JPS6361138A - Viscosity measuring apparatus - Google Patents

Abstract

PURPOSE:To measure the viscosity of a liquid without taking out the liquid in a mixing tank to the outside, by immersing a stirring part in the liquid within the tank to drive the same and calculating the viscosity of the liquid corresponding to the moving quantity of a moving cylinder moving corresponding to the viscosity of the liquid. CONSTITUTION:When a measuring apparatus is driven by a power source, the drive shaft 4 of the measuring apparatus rotates to transmit rotary force to a moving cylinder 6. This rotation is also transmitted no only to outer cylinder 7 but also to a follower shaft 5 through a friction ring 10 and a spring 11 to rotate a stirring part. The stirring part receives the resistance of viscosity rising with the dissolution of a resin and the ring 10 slides on the cylinder 6 and the shaft 5 becomes rotation delayed in a phase with respect to the shaft 4 and, corresponding to this, the cylinder 7 allows the cylinder 6 having threading relation to the cylinder 7 to move as shown by a dotted line to compress the spring 11. Then, the friction force between the ring 10 and the leading end surface of the cylinder 6 increases gradually with the movement of the cylinder 6. When the rising in viscosity is stopped, the sliding between the ring 10 and the leading end surface of the cylinder 6 is lost and the movement of the cylinder 6 is stopped and, from the scale pointed by an indicator corresponding to the moving quantity of the cylinder, the dissolving state, viscosity rising state, completion of dissolution and viscosity of the resin can be determined.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a viscosity measuring device, more specifically a reaction device,
The present invention relates to a novel viscosity measuring device that can measure the viscosity of a liquid in a reaction tank such as a mixing device or a tank such as a mixing tank without first taking it out of the tank.

(Prior Art) Conventionally, a large number of reaction devices, mixing devices, etc. have been used in many fields, and these devices often include a device for stirring the liquid inside a tank such as a reaction tank or a mixing tank. A stirring device is provided. When carrying out various chemical reactions and mixing operations in such a stirring device, the viscosity of the internal liquid often changes, and by measuring these viscosity changes, it is possible to It is necessary to know the state of the internal liquid.

A method of measuring the viscosity of a liquid in a tank is to sample a portion of the liquid from inside the tank to the outside of the tank, and measure the viscosity at any given time using, for example, a capillary viscometer, falling ball viscometer, or rotational viscometer. Methods have been used to measure the viscosity of liquids.

(Problem to be solved by the invention) When using the conventional viscometer as described above, the liquid in the tank must be sampled each time, and measurement conditions such as temperature must be set and measured each time. There is the complication of not having to do this. In addition, if the viscosity in the tank changes from moment to moment, it is possible to sample the sample at regular intervals and measure the viscosity to find out the relationship between time and viscosity. Since measurement conditions must be set each time, sampling, etc., takes time, and the data obtained is discontinuous and quite coarse, making it impossible to know the exact relationship between time and viscosity.

Therefore, when performing chemical reactions, mixing operations, etc., there is a strong demand for technology that can measure the viscosity of liquid in tanks such as reaction vessels and mixing vessels at any time or continuously without requiring complicated operations.

(Means for Solving the Problems) The present inventor has solved the problems of the prior art as described above, and as a result of intensive research in order to meet the demands of the industry, has found that the viscosity load applied to stirring devices such as reaction devices and mixing devices By detecting the viscosity as it is and using it as the viscosity value, we have created a device that can immediately measure the viscosity of the liquid in the tank without having to sample the liquid in the tank each time or setting measurement conditions each time. developed.

That is, the present invention provides a movable cylinder at the tip of a drive shaft that rotates in conjunction with a power source, which rotates together with the drive shaft and is movable in the axial direction of the drive shaft, and a stirring section at the tip. One end of a spring is fixed to one end of the root of the driven shaft to be fixed, and a friction ring is fixed to the other end of the spring, and this friction ring is slidably pressed against the distal end surface of the movable cylinder. This viscosity measuring device is characterized in that an outer cylinder fixed to the root portion is mounted on the movable cylinder, and the outer cylinder and the movable cylinder are screwed together at a thread formed on the circumferential surface in contact with the outer cylinder.

