JPH10103870A - Vessel-rotating type mixing and drying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce abrasion powder, generated by sliding on a suction pipe, extremely and reduce the abrasion powder, invading a vessel main body through the suction pipe, remarkably by employing a mechanical seal for a sealing means between the suction pipe and a retaining member. SOLUTION: A dry mechanical seal 21 is employed as a seal means between a suction pipe 12 and a retaining member 17. According to this method, abrasion powder, generated by sliding on the suction pipe 12, is reduced extremely and the amount of abrasion powder, invading a vessel main body 1 through the suction pipe 12, is reduced remarkably. Accordingly, the mixing and drying machine becomes optimum for mixing and drying of medical, food stuff and electronic material or the like, which is easily affected by the inclusion of impurities especially. On the other hand, the amount of heat, generated in the dry mechanical seal 21, is small and the dry mechanical seal 21 is arranged at a site apart from the vessel main body 1 whereby the transfer of heat, generated by sliding, to a vessel main body can be avoided nicely while the deterioration of products in the vessel main body 1 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary container type mixing / drying machine which is most suitable for mixing and drying various kinds of powders, particularly powders such as medicines, foods, electronic materials, etc. which are resistant to impurities.

[0002]

2. Description of the Related Art Conventionally, as this type of container rotary type mixing / drying machine, for example, there is one as shown in FIG.

That is, in this conventional apparatus, a suction tube 12a having one end inserted into a container body 1a is rotated together with the container body 1a by a driving means, and a support member 17a for supporting the other end side of the suction tube 12a. Is provided with an oil seal 31 to seal between the two.

Then, for example, the container main body is connected to the suction pipe 12a.
The inside of 1a is evacuated to mix and dry the powders and granules charged into the container body 1a.

[0005]

However, in the above-mentioned conventional mixer / dryer, the suction pipe 12a has an oil seal.
The oil seal 31 is liable to wear due to the rotation while sliding with the base 31, and there is a disadvantage that the abrasion powder generated at that time enters the container body 1a through the suction pipe 12a. If abrasion powder is mixed into the powder, the powder will be contaminated and the product value will be reduced.
This has been a problem for food, electronic materials, and the like.

Further, the oil seal 31 generates heat by sliding with the suction pipe 12a, but the heat is transmitted to the container body 1a through the suction pipe 12a, thereby deteriorating the product. was there.

Further, the oil seal 31 is disadvantageous in that it is greatly restricted by operating conditions such as temperature and pressure.
The sealing means of this type of mixing dryer is not always optimal.

A sheath tube 27a into which a thermometer or the like is inserted may be inserted into the suction tube 12a with one end of the sheath tube 27a protruding into the container body 27a. Tube 12
Since it does not rotate together with a, the sliding portion 32 also exists between the sheath tube 27a and the suction tube 12a. In this case, the same problem as in the case of the oil seal 31 occurs.

SUMMARY OF THE INVENTION Therefore, the present invention has been made to solve the above-mentioned conventional problems, and does not affect the powder and granules in the container body to be mixed and dried. An object of the present invention is to ensure that the seal can be performed.

[0010]

That is, a means adopted by the present invention to solve the above-mentioned problem is that the suction tube 12 having one end inserted into the container body 1 is driven to rotate together with the container body 1. In the container rotating type mixing and drying machine, a mechanical seal is provided on a support member 17 which rotatably supports the other end of the suction pipe 12.
21 in that it serves as a sealing means between the inner peripheral surface of the support member 17 and the outer peripheral surface of the suction tube 12.

Therefore, in a container rotary type mixing / drying machine characterized by the above-mentioned features of the present invention, for example, after powder or granules such as medicines and foods are put into the container main body 1, the container main body 1 is sucked by the suction pipe 12. In a vacuum state, the powder is rotated to mix and dry the powder.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a container rotating type mixing and drying machine according to the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a cone-shaped container main body, which has an inlet (not shown) in which a lid 2 is provided so as to be openable and closable at an upper end, and a lower end. Has a discharge port (not shown) provided with a butterfly valve 3.
At the center of each side surface of the container body 1, a shaft-like body 4 is horizontally projected. 5 is a base on which mounting bases 6 are erected on the left and right,
The shaft member 4 is fixed by a bearing member 7 fixed to an upper end of a mounting base 6.
Is rotatably supported.

