Stirring and mixing equipment

Abstract

To provide a stirring mixer which can stir and mix different materials easily and uniformly with a simple structure.SOLUTION: A stirring mixer includes: a stirring plate F attached to a shaft part 2 which moves in a reciprocating manner; a casing 1 which houses the shaft part 2 and the stirring plate F; and a material introduction pipe connected to the casing 1. A portion which is open in the casing of the material introduction pipe is a double pipe having an outer pipe P1 and an inner pipe P2. A first material M1 is introduced into the casing by a first passage formed between the outer pipe P1 and the inner pipe P2, and a second material M2 is introduced into the casing by a second passage formed in the inner pipe P2.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a stirring and mixing device for mixing a plurality of materials. [Background technology]

[0002] Conventionally, as shown in Patent Documents 1 to 3, there have been proposed stirring and mixing devices for mixing multiple materials, in which a stirring plate is attached to a shaft and the stirring plate is reciprocated in the axial direction to mix the materials in a container.

[0003] In Patent Document 1, different materials are separately supplied into a container and stirred and mixed with a stirring plate. Figure 1 shows a simplified version of such a stirring and mixing device, in which a stirring plate F attached to a shaft 2 is placed in a container 1, and the stirring plate F is reciprocated in the vertical direction indicated by the arrow A by a driving means 20.

[0004] A first material M1 and a second material M2 are supplied into the vessel from different positions in the vessel 1, and the materials M1 and M2 move upward in the vessel 1 while being stirred, and the mixture MX is discharged from the outlet. The stirring plate F in Fig. 1 is an oblique flat plate F1 as shown in Fig. 3(a) or a spiral plate F2 as shown in Fig. 3(b), and when the stirring plate (F1 or F2) reciprocates in the direction of the arrow A, the second material M2 supplied from the middle of the vessel 1, or the second material M2 located at the position shown in the figure, is likely to reciprocate in the direction of the arrow B along the surface of the stirring plate as shown in Fig. 3.

[0005] For this reason, as shown in FIG. 4, when the inside of the container is viewed from above the axis 2, the second material M2 supplied from the pipe P2 is present in a high density in the area C, and a long stirring and mixing operation is required for the second material M2 to be sufficiently dispersed throughout. For example, when a chemical reaction occurs by mixing the first material M1 and the second material M2, such as when a reaction liquid is used as the first material M1 and an additive is used as the second material M2, if the ratio (density) of the second material M2 to the first material M1 in the mixture is different, the properties of the resulting mixture will also be different, causing quality variations in the mixture MX discharged from the stirring and mixing device. This condition is particularly noticeable when the speed of this chemical reaction is fast.

[0006] As in Patent Documents 1 and 3, the stirring and mixing effect can be enhanced by providing a partition plate fixed to the container side between the stirring plates inside the container, or by using a stirring plate F with a through hole h as shown in Figure 5 as in Patent Document 3. However, a long stirring and mixing operation is still required to sufficiently diffuse the second material M2.

[0007] On the other hand, as a method for shortening the time required to stir and mix different materials, there is a method in which the different materials are mixed in advance and then supplied to the stirring and mixing device, as shown in Patent Document 2. As shown in Fig. 2, a first material M1 and a second material M2 are premixed by a member indicated by reference numeral 3, and the premixed materials are supplied to a stirring and mixing device in which a stirring plate F reciprocates. In the case of Fig. 2, it is necessary to provide a separate premixing device, which not only increases the cost of the entire device, but also increases the size of the entire device. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2004-230272 A [Patent Document 2] JP 2007-105590 A [Patent Document 3] JP 2009-262013 A Summary of the Invention [Problem to be solved by the invention]

[0009] An object of the present invention is to provide a stirring and mixing device that solves the above-mentioned problems and is capable of easily and uniformly stirring and mixing different materials with a simple configuration. [Means for solving the problem]

