Nitrogen quenching furnace tank cooling system

Abstract

The invention relates to the technical field of quenching, and mainly relates to a nitrogen quenching furnace tank cooling system which comprises a quenching furnace, a furnace cover covers the quenching furnace, the nitrogen quenching furnace tank cooling system further comprises a butt joint cylinder, a plurality of connecting frames are fixedly communicated with the interior of the butt joint cylinder, a plurality of placing discs used for placing workpieces are fixed to the connecting frames, the connecting frames are of hollow structures, and the butt joint cylinder is provided with a plurality of clamping grooves. A plurality of through holes for exhausting are formed in the outer sides of the connecting frames, and hanging brackets are fixed to the tops of the two connecting frames; the connecting frame is fixed to the bottom of the quenching furnace, the gas supply pipe is fixed to the bottom of the quenching furnace, the tail end of the gas supply pipe is fixedly communicated with a hose, and the gas supply pipe is in butt joint with nitrogen supply equipment through the hose. After the butt joint cylinder at the bottom abuts against the sealing unit in the air supply pipe, air supply cooling is carried out, air is directly blown to a workpiece through the through hole in the connecting frame, and the targeted rapid cooling effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of quenching, in particular to a nitrogen quenching furnace tank cooling system. Background Art

[0002] Quenching is a heat treatment process that aims to change the microstructure and properties of metal materials through rapid cooling, which can increase the hardness of metal materials;

[0003] The common quenching method currently available is salt bath quenching. After the workpiece is heated to 1020 degrees in the TD furnace through the carburization layer treatment, it is hung in the salt bath quenching furnace for rapid cooling, which plays a quenching and cooling role. However, salt bath quenching pollutes the ambient air and corrodes the workpiece after quenching, especially the salt stuck in the grooves and blind holes is difficult to remove. Summary of the invention

[0004] The object of the present invention is to provide a nitrogen quenching furnace tank cooling system to solve the problems mentioned in the above background technology that salt bath quenching is prone to corrosion and salt stuck in grooves and blind holes is difficult to remove.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a nitrogen quenching furnace tank cooling system, comprising a quenching furnace, a furnace cover on the top of the quenching furnace, and a docking tube, a plurality of connecting frames are fixedly connected in the docking tube, and a plurality of placing plates for placing workpieces are fixed on the plurality of connecting frames, and a plurality of the connecting frames are hollow structures, and a plurality of through holes for exhaust are opened on the outer sides thereof, and hangers are fixed on the tops of two of the connecting frames; and an air supply pipe fixed at the bottom of the quenching furnace, a hose is fixedly connected to the tail end of the air supply pipe, and the hose is connected to the nitrogen supply equipment; and a sealing unit installed in the air supply pipe, through which the butt joint tube and the air supply pipe are squeezed to achieve ventilation after contact.

[0006] Preferably, the sealing unit includes an abutting ring fixed on the inner wall of the air supply pipe, a bracket is fixed in the air supply pipe, and a sliding rod is slidably inserted in the bracket, a sealing ball that fits the abutting ring is fixed on the top of the sliding rod, and an adjusting rod is fixed on the top of the sealing ball, and an extrusion spring that abuts against the sealing ball and the bracket is sleeved on the outer side of the sliding rod.

[0007] Preferably, an abutment block matched with the adjustment rod is fixed in the docking sleeve, and a chamfer is provided on the inner side of the bottom of the docking sleeve.

[0008] Preferably, a rubber ring is fixed to the outer side of the top of the air supply pipe, and a sealing ring matched with the rubber ring is fixed to the inner wall of the docking tube, and a chamfer is provided at one end of the sealing ring close to the rubber ring.

[0009] Preferably, the vertical end of the connecting frame is composed of a plurality of thick tubes and a plurality of thin tubes interconnected with each other, and a plurality of through holes are provided on the thin tubes, an adjusting tube is slidably sleeved on the thin tube, a plurality of exhaust holes are provided on the outside of the adjusting tube, and the outer wall of the adjusting tube is made of frosted material, and a driving component for driving the plurality of connecting frames to rotate is installed in the quenching furnace.

[0010] Preferably, the driving component comprises a driving motor fixed to the bottom of the quenching furnace, a driving gear is fixed to the output end of the driving motor, and a transmission gear meshing with the driving gear is fixed to the bottom of the docking sleeve.

