Nitrogen input device in metal vacuum heat treatment

Abstract

The utility model discloses a nitrogen input device in metal vacuum heat treatment, which relates to the technical field of heat treatment and comprises a heat treatment tank, the heat treatment tank is of a cylindrical tank structure, a gas inlet input pipe is arranged at the bottom of the outer wall of the heat treatment tank, and a gas connecting port is arranged at the bottom end of the gas inlet input pipe. A heat treatment cavity is formed in the heat treatment tank, and a plurality of nitrogen outlets are formed in the bottom of the heat treatment cavity at equal intervals according to the circumference of the inner wall of the heat treatment cavity. The plurality of nitrogen outlets are formed in the bottom of the heat treatment cavity, and nitrogen is sprayed outwards from the bottom of the heat treatment cavity and slowly floats upwards in the heat treatment cavity, so that the nitrogen permeates from the surface of the metal bottom in the upward floating process, and then the nitrogen flows into the heat treatment cavity along with the upward floating process of the nitrogen. Therefore, complete and uniform permeation on the surface of the metal is realized, and the condition of non-uniform nitriding at the upper and lower positions of the surface of the metal is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of heat treatment, in particular to a nitrogen input device for metal vacuum heat treatment. Background Art

[0002] During the metal vacuum heat treatment process, the nitrogen input device is mainly used to control and maintain the atmosphere in the furnace. Since vacuum heat treatment requires extremely low pressure, this usually means that air and other gases need to be pumped out of the furnace to achieve the required vacuum level. However, in some cases, a small amount of nitrogen needs to be input into the furnace to maintain a specific nitrogen atmosphere, which is necessary to prevent oxidation and decarburization of the metal surface.

[0003] The nitrogen input device generally includes the following parts:

[0004] Nitrogen storage tank: used to store high-pressure nitrogen to ensure sufficient nitrogen supply.

[0005] Pressure reducing valve: reduces the pressure of nitrogen to a level that is safe for use and can precisely control the pressure.

[0006] Flow meter: used to measure and adjust the flow of nitrogen to ensure the stability of the flow.

[0007] Solenoid valve: controls the on and off of nitrogen to achieve automatic control.

[0008] Input pipeline: The pipeline system that transports nitrogen from the pressure reducing valve to the furnace.

[0009] In actual operation, these devices are monitored and adjusted by the control system to ensure that the input of nitrogen is controllable and stable during the entire heat treatment process. The purpose of this is to ensure the quality of metal heat treatment and the performance of the final product. In the actual use of the existing metal vacuum heat treatment tank, the nitrogen port inside the metal vacuum heat treatment tank is evenly arranged on the inner wall surface of the heat treatment tank. Since nitrogen is an inert gas, nitrogen will float inside the heat treatment tank, resulting in uneven nitriding of the metal surface. Utility Model Content

[0010] In view of this, the purpose of the utility model is to provide a nitrogen input device for metal vacuum heat treatment, so as to solve the problem that in actual operation, these devices are monitored and adjusted by a control system to ensure that the input of nitrogen is controllable and stable during the entire heat treatment process. The purpose of doing so is to ensure the quality of metal heat treatment and the performance of the final product. Existing, in the actual use of the metal vacuum heat treatment tank, the nitrogen port inside the metal vacuum heat treatment tank is evenly arranged on the inner wall surface of the heat treatment tank, and because nitrogen is an inert gas, nitrogen will float inside the heat treatment tank, thereby causing the technical problem of uneven nitriding of the metal surface.

[0011] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0012] A nitrogen input device for metal vacuum heat treatment comprises a heat treatment tank, the heat treatment tank is configured as a cylindrical tank structure, an air intake input pipe is arranged at the bottom of the outer wall of the heat treatment tank, an air inlet is arranged at the bottom of the air intake input pipe, a heat treatment chamber is arranged inside the heat treatment tank, a plurality of nitrogen outlets are arranged at equal intervals at the bottom of the heat treatment chamber inner wall according to the circumference, an air cavity channel is arranged at the bottom of the heat treatment chamber, each of the nitrogen outlets is communicated with the air cavity channel, and the air cavity channel is communicated with the air intake input pipe.

