CN217324174U - Large horizontal high-pressure gas quenching furnace - Google Patents

Abstract

The utility model belongs to the technical field of vacuum heat treatment equipment, especially, relate to a large-scale horizontal high pressure gas quenching stove. The structure is simple, the processing, manufacturing and maintenance costs are low, the installation is convenient, the safety is good, the mass production of the equipment is convenient, and the requirements of the market on the equipment are met. Comprises a furnace body, a heating chamber, a vacuum system, a water cooling system and an air cooling system; the furnace body comprises a temperature equalizing assembly, a safety valve, a thermocouple temperature measuring mechanism and an electrode; the temperature equalizing assembly, the safety valve, the thermocouple temperature measuring mechanism and the electrode working end are respectively communicated with the furnace body working cavity; the air cooling system comprises a corrugated pipe assembly, a heat exchanger, an air guide cover, an impeller and a motor; the wind scooper is fixed on the heating chamber and inserted into the air inlet of the heat exchanger below, the heat exchanger is fixed on the inner wall of the furnace body, the air outlet of the heat exchanger is inserted into the impeller below, the impeller is fixed on the shaft of the motor, and the motor is fixed on the flange of the furnace body.

Description

Large horizontal high-pressure gas quenching furnace

Technical Field

The utility model belongs to the technical field of vacuum heat treatment equipment, especially, relate to a large-scale horizontal high pressure gas quenching stove.

Background

The vacuum gas quenching technology is an advanced heat treatment means, the surface of a treated workpiece is bright, does not increase carbon and does not decarbonize, and the service life of a product bearing friction and contact stress in service is prolonged by several times or even higher. And the size and shape of the quenched workpiece are small in deformation, the product is uniform in hardness, and the process stability and the repeatability are good, so that the method is more important for the heat treatment industrial application of mass production by adopting a computer microelectronic technology and an intelligent control system. The more precise the product, the greater the influence of the surface state after heat treatment on its economic and technical effect. However, the diameter of most of the uniform temperature areas of the domestic equipment cannot exceed 2000mm, and the requirement of quenching cooling speed of the uniform temperature areas exceeding the specification is difficult to meet.

Disclosure of Invention

The utility model provides a large horizontal high-pressure gas quenching furnace aiming at the defects in the prior art.

In order to realize the purpose, the utility model adopts the following technical proposal that the device comprises a furnace body, a heating chamber, a vacuum system, a water cooling system and an air cooling system; the furnace body is characterized by comprising a temperature equalizing component, a safety valve, a thermocouple temperature measuring mechanism and an electrode; the temperature equalizing assembly, the safety valve, the thermocouple temperature measuring mechanism and the electrode working end are respectively communicated with the furnace body working cavity.

The air cooling system comprises a corrugated pipe assembly, a heat exchanger, an air guide cover, an impeller and a motor; the air guide cover is fixed on the heating chamber and inserted into the air inlet of the heat exchanger below, the heat exchanger is fixed on the inner wall of the furnace body, the air outlet of the heat exchanger is inserted into the impeller below, the impeller is fixed on the motor shaft, and the motor is fixed on the flange of the furnace body.

Further, the furnace body is also provided with an inflation and deflation system and an air storage tank.

Furthermore, the thermocouple temperature measuring mechanism adopts a dual-core thermocouple structure.

Furthermore, an air guide opening and a hearth assembly are added in the heating chamber.

Furthermore, the furnace body adopts a horizontal double-layer cylinder water-cooled wall structure, and circulating cooling water (a water-cooling system) is introduced into the furnace body.

Furthermore, a furnace door is arranged on the furnace body, the furnace door is connected with the furnace body through a hinge, bearings are arranged at two ends of a hinge shaft, and the hinge shaft is driven by a speed reduction motor to drive the furnace door to rotate.

Furthermore, the oven door is provided with an observation window. The condition in the furnace is convenient to observe.

Compared with the prior art the utility model discloses beneficial effect.

The utility model discloses simple structure, manufacturing and maintenance cost are low, and simple to operate, security are good and the equipment batch production of being convenient for has satisfied the requirement to this kind of equipment in the market.

Drawings

The present invention will be further described with reference to the accompanying drawings and the following detailed description. The scope of protection of the present invention is not limited to the following description.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a top view of the present invention.

