Dental plate surface nitriding treatment device and method thereof

Abstract

The invention discloses a tooth plate surface nitriding treatment device and method, and relates to the technical field of tooth plate treatment.The tooth plate surface nitriding treatment device comprises a nitriding treatment box body, multiple sets of placing transverse plates are evenly installed in an inner cavity of the nitriding treatment box body, and multiple sets of through holes are evenly formed in the multiple sets of placing transverse plates; heating assemblies are installed on the top wall of an inner cavity of the nitriding treatment box and the bottom walls of the multiple sets of placement transverse plates, a gas inlet assembly is installed at the bottom end of the outer wall of one side of the nitriding treatment box, a waste gas treatment box is installed on the outer wall of the other side of the nitriding treatment box, and a partition plate is installed in the middle of an inner cavity of the waste gas treatment box; a second ventilation pipe extending to the inner cavity of the waste gas treatment box body is mounted at the upper end of the outer wall of the other side of the nitriding treatment box body. When the waste gas treatment device is used, used ammonia gas, nitrogen gas and nitrogen dioxide gas can be fully mixed with a dilute sulfuric acid solution and a saturated sodium hydroxide solution through the second gas exchange pipe and the first gas exchange pipe, so that the ammonia gas and the nitrogen dioxide gas can be automatically removed, and the waste gas treatment effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of dental plate treatment, and in particular to a dental plate surface nitriding treatment device and method. Background Art

[0002] In the field of machinery, the tooth plate usually refers to two square templates used in the thread rolling machine, which are generally made of DC53 material or SKH-9 high-speed steel and are mainly used to extrude the screw nails to form threads. Nitriding treatment refers to placing the tooth plate workpiece in a nitriding furnace, and through a series of chemical reactions, a nitride layer is formed on the surface of the tooth plate workpiece, thereby improving the hardness, wear resistance and fatigue resistance of the tooth plate workpiece surface.

[0003] The Chinese utility model patent document with announcement number: CN203419977U discloses a carbonitriding device, including an antechamber and a heating chamber that are interconnected, the antechamber and the heating chamber are connected to a vacuum system, the workpiece is transferred between the antechamber and the heating chamber by a workpiece transfer device, a heating system is arranged in the heating chamber, an intermediate door is arranged between the antechamber and the heating chamber, the antechamber is provided with a feeding port for simultaneously feeding in and out materials, a front door is arranged outside the feeding port, an oil tank for quenching is arranged below the antechamber, the front door is provided with a burner for preventing oxygen from entering the antechamber, and the heating chamber is provided with air vents for introducing acetylene gas as a carburizing gas source and ammonia gas as a nitriding gas source.

[0004] When the above carbonitriding device is in use, it is unable to fully and effectively treat the waste gas, so that the waste gas causes air pollution after being discharged. Summary of the invention

[0005] In order to improve the above-mentioned problem of being unable to fully and effectively treat the exhaust gas, the present invention provides a tooth plate surface nitriding treatment device and method.

[0006] The present invention provides a tooth plate surface nitriding treatment device and method, which adopts the following technical solutions:

[0007] A tooth plate surface nitriding treatment device comprises a nitriding treatment box, the inner cavity of the nitriding treatment box is evenly installed with multiple groups of horizontal plates, the inner parts of the multiple groups of horizontal plates are evenly provided with multiple groups of through holes, the inner cavity top wall of the nitriding treatment box and the bottom wall of the multiple groups of horizontal plates are both installed with heating components, the bottom end of the outer wall of one side of the nitriding treatment box is installed with an air intake component, the outer wall of the other side of the nitriding treatment box is installed with an exhaust gas treatment box, a partition is installed at the middle position of the inner cavity of the exhaust gas treatment box, the upper end of the outer wall of the other side of the nitriding treatment box is installed with a second ventilation pipe extending to the inner cavity of the exhaust gas treatment box, the upper end of the outer wall of the partition is installed with a first ventilation pipe extending to the inner cavity of the exhaust gas treatment box, the bottom ends of the outer walls of the second ventilation pipe and the first ventilation pipe are evenly provided with multiple groups of aeration holes, the inner cavity of the exhaust gas treatment box is respectively filled with dilute sulfuric acid solution and saturated sodium hydroxide solution on both sides, and the upper end of the outer wall of the exhaust gas treatment box away from the nitriding treatment box is installed with an exhaust pipe.

