohesion, anti-segregation and other properties of concrete, thereby improving the strength, density and durability of concrete after hardening.

[0021] In summary, the super-slow setting concrete mixing device provided by the utility model is optimized in design according to the characteristics of super-slow setting concrete, realizes efficient and uniform mixing under low-speed conditions, effectively solves the problem of water loss due to bleeding, ensures the performance of concrete, is easy to promote and apply, can better play the technical advantages of super-slow setting concrete, and has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 The utility model is a structural schematic diagram of a super slow setting concrete mixing device according to an embodiment of the utility model.

[0024] The numbers in the figure are: 1. controller; 2. motor box; 3. motor; 4. load-bearing platform; 5. rubber top cover; 6. screws; 7. fixing block; 8. unloading handle; 9. large inner diameter spiral belt blade; 10. fixing rod; 11. small inner diameter spiral belt blade; 12. transmission shaft; 13. mixing barrel; 14. roller; 15. push handle. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] like Figure 1 As shown, the utility model provides a super slow setting concrete mixing device, which includes a mixing barrel 13, a motor 3, a controller 1 and a base.

[0027] The mixing barrel 13 is cylindrical and made of stainless steel with good corrosion resistance and strength. A feeding port is provided on the top of the mixing barrel 13 for feeding concrete raw materials. A rubber top cover 5 is provided above the feeding port. The rubber top cover 5 is made of silicone rubber and has excellent sealing and wear resistance. The rubber top cover 5 is detachably connected to the fixing block 7 at the feeding port through a plurality of screws 6. The screws 6 match the screw hole sizes on the rubber top cover 5 and the fixing block 7. Tightening the screws can achieve sealing and fixing of the top cover, prevent the overflow of concrete materials and the entry of outside air during the mixing process, and avoid water loss during the mixing process.

[0028] A transmission shaft 12 connected to the motor 3 is provided on the left side of the mixing barrel 13. The motor 3 can provide the power required for mixing, and its speed can be adjusted by the controller 1 to meet the needs of different working conditions. The controller 1 is provided with a speed display to provide real-time feedback on the current mixing speed; at the same time, a regulator is provided to facilitate the operator to adjust the speed. The motor 3 and the controller 1 are integrated in the motor box 2 of the base, achieving a compact layout.

[0029] The transmission shaft 12 is provided with a large inner diameter spiral blade 9 and a small inner diameter spiral blade 11 along the axial direction. The two blades are arranged in a staggered manner, which can produce shearing and extrusion effects during the mixing process, thereby improving the uniformity of mixing. The large inner diameter spiral blade 9 is rigidly connected to the transmission shaft 12 through a fixing rod 10, thereby ensuring the stability of the blade. The small inner diameter spiral blade 11 is manufactured in an integrated manner with the transmission shaft 12, and has a higher structural strength.

[0030] A discharge handle 8 is provided on the right side of the mixing barrel 13. After the work is completed, the handle 8 is turned to tilt the mixing barrel 13, and the mixed concrete can be discharged smoothly.

[0031] The base includes a load-bearing platform 4, rollers 14 and a hand-pushing handle 15. The mixing barrel 13, the motor 3 and the motor box 2 are all mounted on the load-bearing platform 4, which is welded from thick-walled square tubes to ensure the stability of the device. Several rollers 14 are installed under the base, and the operator can easily move the entire device through the hand-pushing handle 15 to achieve flexible on-site layout.

[0032] When working, first add the measured concrete material into the mixing barrel 13 through the feeding port, cover the rubber cover 5 and lock it with the screw 6. Then start the motor 3, set the appropriate stirring speed through the controller 1, and the transmission shaft 12 drives the stirring blade to rotate to fully stir the concrete material. After the stirring reaches the predetermined time, turn off the motor, open the discharge handle 8, and discharge the concrete.

[0033] The preferred embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. A person skilled in the art can understand that various modifications and improvements can be made to these features and embodiments without departing from the principles and spirit of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A super slow setting concrete mixing device, comprising a mixing barrel (13), a motor (3), a controller (1), and a base, characterized in that: The top of the mixing barrel (13) is provided with a feeding port, and a rubber top cover (5) is arranged above the feeding port, and the rubber top cover (5) is detachably connected to the fixing block (7) of the feeding port by means of screws (6); a transmission shaft (12) connected to the motor (3) is arranged on the left side of the mixing barrel (13), and a large inner diameter spiral blade (9) and a small inner diameter spiral blade (11) are distributed axially on the transmission shaft (12), and the large inner diameter spiral blade (9) is connected to the transmission shaft (12) by means of a fixing rod (10); a discharge handle (8) for discharging materials is arranged on the right side of the mixing barrel (13); the controller (1) adjusts the rotation speed of the motor (3); and the base comprises a bearing platform (4), a roller (14) and a hand-push handle (15).

2. The ultra-slow setting concrete mixing device according to claim 1, characterized in that: The controller (1) is provided with a rotation speed display and a regulator.

3. The ultra-slow setting concrete mixing device according to claim 1, characterized in that: The rubber top cover (5) matches the screw hole size of the fixing block (7).

4. The ultra-slow setting concrete mixing device according to claim 1, characterized in that: The large inner diameter spiral blades (9) and the small inner diameter spiral blades (11) are arranged alternately on the transmission shaft (12).

5. The ultra-slow setting concrete mixing device according to claim 1, characterized in that: The motor (3) and the controller (1) are integrated in a motor box (2) of the base.

6. The ultra-slow setting concrete mixing device according to claim 1, characterized in that: The stirring barrel (13) is made of stainless steel.

7. The ultra-slow setting concrete mixing device according to any one of claims 1 to 6, characterized in that: The rubber top cover (5) is made of silicone rubber.

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