JP2860823B2 - Moisture vaporizer in moisture measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for measuring a water content by sampling a granular material such as a resin material, a ceramic material, a processed food material, a pharmaceutical material, and a grain. The present invention relates to a moisture vaporizer configured in the moisture analyzer.

[Conventional technology]

In general, if the moisture content of the resin material supplied to the molding machine is inappropriate, this may cause defects such as silver lines and voids in the molded product. For this reason, keeping the moisture content of the resin material constant is regarded as the most important problem for maintaining the quality of the resin molded product. For this reason, it is customary to dry the resin material by passing it through a hopper dryer or the like before supplying it to the molding machine.

However, in the method of drying the material with a hopper dryer, before the resin material is passed through the dryer, the kraft bag or the flexible container is opened, and the air is stored in a silo or an intermediate stage tank for a certain period of time. In many cases, the hopper dryer is dried by setting a predetermined heating temperature and a predetermined heating time based on a resin material having a predicted moisture content. Such a conventional resin drying method has a room for improvement in labor saving.

On the other hand, as a method for analyzing and measuring the moisture content of a resin material, a titration analysis method using a Karl Fischer reagent has been conventionally known. Moisture measuring devices that use a method or an absorptiometric method have also been developed, and if such a device is used, measurement can be performed with high accuracy.

For example, a coulometric moisture meter shown in FIGS. 6 and 7 is known. This apparatus is configured by connecting a moisture measurement analyzer (A) for performing titration analysis using a Karl Fischer reagent using a coulometric titration method to a heating chamber (C) for heating a material such as a granular material. In the heating chamber (C) connected to the moisture measurement analyzer (A) via the conduit (B), the powder material (J) placed on the boat (pan) (H) is loaded with an automatic sample loader mechanism or Moisture generated when the granular material (J) is heated and moved in the heating chamber (C) by manual movement and stored in the heating chamber (C)
Analyzer (A) together with the nitrogen gas supplied into the chamber
And perform a titration analysis with a Karl Fischer reagent using an electrolytic titration method, and display the analysis measurement result.

[Problems to be solved by the invention]

However, in the above-described conventional moisture measuring device, when the sampled powdery or granular material (J) is charged, the boat insertion tube (D) having one end of the heating chamber (C) thinned and extended.
The opening (E) of the sample is opened, the inserted boat (H) is pushed into the sample input section (F) with the protruding rod (P), and then the cap (G) at the sample input section (F) is removed. , The granular material (J) sampled by a sampler (not shown),
It is necessary to put on the boat (H) housed in the boat insertion tube (D). At this time, the charging device (not shown) housing the sampled granular material (J) is attached to the cap (G). At this time, the purge valve (N) is opened by aligning the cap (G) with the hole formed in the charging device to form a discharge port, and then the supply pipe (from the cylinder (L)) is formed. R), the pressurized nitrogen gas fed and dried through the drying chamber (M) must be replaced and released to prevent air from entering the chamber.

After the heat treatment is completed, the particulate material (J) placed on the boat (H) is moved to the insertion port (E) of the boat insertion pipe (D) by an autoloader mechanism (K) and discharged. Need to be done. It is troublesome to repeat the above operation for each sampled granular material.

Under such circumstances, in the above-described moisture measuring device, for example, the cap (G) is opened by a human hand each time, and the material is put into the boat (H). The work of removing the lid of the insertion opening (E) of (D) by a human hand and taking out the material in the boat (H) to the outside was required, and manual work was always required. For this reason, it is customary for specialized inspectors to perform quality inspections exclusively in testing laboratories, etc. It was almost impossible to perform moisture measurement by automation.

The present invention has been developed in view of the above circumstances, and an object of the present invention is to sample a predetermined amount of a sample and automatically load the sample into a dried heating chamber suitable for moisture measurement, and to heat the sample. An object of the present invention is to enable a sample after and after a measurement to be automatically discharged as a waste product. In addition, moisture measurement is performed quickly and accurately.

Another object is to ensure that the intake and discharge functions are always performed reliably and smoothly.