[0008] Optionally, the air intake assembly includes a first air intake pipe, a second air intake pipe and a third air intake pipe, and the first air intake pipe, the second air intake pipe and the third air intake pipe are all installed at the lower end of the outer wall of the nitriding treatment box, the first air intake pipe is interconnected with the ammonia storage device of the prior art, the second air intake pipe is interconnected with the nitrogen storage device of the prior art, and the third air intake pipe is interconnected with the nitrogen dioxide gas storage device of the prior art.

[0009] Optionally, the heating assembly includes a protective mesh frame, and the protective mesh frames are provided in multiple groups. The multiple groups of protective mesh frames are respectively installed on the top wall of the inner cavity of the nitriding treatment box and the bottom wall of multiple groups of cross plates. Electric heating tubes are installed at the lower ends of the inner cavities of the multiple groups of protective mesh frames.

[0010] Optionally, both ends of the top wall of the exhaust gas treatment box are equipped with liquid inlet pipes, and both ends of the bottom wall of the exhaust gas treatment box are equipped with liquid discharge pipes.

[0011] Optionally, pH meters extending into the inner cavity of the exhaust gas treatment box are installed at both ends of the bottom wall of the exhaust gas treatment box.

[0012] Optionally, positioning plates are provided on both sides of the top walls where the multiple groups of horizontal plates are placed, multiple groups of springs are evenly installed on the outer walls on the sides where the multiple groups of positioning plates are close to each other, clamping plates are installed at the ends of the multiple groups of springs, and multiple groups of clamping rods that engage with the through holes are installed on the bottom walls of the positioning plates.

[0013] Optionally, a mounting frame is installed at the bottom wall of the nitriding treatment box, a water chiller is installed at the bottom wall of the inner cavity of the mounting frame, and a serpentine pipe extending to the bottom end of the inner cavity of the nitriding treatment box is installed on the water chiller.

[0014] Optionally, both ends of the front side walls of the nitriding treatment box are hinged with a switch door body through hinges.

[0015] Optionally, liquid level windows are installed at both ends of the front side walls of the exhaust gas treatment box.

[0016] A method for nitriding the surface of a tooth plate, comprising the following steps:

[0017] S1: Use the mounting frame to stably place the tooth plate surface nitriding treatment device at an appropriate position, then open the switch door and place the tooth plate to be treated on the placement horizontal plate at an appropriate position, then place the clamping plate, spring and positioning plate at an appropriate position on the top wall of the placement horizontal plate, move the clamping plate to move toward one side of the positioning plate and cause the spring to contract to produce elastic deformation, while allowing the clamping rod to engage with the through hole at the corresponding position, loosen the clamping plate, and automatically push the clamping plate to move horizontally on the top wall of the placement horizontal plate under the elastic force of the spring, so that tooth plates of different specifications can be tightly clamped and fixed;

[0018] S2: Open the control valve on the liquid inlet pipe, and inject appropriate amounts of dilute sulfuric acid solution and saturated sodium hydroxide solution into the inner cavity of the exhaust gas treatment box through the two groups of liquid inlet pipes, and separate the two groups of solutions from each other under the action of the partition;

[0019] S3: closing the switch door, opening the control valves on the first air inlet pipe, the second air inlet pipe and the third air inlet pipe, so that ammonia, nitrogen and nitrogen dioxide can enter the inner cavity of the nitriding treatment box through the first air inlet pipe, the second air inlet pipe and the third air inlet pipe respectively, and under the action of the multiple groups of through holes, ammonia, nitrogen and nitrogen dioxide can participate in the nitriding treatment process of the tooth plate;

[0020] S4: When performing step S3, multiple switch doors are energized to generate heat through external switches, thereby heating the air in the inner cavity of the nitriding treatment box, and ensuring the thoroughness of the nitriding of the surface of the tooth plate through temperature control;

