JPS6316988Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is particularly applicable to coke ovens, hot blast ovens, etc.
This invention relates to a removable double or more protective tube structure for measuring large high temperature furnaces at temperatures above ℃.

Traditionally, 1200℃, such as coke ovens or hot air ovens, etc.
As an example of a removable protection tube structure for a thermocouple that is used for temperature measurement in a device with a high temperature of ~1400°C and a large structure, the outside of the base of an external protection tube 1 made of charcoal-fired silicon (SIC), etc. An external protective tube body A is formed by fixing and connecting heat-resistant metal supports 2 with heat-resistant cement 3, etc., and a holding fitting 5 is attached to the outside of the base of an internal protective tube 4 made of alumina (Al ₂ O ₃ ), etc. with heat-resistant cement 3, etc. The internal protective tube B is fixed to the internal protective tube B, and the protrusion 6 provided externally on the internal protective tube B is engaged with the protrusion 7 provided at the proximal end of the external protective tube A, and the presser metal fitting is inserted from above. 8 is fitted and removably assembled. However, as a protection tube for thermocouples installed in large high-temperature furnaces such as coke ovens or hot blast stoves, 1.5
Since it is necessary to use a long piece of about 3 m to 3 m, when firing a long ceramic protection tube, it is difficult to obtain a straight one, and the longer it is, the more likely it is to be fired in a bent state. It was a lot.

Therefore, in the protection tube body structure illustrated in FIG. 1, for example, when inserting the curved inner protection tube 4 into the straight outer protection tube 1, as shown by the imaginary line, due to its structure, the mounting base axis Because the maximum deflection occurs at the tip with respect to the core, it may not be possible to insert the protection tube depending on the length and degree of bending, and even if it is inserted, the inner protection tube may be in contact with or in pressure contact with the outer protection tube. Moreover, both protection tubes have the problem of vibration and resonance due to the vibration of the furnace itself and the action of the flowing gas in the furnace, and also damage due to thermal shock and a decrease in mechanical strength at high temperatures. Ta. In view of the above-mentioned problems regarding the structure of both protective tube bodies, the present invention has been developed to provide a removable thermocouple protective tube that can be fully adapted to temperature measurement in large high-temperature furnaces such as coke ovens and hot blast ovens, which have severe temperature measurement conditions. It provides body structure.

The details of the present invention will be explained below based on the illustrated embodiment.The present invention consists of an outer protective tube body A and an inner protective tube body B, as in FIG.
An external protective tube 1 made of metal or ceramics is fixed to a cylindrical metal support 2 via a heat-resistant cement 3, and a flange 9 is provided on the outer periphery of the base end. An internal protective tube 4 made of metal or ceramics, etc., which can be housed inside the external protective tube body A and has a thermocouple inside, is provided at the center, and an external metal tube 10 is fixed to the outer base with heat-resistant cement 3 or the like. It is made by packaging the .

The thermocouple protection tube structure of the present invention includes an inner protection tube B having an inner protection tube 4 containing a thermocouple capable of measuring high temperatures of 1000°C or more, and one or more outer protection tubes. In a thermocouple protection tube structure in which the inner and outer protection tubes A and B are removably installed inside the body A, and at least one of the inner and outer protection tubes A and B is made of ceramics,
The mounting state at the base end of the outer protection tube 1 or the inner protection tube 4 is configured to allow bending during manufacturing, which occurs when the outer protection tube 1 or the inner protection tube 4 are made of ceramics, when they are installed inside each other. In order to achieve the object of the present invention, in the present invention, a position adjustment means is provided between the base end of the outer protective tube A and the base of the inner protective tube B to accommodate the bending of each other. ing. This position adjustment means includes a ring 11 having a substantially semicircular cross section on the outside of the base of the internal protective tube body B.
, and the ring 11 is removably fixed to the diametrically outward expansion point 12 provided within the base end of the external protective tube body A that is sheathed to the internal protective tube body B, and to the base end of the external protective tube body. Presser end 14 of presser member 13 made of
This purpose is achieved by sandwiching the outer protection tube between the outer protection tube and the outer protection tube, and by arranging the inner surface 15 of the proximal end of the outer protection tube, the inner surface 16 of the holding member, and the outer surface 17 of the base of the inner protection tube with a slight distance from each other. However, it is of course possible to directly fix the ring 11 to the internal protection tube 4 itself, and it goes without saying that the above object can be achieved.

