Efficient energy-saving stirring device for construction site

Abstract

The invention discloses an efficient energy-saving stirring device for a construction site in the technical field of stirring, which comprises a stirring cylinder, a controller is fixedly connected to the stirring cylinder, and a stirring assembly is arranged in the stirring cylinder; the stirring assembly comprises a stirring shaft, a plurality of stirring blades are arranged on the outer side of the stirring shaft, and the stirring shaft is provided with a driving part; a hollow cavity is formed in the stirring shaft, the hollow cavity communicates with a water supply source, the water supply source is used for injecting liquid into the hollow cavity, a plurality of injection heads are arranged on the stirring shaft, one-way valves are arranged in the injection heads and communicate with the hollow cavity, and a resistance detection assembly is arranged on one side of each injection head and used for detecting the stirring resistance value; the controller is used for obtaining the stirring resistance values collected by the resistance detection assembly, and the controller controls the injection head with the maximum corresponding stirring resistance value to spray out liquid in each stirring period. By adopting the technical scheme of the invention, water can be added to an area with high viscosity through resistance detection, the hydration reaction of the area with high viscosity is promoted, and the resistance to be overcome by stirring is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of mixing, in particular to a high-efficiency energy-saving mixing device for a construction site. Background Art

[0002] A mixer is a construction machinery, mainly used to mix cement, sand, various dry mortar and other construction materials. It is a machine with a bladed shaft rotating in a cylinder or trough to mix and stir various raw materials to make a mixture or a suitable consistency. With the rapid development of science and technology, energy-saving mixers used in construction sites have also been improved. The mixing efficiency of the mixer is related to the factors of material movement, inefficient area, overall circulation flow, and local staggered flow. Existing mixers have problems such as inconvenient placement of tools, uneven mixing, and unsatisfactory energy-saving effects.

[0003] In the prior art, for example, patent publication number CN110975713B discloses a high-efficiency energy-saving stirring device for construction sites, which increases local staggered flow during stirring by setting a horizontal annular stirring frame in a hollow cylinder and cooperating with a vertical stirring frame in the hollow cylinder to promote stirring efficiency. Patent publication number CN208232064U discloses an energy-saving mixer for construction sites, which drives the first gear, the second gear and the third gear to rotate at a uniform speed through the rotation of the active gear, so that the first stirring blade, the second stirring blade and the third stirring blade are stirred at a uniform speed, expanding the overall circulation flow efficiency and making the stirring more uniform. However, during the stirring process, the fluidity of the raw material will change after contact with water. The greater the fluidity, the lower the load during the stirring process, and the smaller the fluidity, the higher the load during the stirring process. The faster the raw material is in full contact with water, the lower the power consumption required for stirring. Therefore, a high-efficiency energy-saving stirring device that can consume lower power consumption to complete stirring is needed. Summary of the invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide a high-efficiency and energy-saving stirring device for construction sites, which can add water to areas with high viscosity through resistance detection, promote hydration reaction in areas with high viscosity, and reduce the resistance that needs to be overcome for stirring.

[0005] In order to achieve the above-mentioned object, the technical solution of the present invention is as follows: a high-efficiency energy-saving mixing device for use at a construction site, comprising a mixing drum, a controller is fixedly connected to the mixing drum, and a mixing assembly is arranged in the mixing drum;

[0006] The stirring assembly comprises a stirring shaft, a plurality of stirring blades are fixedly connected to the outer side of the stirring shaft, and the stirring shaft is provided with a driving member, and the driving member is used to drive the stirring shaft to rotate;

[0007] A hollow cavity is provided in the stirring shaft, and the hollow cavity is connected to a water supply source, and the water supply source is used to inject liquid into the hollow cavity. A plurality of injection heads are provided on the stirring shaft, and a one-way valve is provided in the injection head, and the one-way valve is connected to the hollow cavity. A resistance detection component is provided on one side of the injection head, and the resistance detection component is used to detect the stirring resistance value;

[0008] The controller is used to obtain the stirring resistance value collected by the resistance detection component, and control the injection head corresponding to the area with the maximum stirring resistance value to spray liquid in each stirring cycle.

