JPS618563A - Production of sealing metal fitment to be used for vacuum tube of solar heat collector - Google Patents

Abstract

PURPOSE:To make it easy to connect a connecting pipe of a heat collector element and a transparent pipe, by sandblasting a sealing metal fitment so as to roughen the surface thereof, forming an oxidized film thereon, welding glass thereonto, and removing the oxidized film by sandblasting. CONSTITUTION:A molded body of a glass sealing alloy such as Kovar, 426 alloy or the like is formed to have an upright edge section 1 and an opening 2 in the central section by using a press. Then by blasting sand mainly consisting of alumina, the surfaces of the outer and inner sides of the upright edge section 1 are roughened as shown at 3. All the surfaces of the body are formed with a oxidized film 4 by wet oxidizing treatment. The sealing metal fitment that has an oxidized film formed after sandblasting exhibits improved wetability when glass is welded thereto, and the sealing can be carried out favorably without generating bubbles. Then a glass layer 5 is formed for covering the tip of the upright section 1. Then the oxidized films on the outer and inner surfaces of the opening 2 are removed by sandblasting.

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to a method for making a sealed sword in a vacuum tube for a solar heating device, and particularly relates to a surface treatment method for a sealed gold peach. [Technical background of the invention and its problems] In general, an X-wall tube for a solar heat collector is constructed by sealing at both ends of the sigma gance neck and housing a heat-collecting element that moves slowly with the outside through a slow-moving mechanism inside. Ru.

In the case of the above structure, the communication pipe of the heat collecting element is generally made of steel.
Since it has been used for a long time, VFJ shielding with glass becomes a problem.

Conventionally, the bonding between glass and metal, the so-called resistance layer, involves the anastomosis of hard glass, an alloy of iron, nickel, and cobalt (hereinafter referred to as "govar base metal") and soft glass with a case of iron, nickel, and chromium alloy. (hereinafter referred to as 426 alloy) etc. are used. The thermal expansion number of these M eyebrow tools is almost the same as that of glass, and the layering properties are also good. Therefore, in the structure of the hollow tube layer-resistant section, the crow and layer-resistant metal fittings are joined together, and the copper layer metal fittings and the heat collector cord (V-delay tube) are joined.

As a method for entering these sealed cities, the layer metal J4 was subjected to wet hydrogen gas treatment, so-called numeralization treatment, in advance to improve its dripping resistance with crows, and the six-sided dimpled BL-tray-shaped bottom was applied. There is a brazed shield with a copper plate, which is a slow-smelling tube of A4 heat element, which is resistant to glass and has a brazing resistance of 1ζ0.
However, the above-mentioned layer resistance method had the following drawbacks and was not favorable. However, the residual vN strain of the glass in the layer-resistant portion is also small, and cracks are likely to occur due to heat shock. Next, the encapsulant metal that has been subjected to digitization processing is likely to cause leakage due to the copper materials used in the 1J Kumoku Kikiko's continuous return to the shrine. be.

[Purpose of the invention]

The present invention was developed in consideration of my own circumstances,
The object of the present invention is to provide a method for manufacturing a sealing fitting for a vacuum tube for a solar power heater, which does not have the above-mentioned drawbacks by subjecting the sealing fitting to surface roughening treatment and treatment to remove oxides from urine.

[Summary of the invention]

RJ of the present invention, by means of a glass sealing ring, on the outer periphery, a raised edge for joining with the end of the transparent glass tube containing the fruit body is connected to the medium flame part and the above-mentioned system. The entire opening for protruding and fitting the gold plate (7t) is formed, and at the same time, a small portion of the above molded body is roughly sandblasted.
Gutomokami 6b Tachijoto no I @ roughening treatment process, rinsing skin i15 due to wet water-based scum! The process of forming the tray, the process of covering the top edge of the glass with a layer of glass, and the process of removing the protrusion of the glass by sandblasting, removing a small amount (also known as the process of removing the forked skin lAl1'' at the opening). This invention relates to a method for installing anti-slip fittings in vacuum tubes for solar heat flux heaters, which have a hook feature.

[Embodiments of the invention]

An example of uninventiveness will be explained based on the drawings.

The drawings are for a detailed explanation of the invention.

First, let's focus on Figure 1 (L)? C, Crow: #Kovar Daikama, 426 Daikama, etc., which are used for shields, are used for the Bracelet L, the L handle is rounded by the 2 openings in the center of the XL 1st part, and the 2 openings are made in the center. 1' - 0 Furthermore, in order to match the above-mentioned standing edge 1a with the end of the transparent glass tube for collecting lees,
The opening 2C of the housing 1ζ is provided to accommodate a metal tube connected to the heat emitting element.