In the figure, 1, a furnace body; 2. an air cooling system; 3. a water cooling system; 4. a heating chamber; 5. a real system; 6. a pneumatic system; 7. an inflation and deflation system; 8. a gas storage tank; 9. a skip car; 10. controlling the hanging cabinet; 11. a power source; 12. a temperature equalizing component; 13. a safety valve; 14. a thermocouple temperature measuring mechanism; 15. an electrode; 16. a bellows assembly; 17. a heat exchanger system; 18. a wind scooper; 19. an impeller; 20. a motor; 21. a hinge; 22. and (4) locking a ring.

Detailed Description

As shown in fig. 1-2, the utility model comprises a furnace body 1, a heating chamber 4, a real system 5, a water cooling system 3 and an air cooling system 2; the furnace body 1 comprises a temperature equalizing component 12, a safety valve 13, a thermocouple temperature measuring mechanism 14 and an electrode 15; the working ends of the temperature equalizing component 12, the safety valve 13, the thermocouple temperature measuring mechanism 14 and the electrode 15 are respectively communicated with the working cavity of the furnace body 1.

The air cooling system 2 comprises a corrugated pipe assembly 16, a heat exchanger, an air guide cover 18, an impeller 19 and a motor 20; the wind scooper 18 is fixed on the heating chamber 4 and inserted into the air inlet of the heat exchanger below, the heat exchanger is fixed on the inner wall of the furnace body 1, the air outlet of the heat exchanger is inserted into the impeller 19 below, the impeller 19 is fixed on the motor shaft, and the motor 20 is fixed on the flange of the furnace body 1.

Preferably, the large horizontal high-pressure gas quenching furnace further comprises a charging and discharging system 7, a gas storage tank 8, a pneumatic system 6, a skip car 9, a control hanging cabinet 10 and a power supply 11. When the furnace is in work, the assembled workpiece is conveyed into a hearth through the skip car 9, then the furnace door is closed, and the whole heat treatment process such as vacuumizing, heating, cooling and the like is controlled through a preset program.

Preferably, the furnace body 1 is provided with a thermocouple temperature measuring mechanism 14, specifically, a dual-core thermocouple structure is adopted.

Preferably, an air guide opening and a hearth assembly are added to the heating chamber 4. The heating chamber 4 (furnace pipe) is a horizontal cylindrical structure, the whole frame shell is made of stainless steel, and the outer surface of the whole frame shell is polished. The furnace pipe is fixed on the inner wall of the furnace body 1 through the adjusting frame, can be detached, takes thermal expansion into consideration, and is convenient and simple to maintain and replace.

Preferably, the furnace body 1 adopts a horizontal double-layer cylinder water-cooled wall structure (double-layer water-cooled jacket structure), and circulating cooling water (a water-cooling system 3) is introduced into the furnace body. The whole pressing force container of furnace body 1 is designed according to the standard, the welding seam of furnace body 1 is formed evenly and beautifully, the inner wall of furnace body 1 is polished smoothly, and each connection position has good sealing performance. After the furnace body 1 is welded, the stress is removed by integral vibration, and the machining and welding stress is eliminated. All sealing surfaces of the furnace body 1 are subjected to secondary processing after stress relief treatment, so that the sealing precision is ensured, and meanwhile, the pressure rise rate of the furnace body 1 can meet the technical index for a long time through air pressure, water pressure and helium mass spectrum leakage detection.

Preferably, the furnace door and the furnace body 1 are connected through a hinge 21, bearings are arranged at two ends of a shaft of the hinge 21, and the shaft of the hinge 21 is driven by a speed reducing motor 20 to drive the furnace door to rotate. The furnace door is provided with an observation window, which is convenient for observing the condition in the furnace. The furnace door has advanced, stable and reliable structure and enough strength and rigidity: without modification.

The heat preservation layer of the furnace body 1 adopts an all-metal reflecting screen structure and consists of 7 layers, and is fixed on the frame through a high-temperature molybdenum rod, so that no pollution is caused in the vacuum furnace, and the heat preservation effect is good. The heating elements of the furnace body 1 are wide-band-shaped high-temperature molybdenum lanthanum alloy heating elements, the molybdenum bands are uniformly distributed along the circumference of the hot zone for 360 degrees and are connected in a segmented manner, each group of heating elements can be singly be improperly familiar with detached, and the replacement and the maintenance are convenient. In order to ensure the uniformity of the furnace temperature, heating elements are arranged according to a plurality of heating zones, each zone is provided with an independent temperature control system, a power supply system and an electric control system, each zone can be independently controlled, the temperature uniformity is good, and the service life of a heating belt is long.