In the example shown in FIG. 2, an enlarged area 12 is formed at the base end of such an external protective tube body A, and the lower end surface thereof is tapered slightly upward. A tubular holding member 13 having an external shape that can be fitted into the proximal end of the external protective tube body is fitted and fixed in this expanded space, and the inner edge of the lower end of the holding member 13 is cut into a tapered shape. On the other hand, a ring 11 made of stainless steel or the like and having a substantially semicircular cross section is fixed to the base of the internal protective tube body B. Therefore, the inner protection tube B to which the ring 11 having a semicircular cross section is fixed is installed inside the outer protection tube A, and then the presser member 13 is fitted into the proximal end of the outer protection tube A from above and fixed. As a result, the ring 11 at the base of the inner protective tube body is pressed and clamped from above and below by the widened area 12 of the outer protective tube body A and the presser end 14 of the presser member 13. Therefore, the inner edge of the expanded opening 12 of the inner protection tube B and the inner edge of the lower end of the presser member 13 are required to have smaller inner diameters than the outer diameter of the ring of the inner protection tube B. In order to be able to adjust the position of the inner protective tube B in the insertion direction within the outer protective tube A after the inner protective tube B is held between the widened part 12 of the outer protective tube A and the presser end 14 of the presser member 13. It is necessary that the inner surface 15 of the proximal end of the outer protective tube, the inner surface 16 of the presser member, and the outer surface 17 of the base of the inner protective tube are spaced a little apart from each other.

In the embodiment shown in FIG. 2 having such a configuration, the internal protection tube B is installed in the corresponding protection tube A, and then the setting position of the internal protection tube 4 of the internal protection tube B is adjusted. The inner protection tube setting position is set to outer protection tube 1.
After arranging the ring 11 of the inner protective tube B so as to have a space with each surface thereof, the holding member 13 is fitted or screwed into the proximal end of the outer protective tube B, and the ring 11 of the inner protective tube B is clamped and fixed. The mutual positional relationship will be fixed.

In addition, what is shown as 18 in the figure is an inorganic buffering means filled in the space between the inner protection tube and the outer protection tube, and is designed to protect the inner protection tube 4 from direct shocks such as vibration or heat from the outside during use. In addition, the proximal end expansion site 12 of the external protective tube body A shown in the figure is expanded upward, but it has a curved surface of the same shape as the ring 11 that is easy to apply. It is also possible to form an expanded form.

Next, what is shown in FIG.
This shows another embodiment in which the means for clamping and fixing the ring 11 is different from the embodiment shown in the figure.
The holding member 13 for forming the expanded area 12 similar to that shown in FIG.
The ring body has a shape that can be fitted onto the base end of the ring body. Presser end 1 of the presser member at this time
4 and FIG. 2, the slope is not at the lower end position, but at the upper internal position. Therefore, the presser end 14 of the presser member 13 in the present invention is not necessarily at the lower end position as shown in FIG. 2, but can also be appropriately employed at an inclined surface at an upper position inside the presser member 13.

Further, the embodiment shown in FIG. 4 shows an example in which an intervening ring 19 separate from the holding member 13 is provided between the lower end of the holding member 13 and the upper surface of the ring 11 in the embodiment shown in FIG. This intervening ring 19 can be fitted into the expanded space 12 of the external protective tube body A, and its lower edge inner surface is formed into a tapered shape, and is positioned so that it can press the upper surface of the ring 11, so that the lower end of the presser member 13 and the ring By fitting and fixing the holding member 13 from above to the proximal end of the external protective tube body A, the lower edge of this intervening ring 19 is inserted between the rings 1 and 11.
1 is suppressed and fixed.

Therefore, in addition to FIGS. 2 and 3, the presser member 13
As the presser end 14, not only the direct portion of the presser member 13 but also the end of another intervening means for pressing the ring 11 can be used as the presser end.

FIG. 5 shows a spring 21 externally fitted to the inner protective tube B below a fixing part 20 fixed to the proximal end of the outer protective tube to hold down the ring 11 in the embodiments shown in FIGS. 2 to 4. A presser member 13 which is similarly fitted onto the inner protective tube body B is disposed through the inner protective tube body B, and the ring 11 of the inner protective tube body B is pressed by the tapered surface of the lower edge of the presser member.

