Vacuum heat treatment furnace for heat treatment of titanium alloy

Abstract

The utility model relates to the technical field of vacuum heat treatment furnaces, and discloses a vacuum heat treatment furnace for titanium alloy heat treatment, which solves the problem that the existing vacuum heat treatment furnace is inconvenient to control nitrogen temperature, and comprises a furnace body, a sealing cover is arranged at one end of the furnace body, and a control device is arranged on one side of the furnace body. A sealing cover is arranged on one side of the furnace body, a vacuumizing device is arranged on the other side of the furnace body and communicated with the furnace body, and a nitrogen supply mechanism is arranged at the end, away from the sealing cover, of the furnace body and composed of a heat exchange assembly, a gas supply assembly, a gas supply pipe, a first exhaust pipe and a second exhaust pipe. The air supply pipe and the first exhaust pipe are connected between the heat exchange assembly and the air supply assembly, and the second exhaust pipe is connected to one end of the air supply assembly. By means of the vacuum heat treatment furnace, nitrogen can be supplied through liquid nitrogen, the temperature of the nitrogen can be controlled through heat of the vacuum heat treatment furnace, and anti-oxidation protection on titanium alloy is achieved through the nitrogen.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuum heat treatment furnaces, and specifically relates to a vacuum heat treatment furnace for heat treatment of titanium alloys. Background Art

[0002] Vacuum heat treatment means that all or part of the heat treatment process is carried out in a vacuum state. The vacuum heat treatment furnace has high thermal efficiency, can achieve rapid heating and cooling, can achieve non-oxidation, non-decarburization, non-carburization, can remove the phosphorus chips on the surface of the workpiece, and has functions such as degreasing and degassing, so as to achieve the effect of surface brightening and purification.

[0003] Heat treatment of titanium alloys is usually carried out using a vacuum heat treatment furnace. During the heat treatment process of titanium alloy workpieces in the vacuum heat treatment furnace, the vacuum heat treatment furnace is evacuated through a vacuum pumping device, and then nitrogen gas usually needs to be supplemented into the vacuum heat treatment furnace. Utilizing the stable and inactive chemical properties of nitrogen gas can further prevent the oxidation of titanium alloys. At the same time, during the annealing process of titanium alloys, nitrogen gas also needs to be introduced to achieve auxiliary cooling. However, in the prior art, for the introduced nitrogen gas, it is not convenient to control its temperature. If the nitrogen gas temperature is too low, it will affect the processing quality of titanium alloys. Therefore, this application proposes a vacuum heat treatment furnace for heat treatment of titanium alloys. Summary of the Utility Model

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a vacuum heat treatment furnace for heat treatment of titanium alloys, effectively solving the problem that the existing vacuum heat treatment furnace is not convenient to control the temperature of nitrogen gas.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: A vacuum heat treatment furnace for heat treatment of titanium alloys includes a furnace body. One end of the furnace body is provided with a sealing cover, one side of the furnace body is provided with control equipment, and the other side of the furnace body is provided with a vacuum pumping device. The vacuum pumping device is communicated with the furnace body. One end of the furnace body far from the sealing cover is provided with a nitrogen supply mechanism. The nitrogen supply mechanism is composed of a heat exchange component, a gas supply component, a gas supply pipe, an exhaust pipe one, and an exhaust pipe two. The heat exchange component is inserted and connected to one end of the furnace body. Both the gas supply pipe and the exhaust pipe one are connected between the heat exchange component and the gas supply component. The exhaust pipe two is fixedly connected to one end of the gas supply component.

[0006] Preferably, the gas supply component is composed of a heat-insulating and sealing tank and a liquid nitrogen tank. The liquid nitrogen tank is fixedly connected inside the heat-insulating and sealing tank and is communicated with the gas supply pipe. The heat-insulating and sealing tank is communicated with the exhaust pipe one and the exhaust pipe two.

