A gas quenching furnace with a small air door structure

Abstract

The present invention belongs to the technical field of heat treatment equipment, and specifically is a gas quenching furnace with a small air door structure, comprising a heating furnace body, the heating furnace body comprising an insulating jacket, a heating chamber disposed within the insulating jacket, a secondary radiator disposed on the left side of the heating chamber, a main radiator disposed on the left side of the inner wall of the insulating jacket, a closed casing disposed on the right side of the inner wall of the insulating jacket, and a drainage component disposed on the left side of the inner surface of the insulating jacket. The device provides a preset path for the circulation of gas through a cylinder consisting of an internal insulating jacket and an insulating inner cylinder, so that the gas does not need to rely on an air duct for guidance during the circulation process, and can be accurately passed into the interior of the insulating inner cylinder to perform gas quenching on the heated workpiece. The gas circulation system does not have an air duct in the original structure, making the structure simpler, thereby improving space utilization and reducing the overall weight of the device.

Description

Technical Field

[0001] The invention belongs to the technical field of heat treatment equipment, in particular to a gas quenching furnace with a small air door structure. Background Art

[0002] A vacuum gas quenching furnace is a heat treatment technology that operates under a vacuum environment. It places high demands on temperature uniformity and cooling efficiency during both the heating and cooling processes. The working principle is to heat the workpiece in the furnace's heating chamber. When the temperature reaches the set value, cooling gas is added to the furnace. An air-cooled motor circulates the gas through the furnace, removing heat and achieving a cooling effect that improves the workpiece's performance.

[0003] In existing gas quenching furnaces, the air circulation system usually uses air ducts connected to air nozzles to ensure that the air flow can be stably transported to the interior of the heating tube to achieve the air intake effect. However, too many air ducts will lead to a larger volume, which in turn makes the space utilization rate in the furnace lower. In addition, more pipes will make the internal assembly structure of the gas quenching furnace more complicated, so improvements are needed. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention solves the technical problems thereof by adopting a technical solution: a gas quenching furnace with a small air door structure, comprising a heating furnace body;

[0005] The heating furnace body includes a heat-insulating jacket, a heating chamber is provided inside the heat-insulating jacket, a secondary radiator is provided on the left side of the heating chamber, a main radiator is provided on the left side of the inner wall of the heat-insulating jacket, a closed jacket is provided on the right side of the inner wall of the heat-insulating jacket, a drainage component is provided on the left side of the inner surface of the heat-insulating jacket, a combined pump body is provided on the outside of the heat-insulating jacket, a water-cooled electrode is fixedly connected to the top of the inner cavity of the heat-insulating jacket, and a support frame is fixedly connected to the lower surface of the heat-insulating jacket;

[0006] The heating chamber includes an insulating inner cylinder, a front insulating plate and a rear insulating plate. The inner cavity of the insulating inner cylinder is provided with a connecting air nozzle through an adapter. When the drainage component is working, the gas will open the wind shield of the connecting air nozzle, so that the cold gas can enter the interior of the insulating inner cylinder to cool the workpiece. However, the gas inside the heating chamber cannot push the wind shield inside the connecting air nozzle in the opposite direction, thereby ensuring that the hot air inside the insulating inner cylinder will not directly flow back to the outside through the connecting air nozzle. The external airflow can enter the interior of the insulating inner cylinder through the connecting air nozzle and the air inlet of the right rear insulating plate. The bottom of the inner wall of the insulating inner cylinder is solid. It is fixedly connected to a processing material bracket, the inner cavity of the front insulation disk is evenly provided with one-way air outlets, the inner wall of the insulation inner cylinder is provided with a heating element assembly, and the tube body composed of the heating element assembly can heat the inside of the insulation inner cylinder, and the workpiece that needs to be gas quenched is fixed by the processing material bracket, and the gas entering the insulation inner cylinder will be discharged outward through the one-way air outlet; the drainage component includes a buckle cover, the middle part of the inner wall of the buckle cover is fixedly connected to the drainage inner frame, the upper and lower sides of the inner cavity of the buckle cover are symmetrically provided with circulation pipes, and the axis center of the inner wall of the buckle cover is provided with a combined fan.