[0013] As a preferred technical solution of the utility model, a solenoid valve is provided in the middle of the air intake pipe.

[0014] As a preferred technical solution of the utility model, the bottom of the heat treatment tank is fixed to the bottom end of the fixed base, the bottom end of the fixed base is provided with four legs, the bottom end of each leg is provided with a walking wheel, and the walking wheel is a universal wheel.

[0015] As a preferred technical solution of the utility model, the outer wall of the heat treatment tank is provided with a placement port connected to the heat treatment chamber, and a sealing door plate is installed on the surface of the placement port, and the sealing door plate is sealed and fixed by bolt locking.

[0016] As a preferred technical solution of the utility model, a servo motor is fixedly installed on the top of the heat treatment tank, a rotating rod is rotatably connected to the middle of the inner wall of the heat treatment chamber of the heat treatment tank, the top of the rotating rod is fixedly connected to the output shaft of the servo motor, and a plurality of suspension brackets are arranged on the outer wall of the rotating rod at equal intervals around the circumference, and a suspension rod is arranged on the surface of each suspension bracket.

[0017] As a preferred technical solution of the utility model, a nitrogen tank is provided at the bottom end of the fixed base, a connecting air pipe is provided at the top end of the nitrogen tank, a snap-on quick connector is provided at the top end of the connecting air pipe, and the snap-on quick connector is snap-fitted and sealed to the air inlet.

[0018] As a preferred technical solution of the utility model, there are three nitrogen tanks in total, and a series pipe is arranged between the three nitrogen tanks to connect them in series. A nitrogen pressure reducing valve is arranged at the top of each nitrogen tank.

[0019] As a preferred technical solution of the utility model, a gas tanker is provided at the bottom end of the fixed base, a placement groove is provided at the top of the gas tanker, three gas tank positioning grooves are provided at the bottom end of the placement groove, and the three nitrogen tanks are respectively placed in three different gas tank positioning grooves.

[0020] The beneficial effects of the utility model are:

[0021] The utility model is provided with a heat treatment chamber inside a heat treatment tank, a plurality of nitrogen outlets are provided at equal intervals at the bottom of the heat treatment chamber according to the circumference of the inner wall of the heat treatment chamber, an air cavity channel is provided at the bottom of the heat treatment chamber, each nitrogen outlet is communicated with the air cavity channel, and the air cavity channel is communicated with an air inlet input pipe. Therefore, the utility model is provided with a plurality of nitrogen outlets at the bottom of the heat treatment chamber, nitrogen is sprayed outward from the bottom of the heat treatment chamber, and slowly floats upward inside the heat treatment chamber, so that the nitrogen penetrates from the bottom surface of the metal in the process of floating upward, and then gradually penetrates to the top of the metal as the nitrogen floats upward, so as to achieve complete and uniform penetration of the metal surface, and effectively avoid the situation that the upper and lower positions of the metal surface are not uniformly nitrided.

[0022] The utility model arranges three nitrogen tanks at the bottom of the fixed base, and the three nitrogen tanks are connected in series through series pipes to increase the gas source amount, thereby effectively improving the stability of nitrogen supply.

[0023] The utility model drives the metal parts suspended on the suspension frame and the suspension rod to rotate in the heat treatment chamber by the rotation of the rotation rod in the heat treatment chamber, so that the surface of the metal parts is nitrided evenly.

[0024] The utility model provides a gas tanker at the bottom end of a fixed base, and places three nitrogen tanks in the gas tanker respectively. The nitrogen tanks can be easily transferred by using the gas tanker, and can be quickly separated and connected with the gas inlet through a snap-on quick connector, so that it is convenient to replace the nitrogen tanks later.