[0009] The following beneficial effects are achieved by adopting the above scheme:

[0010] 1. The driving part is used to drive the stirring shaft to rotate, so that the stirring shaft drives the stirring blades to mix the raw materials in the mixing drum.

[0011] 2. The resistance detection component will move with the stirring shaft to detect the flow resistance of the raw materials in each area of ​​the mixing drum. The flow resistance can feedback the hydration degree of the raw materials. The lower the hydration degree, the greater the viscosity and the greater the movement resistance. The controller will control the injection head with the largest stirring resistance value to spray liquid in each stirring cycle to increase the hydration degree of the area with the largest stirring resistance value, make up for the difference in hydration degree between this area and other areas, and at the same time reduce the resistance value in the subsequent stirring process and reduce the load on the drive parts, thereby achieving energy saving effects.

[0012] 3. By promoting hydration in the area with the largest stirring resistance value, the stirring uniformity can be improved, the overall fluidity can be promoted, the stirring process can be accelerated, and the stirring efficiency can be improved.

[0013] 4. The liquid sprayed from the injection head is not limited to clean water, but also includes various admixture solutions used in construction, such as retarder, water reducer and air entraining agent, etc. While carrying out hydration balance, it also makes the admixture distribution more uniform.

[0014] Compared with the existing technology, by associating the resistance value during stirring with the hydration degree of the raw materials, the hydration process in the large resistance area is promoted, the stirring load increase caused by insufficient hydration degree in some areas is reduced, and the load on the driving parts during the stirring process is reduced. At the same time, hydration promotes the fluidity of the raw materials in the mixing drum and improves the stirring efficiency.

[0015] Furthermore, an inner spiral belt is wound around the outside of the stirring shaft, and the inner spiral belt is fixedly connected to the stirring shaft.

[0016] Beneficial effect: The raw materials in the vicinity of the stirring shaft are at a lower linear speed due to their smaller distance from the center of rotation of the stirring shaft, and the shear and collision amplitude between the raw materials is smaller. Therefore, a spiral ribbon is wound around the stirring shaft, which can drive the raw materials in the vicinity of the stirring shaft to roll and improve the mixing efficiency of the low-efficiency area.

[0017] Furthermore, an inclined plate is provided on one side of the inner spiral belt close to the stirring shaft, one side of the inclined plate is fixedly connected to the inner spiral belt, and the other side of the inclined plate is fixedly connected to the stirring shaft.

[0018] Beneficial effect: The inclined plate allows the raw materials near the stirring shaft to move along the inclined plate, thereby being guided to the outer circle, promoting the inner and outer circle circulation during the stirring process, and optimizing the working coverage of the low-efficiency area.

[0019] Furthermore, the injection heads are all connected to the mixing drum through the inclined plate, and the resistance detection components are all fixedly connected to the inclined plate.

[0020] Beneficial effect: Since the stirring efficiency of the raw materials near the stirring shaft is lower, the resistance there can reflect the lowest value of the stirring resistance in the area, making the detected resistance more representative.

[0021] Furthermore, the tilting plate is made of elastic material, and a plurality of vibration motors are arranged inside the tilting plate.

[0022] Beneficial effects: The vibration motor can cause the inclined plate to vibrate, so that the raw materials around the inclined plate slide along the inclined surface under vibration, while promoting the mixing of raw materials in the low-efficiency area and increasing the collision probability of raw materials in the low-efficiency area. The resistance detection component vibrates with the vibration motor, so that the resistance detection component can also obtain the resistance value that hinders the flow of raw materials when the stirring shaft is not rotating.

[0023] Furthermore, the resistance detection component includes a sensor plate, and a plurality of pressure sensors are arranged on the sensor plate.

