JP2529404Y2 - Vaporizer for moisture measurement device - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is based on the moisture content (moisture percentage) of materials (samples) such as powders and granular materials such as synthetic resin materials, ceramic materials, and pharmaceutical materials.
The present invention relates to a vaporization device for a moisture measurement device for measuring a water content.

[Conventional technology]

As a vaporizer for this type of moisture measuring apparatus, the present applicant has already proposed a vaporizer described in Japanese Patent Application No. 2-142874.

That is, when a sample such as a granular material taken in from a sample entrance and exit is accommodated in a boat, the boat is moved into a heating chamber by a reciprocating means to perform heat treatment, and the sample is heated in the heating chamber. The generated moisture is introduced into the titration cell together with the nitrogen gas, while the boat is retracted to discharge the used sample. In addition, the sample inlet / outlet, the main body of the boat, and the like can be turned over by a rotary drive means, and the used sample is hit from above with a knocker and discharged to the outside when the boat is turned over.

[Problems to be solved by the invention]

However, since the sample described in the specification of Japanese Patent Application No. 2-142874 is knocked down by a knocker, (a) a sample such as a resin pellet which is melted by heating in a heating chamber is placed in a boat. Stubbornly welded to the wall,
The knocker did not drop easily.

(B) There is a space between the heating chamber for drying the sample in the boat and the empty chamber of the main body, and there is a possibility that residual moisture in the main body may migrate to the heating chamber. There was a possibility that the measurement accuracy of the water content was difficult to perform accurately.

The purpose of the present invention is to provide a solution to all the above problems.

[Means for solving the problem]

In order to solve the above-mentioned problem, the present invention is to accommodate a sample such as a granular material taken in from a sample inlet / outlet in a boat, move the boat into a heating chamber by a reciprocating means, perform a heating process, and perform sample processing in the heating chamber. A vaporizer for a moisture measuring device, wherein water generated when heating is introduced into the titration cell together with nitrogen gas, while the boat is retracted and a used sample is discharged. The boat has a structure having a scraping mechanism for forcibly scraping off the attached sample.

It is preferable that all or at least the sample storage chamber of the boat is formed of a material having a high releasability such as Teflon.

At least the sample entrance / exit and the main body such as the boat can be configured to be reversible by the rotation driving means.

The boat may have a storage chamber with an open top, and the scraping mechanism may be a scraping member fixed to the tip of a rod also serving as a part of the reciprocating means and moving back and forth in the boat.

When the boat is moved to the heating chamber, the heating chamber and the main body may be airtightly divided by a sealing mechanism.

The rotation center line of the rotation drive means and the rotation center line of the boat are eccentric, and when the main body of the boat or the like is turned over, the front end surface of the boat comes into contact with the rear end surface of the fixed-side receiving cylinder, and the scraping mechanism moves forward. It can be possible.

[Action]

The sample taken in from the sample inlet / outlet is accommodated in a boat, and the boat is sent into a heating chamber by a reciprocating moving means and subjected to heat treatment, and the moisture of the sample generated in the heating chamber is introduced into the titration cell together with nitrogen gas to a predetermined amount. Perform moisture measurement.

A sample such as a powder or the like deposited in the boat can be forcibly scraped off after use, for example, by a scraping mechanism including a scraping member that moves forward and backward in the boat.

After completion of the measurement, the sample can be inverted by rotating the main body of the sample entrance / exit and boat, etc.
Since the process can be automatically and continuously discharged to the outside, all processes from the process of measuring the amount of water to the process of discharging can be continuously automated and brought online. In addition, the standby time from the end of one measurement to the start of the next measurement can be shortened, and the time for measuring moisture can be shortened.

Further, since the sealing mechanism hermetically separates the heating chamber from the main body, the remaining moisture in the main body is prevented from migrating to the heating chamber, and the measurement accuracy of the water content of the sample is improved.

〔Example〕

One embodiment of the present invention will be described below with reference to FIGS.

The vaporizer for a moisture measuring device according to the present invention is used, for example, in a part of the system example of the moisture measuring device shown in FIG. 11, and can be used in other systems.

