JP2015051401A - Kneader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a kneader where the temperature of a material to be kneaded can be measured in better response accuracy while preventing the damage of a thermocouple.SOLUTION: A thermocouple 20 to measure the temperatures of a paddle to knead a material to be kneaded in a kneading chamber 2 and a the material to be kneaded in the kneading chamber 2 is disposed. An electrode part 20a and a protection cylinder (second hollow rod 22a) covering the outer periphery of the electrode part 20a and being relatively movable to the electrode part 20a are disposed at the thermocouple 20. The tip of the thermocouple 20 can be approached to the rotation region of the paddle in the kneading chamber 2 together with the second hollow rod 22a and retracted from the rotation region.

Description

  The present invention relates to a kneader having a paddle for kneading a material to be kneaded in a kneading tank and a thermocouple for measuring the temperature of the kneaded material in the kneading tank.

  Conventionally, in this type of kneader, it is known to knead the material to be kneaded while cooling or heating. Accurately grasping the temperature in the kneading tank at the time of kneading is important for obtaining a high-quality kneaded product. In particular, when kneading while cooling from a high temperature to a low temperature, it is necessary to accurately maintain the desired temperature while preventing the temperature of the material to be kneaded from being excessively lowered.

  For this reason, as in Patent Document 1, the sheath-type thermocouple is made of a heat insulating material made of a resin hollow cylindrical member that holds its outer peripheral surface in a close fitting state, and the outer peripheral surface of this heat insulating material is in a close fitting state. What is attached to the tank body so that the protruding amount of the sheath type thermocouple into the tank can be adjusted by adjusting the fixing means consisting of the adapter screw through the adapter made of the cylindrical member to be held is known. . The tip of the thermocouple does not extend to the rotation region of the paddle, but extends to the region where the material to be kneaded exists so as to measure the temperature of the material to be kneaded. By doing so, the temperature of the material to be kneaded can be measured even during rotation of the paddle.

Japanese Patent No. 3992587

  However, in the thing of the said patent document 1, since the to-be-kneaded member kneaded by the paddle contacts a thermocouple, in order to maintain the intensity | strength of a thermocouple, you have to ensure the thickness of thermocouple itself.

  When the thickness of the thermocouple is increased, there is a problem in that the response becomes dull and the temperature of the material to be kneaded cannot be measured immediately and accurately.

  On the other hand, since the thermocouple may be inserted into the material to be kneaded with high viscosity even when the paddle is stopped, it is necessary to give the thermocouple strength enough to withstand it.

  The present invention has been made in view of this point, and an object of the present invention is to enable measurement of the temperature of the material to be kneaded with high response accuracy while preventing breakage of the thermocouple.

  In order to achieve the above object, according to the present invention, the thermocouple can be inserted up to the rotation region of the paddle together with a relatively movable protection cylinder.

Specifically, the first invention presupposes a kneader having a paddle for kneading the material to be kneaded in the kneading tank and a thermocouple for measuring the temperature of the kneaded material in the kneading tank,
The thermocouple includes an electrode part and a protective cylinder that covers and protects the outer periphery of the electrode part and is movable relative to the electrode part,
The tip of the thermocouple is provided in the kneading tank so that it can enter the paddle rotation area in the kneading tank together with the protective cylinder and can be retracted from the rotation area.

  According to the above configuration, since the electrode portion is protected by the protective cylinder when inserted into the kneading tank, the electrode portion is not easily damaged even if its thickness is reduced in order to improve responsiveness. Further, since the electrode portion can be inserted deeply into the paddle rotation region, the temperature of the member to be kneaded can be accurately measured.

In the second invention, in the first invention,
The protective cylinder is configured such that the electrode part can be exposed in the kneading tank by being retracted after being inserted into the kneading tank together with the electrode part.

  According to said structure, an electrode part is protected by a protection cylinder at the time of insertion, and it can measure by exposing an electrode part thinner than before at the time of measurement.

In the third invention, in the first or second invention,
The thermocouple is
A first cylinder that supports the thermocouple in a relatively movable manner;
A second cylinder coupled to be movable relative to the first cylinder,
The protective cylinder is composed of a second hollow rod of the second cylinder,
The proximal end side of the electrode part is accommodated in the first hollow rod of the first cylinder.

  According to the above configuration, accurate temperature measurement can be performed with the electrode portion that is kept thin while easily protecting the electrode portion with a simple configuration.

In the fourth invention, in any one of the first to third inventions,
The paddle is configured to stop rotating when the thermocouple is inserted into the kneading tank.

  According to said structure, damage to the thermocouple by a paddle can be prevented reliably.