[0024] Beneficial effect: The lower the hydration degree of the raw material, the greater the viscosity, the greater the stirring resistance, and the greater the pressure generated between the sensor plate and the raw material when the sensor plate moves. The pressure sensor can detect the pressure and provide resistance feedback.

[0025] Furthermore, the sensor plate is perpendicular to the tangent line of the inner spiral belt, and the sensor plates are located on one side of the injection head along the rotation direction of the driving member.

[0026] Beneficial effect: The sensor plate is perpendicular to the tangent of the inner spiral belt, which can increase the driving effect during rotation. At the same time, it can push away the raw materials as they rotate, reduce the contact efficiency between the raw materials and the injection head, make the injection head less likely to be stuck by the raw materials, and reduce the maintenance times of the injection head.

[0027] Furthermore, the controller is used to control the amount of liquid released. The raw material ratio is preset in the controller. Before stirring, the injection head is controlled to release 75% to 90% of the liquid in the raw material ratio, and the remaining liquid is released during the stirring process.

[0028] Beneficial effect: When using the injection head for hydration balance, if additional solution is added, the product will deviate from the original formula. For example, when mixing concrete, excessive water reduces the binding force between particles, thereby reducing the strength of the concrete. Therefore, the controller releases the liquid in two stages. At the beginning of mixing, 75% to 90% of the liquid in the raw material ratio is added at one time, and the remaining liquid is released during the mixing process to ensure the final mixing ratio effect.

[0029] Furthermore, the stirring blade is a blade type or a spiral ribbon type, and the stirring drum is a vertical type or a horizontal type.

[0030] Beneficial effects: The stirring structure can be applied to blade-type or spiral-ribbon-type mixers, vertical or horizontal mixers. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic cross-sectional structural diagram of an embodiment of the present invention.

[0032] Figure 2 It is a schematic diagram of the axonometric structure of an embodiment of the present invention.

[0033] Figure 3 Schematic diagram of the structure of the inclined plate.

[0034] Figure 4 It is a schematic isometric diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0035] The following is further described in detail through specific implementation methods:

[0036] The figure marks in the drawings of the specification include: mixing drum 1, controller 2, mixing blade 3, driving member 4, water supply source 5, injection head 6, resistance detection component 7, inner screw belt 8, inclined plate 9, sensor plate 10, pressure sensor 11, gear 12.

[0037] Embodiment 1

[0038] The embodiment is basically as shown in the attached Figure 1 To Attachment Figure 4 As shown:

[0039] A high-efficiency energy-saving mixing device for construction sites comprises a mixing drum 1. A controller 2 is fixed to the mixing drum 1 by screws. The model of the controller 2 is STM32F103C8T6. A mixing assembly is installed in the mixing drum 1. The mixing drum 1 is provided with a material inlet and a material outlet.

[0040] The user can fill in and take out the raw materials through the inlet and outlet.

[0041] The stirring assembly includes a casing, which is rotatably connected to a stirring shaft, a plurality of stirring blades 3 are bolted to the outer side of the stirring shaft, and a driving member 4 is provided on the stirring shaft. The driving member 4 is a motor, which drives the stirring shaft to rotate through a gear 12, and the driving member 4 is bolted to the casing.

[0042] The driving member 4 is used to drive the stirring shaft to rotate, so that the stirring shaft drives the stirring blades 3 to rotate, and drives the raw materials in the stirring drum 1 to mix.

[0043] A hollow cavity is provided in the stirring shaft, and the hollow cavity is connected to a water supply source 5. One end of the stirring shaft is rotatably connected to the water supply source 5, and the water supply source 5 is used to inject liquid into the hollow cavity. A plurality of injection heads 6 are installed on the stirring shaft, and a one-way valve is provided in the injection head 6. The one-way valves are all connected to the hollow cavity. A resistance detection component 7 is installed on one side of the injection head 6, and the resistance detection component 7 is used to detect the stirring resistance value.