[0021] S5: After steps S1-S4, the used ammonia, nitrogen and nitrogen dioxide gases can enter different positions in the inner cavity of the exhaust gas treatment box through the second ventilation pipe and the first ventilation pipe in sequence, and the ammonia gas can be fully mixed with the dilute sulfuric acid liquid under the action of multiple groups of aeration holes, and the nitrogen dioxide gas can be fully mixed with the saturated sodium hydroxide solution, so that the ammonia gas and nitrogen dioxide gas can be automatically removed, and the remaining nitrogen and other gases can be discharged under the action of the exhaust pipe;

[0022] S6: When performing step S2, the liquid level window allows the staff to check the liquid level heights of the dilute sulfuric acid solution and the saturated sodium hydroxide solution in the inner cavity of the exhaust gas treatment box in real time to ensure the removal effect of ammonia and nitrogen dioxide gas;

[0023] S7: After step S5, the pH of the remaining dilute sulfuric acid solution and saturated sodium hydroxide solution in the waste gas treatment box is automatically measured by a pH meter to ensure the removal effect of ammonia and nitrogen dioxide gas;

[0024] S8: After steps S5-S7, open the control valve on the drain pipe to discharge the used dilute sulfuric acid solution and sodium hydroxide solution, so as to facilitate their replacement;

[0025] S9: After steps S1-S8, the water chiller is started to automatically circulate the cold water through the serpentine pipe, and the cold water is automatically cooled during the flow, so that the cold water can exchange heat with the hot air in the inner cavity of the nitriding treatment box during the flow at the bottom of the inner cavity of the nitriding treatment box, thereby improving the cooling efficiency of the air in the inner cavity of the nitriding treatment box and shortening the cooling time of the tooth plate;

[0026] S10: After step S9, the switch door is opened again and the tooth plate in the inner cavity of the nitriding treatment box is taken out.

[0027] In summary, the present invention includes at least one of the following beneficial effects:

[0028] The used ammonia, nitrogen and nitrogen dioxide gases can be fully mixed with the dilute sulfuric acid solution and the saturated sodium hydroxide solution through the second ventilation pipe and the first ventilation pipe, so that the ammonia and nitrogen dioxide gases can be automatically removed, thereby improving the treatment effect of the exhaust gas;

[0029] Start the chiller to automatically circulate cold water through the serpentine pipe, so that the cold water can exchange heat with the hot air in the inner cavity of the nitriding treatment box during the flow at the bottom of the inner cavity of the nitriding treatment box, thereby improving the cooling efficiency of the air in the inner cavity of the nitriding treatment box and shortening the cooling time of the tooth plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a front view cross-sectional structural schematic diagram of the present invention;

[0031] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0032] Figure 3 This is a schematic diagram of the top view of the structure of placing the horizontal plate, spring, clamping plate and positioning plate of the present invention;

[0033] Figure 4 It is a front view structural schematic diagram of the present invention.

[0034] In the figure: 1. Protective net frame; 2. Placement horizontal plate; 3. First air inlet pipe; 4. Second air inlet pipe; 5. Third air inlet pipe; 6. Serpentine pipe; 7. Chiller; 8. Mounting frame; 9. pH meter; 10. Drain pipe; 11. Partition; 12. Aeration hole; 13. Waste gas treatment box; 14. Exhaust pipe; 15. First ventilation pipe; 16. Liquid inlet pipe; 17. Second ventilation pipe; 18. Through hole; 19. Nitriding treatment box; 20. Electric heating pipe; 21. Switch door; 22. Liquid level window; 23. Spring; 24. Clamping plate; 25. Positioning plate. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-4 The present invention is described in further detail.

[0036] 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.

[0037] An embodiment of the present invention is as follows: Figure 1 A tooth plate surface nitriding treatment device includes a nitriding treatment box 19, the inner cavity of the nitriding treatment box 19 is evenly installed with multiple groups of horizontal plates 2, and multiple groups of through holes 18 are evenly opened inside the multiple groups of horizontal plates 2. The top wall of the inner cavity of the nitriding treatment box 19 and the bottom wall of the multiple groups of horizontal plates 2 are both installed with heating components. The heating components include a protective mesh frame 1. The protective mesh frame 1 is provided with multiple groups. The multiple groups of protective mesh frames 1 are respectively installed on the top wall of the inner cavity of the nitriding treatment box 19 and the bottom wall of the multiple groups of horizontal plates 2. The lower ends of the inner cavities of the multiple groups of protective mesh frames 1 are all installed with electric heating tubes 20.

