JPS6090033A - Leak free stirrer for high temperature and high pressure use - Google Patents

Abstract

PURPOSE:To obtain a perfect non-leak type leak free stirrer for a high temp. and high pressure use, by using a magnet coupling to realize such a state that the rotary shaft of a motor is connected to the shaft of a stirring blade through a partition plate. CONSTITUTION:An intermediate barrel 12 is provided to the upper part of a stirring tank 1 in a communicated state and a motor chamber 3 is provided to the upper part of the intermediate barrel 2 through a partition plate 4 as well as parmanent magnets 12, 18 are arranged in the motor chamber 3 and the intermediate barrel 2 at predetermined intervals in opposed relationship so as to interpose the partition plate 4 therebetween while the permanent magnet 12 in the motor chamber 3 is attached to the shaft 6 of the motor 5 provided in the motor chamber 3 and the permanent magnet 13 in the intermediate barrel 2 is supported by the upper end of the shaft 14 of the stirring blade 13 supported in the intermediate barrel 2. By this constitution, the shaft 6 of the motor 5 is connected to the shaft 14 of the stirring blade 13 by a magnet coupling. As a result, perfect non-leak operation can be performed and, even if a noxious fluid is used, safety to organism and safety from the aspect of fire prevention are achieved. In addition, public nuisance measure equipment is dispensed with and efficiency is enhanced while energy is conserved.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a leak-free stirrer for high temperature and high pressure that is suitable for use.

If JL bodies can be stirred in a high-temperature, high-pressure stirrer without leakage, (1) there will be no discharge of harmful fluids, which will be advantageous in terms of anti-biotics and fire prevention; (no pollution control equipment will be required; 0 None) There are various advantages such as increased leakage efficiency and energy savings.

Therefore, various types of leak-free stirrers for high temperature and high pressure have been proposed. Fig. 1 shows a typical example, in which an intermediate cylinder b is placed above the stirring 4gja, and the shaft d of the motor C installed on the intermediate cylinder b and the stirring shaft C are connected to each other within the intermediate cylinder b. It is integrally connected by a ring f, and is equipped with a gland packing, mechanical seal, etc. around the stirring shaft C, and furthermore, a seal box g is provided on the outer periphery, and a sealing agent is supplied through a nozzle pipe h, thereby forming a stirring tank. A is sealed. Note that i is a stirring blade.

However, such conventional high-temperature, high-pressure leak-free Il! l!
The agitator requires a sealant and a sealant supply device, which is economically disadvantageous, and although the sealant is supplied at a pressure higher than the internal pressure of the stirring tank a, it is not completely sealed. Therefore, it was not possible to achieve complete leakage. Therefore, it was considered to make the intermediate shell a sealed type, but in that case, the same gas as in the stirring tank a would have to be used as a sealant, and the shaft of the motor C would also have to be used as a sealant. Seal against d is an important issue.

The present invention has been made to solve all of the problems described in i)'+3 and to provide a leak-free stirrer for high temperature and high pressure that is completely leak-free.

As shown in FIGS. 2 and 3, the top of the stirring tank 1
The intermediate cylinders 2 are arranged in series, a motor chamber 3 is placed on the upper part of the intermediate cylinder 2, and a partition plate 4 of a thin plate structure made of a non-magnetic material is provided between the motor chamber 3 and the intermediate cylinder 2. The agitator 4f9], the intermediate cylinder 2, and the motor chamber 3 are each formed into a sealed structure by integrally tightening and fixing both of them.

A motor 5 is installed facing downward in the motor chamber 3, and a transmission shaft 8 connected to a shaft 6 of the motor 5 via a coupling 7 is connected to a transmission shaft 8.
A disk-shaped permanent grinding stone 12 held by bolts 11 etc. between the base plate 9 and the presser plate 10 is attached to the partition plate 4
Install it by forming the required clearance between the
Inside the intermediate shell 2, a stirring shaft 14 is provided with stirring blades 13 at the lower end.
, and a base plate 15 is placed on the upper end of the stirring shaft 14.
A disk-shaped permanent magnet 18 held by bolts 17 or the like between the holding plate 16 and the holding plate 16 is attached with a required clearance formed between it and the partition plate 4 in the same manner as the permanent magnet 12.

Thus, the permanent magnets 12 and 18 are placed opposite to each other with the partition plate 4 in between.

