Rapid cooling system for vacuum sintering furnace

Abstract

The utility model provides a rapid cooling system for a vacuum sintering furnace, which comprises a furnace wall, a cold and hot air circulating pipe connected to the furnace wall, a heat exchange tank connected to the bottom of the heat exchange tank, a water inlet pipe connected to the top of the heat exchange tank, and a water outlet pipe connected to the bottom of the heat exchange tank. The water inlet pipe and the water outlet pipe are connected with the cooling-water machine. After the scheme is adopted, the structure is reasonable, and the cooling effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum sintering furnaces, in particular to a rapid cooling system for a vacuum sintering furnace. Background Art

[0002] A vacuum sintering furnace refers to a sintering device that performs atmosphere-protected sintering on heated articles in a vacuum environment. There are many heating methods, such as resistance heating, induction heating, microwave heating, etc. A vacuum sintering furnace is a sintering device that uses resistance heating to perform protective sintering on heated articles. At present, after sintering is completed, natural cooling is generally adopted for cooling with the furnace. Its characteristics are uniform cooling, long cooling cycle, and low efficiency; or direct injection of cold inert gas is used to achieve rapid cooling. Its characteristics are short cooling cycle and non-uniform cooling, and there is a risk of affecting the quality of sintered products. Summary of the Invention

[0003] The purpose of the utility model is to provide a rapid cooling system for a vacuum sintering furnace with reasonable structure and good use effect.

[0004] To achieve the above purpose, the technical solution provided by the utility model is: a rapid cooling system for a vacuum sintering furnace, which includes a furnace wall. A hot and cold air circulation pipe is connected to the furnace wall. The hot and cold air circulation pipe is connected to a heat exchange tank. The bottom of the heat exchange tank is connected to an exchange pipe, and the exchange pipe is connected to the furnace wall. The top of the heat exchange tank is connected to a water inlet pipe, and the bottom of the heat exchange tank is connected to a water outlet pipe. The water inlet pipe and the water outlet pipe are respectively connected to a chiller.

[0005] The heat exchange tank includes a tank body, a cylinder head, and heat exchange pipes. Among them, several heat exchange pipes are vertically installed in the tank body, and a heat exchange area is reserved between adjacent heat exchange pipes. The outlet of the hot and cold air circulation pipe is connected to one side of the upper part of the heat exchange tank. The exchange pipe is connected to one side of the lower part of the heat exchange tank. The cylinder head is buckled on the top of the tank body. The water inlet pipe is connected to the cylinder head, and the bottom of the tank body is connected to the water outlet pipe.

[0006] An upper partition is fixed to the upper part of the inner cavity of the tank body, and a lower partition is fixed to the lower part of the inner cavity of the tank body. The heat exchange pipes are fixed between the upper partition and the lower partition. Through holes matching the heat exchange pipes are provided on the upper partition and the lower partition. The outlet of the hot and cold air circulation pipe is located below the upper partition, and the exchange pipe is located above the lower partition.

[0007] The bottom of the tank body gradually shrinks to form a conical shape, and the water outlet pipe is connected to the bottom of the conical shape.

[0008] After adopting the above solution, when the temperature inside the furnace needs to be reduced, the high-temperature gas inside the furnace is extracted through the hot and cold air circulation pipe and enters the tank. The water in the chiller is supplied into the tank through the water inlet pipe, flows downward through the through holes in the upper partition plate into the heat exchange pipes, then enters the conical cylinder through the through holes in the lower partition plate, and finally is discharged into the chiller (chiller) for cooling through the water outlet pipe. The high-temperature air entering the tank from the hot and cold air circulation pipe contacts the pipe wall of the heat exchange pipes, and the heat exchange pipes exchange heat with the high-temperature air. The cooled gas after heat exchange enters the furnace body again through the exchange pipe, realizing internal and external heat exchange, and repeating the cycle to achieve rapid cooling. The structure after adopting this solution is reasonable and can achieve the purpose of rapid and uniform cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0010] Figure 2 It is a schematic diagram of the water cooling unit of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0011] The following further describes the present utility model in conjunction with all the drawings. The preferred embodiment of the present utility model is as follows:

[0012] The embodiments described with reference to the drawings in this example are exemplary and are only used to explain this patent and should not be construed as a limitation to this patent.

[0013] In the description of this patent, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this patent.

