JPS6141402Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a motor with an airtight joint in which an airtight joint for sealing the opening of an airtight container used in various chemical experiments and a stirring motor are formed integrally or attachably.

When conducting chemical experiments, flammable and corrosive chemicals are often mixed and stirred under low and high pressure environments. Using a general electric motor as a drive source in such an environment has many problems from the standpoint of ensuring experimental safety, such as ignition, corrosion, and explosion. For this purpose, for example, as shown in FIG. 5, an electric motor (not shown) is placed at a location away from the airtight container, and an airtight stopper 3 is fitted into the opening 22 of an airtight container 21 such as a flask via a belt 31.
A shaft 32 is supported in a through hole 35 provided in the shaft 32, and by rotating a pulley 33 mounted on the upper part of the shaft 32, a stirring blade (not shown) mounted on the lower end of the shaft 32 is used to mix chemicals. Mixing and stirring. By locating the motor away from the airtight container, flammable gas is prevented from exploding due to sparks from the motor. Further, sealing between the airtight plug 34 and the shaft 32 is achieved by a seal ring 36 installed in the through hole 35.
The sealing performance of the seal ring 36 and the shaft 32 deteriorated in a short period of time due to friction caused by the rotation of the shaft, resulting in a lack of airtightness.

Furthermore, if the seal and shaft are pressed together too tightly, friction in that area causes torque loss and heat generation. Moreover, all conventional motors of this type are separate from the airtight joint that seals the opening of the airtight container, so it is extremely time-consuming to support the motor with a motor support stand.
It required many adjustments and had extremely troublesome drawbacks.

In view of these conventional drawbacks, the present invention facilitates handling by integrating the motor and an airtight joint that seals the opening of the airtight container, and also isolates the excitation stator from the rotor, which is the rotating part. This protects the excitation stator from the effects of chemicals, and consists of an annular groove provided on the outer periphery of the airtight joint 5 which is inserted and fitted into the opening 22 of the airtight container 21 containing the mixture. A seal gasket 11 for sealing between the opening and the airtight joint 5 is installed inside the airtight joint 5, and a large diameter rotor 13 is installed in the upper part of the through hole 12 provided in the vertical direction at the center of the airtight joint 5. rotatably supports a mounting shaft 14 having a
Mounting shaft 1 protrudes below this airtight joint 5
A chuck 15 holding a shaft 17 having a stirring blade is attached to the lower end of the rotor 4, and an excitation stator 12 isolated from the rotor 13 is attached to the upper part of the hermetic joint 5.
The motor body 1 is equipped with a built-in motor body 1, either integrally or attachably.

An embodiment of the present invention will be described with reference to the drawings. An annular excitation stator 2 is molded with resin, or a non-magnetic metal or plastic is inserted from below into the center of a metal motor body 1 housing the core. A storage chamber 3 made of aluminum is formed inside, and a threaded groove 4 for connection is formed in the lower part of this storage chamber 3. Reference numeral 5 denotes an airtight joint made of a flexible material such as hard rubber or synthetic resin, which is detachably inserted into the opening 22 of an airtight container 21 such as a flask. A locking flange 7 with a slightly larger diameter is formed below the connecting thread 6 formed on the upper outer periphery of the airtight joint 5, and the entire outer periphery below the locking flange 7 is tapered. That is, it is formed so that its diameter decreases as it goes downward. A tapered insertion part 9 is formed from the lower end of the threaded part 8 formed on the outer periphery of the airtight joint part 5 continuously from this locking collar, and the upper end of this insertion part 9 and the threaded part 8
A seal packing 11 is accommodated in an annular groove 10 provided between the two. Further, a vertical through hole 12 is provided at the center of this airtight joint. 13 is containment room 3
A somewhat large diameter rotor made of a magnet or other material is housed in a space separated from the excitation stator 2, and is fixed to the upper end of a mounting shaft 14, and a chuck 15 is mounted on the lower part of this mounting shaft. 16 is an adjustment ring screwed onto the threaded portion 8; 17 is a shaft to which a stirring blade (not shown) is attached at the lower end; the upper part of this shaft 17 is detachably attached to the lower part of the mounting shaft 14 by the chuck 15; Link. In the figure, 18 and 19 are bearing parts such as bearings, and 20 is a seal packing.

