Mixing equipment for secondary mixing

Abstract

The utility model discloses secondary mixing equipment which comprises a first mixing assembly and a second mixing assembly, the first mixing assembly comprises a first mixer, and the second mixing assembly comprises a second mixer. The first material mixing assembly and the second material mixing assembly are arranged in the material mixing device, materials can be mixed twice, the efficiency and the precision are both considered through a staged mixing mechanism, the material mixing device is simple in structure and convenient to operate, and the material mixing device is suitable for large-scale popularization and application. Primary mixing is carried out through the conical mixer, power loss is reduced through gravity, material discharging is facilitated, secondary mixing is carried out through the cylindrical mixer, stirring is stable, mechanical loads are reduced, and the service life of equipment is prolonged; according to the utility model, material transition is carried out between the first mixing assembly and the second mixing assembly through the transfer pipe, so that a worker can conveniently observe the uniformity degree of materials subjected to primary mixing.

Description

Technical Field

[0001] This utility model relates to the field of raw liquid mixing technology, and in particular to a mixing device for secondary mixing. Background Technology

[0002] Polyurethane raw materials are generally divided into multiple components. In actual use, these components usually need to be mixed evenly in a certain proportion and chemically reacted under the action of a catalyst to form polyurethane materials.

[0003] As shown in the novel mixing head disclosed in application number CN201720207434.8, current mixing devices for polyurethane generally only have a single head for mixing. A single head can only perform one mixing operation, which may limit the mixing effect. Furthermore, the head in a single-head mixing device needs to work under high load for a long time, which will affect the service life of the head. Therefore, improvements are needed.

[0004] In addition, staff cannot observe the mixing effect inside the mixer and cannot determine whether the mixing work is completed. This defect also needs to be improved. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a secondary mixing device to solve the problems mentioned in the background section.

[0006] This utility model provides the following technical solution: a mixing device for secondary mixing, including a first mixing component and a second mixing component, wherein the first mixing component includes a first mixer and the second mixing component includes a second mixer, and the primary discharge pipe at the lower end of the first mixer is connected to the secondary feed port inside the second mixer through a transfer pipe.

[0007] The first mixer is a conical mixer, meaning that the primary stirring shaft inside the first mixer is designed with a diameter that gradually decreases from top to bottom. The second mixer is a cylindrical mixer, meaning that the secondary stirring shaft inside the second mixer is designed with a constant diameter from top to bottom. Furthermore, both the primary and secondary stirring shafts have multiple arc-shaped flanges with the same lateral extension distance arranged vertically on their outer curved surfaces.

[0008] Preferably, the first mixer includes a first stirring seat, the first stirring seat is provided with a first stirring chamber for accommodating the primary stirring shaft, the first stirring seat is provided with a first end cover, the first end cover is equipped with a first motor connected to the primary stirring shaft and used to drive the primary stirring shaft to rotate, the primary discharge pipe is installed at the lower end of the first stirring seat, and the first end cover is provided with a primary feed port;

[0009] The second mixer includes a second mixing seat, which has a second mixing chamber for accommodating the secondary mixing shaft. The second mixing seat is provided with a second end cap, and a second motor connected to the secondary mixing shaft and used to drive the secondary mixing shaft to rotate is mounted on the second end cap. The secondary feed inlet is located inside the second end cap and opens into the second mixing chamber. The lower end of the second mixing seat is equipped with a secondary discharge pipe.

[0010] Preferably, the primary discharge pipe and the first mixing seat, and the secondary discharge pipe and the second mixing seat are respectively locked by flanges.

[0011] Preferably, the first end cap includes a frustum and a boss integrally formed on the frustum. The first motor is fixed on the boss. The upper edge of the outer side of the first stirring seat is expanded outward to form a first ring. A locking sleeve is also provided outside the first stirring seat. The locking sleeve presses the first ring upward into the frustum. The locking sleeve is fixed to the lower end of the frustum by a first bolt. The primary feed port is obliquely arranged inside the frustum.

[0012] Preferably, the second end cap is cylindrical, and the outer curved surface of the second stirring seat is integrally formed with a second ring sleeve, which is fixed to the lower end of the second end cap by a second bolt.

[0013] Preferably, there are three primary feed inlets, arranged around the axis of the first end cap.

[0014] Preferably, the diameter of the first stirring chamber also gradually decreases in the downward direction, so that the distance between the arc-shaped flange on the primary stirring shaft and the wall of the first stirring chamber is equal.

[0015] This utility model provides a mixing device for secondary mixing, which has the following beneficial effects:

[0016] This utility model is equipped with a first mixing component and a second mixing component, which can perform two mixing operations on materials. Through the staged mixing mechanism, it takes into account both efficiency and accuracy. The first mixing is carried out by a conical mixer, which uses gravity to reduce power loss and facilitates material discharge. The second mixing is carried out by a cylindrical mixer, which stabilizes the stirring, reduces mechanical load, and extends the equipment life.