[0044] One end of the stirring shaft is rotatably connected to the water supply source 5, so that the water supply source 5 can continuously inject liquid when the stirring shaft rotates. The motor drives the stirring shaft to rotate through the gear 12, so that the motor does not need to be installed at the end of the stirring shaft, but is driven through the gear 12 coaxial with the stirring shaft. The one-way valve in the injection head 6 is used to control the release of the liquid, and the one-way valve is used to prevent the raw material from backflowing and clogging the injection head 6. The one-way valve is controlled by an electrical signal, and the resistance detection component 7 on the stirring shaft and the one-way valve are powered by electrical contacts.

[0045] The controller 2 is used to obtain the stirring resistance value collected by the resistance detection component 7. The controller 2 controls the injection head 6 to spray liquid in the area corresponding to the maximum stirring resistance value in each stirring cycle.

[0046] As stirring begins, the raw materials will be mixed and will change from an uneven state to a uniform state. In this process, raw materials such as cement and sand will undergo hydration reactions to form viscous products, but there will still be local uneven hydration in the early stage of stirring, causing the raw materials to have high viscosity in some areas and low viscosity in others. The viscosity reflects the flow resistance of the fluid. When the viscosity is high, the stirring resistance increases, which increases the load of the drive 4, increases power consumption, and has low fluidity of the raw materials and poor mixing efficiency.

[0047] The controller 2 collects the detection information of the resistance detection component 7 to determine the low hydration area with high resistance. The controller 2 controls the injection head 6 to release the liquid to balance the hydration degree of each area, reduce the stirring resistance, and thus reduce the load of the driving member 4. The stirring efficiency is enhanced by improving the fluidity of the raw materials.

[0048] Embodiment 2

[0049] The difference from the above embodiment is that an inner spiral belt 8 is wound around the outside of the stirring shaft, the inner spiral belt 8 is integrally formed with the stirring shaft, an inclined plate 9 is provided on the side of the inner spiral belt 8 close to the stirring shaft, one side of the inclined plate 9 is bonded and fixed to the inner spiral belt 8, and the other side of the inclined plate 9 is bonded and fixed to the stirring shaft.

[0050] The raw materials in the vicinity of the stirring shaft are at a lower linear speed due to their smaller distance from the center of rotation of the stirring shaft, and the shear and collision amplitude between the raw materials is smaller. Therefore, a spiral ribbon is wound around the stirring shaft, and the spiral ribbon can drive the raw materials in the vicinity of the stirring shaft to roll and improve the mixing efficiency of the inefficient area. The inclined plate 9 guides the raw materials in the vicinity of the stirring shaft to move away from the stirring shaft, thereby obtaining a better stirring effect.

[0051] The injection heads 6 are all connected to the mixing drum 1 through the inclined plate 9, and the resistance detection components 7 are all fixedly connected to the inclined plate 9. The resistance detection components 7 include a sensor plate 10, on which a plurality of pressure sensors 11 are provided. The inclined plate 9 is made of elastic material, and a plurality of vibration motors are provided in the inclined plate 9. The sensor plates 10 are perpendicular to the tangent of the inner screw belt 8, and the sensor plates 10 are all located on one side of the injection head 6 along the rotation direction of the driving member 4.

[0052] Since the stirring efficiency of the raw materials near the stirring shaft is lower, the resistance there can reflect the lowest value of the stirring resistance in the area, making the detected resistance more representative, and the release of the liquid will also focus on the inefficient area. The vibration motor can cause the inclined plate 9 to vibrate, so that the raw materials around the inclined plate 9 slide along the inclined surface under vibration, while promoting the mixing of the raw materials in the inefficient area and increasing the collision probability of the raw materials in the inefficient area. And the resistance detection component 7 follows the vibration of the vibration motor, so that the resistance detection component 7 can also obtain the resistance value that hinders the flow of the raw materials when the stirring shaft is not rotating. The sensor plate 10 is perpendicular to the tangent of the inner spiral belt 8, which can increase the driving effect during rotation. At the same time, the raw materials can be pushed away as the rotation is turned, reducing the contact efficiency between the raw materials and the injection head 6, making the injection head 6 less likely to be stuck by the raw materials, and reducing the maintenance times of the injection head 6. At the same time, the vibration motor can continue to act around the injection head 6, reducing the probability of the raw materials solidifying in the injection head 6 due to no action.