[0007] Preferably, the heat exchange component is composed of a heat exchange air inlet chamber, a main exhaust pipe, a plurality of first heat exchange exhaust branch pipes, a plurality of second heat exchange exhaust branch pipes, and an annular heat exchange pipe. The main exhaust pipe penetrates through the central position of the heat exchange air inlet chamber and is connected to the furnace body and the first exhaust pipe. The heat exchange air inlet chamber is fixedly connected to one end of the furnace body and is connected to the gas supply pipe. A plurality of air inlets are provided at one end of the heat exchange air inlet chamber close to the furnace body. The annular heat exchange pipe is fixedly connected to the inside of the heat exchange air inlet chamber. Both the first heat exchange exhaust branch pipe and the second heat exchange exhaust branch pipe are connected between the main exhaust pipe and the annular heat exchange pipe.

[0008] Preferably, a first solenoid valve is provided on the main exhaust pipe, and second solenoid valves are provided on both the first heat exchange exhaust branch pipe and the second heat exchange exhaust branch pipe.

[0009] Preferably, a plurality of heat conducting fins are fixedly provided on both sides of the annular heat exchange pipe, and a heat insulating sleeve is sleeved on the middle position of the outer surface of the main exhaust pipe.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] (1) During operation, by providing a gas supply component composed of a heat insulating and sealing tank and a liquid nitrogen tank, nitrogen can be supplied through liquid nitrogen, thereby using nitrogen to protect the titanium alloy and further preventing the titanium alloy from oxidizing during the heat treatment process. The first exhaust pipe and the second exhaust pipe can be used to appropriately heat the liquid nitrogen tank by using waste heat, so that the liquid nitrogen becomes nitrogen.

[0012] (2) By providing a heat exchange component composed of a heat exchange air inlet chamber, a main exhaust pipe, a plurality of first heat exchange exhaust branch pipes, a plurality of second heat exchange exhaust branch pipes, and an annular heat exchange pipe, the low-temperature nitrogen can be preheated to an appropriate temperature by using waste heat, thereby improving the annealing and cooling effect on the titanium alloy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model, and do not constitute a limitation to the present utility model.

[0014] In the drawings:

[0015] Figure 1 is a schematic structural diagram of a vacuum heat treatment furnace for titanium alloy heat treatment according to the present utility model;

[0016] Figure 2 is a schematic structural diagram of a nitrogen supply mechanism according to the present utility model;

[0017] Figure 3 is a schematic structural diagram of a heat exchange component according to the present utility model;

[0018] Figure 4This is a cross-sectional view of the heat exchange component of the present utility model;

[0019] In the figure: 1, furnace body; 2, sealing cover; 3, control equipment; 4, vacuum pumping device; 5, nitrogen supply mechanism; 6, heat exchange component; 7, gas supply component; 8, gas supply pipe; 9, exhaust pipe 1; 10, exhaust pipe 2; 11, heat insulation and sealing tank; 12, liquid nitrogen tank; 13, heat exchange intake chamber; 14, main exhaust pipe; 15, heat exchange exhaust branch pipe 1; 16, heat exchange exhaust branch pipe 2; 17, annular heat exchange pipe; 18, intake port; 19, solenoid valve 1; 20, solenoid valve 2; 21, heat conducting fin; 22, heat insulation sleeve. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments; based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0021] As Figures 1 to 3 shown, the vacuum heat treatment furnace for titanium alloy heat treatment of the present utility model includes a furnace body 1. A sealing cover 2 is provided at one end of the furnace body 1. A control equipment 3 is provided on one side of the furnace body 1. A vacuum pumping device 4 is provided on the other side of the furnace body 1. The vacuum pumping device 4 is communicated with the furnace body 1. A nitrogen supply mechanism 5 is provided at one end of the furnace body 1 away from the sealing cover 2. The nitrogen supply mechanism 5 is composed of a heat exchange component 6, a gas supply component 7, a gas supply pipe 8, an exhaust pipe 1 9 and an exhaust pipe 2 10. The heat exchange component 6 is inserted and connected to one end of the furnace body 1. Both the gas supply pipe 8 and the exhaust pipe 1 9 are connected between the heat exchange component 6 and the gas supply component 7. The exhaust pipe 2 10 is fixedly connected to one end of the gas supply component 7;

