A furnace shell cooling structure and a vacuum nitriding furnace

Abstract

This utility model provides a furnace shell cooling structure, including a furnace door, a furnace body, and a cooling water pipeline system. One end of the furnace body is a closed end, and the other end is an open end. The furnace door is installed at the open end of the furnace body. A grid-like metal plate is respectively arranged on the outer wall of the furnace door, the outer wall of the closed end of the furnace body, the outer walls of both sides, and the outer wall of the top. Each grid-like metal plate is composed of several horizontal and several vertical plates intersecting each other, with equal spacing between the horizontal and vertical plates. The cooling water pipeline system passes through each grid-like metal plate to facilitate heat exchange between the cooling water and the grid-like metal plate area. This utility model also provides a vacuum nitriding furnace. This furnace shell cooling structure and vacuum nitriding furnace have the advantages of balancing cooling effect and equipment cost.

Description

Technical Field

[0001] This utility model relates to a nitriding device, specifically, to a furnace shell cooling structure and a vacuum nitriding furnace. Background Technology

[0002] A vacuum nitriding furnace is a heat treatment device that combines a vacuum environment with a nitriding process to nitrid materials such as metals or ceramics (e.g., silicon carbide). Its core technology lies in utilizing vacuum conditions to reduce oxidation interference and precisely controlling temperature, pressure, and nitrogen flow rate to allow nitrogen atoms to bond with the material. Because vacuum nitriding furnaces operate at high temperatures (500-650℃) and in a vacuum or positive pressure environment, prolonged heating of the furnace shell can lead to metal fatigue and deformation. If the high temperature is conducted to external support structures or electrical components, it can also shorten the equipment's lifespan. Therefore, cooling measures are necessary for the furnace shell.

[0003] There are two main traditional methods for cooling furnace shells. One is to install a cooling water jacket between the furnace shell and the furnace lining to maintain a low temperature through cooling water. Although this structure has a good cooling effect, the equipment cost is relatively high, and once the cooling water jacket is damaged, it is difficult to repair. The other method is to use cold air equipment to blow cold air into the furnace shell and cool it down through heat exchange with the cold air. This method is inexpensive, but the cooling effect is not very good.

[0004] In order to solve the above problems, people have been seeking an ideal technological solution. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a furnace shell cooling structure and a vacuum nitriding furnace that can balance cooling effect and equipment cost.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a furnace shell cooling structure, including a furnace door, a furnace body, and a cooling water pipeline system. One end of the furnace body is a closed end, and the other end is an open end. The furnace door is installed at the open end of the furnace body. Grid-like metal plates are respectively provided on the outer wall of the furnace door, the outer wall of the closed end of the furnace body, the outer walls on both sides, and the outer wall of the top. Each grid-like metal plate is composed of several horizontal vertical plates and several vertical vertical plates intersecting each other. The horizontal vertical plates and the vertical vertical plates are evenly spaced. The cooling water pipeline system is installed on each grid-like metal plate to facilitate heat exchange between the cooling water and the grid-like metal plate area.

[0007] Beneficial effects: By setting the mesh-like metal plates on the outer wall of the furnace door and the outer wall of the furnace body, on the one hand, a heat dissipation fin structure is formed, which facilitates the conduction of heat from the furnace and better heat exchange with the cooling water pipe system. On the other hand, a reinforcing plate structure is formed, which can strengthen the furnace door and the furnace body, making them less prone to deformation. This type of pipe is simpler to lay externally, and compared with the traditional cooling water jacket structure, the production and maintenance costs are lower.

[0008] Based on the above, the cooling water piping system includes two sets of end piping assemblies and one set of middle piping assemblies. The two sets of end piping assemblies are respectively installed on the outside of the furnace door and the outside of the closed end of the furnace body, and the middle piping assembly is installed on the outside of the side walls and the top wall of the furnace body.

[0009] Beneficial effect: The end pipe assembly and the middle pipe assembly are independent of each other and do not interfere with the opening of the furnace door.

[0010] Based on the above, the end pipe assembly includes a vertical inlet pipe, a vertical outlet pipe, and multiple horizontal pipes arranged from top to bottom. The vertical inlet pipe has an inlet at its top and is closed at its bottom. The vertical outlet pipe has an outlet at its top and is closed at its bottom. The multiple horizontal pipes penetrate the mesh-like metal plate, and the two ends of the multiple horizontal pipes are respectively connected to the side wall of the vertical inlet pipe and the side wall of the vertical outlet pipe.