In FIG. 11, (1) is a storage tank (sample supply source) for storing a granular material or the like. This storage tank (1) may be a drying hopper equipped with a blower and a heater, or may be a simple storage tank. It is. The material stored in the storage tank (1) is discharged downward through the discharge chute (2), and is introduced into a receiving portion such as a molding machine. A part of the material is sampled as a sample (M) from this path, and the sample (M) is transported via the transport pipe (3). The sampling is performed by a sampling device (4) having an arbitrary structure, and the material in the discharge chute (2) is transported by air (which may be dehumidified air or inert gas) from an air source (5) such as a blower or a compressor. 3) and then to the next step via the transport pipe (3).

The sample (M) pneumatically transported by the pneumatic force of the air source (5) through the transport pipe (3) is weighed by a weighing means (6) such as a load cell, and then is shot via an openable / closable damper (7). It is led to (8), and is led from the chute (8) to the next vaporizer (10). The weighing data is read by the processing unit (100).

As shown in FIGS. 1 to 11, the vaporizer (10) has two L-shaped brackets (1) on a base (11).
2) and (13) are fixed to face each other. One bracket (12) has a hole (12a) at the top,
A bush (14a) of a support (14) is fitted into the hole (12a) from the inside via a bush (12b) and a rulon (12c), and a rotary drive means (25) such as a rotary actuator is fitted into the bush (14a). ) Of the drive shaft (25a) is fixed.

The other bracket (13) has a height lower than that of the bracket (12), and a receiving cylinder portion (15a) protruding from the bracket (13) toward the bracket (12) is provided above the bracket (13). 15) are connected by bolts (16) or the like. A communication hole (15b) is formed horizontally inside the receiving cylinder (15a). Therefore, the bracket (13) and the cylinder (1
5) and the bracket (12) are fixed without rotating.

Bracket (12) and bracket (13) (receiving cylinder (1
5)), between the bush (12b) and the receiving cylinder portion (15a) of the receiving cylinder (15), the reversing body (20) and the reciprocating means (2
The rod (26) and the pipe (21) of 2) are rotatably supported around a horizontal axis. The reversing body (20) has a stepped cylindrical shape, has a space (20a) formed therein, and a communication port (20b) communicating with the space (20a) is opened in the periphery. This communication port (20b) can be turned vertically upward (FIG. 4) and vertically downward (FIG. 3). The stepped cylinder at the tip of the reversing body (20) is externally fitted to the cylinder (15a) of the cylinder (15) via a luron (17), and has an oil seal (18) on its outer periphery. Inverted body (2
It supports the rotation of 0).

The pipe (21) is a cylindrical body, and has a groove-shaped notch (21c) formed on the lower side (facing upward when inverted), and the base at the other end is fitted with the support (14). Groove (14
b) It is supported by being fitted inside.

In the notch (21c) of the pipe (21), a cylinder (23) serving as a reciprocating means vertically suspended between the lower side of the fitting groove (14b) of the support (14) and the lower side of the reversing body (20). The shaft bracket (24) is inserted to slide back and forth.

A rotation drive means (25) such as a rotary actuator for rotating the reversing body (20) is attached to the bracket (12), and a drive shaft (25) of the actuator (25) is mounted.
The support (14) and the pipe (21) are rotated through a), and the cylinder (23), the reversing body (20) and a boat described later are also rotated.

A rod (26) is fixed to the upper part of the shaft bracket (24), and the tip (26a) of the rod (26) always faces the space (20a) of the reversing body (20) via the bearing (27). Yes,
By driving the rodless cylinder (23), the shaft bracket (24) and the rod (26) are moved forward and backward, and the boat (32) provided on the tip side of the rod (26) is put in and out of the heating chamber (42). I have to do it.

The tip (26a) of the rod (26) is connected to a scraping member (30) serving as a bar-shaped or other arbitrary scraping mechanism, and the tip (30a) of the scraping member (30) is connected to the boat (3).
The sample (M) adhering into the storage chamber (33) is forcibly scraped off by moving back and forth in the storage chamber (33) from the base of 2).