[0022] The vacuum pumping device 4 can be used to perform a vacuum pumping operation on the furnace body 1. The furnace body 1 is used to perform heat treatment on the titanium alloy. The nitrogen supply mechanism 5 is used to protect the titanium alloy during the heat treatment process, further preventing the titanium alloy from undergoing oxidation. The control equipment 3 is used to control the device;

[0023] As Figures 1 to 4It is provided that the gas supply assembly 7 is composed of a heat-insulating and sealed tank 11 and a liquid nitrogen tank 12. The liquid nitrogen tank 12 is fixedly connected to the inside of the heat-insulating and sealed tank 11 and communicated with the gas supply pipe 8. The heat-insulating and sealed tank 11 is communicated with the first exhaust pipe 9 and the second exhaust pipe 10. The heat exchange assembly 6 is composed of a heat exchange air inlet chamber 13, a main exhaust pipe 14, a number of first heat exchange exhaust branch pipes 15, a number of second heat exchange exhaust branch pipes 16 and an annular heat exchange pipe 17. The main exhaust pipe 14 penetrates through the central position of the heat exchange air inlet chamber 13 and is communicated with the furnace body 1 and the first exhaust pipe 9. The heat exchange air inlet chamber 13 is fixedly connected to one end of the furnace body 1 and communicated with the gas supply pipe 8. A number of air inlets 18 are opened at one end of the heat exchange air inlet chamber 13 close to the furnace body 1. The annular heat exchange pipe 17 is fixedly connected to the inside of the heat exchange air inlet chamber 13. The first heat exchange exhaust branch pipes 15 and the second heat exchange exhaust branch pipes 16 are both connected between the main exhaust pipe 14 and the annular heat exchange pipe 17. An electromagnetic valve 19 is arranged on the main exhaust pipe 14. Electromagnetic valves 20 are arranged on both the first heat exchange exhaust branch pipes 15 and the second heat exchange exhaust branch pipes 16. A number of heat conducting fins 21 are fixedly arranged on both sides of the annular heat exchange pipe 17. A heat-insulating sleeve 22 is sleeved on the middle position of the outer surface of the main exhaust pipe 14;

[0024] The supply of nitrogen is realized through the liquid nitrogen tank 12. Nitrogen enters the inside of the heat exchange air inlet chamber 13 through the gas supply pipe 8, and then is discharged into the inside of the furnace body 1 through the air inlets 18. Nitrogen enters along the inner side of the furnace body 1, converges at the other end of the furnace body 1, and then flows back along the central position of the furnace body 1 and enters the inside of the main exhaust pipe 14. At this time, the discharged nitrogen has a relatively high temperature. If the temperature of the incoming nitrogen is too low, the electromagnetic valve 20 is opened, so that nitrogen enters the inside of the annular heat exchange pipe 17 through the first heat exchange exhaust branch pipe 15, and the incoming nitrogen is preheated through the annular heat exchange pipe 17, and then is discharged to the other end of the main exhaust pipe 14 through the second heat exchange exhaust branch pipe 16. If it is not necessary to preheat the incoming nitrogen, the electromagnetic valve 19 is opened, so that nitrogen is directly discharged through the main exhaust pipe 14. The discharged hot nitrogen enters the inside of the heat-insulating and sealed tank 11, which can realize a certain degree of heating of the liquid nitrogen tank 12, making the liquid nitrogen turn into nitrogen. An additional heating device can also be installed inside the heat-insulating and sealed tank 11 to realize supplementary heating.