[0010] In order to achieve the above object, the stirring and mixing device according to the present invention has the following technical features. (1) shaft Attached to the Consists of flat or spiral plates A stirring plate; A driving means for reciprocating the shaft portion in a longitudinal direction of the shaft portion; The mixing device is provided with a casing that houses the shaft portion and the stirring plate, and a material introduction pipe that is connected to the casing in a direction perpendicular to the direction of the reciprocating motion. The stirring plate that reciprocates near the portion of the material introduction pipe that opens into the casing is inclined at least with respect to the shaft portion. With a plate surface the portion of the material introduction pipe that opens into the casing is a double pipe having an outer pipe and an inner pipe, a first material is introduced into the casing through a first flow path formed between the outer pipe and the inner pipe, and a second material is introduced into the casing through a second flow path formed inside the inner pipe, the outer pipe does not protrude into the casing, and the inner pipe is recessed inside the outer pipe within a range of 5 mm or less from the inner surface of the casing.

[0011] (2) In the stirring and mixing apparatus described in (1) above, the portion of the material introduction pipe opening into the casing is characterized in that it has another inner pipe arranged alongside the inner pipe within the outer pipe constituting the double pipe, and a third material is introduced into the casing through a third flow path formed by the other inner pipe. Effect of the Invention

[0012] According to the present invention ,shaft Attached to the Consists of flat or spiral plates A stirring plate; A driving means for reciprocating the shaft portion in a longitudinal direction of the shaft portion;The mixing device is provided with a casing that houses the shaft portion and the stirring plate, and a material introduction pipe that is connected to the casing in a direction perpendicular to the direction of the reciprocating motion. The stirring plate that reciprocates near the portion of the material introduction pipe that opens into the casing is inclined at least with respect to the shaft portion. With a plate surface The portion of the material introduction pipe that opens into the casing is a double pipe having an outer pipe and an inner pipe, and is configured to introduce a first material into the casing through a first flow path formed between the outer pipe and the inner pipe, and to introduce a second material into the casing through a second flow path formed inside the inner pipe, and the outer pipe does not protrude into the casing, and the inner pipe is retracted inside the outer pipe by a distance of 5 mm or less from the inner surface of the casing.As a result, the first material M1 and the second material M2 can be simultaneously introduced into nearby locations inside the casing, and it is possible to provide a stirring and mixing apparatus that is capable of easily and uniformly stirring and mixing different materials with a simple configuration. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a schematic diagram of a conventional stirring and mixing device. [Diagram 2] FIG. 1 is a schematic diagram of another conventional stirring and mixing device. [Diagram 3] FIG. 1 shows examples of stirring plates: (a) an inclined flat plate; (b) a spiral plate. [Figure 4] FIG. 13 is a diagram showing the spread of a second material M2 in a container. [Diagram 5] FIG. 13 is a diagram showing an example of a stirring plate having a large number of through holes. [Figure 6] FIG. 1 is a diagram showing an example of a stirring and mixing device according to the present invention. [Figure 7] 7 is a diagram for explaining the state of an opening of the material introduction pipe in FIG. 6. FIG. [Figure 8] FIG. 7 is a diagram for explaining an application example of a double pipe used in the stirring and mixing apparatus of FIG. 6. [Figure 9] FIG. 7 is a diagram showing another example of a double pipe used in the stirring and mixing apparatus of FIG. [Figure 10]FIG. 13 shows an example of a material introduction pipe supplying three or more different materials. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] The stirring and mixing device according to the present invention will be described below with reference to the drawings. Fig. 6 is a diagram showing a configuration example of a stirring and mixing device according to one embodiment of the present invention, and Fig. 7 is a diagram showing the shape of the opening of the material introduction pipe used in Fig. 6. As shown in Figures 6 and 7, the stirring and mixing apparatus of the present invention comprises a stirring plate F attached to a reciprocating shaft portion 2, a casing 1 that houses the shaft portion 2 and the stirring plate F, and a material introduction pipe connected to the casing 1, and the portion of the material introduction pipe that opens into the casing is a double pipe having an outer pipe P1 and an inner pipe P2, and a first material M1 is introduced into the casing through a first flow path formed between the outer pipe P1 and the inner pipe P2, and a second material M2 is introduced into the casing through a second flow path formed inside the inner pipe P2.

