A wastewater treatment device for machining parts nitrogenization treatment

Abstract

The application discloses to the sewage post-processing technical field, specifically to a kind of mechanical processing parts nitriding treatment wastewater treatment device, including processor casing, interval filter component and shunt component, the side of processor casing is equipped with open window, and the lower end center in processor casing is equipped with reference support cylinder, and self-rotation sleeve cap is rotationally sleeved on reference support cylinder, single and large active carbon treatment tank of wastewater treatment is set to have multiple wastewater treatment cylinder wastewater treatment device, when three wastewater treatment cylinders are carried out wastewater treatment, another wastewater treatment cylinder can be realized quick rotation switching with positioning assembly, the backflushing of interval filter component is realized, when needing to replace active carbon particles in wastewater treatment cylinder, the activity control of piston filter cartridge is realized, the convenient filling of active carbon particles is realized, and operation is convenient, in the continuous wastewater treatment process, the efficiency of wastewater treatment is improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater post-treatment technology, specifically to a wastewater treatment device for nitriding treatment of machined parts. Background Technology

[0002] Nitriding of metal parts is a surface strengthening process that introduces nitrogen into the surface of the parts to form a high-hardness, wear-resistant, and corrosion-resistant nitrided layer. Its core principle is to use physical, chemical, or physicochemical methods to allow nitrogen atoms to penetrate the metal surface and react with the metal elements, thereby improving the mechanical properties and surface characteristics of the parts to meet the requirements of specific operating conditions.

[0003] Currently, workpiece nitriding is mainly carried out through gas nitriding, ion nitriding, and liquid nitriding. In liquid nitriding, the workpiece is immersed in a molten salt bath containing cyanide, cyanate, or other nitrogen compounds. After processing, liquid nitriding generates cyanide-containing wastewater. When treating cyanide-containing wastewater, it is necessary to first remove toxicity through cyanide-breaking processes such as alkaline chlorination, and then remove suspended solids and metal ions through precipitation, filtration, and other steps. Finally, post-treatment before discharge is completed by activated carbon adsorption. In existing activated carbon tank wastewater treatment, a filter structure is set at the inlet. In continuous wastewater treatment, it is not conducive to the maintenance of the filter structure and the replacement of activated carbon particles, making it inconvenient to use. Summary of the Invention

[0004] The purpose of this invention is to provide a wastewater treatment device for nitriding treatment of machined parts, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a wastewater treatment device for nitriding treatment of machined parts, comprising:

[0006] The processor housing has an open window on one side and a reference support cylinder at the lower center inside the processor housing. A rotating cap is rotatably fitted on the reference support cylinder. Four combined sleeves are movably fitted on the rotating cap through a switching component and a positioning component. The switching component includes four rotating support blocks, and the positioning component includes a positioning control seat and four positioning rods. Each of the four combined sleeves is fitted with a wastewater treatment cylinder.

[0007] An interval filter assembly, comprising a piston filter cartridge and a fixed filter cartridge, wherein the piston filter cartridge and the fixed filter cartridge are respectively inserted into both sides of a wastewater treatment cylinder;

[0008] The diversion assembly is located at the upper end of the processor casing. The diversion assembly includes a transfer water tank and four docking seats. The four docking seats are correspondingly arranged with four wastewater treatment cylinders. Each of the four docking seats has a docking component on the side near the wastewater treatment cylinder. Each docking component includes a docking ring.

[0009] Preferably, the lower end of the inner circumference of the rotating cap is provided with several actuating teeth, and a rotating gear is horizontally provided on one side of the upper end of the reference support cylinder. One side of the rotating gear is meshed with the actuating teeth. Four bearing holes are opened on the four sides of the rotating cap. Several rotating support blocks are horizontally inserted into the bearing holes. The combined sleeve is located on the side of the rotating support block outside the rotating cap. The combined sleeve is fixedly sleeved to the center of the wastewater treatment cylinder.

[0010] Preferably, the positioning control seat is located at the upper center of the self-rotating cap. The positioning control seat has a horizontal telescopic groove on the side near the rotating support block. The four positioning rods are horizontally inserted into the four telescopic grooves through anti-disengagement blocks. The rotating support block has a square position groove on the side near the positioning rod. One side of the positioning rod passes through the positioning control seat and is inserted into the square position groove. The end of the positioning rod located in the telescopic groove is provided with a positioning spring.

