CN114085963B

CN114085963B - Nitrogen-based atmosphere recycling device and method in gas quenching process

Info

Publication number: CN114085963B
Application number: CN202111417662.5A
Authority: CN
Inventors: 温以民; 孔金花; 苏阳; 杜斌; 闫九祥
Original assignee: LINYI JINLI MACHINERY CO Ltd
Current assignee: LINYI JINLI MACHINERY CO Ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2023-05-26
Anticipated expiration: 2041-11-26
Also published as: CN114085963A

Abstract

The invention relates to the technical field of nitrogen circulating devices, in particular to a nitrogen-based atmosphere recycling device in a gas quenching process, which comprises a high-temperature furnace, wherein one side of the high-temperature furnace is provided with a control box, a sealing mechanism is arranged on the high-temperature furnace, and a nitrogen mechanism, a gas supply mechanism and a gas medium mechanism are connected between the control box and the high-temperature furnace; the sealing mechanism is arranged so as to conveniently drive the high-temperature furnace door to be self-locked, and the gas tightness of the high-temperature furnace is improved while the high-temperature furnace is conveniently opened, so that gas leakage is avoided; the density characteristics among gases are conveniently utilized to recycle the corresponding gases through the arrangement of the nitrogen mechanism, the air supply mechanism and the gas medium mechanism, so that the gas use cost of heat treatment is reduced, and resources are saved.

Description

Nitrogen-based atmosphere recycling device and method in gas quenching process

Technical Field

The invention relates to the technical field of nitrogen circulating devices, in particular to a nitrogen-based atmosphere recycling device and method in a gas quenching process.

Background

Most of the existing gas quenching technologies use inert gas as a cooling medium, and low-temperature inert gas is utilized to flow through the surface of a workpiece to perform convection heat transfer so as to realize cooling of the workpiece. Compared with water quenching and oil quenching, the gas quenching has the advantages of uniform cooling and small deformation of the workpiece and the defect of insufficient cooling capacity. The heat exchange coefficient of liquid or nitrogen is very large, so that the problem of insufficient quenching cooling capacity of inert gas can be overcome, and the quenching coolant is relatively cheap and is an ideal and economic quenching coolant.

However, when nitrogen is used in the existing heat treatment, a disposable utilization mode is mostly adopted, and because the nitrogen is difficult to purify, the economic value is high, and the non-repeated utilization mode not only causes waste but also increases the cost of the heat treatment.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a nitrogen-based atmosphere recycling device and method in the gas quenching process.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a nitrogen-based atmosphere cyclic utilization device in gas quenching process, includes the high temperature furnace, one side of high temperature furnace is equipped with the control box, install sealing mechanism on the high temperature furnace, be connected with nitrogen mechanism, air feed mechanism and gas mechanism between control box and the high temperature furnace.

Specifically, sealing mechanism includes sealing door, the one end rotation of high temperature furnace is connected with sealing door, sliding connection has the draw-in lever on the high temperature furnace, it has the spring to contradict on the draw-in lever, the contact sleeve has been cup jointed on the draw-in lever.

Specifically, one side of the clamping rod is provided with a contact supporting rod, a rotating shaft is fixedly connected to the contact supporting rod, the rotating shaft is rotationally connected with the high-temperature furnace, a torsion spring is wound on the rotating shaft, one end of the torsion spring is clamped on the rotating shaft, and the other end of the torsion spring is clamped on the inner wall of the high-temperature furnace.

Specifically, one end cover of supporting the feeler lever is on the card pole, the conflict pole is close to the inside of card pole is equipped with the contact patch, the sealing door is contradicted on supporting the feeler lever, the one end of card pole extends to the outside of high temperature furnace, the block has the gag lever post on the card pole, the gag lever post rotates and connects the sealing door.

Specifically, nitrogen gas mechanism includes first gas bomb, the inside of control box is equipped with first gas bomb, the winding has first fixed band on the first gas bomb, the both ends fixed connection control box of first fixed band, be connected with first trachea on the first gas bomb.