  As described above, according to the present invention, the thermocouple is provided with an electrode portion and a protective cylinder that covers and protects the outer periphery of the thermocouple, and the tip of the thermocouple is kneaded with the protective cylinder. The temperature of the material to be kneaded can be measured with high response accuracy while preventing breakage of the thermocouple by providing the kneading tank so that it can enter the rotation region of the paddle and can be retracted from the rotation region.

It is an expanded sectional view which shows a thermocouple and its periphery, (a) shows the time of standby, (b) shows the time of insertion, (c) shows the time of measurement, respectively. It is a front view which fractures | ruptures and shows a part of kneading machine which concerns on embodiment of this invention. It is the III-III sectional view taken on the line of FIG. It is a top view which shows a kneading machine.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  2 to 4 show a kneading machine 1 according to an embodiment of the present invention. The kneading machine 1 is rotatable in the kneading tank 2 and a kneading tank 2 having a body 2a having a substantially W-shaped cross section at the bottom. And a pair of paddles 3 supported by each other. The paddle 3 is formed with a kneading blade 3b eccentric to a main shaft 3a extending in the axial direction. For example, as shown in FIG. 3, one continuous heat medium channel 4 is formed inside the paddle 3. . The pair of paddles 3 have the same shape and are supported so as to be able to rotate in opposite directions in paddle bearings 2b (inside details not shown) provided at both ends of the body 2a with being shifted by 90 degrees from each other. The driven-side paddle bearing 2b side communicates with a flow path 4 formed in the driven main shaft 3a and extending in the axial direction, and allows the heat medium to be introduced into and discharged from the flow path 4. The side rotary joint 5 is connected. The base end side of the driven rotary joint 5 is coupled to the main shaft 3a so as to rotate integrally, but a hose (not shown) connected to the distal end side is prevented from rotating. The heat medium may be cooling water or warm water. On the other hand, one end of the drive-side main shaft 3 a is connected to the drive shaft 7 of the electric motor 6 by a gear coupling 8. A flow path 4 extending in the axial direction is also formed in the drive-side main shaft 3a.

  For example, as shown in FIGS. 2 and 4, the electric motor 6 is mounted on a motor base 6 a, and its rotating shaft 6 b is connected to a speed reducer / distributor 9, and the driving force is distributed to the driving shaft 7. It has become so. A drive-side rotary joint 10 is connected to the other end of the speed reducer / distributor 9 so as to communicate with the flow path 4 formed in the drive shaft 7. The proximal end side of the drive-side rotary joint 10 is connected to the drive shaft 7 so as to rotate integrally, but a hose (not shown) connected to the distal end side does not rotate. In this way, a continuous flow path 4 is formed between the driven side rotary joint 5 drive side and the drive side rotary joint 10 so that the heat medium is circulated in the flow path 4 by a circulation device (not shown). It has become. Although not shown in detail, a jacket through which a heat medium circulates is also provided on the outer periphery of the body 2a. The heat medium can be adjusted to a desired temperature by being heated by a heater or cooled by a cooler.

  The kneader 1 kneads the material to be kneaded by the paddle 3 in the kneading tank 2 while adjusting the temperature. For this reason, the kneading machine 1 has a thermocouple 20 for measuring the temperature of the kneaded material in the kneading tank 2 as shown in FIG.

  As shown in detail in an enlarged view in FIG. 1, the thermocouple 20 includes a first cylinder 21 made of, for example, an air cylinder that supports the thermocouple 20 so as to be relatively movable. Although not shown in detail, the first cylinder 21 is fixed to the outer wall or the like of the kneading tank 2 and is supplied with high-pressure air from a compressor or the like (not shown).

  The 1st cylinder 21 is connected with the 2nd cylinder 22 which consists of an air cylinder similarly. In the first hollow rod 21a of the first cylinder 21, the base end side of the electrode portion 20a is accommodated and fixed. Although not shown, the electrode unit 20a is connected to a measuring instrument, and temperature display is possible with this measuring instrument. The distal end side of the first hollow rod 21 a is fixed to the proximal end side of the second cylinder 22. The electrode portion 20a is inserted into the second hollow rod 22a of the second cylinder 22, and as a result, the second hollow rod 22a and the electrode portion 20a are relatively movable. From this, the 2nd hollow rod 22a has played the role as a protection cylinder which protects the electrode part 20a. Thus, for example, the electrode portion 20a can be operated with a simple configuration using two air cylinders. The second hollow rod 22a is preferably made of a material having high strength and high corrosion resistance such as SUS304. Moreover, the electrode part 20a is comprised with material with high corrosion resistance, such as SUS316L, for example, The outer diameter is about 1.6-10 mm, and is thinner compared with the conventional 15-20 mm.

  Although not shown in detail, a safety that automatically stops the paddle 3 when the second hollow rod 22a enters the body 2a of the kneading tank 2, that is, when the first cylinder 21 starts to extend. It is desirable to have a device. Alternatively, the first cylinder 21 may not be operated while the paddle 3 is rotating.