[0011] Beneficial effects: The multiple horizontal pipes are arranged from top to bottom, which provides better fit with the furnace door and the closed end of the furnace body. The vertical water inlet pipe splits the water into the multiple horizontal pipes, and the multiple horizontal pipes converge into the vertical water outlet pipe, which can reduce the temperature difference of the cooling water in each of the horizontal pipes and make the cooling more uniform.

[0012] Based on the above, the central pipeline assembly includes a ground-mounted water inlet pipe, a ground-mounted water outlet pipe, and multiple U-shaped pipes with downward openings. The ground-mounted water inlet pipe is closed at both ends and has an inlet in the middle. The ground-mounted water outlet pipe is closed at both ends and has an outlet in the middle. The multiple U-shaped pipes are arranged from the open end to the closed end of the furnace body. The multiple U-shaped pipes penetrate the mesh-like metal plate. The two ends of the multiple U-shaped pipes are respectively connected to the side wall of the ground-mounted water inlet pipe and the side wall of the ground-mounted water outlet pipe.

[0013] Beneficial effects: The multiple U-shaped tubes are arranged from the open end to the closed end of the furnace body, which better fits the side walls and top wall of the furnace body. The water inlet pipe is directed to the multiple U-shaped tubes, and the multiple U-shaped tubes converge to the water outlet pipe, which can reduce the temperature difference of the cooling water in each U-shaped tube and make the cooling more uniform.

[0014] This utility model also provides a vacuum nitriding furnace, including the furnace shell cooling structure described above. Attached Figure Description

[0015] Figure 1 This is a side view of the furnace shell cooling structure in this utility model.

[0016] Figure 2 This is a schematic diagram of the installation structure of the end pipe assembly in this utility model.

[0017] Figure 3 This is a structural schematic diagram of the central pipe assembly in this utility model.

[0018] In the diagram: 1. Furnace door; 2. Furnace body; 3. Mesh metal plate; 4. End pipe assembly; 5. Middle pipe assembly; 31. Horizontal vertical plate; 32. Vertical vertical plate; 41. Vertical water inlet pipe; 42. Vertical water outlet pipe; 43. Horizontal pipe; 51. Ground-level water inlet pipe; 52. Ground-level water outlet pipe; 53. U-shaped pipe. Detailed Implementation

[0019] The technical solution of this utility model will be further described in detail below through specific embodiments. Example 1

[0020] like Figure 1-3 As shown, a furnace shell cooling structure includes a furnace door 1, a furnace body 2, and a cooling water pipeline system. One end of the furnace body 2 is a closed end, and the other end is an open end. The furnace door 1 is installed at the open end of the furnace body 2. A grid-like metal plate 3 is respectively provided on the outer wall of the furnace door 1, the outer wall of the closed end of the furnace body 2, the outer walls on both sides, and the outer wall of the top. Each grid-like metal plate 3 is composed of several horizontal vertical plates 31 and several vertical vertical plates 32 intersecting each other. Each horizontal vertical plate 31 and each vertical vertical plate 32 is equally spaced. The cooling water pipeline system is installed on each grid-like metal plate 3 to facilitate heat exchange between the cooling water and the area of ​​the grid-like metal plate 3.

[0021] The cooling water piping system specifically includes two sets of end pipe assemblies 4 and one set of middle pipe assembly 5. The two sets of end pipe assemblies 4 are respectively installed on the outside of the furnace door 1 and the outside of the closed end of the furnace body 2. The middle pipe assembly 5 is installed on the outside of the two side walls and the top wall of the furnace body 2. The end pipe assembly 4 and the middle pipe assembly 5 are independent of each other, which facilitates the opening of the furnace door 1.

[0022] Working principle: The mesh-like metal plates 3 installed on the outer walls of the furnace door 1 and the furnace body 2 form a heat dissipation structure, which is conducive to the conduction of heat from the furnace. Cooling water flows in the cooling water pipeline system, so the cooling water and the mesh-like metal plate 3 area can have good heat exchange and achieve a good cooling effect. On the other hand, they also form a reinforcing plate structure. The mesh-like metal plates 3 strengthen the furnace door 1 and the furnace body 2, making them less prone to deformation. This type of pipeline is simpler to lay externally, and the production and maintenance costs are also lower compared with the traditional cooling water jacket structure.