[0007] Furthermore, the combined fan includes a sealed shaft cylinder, and the rotating motor is fixedly connected to the side of the inner wall axis of the sealed shaft cylinder close to the buckle cover, and the outer surface of the output shaft of the rotating motor is fixedly connected to the drainage fan blade. When the drainage fan blade rotates at high speed, the hot air inside the heat-insulating inner cylinder will be drawn into the drainage inner frame through the one-way air outlet, and then ejected through the oblique nozzle of the main radiator, so that the air flow circulates inside the heating furnace body, the outer surface of the drainage fan blade is fixedly connected to the exhaust sleeve, the outer surface of the rotating motor is provided with a pressure-sensing component, and the outer surface of the sealed shaft cylinder is fixedly connected to the side away from the buckle cover. A buffer push cylinder.

[0008] Furthermore, the side of the outer surface of the rotating motor away from the buffer push cylinder is fixedly connected to the axis of the inner wall of the sealing shaft cylinder, the right end of the sealing shaft cylinder is fixedly connected to the axis of the left side of the outer surface of the buckle cover, the outer surface of the exhaust sleeve is fixedly connected to the inner wall of the main radiator, and the outer surface of the main radiator is fixedly connected to the inner wall of the buckle cover. The inner cavity of the main radiator is provided with an oblique nozzle, and the right end of the circulation pipe is fixedly connected to the inner cavity of the main radiator through the oblique nozzle.

[0009] Furthermore, the combined pump body includes a suspension base frame, the top of the suspension base frame is fixedly connected to a diffusion pump, the left side of the diffusion pump cavity is fixedly connected to a Roots pump, the top of the diffusion pump cavity is fixedly connected to a flap valve, the back of the diffusion pump cavity is fixedly connected to a mechanical pump, and the front end of the flap valve is fixedly connected to the back of the cavity of the buckle cover.

[0010] Furthermore, the water-cooled electrode includes an insulating tube, a conductive connecting plate fixedly connected to the middle of the inner cavity of the insulating tube, an electrode rod fixedly connected to the middle of the inner cavity of the conductive connecting plate, the electrode rod being a hollow rod with a conductive metal rod body on the outside but a hollow tubular structure on the inside for water circulation, the inner and outer tubes being isolated from each other to avoid power outages and short circuits, the top of the electrode rod fixedly connected to a water inlet pipe, the upper portion of the inner cavity of the electrode rod fixedly connected to a water outlet pipe, the lower portion of the outer surface of the electrode rod fixedly connected to a flange, the bottom of the flange being provided with a water-cooled electrode seat. The bottom of the outer surface of the insulating tube is fixedly connected to the upper portion of the inner cavity of the thermal insulation cladding, the water inlet pipe extends to the outside of the insulating tube away from the end of the electrode rod, the water outlet pipe extends to the outside of the insulating tube away from the end of the electrode rod, the inner cavity of the flange is fixedly connected to the upper surface of the water-cooled electrode seat by screws, and the bottom end of the water-cooled electrode seat extends to the outside of the insulating tube.

[0011] Furthermore, the pressure-sensing component includes a cluster sleeve, a compression sleeve fixedly connected to the left side of the cluster sleeve's outer surface, hollow slide tubes uniformly disposed within the cluster sleeve's inner cavity, a thrust plate fixedly connected to the left side of the hollow slide tube, a spring tension plate disposed at the axis of the thrust plate's inner cavity, and an anchor plate fixedly connected to the right end of the spring tension plate. The anchor plate's outer surface is fixedly connected to the axis of the rotating motor's outer surface, the right side of the spring tension plate's outer surface is fixedly connected to the left side of the thrust plate's outer surface, and the left side of the cluster sleeve's outer surface is squeezed against the inner wall of the sealing shaft core via the compression sleeve.

