JPH10128131A - Temperature control system of heater in chemical reaction tester - Google Patents

Abstract

(57) [Summary] [PROBLEMS] A simple and reliable mechanism that can perform temperature control necessary for heating quickly and sensitively, and requires little power for raising and lowering a heater, and can proceed a chemical reaction safely and normally. To provide a high temperature control system for a chemical reaction tester. SOLUTION: A thermo-control kettle for selectively floating and separating the reaction vessels and selectively performing heat radiation and heating of the vessel is adopted. When the temperature is in the zone, the reaction vessel is enclosed and heated while generating heat, and when the temperature in the reaction vessel reaches the limit of the safe reaction zone, the function is provided in which the reaction vessel is relatively levitated to release heat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature control technique for a heater in a chemical reaction tester, and more particularly, to controlling the temperature of a heater for a chemical agent contained in a reaction vessel and subjected to a reaction test. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature control system for a heater in a chemical reaction tester having a simple and highly reliable mechanism capable of controlling an overreaction and safely and normally proceeding a chemical reaction by controlling the same.

[0002]

2. Description of the Related Art A heating medium filled in a heating tank is heated by a heater (electric heater), and the current temperature of the heating medium is measured by a temperature sensor, and the measured value becomes higher than a reference value. The inventors of the present invention have already proposed a "temperature-adjustable heat radiator" in which the heating tank is lowered so that the immersion surface area of the reaction vessel immersed in the heat medium liquid is reduced at the time. (See Japanese Utility Model Publication No. 3-43274).

However, this method employs a method of heating the chemical agent in the reaction vessel using the sensible heat of the heat transfer medium, so that additional time is required for heating the heat transfer liquid. In addition to the disadvantage that the temperature of the heat transfer fluid itself cannot be controlled quickly and sensitively, the heating tank containing the heat transfer fluid must be moved up and down as a whole, requiring large lifting power. As a result, there is a problem that the entire apparatus is enlarged.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problem in the temperature control method of a heater described in Japanese Utility Model Publication No. 3-43274, and
It is an object of the present invention to provide a temperature control system for a heater of a chemical reaction tester, which can perform temperature control required for heating sensitively and quickly, and requires a small power for raising and lowering the heater. .

Another technical object of the present invention is to provide a simple mechanism capable of suppressing the overreaction of a chemical agent by appropriately controlling the temperature control of a heater, and allowing the chemical reaction to proceed safely and normally. To provide a reliable temperature control system.

Another technical problem of the present invention is that the temperature control response to the setting is so sensitive that it requires quick setup and complicated mechanical adjustment even if the kind of chemical agent to be tested is changed quickly. It is an object of the present invention to provide a practical system that can execute a test immediately without any problem.

[0007]

Means adopted by the present inventor to solve the above technical problem will be described below with reference to the accompanying drawings.

That is, the present invention employs a thermo-control kettle unit 2 that relatively floats and separates the reaction vessel 1 to selectively perform heat radiation and heating of the reaction vessel. When the temperature inside the reaction vessel 1 is in the safe reaction zone, the reaction vessel 1 is enclosed and heated while generating heat. Conversely, when the temperature inside the reaction vessel 1 reaches the limit of the safe reaction zone, the reaction vessel 1 is turned off. It is characterized in that a temperature control system of a heater in a chemical reaction tester is configured by adopting the lifting / lowering means 3 which can release heat by relative floating. By adopting such means, the present invention can perform the temperature adjustment required for heating sensitively and quickly, and the power required for raising and lowering the heater is small, so that the entire system of the chemical reaction testing machine is compact. It has become possible to configure it.

However, as a heating mechanism of the thermo-control kettle unit 2 employed in the present invention, a known induction heating system, a dielectric heating system, an infrared heating system, or a resistance heating system can be adopted. As a cooling mechanism of the control shuttle unit 2, a simple cooling system by separating from the heat generating part, an injection air cooling system by blowing air, a forced cooling system by blowing cooling gas, and the like can be adopted.