Specifically, first gas tube runs through the control box and extends to the inside of high temperature furnace, the internally mounted of control box has first air pump, first solenoid valve and first filter, first air pump, first solenoid valve and first filter are installed respectively on first trachea.

Specifically, the air supply mechanism comprises a second air pipe, the second air pipe is arranged in the control box, one end of the second air pipe extends to the inside of the high-temperature furnace, and a filter cover is arranged on the side wall of the control box.

Specifically, the other end of the second air pipe extends into the filter cover, a second electromagnetic valve and a second air pump are arranged in the control box, and the second electromagnetic valve and the second air pump are arranged on the second air pipe.

Specifically, the gas mechanism that mediates includes the third trachea, the internally mounted of control box has the third trachea, the tracheal one end of third extends to the inside of high temperature furnace, one side fixedly connected with second fixed band of control box, the winding has the second gas bomb on the second fixed band.

Specifically, the other end of the third air pipe is connected with the second air storage bottle, a third air pump, a third electromagnetic valve and a second filter are arranged in the control box, and the third air pump, the third electromagnetic valve and the second filter are respectively installed on the third air pipe.

The method for recycling the nitrogen-based atmosphere in the gas quenching process comprises the following steps of:

s1: when the high-temperature furnace is used for heat treatment, workpieces are firstly transported into the high-temperature furnace one by one for heating, and the high-temperature furnace is enabled to obtain a good sealing effect through the sealing mechanism, so that gas leakage is avoided;

s2: then after heating is finished, the nitrogen mechanism is started to convey nitrogen into the high-temperature furnace, and a high-temperature workpiece is rapidly cooled through the characteristic of high heat exchange coefficient of the nitrogen, so that excellent mechanical properties of the workpiece are achieved, residual stress is eliminated, and metal cutting processability is improved;

s3: finally, in order to recycle high-value nitrogen, the gas mechanism is started to release carbon dioxide, the nitrogen is recycled through the nitrogen mechanism by utilizing the characteristic that the density of the carbon dioxide is greater than that of the nitrogen, in order to recycle the carbon dioxide with economic value, the gas supply mechanism is started, pumped air enters the high-temperature furnace to press concentrated carbon dioxide gas, so that the carbon dioxide is recycled into the gas mechanism, further, the gas density characteristic is utilized to recycle one by one, the heat treatment cost is reduced, and the resources are saved.

The beneficial effects of the invention are as follows:

(1) According to the nitrogen-based atmosphere recycling device and method in the gas quenching process, the sealing mechanism is arranged on the high-temperature furnace, the sealing mechanism is arranged so as to facilitate driving of self-locking of the high-temperature furnace door, the gas tightness of the high-temperature furnace is improved while opening is facilitated, and gas leakage is avoided, namely: when the sealing door needs to be closed to keep the tightness of the high-temperature furnace, the sealing door is directly pushed to be closed, the sealing door contacts and pushes the contact rod to deflect, the contact sleeve and the contact piece are made of materials with stronger adhesiveness, the contact piece and the contact sleeve are utilized to drive the clamping rod to move after the contact rod deflects, the clamping rod slides outwards, the limiting rod is enabled to be more conveniently contacted with the clamping rod to be limited, after the limiting rod is clamped onto the limiting rod, the contact piece is not in contact with the contact sleeve, the spring drives the clamping rod to shrink in automatic resetting, the clamping rod drives the limiting rod to be close to the high-temperature furnace, and finally, the sealing door is enabled to be attached to the high-temperature furnace with better effect, so that gas leakage or heat loss inside the high-temperature furnace can be avoided, and the use effect of the high-temperature furnace is improved.