[Means for solving the problem]

In order to solve the above-mentioned problems, the invention according to claim (1) has a space formed therein and a communication port communicating with the space is opened in a peripheral portion, and the communication port faces upward and downward. A reversing body rotatably supported on the fixed side so that the rotating body can be changed, a rotation driving means for rotating the reversing body, and a heating chamber inside so that the heating chamber is heated by the heating means. A heating unit provided on the fixed side so as to communicate with the internal space of the reversing body and the moisture measuring device, and a container having an inlet opening for accommodating a sample for moisture measurement. A tray that can reciprocate between a position corresponding to a communication port in the reversing body and the heating chamber, and a reversible reciprocating tray reciprocates the reversing body together with the reversing body while the inlet opening corresponds to the communication port. Means of transportation and empty inside A supply / discharge case in which the space communicates with the communication port of the reversing body and the sample entrance / exit communicating with the space faces the means for supplying the sample from below so as to be reversed with the reversing body; and A supply / discharge container capable of accommodating a sample, reciprocating linearly in the supply / discharge case, and independently rotatable; and driving means for causing the supply / discharge container to perform a linear reciprocating operation and a rotating operation. And

According to the invention of claim (2), an inert gas such as nitrogen gas or dry air dried at the time of measuring the moisture of the sample is introduced into at least the space of the reversing body and the heating chamber in a pressurized state, The introduced inert gas is configured to be supplied to a moisture meter together with moisture generated by vaporization of the sample heated in the heating chamber.

According to the invention of claim (3), when the supply / discharge container is replaced with an inert gas such as dried nitrogen gas or dry air in the receiving port, the inert gas is introduced into the supply / drainage container. It is configured to discharge to

The invention according to claim (4) is characterized in that the reversing body is provided with knocking means for knocking the tray from outside and discharging the sample contained therein when the tray is inverted.

In the invention according to claim (5), a discharge detection sensor is provided so as to face a passage of a sample discharged when the pan is inverted.

The invention according to claim (6) is provided with a weighing means for weighing the sample whose moisture content is to be measured, in addition to the pneumatic transport means for pneumatically transporting the sample from the sample supply source by the transport pipe.

The moisture meter used in the moisture vaporizer of the present invention is not only a coulometric method and a capacity method using the above-described Karl Fischer reagent, but also the spectrophotometric method described in Japanese Patent Application No. 63-39291. And any other.

[Action]

A reversing body in which a space is formed inside and a communication port communicating with this space is opened in the periphery and the communication port is rotatably supported on a fixed side so that the communication port can be turned upward and downward, A rotation driving means for rotating the reversing body, and a heating chamber inside, and the heating chamber is heated by the heating means and fixed so as to communicate with the internal space of the reversing body and the moisture meter. One side is a container with an inlet opening so that a sample for moisture measurement can be accommodated, and can be reciprocated between the position corresponding to the communication port in the inverted body and the heating chamber provided on the side A tray in which the inlet opening is adapted to be reversible together with the reversing body while corresponding to the communication port, reciprocating means for reciprocating the pan, and a space inside, and this space is provided in the communication port of the reversing body. Communicate with the same sky A sample supply / discharge case in which a sample entrance / exit leading to a sample supply means faces from below to a sample supply means and is configured to be inverted with a reversing body, and linearly reciprocates in the supply / discharge case in which the sample can be accommodated. The supply / discharge container which can move and can rotate independently, and a drive means for causing the supply / discharge container to perform a linear reciprocating operation and a rotating operation, so that the supply / discharge container The sample is put into the pan by the advance operation and the reversing operation of, and the sample is put into the heating chamber by the advance operation of the pan to receive the heat treatment, and everything from the taking in to the heating is automatically performed. In addition, the tray is retracted, the tray is inverted, and the sample introduction path is also inverted and converted to a discharge path, so that the discharge is automatically performed.

While the sample is being heated in the heating chamber, the moisture vaporized in the heating chamber is sent to the moisture measuring device together with the introduced inert gas.

At least in the space of the reversing body and the heating chamber, an inert gas such as nitrogen gas or dry air dried at the time of moisture measurement of the sample is introduced, and the introduced inert gas is removed from the sample heated in the heating chamber. A predetermined moisture measurement can be performed by supplying the moisture to the moisture meter together with the moisture generated by vaporization.

When the supply / discharge container is configured to introduce and discharge the inert gas to the outside when the inert gas such as dried nitrogen gas or dry air is replaced in the receiving port, the sample Eliminates the intrusion of external moisture into the water and makes the moisture measurement more accurate.