Next, as means for relatively floating and separating the reaction vessel 1 and the thermo-control kettle section 2, isometric links 31, 31...
It is preferable to adopt a lifting / lowering platform of a tongue-type pandagraph mechanism manufactured by connecting the ends of the vertical direction. The lifting platform 3 of the pandagraph mechanism thus manufactured
This is because the level of the mounting surface 32 can be freely and quickly changed in a stepless manner by adjusting the cross (crossing) angle between the isometric links 31 and 31 pivotally connected in the cross state. is there. By the way, the level adjustment of the mounting surface 32 of the lifting platform 3 of the pandagraph mechanism is carried out by connecting the ends of the equal-length links 31 and 31 between the opposed bent portions 33 and 33.
It is also possible to arrange the jack 34 manually by operating the jack 34 with a handwheel 34a,
Further, a ball screw mechanism 35 may be provided between the bent portions 33 and 33, and the ball screw mechanism 35 may be moved up and down by automatic control in conjunction with the temperature in the reaction vessel 1.
In this case, as means for linking the elevating table 3 and the temperature in the reaction vessel 1, a well-known temperature sensor 4 (thermocouple, resistance thermometer, etc.) which detects the temperature in the reaction vessel and outputs it as an electric signal ) Is adopted. Also,
When such a temperature sensor 4 is employed, an overheating signal is output when the temperature in the reaction vessel 1 is overheated to a predetermined value or more, and an alarm 5 is provided, and an alarm is issued in conjunction with the overheating signal. May be constituted.

Further, in the system according to the present invention, a stirring blade 6 is provided in the reaction vessel 1 so that the reaction of the chemical agent in the reaction vessel 1 proceeds and the viscosity of the reactant rises. It is also possible to provide an alarm 7 for notifying the end of the reaction by the control motor 61 issuing an end signal when the addition to the control motor 61 for rotating the stirring blade 6 reaches a certain value. In this case, the control motor 61 that has issued the end signal is stopped.

Each mechanism enabling the above automatic control
By adopting 35.4.5.6.6.61.7, overreaction of chemical agents can be properly suppressed, and safe and normal chemical reaction test can be performed. In addition, temperature control reaction to setting can be performed. Even if the kind of chemical agent to be tested is sensitive and rapid, the test can be performed immediately without complicated setup and complicated mechanical adjustment.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to specific illustrated embodiments. FIG. 1 is an explanatory view of a mechanism showing a first embodiment of the present invention system, and FIG. 2 is an explanatory view of a mechanism showing a second embodiment of the present invention system.

[First Embodiment] In FIG.
The one designated by reference numeral 1 is a three-necked heat-resistant glass reaction container containing a chemical agent to be subjected to a reaction test,
Conventionally known. The reaction vessel 1 is supported by a stand (not shown), and its bottom is maintained at a predetermined height.

The reference numeral 2 designates a thermo-control kettle. In this embodiment, a well-known induction heating type heating unit 21 for heating a chemical contained in the reaction vessel 1 to promote the reaction. , And air-cooling nozzles 23, 23,... For injecting air into the kettle unit by the blower pump 22 to radiate heat of the chemical agent in the reaction vessel 1 are provided. The thermo-control kettle unit 2 is mounted on a lift table to be described later so as to be able to move up and down, and the reaction vessel 1 supported by a stand (not shown) so as to be enclosed inside the kettle unit 2 is moved up and down. It will float and settle relatively depending on the elevating operation of the table. The state of the reaction vessel 1 in FIG. 1 indicates that the bottom surface of the reaction vessel 1 is separated from the inner surface of the kettle portion by the settling of the elevating platform.

The one designated by reference numeral 3 is an isometric link 31.
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It is a lifting platform of the mechanism, on the upper part of which the thermocontrol shuttle 2 is mounted as a mounting surface 32. In the lift 3 of the first embodiment, a jack 34 is provided between link bent portions 33, 33 formed by a connecting portion between the isometric links 31, 31 located at an intermediate portion. By rotating the handwheel 34a of the jack 34 in the forward and reverse directions, the height level of the mounting surface 32 of the lift table can be freely and manually adjusted.

The one designated by reference numeral 4 is a conventionally known temperature sensor using a thermocouple, which is inserted into the chemical agent from the side opening of the reaction vessel 1. The temperature sensor 4 outputs an overheat signal when the temperature of the reacting chemical agent in the reaction vessel 1 exceeds a predetermined safe reaction range and overheats.
The overheat signal output from the temperature sensor 4 is input to a controller C comprising a microcomputer, and is subjected to a judgment process. When the signal is judged to be a dangerous value, a command signal is issued to the alarm device 5 to emit a warning sound.

The warning sound calls attention of a test staff (not shown) to call the chemical reaction tester, and the staff operates the handwheel 34a of the elevator 3 to move the reaction vessel. 1 is separated from the thermo-control hook 2.