(Function) The viscosity measuring device of the present invention described above is used as a power source of a stirring device in a reaction device, a mixing device, etc., for example, a rotating shaft connecting a motor and a stirring section, or a part thereof, to rotate the drive shaft. The rotation is transmitted to the driven shaft via the movable cylinder, friction ring, and spring, and the stirring section rotates in the liquid in the tank, but the viscosity load on the driven shaft is small and it moves with the friction ring. When the cylinder and the distal end surface do not slide due to their frictional force, the rotational force of the drive shaft is transmitted as is to the driven wheel without any phase delay. On the other hand, when the viscous load applied to the driven shaft increases, sliding occurs between the friction ring and the tip surface of the moving cylinder to overcome the frictional force, and the driven shaft lags behind the moving cylinder in phase. It will survive and rotate. As a result, the movable cylinder screwed into the outer cylinder moves in the direction of the driven shaft. If the viscosity of the liquid in the tank is constant, the movement of the movable tube compresses the spring and increases the frictional force between the friction ring and the tip of the movable tube. The surface will no longer slide, and as a result, the movement of the movable tube will stop, and the amount of movement of the movable tube at this time will be expressed as the viscosity of the liquid in the tank.

The above action occurs when the viscosity of the liquid in the tank is constant, and such movement of the movable tube is completed in a very short time, and the viscosity can be determined by the amount of movement of the movable tube. On the other hand, when the viscosity of the liquid in the tank changes from moment to moment, for example, when the viscosity of the liquid increases over time as in a polymerization reaction, the above action causes the moving cylinder to move continuously as the viscosity of the liquid increases. Since it moves, changes in the viscosity of the liquid in the tank over time can be detected moment by moment and continuously based on the amount of movement of the moving cylinder.

(Example) An example of the viscosity measuring device of the present invention will be described with reference to the drawings.

Reference numeral 1 designates a base, and the base 1 is provided with a first bearing body 2 and a second bearing body 3 with a space therebetween as required, and the first bearing body 2 is provided with a bearing body 2 that is connected to a power source. A rotating drive shaft 4 is fitted and supported, and a driven shaft 5 having an agitation portion on its tip surface is fitted and supported on the second bearing body 3. Then, a movable cylinder 6 is coupled to a spline shaft to the tip of the drive shaft 4 protruding from the first bearing body 2, and thus the movable cylinder 6 rotates together with the drive shaft 4 due to the rotation of the drive shaft 4, or The movable member 6 is movable in the axial direction of the agitator shaft 4. Further, a bottomed outer cylinder 7 is fixed to the root of the driven shaft 5 protruding from the second IP4I receiver 3, and a thread 8 formed on the inner peripheral surface of the outer cylinder 7 and an outer peripheral surface of the movable cylinder 6 A friction ring 10 is loosely fitted to the root of the driven shaft 5, and a spring 11 is interposed between the J2 friction ring 10 and the bottomed portion to fix one end thereof. , the friction ring 10 is movably pressed against the distal end surface of the movable cylinder 6 by the elasticity of the spring 11. Furthermore, if necessary, a flange body 12 is fixed to the root end of the movable cylinder 6, and the tip of a stylus (not shown) of a dial gauge type indicator having a viscosity scale, for example, is brought into contact with the flange body 12. I did it like that.

Next, the operation of the viscosity measuring apparatus of the above embodiment will be explained using an example in which the viscosity measuring apparatus of the above embodiment is used as a part of the rotating shaft of a stirring device of a synthetic resin melting apparatus.

