CN112207978A

CN112207978A - Twice mixing equipment and production process thereof

Info

Publication number: CN112207978A
Application number: CN202011037963.0A
Authority: CN
Inventors: 赵付强; 吴树广; 苑进修; 高腾飞; 杜卿; 孙宏亮; 柳军
Original assignee: Road and Bridge International Co Ltd; China Communications Road and Bridge North China Engineering Co Ltd
Current assignee: Road and Bridge International Co Ltd; China Communications Road and Bridge North China Engineering Co Ltd
Priority date: 2020-09-27
Filing date: 2020-09-27
Publication date: 2021-01-12

Abstract

The application discloses a twice mixing device and a production process thereof, relates to the technical field of civil engineering, and aims to solve the problems that the mixing uniformity of mixed materials is difficult to ensure in the related technology, the engineering quality and the durability are reduced, and the later maintenance cost is increased; the scraping mechanism comprises a first pressing rod and a second pressing rod which are hinged on the stirring shaft, a scraper is arranged at one end, away from the stirring shaft, of the first pressing rod and the second pressing rod, and the scraper is tightly attached to one side of the inner wall of the first stirring bin and one side of the inner wall of the second stirring bin. This scheme is mixed two jars and is established ties, reaches the purpose that the extension was mixed the time to guarantee the homogeneity that the concrete was stirred, and utilize to scrape the concrete that material mechanism will adhere on the inner wall and scrape down, be convenient for improve the stirring mixing quality, be favorable to arranging material completely, improve overall utilization.

Description

Twice mixing equipment and production process thereof

Technical Field

The application relates to the technical field of civil engineering, in particular to twice mixing equipment and a production process thereof.

Background

At present, most of concrete is delivered by a commercial mixing station and a tank truck, a traditional forced mixer configured in the commercial mixing station can uniformly mix the concrete in a short time, but careful observation shows that partial cement lumps in the concrete are not scattered, and the abdominal fine aggregates on the surface of aggregates are not uniform or even absent, so that the performance of the concrete is seriously restricted by the phenomenon; the construction site is away from the concrete mixing plant for a certain distance, because of the characteristics of the concrete, the road condition and the construction condition, the problems of slump loss, segregation, reduced mechanical property and the like of different degrees can occur before the concrete transported by the tank car reaches the construction site for use, most of construction parties still use the concrete which does not reach the standard in the engineering in order to save the cost, and particularly, part of construction personnel are labor-saving and inject water into the concrete tank car to meet the pumping or paving of the concrete, so the method not only reduces the engineering quality and the durability, but also increases the later maintenance cost, and the concrete with slump loss not only accelerates the abrasion of a pumping device but also seriously influences the exertion of the pumping capacity of the concrete; therefore, in order to ensure the performance of the concrete used in the construction site and improve the engineering quality, the concrete is a problem which needs to be solved urgently by the technical personnel in the field.

Disclosure of Invention

The application mainly aims to provide twice mixing equipment and a production process thereof, so that the problem that the mixing uniformity of mixed materials is difficult to ensure in the related technology is solved, the engineering quality and the durability are reduced, and the later maintenance cost is increased.

In order to achieve the above object, in a first aspect, the present application provides a double kneading apparatus comprising:

the stirring device comprises a first stirring bin and a second stirring bin which are connected in series through a conveying pipe, wherein stirring shafts are arranged in the first stirring bin and the second stirring bin, and scraping mechanisms are arranged on the stirring shafts;

the scraping mechanism comprises a first pressing rod and a second pressing rod hinged to the stirring shaft, a scraping plate is arranged at one end, away from the stirring shaft, of the first pressing rod and the second pressing rod, and the scraping plate is tightly attached to one side of the inner wall of the first stirring bin and one side of the inner wall of the second stirring bin.

Optionally, the first compressing rod and the second compressing rod are both provided with shaft sleeves, and the first compressing rod and the second compressing rod are connected with the stirring shaft through the shaft sleeves.

Optionally, the inner wall surfaces of the first stirring bin and the second stirring bin are provided with composite friction-resistant coating films.

Optionally, a driving part is arranged on one side of the conveying pipe, a main rod is arranged on an output shaft of the driving part, and material pushing pieces are spirally arranged on the periphery side of the main rod along the axial direction of the main rod.