Therefore, in the embodiment shown in FIG. 5, compared to the embodiment shown in FIGS. By adjusting the angle of the external protective tube body A and fixing it internally, even when vertical vibration is applied to the internal protective tube body B while the thermocouple is in use, the vibration is absorbed and the internal protective tube 4 from being damaged.

3 to 5, the inner surface 15 of the proximal end of the outer protective tube, the inner surface 16 of the presser member, and the outer surface 1 of the base of the inner protective tube are similar to those shown in FIG.
7 are arranged a little apart from each other, which is the same as in FIG.

As described above, the thermocouple protection tube structure according to the present invention consists of an inner protection tube with an inner protection tube containing a thermocouple capable of measuring high temperatures of 1000°C or more, and one or more outer protection tubes. In a thermocouple protection tube structure in which the interior of the thermocouple is removably attached and at least one of the inner and outer protection tubes is made of ceramics, a ring with a substantially semicircular cross section is provided on the outside of the base of the inner protection tube. A diametrically outward expanding space provided in the proximal end of the external protective tube body with the ring fixed and sheathed on the internal protective tube body, and a presser member removably fixed to the proximal end of the external protective tube body. A thermocouple protective tube structure in which the outer protective tube is held between the presser end and the inner surface of the proximal end of the outer protective tube, the inner surface of the presser member, and the outer surface of the base of the inner protective tube are spaced apart from each other. Therefore, even if all or part of the inner or outer protective tube is made of ceramics and the axis is bent, the inner protective tube may not be installed inside the outer protective tube. In some cases, by adjusting the mounting condition appropriately and fixing the ring at the base of the inner protective tube body between the widening part of the outer protective tube body and the presser end of the presser member, the angle can be adjusted and the position can be fixed. According to this fixing method, even if the internal protective tube is damaged, the holding member can be removed from the external protective tube to quickly take out the internal protective tube from the external protective tube and replace it with a new one or replace it with a new one. If you use a spring like the one shown in Figure 5 as a means to hold down the ring of the inner protection tube, you can not only adjust the position when it is installed inside the outer protection tube, but also prevent the outer protection tube from high heat, etc. during use. , and even if it moves up and down, it acts to buffer and absorb it, and as shown in Figure 4, another member is interposed between the presser member and the ring, and the presser member is inserted and fixed. By doing so, if the ring is fixed, the presser member and the intervening member will not rotate together, and the ring can be pressed uniformly throughout, resulting in a great pressing effect.

[Brief explanation of the drawing]

FIG. 1 is a sectional explanatory diagram showing a conventional example, FIG. 2 is a partial sectional explanatory diagram of an embodiment according to the present invention, and FIGS. 3 to 5 are partial sectional explanatory diagrams of other embodiments of main parts in FIG. 2. It is. A: External protective tube body, B: Internal protective tube body, 1: External protective tube, 2: Metal support, 3: Heat-resistant cement, 4: Internal protective tube, 5: Holding metal fitting, 6: Projection piece,
7: Stepped portion, 8: Presser fitting, 9: Flange, 10:
External metal pipe, 11: Ring, 12: Expansion, 1
3: Holding member, 14: Holding end, 15: Inner surface of the proximal end of the outer protection tube, 16: Inner surface of the holding member, 17: Outer surface of the base of the inner protection tube, 18: Inorganic buffer means, 1
9: Interposition ring, 20: Fixing part, 21: Spring.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. An inner protection tube body equipped with an inner protection tube equipped with a thermocouple capable of measuring high temperatures of 1000°C or higher is removably attached to one or more outer protection tube bodies. In a thermocouple protection tube structure in which at least one of the inner and outer protection tubes is made of ceramics; a ring having a substantially semicircular cross section is fixed to the outside of the base of the inner protection tube, and the ring is It is held between a diametrically outwardly expanding opening provided in the proximal end of the external protective tube externally mounted on the protective tube and a presser end of a presser member detachably fixed to the proximal end of the external protective tube. A protective tube structure for a thermocouple, in which the inner surface of the proximal end of the outer protective tube, the inner surface of the holding member, and the outer surface of the base of the inner protective tube are arranged at a certain distance from each other. 2 The holding member is provided with an annular holding part that can be fitted onto the inner protection tube via a spring and can press the ring at the tip of the annular fixing part that can be fitted and fixed to the proximal end of the external protection tube. A protective tube structure for a thermocouple according to claim 1 of the utility model registration claim, which utilizes the following.