(2) According to the nitrogen-based atmosphere recycling device and method in the gas quenching process, the nitrogen mechanism, the air supply mechanism and the gas medium mechanism are connected between the control box and the high-temperature furnace, the corresponding gas can be recycled by conveniently utilizing the density characteristics among the gases through the arrangement of the nitrogen mechanism, the air supply mechanism and the gas medium mechanism, the gas use cost of heat treatment is reduced, and resources are saved, namely: when the nitrogen is required to be conveyed into the high-temperature furnace for use, the first electromagnetic valve, the first air pump and the first filter are firstly started, the nitrogen in the first air storage bottle is pumped into the high-temperature furnace for use, a proper amount of nitrogen is input into the high-temperature furnace and then is closed, the nitrogen exchanges heat with the heat treated workpiece, the workpiece is rapidly cooled, the nitrogen purification cost is high due to difficult purification, the nitrogen is required to be recycled for use, the third electromagnetic valve, the third filter and the third air pump are started after the heat treatment is finished, the first electromagnetic valve and the first filter are started, the first air pump is started at the same time, the first air pump is started to reversely run, the gas in the second air storage bottle is conveyed into the high-temperature furnace, the carbon dioxide is firstly filled in the space of the high-temperature furnace from bottom to top due to the carbon dioxide being larger than the density of the nitrogen, the first air pump pumps the compressed nitrogen, the nitrogen is filtered by the first filter and returns to the first gas storage bottle for internal storage, thereby completing the purpose of recycling the nitrogen, at the moment, the inside of the high-temperature furnace is filled with carbon dioxide gas, as the carbon dioxide gas also has a certain economic value, the carbon dioxide is recycled again and a certain economic expenditure can be saved, the second air pump is started, the outside air is conveyed into the inside of the high-temperature furnace at high pressure, and because the density of the outside air is greater than that of the carbon dioxide, the carbon dioxide is extruded and concentrated in the bottom space of the high-temperature furnace by the high-pressure air, the third air pump, the third electromagnetic valve and the second filter are started at the moment, thereby recycling and storing the carbon dioxide into the second gas storage bottle, further facilitating the recycling of the gases with economic value one by utilizing the density characteristics of different gases, and greatly reducing the gas use cost of heat treatment, avoiding the waste of resources.

Drawings

The invention will be further described with reference to the drawings and examples.

FIG. 1 is a schematic diagram of the overall structure of a preferred embodiment of a nitrogen-based atmosphere recycling apparatus and method in a gas quenching process according to the present invention;

FIG. 2 is a schematic diagram of the connection structure of the nitrogen mechanism, the gas supply mechanism and the gas medium mechanism shown in FIG. 1;

FIG. 3 is a schematic view of the sealing mechanism shown in FIG. 1;

FIG. 4 is an enlarged schematic view of the portion A shown in FIG. 1;

FIG. 5 is an enlarged view of the portion B shown in FIG. 1;

FIG. 6 is a flow chart of a Cheng Zhongdan-based atmosphere recycling device and method for gas quenching provided by the invention.

In the figure: 1. the high-temperature furnace comprises a high-temperature furnace body, 2, a control box, 3, a sealing mechanism, 31, a sealing door, 32, a limiting rod, 33, a clamping rod, 34, a spring, 35, a contact sleeve, 36, a contact rod, 37, a rotating shaft, 38, a torsion spring, 39, a contact piece, 4, a nitrogen mechanism, 41, a first gas storage bottle, 42, a first fixing belt, 43, a first air pipe, 44, a first air pump, 45, a first electromagnetic valve, 46, a first filter, 5, an air supply mechanism, 51, a filter cover, 52, a second air pipe, 53, a second air pump, 54, a second electromagnetic valve, 6, a medium air mechanism, 61, a second gas storage bottle, 62, a second fixing belt, 63, a third air pipe, 64, a third air pump, 65, a third electromagnetic valve, 66 and a second filter.

Detailed Description

The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.