Optionally, a flow deflector is arranged at one end, close to the first stirring bin, of the main rod, and the flow deflector is radially arranged along the main rod.

Optionally, the mobile jib is close to second stirring storehouse one end and is equipped with the fairing, the fairing radially sets up a plurality ofly along the mobile jib.

Optionally, at least four groups of pressure sensors for weighing the cement in the second stirring bin in real time are arranged on the corners of the second stirring bin, and the pressure sensors are in communication connection with control ends for controlling the driving piece to act.

In a second aspect, the application also provides a production process of the twice mixing device, which comprises the twice mixing device.

In the embodiment of the application, a production process of a twice mixing device is provided, which comprises the following steps:

s1, loading the two-time mixing equipment into a construction site and then parking the mixing equipment at a construction position, and then butting a discharge chute of the concrete tank truck with the feed end of the first mixing bin;

s2, a pneumatic reversing valve is shifted, a power takeoff drives a continuous vibration stirrer and a generator to operate through a driving wheel and a coupler, a stirring shaft reaches a rated rotating speed and the frequency of a frequency converter is set, so that concrete is stirred in a first stirring bin in a vibration mode, and meanwhile, concrete adhered to the inner wall is scraped by a scraping mechanism under the driving of the stirring shaft to be fully stirred;

s3, after the first mixing is finished, the concrete enters the feeding end of the second mixing bin from the discharging end of the first mixing bin through the conveying pipe, and the concrete is subjected to secondary continuous vibration mixing under the working of the continuous vibration mixer in the same way;

s4, in the whole mixing process, according to the detection data of the pressure sensor, the control end controls the feeding and discharging speed of the second mixing bin, so that the concrete in the second mixing bin is kept on a preset low-high standard line, and the condition that the supply is interrupted instantly due to the fact that the concrete is damped and agglomerated or used up in production is avoided.

The invention has the beneficial effects that:

first stirring storehouse, second stirring storehouse through the conveying pipeline looks series connection to mixing two jars and establishing ties, reaching the purpose that the extension mixes the time, in order to guarantee the homogeneity that the concrete was mixed, and utilize scraping the concrete that the material mechanism will adhere on the inner wall and scrape down, be convenient for improve stirring mixing quality, be favorable to arranging the material completely, improve overall utilization.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural view of a double mixing apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic view of the internal structure of a first mixing bin and a second mixing bin of a double mixing apparatus according to an embodiment of the present invention;

FIG. 3 is a schematic view showing the internal structure of a feed conveyor pipe in a double mixing apparatus according to an embodiment of the present invention.

Description of reference numerals:

1. a delivery pipe; 11. a first stirring bin; 12. a second stirring bin; 13. a stirring shaft; 2. a scraping mechanism; 21. a first hold down bar; 22. a second hold down bar; 23. a squeegee; 24. a shaft sleeve; 31. a drive member; 32. a main rod; 33. pushing the material sheet; 34. a flow deflector; 35. a commutator segment; 4. a pressure sensor.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

In addition, the term "plurality" shall mean two as well as more than two.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example 1:

a double-mixing device is shown in figures 1 and 2 and comprises a first mixing bin 11 and a second mixing bin 12 which are connected in series through a conveying pipe 1, so that two mixing cylinders are connected in series, the purpose of prolonging mixing time is achieved, and the uniformity of concrete mixing is guaranteed. In the embodiment of the invention, the first stirring bin 11 and the second stirring bin 12 both adopt continuous vibration stirrers, and it can be seen that in the stage 1, stirring is mainly realized by the circular flow of materials, the stirring process is carried out at a macroscopic level, and the diffusion phenomenon is not obvious; stage 2, diffusion distribution is accelerated, the functions of the circular flow and the diffusion motion in mixing tend to be similar, and redistribution of each component is carried out on a microscopic level; in the 3 rd stage, the circulating flow effect is not large, and the diffusion movement plays a main role, so that in a perfect stirring process, the material displacement must be completed by well-matched convection movement and diffusion movement, and a theoretical basis is provided for strengthening the diffusion movement by adopting a vibration stirring technology. In addition, all be equipped with (mixing) shaft 13 in first stirring storehouse 12 and the second stirring storehouse 12, be equipped with scraping mechanism 2 on the (mixing) shaft 13 to scrape the concrete that will adhere on the inner wall down, be convenient for improve the stirring mixing quality, be favorable to arranging the material completely, improve overall utilization. Specifically, the scraping mechanism 2 comprises a first pressing rod 21 and a second pressing rod 22 hinged on the stirring shaft 13, a scraping plate 23 is arranged at one end of each of the first pressing rod 21 and the second pressing rod 22, which is far away from the stirring shaft 13, and the scraping plate 23 is tightly attached to one side of the inner wall of the first stirring bin 11 and one side of the inner wall of the second stirring bin 12.

