JPS6319302Y2 - - Google Patents

Description

[Detailed explanation of the idea]

This invention relates to an apparatus for producing glass beads used for fluorescent X-ray analysis. Recently, when performing fluorescent X-ray analysis of various oxides such as iron ore other than steel, slag, cement glass, and scale, the conventional briquetting method of finely pulverizing and press molding has been used as a sample preparation method for powder samples. On behalf of
The glass bead method, which creates homogeneous glass disks (glass beads) by adding a melting agent to a sample and heating it to melt it, then cooling the entire melting crucible without injecting the melt into a mold or transferring the melt, is attracting attention. It started to be done. However, in conventional glass bead samplers, a platinum crucible containing a sample is melted by placing it in an electric resistance heating furnace or a high frequency heating furnace, then taking it out using a gripper, and manually stirring the molten sample in the platinum crucible. Methods such as casting into a graphite mold, or stirring by shaking a platinum crucible up and down electrically instead of stirring manually, were used, but in either method, when casting into a graphite mold, the molten metal However, since it cannot be automatically stirred, homogeneous glass beads cannot be obtained and air bubbles remain inside the glass beads, and since slow cooling is difficult, the glass beads tend to crack during cooling. In addition, the surface of the graphite mold becomes rough at high temperatures, and the surface of the glass bead (the surface in contact with the graphite) often does not finish smoothly. Furthermore, high-frequency heating furnaces require government procedures for installation and have the disadvantage of being expensive. Furthermore, the method of stirring the platinum crucible by shaking it up and down may cause the molten sample to scatter, the stirring may not be sufficient and homogeneous glass beads cannot be formed, air bubbles may remain in the glass bead, cracks may easily occur, and efficiency may be reduced. It had some drawbacks, such as not being accurate. The present invention was devised to eliminate such drawbacks of the conventional system, and one embodiment thereof will be described below with reference to FIGS. 1 to 4. Reference numeral 1 denotes a base, which is composed of a bottom part 2 and left and right vertical parts 3 and 4, and bearings 5 and 6 are mounted on the left and right vertical parts 3 and 4.
is provided. Reference numeral 7 denotes a heating furnace body in the shape of a rectangular parallelepiped, and horizontal shafts 10 and 11 protruding from the center portions of left and right walls 8 and 9 are rotatably supported by the bearings 5 and 6, and one horizontal shaft 11 is rotatably supported by the bearings 5 and 6. This bearing 6
The worm wheel 12 is fitted and fixed on the extension. A horizontal worm shaft 15 extending in the front-rear direction is rotatably supported on the vertical portion 4 of the base 1 via a bearing 13, and a worm 16 fitted and fixed to the worm shaft 15 meshes with the worm wheel 12. A handle 17 is attached to the front end of the worm shaft 15. Therefore, handle 17
By turning the handle 17, the furnace body 7 can be rotated to an arbitrary tilted position, and by stopping the handle 17, the furnace body 7 can be held stopped at an arbitrary position. That is, worm wheel 1
2, worm 16, worm shaft 15, handle 1
7 constitutes a manual tilting device 14. The heating furnace body 7 has electrical resistance heating elements 18 disposed at important points in the furnace, and the six walls surrounding the furnace chamber 19 are made of highly insulating material, and the front wall can be opened and closed. It serves as a furnace lid 20, and when opened, the furnace chamber 19
It is possible to easily maintain and manage the furnace and take out and take out crucibles, etc., and when it is closed, the furnace chamber 19
It is manufactured to provide sufficient insulation inside and out. A suspension support frame 21 is suspended and fixed below the furnace body 7,
Further, the lower part of the vertical shaft 26, which is rotatably supported by shaft supports 24 and 25 provided on the upper cross beam 22 and the lower cross beam 23 that constitute the suspension support frame 21, is connected to the large gear 2.
It is connected to a known variable speed electric drive device 28 including 7, and is configured to provide an arbitrary rotational speed (for example, 1 r.pm). In addition, in the furnace chamber 19, a rotary table 31 having a plurality of engagement parts 30 for placing the crucibles 29 arranged in a planetary manner passes the center of the lower surface of the rotary table 31 through the center of the furnace bottom 32, and moves upward into the furnace chamber 19. The vertical shaft 26 is engaged with and placed on the upper end of the vertical shaft 26 that protrudes in the direction. Note that 33 is a temperature sensor, and 34 is a temperature control panel. The tilted rotation stirring type glass bead manufacturing device devised has the above-mentioned structure, and when this device is used, the temperature of the furnace chamber 19 is controlled by the electrical resistance heating element 18 to melt various oxides. The sample and melting agent are placed in the platinum crucible 29 and placed on the plurality of engaging portions 30 on the rotary table 31. Next, the rotary table 31 is moved to the variable speed electric drive device 2.
8 for several minutes in a horizontal state, the furnace body 7 is rotated by operating the handle 17 for tilting the furnace body while continuing to rotate the rotary table 28.
Tilt it between 30° and 60°. When melting and heating is performed for a certain period of time in this state, the molten sample is automatically and gently stirred in the crucible 29 as the rotary table 31 rotates at an angle, making it homogeneous and bubble-free, and then entering the furnace chamber. 19 Take out the crucible 29 outside and leave it to cool. The glass beads cooled to room temperature naturally peel off from the crucible 29 and can be easily taken out. In addition, the device of the present invention can produce multiple glass beads at the same time, is quiet because it does not mechanically vibrate, does not scatter melt, and has a smoother surface than conventional glass beads. It has many characteristics such as being extremely smooth. Figure 5 shows 0.4g of oxide, 6g of melting agent, 1100℃,
FIG. 2 is a plan view of glass beads taken out after melting for 20 minutes and manually stirred. Also, Figure 6 shows the oxide
0.4 g of melting agent, 6 g of melting agent, and stirred at 1100° C. for 20 minutes using the apparatus according to the present invention. FIG. From FIGS. 5 and 6, it can be seen that the glass beads made with the device according to the present invention are sufficiently stirred.
It can be seen that this is an excellent glass bead sample with no unevenness. Further, the results of analysis and comparison of the glass beads shown in FIGS. 5 and 6 are shown in the following table.