The aforementioned pipe (21), cylinder (23), shaft bracket (24), rod (26) and scraping member (30) constitute a reciprocating means (22).

The boat (32) has a storage chamber (33) with an opening at the top (lower when inverted) for storing a sample (M) for moisture measurement, and a bottomed storage chamber (33). Communication port (20
b) and the inside of the heating chamber (42) heated by the heater (41), and the communication port (20b) is connected to the boat (3).
As described above, it can be inverted together with the reversing body (20) while communicating with the storage chamber (33) of 2). Also, a pin (34) is erected on the bottom (32a) of the boat (32), and the pin (34) is inserted into a guide groove (30b) formed below the tip (30a) of the scraping member (30). I'm facing. A spring (31) is attached between the base end of the scraping member (30) and the base end of the boat (32), and the urging force of the spring (31) causes the spring (31) shown in FIGS. As described above, the pin (34) is always locked at the tip of the guide groove (30b). This pin (3
The lock state between the 4) and the guide groove (30b) is the same even when the boat (32) advances to the heating chamber (42) (see FIG. 2). It moves back and forth between the space (20a) of (20) and the heating chamber (42). The sample (M) in the boat (32) advanced to the heating chamber (42) as shown in FIG. 2 is subjected to heat treatment, and then retreated as shown in FIG. The main body is inverted, and the used sample (M) in the boat (32) is discharged. The scraping mechanism (30) can be operated when the used sample (M) is discharged in the inverted state.

That is, as shown in FIG. 1, FIG. 2 and FIG. 4, the rotation center line (L) of the rotation drive means (25) and the rotation center line (l) of the boat (32) are eccentric. As shown in FIG. 3, when the boat (32) or the like is turned over, the front end surface (32b) of the boat (32) comes into contact with the rear end surface (15c) of the receiving cylinder (15), which is the fixed side, and the scraping mechanism ( 30) is the guide groove (30
By moving forward by the stroke b), the used sample (M) adhered to the boat (32) can be scraped off.
The stroke length of the scraping member (30) can be appropriately changed in design.

As shown in FIG. 2, when the boat (32) is moved to the heating chamber (42), the sealing mechanism (3)
According to 5), both are divided airtightly. The seal mechanism (35) includes a seal (35a) fitted on the tip of the reversing body (20) and a seal (35b) fitted on the outer periphery of the tip (26a) of the robot (26).

In the boat (32), the entirety or at least the storage room (33) is formed of a material having high releasability such as Teflon.

At least the main body parts such as the sample entrance (61) and the boat (32) are configured to be reversible by the rotation driving means (25), but a configuration that does not reverse can also be implemented.

In FIG. 4, a heating means (4) provided with a heater (41) and a heating chamber (42) is provided on the left side of the receiving cylinder (15) which is a fixed side.
0) is attached by the attachment plates (43) and (44). The front end (front end) of the heating chamber (42) is in communication with the titration cell (45).

In this embodiment, the titration cell (45) employs a coulometric method using a Karl Fischer reagent, and removes the moisture of the sample (M) heated in the heating chamber (42) together with the nitrogen gas into a conduit (46). It is passed through the titration cell (45), and an electrode is inserted into the titration cell (45) for electrolysis, and the change in the amount of electricity is read as the amount of water. It is needless to say that a configuration in which measurement is performed by a capacitance method or another method can be adopted.

A supply / discharge case (50) is fixed to the front upper surface of the reversing body (20) with bolts (51) or the like. This supply / discharge case (50)
Has a cylindrical space (52) inside, this space (52) communicates with the communication port (20b) of the reversing body (20) through the communication port (53), and the space (52) The container (60) communicates with the sample port (61). This sample port (6
1) is configured to face the lower end outlet of the chute (8), which is a means for supplying the sample (M), from below and to be inverted with the reversing body (20). This inversion is because the supply / discharge case (50) is fixed to the upper side of the inversion body (20) with bolts (51) and the like.