[0014] In the description of this patent, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "set" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0015] The rapid cooling system of the vacuum sintering furnace described in this embodiment includes a furnace wall 1. A hot and cold air circulation pipe 2 is connected to the furnace wall 1. The hot and cold air circulation pipe 2 is connected to a heat exchange tank 5. A exchange pipe 9 is connected to the bottom of the heat exchange tank 5, and the exchange pipe 9 is connected to the furnace wall 1. A water inlet pipe 3 is connected to the top of the heat exchange tank 5, and a water outlet pipe 6 is connected to the bottom of the heat exchange tank 5. The water inlet pipe 3 and the water outlet pipe 6 are respectively connected to a chiller 7. The heat exchange tank 5 includes a tank body 8, a cylinder head 10, and heat exchange pipes 11. Among them, several heat exchange pipes 11 are vertically installed in the tank body 8, and a heat exchange area is reserved between adjacent heat exchange pipes 11. The outlet of the hot and cold air circulation pipe 2 is connected to one side of the upper part of the heat exchange tank 5, the exchange pipe 9 is connected to one side of the lower part of the heat exchange tank 5, the cylinder head 10 is buckled on the top of the tank body 8, the water inlet pipe 3 is connected to the cylinder head 10, and the water outlet pipe 6 is connected to the bottom of the tank body 8. An upper partition 13 is fixed to the upper part of the inner cavity of the tank body 8, a lower partition 12 is fixed to the lower part of the inner cavity of the tank body 8, the heat exchange pipes 11 are fixed between the upper partition 13 and the lower partition 12, and through holes matching the heat exchange pipes 11 are provided on the upper partition 13 and the lower partition 12. The outlet of the hot and cold air circulation pipe 2 is located below the upper partition 13, and the exchange pipe 9 is located above the lower partition 12. The bottom of the tank body 8 gradually shrinks to form a conical shape, and the water outlet pipe 6 is connected to the bottom of the conical shape.

[0016] After adopting the above scheme, when it is necessary to cool the inside of the furnace, the high-temperature gas in the furnace is pumped out through the hot and cold air circulation pipe and enters the tank body. The water in the chiller is supplied into the tank body through the water inlet pipe, flows downward from the through hole of the upper partition into the heat exchange pipes, then enters the conical shape through the through hole on the lower partition, and finally is discharged into the chiller (chiller) for cooling through the water outlet pipe. The high-temperature gas entering the tank body from the hot and cold air circulation pipe contacts the pipe wall of the heat exchange pipe, and the heat exchange pipe exchanges heat with the high-temperature gas. The cooled gas after heat exchange enters the furnace body again through the exchange pipe, realizing internal and external heat exchange, and repeating the cycle to achieve rapid cooling. The structure after adopting this scheme is reasonable and the cooling effect is good.

[0017] The above-described embodiments are only the preferred embodiments of the present invention, and do not limit the scope of implementation of the present invention. Therefore, all changes made according to the shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A vacuum sintering furnace rapid cooling system, comprising a furnace wall (1), characterized in that: A hot and cold air circulation pipe (2) is connected to the furnace wall (1), the hot and cold air circulation pipe (2) is connected to the heat exchange tank (5), the bottom of the heat exchange tank (5) is connected to an exchange pipe (9), the exchange pipe (9) is connected to the furnace wall (1), the top of the heat exchange tank (5) is connected to a water inlet pipe (3), the bottom of the heat exchange tank (5) is connected to a water outlet pipe (6), and the water inlet pipe (3) and the water outlet pipe (6) are respectively connected to a chiller (7).

2. The vacuum sintering furnace rapid cooling system according to claim 1, characterized in that: The heat exchange tank (5) comprises a tank body (8), a cylinder head (10), and a heat exchange tube (11), wherein a plurality of heat exchange tubes (11) are vertically installed in the tank body (8), a heat exchange area is reserved between adjacent heat exchange tubes (11), the outlet of the cold and hot air circulation pipe (2) is connected to one side of the upper part of the heat exchange tank (5), the exchange tube (9) is connected to one side of the lower part of the heat exchange tank (5), the cylinder head (10) is buckled onto the top of the tank body (8), the water inlet pipe (3) is connected to the cylinder head (10), and the bottom of the tank body (8) is connected to a water outlet pipe (6).

3. The vacuum sintering furnace rapid cooling system according to claim 2, characterized in that: An upper partition (13) is fixed to the upper part of the inner cavity of the tank body (8), and a lower partition (12) is fixed to the lower part of the inner cavity of the tank body (8). The heat exchange tube (11) is fixed between the upper partition (13) and the lower partition (12). Through holes matching the heat exchange tube (11) are provided on the upper partition (13) and the lower partition (12). The outlet of the cold and hot air circulation tube (2) is located below the upper partition (13), and the exchange tube (9) is located above the lower partition (12).

4. The rapid cooling system for a vacuum sintering furnace according to claim 2, characterized in that: The bottom of the tank body (8) gradually shrinks to form a conical cylinder, and the water outlet pipe (6) is connected to the bottom of the conical cylinder.

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