[0012] The beneficial effects of the present invention are as follows:

[0013] 1. The device provides a preset path for the circulation of gas through a cylinder consisting of an internal insulating jacket and an insulating inner cylinder. This allows the gas to accurately flow into the insulating inner cylinder to quench the heated workpiece without relying on an air duct during the circulation process. The gas circulation system does not have an air duct in its original structure, making the structure simpler, thereby improving space utilization and reducing the overall weight of the device.

[0014] 2. The device's nozzle and one-way air outlet are both one-way ventilation components, ensuring that the circulating gas does not flow back and that it circulates along a pre-set path, preventing heat loss within the insulated inner cylinder during gas quenching and providing insulation. During ventilation and heat dissipation, the wind can lift the windshield inside the nozzle, quickly removing heat. This structure reduces the disadvantage of high heat loss.

[0015] 3. The improved radiator uses a main and auxiliary radiator structure. While the heat exchange area is increased, the effective heat exchange efficiency when the gas flows through is improved, which speeds up the cooling speed. Because the main radiator is located at the outlet of the cooling fan, the gas flow is better, resulting in a more uniform temperature distribution in the furnace during cooling.

[0016] 4. The improved water-cooled electrode's electrode holder is embedded in the interlayer of the cylinder. The water in the interlayer flows through the electrode holder, removing heat from the electrode holder, thereby improving the cooling effect. The water inlet pipe is inserted into the copper electrode, and the water circulates to remove heat, allowing the electrode to continue cooling. Compared with the unmodified version, the heat dissipation effect has been significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the present invention;

[0018] Figure 2 is a cross-sectional view of the present invention;

[0019] Figure 3 is a cross-sectional view of a heating chamber of the present invention;

[0020] Figure 4 is a cross-sectional view of the drainage component of the present invention;

[0021] Figure 5 is a cross-sectional view of the combined fan of the present invention;

[0022] Figure 6 It is a structural schematic diagram of the combined pump body of the present invention;

[0023] Figure 7 is a cross-sectional view of a water-cooled electrode of the present invention;

[0024] Figure 8 It is a cross-sectional view of the pressure-sensitive component of the present invention.

[0025] In the figure: 1. Heating furnace body; 11. Insulation jacket; 12. Auxiliary radiator; 13. Main radiator; 14. Enclosed jacket; 15. Oblique nozzle; 16. Support frame; 2. Combined pump body; 3. Heating chamber; 4. Water-cooled electrode; 5. Drainage component; 31. Insulation inner cylinder; 32. Front insulation plate; 33. Rear insulation plate; 34. Connecting air nozzle; 35. Processing material support; 36. One-way air outlet; 37. Heating element assembly; 51. Snap-on cover; 52. Drainage inner frame; 53. Circulation pipe; 6. Combined fan; 61. Sealed Sealing shaft core cylinder; 62. Rotating motor; 63. Drainage fan blades; 64. Exhaust sleeve; 65. Buffer push cylinder; 21. Suspension chassis; 22. Diffusion pump; 23. Roots pump; 24. Mechanical pump; 25. Flap valve; 41. Insulating cylinder; 42. Conductive connecting plate; 43. Electrode rod; 44. Water inlet pipe; 45. Water outlet pipe; 46. Flange; 47. Water-cooled electrode seat; 7. Pressure-sensitive component; 71. Cluster sliding sleeve; 72. Compression sleeve; 73. Hollow sliding tube; 74. Thrust plate; 75. Spring tension plate; 76. Anchor plate. DETAILED DESCRIPTION

[0026] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described to better illustrate the principles of the invention and its practical application, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for specific applications.