The supply / discharge container (60) has a cylindrical outer periphery and is configured to fit into the space (52) of the supply / discharge case (50). A sample port (61) is formed so as to be able to be accommodated, and the sample port (61) is in a forward rotation state (see a two-dot chain line in FIG. 1) and an inverted state in which the sample port (61 is downward) (see FIG. 1). (See the solid line in the figure). In addition, container for supply and discharge (60)
Can be reciprocated linearly in the space (52), and the sample port (61) can correspond to the communication port (20b). These rotational and linear reciprocating operations are performed by a driving means (62) such as a swing cylinder attached to the supply / discharge container (60). (63) is the rotation axis of the swing cylinder.

A purge port (15d) for an inert gas such as nitrogen gas communicating with the communication hole (15b) is formed in the receiving cylinder (15).
From the purge port (15d), the reversing body (20) and the heating chamber (42)
In the space between the supply and discharge case (50) and the supply and discharge container (60),
An inert gas such as dried nitrogen gas or dry air is introduced. An inert gas supply source (70) such as nitrogen gas (see FIG. 1) is connected to the purge port (15d).

As shown in FIG. 1, FIG. 7, FIG. 10, etc., the supply / discharge container (60) in an upright state from the opening (53) is provided in the supply / discharge case (50).
A gas discharge port (54) communicating with a communication hole (60b) formed in the bottom surface (60a) of the device is formed. A valve hole (56) communicating with the space (52) is formed below the gas discharge port (54), and a valve rod (58) constantly biased downward by a spring (57) in the valve hole (56). ) Is fitted. This valve stem (5
An exhaust passage (58a) as shown in FIG. 10 is formed in the lower part of 8), and communicates with the gas exhaust port (54) through the valve hole (56). A packing (59) that can be seated on a valve seat (56a) on the inner wall surface of the valve hole (56) is fitted to the shoulder of the valve stem (58).

Therefore, when replacing the inert gas such as nitrogen gas, the supply / discharge container (60) is driven by the driving means (swing cylinder) (62).
As a result, an inert gas such as nitrogen gas from the purge port (15d) is connected to the communication port (20b) through the communication port (15b) through the communication port (20b). The gas is discharged from the exhaust system (58a), the valve hole (56), and the gas discharge port (54) to the outside of the system via the hole (60b) (see FIGS. 1 and 10). At this time, the packing (59) is separated from the valve seat (56a). As a result, the supply / discharge container (6
The accuracy of the moisture measurement is improved by eliminating only the moisture of the sample by removing the moisture of the outside air entering the sample entrance / exit (61) of (0). Conversely, the supply / discharge container (60) is the second
As shown by the solid line in FIG. 7 and FIG. 7, in the reverse state, the bottom surface (60a) of the supply / discharge container (60) pushes the bottom of the valve rod (58) up against the urging force of the spring (57). The gasket (59) sits on the valve seat (56a) to close the gas outlet (54). At this time, no gas is exhausted.

On the other hand, when measuring the moisture content of the sample, the boat (32) containing the sample was moved by the reciprocating means (22) to the position indicated by the solid line in FIG.
The inert gas introduced from the purge port (15d) moves to the position of the boat (32) indicated by the phantom line in FIG. 4, and the inert gas introduced from the purge port (15d) and the seal (35a) on the reversing body (20) side and the rod (26) as shown in FIG. ) Side seal (35b), and is passed only through the communication hole (15b) and the heating chamber (42) of the receiving cylinder (15) which is kept airtight by the seal mechanism (35). The active gas is supplied to the titration cell (45) together with the moisture generated by vaporizing the sample heated in the heating chamber (42), so that the moisture can be measured in a dry environment and can be measured accurately.

In addition, the reversing body (20) is provided with a discharge detection sensor (28) so as to face the inside of the communication port (20b) of the reversing body (20) as shown in FIG. 1 and FIG. The sensor (28) is for confirming that the sample is discharged through the storage chamber (33) when the boat (32) and the reversing body (20) are reversed.