If the reversing body is provided with a knocking means for tapping the tray from the outside when the tray is inverted and discharging the sample contained therein to the outside, the used sample does not remain in the tray and the next sample is removed. Always get inside the saucer.

If the discharge detection sensor is provided so as to face the passage of the sample discharged when the pan is inverted, it can be easily confirmed externally that the sample in the pan is discharged,
Clogging can also be dealt with.

In addition to the pneumatic transportation means for pneumatically transporting the sample from the sample supply source by the transport pipe, if a measuring means for measuring the sample whose moisture content is to be measured is also provided, an appropriate amount of material (sample) is supplied from the material supply source. A predetermined amount of sample is automatically fed to the heating chamber from the sample feeding path of the moisture vaporizer of the present invention by sampling, and the moisture vaporized in the heating chamber is sent to the moisture meter,
The used sample is automatically inverted and discharged, and a series of these operations are automatically performed.

〔Example〕

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

As shown in the system diagram of the moisture measuring device in FIG. 5, the moisture measuring device includes a storage tank (sample supply source) (1) for storing the granular material. This storage tank (1) may be a drying hopper provided with a blower and a heater, or may be a simple storage tank. (2) is a cylindrical discharge chute, which is connected to the lower side of the storage tank (1) in a communicating manner. 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. From this path, a part of the material is sampled as a sample, and the sample is transported through the transport pipe (3). Sampling is performed by a sampling device (10). Although the illustration of the sampling device (10) is omitted,
A rotating disk having a sample introduction hole is provided as a main part, and the sample introduction hole is rotated to face the inside of the discharge chute (2), so that the material in the discharge chute (2) is fed out by a predetermined amount, and the blower is blown out. Air is sent into the transport pipe (3) by air (or dehumidified air or inert gas) from an air source (11) such as a compressor or a compressor, and is sent to the next step through the transport pipe (3). Here, the transport pipe (3), the air source (11), and the like constitute a pneumatic transport means. In addition,
The sampling device (10) is not limited to the configuration including the discharge chute (2) and the rotating disk as described above, and a sampling nozzle is inserted into the storage tank (1) so as to be freely inserted and removed, and the storage tank (1) is drawn by a suction air source. A configuration in which a part of the material inside is taken out as a sample may be used, and the design can be changed as appropriate.

The sample pneumatically transported through the transport pipe (3) is weighed by a weighing means (6) such as a load cell, and then guided to a chute (5) through a control damper (4) that is opened, and the chute (5). ) Through the next moisture vaporizer (3
0). The weighing data is read by the processing unit (100).

By the way, the water vaporizer (30) is shown in FIGS.
As shown in the figure, the base on the lower side is a common base (31)
And two L-shaped brackets (32) and (33) are fixed on the base (31) so as to face each other. One bracket (32) has a hole (32a) in the upper part and a receiving plate (32b) on the opposite side.
It has. Hole (33a) on the other bracket (33)
The receiving cylinder (33b) protrudes in the opposite direction through the hole (33a). Both these brackets (32),
The reversing body (35) and the tube (36) are supported between the (33) via a receiving plate (32b) and a receiving cylinder (33b) so as to be rotatable around a horizontal axis. The reversing body (35) has a stepped cylindrical shape, has a space (35a) formed therein, and a communication port (35b) communicating with the space (35a) is opened in the periphery. This communication port (35b) can be turned between vertically upward and vertically downward. An oil seal (37) and a rulon (38) are interposed between the reversing body (35) and the bracket (33) to support the rotation of the reversing body (35) while maintaining a sealed state. I have.
The protruding end of the reversing body (35) is connected to the protruding end of the tube (36).