[0017] In this invention, the No. 1 mixing component and the No. 2 mixing component are connected by a transfer pipe to facilitate the transfer of materials, so that the staff can observe the uniformity of the materials after one mixing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 yes Figure 1 Enlarged schematic diagram of the No. 1 mixer;

[0020] Figure 3 yes Figure 1 Enlarged schematic diagram of mixer No. 2.

[0021] In the picture:

[0022] 11. No. 1 mixer; 12. Primary mixing shaft; 13. No. 1 mixing seat; 14. No. 1 mixing chamber; 15. No. 1 end cap; 16. No. 1 motor; 17. Primary discharge pipe; 18. Primary feed inlet; 19. Locking sleeve; 21. No. 2 mixer; 22. Secondary mixing shaft; 23. No. 2 mixing seat; 24. No. 2 mixing chamber; 25. No. 2 end cap; 26. No. 2 motor; 27. Secondary feed inlet; 28. Secondary discharge pipe; 31. Transfer pipe; 41. Frustum; 42. Boss. Detailed Implementation

[0023] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] Reference Figures 1-3 According to an embodiment of a secondary mixing device of the present invention, it includes a first mixing component and a second mixing component. The first mixing component includes a first mixer 11, and the second mixing component includes a second mixer 21. The primary discharge pipe 17 at the lower end of the first mixer 11 is connected to the secondary inlet 27 in the second mixer 21 through a transfer pipe 31. After the polyurethane raw liquid is injected into the first mixer 11 and mixed once, it will enter the second mixer 21 through the transfer pipe 31, and then be discharged after secondary stirring, thus realizing the secondary stirring operation.

[0028] Furthermore, in order to improve the mixing effect and efficiency, the first mixer 11 is a conical mixer, that is, the primary stirring shaft 12 inside the first mixer 11 is designed with a diameter that gradually decreases from top to bottom, and the second mixer 21 is a cylindrical mixer, that is, the secondary stirring shaft 22 inside the second mixer 21 is designed with a constant diameter from top to bottom, and multiple arc-shaped flanges with the same lateral extension distance and arranged vertically are provided on the outer curved surfaces of the primary stirring shaft 12 and the secondary stirring shaft 22.

[0029] The specific structures of the No. 1 mixer 11 and the No. 2 mixer 21 are as follows: the No. 1 mixer 11 includes a No. 1 stirring seat 13, and the No. 1 stirring seat 13 is provided with a No. 1 stirring chamber 14 for accommodating the primary stirring shaft 12. The diameter of the No. 1 stirring chamber 14 gradually decreases in the downward direction so that the distance between the arc-shaped flange on the primary stirring shaft 12 and the wall surface of the No. 1 stirring chamber 14 is equal. The No. 1 stirring seat 13 is provided with a No. 1 end cap 15. The No. 1 end cap 15 is equipped with a No. 1 motor 16 connected to the primary stirring shaft 12 and used to drive the primary stirring shaft 12 to rotate. The primary discharge pipe 17 is installed at the lower end of the No. 1 stirring seat 13. The No. 1 end cap 15 is provided with a primary feed port 18.

[0030] The second mixer 21 includes a second mixing seat 23, which has a second mixing chamber 24 for accommodating the secondary mixing shaft 22. The second mixing seat 23 is provided with a second end cap 25, which is equipped with a second motor 26 connected to the secondary mixing shaft 22 and used to drive the secondary mixing shaft 22 to rotate. The secondary feed inlet 27 is located inside the second end cap 25 and opens into the second mixing chamber 24. The lower end of the second mixing seat 23 is equipped with a secondary discharge pipe 28.

[0031] The bottom of the first stirring chamber 14 is narrow, and the diameter of the primary stirring shaft 12 changes, which can enhance the flowability of the material in the central area. The conical mixer is highly compatible with materials with large density differences or large particle size differences.

[0032] The function of the second mixer 21 is to perform fine secondary mixing of the materials and maintain mixing stability.

[0033] Furthermore, the installation method of the primary discharge pipe 17 and the secondary discharge pipe 28 is as follows: the primary discharge pipe 17 is locked to the first stirring seat 13, and the secondary discharge pipe 28 is locked to the second stirring seat 23, respectively, by flanges.

[0034] Furthermore, to facilitate feeding into the No. 1 mixer 11, the No. 1 end cover 15 includes a frustum 41 and a boss 42 integrally formed on the frustum 41. The No. 1 motor 16 is fixed on the boss 42. The upper edge of the outer side of the No. 1 stirring seat 13 is expanded outward to form a No. 1 ring sleeve. A locking sleeve 19 is also provided outside the No. 1 stirring seat 13. The locking sleeve 19 presses the No. 1 ring sleeve upward into the frustum 41. The locking sleeve 19 is fixed to the lower end of the frustum 41 by a No. 1 bolt. The primary feed port 18 is obliquely arranged inside the frustum 41. There are three primary feed ports 18, which are arranged around the axis of the No. 1 end cover 15.

