Gas distribution chamber for cemented carbide nitriding

Abstract

The utility model discloses a gas distribution reaction cavity for cemented carbide nitriding, which comprises a cavity body, a ventilation frame fixedly connected inside the cavity body in a symmetrical manner, a valve plate slidably installed on the ventilation frame, a spring arranged between the ventilation frame and the valve plate, the upper end of the spring fixedly connected with the valve plate, and the lower end of the spring fixedly connected with the ventilation frame. The cavity body comprises an outer shell, a first gas injection pipe fixedly connected to the upper end of the outer shell, and a second gas injection pipe fixedly connected to the lower end of the outer shell. The gas pressure acts on the valve plate, the valve plate slides to the center of the cavity body against the spring force, the space between the ventilation frame and the valve plate is opened, the gas enters the middle part of the cavity body, the gas is input from the upper and lower ends of the cavity body, the gas enters the middle part of the cavity body, the spring force acts on the ventilation frame, the gap is self-adaptive to the pressure, the local pressure loss is prevented from mixing into the non-reaction area, the ventilation frame and the valve plate gap maintain the uniform pressure, and the uniformity of the gas reaction is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of gas reaction equipment, and particularly relates to a gas uniform distribution reaction chamber for hard alloy nitriding. Background Technology

[0002] The gas uniform distribution reaction chamber for cemented carbide nitriding employs a perforated plate, a flow guiding device, and a gas diversion structure design. After the gas enters through the inlet, it is uniformly dispersed inside the reaction chamber through a scientifically arranged flow guiding channel and precision-machined micropores. This allows the cemented carbide workpiece to come into full and uniform contact with the nitriding gas within the chamber, effectively ensuring a stable distribution of temperature, pressure, and gas concentration during the nitriding process, thereby achieving a high-quality and consistent nitriding treatment effect.

[0003] When the gas pressure in the gas uniform distribution reaction chamber for cemented carbide nitriding is temporarily insufficient, the gas at the other end can easily flow into the non-reaction area, causing local gas to react preferentially, resulting in uneven overall reaction. This leads to the problem that conventional gas uniform distribution reaction chambers for cemented carbide nitriding have relatively low practicality.

[0004] Therefore, we propose to solve the above problems by using a gas-uniformly distributed reaction chamber for cemented carbide nitriding. Utility Model Content

[0005] The purpose of this invention is to solve the problem of low practicality of conventional gas uniform distribution reaction chambers for cemented carbide nitriding, and to propose a gas uniform distribution reaction chamber for cemented carbide nitriding.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A gas-distributed reaction chamber for cemented carbide nitriding includes a chamber body. A venting frame is symmetrically fixedly connected inside the chamber body. A valve plate is slidably mounted on the venting frame. A spring is provided between the venting frame and the valve plate. The upper end of the spring is fixedly connected to the valve plate, and the lower end of the spring is fixedly connected to the venting frame. When the valve plate is subjected to external gas pressure, the pressure causes the valve plate to overcome the spring force and slide towards the center of the chamber, opening the space between the venting frame and the valve plate. This allows gas to enter the middle of the chamber. Similarly, gas is input from both the upper and lower ends of the chamber, also entering the middle. The spring force acts on the venting frame, causing the gap to adapt to the pressure, preventing localized pressure loss and mixing into non-reactive areas. This maintains uniform pressure at the gap between the venting frame and the valve plate, improving the uniformity of the gas reaction.

[0008] Preferably, the cavity includes an outer shell, a first air injection pipe is fixedly connected to the upper end of the outer shell, a second air injection pipe is fixedly connected to the lower end of the outer shell, and an exhaust nozzle is fixedly connected to the middle of the outer shell. The first and second air injection pipes facilitate the connection of an external air injection pipe, and the exhaust nozzle facilitates the connection of an external air supply pipe.

[0009] Preferably, the venting frame includes a guide frame, and an air baffle plate is fixedly connected to the outside of the guide frame. The upper end of the air baffle plate has a perforated exhaust port, and the outer periphery of the air baffle plate is fixedly connected to the inner wall of the cavity. A valve plate is used to block the exhaust port. When the air pressure is insufficient, the spring force acts upward on the valve plate, causing the valve plate to close or reduce the gap between the exhaust port and the valve plate. When the air pressure increases, the opening of the exhaust port increases, allowing the venting frame and valve plate to adapt to the different gap sizes.