(80) shown in FIG. 3, FIG. 4 to FIG. 8, and FIG. 11 is a receiving tray for storing the used sample.

 The operation of the present embodiment will be described below.

The sample (M) to be measured is supplied from the chute (8) to the sample inlet / outlet (61) of the vaporizer (10) in a constant amount while being controlled by the measuring means (6) or the like. At that time, as shown in FIGS. 1 and 4, the supply / discharge container (60)
Is in the normal rotation position as indicated by the chain line. In other words, it is located above the center of the vaporizer (10) (the rotation center line (L) of the rotation driving means (25)) at the retreat position, the sample port (61) is facing upward, and the boat (32) is shown in FIG. And the storage room (33) of the boat (32) is also facing upward.
Then, when the sample (M) is discharged from the chute (8), the sample (M) is stored in the supply / discharge container (60) indicated by the chain line in FIG.

Thereafter, the supply / discharge container (60) is advanced by the driving means (62) to the position indicated by the solid line in FIG. 1, and is reversed as shown by the solid line in FIG.

It is to be noted that the nitrogen gas is purged before the reversal and the moisture in the outside air inside the sample inlet / outlet (61) is removed, so that the measurement can be performed with very high accuracy. The inside of the reversing body (20) and the heating chamber (42) are sealed, and the sample is placed in the boat (32) through the port (53) and the communication port (20b) by reversing the supply / discharge container (60). (See FIG. 4).

Next, as shown in FIG. 2, the rod (26) moves forward by the reciprocating means (22) comprising the cylinder (23), and the boat (3)
2) advances into the heating chamber (42) while holding the sample as shown by the solid line in FIG. 2 (the chain line in FIG. 4). When the inside of the heating chamber (42) is heated by the heater (41), the water contained in the sample evaporates and is introduced into the titration cell (45) together with the nitrogen gas. Based on this, the moisture content of the sample is measured, and the moisture content is calculated through the arithmetic processing unit (100) in relation to the measured value.
Is displayed.

Thereafter, the boat (32) is moved backward from the chain line position in FIG. 4 to the solid line position. This boat (32) has a communication port (20
The operation is started by the rotation drive means (25) such as a rotary actuator when the value coincides with b). The rotation driving means (25) inverts the reversing body (20), the support (14), and the supply / discharge case (50). This allows the boat (3
2) The supply / discharge case (50) and the supply / discharge container (60) are inverted as shown in FIG. By reversing, the sample (waste accurately) in the boat (32) is put into the supply / discharge container (60) through the communication port (20b) and the communication port (53). At this time, the sample welded in the boat (32) can be forcibly scraped off by the scraping mechanism (30). This container (6
0) is further retracted and inverted, whereby the used sample is discharged from the sample inlet / outlet (61) of the supply / discharge container (60) to the lower receiving tray (80) as automatic droplets. The discharge detection sensor (28) is effective in confirming this discharge status. When all this is done, the inversion is
Switch to normal rotation.

By repeating the above-mentioned operation, the measurement of the water content of the sample and the discharge of the sample after use can be performed automatically and continuously and quickly.

[Effect of the invention]

According to this invention, (1) Since the board has a scraping mechanism for forcibly scraping off the attached sample or the like, it is possible to easily and quickly remove even the sample firmly attached to the inner wall surface of the boat. it can.

In addition, the standby time from the end of one determination to the start of the next measurement can be shortened, and the time for measuring moisture can be shortened.

The above effect can be obtained, for example, by configuring at least the sample entrance / exit and the main body such as a boat so as to be reversible by the rotation driving means as in claim (3). The boat has a storage chamber with an open top, and the scraping mechanism is fixed to a tip of a rod that also serves as a part of a reciprocating means, and is configured as a scraping member that moves back and forth in the boat. As described in (6), the rotation center line of the rotation driving means and the rotation center line of the boat are eccentric, and when the main body of the boat or the like is inverted, the front end face of the boat is located on the rear end face of the fixed-side receiving cylinder. This can be achieved even more effectively by configuring the scraping mechanism to be able to move forward while being in contact.