Reference numeral 8 denotes a motor for rotating the container body 1. The container body 1 is rotationally driven via the one shaft 4 provided with the sprocket 9, the chain 10, and the sprocket 11 provided on the motor 8. You.

Reference numeral 12 denotes a suction tube which is inserted into the other shaft-shaped body 4 and one end of which is inserted into a mounting hole 13 formed in the container body 1.
A filter 14 is attached to this one end, and a flange 15 provided at an intermediate portion is fixed to an end surface of the one shaft-like body 4 by a bolt 16.

Reference numeral 17 denotes a support member for rotatably externally supporting the other end of the suction tube 12. The support member 17 is fixed to the rear mounting table 6 by a mounting plate 18 and a detent 19. .
Reference numeral 20 denotes a bearing housed in the support member 17, reference numeral 21 denotes a so-called dry mechanical seal as sealing means provided outside the bearing 20 and housed in the support member 17, and the dry mechanical seal 21 is a lubricating oil. And a cooling member which does not require cooling water. As shown in FIG. 3, a ceramic ring 22 having an outer peripheral surface in contact with an inner peripheral surface of the support member 17;
A seal ring 23 made of fluororesin, which is disposed on the front side of 22 and rotates together with the suction pipe 12;
A collar 35 is pressed against the ceramic ring 22 via a spring 33 and the ceramic ring 22. The ceramic ring 22 and the seal ring 23 are slidably in contact with each other.

Reference numeral 24 denotes a connection pipe which is connected to the suction pipe 12 and has one end fixed to an end face of the support member 17 by a bolt 25 and has a suction port 26 on a side face.

Reference numeral 27 denotes a sheath tube used for inserting a thermometer and humidifying the inside of the container body 1. The sheath tube is fixed to one end of the suction tube 12 and slides inside the container body 1. I have lost motion. Further, the other end side of the sheath tube 27 is supported by a flange member 28 as a holding member fixed to the other end of the connection tube 24, and between the flange member 28 and the sheath tube 27 is the same as described above. A dry mechanical seal 29 is interposed as a seal member, and a rotary joint 30 is attached to the other end of the sheath tube 27.

The present embodiment has the above configuration.
Next, an example of its use will be described.

First, after the powdery material to be mixed and dried is introduced from the inlet of the container body 1, the motor 8 is started while the gas in the container body 1 is sucked from the suction port 26 of the connecting pipe 24 to make a vacuum state. Then, the container body 1 is rotationally driven. As a result, the powder and granules in the container body 1 are mixed and dried, and after the work is completed, the butterfly valve 3 is opened and the container body 1 is opened.
The product, the powder, is discharged from the outlet.

In this case, the suction tube 12 and the support member 17
Since the dry mechanical seal 21 is used as a sealing means between the suction pipe 12 and the suction pipe 12, the amount of wear powder generated by sliding with the suction pipe 12 is extremely small, and the amount of wear powder entering the container body 1 via the suction pipe 12 is greatly reduced. Will be reduced. Therefore, it is particularly suitable for mixing and drying medicines, foods, electronic materials, and the like that do not like inclusion of impurities.

Further, the amount of heat generated in the dry mechanical seal 21 serving as the sliding portion is small, and the dry mechanical seal 21 is disposed at a position separated from the container body 1, so that the heat generated by the sliding can be reduced. 1 can be satisfactorily avoided. Therefore, there is no possibility that the product in the container main body 1 is deteriorated by the heat generation, and a wide range of applicable powders can be secured.

Further, the sheath tube 27 is connected to the container body 1 and the suction tube 12.
The dry mechanical seal 29, which has no sliding portion in the container body 1 and is located at a position away from the container body 1 as in the case of the suction tube 12, is provided with the sheath tube 27 and the flange member 28. Since the sheath tube 27 serves as a sealing means therebetween, the same operation and effect as described above can be obtained in the sheath tube 27 as well.

Since the dry mechanical seals 21 and 29 have excellent pressure resistance and heat resistance, they can cope with so-called steam sterilization performed under high pressure and high temperature conditions, and also have excellent corrosion resistance. Therefore, there is an advantage that the generation of corrosion due to a solvent or the like can be suppressed, and long-term use is possible.