[0038] Please refer to the attached figure in the instruction manual Figure 1 A tooth plate surface nitriding treatment device includes: an air intake assembly is installed at the bottom end of the outer wall of one side of a nitriding treatment box 19, and the air intake assembly includes a first air intake pipe 3, a second air intake pipe 4 and a third air intake pipe 5. The first air intake pipe 3, the second air intake pipe 4 and the third air intake pipe 5 are all installed at the lower end of the outer wall of the nitriding treatment box 19, the first air intake pipe 3 is interconnected with an ammonia storage device in the prior art, the second air intake pipe 4 is interconnected with a nitrogen storage device in the prior art, and the third air intake pipe 5 is interconnected with a nitrogen dioxide gas storage device in the prior art. Control valves are installed on the outside of the first air intake pipe 3, the second air intake pipe 4 and the third air intake pipe 5.

[0039] Please refer to the attached figure in the instruction manual Figure 1A tooth plate surface nitriding treatment device comprises: an exhaust gas treatment box 13 is installed on the outer wall of the other side of the nitriding treatment box 19, a partition 11 is installed at the middle position of the inner cavity of the exhaust gas treatment box 13, a second ventilation pipe 17 extending to the inner cavity of the exhaust gas treatment box 13 is installed on the upper end of the outer wall of the other side of the nitriding treatment box 19, a first ventilation pipe 15 extending to the inner cavity of the exhaust gas treatment box 13 is installed on the upper end of the outer wall of the partition 11, the longitudinal sections of the second ventilation pipe 17 and the first ventilation pipe 15 are both set to L shape, and multiple groups of aeration holes 12 are evenly opened at the bottom ends of the outer walls of the second ventilation pipe 17 and the first ventilation pipe 15, the two sides of the inner cavity of the exhaust gas treatment box 13 are respectively filled with dilute sulfuric acid solution and saturated sodium hydroxide solution, and an exhaust pipe 14 is installed on the upper end of the outer wall of the exhaust gas treatment box 13 away from the nitriding treatment box 19.

[0040] Please refer to the attached figure in the instruction manual Figure 1 A tooth plate surface nitriding treatment device includes: liquid inlet pipes 16 are installed at both ends of the top wall of the exhaust gas treatment box 13, liquid discharge pipes 10 are installed at both ends of the bottom wall of the exhaust gas treatment box 13, and control valves are installed outside the liquid inlet pipe 16 and the liquid discharge pipe 10.

[0041] Please refer to the attached figure in the instruction manual Figure 1 A tooth plate surface nitriding treatment device includes a waste gas treatment box 13 bottom wall both ends are installed with a pH meter 9 extending into the inner cavity of the waste gas treatment box 13.

[0042] Please refer to the attached figure in the instruction manual Figure 1 , 2 And 3, a tooth plate surface nitriding treatment device, including, multiple groups of positioning plates 25 are arranged on both sides of the top wall of the horizontal plate 2, multiple groups of springs 23 are evenly installed on the outer wall of the side close to each other, clamping plates 24 are installed at the ends of the multiple groups of springs 23, and multiple groups of clamping rods that engage with the through holes 18 are installed on the bottom wall of the positioning plate 25.

[0043] Please refer to the attached figure in the instruction manual Figure 1 A tooth plate surface nitriding treatment device includes: a mounting frame 8 is installed at the bottom wall position of a nitriding treatment box 19, the longitudinal section of the mounting frame 8 is set to be U-shaped, a chiller 7 is installed at the bottom wall position of the inner cavity of the mounting frame 8, and a serpentine pipe 6 extending to the bottom end of the inner cavity of the nitriding treatment box 19 is installed on the chiller 7.

[0044] Please refer to the attached figure in the instruction manual Figure 1 and 4 A tooth plate surface nitriding treatment device includes: both ends of the front side wall of the nitriding treatment box 19 are hinged with a switch door body 21 through hinges, and a vertical anti-slip handle and a lock body are installed on the outside of the switch door body 21.