Description of specific embodiments: 1. the furnace shell is too heavy, too large in size, easy to supertall and superwide and influences transportation. For the reasons, the exposed legs of the furnace body 1 adopt a split structure, so that the height limit of a transport vehicle is effectively reduced while the interchangeability is ensured. Furnace casing furnace gate weight is too big, and manual switch is very hard, the utility model discloses an electronic structure of opening the door, through motor 20 speed reducer drive hinge 21 axle rotation, it is rotatory to drive the furnace gate, owing to adopted low-speed reduction ratio, guarantees that the furnace gate can effectively open and shut safely and steadily, very big saving the human cost, improved production efficiency.

2. The heating chamber 4 adopts a split structure, and because the size of the uniform temperature area is larger, the deformation of the heating chamber 4 is very large in a high-temperature environment, the original deformation of the split heating chamber 4 is effectively reduced by one half, and the effective operation of heating is ensured. The heating belt also adopts a split structure, and more short belts and multi-turn forms are adopted by changing the connection mode of the heating belt, so that the service life of the heating belt is ensured.

3. In the aspect of air-cooled heat exchange, the cooling rhythm is accelerated by increasing the size and the overflowing area of the heat exchanger and increasing the flow of overflowing cooling water. The effective fan and impeller 19 ratio provides the maximum air volume to meet the cooling requirements while ensuring cost control.

The working process is as follows: firstly, after a workpiece is loaded into a furnace, a Roots pump unit in a vacuum system 5 is started to perform rough evacuation on a furnace body 1, when the vacuum degree reaches 10Pa, a diffusion pump is started to perform evacuation on the furnace body 1, when the vacuum degree reaches 10-3Pa, a heating chamber 4 starts to heat according to a preset heating curve, evacuation is stopped after the heating curve is ended, inert gas is filled into the furnace, then a fan is started to perform gas quenching on the workpiece, and when the temperature of the workpiece is reduced to below 50 ℃, the fan is closed to take the workpiece.

It should be understood that the above detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as the use requirement is satisfied, the utility model is within the protection scope.

Claims (7)

1. The large-scale horizontal high-pressure gas quenching furnace comprises a furnace body, a heating chamber, a vacuum system, a water cooling system and an air cooling system; the method is characterized in that: the furnace body comprises a temperature equalizing assembly, a safety valve, a thermocouple temperature measuring mechanism and an electrode; the temperature equalizing component, the safety valve, the thermocouple temperature measuring mechanism and the electrode working end are respectively communicated with the furnace body working cavity;

the air cooling system comprises a corrugated pipe assembly, a heat exchanger, an air guide cover, an impeller and a motor; the wind scooper is fixed on the heating chamber and inserted into the air inlet of the heat exchanger below, the heat exchanger is fixed on the inner wall of the furnace body, the air outlet of the heat exchanger is inserted into the impeller below, the impeller is fixed on the shaft of the motor, and the motor is fixed on the flange of the furnace body.

2. The large horizontal high-pressure gas quenching furnace according to claim 1, wherein: the furnace body is also provided with an inflation and deflation system and an air storage tank.

3. The large horizontal high-pressure gas quenching furnace according to claim 1, wherein: the thermocouple temperature measuring mechanism adopts a dual-core thermocouple structure.

4. The large horizontal high-pressure gas quenching furnace according to claim 1, wherein: the heating chamber is internally provided with an air guide port and a hearth component.

5. The large horizontal high-pressure gas quenching furnace according to claim 1, wherein: the furnace body adopts a horizontal double-layer cylinder water-cooled wall structure, and circulating cooling water is introduced into the horizontal double-layer cylinder water-cooled wall structure.

6. The large horizontal high-pressure gas quenching furnace according to claim 1, wherein: the furnace body is provided with a furnace door, the furnace door is connected with the furnace body through a hinge, bearings are arranged at two ends of a hinge shaft, and the hinge shaft is driven by a speed reducing motor to drive the furnace door to rotate.

7. The large horizontal high-pressure gas quenching furnace according to claim 6, wherein: the oven door is provided with an observation window.

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