When the reaction vessel 1 is separated from the thermo control pot 2, the position sensor 24 disposed at a predetermined position of the pot 2 generates a separation signal and sends the signal to the controller C. Then, the controller C generates a control signal to stop the heat generation of the heating unit 21, drives the blower pump 22 to inject air from the air-cooling nozzles 23, 23. The heat of the chemical agent, which has been sprayed on the outer surface and raised in temperature, is quickly radiated. Thus, the reaction vessel 1
When the temperature of the medicine in the inside has returned to the normal value, the overheating signal of the temperature sensor 4 is stopped, and the alarm 5 emits a signal sound of warning release.
When the handwheel 34a is operated to return the reaction vessel 1 to the enclosing position of the thermocontrol kettle section 2, the heating section
While the 21 generates heat, the blower pump 22 is stopped. Such an operation of the present embodiment is appropriately performed until the chemical reaction in the reaction vessel 1 is completed.

A stirring blade 6 is inserted into the reaction vessel 1 from the center cylinder opening of the reaction vessel 1 in FIG. 1, and the control motor 61 stirs the medicine in the vessel. When the reaction of the drug in the reaction container 1 progresses,
In most cases, the viscosity increases, so the additional value that is added incrementally to the control motor 61 is measured, and that value is set as an empirical value, and the reaction ends when more is added. In this case, it is also possible to notify the completion of the test and stop the control motor 61.

[Second Embodiment] The second embodiment of the present invention shown in FIG. 2 differs from the first embodiment in the following point. In the first embodiment, the lift 3 is manually moved up and down by the jack 34 and the handwheel 34a. On the other hand, in the second embodiment, the lift 3 is located at an intermediate portion. A ball screw mechanism 35 is interposed between link bending parts 33 and 33 formed by a linking part of the long links 31 and 31, and the ball screw mechanism 35 moves up and down by forward and reverse rotation of a lifting control motor 36. The point that has become. In the first embodiment, the overheat signal output from the temperature sensor 4 is controlled by a controller C comprising a microcomputer.
In the second embodiment, a warning signal is issued by issuing a command signal to the alarm device 5 when the alarm signal is determined to be a dangerous value. The overheating signal output from the temperature sensor 4 is input to a controller C comprising a microcomputer, and is subjected to a judgment process to determine the danger value.
By transmitting a control signal to the motor 36 and driving the motor, the crossing angle of the isometric links 31, 31,... Is changed by the ball screw mechanism 35, and the level of the mounting surface 32 of the lift table 3 is interlocked. When the temperature inside the reaction vessel returns to the safe reaction zone, the level of the mounting surface 32 of the lifting platform 3 is raised in conjunction with the reaction vessel 1 so that the reaction vessel 1 and the thermo-control pot 2 are automatically controlled. The point that can be between float and sink. Position sensor installed in thermo control hook 2
The operation of 24 is basically the same as that of the first embodiment. In the first embodiment, as a heat radiation mechanism of the thermocontrol kettle 2, a jet air cooling system that blasts air into the kettle with the blower pump 22 to dissipate heat of the chemical agent in the reaction vessel 1 is provided. On the other hand, in the second embodiment, when the position sensor 24 issues a separation signal and sends it to the controller C, the controller C issues a control signal to generate heat of the heating unit 21. At the same time, a cool air injection command signal is issued to open the solenoid valve 25 of the liquid nitrogen cylinder N, and cool nitrogen gas is injected from the cool air nozzles 23, 23,. Is designed to rapidly cool the heat of the chemical agent, which has been sprayed on and heated to a high temperature. In addition, as the reaction vessel 1 in the second embodiment, a stainless steel container having chemical resistance is adopted. In the first embodiment, the stirring blade 6 is inserted into the reaction vessel 1 from the center tube opening of the reaction vessel 1 and the control motor 61 is used to stir the medicine in the vessel. In the second embodiment, the stirring blade 6 rotated by the control motor is inserted into the reaction vessel 1 from the center cylinder opening, and the viscosity of the reactant in the vessel 1 increases, so that the control motor When the addition to the control reaches a certain value, the control motor is stopped, and at the same time, a notification end signal is issued, and the pilot lamp 7 blinks to notify the completion of the reaction to notify the completion of the reaction.

According to the system of the second embodiment, the chemical reaction test can be automatically and safely performed accurately, and the number of personnel can be significantly reduced.