[0011] Preferably, a release groove is provided on one side of each positioning rod, and a contact telescopic rod is vertically provided on the side of the open window near the processor housing inside the reference support cylinder. A guide hole is provided through the positioning control seat on one side of each telescopic groove, and the upper end of the contact telescopic rod passes through the guide hole and is inserted into the release groove.

[0012] Preferably, the upper end of the wastewater treatment cylinder is provided with a support ring, and both the upper and lower ends of the wastewater treatment cylinder are fixedly provided with annular docking plates. The piston filter cylinder is inserted into the upper end of the wastewater treatment cylinder, and the lower end of the piston filter cylinder movably passes through the support ring. The upper end of the piston filter cylinder is provided with a mating plate, and the outer circumference of the mating plate contacts the inner circumference of the annular docking plate. The lower end of the mating plate is vertically provided with several guide rods, and the lower ends of the guide rods movably pass through the support ring through anti-detachment blocks. A support spring is provided between the mating plate and the support ring, and the upper and lower ends of the support spring contact the mating plate and the support ring respectively. One end of the fixed filter cylinder is provided with a threaded plate, and the fixed filter cylinder is threadedly inserted into the lower end of the wastewater treatment cylinder through the threaded plate.

[0013] Preferably, the lower center of the four docking seats has a transfer cavity through the processor housing. An annular receiving groove is provided through the side of the docking seat near the wastewater treatment cylinder. The docking ring is vertically and movably inserted into the annular receiving groove. One end of the annular docking plate has an inner conical groove. The end of the docking ring extending out of the annular receiving groove is inserted into the inner conical groove of the annular docking plate. The diameter of the docking ring is larger than the diameter of the transfer cavity.

[0014] Preferably, an annular air groove is horizontally formed at the upper end of the annular storage groove in the docking seat, and a plurality of piston grooves are vertically formed between the annular air groove and the annular storage groove. A plurality of docking piston rods are provided at the upper end of the docking ring, and the upper ends of the plurality of docking piston rods are respectively movably inserted into the plurality of piston grooves. A return spring is provided at the end of the docking piston rod inserted into the piston groove, and an air inlet is provided on the side of the docking seat that is connected to the annular air groove.

[0015] Preferably, the four sides of the transfer water tank are respectively connected to the upper end of one side of the four docking seats by connecting pipes, and each connecting pipe is equipped with an electrically controlled sealing ball valve.

[0016] Preferably, a control cylinder is provided at the upper end of the docking seat located on one side of the open window, and a push rod is provided at the lower end of the control cylinder. The lower end of the push rod is inserted into the transfer cavity and is provided with a push plate. The diameter of the push plate is larger than the diameter of the piston filter cartridge.

[0017] Preferably, the docking seat of the control cylinder is connected to the transfer cavity on one side and has an external pipe head, and a baffle is provided on the side of the transfer cavity near the external pipe head.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The single, large activated carbon treatment tank for wastewater treatment is configured into a wastewater treatment device with multiple wastewater treatment cylinders. While three of the wastewater treatment cylinders are treating wastewater, the third wastewater treatment cylinder, in conjunction with a positioning component, can be quickly rotated and switched to achieve backwashing and cleaning of the inter-filter components. When it is necessary to replace the activated carbon particles in the wastewater treatment cylinder, the movement of the piston filter cylinder can be controlled to achieve convenient filling of activated carbon particles. The operation is worry-free and convenient, and the efficiency of wastewater treatment is improved in the continuous wastewater treatment process. Attached Figure Description

[0020] Figure 1 This is a first-view schematic diagram of the structure of the present invention;

[0021] Figure 2 For the present invention Figure 1 Schematic diagram of part A;

[0022] Figure 3 This is a second-view schematic diagram of the structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the side cross-section structure of the present invention;

[0024] Figure 5 For the present invention Figure 4 Schematic diagram of part B;

[0025] Figure 6 For the present invention Figure 5 Schematic diagram of part C;

[0026] Figure 7 For the present invention Figure 4 Schematic diagram of part D;

[0027] Figure 8 For the present invention Figure 7 Schematic diagram of part E;

[0028] Figure 9 This is a schematic diagram of the structure of the wastewater treatment cylinder and the self-rotating cap of the present invention.

[0029] Figure 10 Exploded view of the positioning control seat installation of the present invention;

[0030] Figure 11 This is an exploded view of the piston filter cartridge and wastewater treatment cartridge of the present invention.