Further, a lubrication-free bearing box 21 having a thrust bearing 19 and a radial bearing 20 made of a permanent magnet, ceramic, Teflon, etc. is mounted on the upper part of the stirring shaft 14, and the lubrication-free bearing box 21 is attached to the intermediate cylinder 2. Fixed to the inner wall
The load of the stirring shaft 14 is supported. At the boundary between the intermediate barrel 2 of the stirring shaft 14 and the stirring tank 1, there is a non-lubricated bearing having a radial bearing 22 similar to the radial bearing 20 of the non-lubricated bearing box 21 at the upper part and a labyrinth 23 at the lower end. The box 24 is attached and fixed to the inner wall of the intermediate cylinder 2, and a heat insulating material 25 is provided around the outer periphery of the non-lubricated bearing box 24. The water cooling coil 27 of the introduced cooling water pipe 26 and the water cooling jacket 27' are respectively arranged around the outer periphery of the intermediate body 2 at that position.

Furthermore, pipes 28 and 29 are provided which communicate with the inside of the motor chamber 3 and the inside of the intermediate shell 2, respectively, and a differential pressure gauge 30 is provided at the confluence of the two city pipes 28 and 29, and the pressure is opened and closed by a signal from the differential pressure gauge 30. a Put the regulating valve 31 on the piping 28,
The structure is such that the pressure in the motor chamber 3 and the pressure in the intermediate shell z can be controlled to be equal pressures.

In this configuration, the shaft 6 of the motor 5 and the stirring shaft 14 are connected by a so-called magnetic coupling using permanent magnets 12,18. Therefore, when the shaft 6 of the motor 5 is driven, the permanent grinding stone 12 is rotated via the coupling 7 and the transmission shaft 8, the permanent magnet 18 is rotated by attraction or repulsion, and the stirring shaft 14 is rotated. J! by the stirring blade 13! 5! Work inside the stirring tank 1 and the tank 1 is performed.

In the case of +iiJ, the motor chamber 3 and the intermediate cylinder 2 are separated by the partition plate 4, so that the stirring tank 1 and the intermediate cylinder 2 are completely leak-free. Further, the inside of the stirring tank 1 and the inside of the intermediate cylinder 2 are at the same pressure via a labyrinth 23, and the inside of the intermediate cylinder 2 and the inside of the motor chamber 3 are controlled by a regulating valve 31 by No. 18 from a differential pressure gauge 30. Therefore, the inside of the stirring tank 1, the inside of the intermediate shell 2, and the inside of the motor chamber 3 are operated under the same pressure (equal pressure) condition. Furthermore, a heat insulating material 25, a water cooling coil 27, and a water cooling jacket 27 are provided inside and outside the boundary between the stirring tank 1 and the intermediate shell 2, so that the inside of the intermediate shell 2 does not become high temperature, and the permanent magnet 12. There is no risk of any negative impact on the 18th.

It should be noted that the present invention is not limited to the first embodiment; for example, the permanent magnets 12 and 18 may have a double cylindrical structure, and the bearings 19 and 20.

22 has both ball and plain type permanent magnets and 16i
(It goes without saying that a dry film treatment to increase abrasion resistance or the like may be employed, and other various changes may be made without departing from the gist of the invention.

As explained above, according to the leak-free stirrer for high temperature and high pressure of the present invention, (1) Complete leak-free operation can be performed by employing magnetic coupling.

(It) Safe for biological and fire protection even when using hazardous fluids.

01(l) No need for pollution control equipment.

0 efficiency, energy saving can be achieved.

■ Easy maintenance-free.

(V [l 7M degree, pressure collar corrosive environment, scale, low noise, etc.) can be fully accommodated.

(To) It is highly effective for drive motors and other parts because it can alleviate the impact.

It can produce excellent effects such as

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a conventional example, FIG. 2 is a schematic diagram of a leak-free stirrer for high temperature and high pressure according to the present invention, and FIG. 3 is a detailed diagram of the main part of FIG. 2. 1 is a stirring tank, 2 is an intermediate barrel, 3 is a motor chamber, 4 is a corner plate, 5
is a motor, 6 is a shaft, 12.18 is a permanent magnet, 14 is a stirring shaft, 21.24 is a non-lubricated bearing box, 27 is a water cooling jacket, 30 is a differential pressure gauge, and 31 is a pressure regulating valve.

Claims (1)

[Claims] 1) Pl, an intermediate cylinder is connected to the upper part of the hammer, one part of the intermediate cylinder is recessed, a motor chamber is provided through a plate, and a partition plate mj is sandwiched between the motor chamber and the intermediate cylinder. Permanent magnets are arranged facing each other at a required interval, the permanent magnet in the motor chamber is attached to the motor installed in the motor chamber, and the permanent magnet in the intermediate cylinder is supported by the upper end of the shaft of the stirring blade supported in the intermediate cylinder. #'jffj is a leak-free stirrer for high temperature and high pressure.