DE1923150U - PROTECTIVE SLEEVE FOR MEASURING LANES FOR TEMPERATURE MEASUREMENT IN METAL MELT. - Google Patents

Description

276 * 6/26/65

HOHEYWELL

25 «June 1965

Protective sleeve for measuring lances for temperature measurement In

For temperature measurement in molten metals by fherao- element, it is common * the thermocouple measuring head containing ausi ^ eefaseltear to a so-called Long © aufsus @ _s tsen the Matching Caps "with the üeBkopf in the ffetallsöhssel" ze is immersed. At its front end, the louse contains a contact piece * onto which the measuring head is attached. It is removed after each measurement and replaced with a new one. In the rest of the situation, the ÄnselaluS lines run between the eXektrisehen Meikrei ^ j, for example a registration device, which records the temperature course converted into an electrical voltage with the help of the thermocouple. To prevent "that the measuring lance and their ueen ffeikopf receiving AnsehiuB tee with the Metallsohmelse in ^ rohmmg koiMien" is the lance and the patch on the lance part of the measuring head ¥ on a Schutzhülse- usng @ b @ n ₉ di @ as wi % of the measuring head itself is replaced with every measurement «, In the simplest case, the protective sleeve is ordered from a cardboard tube _? which J @ doeh can sometimes not ensure the complete protection of the Laaze during the entire measurement period, especially with long-term measurements, but rather burned on the surface

tew, charred "It has therefore used Schützhüleen free soda and NatronpapiewäiscSauiigen, wel'Qhes lsi a plurality ψοά layers is threaded disgusted into a tube. These improved protective sleeves hold up against the high temperatures, but are not only much more expensive, they also lead to the fact that the melt begins to splash when the lance is immersed, because the soda paper contains flammable substances Substance such as oxygen with components of the melt * especially phosphorus * magnesium or the like. Combine and burn explosively.

An opposite ueen simple cardboard tubes substantially improved protective sleeve without the drawbacks of expensive sleeves of wound kraft receives n n _ä when geraäS üer invention, the ixmer © part consists of the sleeve of cardboard and is surrounded by eiaer layer of fiber material, for example glass and / or rock wool * which is covered on the outside by a protective layer of pure Hatroupapler. The fiber material forms an effective protective cover for the inner cardboard tube serving as a supporting body and does not give rise to any "puffing" because it does not react explosively with the components of the set ^ form of the invention »for about 5 ^ of the total wall thickness, so that the flammable components of the outer shell react so quickly with the enamel already when the lance is thawed that the scaffold chews on the one hand as a result of the small toteil of soda papler still splashes and on the other hand some reactions "at the beginning of the actual Ifessuag have certainly already disappeared. The lukewarm core of the neck consists of a mixture of waste paper and hatron paper, for example in equal proportions.

The invention and its details are to be found in

Figure i sc ^ efflatiseh the ^ orö @ r @ n part d @ r medlanse and

FIG. 2 shows a cross-section through the Setatehtllge geiaiB of the invention.

Inside the MeBXanze i the electrical connecting lines to the AnsehluBstttek 2, to which the cylindrical part fitted 5 of the MeSkopfes and the compound prepared old thermocouple iperlaufen The thermocouple is check / in ^ © rd © r @ n _s ¥ on a

see part of the Meücopfes ordered from a ge @ igE @ tea Is © llermatedal, p.8. Ceramics. Plastic ode ^ dfl. the lamse 1 with the teseWussstltek 2 as well as dei »^ ylisär Part 3 of the milking head are ¥ on @ in @ S ° Sohutsshülse 5 which is pushed over the length together with the measuring head until the MeSkopi hits the KoKfeaktstüsk 2 and the © electrical connection between the® Äerasoel @ m © nt and d @ n Connection lines is made.

The protective sleeve 5 shown in Figure 2 is made up of three layers. The inner core serving as a supporting _s' in the illustrated Äusftlhrungsbeispiel about half of the wall thickness engaging layer 6 is a cardboard sleeve _g for example from a Geraisch of waste paper and Ifatronpapier. Bfeei * core is ¥ on a second Sehieöt 7 "give * di @ made of heat-resistant fiber material * for example glass wool or rock wool, consists" As an outer, dttane Beöksefeicht 8, soda paper is "wrapped" in a few layers vm the slide 7 hen®, the proportion of these The outer protective layer 8 on the entire wall thickness is relatively small and is preferably in the order of magnitude of 3 ° B & ® Matron paper can also be replaced by other suitable types of paper.

Claims (1)

Protection claims Cylindrical protective sleeve fife * the © inen exchangeable measuring head with Th © rraoei @ ® @ nt carrying lance & ur temperature. Measurement in molten metal * is characterized by " that the inner part (6) of the sleeve (5) consists of cardboard and is on a layer (7) of Piberra material * eg glass and / or rock wool" that is exposed to the outside through a thin, preferably waved © layer (8) of pure Hatron paper covered 1st. 2 «Protective sleeve according to claim!» Characterized in that that the outer layer of soda paper is about 5 $ more thick, " 3 »protective sleeve according to claim 1 or 2, Ii dadurc in that der'innere part of the sleeve from a mixture of waste paper and kraft paper loading won