Adjustable steam system for heat treatment

Abstract

The utility model belongs to the technical field of heat treatment, and particularly relates to an adjustable steam system for heat treatment. The utility model provides an adjustable steam system for heat treatment, which is characterized in that a workpiece is arranged in a heat treatment box to be heated in a manner of sequentially connecting a steam generator, a heater, a flow meter, a front-end regulating valve, the heat treatment box, a rear-end regulating valve and a steam recycling box through pipelines; high-temperature steam atmosphere prepared by the steam generator and the heater is input into the heat treatment box, a stable and actively-adjustable treatment space is formed in the heat treatment box through the front-end adjusting valve and the rear-end adjusting valve, the pressure of the atmosphere in the heat treatment box and stable in and out of the atmosphere are controlled, the adjusting efficiency is high, and initiative is high; the heat treatment effect of workpieces is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat treatment, and in particular relates to an adjustable steam system for heat treatment. Background Art

[0002] Heat treatment refers to a metal thermal processing process in which a material is heated, kept warm, and cooled in a solid state to obtain the desired structure and properties. Heating is one of the important steps in heat treatment. The earliest heating methods for metal heat treatment used charcoal and coal as heat sources, and later liquid and gas fuels, electric heating, etc. were applied. When the metal is heated, the workpiece is exposed to the air, and oxidation and decarburization often occur, that is, the carbon content on the surface of the steel part decreases, which has a very adverse effect on the surface properties of the part after heat treatment. Therefore, metals should usually be heated in a controlled atmosphere or protective atmosphere, in molten salts, and in a vacuum. Coatings or packaging methods can also be used for protective heating.

[0003] For example, the Chinese invention patent application with patent publication number CN104540605A and publication date 2015.04.22 discloses a heat treatment method, a heat treatment furnace and a heat treatment system. The heat treatment system includes a heat treatment furnace, an external tank and a solvent supply device; the heat treatment furnace includes a shell, a solvent storage tank and a steam generating heater.

[0004] The heat treatment method, heat treatment furnace and heat treatment system in this invention patent have the following general structural principles: the shell of the heat treatment furnace accommodates the workpiece, the solvent storage tank is used to store the water-containing heat source solvent, the steam generating heater heats the heat source solvent stored in the solvent storage tank to generate steam in the shell, the external tank is arranged outside the heat treatment furnace and is connected to the solvent storage tank through a flow channel, and the solvent supply device allows the heat source solvent to move between the external tank and the solvent storage tank through the flow channel to immerse the workpiece in the heat source solvent or expose the workpiece from the heat source solvent.

[0005] However, the heat treatment furnace and the heat treatment system still have at least the following deficiencies during actual use, in other words, these are the technical problems to be solved by the present utility model.

[0006] The steam atmosphere of its heat treatment system comes from the heat treatment furnace. When the heat treatment furnace is set to a steam atmosphere, its detector detects parameters such as the air pressure in the furnace and then feeds back to the control unit, and finally adjusts the flow rate of steam entering, which is relatively passive and inefficient.

[0007] Therefore, in summary, there is an urgent need for an atmosphere heat treatment system that actively controls steam. Utility Model Content

[0008] The utility model provides an adjustable steam system for heat treatment, which can connect a steam generator, a heater, a flow meter, a front-end regulating valve, a heat treatment box, a rear-end regulating valve and a steam recovery box in sequence through pipelines, so that: a workpiece is placed in the heat treatment box for heating, the steam generator and the heater prepare a high-temperature steam atmosphere and input it into the heat treatment box, a stable and actively adjustable treatment space is formed in the heat treatment box through the front-end regulating valve and the rear-end regulating valve, the pressure of the atmosphere in the heat treatment box and the stable inflow and outflow of the atmosphere are controlled, the adjustment efficiency is high and the initiative is strong, and the heat treatment effect of the workpiece is guaranteed.

[0009] The technical solution adopted by the utility model to solve the above problems is: an adjustable steam system for heat treatment, the structure of which includes a steam generator connected in sequence by pipelines, a heater arranged on the steam generator, a flow meter connected to the steam generator, a front-end regulating valve connected to the flow meter, a heat treatment box connected to the front-end regulating valve, a rear-end regulating valve connected to the heat treatment box, and a steam recovery box connected to the rear-end regulating valve.

[0010] A further preferred technical solution is that a pressure sensor is also provided on the heat treatment box.

[0011] A further preferred technical solution is that: a temperature sensing couple is also provided on the heat treatment box.

[0012] A further preferred technical solution is that a high-purity argon gas station for purifying steam is provided between the heater and the flow meter.

[0013] A further preferred technical solution is that a steam cooler is provided between the rear end regulating valve and the steam recovery tank.

[0014] A further preferred technical solution is that a steam purifier is provided between the rear end regulating valve and the steam recovery tank.