[0010] Preferably, the valve plate includes a lifting column, which is slidably installed within a guide frame. A spring is movably sleeved on the lifting column, with its lower end fixedly connected to the guide frame. A connecting plate is fixedly connected to the upper end of the lifting column, which is also fixedly connected to the upper end of the spring. Baffles are uniformly fixedly connected to the lower end of the lifting column. When the baffles are subjected to pressure, the pressure acts on the lifting column, causing it to move downwards against the connecting plate. This causes the connecting plate to move downwards against the spring's elasticity. When the air pressure is insufficient, the spring's elasticity drives the connecting plate to act on the lifting column, causing it to move upwards against the baffles, thus facilitating the valve plate's adaptive adaptation to air pressure.

[0011] Preferably, the valve plate further includes a movable ring, which is fixedly connected to the outer end of the baffle and slidably mounted on the inner wall of the housing. The sliding of the movable ring against the inner wall of the housing increases the stability of the contact surface between the valve plate and the housing.

[0012] Preferably, the valve plate further includes a gas equalization mesh, which is fixedly connected to the lower end of the movable ring. The gas equalization mesh is used to prevent reverse gas flow.

[0013] In summary, the technical effects and advantages of this utility model are as follows:

[0014] 1. When the valve plate is subjected to air pressure, the air pressure acts on the valve plate, causing the valve plate to slide open towards the center of the cavity against the elastic force of the spring. This opens the space between the vent frame and the valve plate, allowing gas to enter the middle of the cavity. Similarly, gas is input from the upper and lower ends of the cavity, allowing gas to enter the middle of the cavity. The elastic force of the spring acts on the vent frame, causing the gap to adapt to the pressure, preventing local pressure loss and mixing into the non-reactive area. This maintains uniform pressure at the gap between the vent frame and the valve plate, improving the uniformity of the gas reaction.

[0015] 2. By using the valve plate to block the exhaust port, when the air pressure is insufficient, the spring force acts upward on the valve plate, causing the valve plate to close or reduce the gap between the exhaust port and the valve plate. When the air pressure increases, the gap of the exhaust port is increased, which makes it easier for the ventilation frame and valve plate to adapt to the gap size.

[0016] 3. When the baffle is subjected to pressure, the pressure acts on the lifting column, causing the lifting column to act downward on the connecting plate, which in turn moves downward against the spring force. When the air pressure is insufficient, the spring force drives the connecting plate to act on the lifting column, causing the lifting column to act upward on the baffle, thus facilitating the valve plate to adapt to the air pressure. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall segmented structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the cavity segmentation structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the ventilation frame structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the valve plate structure of this utility model.

[0021] In the diagram: 2. Cavity; 3. Ventilation frame; 4. Valve plate; 5. Spring; 21. Outer shell; 22. First air injection pipe; 23. Second air injection pipe; 24. Exhaust nozzle; 31. Baffle plate; 32. Exhaust port; 33. Guide frame; 41. Movable ring; 42. Baffle plate; 43. Lifting column; 44. Connecting plate; 45. Air distribution network. Detailed Implementation

[0022] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments.

[0023] like Figure 1 As shown, the gas uniform distribution reaction chamber for hard alloy nitriding includes a chamber 2. A ventilation frame 3 is symmetrically fixedly connected inside the chamber 2. A valve plate 4 is slidably installed on the ventilation frame 3. A spring 5 is provided between the ventilation frame 3 and the valve plate 4. The upper end of the spring 5 is fixedly connected to the valve plate 4, and the lower end of the spring 5 is fixedly connected to the ventilation frame 3.

[0024] like Figure 1 and 2 As shown, the cavity 2 includes an outer shell 21. A first air injection pipe 22 is fixedly connected to the upper end of the outer shell 21, a second air injection pipe 23 is fixedly connected to the lower end of the outer shell 21, and an exhaust nozzle 24 is fixedly connected to the middle of the outer shell 21. The first air injection pipe 22 and the second air injection pipe 23 are used to connect with the air injection pipe, and the exhaust nozzle 24 is used to connect with the exhaust nozzle 24 air supply pipe.

[0025] like Figure 1 and 3As shown, the ventilation frame 3 includes a guide frame 33, and an air baffle 31 is fixedly connected to the outside of the guide frame 33. The upper end of the air baffle 31 has an exhaust port 32, and the outer periphery of the air baffle 31 is fixedly connected to the inner wall of the cavity 2. A valve plate 4 is used to block the exhaust port 32. When the air pressure is insufficient, the elastic force of the spring 5 acts upward on the valve plate 4, causing the valve plate 4 to close or reduce the gap between the exhaust port 32 and the valve plate 4. When the air pressure increases, the opening of the exhaust port 32 increases.