[0027] Example 1, please refer to Figure 1-Figure 5 , the present invention provides a technical solution: a gas quenching furnace with a small air door structure, comprising a heating furnace body 1;

[0028] The heating furnace body 1 includes a heat-insulating jacket 11, a heating chamber 3 is provided inside the heat-insulating jacket 11, a secondary radiator 12 is provided on the left side of the heating chamber 3, a main radiator 13 is provided on the left side of the inner wall of the heat-insulating jacket 11, a closed jacket 14 is provided on the right side of the inner wall of the heat-insulating jacket 11, a drainage component 5 is provided on the left side of the inner surface of the heat-insulating jacket 11, a combined pump body 2 is provided on the outside of the heat-insulating jacket 11, a water-cooled electrode 4 is fixedly connected to the top of the inner cavity of the heat-insulating jacket 11, and a support frame 16 is fixedly connected to the lower surface of the heat-insulating jacket 11;

[0029] The heating chamber 3 includes an insulating inner tube 31, a front insulating plate 32 and a rear insulating plate 33. The inner cavity of the insulating inner tube 31 is provided with a connecting air nozzle 34 through an adapter. When the guide component 5 is working, the gas will open the wind shield of the connecting air nozzle 34, so that the cold gas can enter the inside of the insulating inner tube 31 to cool the workpiece. However, the gas inside the heating chamber 3 cannot push the wind shield inside the connecting air nozzle 34 back, thereby ensuring that the hot air inside the insulating inner tube 31 will not directly flow back to the outside through the connecting air nozzle 34. The external airflow can enter the interior of the insulating inner tube 31 through the connecting air nozzle 34 and the air inlet of the right rear insulating plate 33. The bottom of the inner wall of the insulating inner tube 31 is solid. It is fixedly connected to a processing material bracket 35, and the inner cavity of the front insulation disk 32 is evenly provided with one-way air outlets 36. The inner wall of the insulation inner cylinder 31 is provided with a heating element assembly 37. The tube body composed of the heating element assembly 37 can heat the interior of the insulation inner cylinder 31. The workpiece that needs to be gas quenched is fixed by the processing material bracket 35, and the gas entering the insulation inner cylinder 31 will be discharged outward through the one-way air outlet 36; the drainage component 5 includes a buckled cover 51, and the middle part of the inner wall of the buckled cover 51 is fixedly connected to a drainage inner frame 52, and the upper and lower sides of the inner cavity of the buckled cover 51 are symmetrically provided with circulation pipes 53, and the axis center of the inner wall of the buckled cover 51 is provided with a combined fan 6.

[0030] The combined fan 6 includes a sealed shaft cylinder 61, and a rotating motor 62 is fixedly connected to the side of the inner wall axis of the sealed shaft cylinder 61 close to the buckled cover 51. The outer surface of the output shaft of the rotating motor 62 is fixedly connected to the drainage fan blade 63. When the drainage fan blade 63 rotates at high speed, the hot air inside the heat-insulating inner cylinder 31 will be drawn into the drainage inner frame 52 through the one-way air outlet 36, and then ejected through the oblique nozzle 15 of the main radiator 13, so that the air flow circulates inside the heating furnace body 1. The outer surface of the drainage fan blade 63 is fixedly connected to the exhaust sleeve 64, and the outer surface of the rotating motor 62 is provided with a pressure-sensing component 7. The outer surface of the sealed shaft cylinder 61 is fixedly connected to the side away from the buckled cover 51. A buffer push cylinder 65 is fixedly connected.

[0031] The side of the outer surface of the rotating motor 62, away from the buffer push cylinder 65, is fixedly connected to the axis of the inner wall of the sealing axis cylinder 61. The right end of the sealing axis cylinder 61 is fixedly connected to the axis of the left side of the outer surface of the snap-on cover 51. The outer surface of the exhaust sleeve 64 is fixedly connected to the inner wall of the main radiator 13, and the outer surface of the main radiator 13 is fixedly connected to the inner wall of the snap-on cover 51. The inner cavity of the main radiator 13 is provided with an oblique nozzle 15. The right end of the circulation pipe 53 is fixedly connected to the inner cavity of the main radiator 13 through the oblique nozzle 15. The right side of the outer surface of the drainage inner frame 52 is fixedly connected to the left side of the outer surface of the thermal insulation inner cylinder 31 through the front thermal insulation plate 32.