[0015] A further preferred technical solution is that a backup heater is provided between the steam generator and the flow meter.

[0016] A further preferred technical solution is that the heat treatment box includes a cylindrical main box, and a steam inlet end cover and a steam outlet end cover provided on the cylindrical main box.

[0017] A further preferred technical solution is that the heat treatment box further includes an air vent plate provided on the cylindrical main box and close to the steam inlet end cover.

[0018] A further preferred technical solution is that at least two air vent plates are provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a connection diagram of the utility model.

[0020] Figure 2 It is a structural stereogram of the heat treatment box in the utility model.

[0021] In the figure, the meanings of the marks are as follows:

[0022] Dashed lines represent electrical connections, solid lines represent pipeline connections;

[0023] Workpiece a;

[0024] Steam generator 1, heater 2, flow meter 3, front-end regulating valve 4, heat treatment box 5, rear-end regulating valve 6, steam recovery box 7, pressure sensor 8, temperature sensing couple 9, high-purity argon gas station 10, steam cooler 11, steam purifier 12, spare heater 13, display screen 14;

[0025] Cylindrical main body box 501, steam inlet end cover 502, steam outlet end cover 503, and air vent plate 504. DETAILED DESCRIPTION

[0026] The following description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

[0027] As attached Figure 1-2 As shown, an adjustable steam system for heat treatment comprises a steam generator 1 connected in sequence by pipelines, a heater 2 arranged on the steam generator 1, a flow meter 3 connected to the steam generator 1, a front-end regulating valve 4 connected to the flow meter 3, a heat treatment box 5 connected to the front-end regulating valve 4, a rear-end regulating valve 6 connected to the heat treatment box 5, and a steam recovery box 7 connected to the rear-end regulating valve 6.

[0028] In this embodiment, the function of the steam generator 1 is to prepare steam and heat the steam through the heater 2. The heater 2 can be arranged on the steam generator 1, or between the steam generator 1 and the flow meter 3. Its function is to heat the steam in the pipeline at high temperature. An electric heating steam generator can also be used instead of the steam generator 1 and the heater 2. The flow meter 3 is used to detect the flow of the steam atmosphere.

[0029] In addition, the function of the front-end regulating valve 4 is to control the amount of steam entering the heat treatment box 5. The workpiece a is placed in the heat treatment box 5. The heat treatment box 5 can be heated using an existing muffle furnace. The maximum heating temperature is 950°C and the heating temperature uniformity is ±10°C.

[0030] Finally, the rear-end regulating valve 6 is used to adjust the steam discharge volume of the heat treatment box 5, and can cooperate with the front-end regulating valve 4 to adjust the steam content in the heat treatment box 5, so that the heat treatment effect of the workpiece a is better. The front-end regulating valve 4 and the rear-end regulating valve 6 are electric one-way valves, which can control the pressure of the atmosphere in the reaction chamber and the stable inflow and outflow of the atmosphere by adjusting the valve opening. The function of the steam recovery box 7 is to collect the steam in the pipeline to prevent the leakage of high-temperature steam and the occurrence of safety or environmental problems. At the same time, the entire adjustable steam system for heat treatment can be linked through the display screen 14, and each detection equipment, control equipment and reaction situation can be monitored and regulated in real time, and intelligently processed.

[0031] The heat treatment box 5 is also provided with a pressure sensor 8 .

[0032] In this embodiment, the function of the pressure sensor 8 is to detect the atmosphere pressure parameters in the heat treatment box 5. The pressure sensor 8 can be set on the heat treatment box 5, or it can be set on the pipeline between the front-end regulating valve 4 and the rear-end regulating valve 6 through a three-way valve, so as to achieve real-time detection of the atmosphere pressure in the heat treatment box 5.

[0033] The heat treatment box 5 is also provided with a temperature sensing couple 9 .

[0034] In this embodiment, the temperature sensing couples 9 are used to detect the temperature within the heat treatment chamber 5. Five temperature sensing couples 9 are welded to the steam outlet cover 503, located at the front, middle, rear, top, and bottom positions of the workpiece a, forming a wrapping state, which can more accurately detect the temperature within the heat treatment chamber 5.

[0035] A high-purity argon gas station 10 for purifying steam is also provided between the heater 2 and the flow meter 3 .

[0036] In this embodiment, the function of the high-purity argon gas station 10 is to purify the heated steam atmosphere by removing the impurity gas components in the liquid nitrogen and liquid argon through the molecular sieve adsorption and electric heater in the adsorption tower, thereby achieving a purification effect. At the same time, it can ensure the safety and stability of the atmosphere preparation process, and can also achieve a cooling effect after the preparation is completed to protect the safety of the system.

[0037] A steam cooler 11 is further provided between the rear end regulating valve 6 and the steam recovery tank 7 .