[0026] like Figure 1 and 4 As shown, the valve plate 4 includes a lifting column 43, which is slidably installed inside the guide frame 33. A spring 5 is movably sleeved on the lifting column 43, and the lower end of the spring 5 is fixedly connected to the guide frame 33. A connecting plate 44 is fixedly connected to the upper end of the lifting column 43, and the connecting plate 44 is fixedly connected to the upper end of the spring 5. Baffles 42 are evenly fixedly connected to the lower end of the lifting column 43. When the baffle 42 is subjected to pressure, the pressure acts on the lifting column 43, causing the lifting column 43 to act downward on the connecting plate 44, causing the connecting plate 44 to move downward against the elastic force of the spring 5. When the air pressure is insufficient, the elastic force of the spring 5 drives the connecting plate 44 to act on the lifting column 43, causing the lifting column 43 to act upward on the baffle 42.

[0027] like Figure 1 , 2 As shown in Figure 4, the valve plate 4 also includes a movable ring 41, which is fixedly connected to the outer end of the baffle 42 and slidably mounted on the inner wall of the housing 21. By utilizing the sliding of the movable ring 41 against the inner wall of the housing 21, the stability of the contact surface between the valve plate 4 and the housing 21 is increased.

[0028] like Figure 1 and 4 As shown, the valve plate 4 also includes a gas equalization mesh 45, which is fixedly connected to the lower end of the movable ring 41. The gas equalization mesh 45 is used to prevent reverse gas flow.

[0029] Working principle: When the valve plate 4 is subjected to air pressure, the air pressure acts on the valve plate 4, causing the valve plate 4 to slide open towards the center of the cavity 2 against the elastic force of the spring 5, opening the space between the vent frame 3 and the valve plate 4, allowing gas to enter the middle of the cavity 2. Similarly, gas is input from the upper and lower ends of the cavity 2, allowing gas to enter the middle of the cavity 2. Through the elastic force of the spring 5 acting on the vent frame 3, the gap adapts to the pressure, preventing local pressure loss and mixing into the non-reactive area, and maintaining uniform pressure at the gap between the vent frame 3 and the valve plate 4.

[0030] The above description is only a preferred embodiment of the utility model, but the protection scope of the utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed by the utility model, based on the technical solution and the utility model concept, should be included within the protection scope of the utility model.

[0031] The description briefly mentions the application direction of the utility model in relation to existing technologies known to those skilled in the art without modification, and combines them with the utility model to form a complete technology; it avoids excessive popularization of technologies known to those skilled in the art, in order to help those skilled in the art quickly understand the main content of the utility model.

Claims

1. A gas uniform distribution reaction chamber for nitriding of cemented carbide, characterized in that: Includes a cavity (2), inside which a ventilation frame (3) is symmetrically fixedly connected, and a valve plate (4) is slidably installed on the ventilation frame (3). A spring (5) is provided between the ventilation frame (3) and the valve plate (4). The upper end of the spring (5) is fixedly connected to the valve plate (4), and the lower end of the spring (5) is fixedly connected to the ventilation frame (3).

2. The gas uniform distribution reaction chamber for cemented carbide nitriding according to claim 1, characterized in that: The cavity (2) includes an outer shell (21), the upper end of which is fixedly connected to a first air injection pipe (22), the lower end of which is fixedly connected to a second air injection pipe (23), and the middle part of which is fixedly connected to an exhaust nozzle (24).

3. The gas uniform distribution reaction chamber for cemented carbide nitriding according to claim 2, characterized in that: The ventilation frame (3) includes a guide frame (33), and an air baffle (31) is fixedly connected to the outside of the guide frame (33). An exhaust port (32) is hollowed out at the upper end of the air baffle (31), and the outer periphery of the air baffle (31) is fixedly connected to the inner wall of the cavity (2).

4. The gas-distributed reaction chamber for cemented carbide nitriding according to claim 3, characterized in that: The valve plate (4) includes a lifting column (43), which is slidably installed in the guide frame (33). The spring (5) is movably sleeved on the lifting column (43). The lower end of the spring (5) is fixedly connected to the guide frame (33). The upper end of the lifting column (43) is fixedly connected to a connecting plate (44), which is fixedly connected to the upper end of the spring (5). The lower end of the lifting column (43) is uniformly fixedly connected to baffles (42).

5. The gas uniform distribution reaction chamber for cemented carbide nitriding according to claim 4, characterized in that: The valve plate (4) also includes a movable ring (41), which is fixedly connected to the outer end of the baffle (42) and is slidably installed on the inner wall of the outer shell (21).

6. The gas uniform distribution reaction chamber for cemented carbide nitriding according to claim 5, characterized in that: The valve plate (4) also includes an air distribution network (45), which is fixedly connected to the lower end of the movable ring (41).

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