[0031] In the diagram: 1. Processor housing; 2. Reference support cylinder; 3. Rotating cap; 4. Rotating support block; 5. Combined sleeve; 6. Wastewater treatment cylinder; 7. Actuating gear; 8. Rotating gear; 9. Positioning control seat; 10. Square position slot; 11. Positioning rod; 12. Positioning spring; 13. Release groove; 14. Contact telescopic rod; 15. Guide hole; 16. Support ring; 17. Piston filter cartridge; 18. Guide rod; 19. Support spring; 20. Fixed filter cartridge; 21. Annular docking plate; 22. Docking ring; 23. Piston groove; 24. Docking piston rod; 25. Reset spring; 26. Annular air groove; 27. Inlet air nozzle; 28. Transfer water tank; 29. ​​Docking seat; 30. Control cylinder; 31. Lower push rod; 32. Lower push plate; 33. Electrically controlled sealing ball valve; 34. External pipe head; 35. Baffle; 36. Transfer chamber. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see the appendix Figure 1-11 This application provides the following technical solutions.

[0034] Example 1: A wastewater treatment device for nitriding treatment of machined parts, comprising:

[0035] The processor housing 1 has an open window on one side. A reference support cylinder 2 is located at the center of the lower end inside the processor housing 1. A rotating cap 3 is rotatably fitted onto the reference support cylinder 2. Four combined sleeves 5 are movably mounted on the rotating cap 3 via a switching component and a positioning component. The switching component includes four rotating support blocks 4, and the positioning component includes a positioning control seat 9 and four positioning rods 11. Each of the four combined sleeves 5 is fitted with a wastewater treatment cylinder 6. Several actuating teeth 7 are located on the lower inner circumference of the rotating cap 3. A rotating gear 8 is horizontally located on one side of the upper end inside the reference support cylinder 2, and one side of the rotating gear 8 meshes with the actuating teeth 7. The rotating cap 3 is connected to the rotating sleeve 3. Four bearing holes are opened on its four sides. Several rotating support blocks 4 are horizontally inserted into the bearing holes. The combined sleeve 5 is located on the side of the rotating support block 4 outside the rotating cap 3. The combined sleeve 5 is fixedly sleeved to the center of the wastewater treatment cylinder 6. The reference support cylinder 2 is fixedly set. The rotating gear 8 is driven to rotate by the PLC servo stepper motor. At this time, the rotating gear 8 can control the rotating cap 3 to rotate at the upper end of the reference support cylinder 2. At this time, the wastewater treatment cylinder 6 is connected to the rotating cap 3 through the combined sleeve 5 and the rotating support block 4. At this time, the position switching of the four wastewater treatment cylinders 6 can be realized.

[0036] The positioning control seat 9 is located at the upper center of the self-rotating cap 3. The side of the positioning control seat 9 near the rotating support block 4 has horizontally opened telescopic grooves. Four positioning rods 11 are horizontally inserted into the four telescopic grooves via anti-detachment blocks. The side of the rotating support block 4 near the positioning rods 11 has square position grooves 10. One side of the positioning rod 11 passes through the positioning control seat 9 and is inserted into the square position groove 10. A positioning spring 12 is provided at one end of the positioning rod 11 within the telescopic groove. A release groove 13 is provided on one side of the positioning rod 11. A contact telescopic rod 14 is vertically provided inside the reference support cylinder 2 near the open window of the processor housing 1. A guide hole 15 is provided at the lower end of one side of the telescopic groove through the positioning control seat 9. The upper end of the contact telescopic rod 14 passes through the guide hole 15 and is inserted into the release groove 13. Under normal conditions, the square position... The slot 10 and the positioning rod 11 are square structures. When the wastewater treatment cylinder 6 is in a vertical position, the positioning rod 11 is inserted into the square position slot 10 under the elastic support of the positioning spring 12 to maintain the posture of the wastewater treatment cylinder 6. When the wastewater treatment cylinder 6 is in the open window position of the processor housing 1, the contact telescopic rod 14 is lifted up and down by pneumatic or electric control. When the contact telescopic rod 14 is lifted, the contact telescopic rod 14 slides into contact with the inclined surface in the release inclined slot 13, pushing the positioning rod 11 away from the square position slot 10. At this time, the wastewater treatment cylinder 6 in the open window can rotate to realize the exchange of the upper and lower positions of the wastewater treatment cylinder 6. The rotation power of the wastewater treatment cylinder 6 can be manually operated or a gear and a PLC servo stepper motor can be set on one side of the rotating support block 4 to electrically control the rotation of the wastewater treatment cylinder 6.