(2) As described in claim (5), the heating chamber and the main body are
When the boat is moved to the heating chamber, the seal mechanism separates the two from each other in an airtight manner, so that the sealing mechanism partitions the heating chamber from the main body in an airtight manner. The transfer to the chamber is prevented, and the measurement accuracy of the water content of the sample is improved.

(3) As described in claim (2), if the entire boat or at least the sample storage chamber is formed of a material having a high releasability such as Teflon, the releasability is improved, and the sample adheres to the inner wall of the boat. There are advantages.

[Brief description of the drawings]

The figures each show an embodiment of the present invention. FIG. 1 is a longitudinal sectional view of a main part of the boat in a forward rotation position in a forward rotation state, FIG. 2 is a longitudinal sectional view of a main part of a boat in a forward movement position in a normal rotation state, and FIG. 4 is an overall longitudinal sectional view of the boat in the forward position in a forward rotation state, FIG. 5 is a plan view of FIG. 4, and FIG. 6 is a VI-VI of FIG. 7 is a cross-sectional view along the line VII-VII in FIG. 4, FIG. 8 is a side view along the line VIII-VIII in FIG. 4, and FIG. 9 is a line along the line IX-IX in FIG. FIG. 10 is a longitudinal sectional view of the vicinity of the valve stem when the valve stem is opened, and FIG. 11 is an overall Silte diagram showing an application example of the present invention. (10) ... vaporizer, (14) ... support, (15) ... cylinder, (15b) ... communication hole, (15d) ... purge port, (2
0) Inverted body, (20b) ... communication port, (22) ... reciprocating means, (25) ... rotational drive means, (30) ... scraping mechanism (scraping member), (32) …… boat, (33) ……
Storage room, (35) ... sealing mechanism, (40) ... heating means,
(42) ... heating chamber, (45) ... titration cell, (50) ... supply / discharge case, (53) ... port, (54) ... gas outlet,
(58) Valve stem, (60) Supply / discharge container, (61) Sample inlet / outlet, (62) Driving means of supply / discharge container, (L)
... A rotation center line of the rotation drive means, (l) a boat rotation center line, (M) a sample.

Claims (6)

(57) [Scope of request for utility model registration] 1. A sample (M) such as a granular material taken in from a sample port (61) is accommodated in a boat (32), and the boat (32) is moved by a reciprocating means (22) into a heating chamber (42). Into the titration cell (45) together with nitrogen gas while introducing moisture generated when the sample (M) is heated in the heating chamber (42). A vaporizer for a moisture measuring device for discharging the sample (M) after retreating, and forcibly scraping off the sample (M) attached to the boat (32). A vaporizer for a moisture measuring device, comprising a mechanism (30). 2. A vaporizer for a moisture measuring apparatus according to claim 1, wherein the boat (32) is entirely or at least the sample storage chamber (33) is made of a material having a high releasability such as Teflon. 3. The apparatus according to claim 1, wherein at least the main body of the sample entrance / exit (61) and the boat (32) is configured to be reversible by the rotation driving means (25). Vaporizer for moisture measurement device. 4. A boat (32) having a storage room (3
3) wherein the scraping mechanism (30) is fixed to the tip of a rod (26) also serving as a part of the reciprocating means (22), and is a scraping member that moves back and forth in the boat (32). Item 14. A vaporizer for a moisture measuring device according to any one of items (1) to (3). 5. The heating chamber (42) and the main body are connected to a boat (32).
The moisture according to any one of claims (1) to (4), wherein when the water is moved to the heating chamber (42), the two are hermetically divided by a sealing mechanism (35). Vaporizer for measuring devices. 6. The rotation center line (L) of the rotation drive means (25) and the rotation center line (l) of the boat (32) are eccentric, and the boat (32) is turned when the main body of the boat (32) is turned over. (3) to (5), wherein the front end surface (32b) of the first member abuts against the rear end surface (15c) of the fixed receiving cylinder (15), and the scraping mechanism (30) is capable of moving forward. Item 14. A vaporizer for a moisture measuring device according to any one of the above items.