The tube (36) is a cylindrical body, and has a groove-shaped notch (36a) formed on the lower side (facing upward at the time of inversion), and the base at the other end is connected to the outer peripheral ruler (39). It is supported by being fitted into the receiving plate (32b). A bushing (40) is fitted into the base of this tube (36),
The bushing (40) is connected to the tube (36). The bracket (32) has a rotary actuator (rotation driving means for rotating the reversing body (35)) (4
1) is mounted, the actuator (41) has a shaft (41a) extending through the hole (32a) of the bracket (32), and the bushing (40) and the tube (36) are coaxially (41a). When rotated, the reversing body (35) is also rotated. A bearing (43) and an oil seal (44) are provided in the protruding end of the reversing body (35), through which the rod (45) can reciprocate. The rod (45) is a rodless cylinder (reciprocating means for reciprocating the pan (50)) (46) and a shaft bracket (47) mounted between the tube (36) and the reversing body (35). And is driven by A pan (50) is attached to the tip of the rod (45). The receiving pan (50) is a container having an inlet opening (50a) and a bottom (50b) at the upper side (the lower side at the time of inversion) so as to accommodate a sample for moisture measurement, and a communication port in the inverting body (35). It is possible to reciprocate between the position corresponding to (35b) and the inside of the heating chamber (61) so that the inlet opening (50a) can be inverted together with the reversing body (35) while corresponding to the communication port (35b). Has become.

The heating section (60) has a heating chamber (61) inside, and the heating chamber (61) is heated by a heating means, which is a heater (62). (35
It is provided on the fixed side so as to communicate with a) and the moisture meter (70). The heating chamber (61) is made of a glass tube.

(80) is a supply / discharge case. The case (80) has a cylindrical space (81) inside, and this space (81) is an opening (82).
The sample inlet / outlet (83) communicating with the communication port (35b) of the reversing body (35) through the space and the space (81) faces the lower end outlet of the chute (5) serving as a means for supplying the sample from below. It is configured to be inverted together with the inverted body (35). This reversal is achieved by using a flange (84) provided on both sides of the lower part of the supply / discharge case (80).
It is done by being fixed on the upper side of the.

(90) is a supply / discharge container whose outer periphery is cylindrical and fits in the space (81), and the container (90) is provided with a receiving port (90a) so as to be able to store a sample. With the socket (9
0a) is configured to be in a forward rotation state facing upward and a reverse state facing downward. In addition, supply and discharge container (90)
Can move back and forth linearly in the space (81), and the receiving port (90a) can correspond to the sample port (83) and the communication port (35b). These rotational and linear reciprocating operations are performed by a swing cylinder (elevating means) (91) attached to the supply / discharge container (90).

An inert gas such as dried nitrogen gas or dry air is introduced into the space between the reversing body (35), the heating chamber (61), the supply / discharge case (80), and the supply / discharge container (90). It is supposed to be. Therefore, a purge port (51) for an inert gas such as a nitrogen gas is provided so as to reach near the tip of the reversing body (35) when the rod (45) is retracted. An inert gas supply source (58) such as nitrogen gas is connected to the purge port (51). In the supply / discharge case (80), the entrance (82)
A bypass (85) is provided through the wall of the case (80), and a through hole (90b) provided in the supply / discharge container (90) is provided at the outlet of the bypass passage (85). At the time of advancement.

Therefore, when replacing the inert gas such as nitrogen gas, the supply / discharge container (90) is driven by the driving means (swing cylinder) (91).
And the inert gas such as nitrogen gas from the purge port (51) is supplied and discharged from the communication port (35b) through the port (82), the bypass path (85), and the through hole (90b). (90), and is discharged out of the system through the gas discharge port (80a) of the supply / discharge case (80). As a result, the moisture in the outside air entering the receptacle (90a) of the supply / discharge container (90) is excluded so that only the moisture of the sample can be measured, thereby improving the accuracy of the moisture measurement.

On the other hand, at the time of measuring the moisture content of the sample, the pan (50) containing the sample is moved by the reciprocating means (46) to the position of the pan (50) indicated by the imaginary line in FIG. The active gas is passed through the space (35a) of the reversal body (35) and the heating chamber (61), and the introduced inert gas is vaporized from the sample heated in the heating chamber (61) together with water generated by vaporization. The moisture is supplied to the moisture meter (70), and the moisture can be measured in a dry environment and can be measured with high accuracy.

The reversing body (35) is provided with a discharge detection sensor (52) so as to face the inside of the communication port (35b) of the reversing body (35). The sensor (52) is for confirming that the sample is discharged through the inlet opening (50a) when the pan (50) and the reversing body (35) are reversed.