[0023] To achieve faster and more uniform cooling, the end pipe assembly 4 specifically includes a vertical inlet pipe 41, a vertical outlet pipe 42, and multiple horizontal pipes 43 arranged from top to bottom. The vertical inlet pipe 41 has an inlet at its top and is closed at its bottom. The vertical outlet pipe 42 has an outlet at its top and is closed at its bottom. The multiple horizontal pipes 43 penetrate the mesh metal plate 3. The two ends of the multiple horizontal pipes 43 are respectively connected to the side walls of the vertical inlet pipe 41 and the vertical outlet pipe 42. The multiple horizontal pipes 43 fit well with the furnace door 1 and the closed end of the furnace body 2. The vertical inlet pipe 41 diverts water to the multiple horizontal pipes 43, and the multiple horizontal pipes 43 converge back to the vertical outlet pipe 42, which can reduce the temperature difference of the cooling water in each of the horizontal pipes 43 and make the cooling more uniform.

[0024] The central pipe assembly 5 specifically includes a ground-mounted water inlet pipe 51, a ground-mounted water outlet pipe 52, and multiple downward-facing U-shaped pipes 53. The ground-mounted water inlet pipe 51 is closed at both ends and has an inlet in the middle. The ground-mounted water outlet pipe 52 is closed at both ends and has an outlet in the middle. The multiple U-shaped pipes 53 are arranged from the open end to the closed end of the furnace body 2 and penetrate the mesh metal plate 3. The two ends of the multiple U-shaped pipes 53 are respectively connected to the side wall of the ground-mounted water inlet pipe 51 and the side wall of the ground-mounted water outlet pipe 52. The multiple U-shaped pipes 53 have a better fit with the side walls and top wall of the furnace body 2. The water inlet pipe 51 diverts water to the multiple U-shaped pipes 53, and the multiple U-shaped pipes 53 converge to the ground-mounted water outlet pipe 52, which can reduce the temperature difference of the cooling water in each U-shaped pipe 53 and make the cooling more uniform. Example 2

[0025] This utility model also provides a vacuum nitriding furnace, including the furnace shell cooling structure as described in Example 1.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A furnace shell cooling structure, characterized by: The furnace includes a furnace door, a furnace body, and a cooling water piping system. One end of the furnace body is closed, and the other end is open. The furnace door is installed at the open end of the furnace body. Grid-like metal plates are respectively installed on the outer wall of the furnace door, the outer wall of the closed end of the furnace body, the outer walls on both sides, and the outer wall of the top. Each grid-like metal plate is composed of several horizontal and several vertical plates intersecting each other. The horizontal and vertical plates are evenly spaced. The cooling water piping system passes through each grid-like metal plate to facilitate heat exchange between the cooling water and the grid-like metal plate area.

2. The furnace shell cooling structure according to claim 1, characterized in that: The cooling water piping system includes two sets of end piping assemblies and one set of middle piping assemblies. The two sets of end piping assemblies are respectively installed on the outside of the furnace door and the outside of the closed end of the furnace body. The middle piping assembly is installed on the outside of the side walls and the top wall of the furnace body.

3. The furnace shell cooling structure according to claim 2, characterized by: The end pipe assembly includes a vertical inlet pipe, a vertical outlet pipe, and multiple horizontal pipes arranged from top to bottom. The vertical inlet pipe has an inlet at its top and is closed at its bottom. The vertical outlet pipe has an outlet at its top and is closed at its bottom. The multiple horizontal pipes pass through the mesh-like metal plate, and the two ends of the multiple horizontal pipes are respectively connected to the side wall of the vertical inlet pipe and the side wall of the vertical outlet pipe.

4. The furnace shell cooling structure according to claim 3, characterized in that: The central pipeline assembly includes a ground-mounted water inlet pipe, a ground-mounted water outlet pipe, and multiple U-shaped pipes with downward openings. The ground-mounted water inlet pipe is closed at both ends and has an inlet in the middle. The ground-mounted water outlet pipe is closed at both ends and has an outlet in the middle. The multiple U-shaped pipes are arranged from the open end to the closed end of the furnace body and penetrate the mesh-like metal plate. The two ends of the multiple U-shaped pipes are respectively connected to the side wall of the ground-mounted water inlet pipe and the side wall of the ground-mounted water outlet pipe.

5. A vacuum nitriding furnace, characterized in that: Includes the furnace shell cooling structure as described in any one of claims 1-4.

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