[0053] The controller 2 is used to control the amount of liquid released. The raw material ratio is preset in the controller 2. Before stirring, the injection head 6 is controlled to release 75% to 90% of the liquid in the raw material ratio, and the remaining liquid is released during the stirring process.

[0054] When using the injection head 6 for hydration balance, if additional solution is added, the product will deviate from the original formula. For example, when mixing concrete, excessive water reduces the binding force between particles, thereby reducing the strength of the concrete. Therefore, the controller 2 releases the liquid in two stages, adding 75% to 90% of the liquid in the raw material ratio at one time at the beginning of mixing, and the remaining liquid is released during the mixing process to ensure the final mixing ratio effect.

[0055] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A high-efficiency energy-saving stirring device for construction sites, characterized in that: It comprises a mixing drum, a controller is fixedly connected to the mixing drum, and a mixing assembly is arranged in the mixing drum; The stirring assembly comprises a stirring shaft, a plurality of stirring blades are fixedly connected to the outer side of the stirring shaft, and the stirring shaft is provided with a driving member, and the driving member is used to drive the stirring shaft to rotate; A hollow cavity is provided in the stirring shaft, and the hollow cavity is connected to a water supply source, and the water supply source is used to inject liquid into the hollow cavity. A plurality of injection heads are provided on the stirring shaft, and a one-way valve is provided in the injection head, and the one-way valve is connected to the hollow cavity. A resistance detection component is provided on one side of the injection head, and the resistance detection component is used to detect the stirring resistance value; The controller is used to obtain the stirring resistance value collected by the resistance detection component. The controller controls the injection head in the area with the maximum stirring resistance value to spray liquid in each stirring cycle.

2. The high-efficiency energy-saving stirring device for construction sites according to claim 1 is characterized in that: An inner spiral belt is wound around the stirring shaft, and the inner spiral belt is fixedly connected to the stirring shaft.

3. The high-efficiency energy-saving stirring device for construction sites according to claim 2 is characterized in that: An inclined plate is provided on one side of the inner spiral belt close to the stirring shaft, one side of the inclined plate is fixedly connected to the inner spiral belt, and the other side of the inclined plate is fixedly connected to the stirring shaft.

4. The high-efficiency energy-saving stirring device for construction sites according to claim 3 is characterized in that: The injection heads are all connected with the mixing drum through the inclined plate, and the resistance detection components are all fixedly connected to the inclined plate.

5. The high-efficiency energy-saving stirring device for construction sites according to claim 4 is characterized in that: The tilting plate is made of elastic material and a plurality of vibration motors are arranged inside the tilting plate.

6. The high-efficiency energy-saving stirring device for construction sites according to claim 5, characterized in that: The resistance detection component comprises a sensor plate, on which a plurality of pressure sensors are arranged.

7. The high-efficiency energy-saving stirring device for construction sites according to claim 6, characterized in that: The sensing plate is perpendicular to the tangent line of the inner spiral belt, and the sensing plate is located on one side of the injection head along the rotation direction of the driving member.

8. The high-efficiency energy-saving stirring device for construction sites according to claim 7, characterized in that: The controller is used to control the amount of liquid released. The raw material ratio is preset in the controller. Before stirring, the injection head is controlled to release 75% to 90% of the liquid in the raw material ratio, and the remaining liquid is released during the stirring process.

9. The high-efficiency energy-saving stirring device for construction sites according to claim 8, characterized in that: The stirring blade is a blade type or a spiral ribbon type.

10. The high-efficiency energy-saving stirring device for construction sites according to claim 9, characterized in that: The mixing drum is either vertical or horizontal.

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