JPH0637757U - Composite type aluminum sensor - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to prevent the protective tube from being damaged by the contracting force of the solidified product of molten zinc in the meniscus portion. [Structure] A protective body 11 is provided so as to surround the outer surface of the protective tube 1 of the sensitive part 5 and is provided with a plurality of rods 8 ... To do.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a composite type aluminum sensor capable of continuously measuring the aluminum concentration in a zinc-aluminum alloy such as a galvanizing pot.

[0002]

[Prior art]

 As a conventional composite type aluminum sensor a, as shown in FIG. 7, a molten salt electrolyte c and an electrode d are positioned in a protection tube b using a quartz tube or the like, and a measurement hole e is formed at the tip of the protection tube b. To form a sensitive part f, the sensitive part f and the bath-side electrode g are vertically immersed in the zinc bath h, and the electromotive force is measured during this period to continuously measure the aluminum concentration. In order to prevent damage to the protective tube b due to mechanical shock caused by dross scraping work in the zinc bath h, as shown in FIG. 7, a metal tube i having a diameter larger than that of the protective tube b is protected. It is installed around b.

[0003]

[Problems to be solved by the device]

 However, in the conventional composite type aluminum sensor a, in the meniscus portion j which is the bath surface in the zinc bath h, the molten zinc is cooled and solidified k by the heat transfer to the upper part of the metal tube i, and as shown in FIG. There is a problem that the protective tube b is damaged by the shrinkage force of the solidified product k. Further, since there is no convection of molten zinc in the metal tube i, it is more easily solidified.

Therefore, the present invention seeks to provide a composite type aluminum sensor capable of preventing the protective tube from being damaged by the contracting force of the solidified product of molten zinc in the meniscus portion.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a protective body is provided, which is provided so as to surround the outer surface of the protective tube of the sensitive section and is provided with a plurality of rods standing upright in the longitudinal direction of the protective tube. Of.

Further, it is preferable that the distance between the adjacent rods is set within the outer diameter of the protective tube due to the effect described later.

[0007] Similarly, in order to achieve the above-mentioned object, a ceramic outer jacket member is provided around the surface of the protective tube of the sensitive section that is in contact with at least the meniscus section, and a protective body is provided around the outer jacket member. To do.

[0008]

[Action]

 As described above, according to the composite type aluminum sensor of the present invention, when the sensitive part and the bath-side electrode are vertically immersed in the zinc bath, the molten zinc freely comes in and out through the gap between the rod and the rod in the protective body. It is possible to continuously measure the aluminum concentration while convection in the rod.

If the distance between the adjacent rods is set within the outer diameter of the protective tube, even if the protective tube is damaged, the damaged protective tube will be caught by the rod of the protective body. It does not flow out.

Further, in the case of using the one characterized in that at least the outer surface of the protective tube of the sensitive section which is in contact with the meniscus section is provided with a ceramic outer jacket member and a protective member is provided around the outer jacket member, Due to the ceramic nature of the jacket material attached to the protective tube, it maintains elasticity without sintering even when the operating temperature in the zinc bath rises to about 460-480 ° C, so that molten zinc, for example, is a meniscus. Even if it solidifies at the part, it is possible to protect the protective tube from the contracting force.

[0011]

【Example】

 The details of the present invention will be described with reference to further illustrated embodiments. FIG. 1 shows a composite type aluminum sensor A (hereinafter, simply referred to as aluminum sensor A) of the first embodiment of the present invention. For example, the aluminum concentration in a zinc-aluminum alloy such as a galvanized pot is shown. It is possible to measure continuously.

In the aluminum sensor A, as shown in FIG. 1, a molten salt electrolyte 2 and an electrode 3 are placed in a protective tube 1 made of a quartz tube, Pyrex glass or the like, and a measurement hole 4 is formed at the tip of the protective tube 1. It is possible to continuously measure the aluminum concentration by forming the sensitive part 5 provided and dipping the sensitive part 5 and the bath-side electrode 6 vertically in the zinc bath 7 and measuring the electromotive force during this period. It is possible. Then, on the surface of the protective tube 1, as shown in FIGS. 1 and 2, six or a suitable number of rods 8 of cylindrical or prismatic columns are spaced apart so as to surround the outer surface of the protective tube 1 of the sensitive portion 5. 1. A standing body is installed so that the meniscus portion 9 which is the bath surface is located midway along the length direction of 1, and the protective body 11 in which both ends of the rod body 8 ... Is fixed by ring-shaped connecting plates 10 is installed. ing. Further, even if the protective tube 1 is damaged, the distance between the adjacent rods 8 and the rod 8 in the protective body 11 is protected so that the damaged protective tube 1 does not flow out from the rod 8. The outer diameter of the body 11 is set below. Here, as the material of the rod 8 or the connecting plate 10 in the protective body 11, a stainless steel such as SUS316 or other metal can be used.