[0045] Please refer to the attached figure in the instruction manual Figure 1and 4 A tooth plate surface nitriding treatment device includes: liquid level windows 22 are installed at both ends of the front side wall of the exhaust gas treatment box 13, and the liquid level windows 22 and the second ventilation pipe 17 and the first ventilation pipe 15 are staggered with each other.

[0046] A method for nitriding the surface of a tooth plate, comprising the following steps:

[0047] S1: Use the mounting frame 8 to stably place the tooth plate surface nitriding treatment device at an appropriate position, then open the switch door 21 and place the tooth plate to be treated on the placement horizontal plate 2 at an appropriate position, then place the clamping plate 24, the spring 23 and the positioning plate 25 at an appropriate position on the top wall of the placement horizontal plate 2, move the clamping plate 24 to move it toward the side of the positioning plate 25 and make the spring 23 contract to produce elastic deformation, and at the same time make the clamping rod able to engage with the through hole 18 at the corresponding position, loosen the clamping plate 24, and automatically push the clamping plate 24 to move horizontally on the top wall of the placement horizontal plate 2 under the elastic force of the spring 23, so that the tooth plates of different specifications can be tightly clamped and fixed;

[0048] S2: Open the control valve on the liquid inlet pipe 16, and inject appropriate amounts of dilute sulfuric acid solution and saturated sodium hydroxide solution into the inner cavity of the exhaust gas treatment box 13 through the two groups of liquid inlet pipes 16, and separate the two groups of solutions from each other under the action of the partition 11;

[0049] S3: Close the switch door 21, open the control valves on the first air inlet pipe 3, the second air inlet pipe 4 and the third air inlet pipe 5, so that ammonia, nitrogen and nitrogen dioxide can enter the inner cavity of the nitriding treatment box 19 through the first air inlet pipe 3, the second air inlet pipe 4 and the third air inlet pipe 5 respectively, and under the action of the multiple groups of through holes 18, ammonia, nitrogen and nitrogen dioxide can participate in the nitriding treatment process of the tooth plate;

[0050] S4: When performing step S3, the plurality of switch door bodies 21 are energized to generate heat through external switches, thereby heating the air in the inner cavity of the nitriding treatment box 19, and ensuring the thoroughness of the nitriding of the surface of the tooth plate through temperature control;

[0051] S5: After steps S1-S4, the used ammonia, nitrogen and nitrogen dioxide gases can enter different positions in the inner cavity of the exhaust gas treatment box 13 through the second ventilation pipe 17 and the first ventilation pipe 15 in sequence, and the ammonia gas can be fully mixed with the dilute sulfuric acid solution under the action of the multiple groups of aeration holes 12, and the nitrogen dioxide gas can be fully mixed with the saturated sodium hydroxide solution, so that the ammonia gas and nitrogen dioxide gas can be automatically removed, and the remaining nitrogen and other gases can be discharged under the action of the exhaust pipe 14;

[0052] S6: When performing step S2, the liquid level window 22 can facilitate the staff to check the liquid level heights of the dilute sulfuric acid solution and the saturated sodium hydroxide solution in the inner cavity of the exhaust gas treatment box 13 in real time to ensure the removal effect of ammonia and nitrogen dioxide gas;

[0053] S7: After step S5, the pH meter 9 automatically measures the pH of the remaining dilute sulfuric acid solution and saturated sodium hydroxide solution in the inner cavity of the exhaust gas treatment box 13 to ensure the removal effect of ammonia and nitrogen dioxide gas;

[0054] S8: After steps S5-S7, open the control valve on the drain pipe 10 to discharge the used dilute sulfuric acid solution and sodium hydroxide solution, so as to facilitate their replacement;

[0055] S9: After steps S1-S8, the water chiller 7 is started to automatically circulate the cold water through the serpentine pipe 6, and the cold water is automatically cooled during the flow, so that the cold water can exchange heat with the hot air in the inner cavity of the nitriding treatment box 19 during the flow at the bottom of the inner cavity of the nitriding treatment box 19, thereby improving the cooling efficiency of the air in the inner cavity of the nitriding treatment box 19 and shortening the cooling time of the tooth plate;

[0056] S10: After step S9, the switch door 21 is opened again and the tooth plate in the inner cavity of the nitriding treatment box 19 is taken out.