As shown in fig. 1-6, the nitrogen-based atmosphere recycling device in the gas quenching process comprises a high-temperature furnace 1, wherein a control box 2 is arranged on one side of the high-temperature furnace 1, a sealing mechanism 3 is arranged on the high-temperature furnace 1, and a nitrogen mechanism 4, a gas supply mechanism 5 and a gas-mediating mechanism 6 are connected between the control box 2 and the high-temperature furnace 1.

Specifically, the sealing mechanism 3 comprises a sealing door 31, one end of the high-temperature furnace 1 is rotatably connected with the sealing door 31, a clamping rod 33 is slidably connected to the high-temperature furnace 1, a spring 34 is abutted against the clamping rod 33, and a contact sleeve 35 is sleeved on the clamping rod 33.

Specifically, a contact supporting rod 36 is arranged on one side of the clamping rod 33, a rotating shaft 37 is fixedly connected to the contact supporting rod 36, the rotating shaft 37 is rotationally connected with the high-temperature furnace 1, a torsion spring 38 is wound on the rotating shaft 37, one end of the torsion spring 38 is clamped on the rotating shaft 37, and the other end of the torsion spring 38 is clamped on the inner wall of the high-temperature furnace 1.

Specifically, one end of the abutting rod 36 is sleeved on the clamping rod 33, a contact piece 39 is arranged in the abutting rod 36 close to the clamping rod 33, the sealing door 31 abuts against the abutting rod 36, one end of the clamping rod 33 extends to the outside of the high-temperature furnace 1, a limiting rod 32 is clamped on the clamping rod 33, and the limiting rod 32 is rotationally connected with the sealing door 31; be equipped with sealing mechanism 3 on the high temperature furnace 1, through sealing mechanism 3's setting and then be convenient for drive convenient high temperature furnace gate auto-lock, improve when conveniently opening the gas tightness of high temperature furnace 1 avoids gas leakage, saves the resource, namely: when the sealing door 31 needs to be closed to keep the sealing performance of the high-temperature furnace 1, the sealing door 31 is directly pushed to be closed, the sealing door 31 contacts and pushes the abutting rod 36 to deflect, the contact sleeve 35 and the contact piece 39 are made of materials with strong adhesiveness, the abutting rod 36 deflects and then drives the clamping rod 33 to move by the aid of the contact piece 39 and the contact sleeve 35, the clamping rod 33 slides outwards, so that the limiting rod 32 is more convenient to contact the clamping rod 33 to be limited, when the limiting rod 32 is clamped onto the limiting rod 32, the contact piece 39 is not in contact with the contact sleeve 35 at the moment, the spring 34 drives the clamping rod 33 to shrink in an automatic resetting process, the clamping rod 33 drives the limiting rod 32 to be close to the high-temperature furnace 1, and finally the sealing door 31 is attached to the high-temperature furnace 1, thereby the effect of gas leakage or heat loss inside the high-temperature furnace 1 can be avoided, and the use effect of the high-temperature furnace 1 is improved.

Specifically, the nitrogen mechanism 4 includes a first gas bomb 41, a first gas bomb 41 is disposed in the control box 2, a first fixing belt 42 is wound on the first gas bomb 41, two ends of the first fixing belt 42 are fixedly connected with the control box 2, and a first gas pipe 43 is connected to the first gas bomb 41.

Specifically, the first air pipe 43 penetrates the control box 2 and extends to the inside of the high temperature furnace 1, a first air pump 44, a first electromagnetic valve 45 and a first filter 46 are installed in the control box 2, and the first air pump 44, the first electromagnetic valve 45 and the first filter 46 are respectively installed on the first air pipe 43.

Specifically, the air supply mechanism 5 includes a second air pipe 52, the second air pipe 52 is disposed in the control box 2, one end of the second air pipe 52 extends to the inside of the high temperature furnace 1, and a filter cover 51 is mounted on a side wall of the control box 2.