As shown in fig. 1 and 2, the first pressing rod 21 and the second pressing rod 22 are respectively provided with a shaft sleeve 24, and the first pressing rod 21 and the second pressing rod 22 are connected with the stirring shaft 13 through the shaft sleeves 24, so that the screw can be used for completing the dismounting and mounting of the scraping mechanism 2, the operation is convenient and fast, and the working efficiency can be effectively improved. First stirring storehouse 11, the 12 inner wall surfaces in second stirring storehouse have plated compound antifriction coating film, can play the effect of on the one hand non-sticking concrete, and on the other hand scraper blade 23 constantly rubs with the inner wall, can wear and tear the bucket wall, consequently plates this compound antifriction coating film after, effectively prolongs the life in first stirring storehouse 11, second stirring storehouse 12, practices thrift the maintenance cost.

As shown in fig. 1 and 3, a driving member 31 is provided on one side of the feeding pipe 1, a main rod 32 is provided on an output shaft of the driving member 31, and a material pushing piece 33 is spirally provided on the circumferential side of the main rod 32 along the axial direction thereof. In this embodiment of the present invention, the stepping motor is selected as the driving member 31 to achieve the effect of spiral feeding, so that the main rod 32 is driven to rotate by the stepping motor, and the material pushing piece 33 on the main rod 32 moves accordingly, thereby ensuring that the concrete can be fed into the second mixing bin 12 along the material pushing piece 33, and the feeding and discharging are smoother.

In order to ensure the uniformity and smoothness during feeding and discharging, as shown in fig. 1 and 3, a deflector 34 is arranged at one end of the main rod 32 close to the first mixing bin 11, a commutator 35 is arranged at one end of the main rod 32 close to the second mixing bin 12, concrete is introduced from the deflector 34 and is delivered to the commutator 35 through the pushing sheet 33 during the rotation of the main rod 32, and the advancing commutator 35 smoothly pushes out the concrete by using centrifugal force, thereby ensuring that the discharging is not blocked. In order to further improve the discharging uniformity, a plurality of flow deflectors 34 are arranged along the radial direction of the main rod 32, so that the flow of concrete can be increased before pushing; the plurality of commutator segments 35 are arranged along the radial direction of the main rod 32, so that the concrete can be uniformly pushed out during discharging.

As shown in fig. 1, at least four sets of pressure sensors 4 for weighing cement in the second mixing bin 12 in real time are arranged at the corners of the second mixing bin, and the pressure sensors 4 are in communication connection with a control end for controlling the driving member 31 to act. This pressure sensor 4 is used for weighing the cement in the second stirring storehouse 12, plays real-time supervision's effect to according to pressure sensor 4's detected data, control feeding ejection of compact speed, make the concrete in the second stirring storehouse 12 keep on predetermined low high level standard line, have the sufficient concrete throughout promptly and guarantee follow-up proportion work of mixing, and ensure that the concrete is constantly expected not to overload and not to agglomerate in the second stirring storehouse 12.