When a solvent and resin are placed in a dissolving device and dissolved while stirring, the viscosity increases as the resin melts, and as the dissolution is completed, the viscosity increase becomes constant. By using the viscosity measuring device of the present invention, the viscosity can be easily measured. That is,
When the drive shaft 4 is driven by a power source, the drive shaft 4 of the viscosity measuring device rotates due to this drive, and this rotation is directly transmitted to the movable cylinder 6 spline-coupled to the drive shaft 4.
Furthermore, the rotation causes frictional contact with the tip surface of the movable cylinder 6 r! J
Transmission is transmitted to the driven shaft 5 along with the outer cylinder 7 via the friction ring 10 and the spring 11 to rotate the stirring section, but since the viscosity of the solution increases as the resin melts, the stirring section has a resistance corresponding to the viscosity. In response, the friction ring 10 moves the movable tube 6
While sliding on the tip surface of the driven shaft 5, the driven shaft 5 rotates with a phase delay relative to the drive shaft 4, and the outer cylinder 7 is engaged with the driven shaft 7 in response to the rotation with a phase delay. The movable cylinder 6 is moved from the solid line shown in the figure to the dotted line shown, and at the same time the spring 11 is compressed. As the movable tube 6 moves, the spring 1
1 increases, and thus the friction ring 10 and the movable cylinder 6
However, as the viscosity of the solution increases as the resin melts, the movement of the moving cylinder 6 continues. When the melting is completed and the increase in viscosity disappears, the friction ring 10 and the distal end surface of the movable tube 6 no longer slide, that is, when the phase delay of the driven shaft 5 with respect to the drive shaft 4 disappears, the movement of the movable tube 6 stops. Stop. During this time, the state of melting of the resin in the tank, the state of increase in viscosity, the completion of melting, and its viscosity can be directly known from the scale indicated by the pointer of the indicator according to the amount of movement of the moving cylinder 6.

The example shown below is an example of measuring the viscosity when the viscosity of the liquid in the tank changes, but even if the viscosity of the liquid in the tank is constant, it is possible to immediately know the viscosity in the same way. be. Furthermore, the viscosity of liquids ranges from low viscosity to extremely high viscosity, and the viscosity measuring device of the present invention can measure the viscosity by selecting the strength of the spring and the coefficient of friction between the friction ring and the tip surface of the movable tube. This is sufficient for measuring the viscosity of liquids with a viscosity of . Furthermore, the viscosity measuring device of the present invention can be attached to a part of the rotating shaft of various stirring devices,
It may be used as a stirring device and a viscosity measuring device, or it can be used as a viscosity measuring device by itself.

Incidentally, the movement of the movable cylinder may be measured with a displacement meter, and the output signal from the displacement meter may be converted and processed through a signal conversion circuit and an arithmetic circuit to digitally display the viscosity on a digital display device. .

(Effects of the Invention) As described above, according to the viscosity measuring device of the present invention, when a stirring section is provided on the driven shaft of the device and the stirring section is placed in the liquid in the tank and the power source is driven, the viscosity of the liquid changes. Since the movable cylinder moves accordingly, the amount of movement can be measured by a displacement meter or other f-stage, and the viscosity corresponding to this amount of movement can be determined. Therefore, it is possible to directly know the viscosity of the liquid in the tank at the same time as the stirring operation, and the complicated work of sampling the liquid in the tank each time and setting measurement conditions each time as in conventional methods is completely eliminated. It was done.

Furthermore, even if the viscosity of the liquid in the reactor increases over time, the viscosity can be constantly measured, and the relationship between time and viscosity can be continuously and accurately determined. Therefore, it is possible to automate the viscosity measurement of various liquids.

[Brief explanation of the drawing]

The drawing is a sectional view of one embodiment of the viscosity measuring device of the present invention. 4...-Drive shaft 5...-Driven shaft 6...
...-Moving cylinder 7-----Outer cylinder 8.9.
...Screw 10...Friction ring 11...Spring Applicant: Tohoku Machinery Co., Ltd. (and one other person) Procedure Nei 1o Authorized letter (voluntary) September 2, 1986

Claims (1)

[Claims] A movable tube that rotates together with the drive shaft and is movable in the axial direction of the drive shaft is provided at the tip of the drive shaft that rotates in conjunction with the power source, and a root of the driven shaft that fixes the agitation unit to the tip. an outer cylinder having one end of a spring fixed to one end and a friction ring fixed to the other end of the spring, the friction ring being slidably pressed against the distal end surface of the movable cylinder, and fixed to the root of the driven shaft; The viscosity measuring device is characterized in that the movable tube is externally packaged with the movable tube, and the outer tube and the movable tube are screwed together at a thread formed on the circumferential surface in contact with the outer tube.