Specifically, the other end of the second air pipe 52 extends into the filter cover 51, a second electromagnetic valve 54 and a second air pump 53 are arranged in the control box 2, and the second electromagnetic valve 54 and the second air pump 53 are installed on the second air pipe 52.

Specifically, the gas mechanism 6 includes a third gas pipe 63, a third gas pipe 63 is installed in the control box 2, one end of the third gas pipe 63 extends to the inside of the high temperature furnace 1, a second fixing belt 62 is fixedly connected to one side of the control box 2, and a second gas cylinder 61 is wound on the second fixing belt 62.

Specifically, the other end of the third air pipe 63 is connected with the second air storage bottle 61, a third air pump 64, a third electromagnetic valve 65 and a second filter 66 are arranged in the control box 2, and the third air pump 64, the third electromagnetic valve 65 and the second filter 66 are respectively installed on the third air pipe 63; be connected with nitrogen gas mechanism 4, air feed mechanism 5 and between control box 2 and the high temperature furnace 1 and mediate gas mechanism 6, through nitrogen gas mechanism 4 air feed mechanism 5 and the setting of mediating gas mechanism 6 conveniently utilizes the density characteristic between the gas to carry out the recovery to corresponding gas, reduces the gaseous use cost of thermal treatment, resources are saved, namely: when the nitrogen needs to be conveyed into the high temperature furnace 1 for use, the first electromagnetic valve 45, the first air pump 44 and the first filter 46 are firstly opened, the nitrogen in the first air storage bottle 41 is pumped into the high temperature furnace 1 for use, a proper amount of nitrogen is input into the high temperature furnace 1 and then is closed, the nitrogen is subjected to heat exchange treatment, the workpiece is rapidly cooled, the nitrogen purification cost is high due to the difficulty of nitrogen purification, the nitrogen needs to be recycled for reuse, the third electromagnetic valve 65, the third filter 66 and the third air pump 64 are started after the heat treatment is finished, the first electromagnetic valve 45 and the first filter 46 are started at the same time, the first air pump 44 is started to run reversely, the gas in the second air storage bottle 61 is conveyed into the high temperature furnace 1, and the carbon dioxide is higher than the nitrogen in density, the space of the high temperature furnace 1 is firstly filled with carbon dioxide from bottom to top, the first air pump 44 pumps the extruded nitrogen, the nitrogen is filtered by the first filter 46 and returns to the inside of the first air storage bottle 41 again to be stored, thereby completing the purpose of recycling the nitrogen, at the moment, the inside of the high temperature furnace 1 is filled with carbon dioxide gas, and the carbon dioxide gas is recycled again with a certain economic value and can save a certain economic expenditure, the second air pump 53 is started to convey the external air into the inside of the high temperature furnace 1 at high pressure, the high pressure air concentrates the extrusion of the carbon dioxide into the bottom space of the high temperature furnace 1 because the density of the external air is greater than that of the carbon dioxide, at the moment, the third air pump 64, the third electromagnetic valve 65 and the second filter 66 are started, thereby, the carbon dioxide can be recovered and stored in the second gas storage bottle 61, so that the gas with economic value can be recovered one by utilizing the density characteristics of different gases, the gas use cost of heat treatment is greatly reduced, and the waste of resources is avoided.

s1: when the high-temperature furnace 1 is used for heat treatment, workpieces are firstly transported into the high-temperature furnace 1 one by one for heating, and the high-temperature furnace 1 is enabled to obtain a good sealing effect through the sealing mechanism 3, so that gas leakage is avoided;

s2: then after heating is finished, the nitrogen mechanism 4 is started to convey nitrogen into the high-temperature furnace 1, and a high-temperature workpiece is rapidly cooled through the high heat exchange coefficient characteristic of the nitrogen, so that excellent mechanical properties of the workpiece are achieved, residual stress is eliminated, and metal cutting processability is improved;

s3: finally, in order to recycle high-value nitrogen, the gas mechanism 6 is started to release carbon dioxide, the nitrogen is recycled through the nitrogen mechanism 4 by utilizing the characteristic that the density of the carbon dioxide is greater than that of the nitrogen, in order to recycle the carbon dioxide with economic value, the gas supply mechanism 5 is started, and pumped air enters the high-temperature furnace 1 to compress and concentrate carbon dioxide gas, so that the carbon dioxide is recycled into the gas mechanism 6, further, the gas density characteristic is utilized to recycle one by one, the heat treatment cost is reduced, and the resource is saved.