[0032] When the combined pump body 2 provides power, the external cold air will enter the heat-insulating jacket 11, then flow from left to right, enter the heat-insulating inner cylinder 31 through the connecting air nozzle 34 and the rear heat-insulating plate 33 on the right side, heat the environment of the internal gas-quenching workpiece through the rear heat-insulating plate 33 and the front heat-insulating plate 32, and then supplement the heat through the processing material support 35 at the bottom.

[0033] When the device is working, the rotating motor 62 will drive the drainage fan blades 63 to rotate at high speed, and then the drainage fan blades 63 will draw out the gas inside the insulation inner tube 31 through the one-way air outlet 36. The gas enters the exhaust sleeve 64 through the guidance of the drainage inner frame 52, and enters the oblique nozzle 15 of the main heater through the mesh of the exhaust sleeve 64, and then continues to flow back to the interior of the heating furnace body 1, realizing the internal circulation of the air flow inside the heating furnace body 1. After the gas quenching work is completed, when the gas passes through the auxiliary radiator 12 and the main radiator 13, it will take out the heat inside the insulation inner tube 31 for cooling work, forming a cycle, so that the heat dissipation efficiency of the air cooling system is improved.

[0034] Example 2, please refer to Figures 1-8 The present invention provides a technical solution: on the basis of embodiment one, the combined pump body 2 includes a suspension base frame 21, the top of the suspension base frame 21 is fixedly connected to a diffusion pump 22, the left side of the inner cavity of the diffusion pump 22 is fixedly connected to a Roots pump 23, the top of the inner cavity of the diffusion pump 22 is fixedly connected to a flap valve 25, the back of the inner cavity of the diffusion pump 22 is fixedly connected to a mechanical pump 24, and the front end of the flap valve 25 is fixedly connected to the back of the inner cavity of the buckle cover 51.

[0035] The water-cooled electrode 4 includes an insulating tube 41, and a conductive connecting plate 42 is fixedly connected to the middle of the inner cavity of the insulating tube 41. The middle of the inner cavity of the conductive connecting plate 42 is fixedly connected to the electrode rod 43. The electrode rod 43 is a hollow rod body with a conductive metal rod body on the outside, but a hollow tube structure on the inside, which is used for the circulation of water. The inner and outer tubes are isolated from each other to avoid power outages and short circuits. The top of the electrode rod 43 is fixedly connected to a water inlet pipe 44, the upper part of the inner cavity of the electrode rod 43 is fixedly connected to a water outlet pipe 45, and the lower part of the outer surface of the electrode rod 43 is fixedly connected to a flange 46. A water-cooled electrode seat 47 is provided at the bottom of the flange 46. The bottom of the outer surface of the insulating tube 41 is fixedly connected to the upper part of the inner cavity of the insulating shell 11, the water inlet pipe 44 extends to the outside of the insulating tube 41 from one end of the electrode rod 43, and the water outlet pipe 45 extends to the outside of the insulating tube 41 from one end of the electrode rod 43. The inner cavity of the flange 46 is fixedly connected to the upper surface of the water-cooled electrode seat 47 by screws, and the bottom end of the water-cooled electrode seat 47 extends to the outside of the insulating tube 41.

[0036] The pressure-sensing component 7 includes a cluster sleeve 71, with a compression sleeve 72 fixedly connected to the left side of its outer surface. Hollow slide tubes 73 are evenly distributed within the inner cavity of the cluster sleeve 71. A thrust plate 74 is fixedly connected to the left side of the hollow slide tube 73. A spring tension plate 75 is located at the axis of the inner cavity of the thrust plate 74. An anchor plate 76 is fixedly connected to the right end of the spring tension plate 75. The outer surface of the anchor plate 76 is fixedly connected to the axis of the outer surface of the rotating motor 62. The right side of the outer surface of the spring tension plate 75 is fixedly connected to the left side of the outer surface of the thrust plate 74. The left side of the outer surface of the cluster sleeve 71 is pressed against the inner wall of the sealing shaft cylinder 61 through the compression sleeve 72.

