GB924935A - Improvements in or relating to safety devices for spraying-reheating apparatus for preparing the atmosphere in metal heat treatment processes - Google Patents
Improvements in or relating to safety devices for spraying-reheating apparatus for preparing the atmosphere in metal heat treatment processesInfo
- Publication number
- GB924935A GB924935A GB28426/60A GB2842660A GB924935A GB 924935 A GB924935 A GB 924935A GB 28426/60 A GB28426/60 A GB 28426/60A GB 2842660 A GB2842660 A GB 2842660A GB 924935 A GB924935 A GB 924935A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- heater
- relay
- closed
- resistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000010438 heat treatment Methods 0.000 title abstract 2
- 239000002184 metal Substances 0.000 title 1
- 238000000034 method Methods 0.000 title 1
- 238000003303 reheating Methods 0.000 title 1
- 239000007788 liquid Substances 0.000 abstract 8
- 239000007789 gas Substances 0.000 abstract 4
- 238000013021 overheating Methods 0.000 abstract 2
- 230000001681 protective effect Effects 0.000 abstract 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract 1
- 239000012159 carrier gas Substances 0.000 abstract 1
- 230000005611 electricity Effects 0.000 abstract 1
- 150000002576 ketones Chemical class 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
- B05B7/168—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed with means for heating or cooling after mixing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/76—Adjusting the composition of the atmosphere
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining or circulating atmospheres in heating chambers
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Resistance Heating (AREA)
Abstract
924,935. Safety devices for heaters supplying protective atmospheres for furnaces. REGIE NATIONALE DES USINES RENAULT. Aug. 16, 1960 [Aug. 26, 1959], No. 28426/60. Classes 51 (1) and 51 (2). A safety device for an electrically-heated apparatus for producing a protective furnace atmospheric from a carrier gas and a liquid having an alcohol, ketone or aldehyde radical comprises a electromagnetic valve in the liquid supply line, a thermal switch heated by parallel resistors connected in series with the main heater resistance, and a pressure-responsive switch in the gas supply line so that the electromagnetic valve is opened when the pressure in the gas line and the temperature of the thermal switch exceed predetermined values. A switch M, closed when the pressure in the gas supply line is sufficient for the operation of the atmosphere reheater and circulation, is arranged in series with a thermal switch T and the winding of a relay b, which has a contact in the circuit of the normally closed electromagnetic liquid supply valve V. A switch D, closed when the flow of liquid in the supply line is sufficient, is in series with a second relay a. The thermal switch T is heated by a resistor R6 in series with the atmosphere heating resistor R1 and has such a lag that it closes when the atmosphere heater is at a suitable operating temperature. During normal operation, switches T and M are closed, relay b energized, so that the electromagnetic valve V in the liquid supply line is open, switch D closed and relay a energized. Resistors R2, R8 in series with the heater resistor R1 are then bridged, and resistors R4, R5 connected in parallel with switch-heater resistor R6 to prevent the switch overheating. If the liquid flow fails, switch D opens to deenergize relay a, and connect a resistor R2 in series with heater R1 to limit the current flow to a value at which damage to the heater is avoided. The resistor R 4 is disconnected so that the switch heater R6 can still keep thermal switch T closed. If the gas supply pressure falls, switch M opens, de-energizing relay b, and closing electromagnetic valve V to cut-off the liquid flow, so that switch D also opens. Resistors R2, R3 are then in series with heater resistor R1, so that overheating is avoided, and shunt resistors R4, R5 are disconnected so that switch heater R6 maintains switch T closed. In the event of failure of the heater resistor R1 or the electricity supply, switch heater R6 cools and switch T opens, de-energizing relay b and thus cutting-off the liquid flow. Lamps L, S light when power is applied to the safety circuit and when relay b is closed respectively. Specification 889,209 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR803606A FR1242992A (en) | 1959-08-26 | 1959-08-26 | Safety device for atomizer-heater for preparing atmosphere for metal heat treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB924935A true GB924935A (en) | 1963-05-01 |
Family
ID=8718587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28426/60A Expired GB924935A (en) | 1959-08-26 | 1960-08-16 | Improvements in or relating to safety devices for spraying-reheating apparatus for preparing the atmosphere in metal heat treatment processes |
Country Status (4)
| Country | Link |
|---|---|
| FR (1) | FR1242992A (en) |
| GB (1) | GB924935A (en) |
| OA (1) | OA01303A (en) |
| SE (1) | SE304531B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2450878A1 (en) * | 1979-03-05 | 1980-10-03 | Air Liquide | INSTALLATION GENERATING AN ATMOSPHERE FOR HEAT TREATING METALS |
| SE461533B (en) * | 1987-09-28 | 1990-02-26 | Aga Ab | SETTING UP A LAND TO ADD A SURFACE TEMPERATURE TO A HEAT TEMPERATURE TO A HEAT TREATMENT Oven |
-
1959
- 1959-08-26 FR FR803606A patent/FR1242992A/en not_active Expired
-
1960
- 1960-08-16 GB GB28426/60A patent/GB924935A/en not_active Expired
- 1960-08-24 SE SE8072/60A patent/SE304531B/xx unknown
-
1964
- 1964-12-31 OA OA51726A patent/OA01303A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| OA01303A (en) | 1969-02-15 |
| FR1242992A (en) | 1960-10-07 |
| SE304531B (en) | 1968-09-30 |
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