Next, the aluminum sensor A of the second embodiment will be described with reference to FIGS. 3 and 4. The aluminum sensor A of the second embodiment has substantially the same structure as the aluminum sensor A of the first embodiment, but as the protective body 11, the distance between the adjacent rods 8 and 8 as shown in FIGS. 3 and 4. Is set to be larger than the outer diameter of the protective body 11 and a similar connecting plate 10 is provided between the connecting plates 10 at both ends, so that the molten zinc solidifies 12 at the meniscus portion 9 of the zinc bath 7 to protect it. Even if the body 11 is damaged, the length between the connecting plate 10 and the connecting plate 10 is set to be shorter than the length of the damaged protective tube 1, so the damaged protective tube 1 flows out from inside the rod 8. There is nothing to do.

Finally, the aluminum sensor A of the third embodiment will be described with reference to FIGS. 5 and 6. In the aluminum sensor A of the third embodiment, as the protective body 11, a ceramic outer jacket member 13 is attached in close contact with at least the surface of the protective tube 1 in contact with the meniscus portion 9, and the outer circumference thereof is separated by a cylindrical shape or A protective member 11 having a rectangular tube shape is provided. By attaching this ceramic jacket member 13, due to the nature of the ceramic, elasticity is maintained without sintering even if the operating temperature in the zinc bath 7 rises to about 460-480 ° C. Even if the molten zinc solidifies 12 in the meniscus portion 9 as in 5, the protective tube 1 can be protected from the contracting force, and the ceramic outer covering member 13 is corrosive to the molten zinc. Of. Further, the protective body 11 described above is not limited to the cylindrical shape or the rectangular tubular shape, and the protective body 11 described with reference to FIG. 1 or 3 can be similarly installed around the outer cover member 13. .

In the above example, the composite type aluminum sensor is targeted, but the temperature sensor such as a thermocouple can be similarly protected by attaching the protector 11.

Therefore, according to the aluminum sensor A of the first and second embodiments, the sensitive part 5 and the bath side electrode 6 are vertically immersed in the zinc bath 7 as shown in FIG. 1 or 3. Then, it is possible to continuously measure the aluminum concentration while the molten zinc freely flows in and out of the gap between the rods 8 in the protective body 11 and convects inside the rods 8 ...

Further, according to the aluminum sensor A of the third embodiment, the operating temperature in the zinc bath 7 rises to about 460 to 480 ° C. due to the nature of the ceramic of the jacket member 13 attached to the protective tube 1. However, since the elasticity is maintained without sintering, even if the molten zinc solidifies 12 in the meniscus portion 9 as shown in FIG. 5, the protective tube 1 can be protected from the contracting force of the solidified material 12. Of.

As described above, according to the aluminum sensors A of the first and second embodiments, the molten zinc freely flows in and out from the gap between the rods 8 in the protective body 11 and the rods 8 ... Since the cross-sectional area of the rod 8 of the protective body 11 is small compared to the case of using a metal tube for convection, the cooling of the molten zinc is suppressed by the heat transfer to the upper part, and the aluminum concentration is continuously maintained. Even with the measurement, the condensation of molten zinc in the meniscus portion 9 of the zinc bath 7 can be minimized. Even if the protective tube 1 is damaged due to condensation of molten zinc or the like, in the aluminum sensor A of the first embodiment, the distance between the adjacent rods 8 and 8 is set to be equal to or less than the outer diameter of the protective body 11. As a result, the damaged protective tube 1 does not flow out from the rod 8 of the protective body 11 ... In addition, in the aluminum sensor A of the second embodiment, due to the length of the damaged protective tube 1, Since the length between the connecting plates 10 is set to be short, the protective tube 1 does not flow out from the rods 8 ... Moreover, in the aluminum sensor A of the second embodiment, by providing similar connecting plates 10 between the connecting plates 10 at both ends of the protective body 11, for example, the molten zinc is melted at the meniscus portion 9 of the zinc bath 7. Even if the protective body 11 is damaged due to solidification 12 and the protective body 11 is damaged, the length between the connecting plate 10 and the connecting plate 10 is set shorter than the length of the damaged protective tube 1, so the damaged protective tube 1 Since it does not flow out from inside the rod 8, the distance between the protective tube 1 and the rod 8 can be set longer accordingly, so that the solidification 12 of molten zinc is less likely to connect between the protective tube 1 and the rod 8 It is possible to prevent the growth of the zinc solidified matter 12.