Further, a cylinder bracket (53) is fitted into the inverted body (35) through a hole formed in the inverted body (35) so as to be located on the bottom side of the retracted tray (50). A hammer (55) is fitted into the bracket (53) via a spring (54) so as to advance and retreat in the vertical direction. The hammer (55) is a jig cylinder (56) and the spring (54).
By hitting the bottom (50b) of the pan (50) at the time of reversal by the action of (1), the sample as the content is discharged in the direction of the communication port (35b). Spring (54) and jig cylinder (56)
Etc. constitute knocking means.

In the embodiment, in addition to the pneumatic transportation means, a measurement means (6) for measuring a sample whose moisture content is to be measured is also provided.

A sample is supplied to the water vaporizer (30) from the chute (5) in a fixed amount. This is controlled by a control damper (4) and the like. At that time, the moisture vaporizer (3
0), as shown in FIG. 1, the supply / drainage container (90) is located above the center of the moisture vaporizer (30) and recedes;
The receiving port (90a) is facing upward, and the receiving tray (50) is also retracted, so that the inlet opening (50a) is facing upward. When the sample is discharged from the chute (5), the sample entrance (8
It is stored in the supply / discharge container (90) through 3). After that, the supply / discharge container (90) is pushed forward by the swing cylinder (91), is inverted, and then remains inverted. It should be noted that the nitrogen gas is purged before the reversal and the moisture in the outside air inside the receiving port (90a) is removed, so that the measurement can be performed with very high accuracy. The inside of the reversing body (35) and the heating chamber (61) are in a sealed state, and by inversion, the sample is passed through the port (82) and the communication port (35b) and the pan (5
0). Thereafter, the rod (45) advances by the cylinder (46), and the pan (50) advances into the heating chamber (61) with the sample contained therein. When the inside of the heating chamber (61) is heated by the heater (62), the moisture contained in the sample evaporates and is introduced into the moisture meter (70) 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 saucer (50) is retracted. The saucer (5
When (0) coincides with the communication port (35b), the operation is started by the rotary actuator (41). In the actuator (41), the reversing body (35) is reversed together with the tube (36). Thereby, the receiving tray (50), the knocking means, the supply / discharge case (80), and the supply / discharge container (90) are inverted.
This inverted state is shown in FIG. By reversing, the sample (waste accurately) in the receiving pan (50) is put into the supply / discharge container (90) through the communication port (35b) and the communication port (82). The supply / discharge container (90) is retracted and inverted, whereby the sample is discharged downward from the receiving port (90a) of the supply / discharge container (90). The sample in the saucer (50) is reliably discharged by being hit from the bottom with the hammer (55) of the knocking means. Emission detection sensor (52)
Is effective in confirming this emission status. When all of this is completed, the reversal is switched to the normal rotation state.

〔The invention's effect〕

As understood from the above description, according to the moisture vaporization device in the moisture measurement device according to the present invention, before the reversal, the sample is put into the pan by the advancing operation and the reversing operation of the supply / discharge container. The receiving tray is moved into the heating chamber by the advancing operation to receive the heating process, and the entire process from taking in to heating is automatically performed. In addition, the tray is retracted, the tray is inverted, and the previous sample introduction path is also inverted and converted to a discharge path, so that the discharge is automatically performed. As a result, not only can a predetermined amount of the sample be sampled and automatically taken into a dried heating chamber suitable for moisture measurement, but also the heated sample can be automatically discharged as a waste product. Thus, moisture measurement can be performed quickly and accurately.

According to the invention described in claim (3), when the supply / discharge container is replaced with an inert gas such as nitrogen gas into the receiving port,
If the inert gas is introduced and discharged to the outside of the system, moisture in the sample can be measured only by removing the moisture of the outside air that has entered the inlet of the supply / discharge container, and the moisture measurement can be performed. Accuracy can be improved.

According to the invention described in claim (4), the inverted body is provided with a knocking means for knocking the tray from outside and discharging the sample contained in the tray to the outside when the tray is turned over. The finished sample does not remain in the pan and the next sample always enters the pan.

According to the invention described in claim (5), the discharge detection sensor is provided so as to face the path of the sample discharged when the tray is inverted, so that the sample in the tray is discharged. It can be easily checked outside and troubles such as clogging can be dealt with immediately.