[0057] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A tooth plate surface nitriding treatment device, comprising a nitriding treatment box (19), characterized in that: The inner cavity of the nitriding treatment box (19) is evenly installed with multiple groups of placement horizontal plates (2), and multiple groups of through holes (18) are evenly opened inside the multiple groups of placement horizontal plates (2). The top wall of the inner cavity of the nitriding treatment box (19) and the bottom wall of the multiple groups of placement horizontal plates (2) are both installed with heating components. The bottom end of the outer wall of one side of the nitriding treatment box (19) is installed with an air intake component. The outer wall of the other side of the nitriding treatment box (19) is installed with an exhaust gas treatment box (13). A partition (11) is installed at the middle position of the inner cavity of the exhaust gas treatment box (13). The nitriding treatment box (19) A second ventilation pipe (17) extending into the inner cavity of the waste gas treatment box (13) is installed at the upper end of the outer wall of the other side, and a first ventilation pipe (15) extending into the inner cavity of the waste gas treatment box (13) is installed at the upper end of the outer wall of the partition (11). Multiple groups of aeration holes (12) are evenly arranged at the bottom ends of the outer walls of the second ventilation pipe (17) and the first ventilation pipe (15). Dilute sulfuric acid solution and saturated sodium hydroxide solution are respectively filled on both sides of the inner cavity of the waste gas treatment box (13). An exhaust pipe (14) is installed at the upper end of the outer wall of the waste gas treatment box (13) away from the nitriding treatment box (19).

2. A tooth plate surface nitriding treatment device according to claim 1, characterized in that: The air intake assembly comprises a first air intake pipe (3), a second air intake pipe (4) and a third air intake pipe (5); the first air intake pipe (3), the second air intake pipe (4) and the third air intake pipe (5) are all installed at the lower end of the outer wall of the nitriding treatment box (19); the first air intake pipe (3) is interconnected with an ammonia storage device of the prior art; the second air intake pipe (4) is interconnected with a nitrogen storage device of the prior art; and the third air intake pipe (5) is interconnected with a nitrogen dioxide gas storage device of the prior art.

3. The device for nitriding the surface of a tooth plate according to claim 1, characterized in that: The heating assembly comprises a protective mesh frame (1), wherein the protective mesh frame (1) is provided in a plurality of groups, wherein the plurality of groups of the protective mesh frames (1) are respectively mounted on the top wall of the inner cavity of the nitriding treatment box (19) and the bottom wall of the plurality of groups of horizontal plates (2) being placed, and the lower end positions of the inner cavities of the plurality of groups of the protective mesh frames (1) are all provided with electric heating tubes (20).

4. The device for nitriding the surface of a tooth plate according to claim 1, characterized in that: Liquid inlet pipes (16) are installed at both ends of the top wall of the exhaust gas treatment box (13), and liquid discharge pipes (10) are installed at both ends of the bottom wall of the exhaust gas treatment box (13).

5. The device for nitriding the surface of a tooth plate according to claim 1, characterized in that: Both ends of the bottom wall of the waste gas treatment box (13) are equipped with a pH meter (9) extending into the inner cavity of the waste gas treatment box (13).

6. The device for nitriding the surface of a tooth plate according to claim 1, characterized in that: Positioning plates (25) are arranged on both sides of the top wall of the plurality of groups of the horizontal plates (2) for placement, and a plurality of groups of springs (23) are evenly installed on the outer wall of the plurality of groups of the positioning plates (25) close to each other, and clamping plates (24) are installed at the ends of the plurality of groups of the springs (23), and a plurality of groups of clamping rods that are mutually engaged with the through holes (18) are installed on the bottom wall of the positioning plates (25).

7. The device for nitriding the surface of a tooth plate according to claim 1, characterized in that: A mounting frame (8) is installed at the bottom wall of the nitriding treatment box (19), a water chiller (7) is installed at the bottom wall of the inner cavity of the mounting frame (8), and a serpentine pipe (6) extending to the bottom end of the inner cavity of the nitriding treatment box (19) is installed on the water chiller (7).