In this embodiment, the motor body 1 and the airtight joint 5 are detachably connected with a screw, but it goes without saying that they may be detachably attached using any other known attachment/detachment means.

Next, to explain the operation of this embodiment, when mixing and stirring chemicals that are flammable or harmful to the human body contained in the airtight container 21, the opening of the airtight container 21 is sealed. The connecting threaded part 6 of the airtight joint part 5 is threaded into the threaded groove 4 existing at the lower part of the motor body 1, and the inside of the accommodation chamber 3 in which the rotor 13 is accommodated is made airtight from the outside world by interposing the seal packing 20. Keep it. Next, the lower part of the shaft 17 with the stirring blade attached thereto is inserted into the airtight container 21 and the airtight joint 5 is attached to the opening 22. In this case, since the airtight joint 5 itself serves as a support for the motor body 1, there is no need for a motor support stand or the like as in the conventional case.

In this way, when the airtight joint 5 is fitted and attached to the opening 22 of the airtight container 21, the opening 22 and the airtight joint 5 are kept airtight by the seal ring 11, and the airtight joint 5 is Since it does not rotate,
Seal packing 1 connects airtight joint 5 and airtight container 21
Although it is pressed by the airtight container 21, there is no abrasion due to frictional rotation, and the durability of the sealing property is increased, and the airtightness with the airtight container 21 can be improved. Airtight container 2
1 attempts to communicate with the storage chamber 3 through the through hole 12, but since the storage chamber 3 is airtight from the outside world, vaporized gas from the chemicals in the airtight container 21 leaks out of the airtight container. Never. Furthermore, since the rotor 13 and the excitation stator 2, which is the power supply section, are completely isolated by metal or resin, it is possible to prevent ignition of flammable gas and corrosion caused by corrosive gas. Mixing and stirring can also be carried out while maintaining the low pressure or high pressure of 21.

In this embodiment, the motor main body and the airtight joint part are described as being detachable, but the airtight joint part 5 and the motor main body 1 may be constructed integrally (FIG. 4).

The present invention as described above has the motor body and the airtight joint part integrated or removable, making it convenient to handle. By simply attaching this device to the opening of an airtight container, the interior can be kept airtight and stirring operations can be started immediately. Since the motor body is directly supported by the airtight joint 5, a motor stand for supporting the motor can be made unnecessary, and the inside of the airtight container can be kept airtight just by attaching this device to the opening. At the same time, since the agitation shaft does not rub against the seal ring, it is possible to use a small motor with a weak torque, which allows the motor to be used as is without reducing its torque. By isolating the stator and the rotor, which is the rotating part, durability against flammable and corrosive properties can be increased, and worker safety can be ensured from mixing and stirring of flammable, corrosive, and toxic chemicals. It has the advantage of being able to

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a cross-sectional view of the whole with some parts omitted, FIG. 2 is a cross-sectional view of the motor body, FIG. 3 is a cross-sectional view of the airtight joint, and FIG. 4 is a cross-sectional view of the motor body. 1 shows a second embodiment, and is a partially cutaway front view in which the motor body and the airtight joint are integrally constructed, and FIG. 5 is a sectional view of a main part showing a conventional example. DESCRIPTION OF SYMBOLS 1... Motor body, 2... Excitation stator, 5... Airtight joint part, 10, Annular groove, 11... Seal packing, 12, Through hole, 13... Rotor, 14, Mounting shaft, 15, Chuck.

Claims (1)

[Scope of utility model registration request] A seal gasket for sealing between the opening and the airtight joint is installed in an annular groove provided on the intermediate outer periphery of the airtight joint to be inserted and fitted into the opening of the airtight container containing the mixture to be mixed. A mounting shaft having a large diameter rotor at the top is rotatably supported in a through hole provided vertically in the center of this airtight joint, and the lower end of the mounting shaft protrudes below the airtight joint. An airtight joint is provided, in which a shaft holding a shaft having stirring blades is attached, and a motor body having a built-in excitation stator isolated from the rotor is attached integrally or attachably to the upper part of this airtight joint. motor.