[0037] An intermittent filtration assembly is installed to seal the activated carbon particles inside the wastewater treatment cylinder 6 and filter the inlet and outlet water. The intermittent filtration assembly includes a piston filter cylinder 17 and a fixed filter cylinder 20, which are respectively inserted into both sides of the wastewater treatment cylinder 6. A support ring 16 is provided at the upper end of the wastewater treatment cylinder 6. Annular docking plates 21 are fixed at both the upper and lower ends of the wastewater treatment cylinder 6. The piston filter cylinder 17 is inserted into the upper end of the wastewater treatment cylinder 6, and the lower end of the piston filter cylinder 17 movably passes through the support ring 16. A mating plate is provided at the upper end of the piston filter cylinder 17, and the outer periphery of the mating plate contacts the inner periphery of the annular docking plate 21. Several guide rods 18 are vertically provided at the lower end of the mating plate, and the lower ends of the guide rods 18 movably pass through the support ring 16 through anti-detachment blocks. The mating plate and the support ring 21 are connected to the support ring 16. A support spring 19 is provided between the rings 16. The upper and lower ends of the support spring 19 are in contact with the mating disc and the support ring 16, respectively. One end of the fixed filter cylinder 20 is provided with a threaded disc. The fixed filter cylinder 20 is threadedly inserted into the lower end of the wastewater treatment cylinder 6 through the threaded disc. The fixed filter cylinder 20 can be independently disassembled from the lower end of the wastewater treatment cylinder 6. The piston filter cylinder 17 can move up and down elastically at its upper end inside the wastewater treatment cylinder 6. During normal use, the support spring 19 can maintain the position of the piston filter cylinder 17. During normal use, the mating disc of the piston filter cylinder 17 can block the upper end of the wastewater treatment cylinder 6. Thus, when activated carbon particles are filled between the piston filter cylinder 17 and the fixed filter cylinder 20, the activated carbon particles are retained inside the wastewater treatment cylinder 6, realizing the adsorption treatment of wastewater passing through the wastewater treatment cylinder 6.

[0038] A diversion assembly is set up to control the use of several wastewater treatment cylinders 6. The diversion assembly is located at the upper end of the processor housing 1. The diversion assembly includes a transfer tank 28 and four docking seats 29. The four docking seats 29 are correspondingly arranged with the four wastewater treatment cylinders 6. Each of the four docking seats 29 has a docking component on the side near the wastewater treatment cylinder 6. Each docking component includes a docking ring 22. A transfer cavity 36 is opened through the center of the lower end of the four docking seats 29 through the processor housing 1. A diversion ring 36 is opened through the side of each docking seat 29 near the wastewater treatment cylinder 6. The annular receiving groove has a docking ring 22 vertically and movably inserted into it. One end of the annular docking plate 21 is provided with an inner conical groove. The end of the docking ring 22 extending out of the annular receiving groove is inserted into the inner conical groove of the annular docking plate 21. The diameter of the docking ring 22 is larger than the diameter of the transfer cavity 36. When high-pressure gas is filled into the annular gas groove 26, the high-pressure gas pushes the docking piston rod 24 and the docking ring 22 to descend. At this time, the lower end of the docking ring 22 is inserted into the inner conical groove of the annular docking plate 21, connecting the wastewater treatment cylinder 6 and the transfer cavity 36.

[0039] An annular air groove 26 is horizontally opened at the upper end of the annular receiving groove inside the docking seat 29. Several piston grooves 23 are vertically opened between the annular air groove 26 and the annular receiving groove. Several docking piston rods 24 are provided at the upper end of the docking ring 22. The upper ends of the several docking piston rods 24 are respectively movably inserted into several piston grooves 23. Each end of the docking piston rod 24 inserted into the piston groove 23 is provided with a return spring 25. And the docking seat 29 is provided with an air inlet 27 on one side connected to the annular air groove 26. When the push rod 31 pushes the push plate 32 down, the push plate 32 can push the piston filter cylinder 17 down along the support ring 16 and the guide rod 18. At this time, the mating plate of the piston filter cylinder 17 is misaligned with the annular docking plate 21. At this time, the activated carbon particles in the wastewater treatment cylinder 6 can be discharged or external activated carbon particles can be filled in.