Although the container rotary mixing / drying machine in the above-described embodiment has the sheath tube 27, such a sheath tube 27 is not necessarily provided, and may be provided as needed.

In the above embodiment, the suction tube 12
Although the dry mechanical seal 21 is used as a seal means between the support member 17 and the seal member, such a seal means is not limited to this, and a general mechanical seal called a double mechanical seal or a single mechanical seal is used. It does not matter. In short, any mechanical seal that does not use lubricating oil or cooling water for the seal portion may be used.

Further, the seal member between the sheath tube 27 and the holding member 28 may be changed to a general mechanical seal or gland packing.

In addition, the shape of the container body 1 and the configuration of each part such as the rotation driving means can be freely changed within the intended range of the present invention.

[0029]

As described above, the present invention uses a mechanical seal as a sealing means between the suction pipe and the support member. The amount of abrasion powder generated by the sliding of the abrasion becomes extremely small, and the abrasion powder entering the container body via the suction pipe is greatly reduced. Therefore, it is particularly suitable for mixing and drying medicines, foods, electronic materials, and the like that do not like the contamination of impurities.

Further, the amount of heat generated in the mechanical seal serving as a sliding portion with the suction pipe is small, and the dry mechanical seal is disposed at a position separated from the container body. Can be satisfactorily avoided. Therefore, there is no possibility of deteriorating the product in the container body, and an effect that a wide range of applicable granular materials can be secured can be obtained.

Further, since the sheath tube is rotated together with the container body and the suction tube, there is no sliding portion in the container body 1 and, similarly to the case of the suction tube, a mechanical member disposed at a position separated from the container body. By using a seal or the like as a seal member between the sheath tube and the flange member, the same effect as that of the above-described suction tube can be obtained in such a sheath tube.

When a dry mechanical seal is particularly used as a sealing means between the suction pipe and the support member or a seal member between the sheath pipe and the holding member, such a dry mechanical seal is excellent in pressure resistance and heat resistance. , High pressure,
It is possible to cope with so-called steam sterilization performed under high-temperature conditions, and since it has excellent corrosion resistance, it is possible to suppress the occurrence of corrosion due to a solvent or the like, and it is possible to use for a long time.

Further, as described above, since the entire structure of the container rotary mixing / drying machine according to the present invention is extremely simple, there is also a practical effect that it can be manufactured easily and inexpensively.

[Brief description of the drawings]

FIG. 1 is a front view of a container rotating type mixing and drying machine showing an embodiment of the present invention.

FIG. 2 is an enlarged front view of a main part including a cross section of the same part.

FIG. 3 is an enlarged sectional view of a main part of the dry mechanical seal.

FIG. 4 is an enlarged front view including a partial cross section of a container rotating type mixing and drying machine showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Container body 12 ... Suction tube 17 ... Support member 21 ... Mechanical seal 24 ... Connection tube 27 ... Sheath tube 28 ... Holding member 29 ... Seal member 30 ... Rotary joint

Claims (5)

[Claims] 1. A container rotating type mixing and drying machine in which one end of a suction tube (12) inserted into a container body (1) is driven to rotate together with the container body (1). A mechanical seal (21) is provided inside a support member (17) rotatably supporting the other end of the suction pipe (12), and sealing means is provided between an inner peripheral surface of the support member (17) and an outer peripheral surface of the suction pipe (12). A container rotating type mixing / drying machine, characterized in that: 2. The container-type mixing and drying machine according to claim 1, wherein said mechanical seal is a dry mechanical seal. 3. A connection pipe (24) communicating with the suction pipe (12) is provided on the support member (17), and one end of the connection pipe (24) and the suction pipe (12) is connected to the container body. (1) A sheath member (27) that is rotated inside the suction tube (12) so as to be inserted therein, and the other end of the sheath tube (27) is provided on the connection tube (24).
The seal member (29) is rotatably supported by the (28), and a seal member (29) is provided between an inner peripheral surface of the holding member (28) and an outer peripheral surface of the sheath tube (27). 3. The container rotary mixing / drying machine according to 2. 4. A rotary drier according to claim 3, wherein a rotary joint (30) is provided at the other end of said sheath tube (27). 5. The rotary drier according to claim 3, wherein the seal member is a dry mechanical seal or a gland packing.