Example 2:

a production process of a double mixing device, as shown in fig. 1 to 3, comprising the following steps:

s1, loading the two-time mixing equipment into a construction site and then parking the mixing equipment at a construction position, and then butting a discharge chute of the concrete tank truck with the feed end of the first mixing bin 11;

s2, a pneumatic reversing valve is shifted, a power takeoff drives a continuous vibration stirrer and a generator to operate through a driving wheel and a coupler, so that a stirring shaft 13 reaches a rated rotating speed and the frequency of a frequency converter is set, concrete is stirred in a first stirring bin 11 in a vibration mode, and meanwhile, concrete adhered to the inner wall is scraped by a scraping mechanism 2 under the driving of the stirring shaft 13 and is fully stirred;

s3, after the first mixing is finished, the concrete enters the feeding end of the second mixing bin 12 from the discharging end of the first mixing bin 11 through the conveying pipe 1, and the concrete is subjected to secondary continuous vibration mixing under the working of the continuous vibration mixer in the same way;

s4, in the whole mixing process, according to the detection data of the pressure sensor 4, the control end controls the feeding and discharging speed of the second mixing bin 12, so that the concrete in the second mixing bin 12 is kept on a preset low-high standard line, and the condition that the supply is interrupted instantly due to damp caking or exhaustion of the concrete in production is avoided.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A twice mixing device is characterized by comprising a first mixing bin (11) and a second mixing bin (12) which are connected in series through a conveying pipe (1), wherein mixing shafts (13) are arranged in the first mixing bin (11) and the second mixing bin (12), and scraping mechanisms (2) are arranged on the mixing shafts (13);

the scraping mechanism (2) comprises a first pressing rod (21) and a second pressing rod (22) which are hinged to the stirring shaft (13), one ends of the first pressing rod (21) and the second pressing rod (22) far away from the stirring shaft (13) are provided with scraping plates (23), and the scraping plates (23) are tightly attached to one sides of the inner walls of the first stirring bin (11) and the second stirring bin (12).

2. A twice mixing apparatus as claimed in claim 1, wherein the first pressing bar (21) and the second pressing bar (22) are provided with bushings (24), and the first pressing bar (21) and the second pressing bar (22) are connected to the mixing shaft (13) through the bushings (24).

3. A twice mixing apparatus as claimed in claim 2, wherein the inner wall surfaces of the first stirring chamber (11) and the second stirring chamber (12) are provided with composite friction-resistant coatings.

4. A double kneading apparatus according to claim 1, wherein the feed conveyor pipe (1) is provided at one side thereof with a driving member (31), the driving member (31) is provided at an output shaft thereof with a main rod (32), and the main rod (32) is spirally provided at a peripheral side thereof with a pusher piece (33) in an axial direction thereof.

5. A double mixing apparatus as claimed in claim 4, characterised in that the primary shaft (32) is provided with baffles (34) at one end adjacent the first mixing chamber (11), the baffles (34) being arranged radially of the primary shaft (32).

6. A double mixing apparatus as claimed in claim 5, characterised in that the end of the primary shaft (32) adjacent the second mixing chamber (12) is provided with fairings (35), the fairings (35) being arranged radially of the primary shaft (32).

7. A twice mixing equipment as claimed in claim 6, wherein at least four sets of pressure sensors (4) for weighing cement in the second mixing bin (12) in real time are arranged at the corners of the second mixing bin, and the pressure sensors (4) are connected with a control end for controlling the action of the driving member (31) in a communication way.

8. A process for the production of a two-time amalgamator including a two-time amalgamator according to any one of claims 1 to 7, comprising the steps of:

s1, loading the two-time mixing equipment into a construction site and then parking the mixing equipment at a construction position, and then butting a discharge chute of the concrete tank truck with the feed end of the first mixing bin (11);

s2, a pneumatic reversing valve is shifted, a power takeoff drives a continuous vibration stirrer and a generator to operate through a driving wheel and a coupler, so that a stirring shaft (13) reaches a rated rotating speed and the frequency of a frequency converter is set, concrete is stirred in a first stirring bin (11) in a vibration mode, and meanwhile, concrete adhered to the inner wall is hung and scraped by a scraping mechanism (2) under the driving of the stirring shaft (13) to be fully stirred;

s3, after the first mixing is finished, the concrete enters the feeding end of the second mixing bin (12) from the discharging end of the first mixing bin (11) through the conveying pipe (1), and the concrete is subjected to secondary continuous vibration mixing under the working of the continuous vibration mixer in the same way;

s4, in the whole mixing process, according to the detection data of the pressure sensor (4), the control end controls the feeding and discharging speed of the second mixing bin (12), so that the concrete in the second mixing bin (12) is kept on a preset low-high standard line, and the condition that the supply is interrupted instantly when the concrete is damped and agglomerated or used up in production is avoided.