When the sealing door 31 is required to be closed to keep the tightness of the high-temperature furnace 1, the sealing door 31 is directly pushed to be closed, the sealing door 31 contacts and pushes the contact rod 36 to deflect, the contact sleeve 35 and the contact piece 39 are made of materials with stronger adhesiveness, the contact rod 36 deflects and then drives the clamping rod 33 to move by the contact piece 39 and the contact sleeve 35, the clamping rod 33 slides outwards, the limiting rod 32 is enabled to be more conveniently contacted with the clamping rod 33 to be limited, when the limiting rod 32 is clamped on the limiting rod 32, the contact piece 39 is not contacted with the contact sleeve 35 at the moment, the spring 34 drives the clamping rod 33 to shrink in the automatic resetting process, the clamping rod 33 drives the limiting rod 32 to be close to the high-temperature furnace 1, and finally, the sealing door 31 is enabled to be attached to the high-temperature furnace 1 with better effect, so that gas leakage or heat loss in the high-temperature furnace 1 can be avoided, and the use effect of the high-temperature furnace 1 is improved; when the nitrogen needs to be conveyed to the inside of the high-temperature furnace 1 for use, the first electromagnetic valve 45, the first air pump 44 and the first filter 46 are firstly started, the nitrogen in the first air storage bottle 41 is pumped to the inside of the high-temperature furnace 1 for use, a proper amount of nitrogen is firstly input to the inside of the high-temperature furnace 1 and then is closed, the work piece subjected to heat exchange treatment is quickly cooled, the purification cost of the nitrogen is higher because of difficult nitrogen purification, the nitrogen needs to be recycled and reused, the first electromagnetic valve 65, the third filter 66 and the third air pump 64 are started after the heat treatment is finished, the first electromagnetic valve 45 and the first filter 46 are started, the first air pump 44 is started to reversely run at the same time, the air in the second air storage bottle 61 is conveyed to the inside of the high-temperature furnace 1, the carbon dioxide is firstly filled in the space of the high-temperature furnace 1 from bottom to top because the carbon dioxide is higher than the density of the nitrogen, the first air pump 44 pumps the nitrogen is filtered by the first filter 46, the nitrogen is stored in the inside of the first air storage bottle 41 again, the nitrogen is recycled, the inside of the high-temperature furnace 1 is completely filled with the carbon dioxide gas, the inside of the high-temperature furnace 1 is also has a certain economic value because the carbon dioxide is also pumped to the inside the high-pressure air in the high-temperature air storage bottle 53, the high-pressure air is more economical and the air can be recycled, and the air is more convenient to be conveyed to the outside air in the air at the bottom of the high-temperature air storage bottle 1, and the air is more economical condition has the high air quality and the air quality is more economical and high cost and can be recycled, greatly reduces the gas use cost of heat treatment and avoids the waste of resources.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The nitrogen-based atmosphere recycling device in the gas quenching process is characterized by comprising a high-temperature furnace (1), wherein a control box (2) is arranged on one side of the high-temperature furnace (1), a sealing mechanism (3) is arranged on the high-temperature furnace (1), and a nitrogen mechanism (4), a gas supply mechanism (5) and a gas medium mechanism (6) are connected between the control box (2) and the high-temperature furnace (1);

the sealing mechanism (3) comprises a sealing door (31), one end of the high-temperature furnace (1) is rotatably connected with the sealing door (31), a clamping rod (33) is connected to the high-temperature furnace (1) in a sliding manner, a spring (34) is abutted to the clamping rod (33), and a contact sleeve (35) is sleeved on the clamping rod (33);

