CN202152359U - Three-area three-control closed type vacuum rapid cooling annealing furnace for copper wire protected by inner-circulation gas - Google Patents

Abstract

The utility model discloses a three-area three-control closed type vacuum rapid cooling annealing furnace for a copper wire protected by inner-circulation gas, comprising a furnace body. A heat insulation layer is lined on the inner wall of the furnace body, a vacuum tank is arranged in the furnace body and provided with a tank cover, a water cooling fan and a vacuum plunger valve are arranged on the tank cover; fan blades of the water cooling fan are arranged at the inner side of the tank cover, an inlet pipe of the vacuum plunger valve is connected with a protecting gas entering and cooling circulation interface, the inner wall of the heat insulation layer is divided into an upper area, a middle area and a lower area and provided with three sections of electric heaters, and each electric heater consists of a corundum nail fixed on the inner wall of the heat insulation layer and a resistance belt fixed by the corundum nail; temperature testing thermocouples are arranged at the electric heaters at the upper area, the middle area and the lower area, and connected with a temperature recorder; a temperature control thermocouple mounting pipe is inserted to the bottom of the vacuum tank from the vacuum tank; a temperature control thermocouple is arranged at part of the temperature control thermocouple mounting pipe in the tank, which corresponds to the electric heaters at the upper area, the middle area and the lower area, and the temperature control thermocouple is connected on a temperature controller. The three-area three-control closed type vacuum rapid cooling annealing furnace has the advantages of overtemperature alarm, default phase indication, couple breakage indication, water shortage alarm and protection, alarm on the lower limit of air pressure and power failure, automatic air discharge and pressure reduction by a safety valve when the upper limit of the air pressure is exceeded, a non-paper recorder adopted for temperature record.

Description

The closed internal recycle gas shield copper cash vacuum of three districts, three controls is cooled off lehre fast

Affiliated technical field

The utility model relates to a kind of vacuum annealing furnace

Background technology

Bare copper wire after present domestic insulated wire manufacturing enterprise generally adopts the vacuum well type lehre to cold working carries out anneal; Its objective is in order to eliminate cold hardening; Obtain soft attitude bare copper wire conductor; Reduce the conductor resistance rate and be convenient to the carrying out of subsequent production operation, existing technical problem mainly contains: the one, and adopt and carry out temperature control in the stove and can not guarantee in the vacuum tank (in vacuumizing back jar, to charge into like CO ₂, N ₂Shielding gas such as gas; Prevent the surface oxidation of bare copper wire in high-temperature annealing process; Claim that also clean annealing handles) up and down the homogeneity of temperature (through detect the high tank body of 2.5m up and down temperature error about 25 ℃); Cause jar interior annealed copper line surface hardness inconsistent, mechanical property and electrical property difference are bigger, influence quality product; The 2nd, because heat-processed is to adopt the Heating element of body of heater at first vacuum tank to be heated; Then bare copper wire conductor in the jar is carried out radiation heating by the tank body after heating up; Be mainly conduction heating between the conductor, have basically no the convective heating process, cause heating efficiency lower; TRT is longer, and energy-saving effect is relatively poor; The 3rd, working efficiency is not high; The annealing total time of common one jar of copper cash is from feeding → seal → vacuumizing and handled → charge into the whole process that goes out to irritate below shielding gas → heat temperature raising → insulation → air-cooled → water-cooled to 50 ℃ about about 25 hours, annealing whole process overlong time; Annealing process control weak effect, labor strength is big, often occurs causing surface blackening (oxidation) phenomenon of product in annealing process because of seal leakage, has a strong impact on quality product.

The utility model content

The purpose of the utility model provides the closed internal recycle gas shield copper cash vacuum of a kind of three districts, three controls and cools off lehre fast.

The technical scheme of the utility model is that the closed internal recycle gas shield copper cash vacuum of a kind of three districts, three controls is cooled off lehre fast, comprises body of heater; Be lined with thermal insulation layer at inboard wall of furnace body, vacuum tank is arranged in body of heater, cover is arranged on vacuum tank; The water-cooled blower fan is arranged, the vacuum column plug valve on cover; The fan blade of water-cooled blower fan is located at the cover inboard; On the inlet tube of vacuum column plug valve, be connected to shielding gas air inlet and refrigeration cycle interface; Branch upper, middle and lower district is provided with three sections electric heaters on the thermal insulation layer inwall, and described electric heater is by being fixed on the corundum nail on the thermal insulation layer inwall and following closely the fixed resistive band through corundum and form; Be provided with temperature thermocouple at electric heater place, upper, middle and lower district, temperature thermocouple jointing temp registering instrument; The temperature-control heat couple mounting pipe is inserted into vacuum tank bottom in jar outside vacuum tank, and the temperature-control heat couple mounting pipe corresponds to electric heater place, upper, middle and lower district and is provided with temperature-control heat couple at vacuum tank inner the branch in jar, and temperature-control heat couple is connected on the temperature controller.