[0011] Preferably, adjacent sides of the transmission gear and the driving gear are both chamfered.

[0012] Preferably, the top of the quenching furnace is provided with a chamfer to facilitate the hanging of the connecting frame, and an exhaust passage is provided in the quenching furnace, one end of the exhaust passage is connected to the interior of the quenching furnace, and an exhaust pipe is fixed to the other end.

[0013] Preferably, a limiting ring abutting against the bottom of the docking tube is fixed to the outer side of the air supply pipe.

[0014] Preferably, the outer walls of the adjusting tubes on the plurality of connecting frames are in contact with the inner wall of the quenching furnace.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The connecting frame designed in the present invention cooperates with the placing plate to place the workpieces, and then uses the lifting equipment to put them into the quenching furnace together. After the docking tube at the bottom is against the sealing unit in the air supply pipe, air supply cooling is carried out. The gas is directly blown to the workpiece through the through holes on the connecting frame, which has a targeted rapid cooling effect. Compared with traditional salt bath quenching, it can avoid corrosion to the workpiece and avoid the situation where salt sticks to the grooves and blind holes and is difficult to remove.

[0017] 2. The driving device designed in the present invention drives the connecting frame to rotate, so that the regulating tube rotates along the inner wall of the quenching furnace, thereby achieving swing blowing of nitrogen to each layer of workpieces, making the cooling range wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a structural schematic diagram of a quenching furnace of the present invention after partial section;

[0020] Figure 3 It is a partial cutaway rear side view of the quenching furnace of the present invention;

[0021] Figure 4 It is a schematic diagram of the docking of the driving component and the docking tube of the present invention;

[0022] Figure 5 It is a partial sectional front view of the docking tube and the air supply pipe of the present invention;

[0023] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0024] Figure 7 It is a schematic diagram of the connection frame and the display plate of the present invention.

[0025] In the figure: 1. quenching furnace; 2. furnace cover; 3. docking tube; 4. connecting frame; 5. placement plate; 6. through hole; 7. hanger; 8. air supply pipe; 9. sealing unit; 10. counter-ring; 11. bracket; 12. slide rod; 13. sealing ball; 14. adjusting rod; 15. extrusion spring; 16. counter-block; 17. rubber ring; 18. sealing ring; 19. thick tube; 20. thin tube; 21. adjusting tube; 22. exhaust hole; 23. driving component; 24. driving motor; 25. driving gear; 26. transmission gear; 27. exhaust channel; 28. exhaust pipe; 29. ​​limiting ring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0027] Example 1: Please refer to Figure 1 - Figure 3 as well as Figure 7 A nitrogen quenching furnace tank cooling system shown in the figure includes a quenching furnace 1, a furnace cover 2 is covered on the top of the quenching furnace 1, and a docking tube 3, a plurality of connecting frames 4 are fixedly connected in the docking tube 3, a plurality of placing plates 5 for placing workpieces are fixed on the plurality of connecting frames 4, and the plurality of connecting frames 4 are hollow structures, and a plurality of through holes 6 for exhaust are opened on the outer side thereof, wherein hangers 7 are fixed on the tops of two connecting frames 4; and an air supply pipe 8 fixed at the bottom of the quenching furnace 1, a hose is fixedly connected to the tail end of the air supply pipe 8, and the hose is connected to the nitrogen supply equipment; and a sealing unit 9 installed in the air supply pipe 8, through which the butt joint tube 3 and the air supply pipe 8 are squeezed to realize ventilation after contact;

[0028] In this solution, a lifting device is used to lift the workpiece placed on the placement plate 5 and put it into the quenching furnace 1, and then the furnace cover 2 is covered. After the docking tube 3 and the air supply pipe 8 are butted against each other, the sealing unit 9 is opened, and the air supply pipe 8 is filled with cooling nitrogen through the nitrogen supply device. The nitrogen is discharged through the through hole 6 on the connecting frame 4, thereby directly acting on the outside of the workpiece on the placement plate 5, achieving a targeted gas cooling effect.

[0029] It should also be noted that the connecting frame 4 is made of a heat-non-conductive and high-temperature resistant material, which may be, but is not limited to, a ceramic tube or a carbon tube.