Next, as shown in Anchor 2, sandblasting is carried out using alumina as the main component. The surface roughness is Ll, which is about 1μ and is flat, and this is comparable because it has a shielding force with the 2nd base. Tsutomuro Kazuhiro's ability to increase the M shield power against crows.I did it only on the vertical edge where it joins with the FL roughened VJ glass, but even if I treated it all, it still didn't run. Since the tip of the molded body M[1M51 has a moon beam or a crack, it is possible to form a round edge 1a grape without a paris at the stage of Fig. 2 in order to make the glass removal resistance more compact. Desirable〇Next, as shown in Fig. 3, four oxide films are formed on the entire surface by wet fermentation treatment◇ In other words, the molded product that has been subjected to all the processes shown in Fig. 2 is heated in water vapor and hydrogen 15-1 at 800-1000℃ in a gas atmosphere
After heat treatment for about 20 minutes, a grayish-colored oxide film 4 is obtained.

When sealing with the metal fitting lath on which the sandblasted oxide film 4 has been formed, the blistering properties are improved and the generation of bubbles is also improved (good layer resistance is achieved.Next, as shown in Figure 4) Form a tip cover 5 at the vertical line s1 (also called a glass tip).Add a glass tube with approximately the same diameter as the layer-resistant metal fitting to the sealing piece I51 of the metal fitting while heating the cutting edge. The method used by Jusaku to correct the desired shape using a hand trowel, or the peedo obtained by molding the topography.
cR This is done by a mechanical method in which it is fitted into a shield metal fitting and is heat-resistant at the cutting edge.

In addition, if the standing edge part! There is also a method of directly inspecting the light glass tube using a housekeeper's force method, but the finish of the end of the layer-resistant metal fittings is conducive to the dimensions of the streetcar, such as the string, the opposite bank of the light glass tube, and the center ring. Is there a way to prepare a layer of glass in advance on the layer-resistant metal fittings, and attach a transparent glass tube to it with a corrugated blade? I like it.

Next, as shown in FIG. 5, the abraded skin yA of the inner and outer garments 4 of the opening 2 is removed by sandblasting. At the above opening 2VC, a gold ring connected to the ripening rope (not shown) is used to connect the pot to the gold ring in the event of a meeting or failure. Use wax, nickel wax, etc. to make 1ζ wax. In this case, if there is a 4-P in the brazing section 11, the brazing material will not be good VCkn, so the support will be insufficient, and even if it is possible to braze properly on the outside station, it will not be possible to pierce the A. This may cause a leak.

2'-In the case of the invention (in the form of a sieve U), it cannot be easily removed because it is exposed as a defeat.

It can be easily removed by sandblasting 7 times. In the case of sandblasting chestnuts, it is desirable to mask the crow layer to prevent sand from hitting the chestnuts. Furthermore, the oxide film on the entire surface other than the glass layer may be removed.

〔Effect of the invention〕

In the present invention, the surface of the glass expansion part of the layer-resistant metal fittings was sandblasted in advance to make it rough and the corner part was smoothed with a smooth surface treatment, which prevents the occurrence of bubbles that form cracks. The IA distortion is suppressed and the layer density is clearly the same as above. On the other hand, when sandblasting is not performed, the atomized film itself peels off, and the glass also peels off easily. No matter what the casing'rC distortion removal information 1' is, 9 cracks and 75 successes are produced because the lA rectangular distortion is large.

Furthermore, in the Ω field of the present invention, a sufficient oxide film can be changed by wet removal treatment at a lake temperature of 800 to 1000 degrees Celsius for 15 to 60 minutes, but if sandblasting is not carried out as in the conventional method, a vortex 950 Under the conditions of ~1000°C and 40 to 90 minutes, it was not possible to form a sufficient oxide film; do not have.

According to the present invention, each step of forming an oxide film on the layer-resistant metal fittings by sandblasting, forming an oxide film by humidification treatment, and removing the oxidation film by sandblasting is applied to the layer-resistant metal fittings. When forming a nitriding tube for a heating device, it is easy to join the connecting tube of the heat collector tube and the connecting tube, and the tightness of the joint is good, so that it is completely transparent. It is extremely important to understand the color order by changing the color order.

[Brief explanation of the drawing]

Figure 1A is a cross-sectional view at each step of the process for explaining the method used in the solar fruit heating device, which is an example of the method of the present invention; metal fittings molded body,
Figure 2 shows the two sides of the sandbushist ↓ and the vertical edge has been made into a uniform surface, Figure 6 has a hem formed with a thresholded skin tear r formed by genus processing, and Figure 4 has a glass fabric on the vertical edge of 1J. Raised eyebrows, Figure 5 r
The oxide film on the bottom part of the J side is removed and the 7C position is attached. Explanation of the O code.

Claims (1)

[Claims] 1. Using a glass sealing alloy, there is a raised edge on the outer periphery for joining with the end of the transparent glass tube that houses the heat collector element.
A molded body is formed in the center thereof with an opening for protruding and joining a metal tube connected to the element, and a surface roughening process of at least the erect edges of the molded body by sandblasting, wet hydrogen. A step of forming an oxide film using gas, a step of covering the tip of the vertical edge and welding glass, and a step of sandblasting to remove the oxide film at least at the opening except for the welded portion of the glass. A method for manufacturing a sealing fitting for a vacuum tube for a solar heat collector.