[0025] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1This is a schematic diagram of the appearance and structure of the nitrogen input device for metal vacuum heat treatment of the utility model;

[0027] Figure 2 It is a front cross-sectional structural schematic diagram of a nitrogen input device for metal vacuum heat treatment of the utility model;

[0028] Figure 3 It is a schematic diagram of the top cross-sectional structure of the heat treatment tank of the utility model;

[0029] In the figure: walking wheel 1, outrigger 2, fixed base 3, heat treatment tank 4, solenoid valve 5, air inlet pipe 6, sealing door panel 7, servo motor 8, air inlet 9, placement port 10, rotating rod 11, suspension frame 12, suspension rod 13, heat treatment chamber 14, air chamber channel 15, nitrogen outlet 16, gas tank truck 17, nitrogen tank 18, gas tank positioning groove 19, placement groove 20, series pipe 21, nitrogen pressure reducing valve 22, snap-on quick connector 23, connecting air pipe 24. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] In the above description of the utility model, it should be noted that the terms "one side", "the other side", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0034] In addition, the term "same" does not mean that the parts must be absolutely the same, but slight differences are allowed. The term "vertical" only means that the positional relationship between the parts is more vertical than "parallel", and does not mean that the structure must be completely vertical, but can be slightly tilted.

[0035] Embodiment 1

[0036] See also Figure 1-3 , is a technical solution provided by the utility model: a nitrogen input device for metal vacuum heat treatment, comprising a heat treatment tank 4, the heat treatment tank 4 is configured as a cylindrical tank structure, an air intake input pipe 6 is arranged at the bottom of the outer wall of the heat treatment tank 4, and an air inlet 9 is arranged at the bottom end of the air intake input pipe 6, a heat treatment chamber 14 is arranged inside the heat treatment tank 4, a plurality of nitrogen outlets 16 are arranged at equal intervals at the bottom of the heat treatment chamber 14 according to the circumference of the inner wall of the heat treatment chamber 14, an air cavity channel 15 is arranged at the bottom of the heat treatment chamber 14, each of the nitrogen outlets 16 is communicated with the air cavity channel 15, and the air cavity channel 15 is communicated with the air intake input pipe 6.

[0037] The utility model is provided with a heat treatment chamber 14 inside the heat treatment tank 4, and a plurality of nitrogen outlets 16 are provided at equal intervals at the bottom of the heat treatment chamber 14 according to the circumference of the inner wall of the heat treatment chamber 14. An air cavity channel 15 is provided at the bottom of the heat treatment chamber 14, and each nitrogen outlet 16 is communicated with the air cavity channel 15, and the air cavity channel 15 is communicated with the air inlet input pipe 6. Therefore, the utility model is provided with a plurality of nitrogen outlets 16 at the bottom of the heat treatment chamber 14, and nitrogen is sprayed outward from the bottom of the heat treatment chamber 14, and slowly floats upward inside the heat treatment chamber 14, so that the nitrogen penetrates from the bottom surface of the metal in the process of floating upward, and then gradually penetrates into the top of the metal as the nitrogen floats upward, thereby achieving complete and uniform penetration of the metal surface, and effectively avoiding the uneven nitriding of the upper and lower positions of the metal surface.

[0038] A solenoid valve 5 is provided in the middle of the air inlet pipe 6 to facilitate the control of the inlet and outlet of the air source.

[0039] The bottom of the heat treatment tank 4 is fixed to the bottom end of the fixed base 3. The bottom end of the fixed base 3 is provided with four legs 2. The bottom end of each leg 2 is provided with a walking wheel 1. The walking wheel 1 is a universal wheel, which is convenient for moving the heat treatment tank 4.

[0040] The outer wall of the heat treatment tank 4 is provided with a placement opening 10 connected to the heat treatment chamber 14, and a sealing door panel 7 is installed on the surface of the placement opening 10. The sealing door panel 7 is sealed and fixed by bolts to facilitate the later opening of the sealing door panel 7 to take out or put in metal parts from the heat treatment chamber 14.