[0040] Example 2: Based on Example 1, the four sides of the transfer tank 28 are respectively connected to the upper ends of one side of the four docking seats 29 by connecting pipes. Each connecting pipe is equipped with an electrically controlled sealing ball valve 33. The upper end of the docking seat 29 located on the open window side is equipped with a control cylinder 30. The lower end of the control cylinder 30 is equipped with a push rod 31. The lower end of the push rod 31 is inserted into the transfer cavity 36 and is equipped with a push plate 32. The diameter of the push plate 32 is larger than the diameter of the piston filter cartridge 17. The side of the docking seat 29 equipped with the control cylinder 30 is connected to the transfer cavity 36 and is equipped with an external pipe head 34. The side of the transfer cavity 36 near the external pipe head 34 is equipped with a baffle 35. Normally, only three of the four wastewater treatment cylinders 6 need to be used. When the wastewater treatment cylinder 6 needs to be cleaned by the piston filter cartridge 17, the other three wastewater treatment cylinders 6 are normally connected to the transfer water tank 28 for wastewater treatment through the electrically controlled sealing ball valve 33. The wastewater treatment cylinder 6 located in the open window position is disconnected from the transfer water tank 28 through the electrically controlled sealing ball valve 33. At this time, the wastewater treatment cylinder 6 is flipped up and down, with the fixed filter cartridge 20 facing up and the piston filter cartridge 17 facing down. When the high-pressure flushing solution is sent into the external pipe head 34, the piston filter cartridge 17 can be backwashed while the activated carbon is being flushed.

[0041] When the activated carbon granules need to be replaced, the fixed filter cartridge 20 can be removed from the lower end of the wastewater treatment cylinder 6. The used activated carbon granules can be discharged directly. After discharge, the fixed filter cartridge 20 can be installed. The lower push rod 31 controls the lower push plate 32 to push the piston filter cartridge 17 down. At this time, the activated carbon granules fill the wastewater treatment cylinder 6 from the top. Then, the piston filter cartridge 17 is lifted and reset under the elastic force of the support spring 19. During this process, the normal wastewater treatment of other wastewater treatment cylinders 6 is not affected. Only a short interruption is needed when switching wastewater treatment cylinders 6. When the wastewater treatment pressure is high, all four wastewater treatment cylinders 6 can be used at the same time.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wastewater treatment device for nitriding treatment of machined parts, characterized in that, Include: The processor cover (1) is provided with an open window on one side, and a reference support cylinder (2) is arranged at the lower end of the processor cover (1), a rotation sleeve cap (3) is arranged on the reference support cylinder (2), four combined sleeves (5) are movably arranged on the rotation sleeve cap (3) through switching components and positioning components, the switching components include four rotating support blocks (4), the positioning components include a positioning control seat (9) and four positioning rods (11), and the four combined sleeves (5) are sleeved with wastewater treatment cylinders (6); The interval filter assembly includes a piston filter cylinder (17) and a fixed filter cylinder (20), the piston filter cylinder (17) and the fixed filter cylinder (20) are respectively inserted into the two sides of the wastewater treatment cylinder (6), and the piston filter cylinder (17) and the fixed filter cylinder (20) are filled with activated carbon particles; The shunt assembly is arranged at the upper end of the processor cover (1), and includes a transfer water tank (28) and four docking seats (29), the four docking seats (29) are arranged corresponding to the four wastewater treatment cylinders (6), and the docking assembly is arranged on one side of the wastewater treatment cylinder (6). The wastewater treatment cylinder (6) is provided with a support ring (16) at the upper end, and the upper and lower ends of the wastewater treatment cylinder (6) are fixedly provided with annular docking discs (21), the piston filter cylinder (17) is inserted into the upper end of the wastewater treatment cylinder (6), the lower end of the piston filter cylinder (17) movably penetrates the support ring (16), the upper end of the piston filter cylinder (17) is provided with a matching disc, the outer circumferential side of the matching disc is in contact with the inner circumferential side of the annular docking disc (21), the lower end of the matching disc is vertically provided with a plurality of guide rods (18), the lower ends of the plurality of guide rods (18) are movably penetrated through the support ring (16) through anti-dropping blocks, the support spring (19) is arranged between the matching disc and the support ring (16), the upper and lower ends of the support spring (19) are in contact with the matching disc and the support ring (16) respectively, one end of the fixed filter cylinder (20) is provided with a threaded disc, and the fixed filter cylinder (20) is threadedly inserted into the lower end of the wastewater treatment cylinder (6) through the threaded disc; The lower end of the four docking seats (29) penetrates the transfer cavity (36) of the processor cover (1), the side of the docking seat (29) close to the wastewater treatment cylinder (6) is provided with an annular storage groove, the annular docking disc (21) is vertically movably inserted into the annular storage groove, one end of the annular docking disc (21) is provided with an inner tapered groove, the end of the annular docking disc (21) extending out of the annular storage groove is inserted into the inner tapered groove of the annular docking disc (21), and the diameter of the annular docking disc (21) is greater than the diameter of the transfer cavity (36).