[0025] During operation, by providing a gas supply assembly composed of a heat-insulating and sealed tank and a liquid nitrogen tank, the supply of nitrogen can be realized through liquid nitrogen, so as to use nitrogen to protect the titanium alloy and further prevent the titanium alloy from oxidizing during the heat treatment process. The liquid nitrogen tank can be appropriately heated by using the waste heat through the first exhaust pipe and the second exhaust pipe, so that the liquid nitrogen turns into nitrogen; by providing a heat exchange assembly composed of a heat exchange air inlet chamber, a main exhaust pipe, a number of first heat exchange exhaust branch pipes, a number of second heat exchange exhaust branch pipes and an annular heat exchange pipe, the low-temperature nitrogen can be preheated to an appropriate temperature by using the waste heat, so as to improve the annealing and cooling effect on the titanium alloy.

Claims

1. A vacuum heat treatment furnace for heat treating titanium alloys, comprising a furnace body (1), characterized in that: One end of the furnace body (1) is provided with a sealing cover (2), a control device (3) is arranged on one side of the furnace body (1), a vacuum pumping device (4) is arranged on the other side of the furnace body (1), the vacuum pumping device (4) is communicated with the furnace body (1), a nitrogen supply mechanism (5) is arranged at one end of the furnace body (1) far away from the sealing cover (2), and the nitrogen supply mechanism (5) is composed of a heat exchange component (6), a gas supply component (7), a gas supply pipe (8), an exhaust pipe one (9) and an exhaust pipe two (10). The heat exchange component (6) is inserted and connected to one end of the furnace body (1), and both the gas supply pipe (8) and the exhaust pipe one (9) are connected between the heat exchange component (6) and the gas supply component (7). The exhaust pipe two (10) is fixedly connected to one end of the gas supply component (7).

2. The vacuum heat treatment furnace for heat treatment of titanium alloy according to claim 1, wherein: The gas supply component (7) is composed of a heat insulation and sealing tank (11) and a liquid nitrogen tank (12). The liquid nitrogen tank (12) is fixedly connected to the inside of the heat insulation and sealing tank (11) and is communicated with the gas supply pipe (8). The heat insulation and sealing tank (11) is communicated with the exhaust pipe one (9) and the exhaust pipe two (10).

3. The vacuum heat treatment furnace for heat treatment of titanium alloy according to claim 1, wherein: The heat exchange component (6) is composed of a heat exchange air inlet chamber (13), a main exhaust pipe (14), a plurality of heat exchange exhaust branch pipes one (15), a plurality of heat exchange exhaust branch pipes two (16) and an annular heat exchange pipe (17). The main exhaust pipe (14) is inserted through the central position of the heat exchange air inlet chamber (13) and is communicated with the furnace body (1) and the exhaust pipe one (9). The heat exchange air inlet chamber (13) is fixedly connected to one end of the furnace body (1) and is communicated with the gas supply pipe (8). A plurality of air inlets (18) are arranged at one end of the heat exchange air inlet chamber (13) close to the furnace body (1). The annular heat exchange pipe (17) is fixedly connected to the inside of the heat exchange air inlet chamber (13). Both the heat exchange exhaust branch pipes one (15) and the heat exchange exhaust branch pipes two (16) are connected between the main exhaust pipe (14) and the annular heat exchange pipe (17).

4. The vacuum heat treatment furnace for heat treatment of titanium alloy according to claim 3, wherein: A solenoid valve one (19) is arranged on the main exhaust pipe (14), and solenoid valve two (20) is arranged on both the heat exchange exhaust branch pipes one (15) and the heat exchange exhaust branch pipes two (16).

5. The vacuum heat treatment furnace for heat treatment of titanium alloy according to claim 3, characterized in that: A plurality of heat conducting fins (21) are fixedly arranged on both sides of the annular heat exchange pipe (17), and a heat insulation sleeve (22) is sleeved on the middle position of the outer surface of the main exhaust pipe (14).

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