[0041] A servo motor 8 is fixedly installed on the top of the heat treatment tank 4, and a rotating rod 11 is rotatably connected to the middle of the inner wall of the heat treatment chamber 14 of the heat treatment tank 4. The top of the rotating rod 11 is fixedly connected to the output shaft of the servo motor 8, and a plurality of suspension brackets 12 are arranged on the outer wall of the rotating rod 11 at equal intervals around the circumference, and a suspension rod 13 is arranged on the surface of each suspension bracket 12.

[0042] The utility model drives the metal parts suspended on the suspension frame 12 and the suspension rod 13 to rotate in the heat treatment chamber 14 by rotating the rotation rod 11 in the heat treatment chamber 14, so that the surface of the metal parts is nitrided uniformly.

[0043] Example 2

[0044] See also Figure 1-3 , which is another technical solution provided by the utility model. This embodiment is similar to the above-mentioned embodiment 1, and the similarities are not described in this embodiment. The specific differences are:

[0045] A nitrogen input device for metal vacuum heat treatment comprises a heat treatment tank 4, wherein the heat treatment tank 4 is configured as a cylindrical tank structure, an air intake input pipe 6 is provided at the bottom of the outer wall of the heat treatment tank 4, and an air receiving port 9 is provided at the bottom end of the air intake input pipe 6, a heat treatment chamber 14 is provided inside the heat treatment tank 4, a plurality of nitrogen outlets 16 are provided at the bottom of the heat treatment chamber 14 at equal intervals along the circumference of the inner wall of the heat treatment chamber 14, an air cavity channel 15 is provided at the bottom of the heat treatment chamber 14, and each of the nitrogen outlets 16 is communicated with the air cavity channel 15, and the air cavity channel 15 is communicated with the air intake input pipe 6.

[0046] The utility model is provided with a heat treatment chamber 14 inside the heat treatment tank 4, and a plurality of nitrogen outlets 16 are provided at equal intervals at the bottom of the heat treatment chamber 14 according to the circumference of the inner wall of the heat treatment chamber 14. An air cavity channel 15 is provided at the bottom of the heat treatment chamber 14, and each nitrogen outlet 16 is communicated with the air cavity channel 15, and the air cavity channel 15 is communicated with the air inlet input pipe 6. Therefore, the utility model is provided with a plurality of nitrogen outlets 16 at the bottom of the heat treatment chamber 14, and nitrogen is sprayed outward from the bottom of the heat treatment chamber 14, and slowly floats upward inside the heat treatment chamber 14, so that the nitrogen penetrates from the bottom surface of the metal in the process of floating upward, and then gradually penetrates into the top of the metal as the nitrogen floats upward, thereby achieving complete and uniform penetration of the metal surface, and effectively avoiding the uneven nitriding of the upper and lower positions of the metal surface.

[0047] A nitrogen tank 18 is provided at the bottom end of the fixed base 3, a connecting air pipe 24 is provided at the top end of the nitrogen tank 18, a snap-on quick connector 23 is provided at the top end of the connecting air pipe 24, and the snap-on quick connector 23 is snap-fitted and sealed with the air inlet 9, and can be quickly separated and connected with the air inlet 9 through the snap-on quick connector 23.

[0048] There are three nitrogen tanks 18 in total, and a series pipe 21 is arranged between the three nitrogen tanks 18 to connect them in series. A nitrogen pressure reducing valve 22 is arranged at the top of each nitrogen tank 18 to facilitate controlling the internal pressure of the nitrogen tank 18.

[0049] The utility model provides three nitrogen tanks 18 at the bottom of the fixed base 3, and the three nitrogen tanks 18 are connected in series through series pipes 21 to increase the gas source amount, thereby effectively improving the stability of nitrogen supply.