Although the embodiments of the present invention specifically listed in the specification of the present application are generally as described above, the present invention is by no means limited to the above-described embodiments, and is described in the claims. It goes without saying that various design changes are possible within the enclosure.

[0024]

As described above in detail with reference to the embodiment, the system configured by applying the present invention is as follows.
As the thermo-control kettle adopts a mechanism to directly heat the reaction vessel, the actual proposed 3-43274.
As compared with the system described in Japanese Patent Application Laid-Open Publication No. H10-107, the weight can be reduced and the lifting / lowering power can be significantly reduced, so that the entire apparatus can be made compact.

Further, according to the present invention, temperature control for heating and heat radiation can be performed promptly and sensitively, so that overreaction of a chemical agent can be effectively suppressed and safe. The control reaction is sensitive and quick, so even if the type of chemical agent to be tested changes, it has an excellent practical effect such that complicated setups can be performed immediately without the need for complicated mechanical adjustments. can get.

As described above, although the present invention can realize outstanding practical effects which cannot be expected from a system of this type, its structure is simple and its manufacturing cost is low. The above utility value is very large.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a mechanism showing a first embodiment of a system of the present invention.

FIG. 2 is an explanatory view of a mechanism showing a second embodiment of the system of the present invention.

[Description of Signs] 1 Reaction vessel 2 Thermo-control kettle 21 Heating section 22 Blowing pump 23 Air-cooled or cool air nozzle 24 Position sensor 25 Solenoid valve 3 Elevating table 31 Equal length link 32 Mounting surface 33 Link bent portion 34 Jack 34a Handwheel 35 Ball screw mechanism 36 Elevation control motor 4 Temperature sensor 5 Alarm 6 Stirrer blade 61 Control motor C Controller N Liquid nitrogen cylinder

Claims (6)

[Claims] 1. A thermo-control kettle for relatively floating and separating a reaction vessel to selectively perform heat radiation and heating of the vessel, wherein the thermo-control kettle has a temperature within the reaction vessel. When it is in the safe reaction zone, it heats up and heats up the reaction vessel while generating heat, and conversely, when the temperature in the reaction vessel reaches the limit of the safe reaction zone, the reaction vessel is relatively floated to release heat. Temperature control system of the heater in the chemical reaction tester. 2. A thermo-control kettle unit is provided on a lifting platform, and includes a lifting mechanism unit for selecting heat radiation and heating by changing a relative level with respect to a reaction vessel held in a fixed position. The elevating table adjusts the relative level between the reaction vessel and the thermo-control pot in response to the control signal output from the temperature sensor inserted in the reaction vessel, so that the temperature in the reaction vessel becomes a safe reaction zone. When the temperature in the kettle matches the reaction vessel, the vessel is heated and heats up in a contained state, and conversely, when the temperature in the reaction vessel reaches the limit of the safe reaction zone, the kettle falls down and reacts. The temperature control system of a heater in a chemical reaction testing machine according to claim 1, wherein the container is relatively levitated to radiate heat. 3. The thermo-control kettle is characterized in that when the temperature in the reaction vessel reaches the limit of a safe reaction zone, the reaction vessel is relatively levitated to forcibly radiate heat while injecting cool air. The temperature control system for a heater in a chemical reaction tester according to claim 1 or 2. 4. The lift platform includes a tongue-type pandagraph mechanism in which isometric links are crossed, and a cross angle at the link is changed by a control signal output from a temperature sensor inserted in the reaction vessel. The temperature control system for a heater in a chemical reaction tester according to any one of claims 1 to 3, wherein the support level of the thermocontrol pot is adjusted by means of a thermostat. 5. A thermo-control pot is installed on a manual lifting platform, while a temperature sensor inserted in a reaction vessel outputs an overheat signal to activate an alarm, and an alarm of the alarm is issued. 2. The temperature control system for a heater in a chemical reaction tester according to claim 1, wherein the thermo-control pot portion is separated from the reaction vessel to radiate heat by lowering the manual lifting platform manually in response to the condition. 6. A stirrer, which is rotationally driven by a control motor, is inserted into the reaction vessel, and the control motor reacts when the viscosity of the reactant in the vessel increases and the addition to the control motor reaches a certain value. The temperature control system for a heater in a chemical reaction tester according to any one of claims 1 to 5, wherein the notification mechanism is operated by issuing an end signal.