[0030] For further information, see Figure 5 as well as Figure 6 The sealing unit 9 includes an abutting ring 10 fixed on the inner wall of the air supply pipe 8, a bracket 11 is fixed in the air supply pipe 8, a slide rod 12 is slidably inserted in the bracket 11, a sealing ball 13 that fits the abutting ring 10 is fixed on the top of the slide rod 12, an adjusting rod 14 is fixed on the top of the sealing ball 13, and an extrusion spring 15 that abuts against the sealing ball 13 and the bracket 11 is sleeved on the outer side of the slide rod 12;

[0031] Among them, a counter block 16 adapted to the adjustment rod 14 is fixed in the docking tube 3. At the same time, in order to facilitate the docking of the docking tube 3 and the air supply pipe 8, a chamfer is provided on the inner side of the bottom of the docking tube 3;

[0032] After the docking sleeve 3 and the air supply pipe 8 are sleeved and abutted against each other, the abutting block 16 will squeeze the adjusting rod 14, causing the sealing ball 13 to move downward, and the sealing ball 13 will be separated from the abutting ring 10. At this time, nitrogen is filled into the air supply pipe 8 again, and the nitrogen is directly transmitted to the multiple connecting frames 4 through the docking sleeve 3, and is discharged through the through hole 6, directly acting on the outer side of the workpiece on the placement plate 5, thereby achieving targeted cooling treatment.

[0033] For further information, see Figure 4 and Figure 7 The vertical end of the connecting frame 4 is composed of a plurality of thick tubes 19 and a plurality of thin tubes 20 connected to each other, a plurality of through holes 6 are provided on the thin tubes 20, an adjusting tube 21 is slidably sleeved on the thin tubes 20, a plurality of exhaust holes 22 are provided on the outer side of the adjusting tube 21, and the outer wall of the adjusting tube 21 is made of frosted material. A driving component 23 for driving the plurality of connecting frames 4 to rotate is installed in the quenching furnace 1;

[0034] The driving component 23 includes a driving motor 24 fixed to the bottom of the quenching furnace 1 , a driving gear 25 is fixed to the output end of the driving motor 24 , and a transmission gear 26 meshing with the driving gear 25 is fixed to the bottom of the docking sleeve 3 .

[0035] The driving component 23 drives the multiple connecting frames 4 to rotate: the driving motor 24 drives the driving gear 25 to rotate. After the docking tube 3 is inserted into the air supply pipe 8, under the action of gravity, the transmission gear 26 on the outside of the docking tube 3 will engage with the driving gear 25, so that when the driving gear 25 rotates, the docking tube 3 will follow the rotation, causing the multiple connecting frames 4 to rotate.

[0036] It should be noted that, in order to facilitate the transmission gear 26 and the driving gear 25 to be more easily connected and meshed, chamfers are provided on adjacent sides of the transmission gear 26 and the driving gear 25 .

[0037] In this solution, the outer walls of the adjusting tubes 21 on several connecting frames 4 are in contact with the inner wall of the quenching furnace 1. When the connecting frame 4 rotates in the quenching furnace 1, the adjusting tubes 21 on the outside of the connecting frame 4 will rotate along the inner wall of the quenching furnace 1, so that the exhaust holes 22 on the outside of the adjusting tubes 21 can blow air at multiple angles, thereby achieving a better cooling effect on the periphery of the workpiece.

[0038] For further information, see Figure 2 as well as Figure 3 A chamfer is provided on the top of the quenching furnace 1 to facilitate the hanging of the connecting frame 4. An exhaust channel 27 is provided in the quenching furnace 1. One end of the exhaust channel 27 is connected to the inside of the quenching furnace 1, and an exhaust pipe 28 is fixed to the other end. The gas in the quenching furnace 1 is discharged outward through the exhaust channel 27 and the exhaust pipe 28.

[0039] Example 2: Please refer to Figure 5 This embodiment further explains the first embodiment, and the difference lies in that the air supply pipe 8 and the docking tube 3 are correspondingly optimized and improved, so that the docking seal is better and more stable.

[0040] Specifically, a rubber ring 17 is fixed to the outer side of the top of the air supply pipe 8 , and a sealing ring 18 matched with the rubber ring 17 is fixed to the inner wall of the docking tube 3 . The sealing ring 18 has a chamfered corner at one end close to the rubber ring 17 .

[0041] In this solution, after the docking tube 3 and the air supply pipe 8 are plugged in, the designed rubber ring 17 and the sealing ring 18 will contact and abut against each other, playing a sealing role at the bottom of the docking tube 3, so that nitrogen can only be transmitted through multiple connecting frames 4.