[0037] The water circulation inside the water-cooled electrode 4 is as follows: cold water is introduced into the inner cavity of the electrode rod 43 through the water inlet pipe 44, and the water body circulates back to the water outlet pipe 45 and is sprayed outward, thereby quickly cooling the heat-conducting electrode rod 43. The water-cooled electrode seat 47 is embedded in the heat-insulating sandwich 11, and the water flow in the sandwich passes through the water-cooled electrode seat 47 to absorb heat to achieve the cooling effect.

[0038] After the gas is guided into the interior of the exhaust sleeve 64, due to the fixed diameter of the oblique nozzle 15, when the power of the combined fan 6 is large, the gas inside the exhaust sleeve 64 is difficult to be discharged, resulting in an increase in the internal pressure. At this time, the clustering sleeve 71 will push the hollow sliding tube 73 to the left under the action of pressure, expanding the internal volume of the sealing shaft cylinder 61. At this time, the compression sleeve 72 is squeezed, and when the clustering sleeve 71 squeezes the thrust plate 74 to the left through the hollow sliding tube 73, the thrust plate 74 will push the spring tension plate 75 to the left, but the anchor plate 76 on the right side always remains in a fixed state with the rotating motor 62, so the spring at the axis of the spring tension plate 75 is stretched. At this time, the change in the internal pressure of the sealing shaft cylinder 61 is judged according to the tension applied to the spring tension plate 75, and then the circulation pipe 53 is used to timely reduce the pressure to prevent the internal pressure of the heating furnace body 1 from being too high and bursting and damaged.

[0039] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A gas quenching furnace with a small air door structure, comprising a heating furnace body (1), characterized in that: The heating furnace body (1) comprises a heat-insulating jacket (11), a heating chamber (3) is provided inside the heat-insulating jacket (11), a secondary radiator (12) is provided on the left side of the heating chamber (3), a main radiator (13) is provided on the left side of the inner wall of the heat-insulating jacket (11), a closed jacket (14) is provided on the right side of the inner wall of the heat-insulating jacket (11), a drainage component (5) is provided on the left side of the inner surface of the heat-insulating jacket (11), a combined pump body (2) is provided on the outside of the heat-insulating jacket (11), a water-cooled electrode (4) is fixedly connected to the top of the inner cavity of the heat-insulating jacket (11), and a support frame (16) is fixedly connected to the lower surface of the heat-insulating jacket (11); The heating chamber (3) comprises an insulating inner cylinder (31), a front insulating plate (32) and a rear insulating plate (33); the inner cavity of the insulating inner cylinder (31) is provided with a connecting air nozzle (34) through an adapter; the bottom of the inner wall of the insulating inner cylinder (31) is fixedly connected with a processing material bracket (35); the inner cavity of the front insulating plate (32) is evenly provided with one-way air outlets (36); and the inner wall of the insulating inner cylinder (31) is provided with a heating element assembly (37); The drainage component (5) comprises a buckled cover (51), a drainage inner frame (52) is fixedly connected to the middle of the inner cavity of the buckled cover (51), circulation pipes (53) are symmetrically arranged on the upper and lower sides of the inner cavity of the buckled cover (51), and a combined fan (6) is arranged at the axis center of the inner wall of the buckled cover (51).

2. The gas quenching furnace with a small air door structure according to claim 1, characterized in that: The combined fan (6) comprises a sealing axis core cylinder (61), a rotating motor (62) is fixedly connected to the side of the inner wall axis of the sealing axis core cylinder (61) close to the buckle cover (51), the outer surface of the output shaft of the rotating motor (62) is fixedly connected to the drainage fan blade (63), the outer surface of the drainage fan blade (63) is fixedly connected to the exhaust sleeve (64), the outer surface of the rotating motor (62) is provided with a pressure-sensitive component (7), and the outer surface of the sealing axis core cylinder (61) is fixedly connected to the side away from the buckle cover (51) with a buffer push cylinder (65).