2. The wastewater treatment device for treating wastewater from a process of nitriding a mechanical component according to claim 1, characterized in that: The inner circumferential side lower end of the self-rotation cover cap (3) is provided with a plurality of push teeth (7), the inner upper end of the reference support cylinder (2) is horizontally provided with a rotating gear (8), one side of the rotating gear (8) is connected with the push teeth (7) in meshing, four bearing holes are formed in the four sides of the self-rotation cover cap (3), a plurality of rotating support blocks (4) are respectively horizontally inserted through the bearing holes, a combined sleeve (5) is arranged on the side of the rotating support block (4) located outside the self-rotation cover cap (3), and the combined sleeve (5) is fixedly sleeved with the center of the wastewater treatment cylinder (6).

3. The mechanical parts machining and nitriding process wastewater treatment device according to claim 2, characterized in that: The positioning control seat (9) is arranged at the center of the inner upper end of the self-rotation cover cap (3), the side of the positioning control seat (9) close to the rotating support block (4) is horizontally provided with an expansion slot, four positioning insertion rods (11) are respectively inserted into the four expansion slots through the anti-dropping blocks, the side of the rotating support block (4) close to the positioning insertion rod (11) is provided with a square position slot (10), one side of the positioning insertion rod (11) penetrates through the positioning control seat (9) and is inserted into the square position slot (10), and one end of the positioning insertion rod (11) located in the expansion slot is provided with a positioning spring (12).

4. The mechanical parts machining and nitriding process wastewater treatment device according to claim 3, characterized in that: One side of the positioning insertion rod (11) is provided with a release inclined slot (13), the inner side of the reference support cylinder (2) close to the open window of the processor sleeve shell (1) is vertically provided with a contact expansion rod (14), the lower end of one side of the expansion slot is provided with a guide hole (15) penetrating through the positioning control seat (9), and the upper end of the contact expansion rod (14) penetrates through the guide hole (15) and is inserted into the release inclined slot (13).

5. The mechanical parts machining and nitriding process wastewater treatment device according to claim 4, characterized in that: The upper end of the annular receiving groove in the docking seat (29) is horizontally provided with an annular air groove (26), a plurality of piston grooves (23) are vertically arranged between the annular air groove (26) and the annular receiving groove, the upper end of the docking ring (22) is provided with a plurality of docking piston rods (24), the upper ends of the plurality of docking piston rods (24) are respectively movably inserted into the plurality of piston grooves (23), one end of the docking piston rod (24) inserted into the piston groove (23) is provided with a reset spring (25), and one side of the docking seat (29) connected with the annular air groove (26) is provided with an air inlet nozzle (27).

6. The wastewater treatment device for treating wastewater from a process of nitriding a mechanical component according to claim 5, characterized in that: The four sides of the transfer water tank (28) are respectively connected with the upper ends of the four docking seats (29) and are provided with a connecting pipe, and the connecting pipe is provided with an electric control blocking ball valve (33).

7. The mechanical parts machining and nitriding waste water treatment device according to claim 6, characterized in that: The upper end of the docking seat (29) located on the open window is provided with a control cylinder (30), the lower end of the control cylinder (30) is provided with a push rod (31), the lower end of the push rod (31) is inserted into a transfer cavity (36) and is provided with a push plate (32), and the diameter of the push plate (32) is greater than the diameter of the piston filter cylinder (17).

8. The wastewater treatment device for treating wastewater from a process of nitriding a mechanical component according to claim 7, characterized in that: The side of the docking seat (29) provided with the control cylinder (30) is connected with the transfer cavity (36) and is provided with an external pipe joint (34), and the side of the transfer cavity (36) close to the external pipe joint (34) is provided with a baffle (35).

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