[0042] It should also be noted that, in order to make the connection between the docking tube 3 and the air supply pipe 8 more stable, a limiting ring 29 is fixed on the outer side of the air supply pipe 8 to abut against the bottom of the docking tube 3 .

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nitrogen quenching furnace tank cooling system, comprising: A quenching furnace (1), wherein the quenching furnace (1) is covered with a furnace cover (2); It is characterized by further comprising: A docking tube (3), wherein a plurality of connecting frames (4) are fixedly connected inside the docking tube (3), and a plurality of placing plates (5) for placing workpieces are fixed on the plurality of connecting frames (4), and the plurality of connecting frames (4) are hollow structures, and a plurality of through holes (6) for exhaust are opened on the outer sides thereof, wherein a hanger (7) is fixed on the top of two of the connecting frames (4); and, A gas supply pipe (8) is fixed at the bottom of the quenching furnace (1), the tail end of the gas supply pipe (8) is fixedly connected to a hose and connected to the nitrogen supply equipment through the hose; and A sealing unit (9) is installed in the air supply pipe (8), and through the sealing unit (9), the butt joint sleeve (3) and the air supply pipe (8) are contacted and squeezed to achieve ventilation.

2. A nitrogen quenching furnace tank cooling system according to claim 1, characterized in that: The sealing unit (9) comprises an abutting ring (10) fixed on the inner wall of the air supply pipe (8), a bracket (11) is fixed in the air supply pipe (8), and a slide rod (12) is slidably inserted in the bracket (11), a sealing ball (13) that fits the abutting ring (10) is fixed on the top of the slide rod (12), and an adjusting rod (14) is fixed on the top of the sealing ball (13), and an extrusion spring (15) that abuts against the sealing ball (13) and the bracket (11) is sleeved on the outer side of the slide rod (12).

3. A nitrogen quenching furnace tank cooling system according to claim 2, characterized in that: An abutting block (16) matched with the adjusting rod (14) is fixed inside the docking tube (3), and a chamfer is provided on the inner side of the bottom of the docking tube (3).

4. A nitrogen quenching furnace tank cooling system according to claim 1, characterized in that: A rubber ring (17) is fixed to the outer side of the top of the air supply pipe (8), and a sealing ring (18) matched with the rubber ring (17) is fixed to the inner wall of the docking tube (3), and a chamfer is formed at one end of the sealing ring (18) close to the rubber ring (17).

5. The nitrogen quenching furnace tank cooling system according to claim 1, characterized in that: The vertical end of the connecting frame (4) is composed of a plurality of thick tubes (19) and a plurality of thin tubes (20) which are interconnected, and a plurality of through holes (6) are provided on the thin tubes (20). An adjusting tube (21) is slidably sleeved on the thin tubes (20), and a plurality of exhaust holes (22) are provided on the outer side of the adjusting tube (21). The outer wall of the adjusting tube (21) is made of frosted material. A driving component (23) for driving the plurality of connecting frames (4) to rotate is installed in the quenching furnace (1).

6. A nitrogen quenching furnace tank cooling system according to claim 5, characterized in that: The driving component (23) comprises a driving motor (24) fixed to the bottom of the quenching furnace (1), a driving gear (25) being fixed to the output end of the driving motor (24), and a transmission gear (26) meshing with the driving gear (25) being fixed to the bottom of the docking sleeve (3).

7. A nitrogen quenching furnace tank cooling system according to claim 6, characterized in that: Adjacent sides of the transmission gear (26) and the driving gear (25) are both chamfered.

8. A nitrogen quenching furnace tank cooling system according to claim 1, characterized in that: The top of the quenching furnace (1) is provided with a chamfer for facilitating the hanging of the connecting frame (4), and an exhaust passage (27) is provided inside the quenching furnace (1), one end of the exhaust passage (27) is connected to the inside of the quenching furnace (1), and an exhaust pipe (28) is fixed to the other end.

9. A nitrogen quenching furnace tank cooling system according to claim 1, characterized in that: A limiting ring (29) is fixed on the outer side of the air supply pipe (8) and abuts against the bottom of the docking tube (3).

10. A nitrogen quenching furnace tank cooling system according to claim 5, characterized in that: The outer walls of the regulating tubes (21) on the plurality of connecting frames (4) are in contact with the inner wall of the quenching furnace (1).

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