[Table] As can be seen from this table, the glass beads made by the apparatus according to the present invention have extremely high analytical accuracy and are highly reliable compared to glass beads made by the conventional method. As described above, the tilted rotation stirring type glass bead manufacturing device for X-ray analysis according to the present invention has an electric drive device 28 connected to the lower part of the vertical shaft 26 which is rotatably supported through the center of the furnace bottom 32. The center of the lower surface of a rotary table 31 on which a plurality of crucible mounting engagement parts 30 are arranged in a planetary manner is engaged with and mounted on the upper end of the vertical shaft 26 in the furnace, and a horizontal shaft protrudes from both sides of the outer surface of the furnace body 7. 10 and 11 are rotatably supported on the base 1, and a manual tilting device 14 is provided which is capable of rotating the furnace body 7 to an arbitrary tilted position and keeping it stopped at the arbitrary position. This makes it possible to produce high-quality glass beads for fluorescent X-ray analysis, and the structure is simple, easy to operate, and extremely practical.

[Brief explanation of the drawing]

The drawings show one embodiment of the tilted rotary stirring type glass bead making device according to this invention, in which Fig. 1 is a perspective external view of the whole device, Fig. 2 is a front view of the whole device, Fig. 3 is a plan view of the rotary table, and Fig. 4 is a side view of the rotary table. Fig. 5 is a plan view of glass beads made by the conventional manual method, and Fig. 6 is a plan view of glass beads made by the device of this invention. 7 ... heating furnace body, 10, 11 ... horizontal axis, 14
......Manual tilting device, 26...Vertical shaft, 28...Variable speed electric drive device, 30...Engagement portion, 31...Rotary table, 32...Furnace bottom.

Claims (1)

[Scope of utility model registration request] An electric drive device is connected to the lower part of a vertical shaft rotatably supported through the center of the furnace bottom, and the center of the lower surface of the rotary table has a plurality of crucible mounting engagement parts arranged in a planetary manner. A horizontal shaft that is engaged with the upper end of the shaft and protrudes from both sides of the outer surface of the furnace body is rotatably supported on the base, and the furnace body can be rotated to an arbitrary tilted position and stopped at the arbitrary position. A tilting rotation stirring type glass bead manufacturing device for fluorescent X-ray analysis, which is equipped with a manual tilting device that can maintain the state.