[0015] For the parts other than the material introduction pipe used in the stirring and mixing apparatus of the present invention, the structure of a conventional stirring and mixing apparatus shown in Patent Documents 1 to 3, for example, can be adopted. For the stirring plate F attached to the reciprocating shaft portion 2, an inclined flat plate (FIG. 3(a)) or a spiral plate (FIG. 3(b)) as shown in FIG. 3, or a flat plate perpendicular to the shaft portion 2, can be used. In addition, the stirring plate F can be provided with a through hole h as shown in FIG. 5. Furthermore, it is also possible to provide a partition plate fixed to the inner surface of the casing. Reference numeral 20 in FIG. 6 denotes a driving means for reciprocating the shaft portion 2, as described above.

[0016] In a stirring and mixing method in which the stirring plate F is reciprocated in the axial direction, as in the stirring and mixing apparatus to which the present invention is applied, the material is less likely to be dispersed throughout and uneven mixing is more likely to occur, compared to a stirring and mixing method in which the stirring plate (or stirring blade) is rotated around the axis. Although it depends on the properties of the materials to be mixed, such as the viscosity, the larger the inner diameter of the casing 1, the more likely uneven mixing is to occur. For this reason, when using a stirring and mixing apparatus with a casing 1 having a large inner diameter, it is necessary to change the method of introducing the materials into the stirring and mixing apparatus, as described below.

[0017] In the stirring and mixing device of the present invention, the material introduction pipe is configured as a double pipe consisting of an outer pipe P1 and an inner pipe P2. By adopting this double pipe, the places where different materials are supplied into the casing 1 can be arranged at the same position in the casing 1. Moreover, the different materials supplied through the double pipe can be instantly stirred and mixed by the stirring plate F that reciprocates near the opening of the material introduction pipe (double pipe), which makes it possible to eliminate problems such as uneven mixing due to different materials. Furthermore, it is more preferable to incline the stirring plate F with respect to the shaft 2 at least near the opening of the material inlet pipe, since this makes it possible to widely diffuse the materials to be mixed not only in the vertical direction (direction parallel to the shaft) but also in the horizontal direction (direction perpendicular to the shaft).

[0018] In Fig. 6, the opening of the material introduction pipe is arranged such that the casing side ends of the outer pipe P1 and the inner pipe P2 are positioned along the side wall of the casing 1. Taking into consideration the viscosity (fluidity) of the materials to be mixed, the supply amount, ease of mixing, etc., it is possible to adopt a state in which the casing side end of the material introduction pipe is such that the inner pipe P2 protrudes further into the casing than the outer pipe P1 (protrusion amount d) (see Fig. 8(a)), or the inner pipe P2 is retracted from the casing further than the outer pipe P1 (amount of recession from the end of the outer pipe d') (see Fig. 8(b)), as shown in Fig. 8. It is also possible to protrude the outer pipe P1 into the casing as necessary.

[0019] When the entire or part of the material introduction pipe is protruded into the casing 1, the material moves violently inside the casing due to the reciprocating motion of the stirring plate, so pressure and vibration are applied to the open end of the material introduction pipe. For this reason, it is essential to increase the mechanical strength of the protruding pipe itself as well as its fixing strength to the casing 1. For example, considering the gap between the stirring plate and the inner surface of the casing, it is preferable to set the protrusion amount d in Figure 8(a) and the protrusion amount of the outer pipe P1 to 2 mm or less. Also, it is preferable to set the retraction amount d' of the inner pipe P2 to 5 mm or less as shown in Figure 8(b).