3. The gas quenching furnace with a small air door structure according to claim 2, characterized in that: The side of the outer surface of the rotating motor (62) away from the buffer push cylinder (65) is fixedly connected to the axis center of the inner wall of the sealing axis cylinder (61), the right end of the sealing axis cylinder (61) is fixedly connected to the axis center of the left side of the outer surface of the buckle cover (51), the outer surface of the exhaust sleeve (64) is fixedly connected to the inner wall of the main radiator (13), and the outer surface of the main radiator (13) is fixedly connected to the inner wall of the buckle cover (51).

4. The gas quenching furnace with a small air door structure according to claim 3, characterized in that: The inner cavity of the main radiator (13) is provided with an oblique nozzle (15), and the right end of the circulation pipe (53) is fixedly connected to the inner cavity of the main radiator (13) through the oblique nozzle (15).

5. The gas quenching furnace with a small air door structure according to claim 1, characterized in that: The combined pump body (2) comprises a suspension base (21), the top of the suspension base (21) is fixedly connected to a diffusion pump (22), the left side of the inner cavity of the diffusion pump (22) is fixedly connected to a Roots pump (23), the top of the inner cavity of the diffusion pump (22) is fixedly connected to a flap valve (25), the back of the inner cavity of the diffusion pump (22) is fixedly connected to a mechanical pump (24), and the front end of the flap valve (25) is fixedly connected to the back of the inner cavity of the buckle cover (51).

6. The gas quenching furnace with a small air door structure according to claim 1, characterized in that: The water-cooled electrode (4) comprises an insulating tube (41), a conductive connecting plate (42) is fixedly connected to the middle of the inner cavity of the insulating tube (41), an electrode rod (43) is fixedly connected to the middle of the inner cavity of the conductive connecting plate (42), a water inlet pipe (44) is fixedly connected to the top of the electrode rod (43), a water outlet pipe (45) is fixedly connected to the upper part of the inner cavity of the electrode rod (43), a flange (46) is fixedly connected to the lower part of the outer surface of the electrode rod (43), and a water-cooled electrode seat (47) is provided at the bottom of the flange (46).

7. The gas quenching furnace with a small air door structure according to claim 6, characterized in that: The bottom of the outer surface of the insulating tube (41) is fixedly connected to the upper part of the inner cavity of the heat-insulating jacket (11); the end of the water inlet pipe (44) away from the electrode rod (43) extends to the outside of the insulating tube (41); the end of the water outlet pipe (45) away from the electrode rod (43) extends to the outside of the insulating tube (41); the inner cavity of the flange (46) is fixedly connected to the upper surface of the water-cooled electrode seat (47) by screws; and the bottom end of the water-cooled electrode seat (47) extends to the outside of the insulating tube (41).

8. The gas quenching furnace with a small air door structure according to claim 2, characterized in that: The pressure-sensing component (7) includes a cluster sleeve (71), a compression sleeve (72) is fixedly connected to the left side of the outer surface of the cluster sleeve (71), the inner cavity of the cluster sleeve (71) is evenly provided with hollow slide tubes (73), the left side of the hollow slide tube (73) is fixedly connected to a thrust plate (74), a spring tension plate (75) is provided at the axis center of the inner cavity of the thrust plate (74), and the right end of the spring tension plate (75) is fixedly connected to an anchor plate (76).

9. The gas quenching furnace with a small air door structure according to claim 8, characterized in that: The outer surface of the anchor plate (76) is fixedly connected to the axis center of the outer surface of the rotating motor (62), the right side of the outer surface of the spring tension plate (75) is fixedly connected to the left side of the outer surface of the thrust plate (74), and the left side of the outer surface of the cluster sleeve (71) is squeezed against the inner wall of the sealing shaft core cylinder (61) through the compression sleeve (72).

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