Furthermore, according to the aluminum sensor A of the third embodiment, the operating temperature in the zinc bath 7 rises to about 460 to 480 ° C. due to the nature of the ceramic of the jacket member 13 attached to the protective tube 1. However, since the elasticity is maintained without sintering, even if the molten zinc solidifies 12 in the meniscus portion 9 as shown in FIG. 5, the protective tube 1 can be protected from the contracting force of the solidified material 12. Moreover, since ceramic is corrosive to molten zinc, it is possible to completely prevent corrosion at the meniscus portion 9 of the protective tube 1.

[0020]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects. According to the composite type aluminum sensor of claim 1, compared with the case where molten zinc freely flows in and out of the gap between the rods in the protective body to convect inside the rod, and a metal pipe is used, Due to the small cross-sectional area of the rod of the body, the cooling of molten zinc is suppressed by the transfer of heat to the upper part, and even if the aluminum concentration is continuously measured, the condensation of molten zinc at the meniscus part of the zinc bath is minimized. It can be kept to the limit.

According to the composite type aluminum sensor of claim 2, since the length between the connecting plates is set shorter than the length of the damaged protective tube, the damaged protective tube flows out from the rod body. There is nothing.

According to the composite type aluminum sensor of claim 3, even if the operating temperature in the zinc bath rises to about 460 to 480 ° C., it is sintered due to the nature of the ceramic of the jacket member attached to the protective tube. Since the elastic tube maintains elasticity, even if the molten zinc solidifies at the meniscus, the protective tube can be protected from the shrinking force, and since the ceramic is corrosive to molten zinc, the protective tube It is possible to completely prevent the corrosion at the meniscus part of.

[Brief description of drawings]

FIG. 1 is a front view of a composite aluminum sensor according to a first embodiment in a partially sectional state.

FIG. 2 is a sectional view taken along the line AA in FIG.

FIG. 3 is a front view of a composite aluminum sensor according to a second embodiment in a partially sectional state.

FIG. 4 is a sectional view taken along the line BB in FIG.

FIG. 5 is a front view of a composite aluminum sensor according to a third embodiment in a partial cross-sectional state.

6 is a sectional view taken along the line C-C in FIG.

FIG. 7 is a front view of a conventional composite type aluminum sensor with a partial cross section.

[Explanation of symbols]

 A Composite type aluminum sensor 1 Protective tube 2 Molten salt electrolyte 3 Electrode 4 Measuring port 5 Sensing part 6 Bath side electrode 7 Zinc bath 8 Rod 9 Meniscus part 10 Connecting plate 11 Protective body 12 Coagulation 13 Outer material

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideo Kimura 1-5-24 Mishimae, Takatsuki-shi, Osaka Prefecture Yamasato Sangyo Co., Ltd. Takatsuki factory (72) Jun Ueda 1-5 Mishimae, Takatsuki-shi, Osaka Prefecture No. 24 Yamazato Sangyo Co., Ltd. Takatsuki factory

Claims (3)

[Scope of utility model registration request] 1. A composite-type aluminum sensor, characterized in that a protective body is provided so as to surround the outer surface of the protective tube of the sensitive section and is provided with a plurality of rods standing upright in the longitudinal direction of the protective tube. . 2. The composite aluminum sensor according to claim 1, wherein the distance between adjacent rods is set within the outer diameter of the protective tube. 3. A composite type aluminum sensor characterized in that a ceramic outer cover member is provided around a surface of a protective tube of a sensitive portion which is in contact with at least a meniscus portion, and a protective body is provided around the outer member.