  Next, a method of using the thermocouple 20 of this embodiment will be described with reference to FIG.

  First, when the thermocouple 20 is not used, such as during rotation of the paddle 3, as shown in FIG. 1A, the second hollow rod 22a does not enter the body 2a, and the electrode portion 20a It is accommodated and protected in the hollow rod 22a. For this reason, even if the material to be kneaded is vigorously kneaded by the paddle 3, the electrode portion 20a is not damaged.

  Next, with the paddle 3 stopped, as shown in FIG. 1 (b), the first cylinder 21 is extended, and the second hollow rod 22 a is fully inserted to the paddle rotation region in the kneading tank 2. The insertion depth l may be adjusted each time with the first cylinder 21 or may be extended to the stroke end. In this embodiment, for example, l = 1000 mm. At the time of insertion, as shown in a partially enlarged view, since the electrode portion 20a is firmly protected by the second hollow rod 22a, even if the material to be kneaded has a high viscosity or a solid portion remains, Since the two hollow rods 22a serve as a protective cylinder, the electrode portion 20a is not damaged. Thus, when the thermocouple 20 is inserted into the kneading tank 2, the electrode portion 20a is protected by the second hollow rod 22a, which is a protective cylinder, so that the thickness of the electrode portion 20a is increased in order to improve responsiveness. Even if the thickness is reduced, the electrode portion 20a is prevented from being damaged.

  Next, as shown in FIG. 1C, the second cylinder 22 is contracted to retract only the second hollow rod 22a. Then, the electrode part 20a is exposed. Since the electrode portion 20a is protected by the second hollow rod 22a except during this exposure, the electrode portion 20a does not have an unnecessarily large thickness and is kept thin. For this reason, temperature measurement can be accurately performed in about 30 seconds, for example. Moreover, since the electrode part 20a can be inserted deeply into the rotation region of the paddle 3, the temperature of the member to be kneaded can be accurately measured.

  Therefore, according to the kneader 1 according to the present embodiment, the temperature of the material to be kneaded can be measured with high response accuracy while preventing the thermocouple 20 from being damaged.

(Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.

  That is, in the said embodiment, although the 1st cylinder 21 and the 2nd cylinder 22 were comprised with the air cylinder, you may comprise with a hydraulic cylinder or an electric cylinder.

  Moreover, in the said embodiment, although the thermocouple 20 is inserted toward the bottom face of the fuselage | body 2a from the side surface of the kneading tank 2, the insertion position is not specifically limited. If it is the rotation region of the paddle 3, it can be sufficiently inserted into the material to be kneaded to accurately measure the temperature. For example, when it is inserted into a portion where the material to be kneaded outside the rotation region of the paddle exists. Alternatively, the thermocouple 20 of the present invention can be used. Even in that case, if the electrode portion 20a is usually protected by a protective cylinder and the electrode portion 20a is exposed only during measurement, it is not necessary to make the electrode portion 20a thicker than necessary in order to increase the strength of the electrode portion 20a. .

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or a use.

1 Kneading machine
2 Kneading tank
2a fuselage
2b Bearing for paddle
3 paddle
3a Main shaft
3b Kneading blade
4 Channel
5 Driven rotary joint
6 Electric motor
6a Motor stand
6b Rotating shaft
7 Drive shaft
8 Gear coupling
9 Deceleration distributor
10 Drive side rotary joint
20 Thermocouple
20a Electrode part
21 1st cylinder
21a First hollow rod
22 2nd cylinder
22a Second hollow rod (protection cylinder)

Claims (4)

A kneader having a paddle for kneading a material to be kneaded in a kneading tank and a thermocouple for measuring the temperature of the kneaded material in the kneading tank,
The thermocouple includes an electrode part and a protective cylinder that covers and protects the outer periphery of the electrode part and is movable relative to the electrode part,
The kneading machine characterized in that the tip of the thermocouple is provided in the kneading tank so as to be able to enter the revolving area of the paddle in the kneading tank together with the protective cylinder and to be retractable from the rotating area. In the kneader according to claim 1,
A kneading machine, wherein the protective cylinder is configured to be exposed to the kneading tank by being retracted after being inserted into the kneading tank together with the electrode part. In the kneader according to claim 1 or 2,
The thermocouple is
A first cylinder that supports the thermocouple in a relatively movable manner;
A second cylinder coupled to be movable relative to the first cylinder,
The protective cylinder is composed of a second hollow rod of the second cylinder,
A kneader characterized in that a base end side of the electrode part is accommodated in a first hollow rod of the first cylinder. In the kneader according to any one of claims 1 to 3,
A kneader configured to stop the rotation of the paddle when the thermocouple is inserted into the kneading tank.

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