8. The device for nitriding the surface of a tooth plate according to claim 1, characterized in that: Both ends of the front side wall of the nitriding treatment box (19) are hingedly connected with a switch door body (21) via hinges.

9. The device for nitriding the surface of a tooth plate according to claim 1, characterized in that: Liquid level windows (22) are installed at both ends of the front side wall of the exhaust gas treatment box (13).

10. A method for nitriding a tooth plate surface according to any one of claims 1 to 9, characterized in that: The specific steps include: S1: Using the mounting frame (8), the tooth plate surface nitriding treatment device is stably placed at an appropriate position, then the switch door (21) is opened and the tooth plate to be treated is placed on the placement horizontal plate (2) at an appropriate position, then the clamping plate (24), the spring (23) and the positioning plate (25) are placed at an appropriate position on the top wall of the placement horizontal plate (2), the clamping plate (24) is moved to one side of the positioning plate (25) and the spring (23) is contracted to produce elastic deformation, and at the same time, the clamping rod can be mutually engaged with the through hole (18) at the corresponding position, the clamping plate (24) is released, and the clamping plate (24) is automatically pushed to move horizontally on the top wall of the placement horizontal plate (2) under the elastic force of the spring (23), so that tooth plates of different specifications can be tightly engaged and fixed; S2: Open the control valve on the liquid inlet pipe (16), and inject appropriate amounts of dilute sulfuric acid solution and saturated sodium hydroxide solution into the inner cavity of the exhaust gas treatment box (13) through the two groups of liquid inlet pipes (16), and separate the two groups of solutions from each other under the action of the partition (11); S3: closing the switch door (21), opening the control valves on the first air inlet pipe (3), the second air inlet pipe (4) and the third air inlet pipe (5), so that ammonia, nitrogen and nitrogen dioxide gases can enter the inner cavity of the nitriding treatment box (19) through the first air inlet pipe (3), the second air inlet pipe (4) and the third air inlet pipe (5), respectively, and under the action of the multiple groups of through holes (18), the ammonia, nitrogen and nitrogen dioxide gases can participate in the nitriding treatment process of the tooth plate; S4: When performing step S3, multiple switch door bodies (21) are energized to generate heat through external switches, thereby heating the air in the inner cavity of the nitriding treatment box (19), and ensuring the thoroughness of the nitriding of the surface of the tooth plate through temperature control; S5: After steps S1-S4, the used ammonia, nitrogen and nitrogen dioxide gases can enter different positions in the inner cavity of the waste gas treatment box (13) through the second ventilation pipe (17) and the first ventilation pipe (15) in sequence, and the ammonia gas can be fully mixed with the dilute sulfuric acid liquid under the action of the multiple groups of aeration holes (12), and the nitrogen dioxide gas can be fully mixed with the saturated sodium hydroxide solution, so that the ammonia gas and nitrogen dioxide gas can be automatically removed, and the remaining nitrogen and other gases can be discharged under the action of the exhaust pipe (14); S6: When performing step S2, the liquid level window (22) allows the staff to check the liquid level heights of the dilute sulfuric acid solution and the saturated sodium hydroxide solution in the inner cavity of the waste gas treatment box (13) in real time to ensure the removal effect of ammonia and nitrogen dioxide gas; S7: After step S5, the pH meter (9) automatically measures the pH of the residual dilute sulfuric acid solution and saturated sodium hydroxide solution in the inner cavity of the exhaust gas treatment box (13) to ensure the removal effect of ammonia and nitrogen dioxide gas; S8: After steps S5-S7, open the control valve on the drain pipe (10) to discharge the used dilute sulfuric acid solution and sodium hydroxide solution, so as to facilitate their replacement; S9: After steps S1-S8, the water chiller (7) is started to automatically circulate the cold water through the serpentine tube (6), and the cold water is automatically cooled during the flow, so that the cold water can exchange heat with the hot air in the inner cavity of the nitriding treatment box (19) during the flow at the bottom of the inner cavity of the nitriding treatment box (19), thereby improving the cooling efficiency of the air in the inner cavity of the nitriding treatment box (19) and shortening the cooling time of the tooth plate; S10: After step S9, the switch door (21) is opened again and the tooth plate in the inner cavity of the nitriding treatment box (19) is taken out.

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