[0020] In FIG. 9, the material introduction pipe has a double-pipe structure at the portion that opens into the casing, but on the opposite side of the inner pipe P2 from the casing, it penetrates the wall of the outer pipe P1 and is led out to the outside of the outer pipe P1. The double-pipe structure requires a structure that maintains the positional relationship between the inner pipe and the outer pipe. For example, it is possible to separately place a support member between the outer pipe and the inner pipe to connect them, but this may hinder the movement of the material moving outside the inner pipe. For this reason, the structure shown in FIG. 9 is a more preferable structure, not only because it increases the fixing strength of the inner pipe P2, but also because it does not require the placement of a support member to support the inner pipe.

[0021] As an application example of the material introduction pipe used in the stirring and mixing device of the present invention, when mixing three or more different materials, it is possible to adopt an arrangement shape of the material introduction pipe as shown in Fig. 10. Fig. 10(a) shows a multiple pipes arranged concentrically, for example, a third pipe P3 further surrounding the double pipe, and a third material M3 is introduced into the casing through a third flow path formed by the third pipe.

[0022] Also, Figure 10(b) shows multiple inner tubes arranged inside an outer tube. For example, an outer tube P1 constituting a double pipe has another inner tube P3 arranged alongside an inner tube P2, and a third material M3 is introduced into the casing through a third flow path formed by the other inner tube. As an application of these, FIGS. 10(a) and (b) may be combined, and the inner tube P2 in FIG. 10(a) may be configured with a plurality of inner tubes as in FIG. 10(b).

[0023] The stirring and mixing device equipped with a double pipe as in the present invention can be suitably used for stirring and mixing when the viscosity of the first material M1 supplied between the outer pipe P1 and the inner pipe P2 is significantly different from the viscosity of the second material M2 supplied to the inner pipe P2, for example. This allows the two to be mixed more smoothly.

[0024] Furthermore, if there is a large difference in the supply amounts of the materials to be mixed, it becomes difficult to mix the two uniformly; however, by using the stirring and mixing device of the present invention to supply the first material M1, which is supplied in larger amounts, to the outer tube side and the second material M2, which is supplied in smaller amounts, to the inner tube side, the two can be supplied continuously while always maintaining a constant ratio, and since the materials are stirred and mixed immediately after entering the casing, it becomes possible to stir and mix the materials in the casing uniformly in a shorter time.

[0025] Furthermore, the stirring and mixing device equipped with the double pipe of the present invention can be used effectively when mixing materials that cause a chemical reaction when mixed, such as a reaction liquid and an additive. The reaction liquid and additives supplied through the double pipe can be instantly mixed by the stirring plate, and the properties of the mixture inside the casing can be maintained uniformly overall. [Industrial Applicability]

[0026] As described above, it is possible to provide a stirring and mixing device that is capable of easily and uniformly stirring and mixing different materials with a simple configuration. [Explanation of symbols]

[0027] 1 Casing 2 Shaft section 20 Driving Means F Stirring plate P1 outer tube (Figures 6~9) P2 Inner pipe (Figs. 6-9)

Claims

1. A stirring plate consisting of a flat plate or a spiral plate attached to a shaft portion, A driving means for reciprocating the shaft portion in a longitudinal direction of the shaft portion; a casing that accommodates the shaft portion and the stirring plate; a material introduction pipe connected to the casing in a direction perpendicular to the direction of the reciprocating motion; The stirring plate reciprocating in the vicinity of the portion of the material introduction pipe that opens into the casing has a plate surface that is inclined with respect to at least the shaft portion, a portion of the material introduction pipe that opens into the casing is a double pipe having an outer pipe and an inner pipe, and is configured to introduce a first material into the casing through a first flow path formed between the outer pipe and the inner pipe, and to introduce a second material into the casing through a second flow path formed inside the inner pipe; The stirring and mixing device is characterized in that said outer tube does not protrude into said casing, and said inner tube is retracted inside said outer tube within a range of 5 mm or less from the inner surface of said casing.

2. The stirring and mixing apparatus according to claim 1, The portion of the material introduction pipe that opens into the casing is provided with another inner pipe alongside the inner pipe within the outer pipe that constitutes the double pipe, and a third material is introduced into the casing through a third flow path formed by the other inner pipe.

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