According to the invention described in claim (6), in addition to the pneumatic transport means for pneumatically transporting the sample from the sample supply source by the transport pipe, a measuring means for measuring the sample whose moisture content is to be measured is also provided. As described above, as described above, not only is a predetermined amount of sample automatically sent from the material supply source to the moisture vaporizer, but also the sample after measurement, heating, feeding of vaporized moisture to the moisture meter, and spent A series of operations such as the discharge of waste can be automatically performed.

As a result, the intake and discharge functions are always performed reliably and smoothly.

[Brief description of the drawings]

FIG. 1 is a sectional view of a normal rotation state showing one embodiment of the present invention,
2 is a plan view of the apparatus, FIG. 3 is a half sectional view of the apparatus of FIG. 1 viewed from the left side, FIG. 4 is a sectional view showing an inverted state, and FIG. FIG. FIG. 6 is a perspective view of a conventional example, and FIG. 7 is a block diagram showing the principle of FIG. (1) ... storage tank (sample supply source), (3) ... transport pipe,
(30)… Moisture vaporizer, (35)… Reversed body, (35a)
... space, (35b) ... communication port, (41) ... rotary actuator (rotation driving means), (46) ... cylinder (reciprocating means), (50) ... pan, (50a) ... entrance Opening (50b) Bottom (51) Inert gas purge port (52) Discharge detection sensor (54) (55)
(56) Knocking means (60) Heating unit (61)
…… Heating room, (62) …… Heater (heating means), (70)
…… Moisture meter, (80) …… Supply / discharge case, (81) ……
Space, (83) ... Sample entrance, (90) ... Supply / discharge container,
(90a) ... receptacle, (91) ... swing cylinder (drive means).

Claims (6)

(57) [Claims] 1. A space is formed inside and a communication port (35b) generated in this space is opened in a peripheral portion, and the communication port (35b) is fixed to a fixed side so that the direction can be changed between upward and downward. A reversing body (35) rotatably supported,
Rotation driving means (4) for rotating this reversing body (35)
1) and a heating chamber (61), the heating chamber (61) being heated by a heating means (62), and the internal space of the reversing body (35) and a moisture meter (70) One of the heating unit (60) provided on the fixed side so as to communicate with the other, and one of the inlet opening (50) so as to accommodate a sample for moisture measurement.
Communication container (35b) inside inverted body (35)
And the heating chamber (61) can be reciprocated, and the inlet opening (50a) can be inverted together with the reversing body (35) while corresponding to the communication port (35b). Pan (50) and reciprocating means (46) for reciprocating pan (50)
And a space inside thereof, which communicates with the communication port (35b) of the reversing body (35), and the sample port (83) communicating with the space faces the means for supplying the sample from below. A supply / discharge case (80) which is turned over together with (35); and a supply / removal case capable of accommodating the sample, reciprocating linearly in the supply / discharge case (80) and independently rotating. A moisture vaporizer in a moisture measuring device comprising: a discharge container (90); and a driving means (91) for causing the supply / discharge container (90) to perform a linear reciprocating operation and a rotating operation. 2. A reversing body (35) and a heating chamber (6)
An inert gas such as nitrogen gas is introduced into the space of 1) when measuring the moisture of the sample, and the introduced inert gas is vaporized from the sample heated in the heating chamber (61) together with the moisture generated. The moisture vaporizer in the moisture analyzer according to claim 1, wherein the moisture vaporizer is configured to supply the moisture to the moisture meter (70). 3. The supply / discharge container (90) is configured such that when an inert gas such as nitrogen gas is replaced into its receiving port (90a), the inert gas is introduced and discharged outside the system. The moisture vaporizer in the moisture measuring device according to claim 1 or 2, wherein: 4. The reversing body (35) further includes a knocking means for knocking the tray (50) from the outside when the tray (50) is inverted and discharging the sample contained in the inside to the outside. A moisture vaporizer in the moisture meter according to any one of (1) to (3). 5. A discharge detecting sensor (52) is provided so as to face a passage of a sample discharged when the tray (50) is inverted. A moisture vaporizer in the moisture analyzer according to any one of the above. 6. A weighing means (6) for weighing a sample whose moisture content is to be measured, in addition to a pneumatic transport means for pneumatically transporting a sample from a sample supply source (1) by a transport pipe (3). A moisture vaporizer in the moisture measuring device according to any one of claims (1) to (5).