[0050] A gas tanker 17 is disposed at the bottom end of the fixed base 3 , a placement groove 20 is provided at the top end of the gas tanker 17 , and three gas tank positioning grooves 19 are disposed at the bottom end of the placement groove 20 , and the three nitrogen tanks 18 are respectively placed in three different gas tank positioning grooves 19 .

[0051] The utility model provides a gas tanker 17 at the bottom end of the fixed base 3, and places three nitrogen tanks 18 in the gas tanker 17 respectively. The gas tanker 17 can be used to easily transfer the nitrogen tanks 18, and can be quickly separated and connected with the gas inlet 9 through the snap-on quick connector 23, so that it is convenient to replace the nitrogen tanks 18 later.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A nitrogen input device for metal vacuum heat treatment, comprising a heat treatment tank (4), characterized in that: The heat treatment tank (4) is configured as a cylindrical tank structure, an air inlet pipe (6) is provided at the bottom of the outer wall of the heat treatment tank (4), an air inlet port (9) is provided at the bottom end of the air inlet pipe (6), a heat treatment chamber (14) is provided inside the heat treatment tank (4), a plurality of nitrogen outlets (16) are provided at equal intervals at the bottom of the heat treatment chamber (14) according to the circumference of the inner wall of the heat treatment chamber (14), an air cavity channel (15) is provided at the bottom of the heat treatment chamber (14), each of the nitrogen outlets (16) is communicated with the air cavity channel (15), and the air cavity channel (15) is communicated with the air inlet pipe (6).

2. The nitrogen input device for metal vacuum heat treatment according to claim 1, characterized in that: A solenoid valve (5) is provided in the middle of the air intake pipe (6).

3. The nitrogen input device for metal vacuum heat treatment according to claim 1, characterized in that: The bottom of the heat treatment tank (4) is fixed to the bottom end of the fixed base (3), and the bottom end of the fixed base (3) is provided with four legs (2), and the bottom end of each leg (2) is provided with a running wheel (1), and the running wheel (1) is a universal wheel.

4. The nitrogen input device for metal vacuum heat treatment according to claim 1, characterized in that: The outer wall of the heat treatment tank (4) is provided with a placement opening (10) connected to the heat treatment chamber (14), and a sealing door panel (7) is installed on the surface of the placement opening (10).

5. The nitrogen input device for metal vacuum heat treatment according to claim 4, characterized in that: A servo motor (8) is fixedly mounted on the top of the heat treatment tank (4); a rotating rod (11) is rotatably connected to the middle of the inner wall of the heat treatment chamber (14) of the heat treatment tank (4); the top of the rotating rod (11) is fixedly connected to the output shaft of the servo motor (8); a plurality of suspension brackets (12) are arranged on the outer wall of the rotating rod (11) at equal intervals around the circumference; and a suspension rod (13) is arranged on the surface of each suspension bracket (12).

6. The nitrogen input device for metal vacuum heat treatment according to claim 3, characterized in that: A nitrogen tank (18) is arranged at the bottom end of the fixed base (3), a connecting air pipe (24) is arranged at the top end of the nitrogen tank (18), a snap-on quick connector (23) is arranged at the top end of the connecting air pipe (24), and the snap-on quick connector (23) is snap-fitted and sealed to the air inlet (9).

7. The nitrogen input device for metal vacuum heat treatment according to claim 6, characterized in that: There are three nitrogen tanks (18) in total, and a series pipe (21) is provided between the three nitrogen tanks (18) so as to be connected in series with each other. A nitrogen pressure reducing valve (22) is provided at the top of each nitrogen tank (18).

8. The nitrogen input device for metal vacuum heat treatment according to claim 7, characterized in that: A gas tanker (17) is arranged at the bottom end of the fixed base (3), a placement groove (20) is provided at the top end of the gas tanker (17), three gas tank positioning grooves (19) are arranged at the bottom end of the placement groove (20), and the three nitrogen tanks (18) are respectively placed in three different gas tank positioning grooves (19).

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