one side of the clamping rod (33) is provided with a contact supporting rod (36), a rotating shaft (37) is fixedly connected to the contact supporting rod (36), the rotating shaft (37) is rotationally connected with the high-temperature furnace (1), a torsion spring (38) is wound on the rotating shaft (37), one end of the torsion spring (38) is clamped on the rotating shaft (37) and the other end of the torsion spring is clamped on the inner wall of the high-temperature furnace (1);

one end of the abutting rod (36) is sleeved on the clamping rod (33), a contact piece (39) is arranged in the abutting rod (36) close to the clamping rod (33), the sealing door (31) abuts against the abutting rod (36), one end of the clamping rod (33) extends to the outside of the high-temperature furnace (1), a limiting rod (32) is clamped on the clamping rod (33), and the limiting rod (32) is rotationally connected with the sealing door (31);

the nitrogen mechanism (4) comprises a first gas storage bottle (41), the first gas storage bottle (41) is arranged in the control box (2), a first fixing belt (42) is wound on the first gas storage bottle (41), two ends of the first fixing belt (42) are fixedly connected with the control box (2), and a first air pipe (43) is connected to the first gas storage bottle (41);

the first air pipe (43) penetrates through the control box (2) and extends to the inside of the high-temperature furnace (1), a first air pump (44), a first electromagnetic valve (45) and a first filter (46) are arranged in the control box (2), and the first air pump (44), the first electromagnetic valve (45) and the first filter (46) are respectively arranged on the first air pipe (43);

the air supply mechanism (5) comprises a second air pipe (52), the second air pipe (52) is arranged in the control box (2), one end of the second air pipe (52) extends to the inside of the high-temperature furnace (1), and a filter cover (51) is arranged on the side wall of the control box (2);

the other end of the second air pipe (52) extends into the filter cover (51), a second electromagnetic valve (54) and a second air pump (53) are arranged in the control box (2), and the second electromagnetic valve (54) and the second air pump (53) are arranged on the second air pipe (52);

the gas mechanism (6) comprises a third gas pipe (63), the third gas pipe (63) is arranged in the control box (2), one end of the third gas pipe (63) extends to the inside of the high-temperature furnace (1), one side of the control box (2) is fixedly connected with a second fixing belt (62), a second gas storage bottle (61) is wound on the second fixing belt (62), the other end of the third gas pipe (63) is connected with the second gas storage bottle (61), a third gas pump (64), a third electromagnetic valve (65) and a second filter (66) are arranged in the control box (2), and the third gas pump (64), the third electromagnetic valve (65) and the second filter (66) are respectively arranged on the third gas pipe (63).

2. The method of a nitrogen-based atmosphere recycling apparatus in a gas quenching process according to claim 1, comprising the steps of:

s1: when the high-temperature furnace (1) is used for heat treatment, workpieces are firstly transported into the high-temperature furnace (1) one by one for heating, and the high-temperature furnace (1) is sealed by the sealing mechanism (3) to avoid gas leakage;

s2: then after heating is finished, the nitrogen mechanism (4) is started to convey nitrogen into the high-temperature furnace (1), and a high-temperature workpiece is rapidly cooled through the high heat exchange coefficient characteristic of the nitrogen;

s3: finally, in order to recycle the nitrogen, the gas mechanism (6) is started to release the carbon dioxide, the nitrogen is recycled through the nitrogen mechanism (4) by utilizing the characteristic that the density of the carbon dioxide is larger than that of the nitrogen, in order to recycle the carbon dioxide, the gas supply mechanism (5) is started, and pumped air enters the high-temperature furnace (1) to compress and concentrate carbon dioxide gas, so that the carbon dioxide is recycled into the gas mechanism (6), and the carbon dioxide is recycled one by utilizing the characteristic of the density of the gas.