The utility model is to present copper cash vacuum well type lehre existing technical problem in actual production process; We have carried out long research and experiment; Utility model closed internal recycle gas shield copper cash vacuum cool off lehre fast; Its technical characterstic mainly contains: the one, and the technical scheme that adopts three districts three to control is directly measured the temperature in three districts, actual temperature feedback control burner hearth upper, middle and lower of upper, middle and lower in the tank body; Guarantee the homogeneity of temperature in the tank body, guarantee the annealing quality of product; Two adopt the water cooled seal recirculation blower to force the intravital shielding gas of jar is circulated; Its effect one is the homogeneity that guarantees protective medium gas temperature in the annealing pot; The 2nd, increased convective heating process to product; Three kinds of modes of transmission radiation, convection current, conduction of heat all obtain utilizing, and have improved heating efficiency, in energy-conservation, have also improved the working efficiency of equipment; The 3rd, utilize a jar interior shielding gas fast the annealed copper wire conductor to be cooled off through the type of cooling of heat exchanger; The evaporation efficiency of comparing with traditional air-cooled type of cooling that adds water-cooled is enhanced about more than once; The annealing total time of one jar of copper cash can be controlled in 14 hours; Not only improved usage ratio of equipment and working efficiency, and, improved the product annealing quality of copper conductors because of quick cooling effect can improve the flexibility and the unit elongation of conductor; The 4th, system adopts automatic control mode that the annealing whole process of copper cash product is controlled; Use the PLC sequence controller, guarantee to have overtemperature alarm and outage, a series of safety precautions such as disconnected even warning, upper limit alarm, lower limit warning and inflation automatically, lack of water warning, phase-deficient operation demonstration; All processing parameters of product annealed adopt directly to be imported on 19 cun touch-screens; And automatic record, be convenient to check and follow the trail of, have following characteristics: 1. overtemperature alarm; 2. phase shortage indication; 3. disconnected idol indication; 4. lack of water is reported to the police and protection; 5. the air pressure lower limit is reported to the police and outage; 6. the excess air pressure upper limit is reduced pressure by the SV automatic vent; 7. thermograph adopts recording instrument without paper; 8. temperature homogeneity≤± 3 ℃; 9. temperature control accurately≤± 1 ℃; Not only guarantee the annealing quality of product, and reduced working strength of workers.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is the utility model circuit block diagram.

Embodiment

As shown in Figure 1, the closed internal recycle gas shield copper cash vacuum of a kind of three districts, three controls is cooled off lehre fast, comprises body of heater 1; Be lined with thermal insulation layer 2 at body of heater 1 inwall, vacuum tank 3 is arranged in body of heater 1, cover 9 is arranged on vacuum tank 3; Water-cooled blower fan 10 is arranged, vacuum column plug valve 12 on cover 9; The fan blade 11 of water-cooled blower fan 10 is located at cover 9 inboards; On the inlet tube of vacuum column plug valve 12, be connected to tensimeter 14, SV 15 and shielding gas air inlet and refrigeration cycle interface 13; Branch upper, middle and lower district is provided with three sections electric heaters on thermal insulation layer 2 inwalls, and described electric heater is by being fixed on the corundum nail 5 on thermal insulation layer 2 inwalls and following closely 5 fixed resistive bands 4 through corundum and form; Be provided with temperature thermocouple 6 at electric heater place, upper, middle and lower district, temperature thermocouple 6 jointing temp registering instruments; Temperature-control heat couple mounting pipe 7 is inserted into vacuum tank 3 bottoms in jar outside vacuum tank 3; Temperature-control heat couple mounting pipe 7 corresponds to electric heater place, upper, middle and lower district at vacuum tank 3 inner branches and is provided with temperature-control heat couple 8 in jar, and temperature-control heat couple 8 is connected on the temperature controller.

As shown in Figure 2; Be provided with temperature control galvanic couple 8 (WR1, WR2, WR3) and temperature thermocouple 6 (WR4, WR5, WR6) respectively at electric heater place, upper, middle and lower district; Temperature control galvanic couple 8 (WR1, WR2, WR3) connects temperature controller, and temperature thermocouple 6 (WR4, WR5, WR6) connects TR.

Claims (1)

1. district's closed internal recycle gas shield copper cash vacuum of three controls is cooled off lehre fast; Comprise body of heater (1); Be lined with thermal insulation layer (2) at body of heater (1) inwall, vacuum tank (3) is arranged in body of heater (1), cover (9) is arranged on vacuum tank (3); Water-cooled blower fan (10) is arranged, vacuum column plug valve (12) on cover (9); The fan blade (11) of water-cooled blower fan (10) is located at cover (9) inboard; On the inlet tube of vacuum column plug valve (12), be connected to shielding gas air inlet and refrigeration cycle interface (13); It is characterized in that: branch upper, middle and lower district is provided with three sections electric heaters on thermal insulation layer (2) inwall, and described electric heater is by being fixed on the corundum nail (5) on thermal insulation layer (2) inwall and following closely (5) fixed resistive band (4) through corundum and form; Be provided with temperature thermocouple (6) at electric heater place, upper, middle and lower district, temperature thermocouple (6) jointing temp registering instrument; Temperature-control heat couple mounting pipe (7) is inserted into vacuum tank (3) bottom in jar outside vacuum tank (3); Temperature-control heat couple mounting pipe (7) corresponds to electric heater place, upper, middle and lower district at the inner branch of vacuum tank (3) and is provided with temperature-control heat couple (8) in jar, and temperature-control heat couple (8) is connected on the temperature controller.

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