[0035] When it is necessary to disassemble the primary stirring shaft 12 and the primary stirring seat 13 for cleaning, the operator only needs to unscrew the primary bolt to separate the primary stirring seat 13 from the truncated cone 41 and then clean the primary stirring shaft 12 and the primary stirring seat 13.

[0036] The second end cap 25 is cylindrical, and the outer curved surface of the second stirring seat 23 is integrally formed with a second ring sleeve, which is fixed to the lower end of the second end cap 25 by a second bolt.

[0037] Similarly, when it is necessary to clean the second stirring seat 23 and the secondary stirring shaft 22, the operator can unscrew the second bolt and disassemble the second stirring chamber 24 for cleaning.

[0038] In addition, the transfer tube 31 can be made of a transparent material, making it easy for staff to observe the degree of material mixing inside the transfer tube 31.

[0039] The above description is only a specific embodiment of the present utility model, but the technical features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A secondary mixing mixing apparatus comprising a primary mixing assembly and a secondary mixing assembly, characterized in that: The first mixing assembly comprises a first mixer (11), and the second mixing assembly comprises a second mixer (21), a first discharge pipe (17) at the lower end of the first mixer (11) is connected to a second feeding port (27) in the second mixer (21) through a transfer pipe (31); The first mixer (11) is a conical mixer, that is, a first stirring shaft (12) in the first mixer (11) is designed to gradually decrease in diameter from top to bottom, the second mixer (21) is a cylindrical mixer, that is, a second stirring shaft (22) in the second mixer (21) is designed to have a constant diameter from top to bottom, and the outer curved surfaces of the first stirring shaft (12) and the second stirring shaft (22) are both provided with a plurality of arc flanges which have the same transverse extension distance and are arranged in upper and lower rows.

2. A secondary mixing mixing apparatus as claimed in claim 1, characterised in that: The first mixer (11) comprises a first stirring seat (13), the first stirring seat (13) is provided with a first stirring cavity (14) for accommodating the first stirring shaft (12), a first end cover (15) is arranged on the first stirring seat (13), a first motor (16) connected to the first stirring shaft (12) and used for driving the first stirring shaft (12) to rotate is arranged on the first end cover (15), the first discharge pipe (17) is arranged at the lower end of the first stirring seat (13), and a first feeding port (18) is arranged in the first end cover (15); The second mixer (21) comprises a second stirring seat (23), the second stirring seat (23) is provided with a second stirring cavity (24) for accommodating the second stirring shaft (22), a second end cover (25) is arranged on the second stirring seat (23), a second motor (26) connected to the second stirring shaft (22) and used for driving the second stirring shaft (22) to rotate is arranged on the second end cover (25), and the second feeding port (27) is arranged in the second end cover (25) and communicates with the second stirring cavity (24), and a second discharge pipe (28) is arranged at the lower end of the second stirring seat (23).

3. A secondary mixing mixing apparatus as claimed in claim 2, characterised in that: The first discharge pipe (17) and the first stirring seat (13) and the second discharge pipe (28) and the second stirring seat (23) are respectively locked through flanges.

4. A secondary mixing mixing apparatus as claimed in claim 2, wherein: The first end cover (15) comprises a circular table (41) and a boss (42) integrally formed on the circular table (41), the first motor (16) is fixed on the boss (42), the first stirring seat (13) is outwardly expanded at the upper edge of the outer side to form a first ring sleeve, a locking sleeve (19) is further arranged outside the first stirring seat (13), the first ring sleeve is pressed upward in the circular table (41) by the locking sleeve (19), the locking sleeve (19) is fixed to the lower end of the circular table (41) through a first bolt, and the first feeding port (18) is arranged obliquely in the circular table (41).

5. A secondary mixing mixing apparatus as claimed in claim 2, wherein: The second end cover (25) is in a straight cylindrical shape, and a second ring sleeve is integrally formed on the outer curved surface of the second stirring seat (23), and the second ring sleeve is fixed to the lower end of the second end cover (25) through a second bolt.

6. A secondary mixing mixing apparatus as claimed in claim 4, characterised in that: The primary feeding port (18) is provided with three, and around the axis of the first end cover (15) is provided.

7. A secondary mixing mixing apparatus as claimed in claim 2, wherein: The diameter of the first stirring cavity (14) is also gradually reduced in the downward direction, so that the distance between the arc-shaped flange on the primary stirring shaft (12) and the wall of the first stirring cavity (14) is equal.

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