[0038] In this embodiment, the function of the steam cooler 11 is to cool and liquefy the high-temperature steam discharged from the rear end regulating valve 6. The steam cooler 11 can be set on the steam recovery tank 7 or on the pipeline between the rear end regulating valve 6 and the steam recovery tank 7.

[0039] A steam purifier 12 is further provided between the rear end regulating valve 6 and the steam recovery tank 7 .

[0040] In this embodiment, the function of the steam purifier 12 is to purify the high-temperature steam discharged from the rear-end regulating valve 6 to prevent it from being discharged and polluting the environment. The positions of the steam cooler 11 and the steam purifier 12 are not limited, and it is advisable to cool first and then purify.

[0041] A backup heater 13 is further provided between the steam generator 1 and the flow meter 3 .

[0042] In this embodiment, the function of the standby heater 13 is to supplement or backup the steam atmosphere prepared by the steam generator 1. When the heater 2 has a problem or the heating effect is poor, the standby heater 13 can be used for heating. At the same time, the standby heater 13 can also play the role of heat preservation and auxiliary heating.

[0043] The heat treatment box 5 includes a cylindrical main box 501 , a steam inlet end cover 502 and a steam outlet end cover 503 provided on the cylindrical main box 501 .

[0044] In this embodiment, the function of the cylindrical main box 501 is to accommodate the workpiece a. At the same time, the cylindrical main box 501 needs to be heated by a muffle furnace or other heating equipment to meet the heat treatment requirements of the workpiece a. The steam inlet end cover 502 is fixedly arranged on one side of the cylindrical main box 501 and is connected to the pipeline at the end of the front end regulating valve 4. The steam outlet end cover 503 is arranged on the other side of the cylindrical main box 501 through a blind plate, a flange and a high-temperature sealing ring and is connected to the rear end regulating valve 6.

[0045] The heat treatment box 5 further includes an air vent plate 504 provided on the cylindrical main box 501 and close to the steam inlet end cover 502 .

[0046] In this embodiment, the function of the air vent plate 504 is to input the steam atmosphere passing through the steam inlet end cover 502 into the cylindrical main box 501 more evenly and stably, so that the heat treatment effect of the workpiece a is better.

[0047] At least two air vent plates 504 are provided.

[0048] In this embodiment, since the cylindrical main box 501 needs to be heated by itself through a muffle furnace and then the steam generator 1 is turned on to prepare the steam atmosphere, there is a difference in temperature and pressure between the heated steam and the inside of the cylindrical main box 501. In order to increase the uniformity and stability of the atmosphere, at least two air vent plates 504 are provided, and the distances between the two air vent plates 504 and the steam inlet end cover 502 are 50 mm and 80 mm respectively.

[0049] While the embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited to the embodiments described above. Various modifications are possible within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. These modifications are non-inventive and are protected by patent law as long as they fall within the scope of the claims of the present invention.

Claims

1. An adjustable steam system for heat treatment, characterized in that: The structure comprises a steam generator (1) connected in sequence by pipelines, a heater (2) arranged on the steam generator (1), a flow meter (3) connected to the steam generator (1), a front-end regulating valve (4) connected to the flow meter (3), a heat treatment box (5) connected to the front-end regulating valve (4), a rear-end regulating valve (6) connected to the heat treatment box (5), and a steam recovery box (7) connected to the rear-end regulating valve (6).

2. The adjustable steam system for heat treatment according to claim 1, characterized in that: The heat treatment box (5) is also provided with a pressure sensor (8).

3. The adjustable steam system for heat treatment according to claim 1, characterized in that: The heat treatment box (5) is also provided with a temperature sensing couple (9).

4. The adjustable steam system for heat treatment according to claim 1, characterized in that: A high-purity argon gas station (10) for purifying steam is also provided between the heater (2) and the flow meter (3).

5. The adjustable steam system for heat treatment according to claim 1, characterized in that: A steam cooler (11) is also provided between the rear end regulating valve (6) and the steam recovery tank (7).

6. The adjustable steam system for heat treatment according to claim 1, characterized in that: A steam purifier (12) is also provided between the rear end regulating valve (6) and the steam recovery tank (7).

7. The adjustable steam system for heat treatment according to claim 1, characterized in that: A backup heater (13) is also provided between the steam generator (1) and the flow meter (3).

8. The adjustable steam system for heat treatment according to claim 7, characterized in that: The heat treatment box (5) comprises a cylindrical main box (501), a steam inlet end cover (502) and a steam outlet end cover (503) arranged on the cylindrical main box (501).

9. The adjustable steam system for heat treatment according to claim 8, characterized in that: The heat treatment box (5) further comprises an air vent plate (504) arranged on the cylindrical main box (501) and close to the steam inlet end cover (502).

10. The adjustable steam system for heat treatment according to claim 9, characterized in that: At least two air vent plates (504) are provided.

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